diff --git a/camera/CaptureResult.cpp b/camera/CaptureResult.cpp
index e6c0d00..928a6bc 100644
--- a/camera/CaptureResult.cpp
+++ b/camera/CaptureResult.cpp
@@ -60,6 +60,39 @@
     return OK;
 }
 
+status_t PhysicalCaptureResultInfo::readFromParcel(const android::Parcel* parcel) {
+    status_t res;
+
+    mPhysicalCameraId.remove(mPhysicalCameraId.size());
+    mPhysicalCameraMetadata.clear();
+
+    if ((res = parcel->readString16(&mPhysicalCameraId)) != OK) {
+        ALOGE("%s: Failed to read camera id: %d", __FUNCTION__, res);
+        return res;
+    }
+
+    if ((res = mPhysicalCameraMetadata.readFromParcel(parcel)) != OK) {
+        ALOGE("%s: Failed to read metadata from parcel: %d", __FUNCTION__, res);
+        return res;
+    }
+    return OK;
+}
+
+status_t PhysicalCaptureResultInfo::writeToParcel(android::Parcel* parcel) const {
+    status_t res;
+    if ((res = parcel->writeString16(mPhysicalCameraId)) != OK) {
+        ALOGE("%s: Failed to write physical camera ID to parcel: %d",
+                __FUNCTION__, res);
+        return res;
+    }
+    if ((res = mPhysicalCameraMetadata.writeToParcel(parcel)) != OK) {
+        ALOGE("%s: Failed to write physical camera metadata to parcel: %d",
+                __FUNCTION__, res);
+        return res;
+    }
+    return OK;
+}
+
 CaptureResult::CaptureResult() :
         mMetadata(), mResultExtras() {
 }
@@ -67,6 +100,7 @@
 CaptureResult::CaptureResult(const CaptureResult &otherResult) {
     mResultExtras = otherResult.mResultExtras;
     mMetadata = otherResult.mMetadata;
+    mPhysicalMetadatas = otherResult.mPhysicalMetadatas;
 }
 
 status_t CaptureResult::readFromParcel(android::Parcel *parcel) {
@@ -79,6 +113,7 @@
     }
 
     mMetadata.clear();
+    mPhysicalMetadatas.clear();
 
     status_t res = OK;
     res = mMetadata.readFromParcel(parcel);
@@ -89,6 +124,34 @@
     }
     ALOGV("%s: Read metadata from parcel", __FUNCTION__);
 
+    int32_t physicalMetadataCount;
+    if ((res = parcel->readInt32(&physicalMetadataCount)) != OK) {
+        ALOGE("%s: Failed to read the physical metadata count from parcel: %d", __FUNCTION__, res);
+        return res;
+    }
+    if (physicalMetadataCount < 0) {
+        ALOGE("%s: Invalid physical metadata count from parcel: %d",
+                __FUNCTION__, physicalMetadataCount);
+        return BAD_VALUE;
+    }
+
+    for (int32_t i = 0; i < physicalMetadataCount; i++) {
+        String16 cameraId;
+        if ((res = parcel->readString16(&cameraId)) != OK) {
+            ALOGE("%s: Failed to read camera id: %d", __FUNCTION__, res);
+            return res;
+        }
+
+        CameraMetadata physicalMetadata;
+        if ((res = physicalMetadata.readFromParcel(parcel)) != OK) {
+            ALOGE("%s: Failed to read metadata from parcel: %d", __FUNCTION__, res);
+            return res;
+        }
+
+        mPhysicalMetadatas.emplace(mPhysicalMetadatas.end(), cameraId, physicalMetadata);
+    }
+    ALOGV("%s: Read physical metadata from parcel", __FUNCTION__);
+
     res = mResultExtras.readFromParcel(parcel);
     if (res != OK) {
         ALOGE("%s: Failed to read result extras from parcel.",
@@ -118,6 +181,27 @@
     }
     ALOGV("%s: Wrote metadata to parcel", __FUNCTION__);
 
+    int32_t physicalMetadataCount = static_cast<int32_t>(mPhysicalMetadatas.size());
+    res = parcel->writeInt32(physicalMetadataCount);
+    if (res != OK) {
+        ALOGE("%s: Failed to write physical metadata count to parcel: %d",
+                __FUNCTION__, res);
+        return BAD_VALUE;
+    }
+    for (const auto& physicalMetadata : mPhysicalMetadatas) {
+        if ((res = parcel->writeString16(physicalMetadata.mPhysicalCameraId)) != OK) {
+            ALOGE("%s: Failed to write physical camera ID to parcel: %d",
+                    __FUNCTION__, res);
+            return res;
+        }
+        if ((res = physicalMetadata.mPhysicalCameraMetadata.writeToParcel(parcel)) != OK) {
+            ALOGE("%s: Failed to write physical camera metadata to parcel: %d",
+                    __FUNCTION__, res);
+            return res;
+        }
+    }
+    ALOGV("%s: Wrote physical camera metadata to parcel", __FUNCTION__);
+
     res = mResultExtras.writeToParcel(parcel);
     if (res != OK) {
         ALOGE("%s: Failed to write result extras to parcel", __FUNCTION__);
diff --git a/camera/aidl/android/hardware/camera2/ICameraDeviceCallbacks.aidl b/camera/aidl/android/hardware/camera2/ICameraDeviceCallbacks.aidl
index 4db7f85..58b19a3 100644
--- a/camera/aidl/android/hardware/camera2/ICameraDeviceCallbacks.aidl
+++ b/camera/aidl/android/hardware/camera2/ICameraDeviceCallbacks.aidl
@@ -18,6 +18,7 @@
 
 import android.hardware.camera2.impl.CameraMetadataNative;
 import android.hardware.camera2.impl.CaptureResultExtras;
+import android.hardware.camera2.impl.PhysicalCaptureResultInfo;
 
 /** @hide */
 interface ICameraDeviceCallbacks
@@ -36,7 +37,8 @@
     oneway void onDeviceIdle();
     oneway void onCaptureStarted(in CaptureResultExtras resultExtras, long timestamp);
     oneway void onResultReceived(in CameraMetadataNative result,
-                                 in CaptureResultExtras resultExtras);
+                                 in CaptureResultExtras resultExtras,
+                                 in PhysicalCaptureResultInfo[] physicalCaptureResultInfos);
     oneway void onPrepared(int streamId);
 
     /**
diff --git a/camera/aidl/android/hardware/camera2/impl/PhysicalCaptureResultInfo.aidl b/camera/aidl/android/hardware/camera2/impl/PhysicalCaptureResultInfo.aidl
new file mode 100644
index 0000000..78d9b7b
--- /dev/null
+++ b/camera/aidl/android/hardware/camera2/impl/PhysicalCaptureResultInfo.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.camera2.impl;
+
+/** @hide */
+parcelable PhysicalCaptureResultInfo cpp_header "camera/CaptureResult.h";
diff --git a/camera/include/camera/CaptureResult.h b/camera/include/camera/CaptureResult.h
index 917d953..56fa178 100644
--- a/camera/include/camera/CaptureResult.h
+++ b/camera/include/camera/CaptureResult.h
@@ -91,14 +91,36 @@
     virtual status_t                readFromParcel(const android::Parcel* parcel) override;
     virtual status_t                writeToParcel(android::Parcel* parcel) const override;
 };
+
+struct PhysicalCaptureResultInfo : public android::Parcelable {
+
+    PhysicalCaptureResultInfo()
+        : mPhysicalCameraId(),
+          mPhysicalCameraMetadata() {
+    }
+    PhysicalCaptureResultInfo(const String16& cameraId,
+            const CameraMetadata& cameraMetadata)
+            : mPhysicalCameraId(cameraId),
+              mPhysicalCameraMetadata(cameraMetadata) {
+    }
+
+    String16  mPhysicalCameraId;
+    CameraMetadata mPhysicalCameraMetadata;
+
+    virtual status_t                readFromParcel(const android::Parcel* parcel) override;
+    virtual status_t                writeToParcel(android::Parcel* parcel) const override;
+};
+
 } // namespace impl
 } // namespace camera2
 } // namespace hardware
 
 using hardware::camera2::impl::CaptureResultExtras;
+using hardware::camera2::impl::PhysicalCaptureResultInfo;
 
 struct CaptureResult : public virtual LightRefBase<CaptureResult> {
     CameraMetadata          mMetadata;
+    std::vector<PhysicalCaptureResultInfo> mPhysicalMetadatas;
     CaptureResultExtras     mResultExtras;
 
     CaptureResult();
diff --git a/camera/ndk/impl/ACameraDevice.cpp b/camera/ndk/impl/ACameraDevice.cpp
index ef1c61f..907debc 100644
--- a/camera/ndk/impl/ACameraDevice.cpp
+++ b/camera/ndk/impl/ACameraDevice.cpp
@@ -1406,7 +1406,9 @@
 binder::Status
 CameraDevice::ServiceCallback::onResultReceived(
         const CameraMetadata& metadata,
-        const CaptureResultExtras& resultExtras) {
+        const CaptureResultExtras& resultExtras,
+        const std::vector<PhysicalCaptureResultInfo>& physicalResultInfos) {
+    (void) physicalResultInfos;
     binder::Status ret = binder::Status::ok();
 
     sp<CameraDevice> dev = mDevice.promote();
diff --git a/camera/ndk/impl/ACameraDevice.h b/camera/ndk/impl/ACameraDevice.h
index 1db3dfb..1369148 100644
--- a/camera/ndk/impl/ACameraDevice.h
+++ b/camera/ndk/impl/ACameraDevice.h
@@ -74,7 +74,8 @@
         binder::Status onCaptureStarted(const CaptureResultExtras& resultExtras,
                               int64_t timestamp) override;
         binder::Status onResultReceived(const CameraMetadata& metadata,
-                              const CaptureResultExtras& resultExtras) override;
+                              const CaptureResultExtras& resultExtras,
+                              const std::vector<PhysicalCaptureResultInfo>& physicalResultInfos) override;
         binder::Status onPrepared(int streamId) override;
         binder::Status onRequestQueueEmpty() override;
         binder::Status onRepeatingRequestError(int64_t lastFrameNumber,
diff --git a/camera/tests/CameraBinderTests.cpp b/camera/tests/CameraBinderTests.cpp
index 24c0c51..1de7013 100644
--- a/camera/tests/CameraBinderTests.cpp
+++ b/camera/tests/CameraBinderTests.cpp
@@ -198,9 +198,11 @@
 
 
     virtual binder::Status onResultReceived(const CameraMetadata& metadata,
-            const CaptureResultExtras& resultExtras) {
+            const CaptureResultExtras& resultExtras,
+            const std::vector<PhysicalCaptureResultInfo>& physicalResultInfos) {
         (void) metadata;
         (void) resultExtras;
+        (void) physicalResultInfos;
         Mutex::Autolock l(mLock);
         mLastStatus = SENT_RESULT;
         mStatusesHit.push_back(mLastStatus);
diff --git a/cmds/screenrecord/screenrecord.cpp b/cmds/screenrecord/screenrecord.cpp
index f9e4639..46bd8f0 100644
--- a/cmds/screenrecord/screenrecord.cpp
+++ b/cmds/screenrecord/screenrecord.cpp
@@ -73,6 +73,7 @@
 static enum {
     FORMAT_MP4, FORMAT_H264, FORMAT_FRAMES, FORMAT_RAW_FRAMES
 } gOutputFormat = FORMAT_MP4;           // data format for output
+static AString gCodecName = "";         // codec name override
 static bool gSizeSpecified = false;     // was size explicitly requested?
 static bool gWantInfoScreen = false;    // do we want initial info screen?
 static bool gWantFrameTime = false;     // do we want times on each frame?
@@ -154,6 +155,7 @@
     if (gVerbose) {
         printf("Configuring recorder for %dx%d %s at %.2fMbps\n",
                 gVideoWidth, gVideoHeight, kMimeTypeAvc, gBitRate / 1000000.0);
+        fflush(stdout);
     }
 
     sp<AMessage> format = new AMessage;
@@ -169,11 +171,21 @@
     looper->setName("screenrecord_looper");
     looper->start();
     ALOGV("Creating codec");
-    sp<MediaCodec> codec = MediaCodec::CreateByType(looper, kMimeTypeAvc, true);
-    if (codec == NULL) {
-        fprintf(stderr, "ERROR: unable to create %s codec instance\n",
-                kMimeTypeAvc);
-        return UNKNOWN_ERROR;
+    sp<MediaCodec> codec;
+    if (gCodecName.empty()) {
+        codec = MediaCodec::CreateByType(looper, kMimeTypeAvc, true);
+        if (codec == NULL) {
+            fprintf(stderr, "ERROR: unable to create %s codec instance\n",
+                    kMimeTypeAvc);
+            return UNKNOWN_ERROR;
+        }
+    } else {
+        codec = MediaCodec::CreateByComponentName(looper, gCodecName);
+        if (codec == NULL) {
+            fprintf(stderr, "ERROR: unable to create %s codec instance\n",
+                    gCodecName.c_str());
+            return UNKNOWN_ERROR;
+        }
     }
 
     err = codec->configure(format, NULL, NULL,
@@ -275,9 +287,11 @@
         if (gRotate) {
             printf("Rotated content area is %ux%u at offset x=%d y=%d\n",
                     outHeight, outWidth, offY, offX);
+            fflush(stdout);
         } else {
             printf("Content area is %ux%u at offset x=%d y=%d\n",
                     outWidth, outHeight, offX, offY);
+            fflush(stdout);
         }
     }
 
@@ -346,6 +360,7 @@
         if (systemTime(CLOCK_MONOTONIC) > endWhenNsec) {
             if (gVerbose) {
                 printf("Time limit reached\n");
+                fflush(stdout);
             }
             break;
         }
@@ -483,6 +498,7 @@
         printf("Encoder stopping; recorded %u frames in %" PRId64 " seconds\n",
                 debugNumFrames, nanoseconds_to_seconds(
                         systemTime(CLOCK_MONOTONIC) - startWhenNsec));
+        fflush(stdout);
     }
     return NO_ERROR;
 }
@@ -556,6 +572,7 @@
         printf("Main display is %dx%d @%.2ffps (orientation=%u)\n",
                 mainDpyInfo.w, mainDpyInfo.h, mainDpyInfo.fps,
                 mainDpyInfo.orientation);
+        fflush(stdout);
     }
 
     bool rotated = isDeviceRotated(mainDpyInfo.orientation);
@@ -623,6 +640,7 @@
         }
         if (gVerbose) {
             printf("Bugreport overlay created\n");
+            fflush(stdout);
         }
     } else {
         // Use the encoder's input surface as the virtual display surface.
@@ -715,6 +733,7 @@
 
         if (gVerbose) {
             printf("Stopping encoder and muxer\n");
+            fflush(stdout);
         }
     }
 
@@ -761,6 +780,7 @@
             printf(" %s", argv[i]);
         }
         putchar('\n');
+        fflush(stdout);
     }
 
     pid_t pid = fork();
@@ -898,6 +918,7 @@
         { "show-frame-time",    no_argument,        NULL, 'f' },
         { "rotate",             no_argument,        NULL, 'r' },
         { "output-format",      required_argument,  NULL, 'o' },
+        { "codec-name",         required_argument,  NULL, 'N' },
         { "monotonic-time",     no_argument,        NULL, 'm' },
         { NULL,                 0,                  NULL, 0 }
     };
@@ -978,6 +999,9 @@
                 return 2;
             }
             break;
+        case 'N':
+            gCodecName = optarg;
+            break;
         case 'm':
             gMonotonicTime = true;
             break;
diff --git a/drm/libmediadrm/Android.bp b/drm/libmediadrm/Android.bp
index 2e8da4b..ea239c5 100644
--- a/drm/libmediadrm/Android.bp
+++ b/drm/libmediadrm/Android.bp
@@ -18,6 +18,7 @@
         "PluginMetricsReporting.cpp",
         "SharedLibrary.cpp",
         "DrmHal.cpp",
+	"DrmMetrics.cpp",
         "CryptoHal.cpp",
         "protos/plugin_metrics.proto",
     ],
diff --git a/drm/libmediadrm/DrmHal.cpp b/drm/libmediadrm/DrmHal.cpp
index e51ec4d..7ab0bcd 100644
--- a/drm/libmediadrm/DrmHal.cpp
+++ b/drm/libmediadrm/DrmHal.cpp
@@ -30,6 +30,7 @@
 #include <media/DrmHal.h>
 #include <media/DrmSessionClientInterface.h>
 #include <media/DrmSessionManager.h>
+#include <media/EventMetric.h>
 #include <media/PluginMetricsReporting.h>
 #include <media/drm/DrmAPI.h>
 #include <media/stagefright/foundation/ADebug.h>
@@ -53,6 +54,14 @@
 using ::android::hidl::manager::V1_0::IServiceManager;
 using ::android::sp;
 
+namespace {
+
+// This constant corresponds to the PROPERTY_DEVICE_UNIQUE_ID constant
+// in the MediaDrm API.
+constexpr char kPropertyDeviceUniqueId[] = "deviceUniqueId";
+
+}
+
 namespace android {
 
 #define INIT_CHECK() {if (mInitCheck != OK) return mInitCheck;}
@@ -227,15 +236,14 @@
 DrmHal::DrmHal()
    : mDrmSessionClient(new DrmSessionClient(this)),
      mFactories(makeDrmFactories()),
-     mOpenSessionCounter("/drm/mediadrm/open_session", "status"),
      mInitCheck((mFactories.size() == 0) ? ERROR_UNSUPPORTED : NO_INIT) {
 }
 
 void DrmHal::closeOpenSessions() {
     if (mPlugin != NULL) {
-        for (size_t i = 0; i < mOpenSessions.size(); i++) {
-            mPlugin->closeSession(toHidlVec(mOpenSessions[i]));
-            DrmSessionManager::Instance()->removeSession(mOpenSessions[i]);
+        auto openSessions = mOpenSessions;
+        for (size_t i = 0; i < openSessions.size(); i++) {
+            closeSession(openSessions[i]);
         }
     }
     mOpenSessions.clear();
@@ -320,6 +328,7 @@
 
 Return<void> DrmHal::sendEvent(EventType hEventType,
         const hidl_vec<uint8_t>& sessionId, const hidl_vec<uint8_t>& data) {
+    mMetrics.mEventCounter.Increment(hEventType);
 
     mEventLock.lock();
     sp<IDrmClient> listener = mListener;
@@ -410,12 +419,21 @@
                 break;
             }
             obj.writeInt32(type);
+            mMetrics.mKeyStatusChangeCounter.Increment(keyStatus.type);
         }
         obj.writeInt32(hasNewUsableKey);
 
         Mutex::Autolock lock(mNotifyLock);
         listener->notify(DrmPlugin::kDrmPluginEventKeysChange, 0, &obj);
+    } else {
+        // There's no listener. But we still want to count the key change
+        // events.
+        size_t nKeys = keyStatusList.size();
+        for (size_t i = 0; i < nKeys; i++) {
+            mMetrics.mKeyStatusChangeCounter.Increment(keyStatusList[i].type);
+        }
     }
+
     return Void();
 }
 
@@ -519,7 +537,7 @@
         mOpenSessions.push(sessionId);
     }
 
-    mOpenSessionCounter.Increment(err);
+    mMetrics.mOpenSessionCounter.Increment(err);
     return err;
 }
 
@@ -539,8 +557,11 @@
             }
         }
         reportMetrics();
-        return toStatusT(status);
+        status_t response = toStatusT(status);
+        mMetrics.mCloseSessionCounter.Increment(response);
+        return response;
     }
+    mMetrics.mCloseSessionCounter.Increment(DEAD_OBJECT);
     return DEAD_OBJECT;
 }
 
@@ -551,6 +572,7 @@
         String8 &defaultUrl, DrmPlugin::KeyRequestType *keyRequestType) {
     Mutex::Autolock autoLock(mLock);
     INIT_CHECK();
+    EventTimer<status_t> keyRequestTimer(&mMetrics.mGetKeyRequestTiming);
 
     DrmSessionManager::Instance()->useSession(sessionId);
 
@@ -562,6 +584,7 @@
     } else if (keyType == DrmPlugin::kKeyType_Release) {
         hKeyType = KeyType::RELEASE;
     } else {
+        keyRequestTimer.SetAttribute(BAD_VALUE);
         return BAD_VALUE;
     }
 
@@ -636,12 +659,16 @@
                 }
             });
 
-    return hResult.isOk() ? err : DEAD_OBJECT;
+    err = hResult.isOk() ? err : DEAD_OBJECT;
+    keyRequestTimer.SetAttribute(err);
+    return err;
 }
 
 status_t DrmHal::provideKeyResponse(Vector<uint8_t> const &sessionId,
         Vector<uint8_t> const &response, Vector<uint8_t> &keySetId) {
     Mutex::Autolock autoLock(mLock);
+    EventTimer<status_t> keyResponseTimer(&mMetrics.mProvideKeyResponseTiming);
+
     INIT_CHECK();
 
     DrmSessionManager::Instance()->useSession(sessionId);
@@ -657,8 +684,9 @@
                 err = toStatusT(status);
             }
         );
-
-    return hResult.isOk() ? err : DEAD_OBJECT;
+    err = hResult.isOk() ? err : DEAD_OBJECT;
+    keyResponseTimer.SetAttribute(err);
+    return err;
 }
 
 status_t DrmHal::removeKeys(Vector<uint8_t> const &keySetId) {
@@ -722,7 +750,9 @@
             }
         );
 
-    return hResult.isOk() ? err : DEAD_OBJECT;
+    err = hResult.isOk() ? err : DEAD_OBJECT;
+    mMetrics.mGetProvisionRequestCounter.Increment(err);
+    return err;
 }
 
 status_t DrmHal::provideProvisionResponse(Vector<uint8_t> const &response,
@@ -743,7 +773,9 @@
             }
         );
 
-    return hResult.isOk() ? err : DEAD_OBJECT;
+    err = hResult.isOk() ? err : DEAD_OBJECT;
+    mMetrics.mProvideProvisionResponseCounter.Increment(err);
+    return err;
 }
 
 status_t DrmHal::getSecureStops(List<Vector<uint8_t>> &secureStops) {
@@ -965,7 +997,11 @@
             }
     );
 
-    return hResult.isOk() ? err : DEAD_OBJECT;
+    err = hResult.isOk() ? err : DEAD_OBJECT;
+    if (name == kPropertyDeviceUniqueId) {
+        mMetrics.mGetDeviceUniqueIdCounter.Increment(err);
+    }
+    return err;
 }
 
 status_t DrmHal::setPropertyString(String8 const &name, String8 const &value ) const {
@@ -987,26 +1023,12 @@
     return toStatusT(status);
 }
 
-status_t DrmHal::getMetrics(MediaAnalyticsItem* metrics) {
-    // TODO: Move mOpenSessionCounter and suffixes to a separate class
-    // that manages the collection of metrics and exporting them.
-    std::string success_count_name =
-        mOpenSessionCounter.metric_name() + "/ok/count";
-    std::string error_count_name =
-        mOpenSessionCounter.metric_name() + "/error/count";
-    mOpenSessionCounter.ExportValues(
-        [&] (status_t status, int64_t value) {
-            if (status == OK) {
-                metrics->setInt64(success_count_name.c_str(), value);
-            } else {
-                int64_t total_errors(0);
-                metrics->getInt64(error_count_name.c_str(), &total_errors);
-                metrics->setInt64(error_count_name.c_str(),
-                                  total_errors + value);
-                // TODO: Add support for exporting the list of error values.
-                // This probably needs to be added to MediaAnalyticsItem.
-            }
-        });
+status_t DrmHal::getMetrics(MediaAnalyticsItem* item) {
+    if (item == nullptr) {
+      return UNEXPECTED_NULL;
+    }
+
+    mMetrics.Export(item);
     return OK;
 }
 
diff --git a/drm/libmediadrm/DrmMetrics.cpp b/drm/libmediadrm/DrmMetrics.cpp
new file mode 100644
index 0000000..258c4b0
--- /dev/null
+++ b/drm/libmediadrm/DrmMetrics.cpp
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <android-base/macros.h>
+#include <media/DrmMetrics.h>
+
+using ::android::hardware::drm::V1_0::EventType;
+using ::android::hardware::drm::V1_0::KeyStatusType;
+
+namespace {
+
+template<typename T>
+std::string GetAttributeName(T type);
+
+template<>
+std::string GetAttributeName<KeyStatusType>(KeyStatusType type) {
+  static const char* type_names[] = {
+      "USABLE", "EXPIRED", "OUTPUT_NOT_ALLOWED",
+      "STATUS_PENDING", "INTERNAL_ERROR" };
+  if (((size_t) type) > arraysize(type_names)) {
+    return "UNKNOWN_TYPE";
+  }
+  return type_names[(size_t) type];
+}
+
+template<>
+std::string GetAttributeName<EventType>(EventType type) {
+  static const char* type_names[] = {
+      "PROVISION_REQUIRED", "KEY_NEEDED", "KEY_EXPIRED",
+      "VENDOR_DEFINED", "SESSION_RECLAIMED" };
+  if (((size_t) type) > arraysize(type_names)) {
+    return "UNKNOWN_TYPE";
+  }
+  return type_names[(size_t) type];
+}
+
+template<typename T>
+void ExportCounterMetric(const android::CounterMetric<T>& counter,
+                         android::MediaAnalyticsItem* item) {
+  if (!item) {
+    ALOGE("item was unexpectedly null.");
+    return;
+  }
+  std::string success_count_name = counter.metric_name() + ".ok.count";
+  std::string error_count_name = counter.metric_name() + ".error.count";
+  counter.ExportValues(
+      [&] (const android::status_t status, const int64_t value) {
+          if (status == android::OK) {
+              item->setInt64(success_count_name.c_str(), value);
+          } else {
+              int64_t total_errors(0);
+              item->getInt64(error_count_name.c_str(), &total_errors);
+              item->setInt64(error_count_name.c_str(), total_errors + value);
+              // TODO: Add support for exporting the list of error values.
+              // This probably needs to be added to MediaAnalyticsItem.
+          }
+      });
+}
+
+template<typename T>
+void ExportCounterMetricWithAttributeNames(
+    const android::CounterMetric<T>& counter,
+    android::MediaAnalyticsItem* item) {
+  if (!item) {
+    ALOGE("item was unexpectedly null.");
+    return;
+  }
+  counter.ExportValues(
+      [&] (const T& attribute, const int64_t value) {
+          std::string name = counter.metric_name()
+              + "." + GetAttributeName(attribute) + ".count";
+          item->setInt64(name.c_str(), value);
+      });
+}
+
+template<typename T>
+void ExportEventMetric(const android::EventMetric<T>& event,
+                       android::MediaAnalyticsItem* item) {
+  if (!item) {
+    ALOGE("item was unexpectedly null.");
+    return;
+  }
+  std::string success_count_name = event.metric_name() + ".ok.count";
+  std::string error_count_name = event.metric_name() + ".error.count";
+  std::string timing_name = event.metric_name() + ".ok.average_time_micros";
+  event.ExportValues(
+      [&] (const android::status_t& status,
+           const android::EventStatistics& value) {
+          if (status == android::OK) {
+              item->setInt64(success_count_name.c_str(), value.count);
+              item->setInt64(timing_name.c_str(), value.mean);
+          } else {
+              int64_t total_errors(0);
+              item->getInt64(error_count_name.c_str(), &total_errors);
+              item->setInt64(error_count_name.c_str(),
+                             total_errors + value.count);
+              // TODO: Add support for exporting the list of error values.
+              // This probably needs to be added to MediaAnalyticsItem.
+          }
+      });
+}
+
+}  // namespace anonymous
+
+namespace android {
+
+MediaDrmMetrics::MediaDrmMetrics()
+    : mOpenSessionCounter("drm.mediadrm.open_session", "status"),
+      mCloseSessionCounter("drm.mediadrm.close_session", "status"),
+      mGetKeyRequestTiming("drm.mediadrm.get_key_request", "status"),
+      mProvideKeyResponseTiming("drm.mediadrm.provide_key_response", "status"),
+      mGetProvisionRequestCounter(
+          "drm.mediadrm.get_provision_request", "status"),
+      mProvideProvisionResponseCounter(
+          "drm.mediadrm.provide_provision_response", "status"),
+      mKeyStatusChangeCounter(
+          "drm.mediadrm.key_status_change", "key_status_type"),
+      mEventCounter("drm.mediadrm.event", "event_type"),
+      mGetDeviceUniqueIdCounter(
+          "drm.mediadrm.get_device_unique_id", "status") {
+}
+
+void MediaDrmMetrics::Export(MediaAnalyticsItem* item) {
+  if (!item) {
+    ALOGE("item was unexpectedly null.");
+    return;
+  }
+  ExportCounterMetric(mOpenSessionCounter, item);
+  ExportCounterMetric(mCloseSessionCounter, item);
+  ExportEventMetric(mGetKeyRequestTiming, item);
+  ExportEventMetric(mProvideKeyResponseTiming, item);
+  ExportCounterMetric(mGetProvisionRequestCounter, item);
+  ExportCounterMetric(mProvideProvisionResponseCounter, item);
+  ExportCounterMetricWithAttributeNames(mKeyStatusChangeCounter, item);
+  ExportCounterMetricWithAttributeNames(mEventCounter, item);
+  ExportCounterMetric(mGetDeviceUniqueIdCounter, item);
+}
+
+}  // namespace android
diff --git a/drm/libmediadrm/tests/Android.bp b/drm/libmediadrm/tests/Android.bp
index 674d3eb..fdc982d 100644
--- a/drm/libmediadrm/tests/Android.bp
+++ b/drm/libmediadrm/tests/Android.bp
@@ -10,3 +10,35 @@
       "-Wall",
     ],
 }
+
+cc_test {
+    name: "DrmMetrics_test",
+    srcs: ["DrmMetrics_test.cpp"],
+    shared_libs: [
+      "android.hardware.drm@1.0",
+      "liblog",
+      "libmediadrm",
+      "libmediametrics",
+      "libutils",
+    ],
+    include_dirs: ["frameworks/av/include/media"],
+    cflags: [
+      "-Werror",
+      "-Wall",
+    ],
+}
+
+cc_test {
+    name: "EventMetric_test",
+    srcs: ["EventMetric_test.cpp"],
+    shared_libs: [
+      "liblog",
+      "libmediadrm",
+      "libutils",
+    ],
+    include_dirs: ["frameworks/av/include/media"],
+    cflags: [
+      "-Werror",
+      "-Wall",
+    ],
+}
diff --git a/drm/libmediadrm/tests/DrmMetrics_test.cpp b/drm/libmediadrm/tests/DrmMetrics_test.cpp
new file mode 100644
index 0000000..d1948b4
--- /dev/null
+++ b/drm/libmediadrm/tests/DrmMetrics_test.cpp
@@ -0,0 +1,189 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include "DrmMetrics.h"
+
+using ::android::hardware::drm::V1_0::EventType;
+using ::android::hardware::drm::V1_0::KeyStatusType;
+
+namespace android {
+
+/**
+ * Unit tests for the MediaDrmMetrics class.
+ */
+class MediaDrmMetricsTest : public ::testing::Test {
+};
+
+TEST_F(MediaDrmMetricsTest, EmptySuccess) {
+  MediaDrmMetrics metrics;
+  MediaAnalyticsItem item;
+
+  metrics.Export(&item);
+  EXPECT_EQ(0, item.count());
+}
+
+TEST_F(MediaDrmMetricsTest, AllValuesSuccessCounts) {
+  MediaDrmMetrics metrics;
+
+  metrics.mOpenSessionCounter.Increment(OK);
+  metrics.mCloseSessionCounter.Increment(OK);
+
+  {
+    EventTimer<status_t> get_key_request_timer(&metrics.mGetKeyRequestTiming);
+    EventTimer<status_t> provide_key_response_timer(
+        &metrics.mProvideKeyResponseTiming);
+    get_key_request_timer.SetAttribute(OK);
+    provide_key_response_timer.SetAttribute(OK);
+  }
+
+  metrics.mGetProvisionRequestCounter.Increment(OK);
+  metrics.mProvideProvisionResponseCounter.Increment(OK);
+  metrics.mGetDeviceUniqueIdCounter.Increment(OK);
+
+  metrics.mKeyStatusChangeCounter.Increment(KeyStatusType::USABLE);
+  metrics.mEventCounter.Increment(EventType::PROVISION_REQUIRED);
+
+  MediaAnalyticsItem item;
+
+  metrics.Export(&item);
+  EXPECT_EQ(11, item.count());
+
+  // Verify the list of pairs of int64 metrics.
+  std::vector<std::pair<std::string, int64_t>> expected_values = {
+      { "drm.mediadrm.open_session.ok.count", 1 },
+      { "drm.mediadrm.close_session.ok.count", 1 },
+      { "drm.mediadrm.get_key_request.ok.count", 1 },
+      { "drm.mediadrm.provide_key_response.ok.count", 1 },
+      { "drm.mediadrm.get_provision_request.ok.count", 1 },
+      { "drm.mediadrm.provide_provision_response.ok.count", 1 },
+      { "drm.mediadrm.key_status_change.USABLE.count", 1 },
+      { "drm.mediadrm.event.PROVISION_REQUIRED.count", 1 },
+      { "drm.mediadrm.get_device_unique_id.ok.count", 1 }};
+  for (const auto& expected_pair : expected_values) {
+    int64_t value = -1;
+    EXPECT_TRUE(item.getInt64(expected_pair.first.c_str(), &value))
+        << "Failed to get " << expected_pair.first;
+    EXPECT_EQ(expected_pair.second, value)
+        << "Unexpected value for " << expected_pair.first;
+  }
+
+  // Validate timing values exist.
+  int64_t value = -1;
+  EXPECT_TRUE(
+      item.getInt64("drm.mediadrm.get_key_request.ok.average_time_micros",
+                    &value));
+  EXPECT_GE(value, 0);
+
+  value = -1;
+  EXPECT_TRUE(
+      item.getInt64("drm.mediadrm.provide_key_response.ok.average_time_micros",
+                    &value));
+  EXPECT_GE(value, 0);
+}
+
+TEST_F(MediaDrmMetricsTest, AllValuesFull) {
+  MediaDrmMetrics metrics;
+
+  metrics.mOpenSessionCounter.Increment(OK);
+  metrics.mOpenSessionCounter.Increment(UNEXPECTED_NULL);
+
+  metrics.mCloseSessionCounter.Increment(OK);
+  metrics.mCloseSessionCounter.Increment(UNEXPECTED_NULL);
+
+  for (status_t s : {OK, UNEXPECTED_NULL}) {
+    {
+      EventTimer<status_t> get_key_request_timer(&metrics.mGetKeyRequestTiming);
+      EventTimer<status_t> provide_key_response_timer(
+          &metrics.mProvideKeyResponseTiming);
+      get_key_request_timer.SetAttribute(s);
+      provide_key_response_timer.SetAttribute(s);
+    }
+  }
+
+  metrics.mGetProvisionRequestCounter.Increment(OK);
+  metrics.mGetProvisionRequestCounter.Increment(UNEXPECTED_NULL);
+  metrics.mProvideProvisionResponseCounter.Increment(OK);
+  metrics.mProvideProvisionResponseCounter.Increment(UNEXPECTED_NULL);
+  metrics.mGetDeviceUniqueIdCounter.Increment(OK);
+  metrics.mGetDeviceUniqueIdCounter.Increment(UNEXPECTED_NULL);
+
+  metrics.mKeyStatusChangeCounter.Increment(KeyStatusType::USABLE);
+  metrics.mKeyStatusChangeCounter.Increment(KeyStatusType::EXPIRED);
+  metrics.mKeyStatusChangeCounter.Increment(KeyStatusType::OUTPUTNOTALLOWED);
+  metrics.mKeyStatusChangeCounter.Increment(KeyStatusType::STATUSPENDING);
+  metrics.mKeyStatusChangeCounter.Increment(KeyStatusType::INTERNALERROR);
+  metrics.mEventCounter.Increment(EventType::PROVISION_REQUIRED);
+  metrics.mEventCounter.Increment(EventType::KEY_NEEDED);
+  metrics.mEventCounter.Increment(EventType::KEY_EXPIRED);
+  metrics.mEventCounter.Increment(EventType::VENDOR_DEFINED);
+  metrics.mEventCounter.Increment(EventType::SESSION_RECLAIMED);
+
+  MediaAnalyticsItem item;
+
+  metrics.Export(&item);
+  EXPECT_EQ(26, item.count());
+
+  // Verify the list of pairs of int64 metrics.
+  std::vector<std::pair<std::string, int64_t>> expected_values = {
+      { "drm.mediadrm.open_session.ok.count", 1 },
+      { "drm.mediadrm.close_session.ok.count", 1 },
+      { "drm.mediadrm.get_key_request.ok.count", 1 },
+      { "drm.mediadrm.provide_key_response.ok.count", 1 },
+      { "drm.mediadrm.get_provision_request.ok.count", 1 },
+      { "drm.mediadrm.provide_provision_response.ok.count", 1 },
+      { "drm.mediadrm.get_device_unique_id.ok.count", 1 },
+      { "drm.mediadrm.open_session.error.count", 1 },
+      { "drm.mediadrm.close_session.error.count", 1 },
+      { "drm.mediadrm.get_key_request.error.count", 1 },
+      { "drm.mediadrm.provide_key_response.error.count", 1 },
+      { "drm.mediadrm.get_provision_request.error.count", 1 },
+      { "drm.mediadrm.provide_provision_response.error.count", 1 },
+      { "drm.mediadrm.get_device_unique_id.error.count", 1 },
+      { "drm.mediadrm.key_status_change.USABLE.count", 1 },
+      { "drm.mediadrm.key_status_change.EXPIRED.count", 1 },
+      { "drm.mediadrm.key_status_change.OUTPUT_NOT_ALLOWED.count", 1 },
+      { "drm.mediadrm.key_status_change.STATUS_PENDING.count", 1 },
+      { "drm.mediadrm.key_status_change.INTERNAL_ERROR.count", 1 },
+      { "drm.mediadrm.event.PROVISION_REQUIRED.count", 1 },
+      { "drm.mediadrm.event.KEY_NEEDED.count", 1 },
+      { "drm.mediadrm.event.KEY_EXPIRED.count", 1 },
+      { "drm.mediadrm.event.VENDOR_DEFINED.count", 1 },
+      { "drm.mediadrm.event.SESSION_RECLAIMED.count", 1 }};
+  for (const auto& expected_pair : expected_values) {
+    int64_t value = -1;
+    EXPECT_TRUE(item.getInt64(expected_pair.first.c_str(), &value))
+        << "Failed to get " << expected_pair.first;
+    EXPECT_EQ(expected_pair.second, value)
+        << "Unexpected value for " << expected_pair.first;
+  }
+
+  // Validate timing values exist.
+  int64_t value = -1;
+  EXPECT_TRUE(
+      item.getInt64("drm.mediadrm.get_key_request.ok.average_time_micros",
+                    &value));
+  EXPECT_GE(value, 0);
+
+  value = -1;
+  EXPECT_TRUE(
+      item.getInt64("drm.mediadrm.provide_key_response.ok.average_time_micros",
+                    &value));
+  EXPECT_GE(value, 0);
+}
+
+}  // namespace android
diff --git a/drm/libmediadrm/tests/EventMetric_test.cpp b/drm/libmediadrm/tests/EventMetric_test.cpp
new file mode 100644
index 0000000..eb6c4f6
--- /dev/null
+++ b/drm/libmediadrm/tests/EventMetric_test.cpp
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include "EventMetric.h"
+
+namespace android {
+
+/**
+ * Unit tests for the EventMetric class.
+ */
+
+TEST(EventMetricTest, IntDataTypeEmpty) {
+  EventMetric<int> metric("MyMetricName", "MetricAttributeName");
+
+  std::map<int, EventStatistics> values;
+
+  metric.ExportValues(
+      [&] (int attribute_value, const EventStatistics& value) {
+          values[attribute_value] = value;
+      });
+
+  EXPECT_TRUE(values.empty());
+}
+
+TEST(EventMetricTest, IntDataType) {
+  EventMetric<int> metric("MyMetricName", "MetricAttributeName");
+
+  std::map<int, EventStatistics> values;
+
+  metric.Record(4, 7);
+  metric.Record(5, 8);
+  metric.Record(5, 8);
+  metric.Record(5, 8);
+  metric.Record(6, 8);
+  metric.Record(6, 8);
+  metric.Record(6, 8);
+
+  metric.ExportValues(
+      [&] (int attribute_value, const EventStatistics& value) {
+          values[attribute_value] = value;
+      });
+
+  ASSERT_EQ(2u, values.size());
+  EXPECT_EQ(4, values[7].min);
+  EXPECT_EQ(4, values[7].max);
+  EXPECT_EQ(4, values[7].mean);
+  EXPECT_EQ(1, values[7].count);
+
+  EXPECT_EQ(5, values[8].min);
+  EXPECT_EQ(6, values[8].max);
+  // This is an approximate value because of the technique we're using.
+  EXPECT_NEAR(5.5, values[8].mean, 0.2);
+  EXPECT_EQ(6, values[8].count);
+}
+
+TEST(EventMetricTest, StringDataType) {
+  EventMetric<std::string> metric("MyMetricName", "MetricAttributeName");
+
+  std::map<std::string, EventStatistics> values;
+
+  metric.Record(1, "a");
+  metric.Record(2, "b");
+  metric.Record(2, "b");
+  metric.Record(3, "b");
+  metric.Record(3, "b");
+
+  metric.ExportValues(
+      [&] (std::string attribute_value, const EventStatistics& value) {
+          values[attribute_value] = value;
+      });
+
+  ASSERT_EQ(2u, values.size());
+  EXPECT_EQ(1, values["a"].min);
+  EXPECT_EQ(1, values["a"].max);
+  EXPECT_EQ(1, values["a"].mean);
+  EXPECT_EQ(1, values["a"].count);
+
+  EXPECT_EQ(2, values["b"].min);
+  EXPECT_EQ(3, values["b"].max);
+  EXPECT_NEAR(2.5, values["b"].mean, 0.2);
+  EXPECT_EQ(4, values["b"].count);
+}
+
+// Helper class that allows us to mock the clock.
+template<typename AttributeType>
+class MockEventTimer : public EventTimer<AttributeType> {
+ public:
+  explicit MockEventTimer(nsecs_t time_delta_ns,
+                          EventMetric<AttributeType>* metric)
+      : EventTimer<AttributeType>(metric) {
+    // Pretend the event started earlier.
+    this->start_time_ = systemTime() - time_delta_ns;
+  }
+};
+
+TEST(EventTimerTest, IntDataType) {
+  EventMetric<int> metric("MyMetricName", "MetricAttributeName");
+
+  for (int i = 0; i < 5; i++) {
+    {
+      // Add a mock time delta.
+      MockEventTimer<int> metric_timer(i * 1000000, &metric);
+      metric_timer.SetAttribute(i % 2);
+    }
+  }
+
+  std::map<int, EventStatistics> values;
+  metric.ExportValues(
+      [&] (int attribute_value, const EventStatistics& value) {
+          values[attribute_value] = value;
+      });
+
+  ASSERT_EQ(2u, values.size());
+  EXPECT_LT(values[0].min, values[0].max);
+  EXPECT_GE(4000, values[0].max);
+  EXPECT_GT(values[0].mean, values[0].min);
+  EXPECT_LE(values[0].mean, values[0].max);
+  EXPECT_EQ(3, values[0].count);
+
+  EXPECT_LT(values[1].min, values[1].max);
+  EXPECT_GE(3000, values[1].max);
+  EXPECT_GT(values[1].mean, values[1].min);
+  EXPECT_LE(values[1].mean, values[1].max);
+  EXPECT_EQ(2, values[1].count);
+}
+
+}  // namespace android
diff --git a/include/media/DrmMetrics.h b/include/media/DrmMetrics.h
new file mode 120000
index 0000000..abc966b
--- /dev/null
+++ b/include/media/DrmMetrics.h
@@ -0,0 +1 @@
+../../media/libmedia/include/media/DrmMetrics.h
\ No newline at end of file
diff --git a/include/media/EventMetric.h b/include/media/EventMetric.h
new file mode 120000
index 0000000..5707d9a
--- /dev/null
+++ b/include/media/EventMetric.h
@@ -0,0 +1 @@
+../../media/libmedia/include/media/EventMetric.h
\ No newline at end of file
diff --git a/media/libaaudio/examples/loopback/src/loopback.cpp b/media/libaaudio/examples/loopback/src/loopback.cpp
index d23d907..f2254ce 100644
--- a/media/libaaudio/examples/loopback/src/loopback.cpp
+++ b/media/libaaudio/examples/loopback/src/loopback.cpp
@@ -160,16 +160,9 @@
 
 static void usage() {
     printf("Usage: aaudio_loopback [OPTION]...\n\n");
-    printf("          -c{channels}      number of output channels\n");
+    AAudioArgsParser::usage();
     printf("          -C{channels}      number of input channels\n");
     printf("          -g{gain}          recirculating loopback gain\n");
-    printf("          -m{0|1|2|3}       set MMAP policy\n");
-    printf("              0 = _UNSPECIFIED\n");
-    printf("              1 = _NEVER\n");
-    printf("              2 = _AUTO, also if -m is used with no number\n");
-    printf("              3 = _ALWAYS\n");
-    printf("          -n{numBursts}     buffer size, for example 2 for double buffered\n");
-    printf("          -p{outPerf}       set output AAUDIO_PERFORMANCE_MODE*\n");
     printf("          -P{inPerf}        set input AAUDIO_PERFORMANCE_MODE*\n");
     printf("              n for _NONE\n");
     printf("              l for _LATENCY\n");
@@ -178,8 +171,7 @@
     printf("              m for sine magnitude\n");
     printf("              e for echo latency (default)\n");
     printf("              f for file latency, analyzes %s\n\n", FILENAME_ECHOS);
-    printf("          -x                use EXCLUSIVE mode for output\n");
-    printf("          -X                use EXCLUSIVE mode for input\n");
+    printf("          -X  use EXCLUSIVE mode for input\n");
     printf("Example:  aaudio_loopback -n2 -pl -Pl -x\n");
 }
 
diff --git a/media/libaaudio/examples/utils/AAudioArgsParser.h b/media/libaaudio/examples/utils/AAudioArgsParser.h
index 142b295..4fc5b9f 100644
--- a/media/libaaudio/examples/utils/AAudioArgsParser.h
+++ b/media/libaaudio/examples/utils/AAudioArgsParser.h
@@ -88,6 +88,30 @@
         mPerformanceMode = performanceMode;
     }
 
+    aaudio_usage_t getUsage() const {
+        return mUsage;
+    }
+
+    void setUsage(aaudio_usage_t usage) {
+        mUsage = usage;
+    }
+
+    aaudio_content_type_t getContentType() const {
+        return mContentType;
+    }
+
+    void setContentType(aaudio_content_type_t contentType) {
+        mContentType = contentType;
+    }
+
+    aaudio_input_preset_t getInputPreset() const {
+        return mInputPreset;
+    }
+
+    void setInputPreset(aaudio_input_preset_t inputPreset) {
+        mInputPreset = inputPreset;
+    }
+
     int32_t getDeviceId() const {
         return mDeviceId;
     }
@@ -116,6 +140,9 @@
         AAudioStreamBuilder_setDeviceId(builder, mDeviceId);
         AAudioStreamBuilder_setSharingMode(builder, mSharingMode);
         AAudioStreamBuilder_setPerformanceMode(builder, mPerformanceMode);
+        AAudioStreamBuilder_setUsage(builder, mUsage);
+        AAudioStreamBuilder_setContentType(builder, mContentType);
+        AAudioStreamBuilder_setInputPreset(builder, mInputPreset);
     }
 
 private:
@@ -128,6 +155,10 @@
     aaudio_sharing_mode_t      mSharingMode     = AAUDIO_SHARING_MODE_SHARED;
     aaudio_performance_mode_t  mPerformanceMode = AAUDIO_PERFORMANCE_MODE_NONE;
 
+    aaudio_usage_t             mUsage           = AAUDIO_UNSPECIFIED;
+    aaudio_content_type_t      mContentType     = AAUDIO_UNSPECIFIED;
+    aaudio_input_preset_t      mInputPreset     = AAUDIO_UNSPECIFIED;
+
     int32_t                    mNumberOfBursts  = AAUDIO_UNSPECIFIED;
 };
 
@@ -158,8 +189,8 @@
                 case 'd':
                     setDeviceId(atoi(&arg[2]));
                     break;
-                case 's':
-                    mDurationSeconds = atoi(&arg[2]);
+                case 'i':
+                    setInputPreset(atoi(&arg[2]));
                     break;
                 case 'm': {
                     aaudio_policy_t policy = AAUDIO_POLICY_AUTO;
@@ -177,9 +208,18 @@
                 case 'r':
                     setSampleRate(atoi(&arg[2]));
                     break;
+                case 's':
+                    mDurationSeconds = atoi(&arg[2]);
+                    break;
+                case 'u':
+                    setUsage(atoi(&arg[2]));
+                    break;
                 case 'x':
                     setSharingMode(AAUDIO_SHARING_MODE_EXCLUSIVE);
                     break;
+                case 'y':
+                    setContentType(atoi(&arg[2]));
+                    break;
                 default:
                     unrecognized = true;
                     break;
@@ -207,24 +247,28 @@
     }
 
     static void usage() {
-        printf("-c{channels} -d{duration} -m -n{burstsPerBuffer} -p{perfMode} -r{rate} -x\n");
+        printf("-c{channels} -d{deviceId} -m{mmapPolicy} -n{burstsPerBuffer} -p{perfMode}");
+        printf(" -r{rate} -s{seconds} -x\n");
         printf("      Default values are UNSPECIFIED unless otherwise stated.\n");
         printf("      -b{bufferCapacity} frames\n");
         printf("      -c{channels} for example 2 for stereo\n");
         printf("      -d{deviceId} default is %d\n", AAUDIO_UNSPECIFIED);
-        printf("      -s{duration} in seconds, default is %d\n", DEFAULT_DURATION_SECONDS);
+        printf("      -i{inputPreset} eg. 5 for AAUDIO_INPUT_PRESET_CAMCORDER\n");
         printf("      -m{0|1|2|3} set MMAP policy\n");
-        printf("          0 = _UNSPECIFIED, default\n");
-        printf("          1 = _NEVER\n");
-        printf("          2 = _AUTO, also if -m is used with no number\n");
-        printf("          3 = _ALWAYS\n");
+        printf("          0 = _UNSPECIFIED, use aaudio.mmap_policy system property, default\n");
+        printf("          1 = _NEVER, never use MMAP\n");
+        printf("          2 = _AUTO, use MMAP if available, default for -m with no number\n");
+        printf("          3 = _ALWAYS, use MMAP or fail\n");
         printf("      -n{numberOfBursts} for setBufferSize\n");
         printf("      -p{performanceMode} set output AAUDIO_PERFORMANCE_MODE*, default NONE\n");
         printf("          n for _NONE\n");
         printf("          l for _LATENCY\n");
         printf("          p for _POWER_SAVING;\n");
         printf("      -r{sampleRate} for example 44100\n");
+        printf("      -s{duration} in seconds, default is %d\n", DEFAULT_DURATION_SECONDS);
+        printf("      -u{usage} eg. 14 for AAUDIO_USAGE_GAME\n");
         printf("      -x to use EXCLUSIVE mode\n");
+        printf("      -y{contentType} eg. 1 for AAUDIO_CONTENT_TYPE_SPEECH\n");
     }
 
     static aaudio_performance_mode_t parsePerformanceMode(char c) {
@@ -287,6 +331,17 @@
 
         printf("  PerformanceMode: requested = %d, actual = %d\n",
                getPerformanceMode(), AAudioStream_getPerformanceMode(stream));
+
+        printf("  Usage:        requested = %d, actual = %d\n",
+               getUsage(), AAudioStream_getUsage(stream));
+        printf("  ContentType:  requested = %d, actual = %d\n",
+               getContentType(), AAudioStream_getContentType(stream));
+
+        if (AAudioStream_getDirection(stream) == AAUDIO_DIRECTION_INPUT) {
+            printf("  InputPreset:  requested = %d, actual = %d\n",
+                   getInputPreset(), AAudioStream_getInputPreset(stream));
+        }
+
         printf("  Is MMAP used? %s\n", AAudioStream_isMMapUsed(stream)
                ? "yes" : "no");
 
diff --git a/media/libaaudio/examples/write_sine/src/write_sine_callback.cpp b/media/libaaudio/examples/write_sine/src/write_sine_callback.cpp
index 5d41fd0..e167773 100644
--- a/media/libaaudio/examples/write_sine/src/write_sine_callback.cpp
+++ b/media/libaaudio/examples/write_sine/src/write_sine_callback.cpp
@@ -204,7 +204,7 @@
     AAudioArgsParser::usage();
     printf("      -l{count} loopCount start/stop, every other one is silent\n");
     printf("      -t{msec}  play a high pitched tone at the beginning\n");
-    printf("      -u        force periodic Underruns by sleeping in callback\n");
+    printf("      -f        force periodic underruns by sleeping in callback\n");
 }
 
 int main(int argc, const char **argv)
@@ -234,7 +234,7 @@
                     case 't':
                         prefixToneMsec = atoi(&arg[2]);
                         break;
-                    case 'u':
+                    case 'f':
                         forceUnderruns = true;
                         break;
                     default:
diff --git a/media/libaudioclient/AudioSystem.cpp b/media/libaudioclient/AudioSystem.cpp
index 3bb09d2..7783ad3 100644
--- a/media/libaudioclient/AudioSystem.cpp
+++ b/media/libaudioclient/AudioSystem.cpp
@@ -904,6 +904,7 @@
                                 audio_session_t session,
                                 pid_t pid,
                                 uid_t uid,
+                                const String16& opPackageName,
                                 const audio_config_base_t *config,
                                 audio_input_flags_t flags,
                                 audio_port_handle_t *selectedDeviceId,
@@ -912,35 +913,29 @@
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     if (aps == 0) return NO_INIT;
     return aps->getInputForAttr(
-            attr, input, session, pid, uid,
+            attr, input, session, pid, uid, opPackageName,
             config, flags, selectedDeviceId, portId);
 }
 
-status_t AudioSystem::startInput(audio_io_handle_t input,
-                                 audio_session_t session,
-                                 audio_devices_t device,
-                                 uid_t uid,
-                                 bool *silenced)
+status_t AudioSystem::startInput(audio_port_handle_t portId, bool *silenced)
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     if (aps == 0) return PERMISSION_DENIED;
-    return aps->startInput(input, session, device, uid, silenced);
+    return aps->startInput(portId, silenced);
 }
 
-status_t AudioSystem::stopInput(audio_io_handle_t input,
-                                audio_session_t session)
+status_t AudioSystem::stopInput(audio_port_handle_t portId)
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     if (aps == 0) return PERMISSION_DENIED;
-    return aps->stopInput(input, session);
+    return aps->stopInput(portId);
 }
 
-void AudioSystem::releaseInput(audio_io_handle_t input,
-                               audio_session_t session)
+void AudioSystem::releaseInput(audio_port_handle_t portId)
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     if (aps == 0) return;
-    aps->releaseInput(input, session);
+    aps->releaseInput(portId);
 }
 
 status_t AudioSystem::initStreamVolume(audio_stream_type_t stream,
diff --git a/media/libaudioclient/IAudioPolicyService.cpp b/media/libaudioclient/IAudioPolicyService.cpp
index 6478975..b91e4cf 100644
--- a/media/libaudioclient/IAudioPolicyService.cpp
+++ b/media/libaudioclient/IAudioPolicyService.cpp
@@ -285,6 +285,7 @@
                                      audio_session_t session,
                                      pid_t pid,
                                      uid_t uid,
+                                     const String16& opPackageName,
                                      const audio_config_base_t *config,
                                      audio_input_flags_t flags,
                                      audio_port_handle_t *selectedDeviceId,
@@ -313,6 +314,7 @@
         data.writeInt32(session);
         data.writeInt32(pid);
         data.writeInt32(uid);
+        data.writeString16(opPackageName);
         data.write(config, sizeof(audio_config_base_t));
         data.writeInt32(flags);
         data.writeInt32(*selectedDeviceId);
@@ -331,18 +333,12 @@
         return NO_ERROR;
     }
 
-    virtual status_t startInput(audio_io_handle_t input,
-                                audio_session_t session,
-                                audio_devices_t device,
-                                uid_t uid,
+    virtual status_t startInput(audio_port_handle_t portId,
                                 bool *silenced)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioPolicyService::getInterfaceDescriptor());
-        data.writeInt32(input);
-        data.writeInt32(session);
-        data.writeInt32(device);
-        data.writeInt32(uid);
+        data.writeInt32(portId);
         data.writeInt32(*silenced ? 1 : 0);
         remote()->transact(START_INPUT, data, &reply);
         status_t status = static_cast <status_t> (reply.readInt32());
@@ -350,24 +346,20 @@
         return status;
     }
 
-    virtual status_t stopInput(audio_io_handle_t input,
-                               audio_session_t session)
+    virtual status_t stopInput(audio_port_handle_t portId)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioPolicyService::getInterfaceDescriptor());
-        data.writeInt32(input);
-        data.writeInt32(session);
+        data.writeInt32(portId);
         remote()->transact(STOP_INPUT, data, &reply);
         return static_cast <status_t> (reply.readInt32());
     }
 
-    virtual void releaseInput(audio_io_handle_t input,
-                              audio_session_t session)
+    virtual void releaseInput(audio_port_handle_t portId)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioPolicyService::getInterfaceDescriptor());
-        data.writeInt32(input);
-        data.writeInt32(session);
+        data.writeInt32(portId);
         remote()->transact(RELEASE_INPUT, data, &reply);
     }
 
@@ -1034,6 +1026,7 @@
             audio_session_t session = (audio_session_t)data.readInt32();
             pid_t pid = (pid_t)data.readInt32();
             uid_t uid = (uid_t)data.readInt32();
+            const String16 opPackageName = data.readString16();
             audio_config_base_t config;
             memset(&config, 0, sizeof(audio_config_base_t));
             data.read(&config, sizeof(audio_config_base_t));
@@ -1041,7 +1034,7 @@
             audio_port_handle_t selectedDeviceId = (audio_port_handle_t) data.readInt32();
             audio_port_handle_t portId = (audio_port_handle_t)data.readInt32();
             status_t status = getInputForAttr(&attr, &input, session, pid, uid,
-                                              &config,
+                                              opPackageName, &config,
                                               flags, &selectedDeviceId, &portId);
             reply->writeInt32(status);
             if (status == NO_ERROR) {
@@ -1054,12 +1047,9 @@
 
         case START_INPUT: {
             CHECK_INTERFACE(IAudioPolicyService, data, reply);
-            audio_io_handle_t input = static_cast <audio_io_handle_t>(data.readInt32());
-            audio_session_t session = static_cast <audio_session_t>(data.readInt32());
-            audio_devices_t device = static_cast <audio_devices_t>(data.readInt32());
-            uid_t uid = static_cast <uid_t>(data.readInt32());
+            audio_port_handle_t portId = static_cast <audio_port_handle_t>(data.readInt32());
             bool silenced = data.readInt32() == 1;
-            status_t status = startInput(input, session, device, uid, &silenced);
+            status_t status = startInput(portId, &silenced);
             reply->writeInt32(static_cast <uint32_t>(status));
             reply->writeInt32(silenced ? 1 : 0);
             return NO_ERROR;
@@ -1067,17 +1057,15 @@
 
         case STOP_INPUT: {
             CHECK_INTERFACE(IAudioPolicyService, data, reply);
-            audio_io_handle_t input = static_cast <audio_io_handle_t>(data.readInt32());
-            audio_session_t session = static_cast <audio_session_t>(data.readInt32());
-            reply->writeInt32(static_cast <uint32_t>(stopInput(input, session)));
+            audio_port_handle_t portId = static_cast <audio_port_handle_t>(data.readInt32());
+            reply->writeInt32(static_cast <uint32_t>(stopInput(portId)));
             return NO_ERROR;
         } break;
 
         case RELEASE_INPUT: {
             CHECK_INTERFACE(IAudioPolicyService, data, reply);
-            audio_io_handle_t input = static_cast <audio_io_handle_t>(data.readInt32());
-            audio_session_t session = static_cast <audio_session_t>(data.readInt32());
-            releaseInput(input, session);
+            audio_port_handle_t portId = static_cast <audio_port_handle_t>(data.readInt32());
+            releaseInput(portId);
             return NO_ERROR;
         } break;
 
diff --git a/media/libaudioclient/include/media/AudioMixer.h b/media/libaudioclient/include/media/AudioMixer.h
index d4ce417..2e29316 100644
--- a/media/libaudioclient/include/media/AudioMixer.h
+++ b/media/libaudioclient/include/media/AudioMixer.h
@@ -18,8 +18,11 @@
 #ifndef ANDROID_AUDIO_MIXER_H
 #define ANDROID_AUDIO_MIXER_H
 
+#include <pthread.h>
+#include <sstream>
 #include <stdint.h>
 #include <sys/types.h>
+#include <unordered_map>
 
 #include <media/AudioBufferProvider.h>
 #include <media/AudioResampler.h>
@@ -43,20 +46,14 @@
 class AudioMixer
 {
 public:
-                            AudioMixer(size_t frameCount, uint32_t sampleRate,
-                                       uint32_t maxNumTracks = MAX_NUM_TRACKS);
+    // This mixer has a hard-coded upper limit of active track inputs;
+    // the value is arbitrary but should be less than TRACK0 to avoid confusion.
+    static constexpr int32_t MAX_NUM_TRACKS = 256;
 
-    /*virtual*/             ~AudioMixer();  // non-virtual saves a v-table, restore if sub-classed
-
-
-    // This mixer has a hard-coded upper limit of 32 active track inputs.
-    // Adding support for > 32 tracks would require more than simply changing this value.
-    static const uint32_t MAX_NUM_TRACKS = 32;
-    // maximum number of channels supported by the mixer
-
+    // Do not change these unless underlying code changes.
     // This mixer has a hard-coded upper limit of 8 channels for output.
-    static const uint32_t MAX_NUM_CHANNELS = 8;
-    static const uint32_t MAX_NUM_VOLUMES = 2; // stereo volume only
+    static constexpr uint32_t MAX_NUM_CHANNELS = FCC_8;
+    static constexpr uint32_t MAX_NUM_VOLUMES = FCC_2; // stereo volume only
     // maximum number of channels supported for the content
     static const uint32_t MAX_NUM_CHANNELS_TO_DOWNMIX = AUDIO_CHANNEL_COUNT_MAX;
 
@@ -108,6 +105,12 @@
                                   // parameter 'value' is a pointer to the new playback rate.
     };
 
+    AudioMixer(size_t frameCount, uint32_t sampleRate, int32_t maxNumTracks = MAX_NUM_TRACKS)
+        : mMaxNumTracks(maxNumTracks)
+        , mSampleRate(sampleRate)
+        , mFrameCount(frameCount) {
+        pthread_once(&sOnceControl, &sInitRoutine);
+    }
 
     // For all APIs with "name": TRACK0 <= name < TRACK0 + MAX_NUM_TRACKS
 
@@ -127,27 +130,38 @@
     void        setParameter(int name, int target, int param, void *value);
 
     void        setBufferProvider(int name, AudioBufferProvider* bufferProvider);
-    void        process();
 
-    uint32_t    trackNames() const { return mTrackNames; }
+    void        process() {
+        (this->*mHook)();
+    }
 
     size_t      getUnreleasedFrames(int name) const;
 
-    static inline bool isValidPcmTrackFormat(audio_format_t format) {
-        switch (format) {
-        case AUDIO_FORMAT_PCM_8_BIT:
-        case AUDIO_FORMAT_PCM_16_BIT:
-        case AUDIO_FORMAT_PCM_24_BIT_PACKED:
-        case AUDIO_FORMAT_PCM_32_BIT:
-        case AUDIO_FORMAT_PCM_FLOAT:
-            return true;
-        default:
-            return false;
+    std::string trackNames() const {
+        std::stringstream ss;
+        for (const auto &pair : mTracks) {
+            ss << pair.first << " ";
         }
+        return ss.str();
+    }
+
+    void        setNBLogWriter(NBLog::Writer *logWriter) {
+        mNBLogWriter = logWriter;
     }
 
 private:
 
+    /* For multi-format functions (calls template functions
+     * in AudioMixerOps.h).  The template parameters are as follows:
+     *
+     *   MIXTYPE     (see AudioMixerOps.h MIXTYPE_* enumeration)
+     *   USEFLOATVOL (set to true if float volume is used)
+     *   ADJUSTVOL   (set to true if volume ramp parameters needs adjustment afterwards)
+     *   TO: int32_t (Q4.27) or float
+     *   TI: int32_t (Q4.27) or int16_t (Q0.15) or float
+     *   TA: int32_t (Q4.27)
+     */
+
     enum {
         // FIXME this representation permits up to 8 channels
         NEEDS_CHANNEL_COUNT__MASK   = 0x00000007,
@@ -164,14 +178,67 @@
         NEEDS_AUX                   = 0x00010000,
     };
 
-    struct state_t;
-    struct track_t;
+    // hook types
+    enum {
+        PROCESSTYPE_NORESAMPLEONETRACK, // others set elsewhere
+    };
 
-    typedef void (*hook_t)(track_t* t, int32_t* output, size_t numOutFrames, int32_t* temp,
-                           int32_t* aux);
-    static const int BLOCKSIZE = 16; // 4 cache lines
+    enum {
+        TRACKTYPE_NOP,
+        TRACKTYPE_RESAMPLE,
+        TRACKTYPE_NORESAMPLE,
+        TRACKTYPE_NORESAMPLEMONO,
+    };
 
-    struct track_t {
+    // process hook functionality
+    using process_hook_t = void(AudioMixer::*)();
+
+    struct Track;
+    using hook_t = void(Track::*)(int32_t* output, size_t numOutFrames, int32_t* temp, int32_t* aux);
+
+    struct Track {
+        Track()
+            : bufferProvider(nullptr)
+        {
+            // TODO: move additional initialization here.
+        }
+
+        ~Track()
+        {
+            // bufferProvider, mInputBufferProvider need not be deleted.
+            mResampler.reset(nullptr);
+            // Ensure the order of destruction of buffer providers as they
+            // release the upstream provider in the destructor.
+            mTimestretchBufferProvider.reset(nullptr);
+            mPostDownmixReformatBufferProvider.reset(nullptr);
+            mDownmixerBufferProvider.reset(nullptr);
+            mReformatBufferProvider.reset(nullptr);
+        }
+
+        bool        needsRamp() { return (volumeInc[0] | volumeInc[1] | auxInc) != 0; }
+        bool        setResampler(uint32_t trackSampleRate, uint32_t devSampleRate);
+        bool        doesResample() const { return mResampler.get() != nullptr; }
+        void        resetResampler() { if (mResampler.get() != nullptr) mResampler->reset(); }
+        void        adjustVolumeRamp(bool aux, bool useFloat = false);
+        size_t      getUnreleasedFrames() const { return mResampler.get() != nullptr ?
+                                                    mResampler->getUnreleasedFrames() : 0; };
+
+        status_t    prepareForDownmix();
+        void        unprepareForDownmix();
+        status_t    prepareForReformat();
+        void        unprepareForReformat();
+        bool        setPlaybackRate(const AudioPlaybackRate &playbackRate);
+        void        reconfigureBufferProviders();
+
+        static hook_t getTrackHook(int trackType, uint32_t channelCount,
+                audio_format_t mixerInFormat, audio_format_t mixerOutFormat);
+
+        void track__nop(int32_t* out, size_t numFrames, int32_t* temp, int32_t* aux);
+
+        template <int MIXTYPE, bool USEFLOATVOL, bool ADJUSTVOL,
+            typename TO, typename TI, typename TA>
+        void volumeMix(TO *out, size_t outFrames, const TI *in, TA *aux, bool ramp);
+
         uint32_t    needs;
 
         // TODO: Eventually remove legacy integer volume settings
@@ -181,16 +248,11 @@
         };
 
         int32_t     prevVolume[MAX_NUM_VOLUMES];
-
-        // 16-byte boundary
-
         int32_t     volumeInc[MAX_NUM_VOLUMES];
         int32_t     auxInc;
         int32_t     prevAuxLevel;
-
-        // 16-byte boundary
-
         int16_t     auxLevel;       // 0 <= auxLevel <= MAX_GAIN_INT, but signed for mul performance
+
         uint16_t    frameCount;
 
         uint8_t     channelCount;   // 1 or 2, redundant with (needs & NEEDS_CHANNEL_COUNT__MASK)
@@ -202,22 +264,16 @@
         //  for how the Track buffer provider is wrapped by another one when dowmixing is required
         AudioBufferProvider*                bufferProvider;
 
-        // 16-byte boundary
-
         mutable AudioBufferProvider::Buffer buffer; // 8 bytes
 
         hook_t      hook;
-        const void* in;             // current location in buffer
+        const void  *mIn;             // current location in buffer
 
-        // 16-byte boundary
-
-        AudioResampler*     resampler;
+        std::unique_ptr<AudioResampler> mResampler;
         uint32_t            sampleRate;
         int32_t*           mainBuffer;
         int32_t*           auxBuffer;
 
-        // 16-byte boundary
-
         /* Buffer providers are constructed to translate the track input data as needed.
          *
          * TODO: perhaps make a single PlaybackConverterProvider class to move
@@ -228,17 +284,17 @@
          *    match either mMixerInFormat or mDownmixRequiresFormat, if the downmixer
          *    requires reformat. For example, it may convert floating point input to
          *    PCM_16_bit if that's required by the downmixer.
-         * 3) downmixerBufferProvider: If not NULL, performs the channel remixing to match
+         * 3) mDownmixerBufferProvider: If not NULL, performs the channel remixing to match
          *    the number of channels required by the mixer sink.
          * 4) mPostDownmixReformatBufferProvider: If not NULL, performs reformatting from
          *    the downmixer requirements to the mixer engine input requirements.
          * 5) mTimestretchBufferProvider: Adds timestretching for playback rate
          */
         AudioBufferProvider*     mInputBufferProvider;    // externally provided buffer provider.
-        PassthruBufferProvider*  mReformatBufferProvider; // provider wrapper for reformatting.
-        PassthruBufferProvider*  downmixerBufferProvider; // wrapper for channel conversion.
-        PassthruBufferProvider*  mPostDownmixReformatBufferProvider;
-        PassthruBufferProvider*  mTimestretchBufferProvider;
+        std::unique_ptr<PassthruBufferProvider> mReformatBufferProvider;
+        std::unique_ptr<PassthruBufferProvider> mDownmixerBufferProvider;
+        std::unique_ptr<PassthruBufferProvider> mPostDownmixReformatBufferProvider;
+        std::unique_ptr<PassthruBufferProvider> mTimestretchBufferProvider;
 
         int32_t     sessionId;
 
@@ -263,129 +319,94 @@
 
         AudioPlaybackRate    mPlaybackRate;
 
-        bool        needsRamp() { return (volumeInc[0] | volumeInc[1] | auxInc) != 0; }
-        bool        setResampler(uint32_t trackSampleRate, uint32_t devSampleRate);
-        bool        doesResample() const { return resampler != NULL; }
-        void        resetResampler() { if (resampler != NULL) resampler->reset(); }
-        void        adjustVolumeRamp(bool aux, bool useFloat = false);
-        size_t      getUnreleasedFrames() const { return resampler != NULL ?
-                                                    resampler->getUnreleasedFrames() : 0; };
+    private:
+        // hooks
+        void track__genericResample(int32_t* out, size_t numFrames, int32_t* temp, int32_t* aux);
+        void track__16BitsStereo(int32_t* out, size_t numFrames, int32_t* temp, int32_t* aux);
+        void track__16BitsMono(int32_t* out, size_t numFrames, int32_t* temp, int32_t* aux);
 
-        status_t    prepareForDownmix();
-        void        unprepareForDownmix();
-        status_t    prepareForReformat();
-        void        unprepareForReformat();
-        bool        setPlaybackRate(const AudioPlaybackRate &playbackRate);
-        void        reconfigureBufferProviders();
+        void volumeRampStereo(int32_t* out, size_t frameCount, int32_t* temp, int32_t* aux);
+        void volumeStereo(int32_t* out, size_t frameCount, int32_t* temp, int32_t* aux);
+
+        // multi-format track hooks
+        template <int MIXTYPE, typename TO, typename TI, typename TA>
+        void track__Resample(TO* out, size_t frameCount, TO* temp __unused, TA* aux);
+        template <int MIXTYPE, typename TO, typename TI, typename TA>
+        void track__NoResample(TO* out, size_t frameCount, TO* temp __unused, TA* aux);
     };
 
-    typedef void (*process_hook_t)(state_t* state);
-
-    // pad to 32-bytes to fill cache line
-    struct state_t {
-        uint32_t        enabledTracks;
-        uint32_t        needsChanged;
-        size_t          frameCount;
-        process_hook_t  hook;   // one of process__*, never NULL
-        int32_t         *outputTemp;
-        int32_t         *resampleTemp;
-        NBLog::Writer*  mNBLogWriter;   // associated NBLog::Writer or &mDummyLog
-        int32_t         reserved[1];
-        // FIXME allocate dynamically to save some memory when maxNumTracks < MAX_NUM_TRACKS
-        track_t         tracks[MAX_NUM_TRACKS] __attribute__((aligned(32)));
-    };
-
-    // bitmask of allocated track names, where bit 0 corresponds to TRACK0 etc.
-    uint32_t        mTrackNames;
-
-    // bitmask of configured track names; ~0 if maxNumTracks == MAX_NUM_TRACKS,
-    // but will have fewer bits set if maxNumTracks < MAX_NUM_TRACKS
-    const uint32_t  mConfiguredNames;
-
-    const uint32_t  mSampleRate;
-
-    NBLog::Writer   mDummyLogWriter;
-public:
-    // Called by FastMixer to inform AudioMixer of it's associated NBLog::Writer.
-    // FIXME It would be safer to use TLS for this, so we don't accidentally use wrong one.
-    void            setNBLogWriter(NBLog::Writer* log);
-private:
-    state_t         mState __attribute__((aligned(32)));
-
-    // Call after changing either the enabled status of a track, or parameters of an enabled track.
-    // OK to call more often than that, but unnecessary.
-    void invalidateState(uint32_t mask);
+    // TODO: remove BLOCKSIZE unit of processing - it isn't needed anymore.
+    static constexpr int BLOCKSIZE = 16;
 
     bool setChannelMasks(int name,
             audio_channel_mask_t trackChannelMask, audio_channel_mask_t mixerChannelMask);
 
-    static void track__genericResample(track_t* t, int32_t* out, size_t numFrames, int32_t* temp,
-            int32_t* aux);
-    static void track__nop(track_t* t, int32_t* out, size_t numFrames, int32_t* temp, int32_t* aux);
-    static void track__16BitsStereo(track_t* t, int32_t* out, size_t numFrames, int32_t* temp,
-            int32_t* aux);
-    static void track__16BitsMono(track_t* t, int32_t* out, size_t numFrames, int32_t* temp,
-            int32_t* aux);
-    static void volumeRampStereo(track_t* t, int32_t* out, size_t frameCount, int32_t* temp,
-            int32_t* aux);
-    static void volumeStereo(track_t* t, int32_t* out, size_t frameCount, int32_t* temp,
-            int32_t* aux);
+    // Called when track info changes and a new process hook should be determined.
+    void invalidate() {
+        mHook = &AudioMixer::process__validate;
+    }
 
-    static void process__validate(state_t* state);
-    static void process__nop(state_t* state);
-    static void process__genericNoResampling(state_t* state);
-    static void process__genericResampling(state_t* state);
-    static void process__OneTrack16BitsStereoNoResampling(state_t* state);
+    void process__validate();
+    void process__nop();
+    void process__genericNoResampling();
+    void process__genericResampling();
+    void process__oneTrack16BitsStereoNoResampling();
 
-    static pthread_once_t   sOnceControl;
-    static void             sInitRoutine();
-
-    /* multi-format volume mixing function (calls template functions
-     * in AudioMixerOps.h).  The template parameters are as follows:
-     *
-     *   MIXTYPE     (see AudioMixerOps.h MIXTYPE_* enumeration)
-     *   USEFLOATVOL (set to true if float volume is used)
-     *   ADJUSTVOL   (set to true if volume ramp parameters needs adjustment afterwards)
-     *   TO: int32_t (Q4.27) or float
-     *   TI: int32_t (Q4.27) or int16_t (Q0.15) or float
-     *   TA: int32_t (Q4.27)
-     */
-    template <int MIXTYPE, bool USEFLOATVOL, bool ADJUSTVOL,
-        typename TO, typename TI, typename TA>
-    static void volumeMix(TO *out, size_t outFrames,
-            const TI *in, TA *aux, bool ramp, AudioMixer::track_t *t);
-
-    // multi-format process hooks
     template <int MIXTYPE, typename TO, typename TI, typename TA>
-    static void process_NoResampleOneTrack(state_t* state);
+    void process__noResampleOneTrack();
 
-    // multi-format track hooks
-    template <int MIXTYPE, typename TO, typename TI, typename TA>
-    static void track__Resample(track_t* t, TO* out, size_t frameCount,
-            TO* temp __unused, TA* aux);
-    template <int MIXTYPE, typename TO, typename TI, typename TA>
-    static void track__NoResample(track_t* t, TO* out, size_t frameCount,
-            TO* temp __unused, TA* aux);
+    static process_hook_t getProcessHook(int processType, uint32_t channelCount,
+            audio_format_t mixerInFormat, audio_format_t mixerOutFormat);
 
     static void convertMixerFormat(void *out, audio_format_t mixerOutFormat,
             void *in, audio_format_t mixerInFormat, size_t sampleCount);
 
-    // hook types
-    enum {
-        PROCESSTYPE_NORESAMPLEONETRACK,
-    };
-    enum {
-        TRACKTYPE_NOP,
-        TRACKTYPE_RESAMPLE,
-        TRACKTYPE_NORESAMPLE,
-        TRACKTYPE_NORESAMPLEMONO,
-    };
+    static inline bool isValidPcmTrackFormat(audio_format_t format) {
+        switch (format) {
+        case AUDIO_FORMAT_PCM_8_BIT:
+        case AUDIO_FORMAT_PCM_16_BIT:
+        case AUDIO_FORMAT_PCM_24_BIT_PACKED:
+        case AUDIO_FORMAT_PCM_32_BIT:
+        case AUDIO_FORMAT_PCM_FLOAT:
+            return true;
+        default:
+            return false;
+        }
+    }
 
-    // functions for determining the proper process and track hooks.
-    static process_hook_t getProcessHook(int processType, uint32_t channelCount,
-            audio_format_t mixerInFormat, audio_format_t mixerOutFormat);
-    static hook_t getTrackHook(int trackType, uint32_t channelCount,
-            audio_format_t mixerInFormat, audio_format_t mixerOutFormat);
+    static void sInitRoutine();
+
+    // initialization constants
+    const int mMaxNumTracks;
+    const uint32_t mSampleRate;
+    const size_t mFrameCount;
+
+    NBLog::Writer *mNBLogWriter = nullptr;   // associated NBLog::Writer
+
+    process_hook_t mHook = &AudioMixer::process__nop;   // one of process__*, never nullptr
+
+    // the size of the type (int32_t) should be the largest of all types supported
+    // by the mixer.
+    std::unique_ptr<int32_t[]> mOutputTemp;
+    std::unique_ptr<int32_t[]> mResampleTemp;
+
+    // fast lookup of previously deleted track names for reuse.
+    // the AudioMixer tries to return the smallest unused name -
+    // this is an arbitrary decision (actually any non-negative
+    // integer that isn't in mTracks could be used).
+    std::set<int /* name */> mUnusedNames;    // set of unused track names (may be empty)
+
+    // track names grouped by main buffer, in no particular order of main buffer.
+    // however names for a particular main buffer are in order (by construction).
+    std::unordered_map<void * /* mainBuffer */, std::vector<int /* name */>> mGroups;
+
+    // track names that are enabled, in increasing order (by construction).
+    std::vector<int /* name */> mEnabled;
+
+    // track smart pointers, by name, in increasing order of name.
+    std::map<int /* name */, std::shared_ptr<Track>> mTracks;
+
+    static pthread_once_t sOnceControl; // initialized in constructor by first new
 };
 
 // ----------------------------------------------------------------------------
diff --git a/media/libaudioclient/include/media/AudioSystem.h b/media/libaudioclient/include/media/AudioSystem.h
index f7c3d03..52dcfaa 100644
--- a/media/libaudioclient/include/media/AudioSystem.h
+++ b/media/libaudioclient/include/media/AudioSystem.h
@@ -239,20 +239,16 @@
                                     audio_session_t session,
                                     pid_t pid,
                                     uid_t uid,
+                                    const String16& opPackageName,
                                     const audio_config_base_t *config,
                                     audio_input_flags_t flags,
                                     audio_port_handle_t *selectedDeviceId,
                                     audio_port_handle_t *portId);
 
-    static status_t startInput(audio_io_handle_t input,
-                               audio_session_t session,
-                               audio_devices_t device,
-                               uid_t uid,
+    static status_t startInput(audio_port_handle_t portId,
                                bool *silenced);
-    static status_t stopInput(audio_io_handle_t input,
-                              audio_session_t session);
-    static void releaseInput(audio_io_handle_t input,
-                             audio_session_t session);
+    static status_t stopInput(audio_port_handle_t portId);
+    static void releaseInput(audio_port_handle_t portId);
     static status_t initStreamVolume(audio_stream_type_t stream,
                                       int indexMin,
                                       int indexMax);
diff --git a/media/libaudioclient/include/media/IAudioPolicyService.h b/media/libaudioclient/include/media/IAudioPolicyService.h
index 5338927..949d593 100644
--- a/media/libaudioclient/include/media/IAudioPolicyService.h
+++ b/media/libaudioclient/include/media/IAudioPolicyService.h
@@ -80,19 +80,15 @@
                               audio_session_t session,
                               pid_t pid,
                               uid_t uid,
+                              const String16& opPackageName,
                               const audio_config_base_t *config,
                               audio_input_flags_t flags,
                               audio_port_handle_t *selectedDeviceId,
                               audio_port_handle_t *portId) = 0;
-    virtual status_t startInput(audio_io_handle_t input,
-                                audio_session_t session,
-                                audio_devices_t device,
-                                uid_t uid,
+    virtual status_t startInput(audio_port_handle_t portId,
                                 bool *silenced) = 0;
-    virtual status_t stopInput(audio_io_handle_t input,
-                               audio_session_t session) = 0;
-    virtual void releaseInput(audio_io_handle_t input,
-                              audio_session_t session) = 0;
+    virtual status_t stopInput(audio_port_handle_t portId) = 0;
+    virtual void releaseInput(audio_port_handle_t portId) = 0;
     virtual status_t initStreamVolume(audio_stream_type_t stream,
                                       int indexMin,
                                       int indexMax) = 0;
diff --git a/media/libaudioprocessing/AudioMixer.cpp b/media/libaudioprocessing/AudioMixer.cpp
index 5fafb8a..f1daeb4 100644
--- a/media/libaudioprocessing/AudioMixer.cpp
+++ b/media/libaudioprocessing/AudioMixer.cpp
@@ -62,13 +62,6 @@
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
 #endif
 
-// TODO: Move these macro/inlines to a header file.
-template <typename T>
-static inline
-T max(const T& x, const T& y) {
-    return x > y ? x : y;
-}
-
 // Set kUseNewMixer to true to use the new mixer engine always. Otherwise the
 // original code will be used for stereo sinks, the new mixer for multichannel.
 static constexpr bool kUseNewMixer = true;
@@ -93,88 +86,41 @@
 
 // ----------------------------------------------------------------------------
 
-template <typename T>
-T min(const T& a, const T& b)
-{
-    return a < b ? a : b;
-}
-
-// ----------------------------------------------------------------------------
-
-// Ensure mConfiguredNames bitmask is initialized properly on all architectures.
-// The value of 1 << x is undefined in C when x >= 32.
-
-AudioMixer::AudioMixer(size_t frameCount, uint32_t sampleRate, uint32_t maxNumTracks)
-    :   mTrackNames(0), mConfiguredNames((maxNumTracks >= 32 ? 0 : 1 << maxNumTracks) - 1),
-        mSampleRate(sampleRate)
-{
-    ALOG_ASSERT(maxNumTracks <= MAX_NUM_TRACKS, "maxNumTracks %u > MAX_NUM_TRACKS %u",
-            maxNumTracks, MAX_NUM_TRACKS);
-
-    // AudioMixer is not yet capable of more than 32 active track inputs
-    ALOG_ASSERT(32 >= MAX_NUM_TRACKS, "bad MAX_NUM_TRACKS %d", MAX_NUM_TRACKS);
-
-    pthread_once(&sOnceControl, &sInitRoutine);
-
-    mState.enabledTracks= 0;
-    mState.needsChanged = 0;
-    mState.frameCount   = frameCount;
-    mState.hook         = process__nop;
-    mState.outputTemp   = NULL;
-    mState.resampleTemp = NULL;
-    mState.mNBLogWriter = &mDummyLogWriter;
-    // mState.reserved
-
-    // FIXME Most of the following initialization is probably redundant since
-    // tracks[i] should only be referenced if (mTrackNames & (1 << i)) != 0
-    // and mTrackNames is initially 0.  However, leave it here until that's verified.
-    track_t* t = mState.tracks;
-    for (unsigned i=0 ; i < MAX_NUM_TRACKS ; i++) {
-        t->resampler = NULL;
-        t->downmixerBufferProvider = NULL;
-        t->mReformatBufferProvider = NULL;
-        t->mTimestretchBufferProvider = NULL;
-        t++;
-    }
-
-}
-
-AudioMixer::~AudioMixer()
-{
-    track_t* t = mState.tracks;
-    for (unsigned i=0 ; i < MAX_NUM_TRACKS ; i++) {
-        delete t->resampler;
-        delete t->downmixerBufferProvider;
-        delete t->mReformatBufferProvider;
-        delete t->mTimestretchBufferProvider;
-        t++;
-    }
-    delete [] mState.outputTemp;
-    delete [] mState.resampleTemp;
-}
-
-void AudioMixer::setNBLogWriter(NBLog::Writer *logWriter)
-{
-    mState.mNBLogWriter = logWriter;
-}
-
 static inline audio_format_t selectMixerInFormat(audio_format_t inputFormat __unused) {
     return kUseFloat && kUseNewMixer ? AUDIO_FORMAT_PCM_FLOAT : AUDIO_FORMAT_PCM_16_BIT;
 }
 
-int AudioMixer::getTrackName(audio_channel_mask_t channelMask,
-        audio_format_t format, int sessionId)
+int AudioMixer::getTrackName(
+        audio_channel_mask_t channelMask, audio_format_t format, int sessionId)
 {
     if (!isValidPcmTrackFormat(format)) {
         ALOGE("AudioMixer::getTrackName invalid format (%#x)", format);
         return -1;
     }
-    uint32_t names = (~mTrackNames) & mConfiguredNames;
-    if (names != 0) {
-        int n = __builtin_ctz(names);
-        ALOGV("add track (%d)", n);
+    if (mTracks.size() >= (size_t)mMaxNumTracks) {
+        ALOGE("%s: out of track names (max = %d)", __func__, mMaxNumTracks);
+        return -1;
+    }
+
+    // get a new name for the track.
+    int name;
+    if (mUnusedNames.size() != 0) {
+        // reuse first name for deleted track.
+        auto it = mUnusedNames.begin();
+        name = *it;
+        (void)mUnusedNames.erase(it);
+    } else {
+        // we're fully populated, so create a new name.
+        name = mTracks.size();
+    }
+    ALOGV("add track (%d)", name);
+
+    auto t = std::make_shared<Track>();
+    mTracks[name] = t;
+
+    {
+        // TODO: move initialization to the Track constructor.
         // assume default parameters for the track, except where noted below
-        track_t* t = &mState.tracks[n];
         t->needs = 0;
 
         // Integer volume.
@@ -215,17 +161,12 @@
         // no initialization needed
         // t->buffer.frameCount
         t->hook = NULL;
-        t->in = NULL;
-        t->resampler = NULL;
+        t->mIn = NULL;
         t->sampleRate = mSampleRate;
         // setParameter(name, TRACK, MAIN_BUFFER, mixBuffer) is required before enable(name)
         t->mainBuffer = NULL;
         t->auxBuffer = NULL;
         t->mInputBufferProvider = NULL;
-        t->mReformatBufferProvider = NULL;
-        t->downmixerBufferProvider = NULL;
-        t->mPostDownmixReformatBufferProvider = NULL;
-        t->mTimestretchBufferProvider = NULL;
         t->mMixerFormat = AUDIO_FORMAT_PCM_16_BIT;
         t->mFormat = format;
         t->mMixerInFormat = selectMixerInFormat(format);
@@ -243,91 +184,78 @@
         // prepareForDownmix() may change mDownmixRequiresFormat
         ALOGVV("mMixerFormat:%#x  mMixerInFormat:%#x\n", t->mMixerFormat, t->mMixerInFormat);
         t->prepareForReformat();
-        mTrackNames |= 1 << n;
-        return TRACK0 + n;
+        return TRACK0 + name;
     }
-    ALOGE("AudioMixer::getTrackName out of available tracks");
-    return -1;
 }
 
-void AudioMixer::invalidateState(uint32_t mask)
-{
-    if (mask != 0) {
-        mState.needsChanged |= mask;
-        mState.hook = process__validate;
-    }
- }
-
 // Called when channel masks have changed for a track name
 // TODO: Fix DownmixerBufferProvider not to (possibly) change mixer input format,
 // which will simplify this logic.
 bool AudioMixer::setChannelMasks(int name,
         audio_channel_mask_t trackChannelMask, audio_channel_mask_t mixerChannelMask) {
-    track_t &track = mState.tracks[name];
+    LOG_ALWAYS_FATAL_IF(mTracks.find(name) == mTracks.end(), "invalid name: %d", name);
+    const std::shared_ptr<Track> &track = mTracks[name];
 
-    if (trackChannelMask == track.channelMask
-            && mixerChannelMask == track.mMixerChannelMask) {
+    if (trackChannelMask == track->channelMask
+            && mixerChannelMask == track->mMixerChannelMask) {
         return false;  // no need to change
     }
     // always recompute for both channel masks even if only one has changed.
     const uint32_t trackChannelCount = audio_channel_count_from_out_mask(trackChannelMask);
     const uint32_t mixerChannelCount = audio_channel_count_from_out_mask(mixerChannelMask);
-    const bool mixerChannelCountChanged = track.mMixerChannelCount != mixerChannelCount;
+    const bool mixerChannelCountChanged = track->mMixerChannelCount != mixerChannelCount;
 
     ALOG_ASSERT((trackChannelCount <= MAX_NUM_CHANNELS_TO_DOWNMIX)
             && trackChannelCount
             && mixerChannelCount);
-    track.channelMask = trackChannelMask;
-    track.channelCount = trackChannelCount;
-    track.mMixerChannelMask = mixerChannelMask;
-    track.mMixerChannelCount = mixerChannelCount;
+    track->channelMask = trackChannelMask;
+    track->channelCount = trackChannelCount;
+    track->mMixerChannelMask = mixerChannelMask;
+    track->mMixerChannelCount = mixerChannelCount;
 
     // channel masks have changed, does this track need a downmixer?
     // update to try using our desired format (if we aren't already using it)
-    const audio_format_t prevDownmixerFormat = track.mDownmixRequiresFormat;
-    const status_t status = mState.tracks[name].prepareForDownmix();
+    const audio_format_t prevDownmixerFormat = track->mDownmixRequiresFormat;
+    const status_t status = track->prepareForDownmix();
     ALOGE_IF(status != OK,
             "prepareForDownmix error %d, track channel mask %#x, mixer channel mask %#x",
-            status, track.channelMask, track.mMixerChannelMask);
+            status, track->channelMask, track->mMixerChannelMask);
 
-    if (prevDownmixerFormat != track.mDownmixRequiresFormat) {
-        track.prepareForReformat(); // because of downmixer, track format may change!
+    if (prevDownmixerFormat != track->mDownmixRequiresFormat) {
+        track->prepareForReformat(); // because of downmixer, track format may change!
     }
 
-    if (track.resampler && mixerChannelCountChanged) {
+    if (track->mResampler.get() != nullptr && mixerChannelCountChanged) {
         // resampler channels may have changed.
-        const uint32_t resetToSampleRate = track.sampleRate;
-        delete track.resampler;
-        track.resampler = NULL;
-        track.sampleRate = mSampleRate; // without resampler, track rate is device sample rate.
+        const uint32_t resetToSampleRate = track->sampleRate;
+        track->mResampler.reset(nullptr);
+        track->sampleRate = mSampleRate; // without resampler, track rate is device sample rate.
         // recreate the resampler with updated format, channels, saved sampleRate.
-        track.setResampler(resetToSampleRate /*trackSampleRate*/, mSampleRate /*devSampleRate*/);
+        track->setResampler(resetToSampleRate /*trackSampleRate*/, mSampleRate /*devSampleRate*/);
     }
     return true;
 }
 
-void AudioMixer::track_t::unprepareForDownmix() {
+void AudioMixer::Track::unprepareForDownmix() {
     ALOGV("AudioMixer::unprepareForDownmix(%p)", this);
 
-    if (mPostDownmixReformatBufferProvider != nullptr) {
+    if (mPostDownmixReformatBufferProvider.get() != nullptr) {
         // release any buffers held by the mPostDownmixReformatBufferProvider
-        // before deallocating the downmixerBufferProvider.
+        // before deallocating the mDownmixerBufferProvider.
         mPostDownmixReformatBufferProvider->reset();
     }
 
     mDownmixRequiresFormat = AUDIO_FORMAT_INVALID;
-    if (downmixerBufferProvider != NULL) {
+    if (mDownmixerBufferProvider.get() != nullptr) {
         // this track had previously been configured with a downmixer, delete it
-        ALOGV(" deleting old downmixer");
-        delete downmixerBufferProvider;
-        downmixerBufferProvider = NULL;
+        mDownmixerBufferProvider.reset(nullptr);
         reconfigureBufferProviders();
     } else {
         ALOGV(" nothing to do, no downmixer to delete");
     }
 }
 
-status_t AudioMixer::track_t::prepareForDownmix()
+status_t AudioMixer::Track::prepareForDownmix()
 {
     ALOGV("AudioMixer::prepareForDownmix(%p) with mask 0x%x",
             this, channelMask);
@@ -345,40 +273,35 @@
     if (audio_channel_mask_get_representation(channelMask)
                 == AUDIO_CHANNEL_REPRESENTATION_POSITION
             && DownmixerBufferProvider::isMultichannelCapable()) {
-        DownmixerBufferProvider* pDbp = new DownmixerBufferProvider(channelMask,
+        mDownmixerBufferProvider.reset(new DownmixerBufferProvider(channelMask,
                 mMixerChannelMask,
                 AUDIO_FORMAT_PCM_16_BIT /* TODO: use mMixerInFormat, now only PCM 16 */,
-                sampleRate, sessionId, kCopyBufferFrameCount);
-
-        if (pDbp->isValid()) { // if constructor completed properly
+                sampleRate, sessionId, kCopyBufferFrameCount));
+        if (static_cast<DownmixerBufferProvider *>(mDownmixerBufferProvider.get())->isValid()) {
             mDownmixRequiresFormat = AUDIO_FORMAT_PCM_16_BIT; // PCM 16 bit required for downmix
-            downmixerBufferProvider = pDbp;
             reconfigureBufferProviders();
             return NO_ERROR;
         }
-        delete pDbp;
+        // mDownmixerBufferProvider reset below.
     }
 
     // Effect downmixer does not accept the channel conversion.  Let's use our remixer.
-    RemixBufferProvider* pRbp = new RemixBufferProvider(channelMask,
-            mMixerChannelMask, mMixerInFormat, kCopyBufferFrameCount);
+    mDownmixerBufferProvider.reset(new RemixBufferProvider(channelMask,
+            mMixerChannelMask, mMixerInFormat, kCopyBufferFrameCount));
     // Remix always finds a conversion whereas Downmixer effect above may fail.
-    downmixerBufferProvider = pRbp;
     reconfigureBufferProviders();
     return NO_ERROR;
 }
 
-void AudioMixer::track_t::unprepareForReformat() {
+void AudioMixer::Track::unprepareForReformat() {
     ALOGV("AudioMixer::unprepareForReformat(%p)", this);
     bool requiresReconfigure = false;
-    if (mReformatBufferProvider != NULL) {
-        delete mReformatBufferProvider;
-        mReformatBufferProvider = NULL;
+    if (mReformatBufferProvider.get() != nullptr) {
+        mReformatBufferProvider.reset(nullptr);
         requiresReconfigure = true;
     }
-    if (mPostDownmixReformatBufferProvider != NULL) {
-        delete mPostDownmixReformatBufferProvider;
-        mPostDownmixReformatBufferProvider = NULL;
+    if (mPostDownmixReformatBufferProvider.get() != nullptr) {
+        mPostDownmixReformatBufferProvider.reset(nullptr);
         requiresReconfigure = true;
     }
     if (requiresReconfigure) {
@@ -386,7 +309,7 @@
     }
 }
 
-status_t AudioMixer::track_t::prepareForReformat()
+status_t AudioMixer::Track::prepareForReformat()
 {
     ALOGV("AudioMixer::prepareForReformat(%p) with format %#x", this, mFormat);
     // discard previous reformatters
@@ -396,19 +319,19 @@
             ? mDownmixRequiresFormat : mMixerInFormat;
     bool requiresReconfigure = false;
     if (mFormat != targetFormat) {
-        mReformatBufferProvider = new ReformatBufferProvider(
+        mReformatBufferProvider.reset(new ReformatBufferProvider(
                 audio_channel_count_from_out_mask(channelMask),
                 mFormat,
                 targetFormat,
-                kCopyBufferFrameCount);
+                kCopyBufferFrameCount));
         requiresReconfigure = true;
     }
     if (targetFormat != mMixerInFormat) {
-        mPostDownmixReformatBufferProvider = new ReformatBufferProvider(
+        mPostDownmixReformatBufferProvider.reset(new ReformatBufferProvider(
                 audio_channel_count_from_out_mask(mMixerChannelMask),
                 targetFormat,
                 mMixerInFormat,
-                kCopyBufferFrameCount);
+                kCopyBufferFrameCount));
         requiresReconfigure = true;
     }
     if (requiresReconfigure) {
@@ -417,74 +340,63 @@
     return NO_ERROR;
 }
 
-void AudioMixer::track_t::reconfigureBufferProviders()
+void AudioMixer::Track::reconfigureBufferProviders()
 {
     bufferProvider = mInputBufferProvider;
-    if (mReformatBufferProvider) {
+    if (mReformatBufferProvider.get() != nullptr) {
         mReformatBufferProvider->setBufferProvider(bufferProvider);
-        bufferProvider = mReformatBufferProvider;
+        bufferProvider = mReformatBufferProvider.get();
     }
-    if (downmixerBufferProvider) {
-        downmixerBufferProvider->setBufferProvider(bufferProvider);
-        bufferProvider = downmixerBufferProvider;
+    if (mDownmixerBufferProvider.get() != nullptr) {
+        mDownmixerBufferProvider->setBufferProvider(bufferProvider);
+        bufferProvider = mDownmixerBufferProvider.get();
     }
-    if (mPostDownmixReformatBufferProvider) {
+    if (mPostDownmixReformatBufferProvider.get() != nullptr) {
         mPostDownmixReformatBufferProvider->setBufferProvider(bufferProvider);
-        bufferProvider = mPostDownmixReformatBufferProvider;
+        bufferProvider = mPostDownmixReformatBufferProvider.get();
     }
-    if (mTimestretchBufferProvider) {
+    if (mTimestretchBufferProvider.get() != nullptr) {
         mTimestretchBufferProvider->setBufferProvider(bufferProvider);
-        bufferProvider = mTimestretchBufferProvider;
+        bufferProvider = mTimestretchBufferProvider.get();
     }
 }
 
 void AudioMixer::deleteTrackName(int name)
 {
-    ALOGV("AudioMixer::deleteTrackName(%d)", name);
     name -= TRACK0;
-    LOG_ALWAYS_FATAL_IF(name < 0 || name >= (int)MAX_NUM_TRACKS, "bad track name %d", name);
+    LOG_ALWAYS_FATAL_IF(mTracks.find(name) == mTracks.end(), "invalid name: %d", name);
     ALOGV("deleteTrackName(%d)", name);
-    track_t& track(mState.tracks[ name ]);
-    if (track.enabled) {
-        track.enabled = false;
-        invalidateState(1<<name);
+
+    if (mTracks[name]->enabled) {
+        invalidate();
     }
-    // delete the resampler
-    delete track.resampler;
-    track.resampler = NULL;
-    // delete the downmixer
-    mState.tracks[name].unprepareForDownmix();
-    // delete the reformatter
-    mState.tracks[name].unprepareForReformat();
-    // delete the timestretch provider
-    delete track.mTimestretchBufferProvider;
-    track.mTimestretchBufferProvider = NULL;
-    mTrackNames &= ~(1<<name);
+    mTracks.erase(name); // deallocate track
+    mUnusedNames.emplace(name); // recycle name
 }
 
 void AudioMixer::enable(int name)
 {
     name -= TRACK0;
-    ALOG_ASSERT(uint32_t(name) < MAX_NUM_TRACKS, "bad track name %d", name);
-    track_t& track = mState.tracks[name];
+    LOG_ALWAYS_FATAL_IF(mTracks.find(name) == mTracks.end(), "invalid name: %d", name);
+    const std::shared_ptr<Track> &track = mTracks[name];
 
-    if (!track.enabled) {
-        track.enabled = true;
+    if (!track->enabled) {
+        track->enabled = true;
         ALOGV("enable(%d)", name);
-        invalidateState(1 << name);
+        invalidate();
     }
 }
 
 void AudioMixer::disable(int name)
 {
     name -= TRACK0;
-    ALOG_ASSERT(uint32_t(name) < MAX_NUM_TRACKS, "bad track name %d", name);
-    track_t& track = mState.tracks[name];
+    LOG_ALWAYS_FATAL_IF(mTracks.find(name) == mTracks.end(), "invalid name: %d", name);
+    const std::shared_ptr<Track> &track = mTracks[name];
 
-    if (track.enabled) {
-        track.enabled = false;
+    if (track->enabled) {
+        track->enabled = false;
         ALOGV("disable(%d)", name);
-        invalidateState(1 << name);
+        invalidate();
     }
 }
 
@@ -562,7 +474,8 @@
         ALOGD_IF(*pPrevVolume != *pSetVolume, "previous float ramp hasn't finished,"
                 " prev:%f  set_to:%f", *pPrevVolume, *pSetVolume);
         const float inc = (newVolume - *pPrevVolume) / ramp; // could be inf, nan, subnormal
-        const float maxv = max(newVolume, *pPrevVolume); // could be inf, cannot be nan, subnormal
+        // could be inf, cannot be nan, subnormal
+        const float maxv = std::max(newVolume, *pPrevVolume);
 
         if (isnormal(inc) // inc must be a normal number (no subnormals, infinite, nan)
                 && maxv + inc != maxv) { // inc must make forward progress
@@ -616,8 +529,8 @@
 void AudioMixer::setParameter(int name, int target, int param, void *value)
 {
     name -= TRACK0;
-    ALOG_ASSERT(uint32_t(name) < MAX_NUM_TRACKS, "bad track name %d", name);
-    track_t& track = mState.tracks[name];
+    LOG_ALWAYS_FATAL_IF(mTracks.find(name) == mTracks.end(), "invalid name: %d", name);
+    const std::shared_ptr<Track> &track = mTracks[name];
 
     int valueInt = static_cast<int>(reinterpret_cast<uintptr_t>(value));
     int32_t *valueBuf = reinterpret_cast<int32_t*>(value);
@@ -629,33 +542,33 @@
         case CHANNEL_MASK: {
             const audio_channel_mask_t trackChannelMask =
                 static_cast<audio_channel_mask_t>(valueInt);
-            if (setChannelMasks(name, trackChannelMask, track.mMixerChannelMask)) {
+            if (setChannelMasks(name, trackChannelMask, track->mMixerChannelMask)) {
                 ALOGV("setParameter(TRACK, CHANNEL_MASK, %x)", trackChannelMask);
-                invalidateState(1 << name);
+                invalidate();
             }
             } break;
         case MAIN_BUFFER:
-            if (track.mainBuffer != valueBuf) {
-                track.mainBuffer = valueBuf;
+            if (track->mainBuffer != valueBuf) {
+                track->mainBuffer = valueBuf;
                 ALOGV("setParameter(TRACK, MAIN_BUFFER, %p)", valueBuf);
-                invalidateState(1 << name);
+                invalidate();
             }
             break;
         case AUX_BUFFER:
-            if (track.auxBuffer != valueBuf) {
-                track.auxBuffer = valueBuf;
+            if (track->auxBuffer != valueBuf) {
+                track->auxBuffer = valueBuf;
                 ALOGV("setParameter(TRACK, AUX_BUFFER, %p)", valueBuf);
-                invalidateState(1 << name);
+                invalidate();
             }
             break;
         case FORMAT: {
             audio_format_t format = static_cast<audio_format_t>(valueInt);
-            if (track.mFormat != format) {
+            if (track->mFormat != format) {
                 ALOG_ASSERT(audio_is_linear_pcm(format), "Invalid format %#x", format);
-                track.mFormat = format;
+                track->mFormat = format;
                 ALOGV("setParameter(TRACK, FORMAT, %#x)", format);
-                track.prepareForReformat();
-                invalidateState(1 << name);
+                track->prepareForReformat();
+                invalidate();
             }
             } break;
         // FIXME do we want to support setting the downmix type from AudioFlinger?
@@ -664,17 +577,17 @@
             break          */
         case MIXER_FORMAT: {
             audio_format_t format = static_cast<audio_format_t>(valueInt);
-            if (track.mMixerFormat != format) {
-                track.mMixerFormat = format;
+            if (track->mMixerFormat != format) {
+                track->mMixerFormat = format;
                 ALOGV("setParameter(TRACK, MIXER_FORMAT, %#x)", format);
             }
             } break;
         case MIXER_CHANNEL_MASK: {
             const audio_channel_mask_t mixerChannelMask =
                     static_cast<audio_channel_mask_t>(valueInt);
-            if (setChannelMasks(name, track.channelMask, mixerChannelMask)) {
+            if (setChannelMasks(name, track->channelMask, mixerChannelMask)) {
                 ALOGV("setParameter(TRACK, MIXER_CHANNEL_MASK, %#x)", mixerChannelMask);
-                invalidateState(1 << name);
+                invalidate();
             }
             } break;
         default:
@@ -686,21 +599,20 @@
         switch (param) {
         case SAMPLE_RATE:
             ALOG_ASSERT(valueInt > 0, "bad sample rate %d", valueInt);
-            if (track.setResampler(uint32_t(valueInt), mSampleRate)) {
+            if (track->setResampler(uint32_t(valueInt), mSampleRate)) {
                 ALOGV("setParameter(RESAMPLE, SAMPLE_RATE, %u)",
                         uint32_t(valueInt));
-                invalidateState(1 << name);
+                invalidate();
             }
             break;
         case RESET:
-            track.resetResampler();
-            invalidateState(1 << name);
+            track->resetResampler();
+            invalidate();
             break;
         case REMOVE:
-            delete track.resampler;
-            track.resampler = NULL;
-            track.sampleRate = mSampleRate;
-            invalidateState(1 << name);
+            track->mResampler.reset(nullptr);
+            track->sampleRate = mSampleRate;
+            invalidate();
             break;
         default:
             LOG_ALWAYS_FATAL("setParameter resample: bad param %d", param);
@@ -712,26 +624,28 @@
         switch (param) {
         case AUXLEVEL:
             if (setVolumeRampVariables(*reinterpret_cast<float*>(value),
-                    target == RAMP_VOLUME ? mState.frameCount : 0,
-                    &track.auxLevel, &track.prevAuxLevel, &track.auxInc,
-                    &track.mAuxLevel, &track.mPrevAuxLevel, &track.mAuxInc)) {
+                    target == RAMP_VOLUME ? mFrameCount : 0,
+                    &track->auxLevel, &track->prevAuxLevel, &track->auxInc,
+                    &track->mAuxLevel, &track->mPrevAuxLevel, &track->mAuxInc)) {
                 ALOGV("setParameter(%s, AUXLEVEL: %04x)",
-                        target == VOLUME ? "VOLUME" : "RAMP_VOLUME", track.auxLevel);
-                invalidateState(1 << name);
+                        target == VOLUME ? "VOLUME" : "RAMP_VOLUME", track->auxLevel);
+                invalidate();
             }
             break;
         default:
             if ((unsigned)param >= VOLUME0 && (unsigned)param < VOLUME0 + MAX_NUM_VOLUMES) {
                 if (setVolumeRampVariables(*reinterpret_cast<float*>(value),
-                        target == RAMP_VOLUME ? mState.frameCount : 0,
-                        &track.volume[param - VOLUME0], &track.prevVolume[param - VOLUME0],
-                        &track.volumeInc[param - VOLUME0],
-                        &track.mVolume[param - VOLUME0], &track.mPrevVolume[param - VOLUME0],
-                        &track.mVolumeInc[param - VOLUME0])) {
+                        target == RAMP_VOLUME ? mFrameCount : 0,
+                        &track->volume[param - VOLUME0],
+                        &track->prevVolume[param - VOLUME0],
+                        &track->volumeInc[param - VOLUME0],
+                        &track->mVolume[param - VOLUME0],
+                        &track->mPrevVolume[param - VOLUME0],
+                        &track->mVolumeInc[param - VOLUME0])) {
                     ALOGV("setParameter(%s, VOLUME%d: %04x)",
                             target == VOLUME ? "VOLUME" : "RAMP_VOLUME", param - VOLUME0,
-                                    track.volume[param - VOLUME0]);
-                    invalidateState(1 << name);
+                                    track->volume[param - VOLUME0]);
+                    invalidate();
                 }
             } else {
                 LOG_ALWAYS_FATAL("setParameter volume: bad param %d", param);
@@ -744,16 +658,16 @@
                 const AudioPlaybackRate *playbackRate =
                         reinterpret_cast<AudioPlaybackRate*>(value);
                 ALOGW_IF(!isAudioPlaybackRateValid(*playbackRate),
-                        "bad parameters speed %f, pitch %f",playbackRate->mSpeed,
-                        playbackRate->mPitch);
-                if (track.setPlaybackRate(*playbackRate)) {
+                        "bad parameters speed %f, pitch %f",
+                        playbackRate->mSpeed, playbackRate->mPitch);
+                if (track->setPlaybackRate(*playbackRate)) {
                     ALOGV("setParameter(TIMESTRETCH, PLAYBACK_RATE, STRETCH_MODE, FALLBACK_MODE "
                             "%f %f %d %d",
                             playbackRate->mSpeed,
                             playbackRate->mPitch,
                             playbackRate->mStretchMode,
                             playbackRate->mFallbackMode);
-                    // invalidateState(1 << name);
+                    // invalidate();  (should not require reconfigure)
                 }
             } break;
             default:
@@ -766,12 +680,12 @@
     }
 }
 
-bool AudioMixer::track_t::setResampler(uint32_t trackSampleRate, uint32_t devSampleRate)
+bool AudioMixer::Track::setResampler(uint32_t trackSampleRate, uint32_t devSampleRate)
 {
-    if (trackSampleRate != devSampleRate || resampler != NULL) {
+    if (trackSampleRate != devSampleRate || mResampler.get() != nullptr) {
         if (sampleRate != trackSampleRate) {
             sampleRate = trackSampleRate;
-            if (resampler == NULL) {
+            if (mResampler.get() == nullptr) {
                 ALOGV("Creating resampler from track %d Hz to device %d Hz",
                         trackSampleRate, devSampleRate);
                 AudioResampler::src_quality quality;
@@ -787,15 +701,15 @@
 
                 // TODO: Remove MONO_HACK. Resampler sees #channels after the downmixer
                 // but if none exists, it is the channel count (1 for mono).
-                const int resamplerChannelCount = downmixerBufferProvider != NULL
+                const int resamplerChannelCount = mDownmixerBufferProvider.get() != nullptr
                         ? mMixerChannelCount : channelCount;
                 ALOGVV("Creating resampler:"
                         " format(%#x) channels(%d) devSampleRate(%u) quality(%d)\n",
                         mMixerInFormat, resamplerChannelCount, devSampleRate, quality);
-                resampler = AudioResampler::create(
+                mResampler.reset(AudioResampler::create(
                         mMixerInFormat,
                         resamplerChannelCount,
-                        devSampleRate, quality);
+                        devSampleRate, quality));
             }
             return true;
         }
@@ -803,25 +717,25 @@
     return false;
 }
 
-bool AudioMixer::track_t::setPlaybackRate(const AudioPlaybackRate &playbackRate)
+bool AudioMixer::Track::setPlaybackRate(const AudioPlaybackRate &playbackRate)
 {
-    if ((mTimestretchBufferProvider == NULL &&
+    if ((mTimestretchBufferProvider.get() == nullptr &&
             fabs(playbackRate.mSpeed - mPlaybackRate.mSpeed) < AUDIO_TIMESTRETCH_SPEED_MIN_DELTA &&
             fabs(playbackRate.mPitch - mPlaybackRate.mPitch) < AUDIO_TIMESTRETCH_PITCH_MIN_DELTA) ||
             isAudioPlaybackRateEqual(playbackRate, mPlaybackRate)) {
         return false;
     }
     mPlaybackRate = playbackRate;
-    if (mTimestretchBufferProvider == NULL) {
+    if (mTimestretchBufferProvider.get() == nullptr) {
         // TODO: Remove MONO_HACK. Resampler sees #channels after the downmixer
         // but if none exists, it is the channel count (1 for mono).
-        const int timestretchChannelCount = downmixerBufferProvider != NULL
+        const int timestretchChannelCount = mDownmixerBufferProvider.get() != nullptr
                 ? mMixerChannelCount : channelCount;
-        mTimestretchBufferProvider = new TimestretchBufferProvider(timestretchChannelCount,
-                mMixerInFormat, sampleRate, playbackRate);
+        mTimestretchBufferProvider.reset(new TimestretchBufferProvider(timestretchChannelCount,
+                mMixerInFormat, sampleRate, playbackRate));
         reconfigureBufferProviders();
     } else {
-        static_cast<TimestretchBufferProvider*>(mTimestretchBufferProvider)
+        static_cast<TimestretchBufferProvider*>(mTimestretchBufferProvider.get())
                 ->setPlaybackRate(playbackRate);
     }
     return true;
@@ -840,7 +754,7 @@
  *
  * There is a bit of duplicated code here, but it keeps backward compatibility.
  */
-inline void AudioMixer::track_t::adjustVolumeRamp(bool aux, bool useFloat)
+inline void AudioMixer::Track::adjustVolumeRamp(bool aux, bool useFloat)
 {
     if (useFloat) {
         for (uint32_t i = 0; i < MAX_NUM_VOLUMES; i++) {
@@ -895,8 +809,9 @@
 size_t AudioMixer::getUnreleasedFrames(int name) const
 {
     name -= TRACK0;
-    if (uint32_t(name) < MAX_NUM_TRACKS) {
-        return mState.tracks[name].getUnreleasedFrames();
+    const auto it = mTracks.find(name);
+    if (it != mTracks.end()) {
+        return it->second->getUnreleasedFrames();
     }
     return 0;
 }
@@ -904,87 +819,63 @@
 void AudioMixer::setBufferProvider(int name, AudioBufferProvider* bufferProvider)
 {
     name -= TRACK0;
-    ALOG_ASSERT(uint32_t(name) < MAX_NUM_TRACKS, "bad track name %d", name);
+    const std::shared_ptr<Track> &track = mTracks[name];
 
-    if (mState.tracks[name].mInputBufferProvider == bufferProvider) {
+    if (track->mInputBufferProvider == bufferProvider) {
         return; // don't reset any buffer providers if identical.
     }
-    if (mState.tracks[name].mReformatBufferProvider != NULL) {
-        mState.tracks[name].mReformatBufferProvider->reset();
-    } else if (mState.tracks[name].downmixerBufferProvider != NULL) {
-        mState.tracks[name].downmixerBufferProvider->reset();
-    } else if (mState.tracks[name].mPostDownmixReformatBufferProvider != NULL) {
-        mState.tracks[name].mPostDownmixReformatBufferProvider->reset();
-    } else if (mState.tracks[name].mTimestretchBufferProvider != NULL) {
-        mState.tracks[name].mTimestretchBufferProvider->reset();
+    if (track->mReformatBufferProvider.get() != nullptr) {
+        track->mReformatBufferProvider->reset();
+    } else if (track->mDownmixerBufferProvider != nullptr) {
+        track->mDownmixerBufferProvider->reset();
+    } else if (track->mPostDownmixReformatBufferProvider.get() != nullptr) {
+        track->mPostDownmixReformatBufferProvider->reset();
+    } else if (track->mTimestretchBufferProvider.get() != nullptr) {
+        track->mTimestretchBufferProvider->reset();
     }
 
-    mState.tracks[name].mInputBufferProvider = bufferProvider;
-    mState.tracks[name].reconfigureBufferProviders();
+    track->mInputBufferProvider = bufferProvider;
+    track->reconfigureBufferProviders();
 }
 
-
-void AudioMixer::process()
+void AudioMixer::process__validate()
 {
-    mState.hook(&mState);
-}
-
-
-void AudioMixer::process__validate(state_t* state)
-{
-    ALOGW_IF(!state->needsChanged,
-        "in process__validate() but nothing's invalid");
-
-    uint32_t changed = state->needsChanged;
-    state->needsChanged = 0; // clear the validation flag
-
-    // recompute which tracks are enabled / disabled
-    uint32_t enabled = 0;
-    uint32_t disabled = 0;
-    while (changed) {
-        const int i = 31 - __builtin_clz(changed);
-        const uint32_t mask = 1<<i;
-        changed &= ~mask;
-        track_t& t = state->tracks[i];
-        (t.enabled ? enabled : disabled) |= mask;
-    }
-    state->enabledTracks &= ~disabled;
-    state->enabledTracks |=  enabled;
-
-    // compute everything we need...
-    int countActiveTracks = 0;
     // TODO: fix all16BitsStereNoResample logic to
     // either properly handle muted tracks (it should ignore them)
     // or remove altogether as an obsolete optimization.
     bool all16BitsStereoNoResample = true;
     bool resampling = false;
     bool volumeRamp = false;
-    uint32_t en = state->enabledTracks;
-    while (en) {
-        const int i = 31 - __builtin_clz(en);
-        en &= ~(1<<i);
 
-        countActiveTracks++;
-        track_t& t = state->tracks[i];
+    mEnabled.clear();
+    mGroups.clear();
+    for (const auto &pair : mTracks) {
+        const int name = pair.first;
+        const std::shared_ptr<Track> &t = pair.second;
+        if (!t->enabled) continue;
+
+        mEnabled.emplace_back(name);  // we add to mEnabled in order of name.
+        mGroups[t->mainBuffer].emplace_back(name); // mGroups also in order of name.
+
         uint32_t n = 0;
         // FIXME can overflow (mask is only 3 bits)
-        n |= NEEDS_CHANNEL_1 + t.channelCount - 1;
-        if (t.doesResample()) {
+        n |= NEEDS_CHANNEL_1 + t->channelCount - 1;
+        if (t->doesResample()) {
             n |= NEEDS_RESAMPLE;
         }
-        if (t.auxLevel != 0 && t.auxBuffer != NULL) {
+        if (t->auxLevel != 0 && t->auxBuffer != NULL) {
             n |= NEEDS_AUX;
         }
 
-        if (t.volumeInc[0]|t.volumeInc[1]) {
+        if (t->volumeInc[0]|t->volumeInc[1]) {
             volumeRamp = true;
-        } else if (!t.doesResample() && t.volumeRL == 0) {
+        } else if (!t->doesResample() && t->volumeRL == 0) {
             n |= NEEDS_MUTE;
         }
-        t.needs = n;
+        t->needs = n;
 
         if (n & NEEDS_MUTE) {
-            t.hook = track__nop;
+            t->hook = &Track::track__nop;
         } else {
             if (n & NEEDS_AUX) {
                 all16BitsStereoNoResample = false;
@@ -992,23 +883,23 @@
             if (n & NEEDS_RESAMPLE) {
                 all16BitsStereoNoResample = false;
                 resampling = true;
-                t.hook = getTrackHook(TRACKTYPE_RESAMPLE, t.mMixerChannelCount,
-                        t.mMixerInFormat, t.mMixerFormat);
+                t->hook = Track::getTrackHook(TRACKTYPE_RESAMPLE, t->mMixerChannelCount,
+                        t->mMixerInFormat, t->mMixerFormat);
                 ALOGV_IF((n & NEEDS_CHANNEL_COUNT__MASK) > NEEDS_CHANNEL_2,
                         "Track %d needs downmix + resample", i);
             } else {
                 if ((n & NEEDS_CHANNEL_COUNT__MASK) == NEEDS_CHANNEL_1){
-                    t.hook = getTrackHook(
-                            (t.mMixerChannelMask == AUDIO_CHANNEL_OUT_STEREO  // TODO: MONO_HACK
-                                    && t.channelMask == AUDIO_CHANNEL_OUT_MONO)
+                    t->hook = Track::getTrackHook(
+                            (t->mMixerChannelMask == AUDIO_CHANNEL_OUT_STEREO  // TODO: MONO_HACK
+                                    && t->channelMask == AUDIO_CHANNEL_OUT_MONO)
                                 ? TRACKTYPE_NORESAMPLEMONO : TRACKTYPE_NORESAMPLE,
-                            t.mMixerChannelCount,
-                            t.mMixerInFormat, t.mMixerFormat);
+                            t->mMixerChannelCount,
+                            t->mMixerInFormat, t->mMixerFormat);
                     all16BitsStereoNoResample = false;
                 }
                 if ((n & NEEDS_CHANNEL_COUNT__MASK) >= NEEDS_CHANNEL_2){
-                    t.hook = getTrackHook(TRACKTYPE_NORESAMPLE, t.mMixerChannelCount,
-                            t.mMixerInFormat, t.mMixerFormat);
+                    t->hook = Track::getTrackHook(TRACKTYPE_NORESAMPLE, t->mMixerChannelCount,
+                            t->mMixerInFormat, t->mMixerFormat);
                     ALOGV_IF((n & NEEDS_CHANNEL_COUNT__MASK) > NEEDS_CHANNEL_2,
                             "Track %d needs downmix", i);
                 }
@@ -1017,137 +908,125 @@
     }
 
     // select the processing hooks
-    state->hook = process__nop;
-    if (countActiveTracks > 0) {
+    mHook = &AudioMixer::process__nop;
+    if (mEnabled.size() > 0) {
         if (resampling) {
-            if (!state->outputTemp) {
-                state->outputTemp = new int32_t[MAX_NUM_CHANNELS * state->frameCount];
+            if (mOutputTemp.get() == nullptr) {
+                mOutputTemp.reset(new int32_t[MAX_NUM_CHANNELS * mFrameCount]);
             }
-            if (!state->resampleTemp) {
-                state->resampleTemp = new int32_t[MAX_NUM_CHANNELS * state->frameCount];
+            if (mResampleTemp.get() == nullptr) {
+                mResampleTemp.reset(new int32_t[MAX_NUM_CHANNELS * mFrameCount]);
             }
-            state->hook = process__genericResampling;
+            mHook = &AudioMixer::process__genericResampling;
         } else {
-            if (state->outputTemp) {
-                delete [] state->outputTemp;
-                state->outputTemp = NULL;
-            }
-            if (state->resampleTemp) {
-                delete [] state->resampleTemp;
-                state->resampleTemp = NULL;
-            }
-            state->hook = process__genericNoResampling;
+            // we keep temp arrays around.
+            mHook = &AudioMixer::process__genericNoResampling;
             if (all16BitsStereoNoResample && !volumeRamp) {
-                if (countActiveTracks == 1) {
-                    const int i = 31 - __builtin_clz(state->enabledTracks);
-                    track_t& t = state->tracks[i];
-                    if ((t.needs & NEEDS_MUTE) == 0) {
+                if (mEnabled.size() == 1) {
+                    const std::shared_ptr<Track> &t = mTracks[mEnabled[0]];
+                    if ((t->needs & NEEDS_MUTE) == 0) {
                         // The check prevents a muted track from acquiring a process hook.
                         //
                         // This is dangerous if the track is MONO as that requires
                         // special case handling due to implicit channel duplication.
                         // Stereo or Multichannel should actually be fine here.
-                        state->hook = getProcessHook(PROCESSTYPE_NORESAMPLEONETRACK,
-                                t.mMixerChannelCount, t.mMixerInFormat, t.mMixerFormat);
+                        mHook = getProcessHook(PROCESSTYPE_NORESAMPLEONETRACK,
+                                t->mMixerChannelCount, t->mMixerInFormat, t->mMixerFormat);
                     }
                 }
             }
         }
     }
 
-    ALOGV("mixer configuration change: %d activeTracks (%08x) "
+    ALOGV("mixer configuration change: %zu "
         "all16BitsStereoNoResample=%d, resampling=%d, volumeRamp=%d",
-        countActiveTracks, state->enabledTracks,
-        all16BitsStereoNoResample, resampling, volumeRamp);
+        mEnabled.size(), all16BitsStereoNoResample, resampling, volumeRamp);
 
-   state->hook(state);
+   process();
 
     // Now that the volume ramp has been done, set optimal state and
     // track hooks for subsequent mixer process
-    if (countActiveTracks > 0) {
+    if (mEnabled.size() > 0) {
         bool allMuted = true;
-        uint32_t en = state->enabledTracks;
-        while (en) {
-            const int i = 31 - __builtin_clz(en);
-            en &= ~(1<<i);
-            track_t& t = state->tracks[i];
-            if (!t.doesResample() && t.volumeRL == 0) {
-                t.needs |= NEEDS_MUTE;
-                t.hook = track__nop;
+
+        for (const int name : mEnabled) {
+            const std::shared_ptr<Track> &t = mTracks[name];
+            if (!t->doesResample() && t->volumeRL == 0) {
+                t->needs |= NEEDS_MUTE;
+                t->hook = &Track::track__nop;
             } else {
                 allMuted = false;
             }
         }
         if (allMuted) {
-            state->hook = process__nop;
+            mHook = &AudioMixer::process__nop;
         } else if (all16BitsStereoNoResample) {
-            if (countActiveTracks == 1) {
-                const int i = 31 - __builtin_clz(state->enabledTracks);
-                track_t& t = state->tracks[i];
+            if (mEnabled.size() == 1) {
+                //const int i = 31 - __builtin_clz(enabledTracks);
+                const std::shared_ptr<Track> &t = mTracks[mEnabled[0]];
                 // Muted single tracks handled by allMuted above.
-                state->hook = getProcessHook(PROCESSTYPE_NORESAMPLEONETRACK,
-                        t.mMixerChannelCount, t.mMixerInFormat, t.mMixerFormat);
+                mHook = getProcessHook(PROCESSTYPE_NORESAMPLEONETRACK,
+                        t->mMixerChannelCount, t->mMixerInFormat, t->mMixerFormat);
             }
         }
     }
 }
 
-
-void AudioMixer::track__genericResample(track_t* t, int32_t* out, size_t outFrameCount,
-        int32_t* temp, int32_t* aux)
+void AudioMixer::Track::track__genericResample(
+        int32_t* out, size_t outFrameCount, int32_t* temp, int32_t* aux)
 {
     ALOGVV("track__genericResample\n");
-    t->resampler->setSampleRate(t->sampleRate);
+    mResampler->setSampleRate(sampleRate);
 
     // ramp gain - resample to temp buffer and scale/mix in 2nd step
     if (aux != NULL) {
         // always resample with unity gain when sending to auxiliary buffer to be able
         // to apply send level after resampling
-        t->resampler->setVolume(UNITY_GAIN_FLOAT, UNITY_GAIN_FLOAT);
-        memset(temp, 0, outFrameCount * t->mMixerChannelCount * sizeof(int32_t));
-        t->resampler->resample(temp, outFrameCount, t->bufferProvider);
-        if (CC_UNLIKELY(t->volumeInc[0]|t->volumeInc[1]|t->auxInc)) {
-            volumeRampStereo(t, out, outFrameCount, temp, aux);
+        mResampler->setVolume(UNITY_GAIN_FLOAT, UNITY_GAIN_FLOAT);
+        memset(temp, 0, outFrameCount * mMixerChannelCount * sizeof(int32_t));
+        mResampler->resample(temp, outFrameCount, bufferProvider);
+        if (CC_UNLIKELY(volumeInc[0]|volumeInc[1]|auxInc)) {
+            volumeRampStereo(out, outFrameCount, temp, aux);
         } else {
-            volumeStereo(t, out, outFrameCount, temp, aux);
+            volumeStereo(out, outFrameCount, temp, aux);
         }
     } else {
-        if (CC_UNLIKELY(t->volumeInc[0]|t->volumeInc[1])) {
-            t->resampler->setVolume(UNITY_GAIN_FLOAT, UNITY_GAIN_FLOAT);
+        if (CC_UNLIKELY(volumeInc[0]|volumeInc[1])) {
+            mResampler->setVolume(UNITY_GAIN_FLOAT, UNITY_GAIN_FLOAT);
             memset(temp, 0, outFrameCount * MAX_NUM_CHANNELS * sizeof(int32_t));
-            t->resampler->resample(temp, outFrameCount, t->bufferProvider);
-            volumeRampStereo(t, out, outFrameCount, temp, aux);
+            mResampler->resample(temp, outFrameCount, bufferProvider);
+            volumeRampStereo(out, outFrameCount, temp, aux);
         }
 
         // constant gain
         else {
-            t->resampler->setVolume(t->mVolume[0], t->mVolume[1]);
-            t->resampler->resample(out, outFrameCount, t->bufferProvider);
+            mResampler->setVolume(mVolume[0], mVolume[1]);
+            mResampler->resample(out, outFrameCount, bufferProvider);
         }
     }
 }
 
-void AudioMixer::track__nop(track_t* t __unused, int32_t* out __unused,
+void AudioMixer::Track::track__nop(int32_t* out __unused,
         size_t outFrameCount __unused, int32_t* temp __unused, int32_t* aux __unused)
 {
 }
 
-void AudioMixer::volumeRampStereo(track_t* t, int32_t* out, size_t frameCount, int32_t* temp,
-        int32_t* aux)
+void AudioMixer::Track::volumeRampStereo(
+        int32_t* out, size_t frameCount, int32_t* temp, int32_t* aux)
 {
-    int32_t vl = t->prevVolume[0];
-    int32_t vr = t->prevVolume[1];
-    const int32_t vlInc = t->volumeInc[0];
-    const int32_t vrInc = t->volumeInc[1];
+    int32_t vl = prevVolume[0];
+    int32_t vr = prevVolume[1];
+    const int32_t vlInc = volumeInc[0];
+    const int32_t vrInc = volumeInc[1];
 
     //ALOGD("[0] %p: inc=%f, v0=%f, v1=%d, final=%f, count=%d",
-    //        t, vlInc/65536.0f, vl/65536.0f, t->volume[0],
+    //        t, vlInc/65536.0f, vl/65536.0f, volume[0],
     //       (vl + vlInc*frameCount)/65536.0f, frameCount);
 
     // ramp volume
     if (CC_UNLIKELY(aux != NULL)) {
-        int32_t va = t->prevAuxLevel;
-        const int32_t vaInc = t->auxInc;
+        int32_t va = prevAuxLevel;
+        const int32_t vaInc = auxInc;
         int32_t l;
         int32_t r;
 
@@ -1161,7 +1040,7 @@
             vr += vrInc;
             va += vaInc;
         } while (--frameCount);
-        t->prevAuxLevel = va;
+        prevAuxLevel = va;
     } else {
         do {
             *out++ += (vl >> 16) * (*temp++ >> 12);
@@ -1170,19 +1049,19 @@
             vr += vrInc;
         } while (--frameCount);
     }
-    t->prevVolume[0] = vl;
-    t->prevVolume[1] = vr;
-    t->adjustVolumeRamp(aux != NULL);
+    prevVolume[0] = vl;
+    prevVolume[1] = vr;
+    adjustVolumeRamp(aux != NULL);
 }
 
-void AudioMixer::volumeStereo(track_t* t, int32_t* out, size_t frameCount, int32_t* temp,
-        int32_t* aux)
+void AudioMixer::Track::volumeStereo(
+        int32_t* out, size_t frameCount, int32_t* temp, int32_t* aux)
 {
-    const int16_t vl = t->volume[0];
-    const int16_t vr = t->volume[1];
+    const int16_t vl = volume[0];
+    const int16_t vr = volume[1];
 
     if (CC_UNLIKELY(aux != NULL)) {
-        const int16_t va = t->auxLevel;
+        const int16_t va = auxLevel;
         do {
             int16_t l = (int16_t)(*temp++ >> 12);
             int16_t r = (int16_t)(*temp++ >> 12);
@@ -1204,25 +1083,25 @@
     }
 }
 
-void AudioMixer::track__16BitsStereo(track_t* t, int32_t* out, size_t frameCount,
-        int32_t* temp __unused, int32_t* aux)
+void AudioMixer::Track::track__16BitsStereo(
+        int32_t* out, size_t frameCount, int32_t* temp __unused, int32_t* aux)
 {
     ALOGVV("track__16BitsStereo\n");
-    const int16_t *in = static_cast<const int16_t *>(t->in);
+    const int16_t *in = static_cast<const int16_t *>(mIn);
 
     if (CC_UNLIKELY(aux != NULL)) {
         int32_t l;
         int32_t r;
         // ramp gain
-        if (CC_UNLIKELY(t->volumeInc[0]|t->volumeInc[1]|t->auxInc)) {
-            int32_t vl = t->prevVolume[0];
-            int32_t vr = t->prevVolume[1];
-            int32_t va = t->prevAuxLevel;
-            const int32_t vlInc = t->volumeInc[0];
-            const int32_t vrInc = t->volumeInc[1];
-            const int32_t vaInc = t->auxInc;
+        if (CC_UNLIKELY(volumeInc[0]|volumeInc[1]|auxInc)) {
+            int32_t vl = prevVolume[0];
+            int32_t vr = prevVolume[1];
+            int32_t va = prevAuxLevel;
+            const int32_t vlInc = volumeInc[0];
+            const int32_t vrInc = volumeInc[1];
+            const int32_t vaInc = auxInc;
             // ALOGD("[1] %p: inc=%f, v0=%f, v1=%d, final=%f, count=%d",
-            //        t, vlInc/65536.0f, vl/65536.0f, t->volume[0],
+            //        t, vlInc/65536.0f, vl/65536.0f, volume[0],
             //        (vl + vlInc*frameCount)/65536.0f, frameCount);
 
             do {
@@ -1236,16 +1115,16 @@
                 va += vaInc;
             } while (--frameCount);
 
-            t->prevVolume[0] = vl;
-            t->prevVolume[1] = vr;
-            t->prevAuxLevel = va;
-            t->adjustVolumeRamp(true);
+            prevVolume[0] = vl;
+            prevVolume[1] = vr;
+            prevAuxLevel = va;
+            adjustVolumeRamp(true);
         }
 
         // constant gain
         else {
-            const uint32_t vrl = t->volumeRL;
-            const int16_t va = (int16_t)t->auxLevel;
+            const uint32_t vrl = volumeRL;
+            const int16_t va = (int16_t)auxLevel;
             do {
                 uint32_t rl = *reinterpret_cast<const uint32_t *>(in);
                 int16_t a = (int16_t)(((int32_t)in[0] + in[1]) >> 1);
@@ -1259,14 +1138,14 @@
         }
     } else {
         // ramp gain
-        if (CC_UNLIKELY(t->volumeInc[0]|t->volumeInc[1])) {
-            int32_t vl = t->prevVolume[0];
-            int32_t vr = t->prevVolume[1];
-            const int32_t vlInc = t->volumeInc[0];
-            const int32_t vrInc = t->volumeInc[1];
+        if (CC_UNLIKELY(volumeInc[0]|volumeInc[1])) {
+            int32_t vl = prevVolume[0];
+            int32_t vr = prevVolume[1];
+            const int32_t vlInc = volumeInc[0];
+            const int32_t vrInc = volumeInc[1];
 
             // ALOGD("[1] %p: inc=%f, v0=%f, v1=%d, final=%f, count=%d",
-            //        t, vlInc/65536.0f, vl/65536.0f, t->volume[0],
+            //        t, vlInc/65536.0f, vl/65536.0f, volume[0],
             //        (vl + vlInc*frameCount)/65536.0f, frameCount);
 
             do {
@@ -1276,14 +1155,14 @@
                 vr += vrInc;
             } while (--frameCount);
 
-            t->prevVolume[0] = vl;
-            t->prevVolume[1] = vr;
-            t->adjustVolumeRamp(false);
+            prevVolume[0] = vl;
+            prevVolume[1] = vr;
+            adjustVolumeRamp(false);
         }
 
         // constant gain
         else {
-            const uint32_t vrl = t->volumeRL;
+            const uint32_t vrl = volumeRL;
             do {
                 uint32_t rl = *reinterpret_cast<const uint32_t *>(in);
                 in += 2;
@@ -1293,27 +1172,27 @@
             } while (--frameCount);
         }
     }
-    t->in = in;
+    mIn = in;
 }
 
-void AudioMixer::track__16BitsMono(track_t* t, int32_t* out, size_t frameCount,
-        int32_t* temp __unused, int32_t* aux)
+void AudioMixer::Track::track__16BitsMono(
+        int32_t* out, size_t frameCount, int32_t* temp __unused, int32_t* aux)
 {
     ALOGVV("track__16BitsMono\n");
-    const int16_t *in = static_cast<int16_t const *>(t->in);
+    const int16_t *in = static_cast<int16_t const *>(mIn);
 
     if (CC_UNLIKELY(aux != NULL)) {
         // ramp gain
-        if (CC_UNLIKELY(t->volumeInc[0]|t->volumeInc[1]|t->auxInc)) {
-            int32_t vl = t->prevVolume[0];
-            int32_t vr = t->prevVolume[1];
-            int32_t va = t->prevAuxLevel;
-            const int32_t vlInc = t->volumeInc[0];
-            const int32_t vrInc = t->volumeInc[1];
-            const int32_t vaInc = t->auxInc;
+        if (CC_UNLIKELY(volumeInc[0]|volumeInc[1]|auxInc)) {
+            int32_t vl = prevVolume[0];
+            int32_t vr = prevVolume[1];
+            int32_t va = prevAuxLevel;
+            const int32_t vlInc = volumeInc[0];
+            const int32_t vrInc = volumeInc[1];
+            const int32_t vaInc = auxInc;
 
             // ALOGD("[2] %p: inc=%f, v0=%f, v1=%d, final=%f, count=%d",
-            //         t, vlInc/65536.0f, vl/65536.0f, t->volume[0],
+            //         t, vlInc/65536.0f, vl/65536.0f, volume[0],
             //         (vl + vlInc*frameCount)/65536.0f, frameCount);
 
             do {
@@ -1326,16 +1205,16 @@
                 va += vaInc;
             } while (--frameCount);
 
-            t->prevVolume[0] = vl;
-            t->prevVolume[1] = vr;
-            t->prevAuxLevel = va;
-            t->adjustVolumeRamp(true);
+            prevVolume[0] = vl;
+            prevVolume[1] = vr;
+            prevAuxLevel = va;
+            adjustVolumeRamp(true);
         }
         // constant gain
         else {
-            const int16_t vl = t->volume[0];
-            const int16_t vr = t->volume[1];
-            const int16_t va = (int16_t)t->auxLevel;
+            const int16_t vl = volume[0];
+            const int16_t vr = volume[1];
+            const int16_t va = (int16_t)auxLevel;
             do {
                 int16_t l = *in++;
                 out[0] = mulAdd(l, vl, out[0]);
@@ -1347,14 +1226,14 @@
         }
     } else {
         // ramp gain
-        if (CC_UNLIKELY(t->volumeInc[0]|t->volumeInc[1])) {
-            int32_t vl = t->prevVolume[0];
-            int32_t vr = t->prevVolume[1];
-            const int32_t vlInc = t->volumeInc[0];
-            const int32_t vrInc = t->volumeInc[1];
+        if (CC_UNLIKELY(volumeInc[0]|volumeInc[1])) {
+            int32_t vl = prevVolume[0];
+            int32_t vr = prevVolume[1];
+            const int32_t vlInc = volumeInc[0];
+            const int32_t vrInc = volumeInc[1];
 
             // ALOGD("[2] %p: inc=%f, v0=%f, v1=%d, final=%f, count=%d",
-            //         t, vlInc/65536.0f, vl/65536.0f, t->volume[0],
+            //         t, vlInc/65536.0f, vl/65536.0f, volume[0],
             //         (vl + vlInc*frameCount)/65536.0f, frameCount);
 
             do {
@@ -1365,14 +1244,14 @@
                 vr += vrInc;
             } while (--frameCount);
 
-            t->prevVolume[0] = vl;
-            t->prevVolume[1] = vr;
-            t->adjustVolumeRamp(false);
+            prevVolume[0] = vl;
+            prevVolume[1] = vr;
+            adjustVolumeRamp(false);
         }
         // constant gain
         else {
-            const int16_t vl = t->volume[0];
-            const int16_t vr = t->volume[1];
+            const int16_t vl = volume[0];
+            const int16_t vr = volume[1];
             do {
                 int16_t l = *in++;
                 out[0] = mulAdd(l, vl, out[0]);
@@ -1381,274 +1260,214 @@
             } while (--frameCount);
         }
     }
-    t->in = in;
+    mIn = in;
 }
 
 // no-op case
-void AudioMixer::process__nop(state_t* state)
+void AudioMixer::process__nop()
 {
     ALOGVV("process__nop\n");
-    uint32_t e0 = state->enabledTracks;
-    while (e0) {
+
+    for (const auto &pair : mGroups) {
         // process by group of tracks with same output buffer to
         // avoid multiple memset() on same buffer
-        uint32_t e1 = e0, e2 = e0;
-        int i = 31 - __builtin_clz(e1);
-        {
-            track_t& t1 = state->tracks[i];
-            e2 &= ~(1<<i);
-            while (e2) {
-                i = 31 - __builtin_clz(e2);
-                e2 &= ~(1<<i);
-                track_t& t2 = state->tracks[i];
-                if (CC_UNLIKELY(t2.mainBuffer != t1.mainBuffer)) {
-                    e1 &= ~(1<<i);
-                }
-            }
-            e0 &= ~(e1);
+        const auto &group = pair.second;
 
-            memset(t1.mainBuffer, 0, state->frameCount * t1.mMixerChannelCount
-                    * audio_bytes_per_sample(t1.mMixerFormat));
-        }
+        const std::shared_ptr<Track> &t = mTracks[group[0]];
+        memset(t->mainBuffer, 0,
+                mFrameCount * t->mMixerChannelCount
+                * audio_bytes_per_sample(t->mMixerFormat));
 
-        while (e1) {
-            i = 31 - __builtin_clz(e1);
-            e1 &= ~(1<<i);
-            {
-                track_t& t3 = state->tracks[i];
-                size_t outFrames = state->frameCount;
-                while (outFrames) {
-                    t3.buffer.frameCount = outFrames;
-                    t3.bufferProvider->getNextBuffer(&t3.buffer);
-                    if (t3.buffer.raw == NULL) break;
-                    outFrames -= t3.buffer.frameCount;
-                    t3.bufferProvider->releaseBuffer(&t3.buffer);
-                }
+        // now consume data
+        for (const int name : group) {
+            const std::shared_ptr<Track> &t = mTracks[name];
+            size_t outFrames = mFrameCount;
+            while (outFrames) {
+                t->buffer.frameCount = outFrames;
+                t->bufferProvider->getNextBuffer(&t->buffer);
+                if (t->buffer.raw == NULL) break;
+                outFrames -= t->buffer.frameCount;
+                t->bufferProvider->releaseBuffer(&t->buffer);
             }
         }
     }
 }
 
 // generic code without resampling
-void AudioMixer::process__genericNoResampling(state_t* state)
+void AudioMixer::process__genericNoResampling()
 {
     ALOGVV("process__genericNoResampling\n");
     int32_t outTemp[BLOCKSIZE * MAX_NUM_CHANNELS] __attribute__((aligned(32)));
 
-    // acquire each track's buffer
-    uint32_t enabledTracks = state->enabledTracks;
-    uint32_t e0 = enabledTracks;
-    while (e0) {
-        const int i = 31 - __builtin_clz(e0);
-        e0 &= ~(1<<i);
-        track_t& t = state->tracks[i];
-        t.buffer.frameCount = state->frameCount;
-        t.bufferProvider->getNextBuffer(&t.buffer);
-        t.frameCount = t.buffer.frameCount;
-        t.in = t.buffer.raw;
-    }
+    for (const auto &pair : mGroups) {
+        // process by group of tracks with same output main buffer to
+        // avoid multiple memset() on same buffer
+        const auto &group = pair.second;
 
-    e0 = enabledTracks;
-    while (e0) {
-        // process by group of tracks with same output buffer to
-        // optimize cache use
-        uint32_t e1 = e0, e2 = e0;
-        int j = 31 - __builtin_clz(e1);
-        track_t& t1 = state->tracks[j];
-        e2 &= ~(1<<j);
-        while (e2) {
-            j = 31 - __builtin_clz(e2);
-            e2 &= ~(1<<j);
-            track_t& t2 = state->tracks[j];
-            if (CC_UNLIKELY(t2.mainBuffer != t1.mainBuffer)) {
-                e1 &= ~(1<<j);
-            }
+        // acquire buffer
+        for (const int name : group) {
+            const std::shared_ptr<Track> &t = mTracks[name];
+            t->buffer.frameCount = mFrameCount;
+            t->bufferProvider->getNextBuffer(&t->buffer);
+            t->frameCount = t->buffer.frameCount;
+            t->mIn = t->buffer.raw;
         }
-        e0 &= ~(e1);
-        // this assumes output 16 bits stereo, no resampling
-        int32_t *out = t1.mainBuffer;
+
+        int32_t *out = (int *)pair.first;
         size_t numFrames = 0;
         do {
-            const size_t frameCount = min((size_t)BLOCKSIZE, state->frameCount - numFrames);
+            const size_t frameCount = std::min((size_t)BLOCKSIZE, mFrameCount - numFrames);
             memset(outTemp, 0, sizeof(outTemp));
-            e2 = e1;
-            while (e2) {
-                const int i = 31 - __builtin_clz(e2);
-                e2 &= ~(1<<i);
-                track_t& t = state->tracks[i];
-                size_t outFrames = frameCount;
+            for (const int name : group) {
+                const std::shared_ptr<Track> &t = mTracks[name];
                 int32_t *aux = NULL;
-                if (CC_UNLIKELY(t.needs & NEEDS_AUX)) {
-                    aux = t.auxBuffer + numFrames;
+                if (CC_UNLIKELY(t->needs & NEEDS_AUX)) {
+                    aux = t->auxBuffer + numFrames;
                 }
-                while (outFrames) {
-                    // t.in == NULL can happen if the track was flushed just after having
+                for (int outFrames = frameCount; outFrames > 0; ) {
+                    // t->in == nullptr can happen if the track was flushed just after having
                     // been enabled for mixing.
-                   if (t.in == NULL) {
-                        enabledTracks &= ~(1<<i);
-                        e1 &= ~(1<<i);
+                    if (t->mIn == nullptr) {
                         break;
                     }
-                    size_t inFrames = (t.frameCount > outFrames)?outFrames:t.frameCount;
+                    size_t inFrames = (t->frameCount > outFrames)?outFrames:t->frameCount;
                     if (inFrames > 0) {
-                        t.hook(&t, outTemp + (frameCount - outFrames) * t.mMixerChannelCount,
-                                inFrames, state->resampleTemp, aux);
-                        t.frameCount -= inFrames;
+                        (t.get()->*t->hook)(
+                                outTemp + (frameCount - outFrames) * t->mMixerChannelCount,
+                                inFrames, mResampleTemp.get() /* naked ptr */, aux);
+                        t->frameCount -= inFrames;
                         outFrames -= inFrames;
                         if (CC_UNLIKELY(aux != NULL)) {
                             aux += inFrames;
                         }
                     }
-                    if (t.frameCount == 0 && outFrames) {
-                        t.bufferProvider->releaseBuffer(&t.buffer);
-                        t.buffer.frameCount = (state->frameCount - numFrames) -
+                    if (t->frameCount == 0 && outFrames) {
+                        t->bufferProvider->releaseBuffer(&t->buffer);
+                        t->buffer.frameCount = (mFrameCount - numFrames) -
                                 (frameCount - outFrames);
-                        t.bufferProvider->getNextBuffer(&t.buffer);
-                        t.in = t.buffer.raw;
-                        if (t.in == NULL) {
-                            enabledTracks &= ~(1<<i);
-                            e1 &= ~(1<<i);
+                        t->bufferProvider->getNextBuffer(&t->buffer);
+                        t->mIn = t->buffer.raw;
+                        if (t->mIn == nullptr) {
                             break;
                         }
-                        t.frameCount = t.buffer.frameCount;
+                        t->frameCount = t->buffer.frameCount;
                     }
                 }
             }
 
-            convertMixerFormat(out, t1.mMixerFormat, outTemp, t1.mMixerInFormat,
-                    frameCount * t1.mMixerChannelCount);
+            const std::shared_ptr<Track> &t1 = mTracks[group[0]];
+            convertMixerFormat(out, t1->mMixerFormat, outTemp, t1->mMixerInFormat,
+                    frameCount * t1->mMixerChannelCount);
             // TODO: fix ugly casting due to choice of out pointer type
             out = reinterpret_cast<int32_t*>((uint8_t*)out
-                    + frameCount * t1.mMixerChannelCount
-                        * audio_bytes_per_sample(t1.mMixerFormat));
+                    + frameCount * t1->mMixerChannelCount
+                    * audio_bytes_per_sample(t1->mMixerFormat));
             numFrames += frameCount;
-        } while (numFrames < state->frameCount);
-    }
+        } while (numFrames < mFrameCount);
 
-    // release each track's buffer
-    e0 = enabledTracks;
-    while (e0) {
-        const int i = 31 - __builtin_clz(e0);
-        e0 &= ~(1<<i);
-        track_t& t = state->tracks[i];
-        t.bufferProvider->releaseBuffer(&t.buffer);
+        // release each track's buffer
+        for (const int name : group) {
+            const std::shared_ptr<Track> &t = mTracks[name];
+            t->bufferProvider->releaseBuffer(&t->buffer);
+        }
     }
 }
 
-
 // generic code with resampling
-void AudioMixer::process__genericResampling(state_t* state)
+void AudioMixer::process__genericResampling()
 {
     ALOGVV("process__genericResampling\n");
-    // this const just means that local variable outTemp doesn't change
-    int32_t* const outTemp = state->outputTemp;
-    size_t numFrames = state->frameCount;
+    int32_t * const outTemp = mOutputTemp.get(); // naked ptr
+    size_t numFrames = mFrameCount;
 
-    uint32_t e0 = state->enabledTracks;
-    while (e0) {
-        // process by group of tracks with same output buffer
-        // to optimize cache use
-        uint32_t e1 = e0, e2 = e0;
-        int j = 31 - __builtin_clz(e1);
-        track_t& t1 = state->tracks[j];
-        e2 &= ~(1<<j);
-        while (e2) {
-            j = 31 - __builtin_clz(e2);
-            e2 &= ~(1<<j);
-            track_t& t2 = state->tracks[j];
-            if (CC_UNLIKELY(t2.mainBuffer != t1.mainBuffer)) {
-                e1 &= ~(1<<j);
-            }
-        }
-        e0 &= ~(e1);
-        int32_t *out = t1.mainBuffer;
-        memset(outTemp, 0, sizeof(*outTemp) * t1.mMixerChannelCount * state->frameCount);
-        while (e1) {
-            const int i = 31 - __builtin_clz(e1);
-            e1 &= ~(1<<i);
-            track_t& t = state->tracks[i];
+    for (const auto &pair : mGroups) {
+        const auto &group = pair.second;
+        const std::shared_ptr<Track> &t1 = mTracks[group[0]];
+
+        // clear temp buffer
+        memset(outTemp, 0, sizeof(*outTemp) * t1->mMixerChannelCount * mFrameCount);
+        for (const int name : group) {
+            const std::shared_ptr<Track> &t = mTracks[name];
             int32_t *aux = NULL;
-            if (CC_UNLIKELY(t.needs & NEEDS_AUX)) {
-                aux = t.auxBuffer;
+            if (CC_UNLIKELY(t->needs & NEEDS_AUX)) {
+                aux = t->auxBuffer;
             }
 
             // this is a little goofy, on the resampling case we don't
             // acquire/release the buffers because it's done by
             // the resampler.
-            if (t.needs & NEEDS_RESAMPLE) {
-                t.hook(&t, outTemp, numFrames, state->resampleTemp, aux);
+            if (t->needs & NEEDS_RESAMPLE) {
+                (t.get()->*t->hook)(outTemp, numFrames, mResampleTemp.get() /* naked ptr */, aux);
             } else {
 
                 size_t outFrames = 0;
 
                 while (outFrames < numFrames) {
-                    t.buffer.frameCount = numFrames - outFrames;
-                    t.bufferProvider->getNextBuffer(&t.buffer);
-                    t.in = t.buffer.raw;
-                    // t.in == NULL can happen if the track was flushed just after having
+                    t->buffer.frameCount = numFrames - outFrames;
+                    t->bufferProvider->getNextBuffer(&t->buffer);
+                    t->mIn = t->buffer.raw;
+                    // t->mIn == nullptr can happen if the track was flushed just after having
                     // been enabled for mixing.
-                    if (t.in == NULL) break;
+                    if (t->mIn == nullptr) break;
 
                     if (CC_UNLIKELY(aux != NULL)) {
                         aux += outFrames;
                     }
-                    t.hook(&t, outTemp + outFrames * t.mMixerChannelCount, t.buffer.frameCount,
-                            state->resampleTemp, aux);
-                    outFrames += t.buffer.frameCount;
-                    t.bufferProvider->releaseBuffer(&t.buffer);
+                    (t.get()->*t->hook)(
+                            outTemp + outFrames * t->mMixerChannelCount, t->buffer.frameCount,
+                            mResampleTemp.get() /* naked ptr */, aux);
+                    outFrames += t->buffer.frameCount;
+                    t->bufferProvider->releaseBuffer(&t->buffer);
                 }
             }
         }
-        convertMixerFormat(out, t1.mMixerFormat,
-                outTemp, t1.mMixerInFormat, numFrames * t1.mMixerChannelCount);
+        convertMixerFormat(t1->mainBuffer, t1->mMixerFormat,
+                outTemp, t1->mMixerInFormat, numFrames * t1->mMixerChannelCount);
     }
 }
 
 // one track, 16 bits stereo without resampling is the most common case
-void AudioMixer::process__OneTrack16BitsStereoNoResampling(state_t* state)
+void AudioMixer::process__oneTrack16BitsStereoNoResampling()
 {
-    ALOGVV("process__OneTrack16BitsStereoNoResampling\n");
-    // This method is only called when state->enabledTracks has exactly
-    // one bit set.  The asserts below would verify this, but are commented out
-    // since the whole point of this method is to optimize performance.
-    //ALOG_ASSERT(0 != state->enabledTracks, "no tracks enabled");
-    const int i = 31 - __builtin_clz(state->enabledTracks);
-    //ALOG_ASSERT((1 << i) == state->enabledTracks, "more than 1 track enabled");
-    const track_t& t = state->tracks[i];
+    ALOGVV("process__oneTrack16BitsStereoNoResampling\n");
+    LOG_ALWAYS_FATAL_IF(mEnabled.size() != 0,
+            "%zu != 1 tracks enabled", mEnabled.size());
+    const int name = mEnabled[0];
+    const std::shared_ptr<Track> &t = mTracks[name];
 
-    AudioBufferProvider::Buffer& b(t.buffer);
+    AudioBufferProvider::Buffer& b(t->buffer);
 
-    int32_t* out = t.mainBuffer;
+    int32_t* out = t->mainBuffer;
     float *fout = reinterpret_cast<float*>(out);
-    size_t numFrames = state->frameCount;
+    size_t numFrames = mFrameCount;
 
-    const int16_t vl = t.volume[0];
-    const int16_t vr = t.volume[1];
-    const uint32_t vrl = t.volumeRL;
+    const int16_t vl = t->volume[0];
+    const int16_t vr = t->volume[1];
+    const uint32_t vrl = t->volumeRL;
     while (numFrames) {
         b.frameCount = numFrames;
-        t.bufferProvider->getNextBuffer(&b);
+        t->bufferProvider->getNextBuffer(&b);
         const int16_t *in = b.i16;
 
         // in == NULL can happen if the track was flushed just after having
         // been enabled for mixing.
         if (in == NULL || (((uintptr_t)in) & 3)) {
-            if ( AUDIO_FORMAT_PCM_FLOAT == t.mMixerFormat ) {
+            if ( AUDIO_FORMAT_PCM_FLOAT == t->mMixerFormat ) {
                  memset((char*)fout, 0, numFrames
-                         * t.mMixerChannelCount * audio_bytes_per_sample(t.mMixerFormat));
+                         * t->mMixerChannelCount * audio_bytes_per_sample(t->mMixerFormat));
             } else {
                  memset((char*)out, 0, numFrames
-                         * t.mMixerChannelCount * audio_bytes_per_sample(t.mMixerFormat));
+                         * t->mMixerChannelCount * audio_bytes_per_sample(t->mMixerFormat));
             }
             ALOGE_IF((((uintptr_t)in) & 3),
-                    "process__OneTrack16BitsStereoNoResampling: misaligned buffer"
+                    "process__oneTrack16BitsStereoNoResampling: misaligned buffer"
                     " %p track %d, channels %d, needs %08x, volume %08x vfl %f vfr %f",
-                    in, i, t.channelCount, t.needs, vrl, t.mVolume[0], t.mVolume[1]);
+                    in, name, t->channelCount, t->needs, vrl, t->mVolume[0], t->mVolume[1]);
             return;
         }
         size_t outFrames = b.frameCount;
 
-        switch (t.mMixerFormat) {
+        switch (t->mMixerFormat) {
         case AUDIO_FORMAT_PCM_FLOAT:
             do {
                 uint32_t rl = *reinterpret_cast<const uint32_t *>(in);
@@ -1686,10 +1505,10 @@
             }
             break;
         default:
-            LOG_ALWAYS_FATAL("bad mixer format: %d", t.mMixerFormat);
+            LOG_ALWAYS_FATAL("bad mixer format: %d", t->mMixerFormat);
         }
         numFrames -= b.frameCount;
-        t.bufferProvider->releaseBuffer(&b);
+        t->bufferProvider->releaseBuffer(&b);
     }
 }
 
@@ -1800,42 +1619,42 @@
  */
 template <int MIXTYPE, bool USEFLOATVOL, bool ADJUSTVOL,
     typename TO, typename TI, typename TA>
-void AudioMixer::volumeMix(TO *out, size_t outFrames,
-        const TI *in, TA *aux, bool ramp, AudioMixer::track_t *t)
+void AudioMixer::Track::volumeMix(TO *out, size_t outFrames,
+        const TI *in, TA *aux, bool ramp)
 {
     if (USEFLOATVOL) {
         if (ramp) {
-            volumeRampMulti<MIXTYPE>(t->mMixerChannelCount, out, outFrames, in, aux,
-                    t->mPrevVolume, t->mVolumeInc,
+            volumeRampMulti<MIXTYPE>(mMixerChannelCount, out, outFrames, in, aux,
+                    mPrevVolume, mVolumeInc,
 #ifdef FLOAT_AUX
-                    &t->mPrevAuxLevel, t->mAuxInc
+                    &mPrevAuxLevel, mAuxInc
 #else
-                    &t->prevAuxLevel, t->auxInc
+                    &prevAuxLevel, auxInc
 #endif
                 );
             if (ADJUSTVOL) {
-                t->adjustVolumeRamp(aux != NULL, true);
+                adjustVolumeRamp(aux != NULL, true);
             }
         } else {
-            volumeMulti<MIXTYPE>(t->mMixerChannelCount, out, outFrames, in, aux,
-                    t->mVolume,
+            volumeMulti<MIXTYPE>(mMixerChannelCount, out, outFrames, in, aux,
+                    mVolume,
 #ifdef FLOAT_AUX
-                    t->mAuxLevel
+                    mAuxLevel
 #else
-                    t->auxLevel
+                    auxLevel
 #endif
             );
         }
     } else {
         if (ramp) {
-            volumeRampMulti<MIXTYPE>(t->mMixerChannelCount, out, outFrames, in, aux,
-                    t->prevVolume, t->volumeInc, &t->prevAuxLevel, t->auxInc);
+            volumeRampMulti<MIXTYPE>(mMixerChannelCount, out, outFrames, in, aux,
+                    prevVolume, volumeInc, &prevAuxLevel, auxInc);
             if (ADJUSTVOL) {
-                t->adjustVolumeRamp(aux != NULL);
+                adjustVolumeRamp(aux != NULL);
             }
         } else {
-            volumeMulti<MIXTYPE>(t->mMixerChannelCount, out, outFrames, in, aux,
-                    t->volume, t->auxLevel);
+            volumeMulti<MIXTYPE>(mMixerChannelCount, out, outFrames, in, aux,
+                    volume, auxLevel);
         }
     }
 }
@@ -1850,19 +1669,18 @@
  * TA: int32_t (Q4.27)
  */
 template <int MIXTYPE, typename TO, typename TI, typename TA>
-void AudioMixer::process_NoResampleOneTrack(state_t* state)
+void AudioMixer::process__noResampleOneTrack()
 {
-    ALOGVV("process_NoResampleOneTrack\n");
-    // CLZ is faster than CTZ on ARM, though really not sure if true after 31 - clz.
-    const int i = 31 - __builtin_clz(state->enabledTracks);
-    ALOG_ASSERT((1 << i) == state->enabledTracks, "more than 1 track enabled");
-    track_t *t = &state->tracks[i];
+    ALOGVV("process__noResampleOneTrack\n");
+    LOG_ALWAYS_FATAL_IF(mEnabled.size() != 1,
+            "%zu != 1 tracks enabled", mEnabled.size());
+    const std::shared_ptr<Track> &t = mTracks[mEnabled[0]];
     const uint32_t channels = t->mMixerChannelCount;
     TO* out = reinterpret_cast<TO*>(t->mainBuffer);
     TA* aux = reinterpret_cast<TA*>(t->auxBuffer);
     const bool ramp = t->needsRamp();
 
-    for (size_t numFrames = state->frameCount; numFrames; ) {
+    for (size_t numFrames = mFrameCount; numFrames > 0; ) {
         AudioBufferProvider::Buffer& b(t->buffer);
         // get input buffer
         b.frameCount = numFrames;
@@ -1874,15 +1692,15 @@
         if (in == NULL || (((uintptr_t)in) & 3)) {
             memset(out, 0, numFrames
                     * channels * audio_bytes_per_sample(t->mMixerFormat));
-            ALOGE_IF((((uintptr_t)in) & 3), "process_NoResampleOneTrack: bus error: "
+            ALOGE_IF((((uintptr_t)in) & 3), "process__noResampleOneTrack: bus error: "
                     "buffer %p track %p, channels %d, needs %#x",
-                    in, t, t->channelCount, t->needs);
+                    in, &t, t->channelCount, t->needs);
             return;
         }
 
         const size_t outFrames = b.frameCount;
-        volumeMix<MIXTYPE, is_same<TI, float>::value /* USEFLOATVOL */, false /* ADJUSTVOL */> (
-                out, outFrames, in, aux, ramp, t);
+        t->volumeMix<MIXTYPE, is_same<TI, float>::value /* USEFLOATVOL */, false /* ADJUSTVOL */> (
+                out, outFrames, in, aux, ramp);
 
         out += outFrames * channels;
         if (aux != NULL) {
@@ -1907,30 +1725,30 @@
  * TA: int32_t (Q4.27) or float
  */
 template <int MIXTYPE, typename TO, typename TI, typename TA>
-void AudioMixer::track__Resample(track_t* t, TO* out, size_t outFrameCount, TO* temp, TA* aux)
+void AudioMixer::Track::track__Resample(TO* out, size_t outFrameCount, TO* temp, TA* aux)
 {
     ALOGVV("track__Resample\n");
-    t->resampler->setSampleRate(t->sampleRate);
-    const bool ramp = t->needsRamp();
+    mResampler->setSampleRate(sampleRate);
+    const bool ramp = needsRamp();
     if (ramp || aux != NULL) {
         // if ramp:        resample with unity gain to temp buffer and scale/mix in 2nd step.
         // if aux != NULL: resample with unity gain to temp buffer then apply send level.
 
-        t->resampler->setVolume(UNITY_GAIN_FLOAT, UNITY_GAIN_FLOAT);
-        memset(temp, 0, outFrameCount * t->mMixerChannelCount * sizeof(TO));
-        t->resampler->resample((int32_t*)temp, outFrameCount, t->bufferProvider);
+        mResampler->setVolume(UNITY_GAIN_FLOAT, UNITY_GAIN_FLOAT);
+        memset(temp, 0, outFrameCount * mMixerChannelCount * sizeof(TO));
+        mResampler->resample((int32_t*)temp, outFrameCount, bufferProvider);
 
         volumeMix<MIXTYPE, is_same<TI, float>::value /* USEFLOATVOL */, true /* ADJUSTVOL */>(
-                out, outFrameCount, temp, aux, ramp, t);
+                out, outFrameCount, temp, aux, ramp);
 
     } else { // constant volume gain
-        t->resampler->setVolume(t->mVolume[0], t->mVolume[1]);
-        t->resampler->resample((int32_t*)out, outFrameCount, t->bufferProvider);
+        mResampler->setVolume(mVolume[0], mVolume[1]);
+        mResampler->resample((int32_t*)out, outFrameCount, bufferProvider);
     }
 }
 
 /* This track hook is called to mix a track, when no resampling is required.
- * The input buffer should be present in t->in.
+ * The input buffer should be present in in.
  *
  * MIXTYPE     (see AudioMixerOps.h MIXTYPE_* enumeration)
  * TO: int32_t (Q4.27) or float
@@ -1938,25 +1756,25 @@
  * TA: int32_t (Q4.27) or float
  */
 template <int MIXTYPE, typename TO, typename TI, typename TA>
-void AudioMixer::track__NoResample(track_t* t, TO* out, size_t frameCount,
-        TO* temp __unused, TA* aux)
+void AudioMixer::Track::track__NoResample(TO* out, size_t frameCount, TO* temp __unused, TA* aux)
 {
     ALOGVV("track__NoResample\n");
-    const TI *in = static_cast<const TI *>(t->in);
+    const TI *in = static_cast<const TI *>(mIn);
 
     volumeMix<MIXTYPE, is_same<TI, float>::value /* USEFLOATVOL */, true /* ADJUSTVOL */>(
-            out, frameCount, in, aux, t->needsRamp(), t);
+            out, frameCount, in, aux, needsRamp());
 
     // MIXTYPE_MONOEXPAND reads a single input channel and expands to NCHAN output channels.
     // MIXTYPE_MULTI reads NCHAN input channels and places to NCHAN output channels.
-    in += (MIXTYPE == MIXTYPE_MONOEXPAND) ? frameCount : frameCount * t->mMixerChannelCount;
-    t->in = in;
+    in += (MIXTYPE == MIXTYPE_MONOEXPAND) ? frameCount : frameCount * mMixerChannelCount;
+    mIn = in;
 }
 
 /* The Mixer engine generates either int32_t (Q4_27) or float data.
  * We use this function to convert the engine buffers
  * to the desired mixer output format, either int16_t (Q.15) or float.
  */
+/* static */
 void AudioMixer::convertMixerFormat(void *out, audio_format_t mixerOutFormat,
         void *in, audio_format_t mixerInFormat, size_t sampleCount)
 {
@@ -1995,19 +1813,20 @@
 
 /* Returns the proper track hook to use for mixing the track into the output buffer.
  */
-AudioMixer::hook_t AudioMixer::getTrackHook(int trackType, uint32_t channelCount,
+/* static */
+AudioMixer::hook_t AudioMixer::Track::getTrackHook(int trackType, uint32_t channelCount,
         audio_format_t mixerInFormat, audio_format_t mixerOutFormat __unused)
 {
     if (!kUseNewMixer && channelCount == FCC_2 && mixerInFormat == AUDIO_FORMAT_PCM_16_BIT) {
         switch (trackType) {
         case TRACKTYPE_NOP:
-            return track__nop;
+            return &Track::track__nop;
         case TRACKTYPE_RESAMPLE:
-            return track__genericResample;
+            return &Track::track__genericResample;
         case TRACKTYPE_NORESAMPLEMONO:
-            return track__16BitsMono;
+            return &Track::track__16BitsMono;
         case TRACKTYPE_NORESAMPLE:
-            return track__16BitsStereo;
+            return &Track::track__16BitsStereo;
         default:
             LOG_ALWAYS_FATAL("bad trackType: %d", trackType);
             break;
@@ -2016,14 +1835,14 @@
     LOG_ALWAYS_FATAL_IF(channelCount > MAX_NUM_CHANNELS);
     switch (trackType) {
     case TRACKTYPE_NOP:
-        return track__nop;
+        return &Track::track__nop;
     case TRACKTYPE_RESAMPLE:
         switch (mixerInFormat) {
         case AUDIO_FORMAT_PCM_FLOAT:
-            return (AudioMixer::hook_t)track__Resample<
+            return (AudioMixer::hook_t) &Track::track__Resample<
                     MIXTYPE_MULTI, float /*TO*/, float /*TI*/, TYPE_AUX>;
         case AUDIO_FORMAT_PCM_16_BIT:
-            return (AudioMixer::hook_t)track__Resample<
+            return (AudioMixer::hook_t) &Track::track__Resample<
                     MIXTYPE_MULTI, int32_t /*TO*/, int16_t /*TI*/, TYPE_AUX>;
         default:
             LOG_ALWAYS_FATAL("bad mixerInFormat: %#x", mixerInFormat);
@@ -2033,10 +1852,10 @@
     case TRACKTYPE_NORESAMPLEMONO:
         switch (mixerInFormat) {
         case AUDIO_FORMAT_PCM_FLOAT:
-            return (AudioMixer::hook_t)track__NoResample<
+            return (AudioMixer::hook_t) &Track::track__NoResample<
                             MIXTYPE_MONOEXPAND, float /*TO*/, float /*TI*/, TYPE_AUX>;
         case AUDIO_FORMAT_PCM_16_BIT:
-            return (AudioMixer::hook_t)track__NoResample<
+            return (AudioMixer::hook_t) &Track::track__NoResample<
                             MIXTYPE_MONOEXPAND, int32_t /*TO*/, int16_t /*TI*/, TYPE_AUX>;
         default:
             LOG_ALWAYS_FATAL("bad mixerInFormat: %#x", mixerInFormat);
@@ -2046,10 +1865,10 @@
     case TRACKTYPE_NORESAMPLE:
         switch (mixerInFormat) {
         case AUDIO_FORMAT_PCM_FLOAT:
-            return (AudioMixer::hook_t)track__NoResample<
+            return (AudioMixer::hook_t) &Track::track__NoResample<
                     MIXTYPE_MULTI, float /*TO*/, float /*TI*/, TYPE_AUX>;
         case AUDIO_FORMAT_PCM_16_BIT:
-            return (AudioMixer::hook_t)track__NoResample<
+            return (AudioMixer::hook_t) &Track::track__NoResample<
                     MIXTYPE_MULTI, int32_t /*TO*/, int16_t /*TI*/, TYPE_AUX>;
         default:
             LOG_ALWAYS_FATAL("bad mixerInFormat: %#x", mixerInFormat);
@@ -2070,7 +1889,9 @@
  * a stereo output track, the input track cannot be MONO.  This should be
  * prevented by the caller.
  */
-AudioMixer::process_hook_t AudioMixer::getProcessHook(int processType, uint32_t channelCount,
+/* static */
+AudioMixer::process_hook_t AudioMixer::getProcessHook(
+        int processType, uint32_t channelCount,
         audio_format_t mixerInFormat, audio_format_t mixerOutFormat)
 {
     if (processType != PROCESSTYPE_NORESAMPLEONETRACK) { // Only NORESAMPLEONETRACK
@@ -2078,17 +1899,17 @@
         return NULL;
     }
     if (!kUseNewMixer && channelCount == FCC_2 && mixerInFormat == AUDIO_FORMAT_PCM_16_BIT) {
-        return process__OneTrack16BitsStereoNoResampling;
+        return &AudioMixer::process__oneTrack16BitsStereoNoResampling;
     }
     LOG_ALWAYS_FATAL_IF(channelCount > MAX_NUM_CHANNELS);
     switch (mixerInFormat) {
     case AUDIO_FORMAT_PCM_FLOAT:
         switch (mixerOutFormat) {
         case AUDIO_FORMAT_PCM_FLOAT:
-            return process_NoResampleOneTrack<
+            return &AudioMixer::process__noResampleOneTrack<
                     MIXTYPE_MULTI_SAVEONLY, float /*TO*/, float /*TI*/, TYPE_AUX>;
         case AUDIO_FORMAT_PCM_16_BIT:
-            return process_NoResampleOneTrack<
+            return &AudioMixer::process__noResampleOneTrack<
                     MIXTYPE_MULTI_SAVEONLY, int16_t /*TO*/, float /*TI*/, TYPE_AUX>;
         default:
             LOG_ALWAYS_FATAL("bad mixerOutFormat: %#x", mixerOutFormat);
@@ -2098,10 +1919,10 @@
     case AUDIO_FORMAT_PCM_16_BIT:
         switch (mixerOutFormat) {
         case AUDIO_FORMAT_PCM_FLOAT:
-            return process_NoResampleOneTrack<
+            return &AudioMixer::process__noResampleOneTrack<
                     MIXTYPE_MULTI_SAVEONLY, float /*TO*/, int16_t /*TI*/, TYPE_AUX>;
         case AUDIO_FORMAT_PCM_16_BIT:
-            return process_NoResampleOneTrack<
+            return &AudioMixer::process__noResampleOneTrack<
                     MIXTYPE_MULTI_SAVEONLY, int16_t /*TO*/, int16_t /*TI*/, TYPE_AUX>;
         default:
             LOG_ALWAYS_FATAL("bad mixerOutFormat: %#x", mixerOutFormat);
diff --git a/media/libmedia/include/media/CounterMetric.h b/media/libmedia/include/media/CounterMetric.h
index f39ca7c..b53470d 100644
--- a/media/libmedia/include/media/CounterMetric.h
+++ b/media/libmedia/include/media/CounterMetric.h
@@ -16,6 +16,10 @@
 #ifndef ANDROID_COUNTER_METRIC_H_
 #define ANDROID_COUNTER_METRIC_H_
 
+#include <functional>
+#include <map>
+#include <string>
+
 #include <media/MediaAnalyticsItem.h>
 #include <utils/Log.h>
 
@@ -71,13 +75,13 @@
   // of Attribute.
   void ExportValues(
       std::function<void (const AttributeType&,
-                          const int64_t count)> function) {
+                          const int64_t count)> function) const {
     for (auto it = values_.begin(); it != values_.end(); it++) {
       function(it->first, it->second);
     }
   }
 
-  const std::string& metric_name() { return metric_name_; };
+  const std::string& metric_name() const { return metric_name_; };
 
  private:
   const std::string metric_name_;
diff --git a/media/libmedia/include/media/DrmHal.h b/media/libmedia/include/media/DrmHal.h
index f2b25cd..c18d845 100644
--- a/media/libmedia/include/media/DrmHal.h
+++ b/media/libmedia/include/media/DrmHal.h
@@ -23,7 +23,7 @@
 #include <android/hardware/drm/1.0/IDrmPluginListener.h>
 #include <android/hardware/drm/1.0/IDrmFactory.h>
 
-#include <media/CounterMetric.h>
+#include <media/DrmMetrics.h>
 #include <media/IDrm.h>
 #include <media/IDrmClient.h>
 #include <media/MediaAnalyticsItem.h>
@@ -181,7 +181,8 @@
     sp<IDrmPlugin> mPlugin;
     sp<drm::V1_1::IDrmPlugin> mPluginV1_1;
 
-    CounterMetric<status_t> mOpenSessionCounter;
+    // Mutable to allow modification within GetPropertyByteArray.
+    mutable MediaDrmMetrics mMetrics;
 
     Vector<Vector<uint8_t>> mOpenSessions;
     void closeOpenSessions();
diff --git a/media/libmedia/include/media/DrmMetrics.h b/media/libmedia/include/media/DrmMetrics.h
new file mode 100644
index 0000000..bb7509b
--- /dev/null
+++ b/media/libmedia/include/media/DrmMetrics.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef DRM_METRICS_H_
+#define DRM_METRICS_H_
+
+#include <map>
+
+#include <android/hardware/drm/1.0/types.h>
+#include <media/CounterMetric.h>
+#include <media/EventMetric.h>
+
+namespace android {
+
+/**
+ * This class contains the definition of metrics captured within MediaDrm.
+ * It also contains a method for exporting all of the metrics to a
+ * MediaAnalyticsItem instance.
+ */
+class MediaDrmMetrics {
+ public:
+  explicit MediaDrmMetrics();
+  // Count of openSession calls.
+  CounterMetric<status_t> mOpenSessionCounter;
+  // Count of closeSession calls.
+  CounterMetric<status_t> mCloseSessionCounter;
+  // Count and timing of getKeyRequest calls.
+  EventMetric<status_t> mGetKeyRequestTiming;
+  // Count and timing of provideKeyResponse calls.
+  EventMetric<status_t> mProvideKeyResponseTiming;
+  // Count of getProvisionRequest calls.
+  CounterMetric<status_t> mGetProvisionRequestCounter;
+  // Count of provideProvisionResponse calls.
+  CounterMetric<status_t> mProvideProvisionResponseCounter;
+
+  // Count of key status events broken out by status type.
+  CounterMetric<::android::hardware::drm::V1_0::KeyStatusType>
+      mKeyStatusChangeCounter;
+  // Count of events broken out by event type
+  CounterMetric<::android::hardware::drm::V1_0::EventType> mEventCounter;
+
+  // Count getPropertyByteArray calls to retrieve the device unique id.
+  CounterMetric<status_t> mGetDeviceUniqueIdCounter;
+
+  // TODO: Add session start and end time support. These are a special case.
+
+  // Export the metrics to a MediaAnalyticsItem.
+  void Export(MediaAnalyticsItem* item);
+};
+
+}  // namespace android
+
+#endif  // DRM_METRICS_H_
diff --git a/media/libmedia/include/media/EventMetric.h b/media/libmedia/include/media/EventMetric.h
new file mode 100644
index 0000000..dbb736a
--- /dev/null
+++ b/media/libmedia/include/media/EventMetric.h
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef ANDROID_EVENT_METRIC_H_
+#define ANDROID_EVENT_METRIC_H_
+
+#include <media/MediaAnalyticsItem.h>
+#include <utils/Timers.h>
+
+namespace android {
+
+// This is a simple holder for the statistics recorded in EventMetric.
+struct EventStatistics {
+  // The count of times the event occurred.
+  int64_t count;
+
+  // The minimum and maximum values recorded in the Record method.
+  double min;
+  double max;
+
+  // The average (mean) of all values recorded.
+  double mean;
+  // The sum of squared devation. Variance can be calculated from
+  // this value.
+  //    var = sum_squared_deviation / count;
+  double sum_squared_deviation;
+};
+
+// The EventMetric class is used to accumulate stats about an event over time.
+// A common use case is to track clock timings for a method call or operation.
+// An EventMetric can break down stats by a dimension specified by the
+// application. E.g. an application may want to track counts broken out by
+// error code or the size of some parameter.
+//
+// Example:
+//
+//   struct C {
+//     status_t DoWork() {
+//       unsigned long start_time = now();
+//       status_t result;
+//
+//       // DO WORK and determine result;
+//
+//       work_event_.Record(now() - start_time, result);
+//
+//       return result;
+//     }
+//     EventMetric<status_t> work_event_;
+//   };
+//
+//   C c;
+//   c.DoWork();
+//
+//   std::map<int, int64_t> values;
+//   metric.ExportValues(
+//       [&] (int attribute_value, int64_t value) {
+//            values[attribute_value] = value;
+//       });
+//   // Do something with the exported stat.
+//
+template<typename AttributeType>
+class EventMetric {
+ public:
+  // Instantiate the counter with the given metric name and
+  // attribute names. |attribute_names| must not be null.
+  EventMetric(
+      const std::string& metric_name,
+      const std::string& attribute_name)
+          : metric_name_(metric_name),
+            attribute_name_(attribute_name) {}
+
+  // Increment the count of times the operation occurred with this
+  // combination of attributes.
+  void Record(double value, AttributeType attribute) {
+    if (values_.find(attribute) != values_.end()) {
+      EventStatistics* stats = values_[attribute].get();
+      // Using method of provisional means.
+      double deviation = value - stats->mean;
+      stats->mean = stats->mean + (deviation / stats->count);
+      stats->sum_squared_deviation =
+          stats->sum_squared_deviation + (deviation * (value - stats->mean));
+      stats->count++;
+
+      stats->min = stats->min < value ? stats->min : value;
+      stats->max = stats->max > value ? stats->max : value;
+    } else {
+      std::unique_ptr<EventStatistics> stats =
+          std::make_unique<EventStatistics>();
+      stats->count = 1;
+      stats->min = value;
+      stats->max = value;
+      stats->mean = value;
+      stats->sum_squared_deviation = 0;
+      values_[attribute] = std::move(stats);
+    }
+  };
+
+  // Export the metrics to the provided |function|. Each value for Attribute
+  // has a separate set of stats. As such, |function| will be called once per
+  // value of Attribute.
+  void ExportValues(
+      std::function<void (const AttributeType&,
+                          const EventStatistics&)> function) const {
+    for (auto it = values_.begin(); it != values_.end(); it++) {
+      function(it->first, *(it->second));
+    }
+  }
+
+  const std::string& metric_name() const { return metric_name_; };
+
+ private:
+  const std::string metric_name_;
+  const std::string attribute_name_;
+  std::map<AttributeType, std::unique_ptr<struct EventStatistics>> values_;
+};
+
+// The EventTimer is a supporting class for EventMetric instances that are used
+// to time methods. The EventTimer starts a timer when first in scope, and
+// records the timing when exiting scope.
+//
+// Example:
+//
+// EventMetric<int> my_metric;
+//
+// {
+//   EventTimer<int> my_timer(&my_metric);
+//   // Set the attribute to associate with this timing.
+//   my_timer.SetAttribtue(42);
+//
+//   // Do some work that you want to time.
+//
+// }  // The EventTimer destructor will record the the timing in my_metric;
+//
+template<typename AttributeType>
+class EventTimer {
+ public:
+  explicit EventTimer(EventMetric<AttributeType>* metric)
+      :start_time_(systemTime()), metric_(metric) {
+  }
+
+  virtual ~EventTimer() {
+    if (metric_) {
+      metric_->Record(ns2us(systemTime() - start_time_), attribute_);
+    }
+  }
+
+  // Set the attribute to associate with this timing. E.g. this can be used to
+  // record the return code from the work that was timed.
+  void SetAttribute(const AttributeType& attribute) {
+    attribute_ = attribute;
+  }
+
+ protected:
+  // Visible for testing only.
+  nsecs_t start_time_;
+
+ private:
+  EventMetric<AttributeType>* metric_;
+  AttributeType attribute_;
+};
+
+}  // namespace android
+
+#endif  // ANDROID_EVENT_METRIC_H_
diff --git a/media/libmedia/nuplayer2/NuPlayer2Driver.cpp b/media/libmedia/nuplayer2/NuPlayer2Driver.cpp
index 629a7eb..ccfcc47 100644
--- a/media/libmedia/nuplayer2/NuPlayer2Driver.cpp
+++ b/media/libmedia/nuplayer2/NuPlayer2Driver.cpp
@@ -77,7 +77,7 @@
 };
 
 // key for media statistics
-static const char *kKeyPlayer = "nuplayer2";
+static const char *kKeyPlayer = "nuplayer";
 // attrs for media statistics
 static const char *kPlayerVMime = "android.media.mediaplayer.video.mime";
 static const char *kPlayerVCodec = "android.media.mediaplayer.video.codec";
@@ -666,7 +666,7 @@
 
         // re-init in case we prepare() and start() again.
         delete mAnalyticsItem ;
-        mAnalyticsItem = new MediaAnalyticsItem("nuplayer");
+        mAnalyticsItem = new MediaAnalyticsItem(kKeyPlayer);
         if (mAnalyticsItem) {
             mAnalyticsItem->generateSessionID();
             mAnalyticsItem->setUid(mClientUid);
diff --git a/media/libstagefright/ACodec.cpp b/media/libstagefright/ACodec.cpp
index 0ded5be..541093a 100644
--- a/media/libstagefright/ACodec.cpp
+++ b/media/libstagefright/ACodec.cpp
@@ -126,6 +126,32 @@
     }
 }
 
+static OMX_VIDEO_CONTROLRATETYPE getVideoBitrateMode(const sp<AMessage> &msg) {
+    int32_t tmp;
+    if (msg->findInt32("bitrate-mode", &tmp)) {
+        // explicitly translate from MediaCodecInfo.EncoderCapabilities.
+        // BITRATE_MODE_* into OMX bitrate mode.
+        switch (tmp) {
+            //BITRATE_MODE_CQ
+            case 0: return OMX_Video_ControlRateConstantQuality;
+            //BITRATE_MODE_VBR
+            case 1: return OMX_Video_ControlRateVariable;
+            //BITRATE_MODE_CBR
+            case 2: return OMX_Video_ControlRateConstant;
+            default: break;
+        }
+    }
+    return OMX_Video_ControlRateVariable;
+}
+
+static bool findVideoBitrateControlInfo(const sp<AMessage> &msg,
+        OMX_VIDEO_CONTROLRATETYPE *mode, int32_t *bitrate, int32_t *quality) {
+    *mode = getVideoBitrateMode(msg);
+    bool isCQ = (*mode == OMX_Video_ControlRateConstantQuality);
+    return (!isCQ && msg->findInt32("bitrate", bitrate))
+         || (isCQ && msg->findInt32("quality", quality));
+}
+
 struct MessageList : public RefBase {
     MessageList() {
     }
@@ -1686,6 +1712,7 @@
     mConfigFormat = msg;
 
     mIsEncoder = encoder;
+    mIsVideo = !strncasecmp(mime, "video/", 6);
 
     mPortMode[kPortIndexInput] = IOMX::kPortModePresetByteBuffer;
     mPortMode[kPortIndexOutput] = IOMX::kPortModePresetByteBuffer;
@@ -1696,19 +1723,26 @@
         return err;
     }
 
-    int32_t bitRate = 0;
-    // FLAC encoder doesn't need a bitrate, other encoders do
-    if (encoder && strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_FLAC)
-            && !msg->findInt32("bitrate", &bitRate)) {
-        return INVALID_OPERATION;
+    OMX_VIDEO_CONTROLRATETYPE bitrateMode;
+    int32_t bitrate = 0, quality;
+    // FLAC encoder or video encoder in constant quality mode doesn't need a
+    // bitrate, other encoders do.
+    if (encoder) {
+        if (mIsVideo && !findVideoBitrateControlInfo(
+                msg, &bitrateMode, &bitrate, &quality)) {
+            return INVALID_OPERATION;
+        } else if (!mIsVideo && strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_FLAC)
+            && !msg->findInt32("bitrate", &bitrate)) {
+            return INVALID_OPERATION;
+        }
     }
 
     // propagate bitrate to the output so that the muxer has it
-    if (encoder && msg->findInt32("bitrate", &bitRate)) {
+    if (encoder && msg->findInt32("bitrate", &bitrate)) {
         // Technically ISO spec says that 'bitrate' should be 0 for VBR even though it is the
         // average bitrate. We've been setting both bitrate and max-bitrate to this same value.
-        outputFormat->setInt32("bitrate", bitRate);
-        outputFormat->setInt32("max-bitrate", bitRate);
+        outputFormat->setInt32("bitrate", bitrate);
+        outputFormat->setInt32("max-bitrate", bitrate);
     }
 
     int32_t storeMeta;
@@ -1765,9 +1799,7 @@
     // Only enable metadata mode on encoder output if encoder can prepend
     // sps/pps to idr frames, since in metadata mode the bitstream is in an
     // opaque handle, to which we don't have access.
-    int32_t video = !strncasecmp(mime, "video/", 6);
-    mIsVideo = video;
-    if (encoder && video) {
+    if (encoder && mIsVideo) {
         OMX_BOOL enable = (OMX_BOOL) (prependSPSPPS
             && msg->findInt32("android._store-metadata-in-buffers-output", &storeMeta)
             && storeMeta != 0);
@@ -1813,9 +1845,9 @@
     // NOTE: we only use native window for video decoders
     sp<RefBase> obj;
     bool haveNativeWindow = msg->findObject("native-window", &obj)
-            && obj != NULL && video && !encoder;
+            && obj != NULL && mIsVideo && !encoder;
     mUsingNativeWindow = haveNativeWindow;
-    if (video && !encoder) {
+    if (mIsVideo && !encoder) {
         inputFormat->setInt32("adaptive-playback", false);
 
         int32_t usageProtected;
@@ -1978,7 +2010,7 @@
     (void)msg->findInt32("pcm-encoding", (int32_t*)&pcmEncoding);
     // invalid encodings will default to PCM-16bit in setupRawAudioFormat.
 
-    if (video) {
+    if (mIsVideo) {
         // determine need for software renderer
         bool usingSwRenderer = false;
         if (haveNativeWindow && mComponentName.startsWith("OMX.google.")) {
@@ -2112,14 +2144,14 @@
             }
 
             err = setupAACCodec(
-                    encoder, numChannels, sampleRate, bitRate, aacProfile,
+                    encoder, numChannels, sampleRate, bitrate, aacProfile,
                     isADTS != 0, sbrMode, maxOutputChannelCount, drc,
                     pcmLimiterEnable);
         }
     } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB)) {
-        err = setupAMRCodec(encoder, false /* isWAMR */, bitRate);
+        err = setupAMRCodec(encoder, false /* isWAMR */, bitrate);
     } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) {
-        err = setupAMRCodec(encoder, true /* isWAMR */, bitRate);
+        err = setupAMRCodec(encoder, true /* isWAMR */, bitrate);
     } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_G711_ALAW)
             || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_G711_MLAW)) {
         // These are PCM-like formats with a fixed sample rate but
@@ -2233,7 +2265,7 @@
         rateFloat = (float)rateInt;  // 16MHz (FLINTMAX) is OK for upper bound.
     }
     if (rateFloat > 0) {
-        err = setOperatingRate(rateFloat, video);
+        err = setOperatingRate(rateFloat, mIsVideo);
         err = OK; // ignore errors
     }
 
@@ -2258,7 +2290,7 @@
     }
 
     // create data converters if needed
-    if (!video && err == OK) {
+    if (!mIsVideo && err == OK) {
         AudioEncoding codecPcmEncoding = kAudioEncodingPcm16bit;
         if (encoder) {
             (void)mInputFormat->findInt32("pcm-encoding", (int32_t*)&codecPcmEncoding);
@@ -3709,10 +3741,12 @@
         return err;
     }
 
-    int32_t width, height, bitrate;
+    OMX_VIDEO_CONTROLRATETYPE bitrateMode;
+    int32_t width, height, bitrate = 0, quality;
     if (!msg->findInt32("width", &width)
             || !msg->findInt32("height", &height)
-            || !msg->findInt32("bitrate", &bitrate)) {
+            || !findVideoBitrateControlInfo(
+                    msg, &bitrateMode, &bitrate, &quality)) {
         return INVALID_OPERATION;
     }
 
@@ -3965,15 +3999,6 @@
     return ret > 0 ? ret - 1 : 0;
 }
 
-static OMX_VIDEO_CONTROLRATETYPE getBitrateMode(const sp<AMessage> &msg) {
-    int32_t tmp;
-    if (!msg->findInt32("bitrate-mode", &tmp)) {
-        return OMX_Video_ControlRateVariable;
-    }
-
-    return static_cast<OMX_VIDEO_CONTROLRATETYPE>(tmp);
-}
-
 status_t ACodec::setupMPEG4EncoderParameters(const sp<AMessage> &msg) {
     int32_t bitrate;
     float iFrameInterval;
@@ -3982,7 +4007,7 @@
         return INVALID_OPERATION;
     }
 
-    OMX_VIDEO_CONTROLRATETYPE bitrateMode = getBitrateMode(msg);
+    OMX_VIDEO_CONTROLRATETYPE bitrateMode = getVideoBitrateMode(msg);
 
     float frameRate;
     if (!msg->findFloat("frame-rate", &frameRate)) {
@@ -4047,7 +4072,7 @@
         return err;
     }
 
-    err = configureBitrate(bitrate, bitrateMode);
+    err = configureBitrate(bitrateMode, bitrate);
 
     if (err != OK) {
         return err;
@@ -4064,7 +4089,7 @@
         return INVALID_OPERATION;
     }
 
-    OMX_VIDEO_CONTROLRATETYPE bitrateMode = getBitrateMode(msg);
+    OMX_VIDEO_CONTROLRATETYPE bitrateMode = getVideoBitrateMode(msg);
 
     float frameRate;
     if (!msg->findFloat("frame-rate", &frameRate)) {
@@ -4124,7 +4149,7 @@
         return err;
     }
 
-    err = configureBitrate(bitrate, bitrateMode);
+    err = configureBitrate(bitrateMode, bitrate);
 
     if (err != OK) {
         return err;
@@ -4194,7 +4219,7 @@
         return INVALID_OPERATION;
     }
 
-    OMX_VIDEO_CONTROLRATETYPE bitrateMode = getBitrateMode(msg);
+    OMX_VIDEO_CONTROLRATETYPE bitrateMode = getVideoBitrateMode(msg);
 
     float frameRate;
     if (!msg->findFloat("frame-rate", &frameRate)) {
@@ -4350,18 +4375,20 @@
         }
     }
 
-    return configureBitrate(bitrate, bitrateMode);
+    return configureBitrate(bitrateMode, bitrate);
 }
 
 status_t ACodec::setupHEVCEncoderParameters(const sp<AMessage> &msg) {
-    int32_t bitrate;
     float iFrameInterval;
-    if (!msg->findInt32("bitrate", &bitrate)
-            || !msg->findAsFloat("i-frame-interval", &iFrameInterval)) {
+    if (!msg->findAsFloat("i-frame-interval", &iFrameInterval)) {
         return INVALID_OPERATION;
     }
 
-    OMX_VIDEO_CONTROLRATETYPE bitrateMode = getBitrateMode(msg);
+    OMX_VIDEO_CONTROLRATETYPE bitrateMode;
+    int32_t bitrate, quality;
+    if (!findVideoBitrateControlInfo(msg, &bitrateMode, &bitrate, &quality)) {
+        return INVALID_OPERATION;
+    }
 
     float frameRate;
     if (!msg->findFloat("frame-rate", &frameRate)) {
@@ -4407,7 +4434,7 @@
         return err;
     }
 
-    return configureBitrate(bitrate, bitrateMode);
+    return configureBitrate(bitrateMode, bitrate, quality);
 }
 
 status_t ACodec::setupVPXEncoderParameters(const sp<AMessage> &msg, sp<AMessage> &outputFormat) {
@@ -4428,7 +4455,7 @@
     }
     msg->findAsFloat("i-frame-interval", &iFrameInterval);
 
-    OMX_VIDEO_CONTROLRATETYPE bitrateMode = getBitrateMode(msg);
+    OMX_VIDEO_CONTROLRATETYPE bitrateMode = getVideoBitrateMode(msg);
 
     float frameRate;
     if (!msg->findFloat("frame-rate", &frameRate)) {
@@ -4505,7 +4532,7 @@
         }
     }
 
-    return configureBitrate(bitrate, bitrateMode);
+    return configureBitrate(bitrateMode, bitrate);
 }
 
 status_t ACodec::verifySupportForProfileAndLevel(
@@ -4541,7 +4568,7 @@
 }
 
 status_t ACodec::configureBitrate(
-        int32_t bitrate, OMX_VIDEO_CONTROLRATETYPE bitrateMode) {
+        OMX_VIDEO_CONTROLRATETYPE bitrateMode, int32_t bitrate, int32_t quality) {
     OMX_VIDEO_PARAM_BITRATETYPE bitrateType;
     InitOMXParams(&bitrateType);
     bitrateType.nPortIndex = kPortIndexOutput;
@@ -4554,7 +4581,13 @@
     }
 
     bitrateType.eControlRate = bitrateMode;
-    bitrateType.nTargetBitrate = bitrate;
+
+    // write it out explicitly even if it's a union
+    if (bitrateMode == OMX_Video_ControlRateConstantQuality) {
+        bitrateType.nQualityFactor = quality;
+    } else {
+        bitrateType.nTargetBitrate = bitrate;
+    }
 
     return mOMXNode->setParameter(
             OMX_IndexParamVideoBitrate, &bitrateType, sizeof(bitrateType));
diff --git a/media/libstagefright/Android.bp b/media/libstagefright/Android.bp
index 01f73a1..90f6ed7 100644
--- a/media/libstagefright/Android.bp
+++ b/media/libstagefright/Android.bp
@@ -105,6 +105,7 @@
         "libmedia_helper",
         "libstagefright_codec2",
         "libstagefright_foundation",
+        "libstagefright_gbs",
         "libstagefright_omx",
         "libstagefright_omx_utils",
         "libstagefright_xmlparser",
diff --git a/media/libstagefright/CCodec.cpp b/media/libstagefright/CCodec.cpp
index 0103abd..b058f37 100644
--- a/media/libstagefright/CCodec.cpp
+++ b/media/libstagefright/CCodec.cpp
@@ -23,7 +23,9 @@
 #include <C2PlatformSupport.h>
 
 #include <gui/Surface.h>
+#include <media/stagefright/BufferProducerWrapper.h>
 #include <media/stagefright/CCodec.h>
+#include <media/stagefright/PersistentSurface.h>
 
 #include "include/CCodecBufferChannel.h"
 
@@ -111,33 +113,35 @@
 
 class CCodecListener : public C2Component::Listener {
 public:
-    CCodecListener(const std::shared_ptr<CCodecBufferChannel> &channel)
-        : mChannel(channel) {
-    }
+    explicit CCodecListener(const wp<CCodec> &codec) : mCodec(codec) {}
 
     virtual void onWorkDone_nb(
             std::weak_ptr<C2Component> component,
             std::vector<std::unique_ptr<C2Work>> workItems) override {
-        (void) component;
-        mChannel->onWorkDone(std::move(workItems));
+        (void)component;
+        sp<CCodec> codec(mCodec.promote());
+        if (!codec) {
+            return;
+        }
+        codec->onWorkDone(workItems);
     }
 
     virtual void onTripped_nb(
             std::weak_ptr<C2Component> component,
             std::vector<std::shared_ptr<C2SettingResult>> settingResult) override {
         // TODO
-        (void) component;
-        (void) settingResult;
+        (void)component;
+        (void)settingResult;
     }
 
     virtual void onError_nb(std::weak_ptr<C2Component> component, uint32_t errorCode) override {
         // TODO
-        (void) component;
-        (void) errorCode;
+        (void)component;
+        (void)errorCode;
     }
 
 private:
-    std::shared_ptr<CCodecBufferChannel> mChannel;
+    wp<CCodec> mCodec;
 };
 
 }  // namespace
@@ -159,11 +163,11 @@
 void CCodec::initiateAllocateComponent(const sp<AMessage> &msg) {
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != RELEASED) {
+        if (state->get() != RELEASED) {
             mCallback->onError(INVALID_OPERATION, ACTION_CODE_FATAL);
             return;
         }
-        state->mState = ALLOCATING;
+        state->set(ALLOCATING);
     }
 
     AString componentName;
@@ -178,14 +182,14 @@
 
 void CCodec::allocate(const AString &componentName) {
     // TODO: use C2ComponentStore to create component
-    mListener.reset(new CCodecListener(mChannel));
+    mListener.reset(new CCodecListener(this));
 
     std::shared_ptr<C2Component> comp;
     c2_status_t err = GetCodec2PlatformComponentStore()->createComponent(
             componentName.c_str(), &comp);
     if (err != C2_OK) {
         Mutexed<State>::Locked state(mState);
-        state->mState = RELEASED;
+        state->set(RELEASED);
         state.unlock();
         mCallback->onError(err, ACTION_CODE_FATAL);
         state.lock();
@@ -194,15 +198,15 @@
     comp->setListener_vb(mListener, C2_MAY_BLOCK);
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != ALLOCATING) {
-            state->mState = RELEASED;
+        if (state->get() != ALLOCATING) {
+            state->set(RELEASED);
             state.unlock();
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             state.lock();
             return;
         }
-        state->mState = ALLOCATED;
-        state->mComp = comp;
+        state->set(ALLOCATED);
+        state->comp = comp;
     }
     mChannel->setComponent(comp);
     mCallback->onComponentAllocated(comp->intf()->getName().c_str());
@@ -211,7 +215,7 @@
 void CCodec::initiateConfigureComponent(const sp<AMessage> &format) {
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != ALLOCATED) {
+        if (state->get() != ALLOCATED) {
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             return;
         }
@@ -252,6 +256,9 @@
                 inputFormat->setInt32("sample-rate", 44100);
                 outputFormat->setInt32("channel-count", 1);
                 outputFormat->setInt32("sample-rate", 44100);
+            } else {
+                outputFormat->setInt32("width", 1080);
+                outputFormat->setInt32("height", 1920);
             }
         } else {
             inputFormat->setString("mime", mime);
@@ -272,32 +279,81 @@
 
     {
         Mutexed<Formats>::Locked formats(mFormats);
-        formats->mInputFormat = inputFormat;
-        formats->mOutputFormat = outputFormat;
+        formats->inputFormat = inputFormat;
+        formats->outputFormat = outputFormat;
     }
     mCallback->onComponentConfigured(inputFormat, outputFormat);
 }
 
-
 void CCodec::initiateCreateInputSurface() {
-    // TODO
+    (new AMessage(kWhatCreateInputSurface, this))->post();
+}
+
+void CCodec::createInputSurface() {
+    sp<IGraphicBufferProducer> producer;
+    sp<GraphicBufferSource> source(new GraphicBufferSource);
+
+    status_t err = source->initCheck();
+    if (err != OK) {
+        ALOGE("Failed to initialize graphic buffer source: %d", err);
+        mCallback->onInputSurfaceCreationFailed(err);
+        return;
+    }
+    producer = source->getIGraphicBufferProducer();
+
+    err = setupInputSurface(source);
+    if (err != OK) {
+        ALOGE("Failed to set up input surface: %d", err);
+        mCallback->onInputSurfaceCreationFailed(err);
+        return;
+    }
+
+    sp<AMessage> inputFormat;
+    sp<AMessage> outputFormat;
+    {
+        Mutexed<Formats>::Locked formats(mFormats);
+        inputFormat = formats->inputFormat;
+        outputFormat = formats->outputFormat;
+    }
+    mCallback->onInputSurfaceCreated(
+            inputFormat,
+            outputFormat,
+            new BufferProducerWrapper(producer));
+}
+
+status_t CCodec::setupInputSurface(const sp<GraphicBufferSource> &source) {
+    status_t err = mChannel->setGraphicBufferSource(source);
+    if (err != OK) {
+        return err;
+    }
+
+    // TODO: configure |source| with other settings.
+    return OK;
 }
 
 void CCodec::initiateSetInputSurface(const sp<PersistentSurface> &surface) {
+    sp<AMessage> msg = new AMessage(kWhatSetInputSurface, this);
+    msg->setObject("surface", surface);
+    msg->post();
+}
+
+void CCodec::setInputSurface(const sp<PersistentSurface> &surface) {
     // TODO
-    (void) surface;
+    (void)surface;
+
+    mCallback->onInputSurfaceDeclined(ERROR_UNSUPPORTED);
 }
 
 void CCodec::initiateStart() {
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != ALLOCATED) {
+        if (state->get() != ALLOCATED) {
             state.unlock();
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             state.lock();
             return;
         }
-        state->mState = STARTING;
+        state->set(STARTING);
     }
 
     (new AMessage(kWhatStart, this))->post();
@@ -307,13 +363,13 @@
     std::shared_ptr<C2Component> comp;
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != STARTING) {
+        if (state->get() != STARTING) {
             state.unlock();
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             state.lock();
             return;
         }
-        comp = state->mComp;
+        comp = state->comp;
     }
     c2_status_t err = comp->start();
     if (err != C2_OK) {
@@ -325,20 +381,20 @@
     sp<AMessage> outputFormat;
     {
         Mutexed<Formats>::Locked formats(mFormats);
-        inputFormat = formats->mInputFormat;
-        outputFormat = formats->mOutputFormat;
+        inputFormat = formats->inputFormat;
+        outputFormat = formats->outputFormat;
     }
     mChannel->start(inputFormat, outputFormat);
 
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != STARTING) {
+        if (state->get() != STARTING) {
             state.unlock();
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             state.lock();
             return;
         }
-        state->mState = RUNNING;
+        state->set(RUNNING);
     }
     mCallback->onStartCompleted();
 }
@@ -354,17 +410,17 @@
 void CCodec::initiateStop() {
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState == ALLOCATED
-                || state->mState  == RELEASED
-                || state->mState == STOPPING
-                || state->mState == RELEASING) {
+        if (state->get() == ALLOCATED
+                || state->get()  == RELEASED
+                || state->get() == STOPPING
+                || state->get() == RELEASING) {
             // We're already stopped, released, or doing it right now.
             state.unlock();
             mCallback->onStopCompleted();
             state.lock();
             return;
         }
-        state->mState = STOPPING;
+        state->set(STOPPING);
     }
 
     (new AMessage(kWhatStop, this))->post();
@@ -374,19 +430,19 @@
     std::shared_ptr<C2Component> comp;
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState == RELEASING) {
+        if (state->get() == RELEASING) {
             state.unlock();
             // We're already stopped or release is in progress.
             mCallback->onStopCompleted();
             state.lock();
             return;
-        } else if (state->mState != STOPPING) {
+        } else if (state->get() != STOPPING) {
             state.unlock();
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             state.lock();
             return;
         }
-        comp = state->mComp;
+        comp = state->comp;
     }
     mChannel->stop();
     status_t err = comp->stop();
@@ -397,8 +453,8 @@
 
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState == STOPPING) {
-            state->mState = ALLOCATED;
+        if (state->get() == STOPPING) {
+            state->set(ALLOCATED);
         }
     }
     mCallback->onStopCompleted();
@@ -407,7 +463,7 @@
 void CCodec::initiateRelease(bool sendCallback /* = true */) {
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState == RELEASED || state->mState == RELEASING) {
+        if (state->get() == RELEASED || state->get() == RELEASING) {
             // We're already released or doing it right now.
             if (sendCallback) {
                 state.unlock();
@@ -416,8 +472,8 @@
             }
             return;
         }
-        if (state->mState == ALLOCATING) {
-            state->mState = RELEASING;
+        if (state->get() == ALLOCATING) {
+            state->set(RELEASING);
             // With the altered state allocate() would fail and clean up.
             if (sendCallback) {
                 state.unlock();
@@ -426,7 +482,7 @@
             }
             return;
         }
-        state->mState = RELEASING;
+        state->set(RELEASING);
     }
 
     std::thread([this, sendCallback] { release(sendCallback); }).detach();
@@ -436,7 +492,7 @@
     std::shared_ptr<C2Component> comp;
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState == RELEASED) {
+        if (state->get() == RELEASED) {
             if (sendCallback) {
                 state.unlock();
                 mCallback->onReleaseCompleted();
@@ -444,15 +500,15 @@
             }
             return;
         }
-        comp = state->mComp;
+        comp = state->comp;
     }
     mChannel->stop();
     comp->release();
 
     {
         Mutexed<State>::Locked state(mState);
-        state->mState = RELEASED;
-        state->mComp.reset();
+        state->set(RELEASED);
+        state->comp.reset();
     }
     if (sendCallback) {
         mCallback->onReleaseCompleted();
@@ -466,11 +522,11 @@
 void CCodec::signalFlush() {
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != RUNNING) {
+        if (state->get() != RUNNING) {
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             return;
         }
-        state->mState = FLUSHING;
+        state->set(FLUSHING);
     }
 
     (new AMessage(kWhatFlush, this))->post();
@@ -480,13 +536,13 @@
     std::shared_ptr<C2Component> comp;
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != FLUSHING) {
+        if (state->get() != FLUSHING) {
             state.unlock();
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             state.lock();
             return;
         }
-        comp = state->mComp;
+        comp = state->comp;
     }
 
     mChannel->stop();
@@ -502,7 +558,7 @@
 
     {
         Mutexed<State>::Locked state(mState);
-        state->mState = FLUSHED;
+        state->set(FLUSHED);
     }
     mCallback->onFlushCompleted();
 }
@@ -510,26 +566,26 @@
 void CCodec::signalResume() {
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != FLUSHED) {
+        if (state->get() != FLUSHED) {
             state.unlock();
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             state.lock();
             return;
         }
-        state->mState = RESUMING;
+        state->set(RESUMING);
     }
 
     mChannel->start(nullptr, nullptr);
 
     {
         Mutexed<State>::Locked state(mState);
-        if (state->mState != RESUMING) {
+        if (state->get() != RESUMING) {
             state.unlock();
             mCallback->onError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
             state.lock();
             return;
         }
-        state->mState = RUNNING;
+        state->set(RUNNING);
     }
 }
 
@@ -545,6 +601,14 @@
     // TODO
 }
 
+void CCodec::onWorkDone(std::vector<std::unique_ptr<C2Work>> &workItems) {
+    Mutexed<std::list<std::unique_ptr<C2Work>>>::Locked queue(mWorkDoneQueue);
+    for (std::unique_ptr<C2Work> &item : workItems) {
+        queue->push_back(std::move(item));
+    }
+    (new AMessage(kWhatWorkDone, this))->post();
+}
+
 void CCodec::onMessageReceived(const sp<AMessage> &msg) {
     TimePoint now = std::chrono::steady_clock::now();
     switch (msg->what()) {
@@ -582,6 +646,37 @@
             flush();
             break;
         }
+        case kWhatCreateInputSurface: {
+            // Surface operations may be briefly blocking.
+            setDeadline(now + 100ms);
+            createInputSurface();
+            break;
+        }
+        case kWhatSetInputSurface: {
+            // Surface operations may be briefly blocking.
+            setDeadline(now + 100ms);
+            sp<RefBase> obj;
+            CHECK(msg->findObject("surface", &obj));
+            sp<PersistentSurface> surface(static_cast<PersistentSurface *>(obj.get()));
+            setInputSurface(surface);
+            break;
+        }
+        case kWhatWorkDone: {
+            std::unique_ptr<C2Work> work;
+            {
+                Mutexed<std::list<std::unique_ptr<C2Work>>>::Locked queue(mWorkDoneQueue);
+                if (queue->empty()) {
+                    break;
+                }
+                work.swap(queue->front());
+                queue->pop_front();
+                if (!queue->empty()) {
+                    (new AMessage(kWhatWorkDone, this))->post();
+                }
+            }
+            mChannel->onWorkDone(work);
+            break;
+        }
         default: {
             ALOGE("unrecognized message");
             break;
diff --git a/media/libstagefright/CCodecBufferChannel.cpp b/media/libstagefright/CCodecBufferChannel.cpp
index ebc9b0a..2f4a7ea 100644
--- a/media/libstagefright/CCodecBufferChannel.cpp
+++ b/media/libstagefright/CCodecBufferChannel.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#define LOG_NDEBUG 0
+//#define LOG_NDEBUG 0
 #define LOG_TAG "CCodecBufferChannel"
 #include <utils/Log.h>
 
@@ -48,10 +48,189 @@
 using namespace hardware::cas::V1_0;
 using namespace hardware::cas::native::V1_0;
 
+/**
+ * Base class for representation of buffers at one port.
+ */
+class CCodecBufferChannel::Buffers {
+public:
+    Buffers() = default;
+    virtual ~Buffers() = default;
+
+    /**
+     * Set format for MediaCodec-facing buffers.
+     */
+    void setFormat(const sp<AMessage> &format) { mFormat = format; }
+
+    /**
+     * Returns true if the buffers are operating under array mode.
+     */
+    virtual bool isArrayMode() const { return false; }
+
+    /**
+     * Fills the vector with MediaCodecBuffer's if in array mode; otherwise,
+     * no-op.
+     */
+    virtual void getArray(Vector<sp<MediaCodecBuffer>> *) const {}
+
+protected:
+    // Format to be used for creating MediaCodec-facing buffers.
+    sp<AMessage> mFormat;
+
+private:
+    DISALLOW_EVIL_CONSTRUCTORS(Buffers);
+};
+
+class CCodecBufferChannel::InputBuffers : public CCodecBufferChannel::Buffers {
+public:
+    InputBuffers() = default;
+    virtual ~InputBuffers() = default;
+
+    /**
+     * Set a block pool to obtain input memory blocks.
+     */
+    void setPool(const std::shared_ptr<C2BlockPool> &pool) { mPool = pool; }
+
+    /**
+     * Get a new MediaCodecBuffer for input and its corresponding index.
+     * Returns false if no new buffer can be obtained at the moment.
+     */
+    virtual bool requestNewBuffer(size_t *index, sp<MediaCodecBuffer> *buffer) = 0;
+
+    /**
+     * Release the buffer obtained from requestNewBuffer() and get the
+     * associated C2Buffer object back. Returns empty shared_ptr if the
+     * buffer is not on file.
+     *
+     * XXX: this is a quick hack to be removed
+     */
+    virtual std::shared_ptr<C2Buffer> releaseBufferIndex(size_t /* index */) { return nullptr; }
+
+    /**
+     * Release the buffer obtained from requestNewBuffer() and get the
+     * associated C2Buffer object back. Returns empty shared_ptr if the
+     * buffer is not on file.
+     */
+    virtual std::shared_ptr<C2Buffer> releaseBuffer(const sp<MediaCodecBuffer> &buffer) = 0;
+
+    /**
+     * Flush internal state. After this call, no index or buffer previously
+     * returned from requestNewBuffer() is valid.
+     */
+    virtual void flush() = 0;
+
+    /**
+     * Return array-backed version of input buffers. The returned object
+     * shall retain the internal state so that it will honor index and
+     * buffer from previous calls of requestNewBuffer().
+     */
+    virtual std::unique_ptr<InputBuffers> toArrayMode() = 0;
+
+protected:
+    // Pool to obtain blocks for input buffers.
+    std::shared_ptr<C2BlockPool> mPool;
+
+private:
+    DISALLOW_EVIL_CONSTRUCTORS(InputBuffers);
+};
+
+class CCodecBufferChannel::InputBufferClient {
+public:
+    explicit InputBufferClient(
+            const std::shared_ptr<CCodecBufferChannel> &channel) : mChannel(channel) {}
+    virtual ~InputBufferClient() = default;
+
+    virtual void onInputBufferAdded(size_t index, const sp<MediaCodecBuffer> &buffer) {
+        std::shared_ptr<CCodecBufferChannel> channel = mChannel.lock();
+        if (!channel) {
+            return;
+        }
+        channel->mCallback->onInputBufferAvailable(index, buffer);
+    }
+
+    virtual void onStart() {
+        // no-op
+    }
+
+    virtual void onStop() {
+        // no-op
+    }
+
+    virtual void onRelease() {
+        // no-op
+    }
+
+    virtual void onInputBufferAvailable(size_t index, const sp<MediaCodecBuffer> &buffer) {
+        std::shared_ptr<CCodecBufferChannel> channel = mChannel.lock();
+        if (!channel) {
+            return;
+        }
+        channel->mCallback->onInputBufferAvailable(index, buffer);
+    }
+
+protected:
+    InputBufferClient() = default;
+    std::weak_ptr<CCodecBufferChannel> mChannel;
+
+    DISALLOW_EVIL_CONSTRUCTORS(InputBufferClient);
+};
+
+class CCodecBufferChannel::OutputBuffers : public CCodecBufferChannel::Buffers {
+public:
+    OutputBuffers() = default;
+    virtual ~OutputBuffers() = default;
+
+    /**
+     * Register output C2Buffer from the component and obtain corresponding
+     * index and MediaCodecBuffer object. Returns false if registration
+     * fails.
+     */
+    virtual bool registerBuffer(
+            const std::shared_ptr<C2Buffer> &buffer,
+            size_t *index,
+            sp<MediaCodecBuffer> *codecBuffer) = 0;
+
+    /**
+     * Register codec specific data as a buffer to be consistent with
+     * MediaCodec behavior.
+     */
+    virtual bool registerCsd(
+            const C2StreamCsdInfo::output * /* csd */,
+            size_t * /* index */,
+            sp<MediaCodecBuffer> * /* codecBuffer */) {
+        return false;
+    }
+
+    /**
+     * Release the buffer obtained from registerBuffer() and get the
+     * associated C2Buffer object back. Returns empty shared_ptr if the
+     * buffer is not on file.
+     */
+    virtual std::shared_ptr<C2Buffer> releaseBuffer(const sp<MediaCodecBuffer> &buffer) = 0;
+
+    /**
+     * Flush internal state. After this call, no index or buffer previously
+     * returned from registerBuffer() is valid.
+     */
+    virtual void flush(const std::list<std::unique_ptr<C2Work>> &flushedWork) = 0;
+
+    /**
+     * Return array-backed version of output buffers. The returned object
+     * shall retain the internal state so that it will honor index and
+     * buffer from previous calls of registerBuffer().
+     */
+    virtual std::unique_ptr<OutputBuffers> toArrayMode() = 0;
+
+private:
+    DISALLOW_EVIL_CONSTRUCTORS(OutputBuffers);
+};
+
 namespace {
 
+constexpr int32_t kMaskI32 = ~0;
+
 // TODO: get this info from component
 const static size_t kMinBufferArraySize = 16;
+const static size_t kLinearBufferSize = 524288;
 
 template <class T>
 ssize_t findBufferSlot(
@@ -88,9 +267,14 @@
     return Codec2Buffer::allocate(format, block);
 }
 
-class LinearBuffer : public C2Buffer {
+class Buffer1D : public C2Buffer {
 public:
-    explicit LinearBuffer(C2ConstLinearBlock block) : C2Buffer({ block }) {}
+    explicit Buffer1D(C2ConstLinearBlock block) : C2Buffer({ block }) {}
+};
+
+class Buffer2D : public C2Buffer {
+public:
+    explicit Buffer2D(C2ConstGraphicBlock block) : C2Buffer({ block }) {}
 };
 
 class InputBuffersArray : public CCodecBufferChannel::InputBuffers {
@@ -99,36 +283,36 @@
 
     void add(
             size_t index,
-            const sp<MediaCodecBuffer> &clientBuffer,
-            const std::shared_ptr<C2Buffer> &compBuffer,
+            const sp<Codec2Buffer> &clientBuffer,
             bool available) {
-        if (mBufferArray.size() < index) {
+        if (mBufferArray.size() <= index) {
+            // TODO: make this more efficient
             mBufferArray.resize(index + 1);
         }
         mBufferArray[index].clientBuffer = clientBuffer;
-        mBufferArray[index].compBuffer = compBuffer;
         mBufferArray[index].available = available;
     }
 
-    bool isArrayMode() final { return true; }
+    bool isArrayMode() const final { return true; }
 
     std::unique_ptr<CCodecBufferChannel::InputBuffers> toArrayMode() final {
         return nullptr;
     }
 
-    void getArray(Vector<sp<MediaCodecBuffer>> *array) final {
+    void getArray(Vector<sp<MediaCodecBuffer>> *array) const final {
         array->clear();
-        for (const auto &entry : mBufferArray) {
+        for (const Entry &entry : mBufferArray) {
             array->push(entry.clientBuffer);
         }
     }
 
     bool requestNewBuffer(size_t *index, sp<MediaCodecBuffer> *buffer) override {
         for (size_t i = 0; i < mBufferArray.size(); ++i) {
-            if (mBufferArray[i].available) {
+            if (mBufferArray[i].available && mBufferArray[i].compBuffer.expired()) {
                 mBufferArray[i].available = false;
                 *index = i;
                 *buffer = mBufferArray[i].clientBuffer;
+                (*buffer)->setRange(0, (*buffer)->capacity());
                 return true;
             }
         }
@@ -138,8 +322,10 @@
     std::shared_ptr<C2Buffer> releaseBuffer(const sp<MediaCodecBuffer> &buffer) override {
         for (size_t i = 0; i < mBufferArray.size(); ++i) {
             if (!mBufferArray[i].available && mBufferArray[i].clientBuffer == buffer) {
+                std::shared_ptr<C2Buffer> buffer = std::make_shared<Buffer1D>(mBufferArray[i].clientBuffer->share());
                 mBufferArray[i].available = true;
-                return std::move(mBufferArray[i].compBuffer);
+                mBufferArray[i].compBuffer = buffer;
+                return buffer;
             }
         }
         return nullptr;
@@ -148,14 +334,13 @@
     void flush() override {
         for (size_t i = 0; i < mBufferArray.size(); ++i) {
             mBufferArray[i].available = true;
-            mBufferArray[i].compBuffer.reset();
         }
     }
 
 private:
     struct Entry {
-        sp<MediaCodecBuffer> clientBuffer;
-        std::shared_ptr<C2Buffer> compBuffer;
+        sp<Codec2Buffer> clientBuffer;
+        std::weak_ptr<C2Buffer> compBuffer;
         bool available;
     };
 
@@ -177,7 +362,7 @@
         // TODO: proper max input size and usage
         // TODO: read usage from intf
         C2MemoryUsage usage = { C2MemoryUsage::CPU_READ, C2MemoryUsage::CPU_WRITE };
-        sp<Codec2Buffer> newBuffer = allocateLinearBuffer(mPool, mFormat, 65536, usage);
+        sp<Codec2Buffer> newBuffer = allocateLinearBuffer(mPool, mFormat, kLinearBufferSize, usage);
         if (newBuffer == nullptr) {
             return false;
         }
@@ -195,7 +380,7 @@
         sp<Codec2Buffer> codecBuffer = it->promote();
         // We got sp<> reference from the caller so this should never happen..
         CHECK(codecBuffer != nullptr);
-        return std::make_shared<LinearBuffer>(codecBuffer->share());
+        return std::make_shared<Buffer1D>(codecBuffer->share());
     }
 
     void flush() override {
@@ -203,8 +388,10 @@
 
     std::unique_ptr<CCodecBufferChannel::InputBuffers> toArrayMode() final {
         std::unique_ptr<InputBuffersArray> array(new InputBuffersArray);
+        array->setFormat(mFormat);
         // TODO
         const size_t size = std::max(kMinBufferArraySize, mBuffers.size());
+        mBuffers.resize(size);
         for (size_t i = 0; i < size; ++i) {
             sp<Codec2Buffer> clientBuffer = mBuffers[i].promote();
             bool available = false;
@@ -212,13 +399,12 @@
                 // TODO: proper max input size
                 // TODO: read usage from intf
                 C2MemoryUsage usage = { C2MemoryUsage::CPU_READ, C2MemoryUsage::CPU_WRITE };
-                clientBuffer = allocateLinearBuffer(mPool, mFormat, 65536, usage);
+                clientBuffer = allocateLinearBuffer(mPool, mFormat, kLinearBufferSize, usage);
                 available = true;
             }
             array->add(
                     i,
                     clientBuffer,
-                    std::make_shared<LinearBuffer>(clientBuffer->share()),
                     available);
         }
         return std::move(array);
@@ -230,19 +416,30 @@
     std::vector<wp<Codec2Buffer>> mBuffers;
 };
 
-// TODO: stub
 class GraphicInputBuffers : public CCodecBufferChannel::InputBuffers {
 public:
-    using CCodecBufferChannel::InputBuffers::InputBuffers;
+    GraphicInputBuffers() = default;
 
     bool requestNewBuffer(size_t *index, sp<MediaCodecBuffer> *buffer) override {
-        (void)index;
-        (void)buffer;
-        return false;
+        *buffer = nullptr;
+        for (size_t i = 0; i < mAvailable.size(); ++i) {
+            if (mAvailable[i]) {
+                *index = i;
+                mAvailable[i] = false;
+                return true;
+            }
+        }
+        *index = mAvailable.size();
+        mAvailable.push_back(false);
+        return true;
     }
 
-    std::shared_ptr<C2Buffer> releaseBuffer(const sp<MediaCodecBuffer> &buffer) override {
-        (void)buffer;
+    std::shared_ptr<C2Buffer> releaseBufferIndex(size_t index) override {
+        mAvailable[index] = true;
+        return nullptr;
+    }
+
+    std::shared_ptr<C2Buffer> releaseBuffer(const sp<MediaCodecBuffer> &) override {
         return nullptr;
     }
 
@@ -252,6 +449,9 @@
     std::unique_ptr<CCodecBufferChannel::InputBuffers> toArrayMode() final {
         return nullptr;
     }
+
+private:
+    std::vector<bool> mAvailable;
 };
 
 class OutputBuffersArray : public CCodecBufferChannel::OutputBuffers {
@@ -263,7 +463,8 @@
             const sp<MediaCodecBuffer> &clientBuffer,
             const std::shared_ptr<C2Buffer> &compBuffer,
             bool available) {
-        if (mBufferArray.size() < index) {
+        if (mBufferArray.size() <= index) {
+            // TODO: make this more efficient
             mBufferArray.resize(index + 1);
         }
         mBufferArray[index].clientBuffer = clientBuffer;
@@ -271,7 +472,7 @@
         mBufferArray[index].available = available;
     }
 
-    bool isArrayMode() final { return true; }
+    bool isArrayMode() const final { return true; }
 
     std::unique_ptr<CCodecBufferChannel::OutputBuffers> toArrayMode() final {
         return nullptr;
@@ -285,6 +486,7 @@
             if (mBufferArray[i].available && copy(buffer, mBufferArray[i].clientBuffer)) {
                 *index = i;
                 *codecBuffer = mBufferArray[i].clientBuffer;
+                (*codecBuffer)->setFormat(mFormat);
                 mBufferArray[i].compBuffer = buffer;
                 mBufferArray[i].available = false;
                 return true;
@@ -299,10 +501,17 @@
             sp<MediaCodecBuffer> *codecBuffer) final {
         for (size_t i = 0; i < mBufferArray.size(); ++i) {
             if (mBufferArray[i].available
-                    && mBufferArray[i].clientBuffer->capacity() <= csd->flexCount()) {
+                    && mBufferArray[i].clientBuffer->capacity() >= csd->flexCount()) {
+                // TODO: proper format update
+                sp<ABuffer> csdBuffer = ABuffer::CreateAsCopy(csd->m.value, csd->flexCount());
+                mFormat = mFormat->dup();
+                mFormat->setBuffer("csd-0", csdBuffer);
+
                 memcpy(mBufferArray[i].clientBuffer->base(), csd->m.value, csd->flexCount());
+                mBufferArray[i].clientBuffer->setRange(0, csd->flexCount());
                 *index = i;
                 *codecBuffer = mBufferArray[i].clientBuffer;
+                (*codecBuffer)->setFormat(mFormat);
                 mBufferArray[i].available = false;
                 return true;
             }
@@ -333,9 +542,9 @@
             const std::shared_ptr<C2Buffer> &buffer,
             const sp<MediaCodecBuffer> &clientBuffer) = 0;
 
-    void getArray(Vector<sp<MediaCodecBuffer>> *array) final {
+    void getArray(Vector<sp<MediaCodecBuffer>> *array) const final {
         array->clear();
-        for (const auto &entry : mBufferArray) {
+        for (const Entry &entry : mBufferArray) {
             array->push(entry.clientBuffer);
         }
     }
@@ -363,6 +572,7 @@
         }
         C2ReadView view = buffer->data().linearBlocks().front().map().get();
         if (clientBuffer->capacity() < view.capacity()) {
+            ALOGV("view.capacity() = %u", view.capacity());
             return false;
         }
         clientBuffer->setRange(0u, view.capacity());
@@ -425,9 +635,11 @@
         if (ret < 0) {
             return false;
         }
-        sp<MediaCodecBuffer> newBuffer = new MediaCodecBuffer(
-                mFormat,
-                ABuffer::CreateAsCopy(csd->m.value, csd->flexCount()));
+        // TODO: proper format update
+        sp<ABuffer> csdBuffer = ABuffer::CreateAsCopy(csd->m.value, csd->flexCount());
+        mFormat = mFormat->dup();
+        mFormat->setBuffer("csd-0", csdBuffer);
+        sp<MediaCodecBuffer> newBuffer = new MediaCodecBuffer(mFormat, csdBuffer);
         mBuffers[ret] = { newBuffer, nullptr };
         *index = ret;
         *codecBuffer = newBuffer;
@@ -498,15 +710,17 @@
 
     std::unique_ptr<CCodecBufferChannel::OutputBuffers> toArrayMode() override {
         std::unique_ptr<OutputBuffersArray> array(new LinearOutputBuffersArray);
+        array->setFormat(mFormat);
 
         const size_t size = std::max(kMinBufferArraySize, mBuffers.size());
+        mBuffers.resize(size);
         for (size_t i = 0; i < size; ++i) {
             sp<MediaCodecBuffer> clientBuffer = mBuffers[i].clientBuffer.promote();
             std::shared_ptr<C2Buffer> compBuffer = mBuffers[i].bufferRef;
             bool available = false;
             if (clientBuffer == nullptr) {
                 // TODO: proper max input size
-                clientBuffer = new MediaCodecBuffer(mFormat, new ABuffer(65536));
+                clientBuffer = new MediaCodecBuffer(mFormat, new ABuffer(kLinearBufferSize));
                 available = true;
                 compBuffer.reset();
             }
@@ -526,8 +740,10 @@
 
     std::unique_ptr<CCodecBufferChannel::OutputBuffers> toArrayMode() override {
         std::unique_ptr<OutputBuffersArray> array(new GraphicOutputBuffersArray);
+        array->setFormat(mFormat);
 
         const size_t size = std::max(kMinBufferArraySize, mBuffers.size());
+        mBuffers.resize(size);
         for (size_t i = 0; i < size; ++i) {
             sp<MediaCodecBuffer> clientBuffer = mBuffers[i].clientBuffer.promote();
             std::shared_ptr<C2Buffer> compBuffer = mBuffers[i].bufferRef;
@@ -543,8 +759,163 @@
     }
 };
 
+class BufferQueueClient : public CCodecBufferChannel::InputBufferClient {
+public:
+    explicit BufferQueueClient(const sp<GraphicBufferSource> &source) : mSource(source) {}
+    virtual ~BufferQueueClient() = default;
+
+    void onInputBufferAdded(size_t index, const sp<MediaCodecBuffer> &buffer) override {
+        (void)buffer;
+        mSource->onInputBufferAdded(index & kMaskI32);
+    }
+
+    void onStart() override {
+        mSource->start();
+    }
+
+    void onStop() override {
+        mSource->stop();
+    }
+
+    void onRelease() override {
+        mSource->release();
+    }
+
+    void onInputBufferAvailable(size_t index, const sp<MediaCodecBuffer> &buffer) override {
+        ALOGV("onInputBufferEmptied index = %zu", index);
+        (void)buffer;
+        // TODO: can we really ignore fence here?
+        mSource->onInputBufferEmptied(index & kMaskI32, -1 /* fenceFd */);
+    }
+
+private:
+    sp<GraphicBufferSource> mSource;
+};
+
+class GraphicBlock : public C2GraphicBlock {
+    using C2GraphicBlock::C2GraphicBlock;
+    friend class ::android::CCodecBufferChannel;
+};
+
 }  // namespace
 
+class CCodecBufferChannel::C2ComponentWrapper : public ComponentWrapper {
+public:
+    explicit C2ComponentWrapper(
+            const std::shared_ptr<CCodecBufferChannel> &channel)
+        : mChannel(channel), mLastTimestamp(0) {}
+
+    virtual ~C2ComponentWrapper() {
+        for (const std::pair<int32_t, C2Handle *> &entry : mHandles) {
+            native_handle_delete(entry.second);
+        }
+    }
+
+    status_t submitBuffer(
+            int32_t bufferId, const sp<GraphicBuffer> &buffer,
+            int64_t timestamp, int fenceFd) override {
+        ALOGV("submitBuffer bufferId = %d", bufferId);
+        // TODO: Use fd to construct fence
+        (void)fenceFd;
+
+        std::shared_ptr<CCodecBufferChannel> channel = mChannel.lock();
+        if (!channel) {
+            return NO_INIT;
+        }
+
+        std::shared_ptr<C2Allocator> allocator = mAllocator.lock();
+        if (!allocator) {
+            c2_status_t err = GetCodec2PlatformAllocatorStore()->fetchAllocator(
+                    C2AllocatorStore::PLATFORM_START + 1,  // GRALLOC
+                    &allocator);
+            if (err != OK) {
+                return UNKNOWN_ERROR;
+            }
+            mAllocator = allocator;
+        }
+
+        std::shared_ptr<C2GraphicAllocation> alloc;
+        C2Handle *handle = WrapNativeCodec2GrallocHandle(
+                buffer->handle, buffer->width, buffer->height,
+                buffer->format, buffer->usage, buffer->stride);
+        c2_status_t err = allocator->priorGraphicAllocation(handle, &alloc);
+        if (err != OK) {
+            return UNKNOWN_ERROR;
+        }
+        std::shared_ptr<C2GraphicBlock> block(new GraphicBlock(alloc));
+
+        std::unique_ptr<C2Work> work(new C2Work);
+        work->input.flags = (C2FrameData::flags_t)0;
+        work->input.ordinal.timestamp = timestamp;
+        work->input.ordinal.frameIndex = channel->mFrameIndex++;
+        work->input.buffers.clear();
+        work->input.buffers.emplace_back(new Buffer2D(
+                // TODO: fence
+                block->share(C2Rect(block->width(), block->height()), ::android::C2Fence())));
+        work->worklets.clear();
+        work->worklets.emplace_back(new C2Worklet);
+        std::list<std::unique_ptr<C2Work>> items;
+        items.push_back(std::move(work));
+
+        err = channel->mComponent->queue_nb(&items);
+        if (err != OK) {
+            native_handle_delete(handle);
+            return UNKNOWN_ERROR;
+        }
+
+        mLastTimestamp = timestamp;
+        if (mHandles.count(bufferId) > 0) {
+            native_handle_delete(mHandles[bufferId]);
+        }
+        mHandles[bufferId] = handle;
+
+        Mutexed<std::unique_ptr<InputBuffers>>::Locked buffers(channel->mInputBuffers);
+        ALOGV("releaseBufferIndex index = %d", bufferId);
+        (*buffers)->releaseBufferIndex(bufferId);
+
+        return OK;
+    }
+
+    status_t submitEos(int32_t bufferId) override {
+        std::shared_ptr<CCodecBufferChannel> channel = mChannel.lock();
+        if (!channel) {
+            return NO_INIT;
+        }
+
+        std::unique_ptr<C2Work> work(new C2Work);
+        work->input.flags = C2FrameData::FLAG_END_OF_STREAM;
+        work->input.ordinal.timestamp = mLastTimestamp;
+        work->input.ordinal.frameIndex = channel->mFrameIndex++;
+        work->input.buffers.clear();
+        work->input.buffers.push_back(nullptr);
+        work->worklets.clear();
+        work->worklets.emplace_back(new C2Worklet);
+        std::list<std::unique_ptr<C2Work>> items;
+        items.push_back(std::move(work));
+
+        c2_status_t err = channel->mComponent->queue_nb(&items);
+
+        Mutexed<std::unique_ptr<InputBuffers>>::Locked buffers(channel->mInputBuffers);
+        (*buffers)->releaseBufferIndex(bufferId);
+
+        return (err == C2_OK) ? OK : UNKNOWN_ERROR;
+    }
+
+    void dispatchDataSpaceChanged(
+            int32_t dataSpace, int32_t aspects, int32_t pixelFormat) override {
+        // TODO
+        (void)dataSpace;
+        (void)aspects;
+        (void)pixelFormat;
+    }
+
+private:
+    std::weak_ptr<CCodecBufferChannel> mChannel;
+    std::map<int32_t, C2Handle *> mHandles;
+    int64_t mLastTimestamp;
+    std::weak_ptr<C2Allocator> mAllocator;
+};
+
 CCodecBufferChannel::QueueGuard::QueueGuard(
         CCodecBufferChannel::QueueSync &sync) : mSync(sync) {
     std::unique_lock<std::mutex> l(mSync.mMutex);
@@ -601,10 +972,14 @@
     if (mCrypto != nullptr && mDealer != nullptr && mHeapSeqNum >= 0) {
         mCrypto->unsetHeap(mHeapSeqNum);
     }
+    // TODO: is this the right place?
+    mInputClient->onRelease();
 }
 
 void CCodecBufferChannel::setComponent(const std::shared_ptr<C2Component> &component) {
     mComponent = component;
+    mInputClient.reset(new InputBufferClient(shared_from_this()));
+
     C2StreamFormatConfig::input inputFormat(0u);
     C2StreamFormatConfig::output outputFormat(0u);
     c2_status_t err = mComponent->intf()->query_vb(
@@ -638,6 +1013,10 @@
         } else {
             // TODO: error
         }
+        // TODO: remove once we switch to proper buffer pool.
+        if (!graphic) {
+            *buffers = (*buffers)->toArrayMode();
+        }
     }
 
     {
@@ -652,6 +1031,18 @@
     }
 }
 
+status_t CCodecBufferChannel::setGraphicBufferSource(
+        const sp<GraphicBufferSource> &source) {
+    ALOGV("setGraphicBufferSource");
+    mInputClient.reset(new BufferQueueClient(source));
+
+    // TODO: proper color aspect & dataspace
+    android_dataspace dataSpace = HAL_DATASPACE_BT709;
+    // TODO: read settings properly from the interface
+    return source->configure(new C2ComponentWrapper(
+            shared_from_this()), dataSpace, 16, 1080, 1920, GRALLOC_USAGE_SW_READ_OFTEN);
+}
+
 status_t CCodecBufferChannel::queueInputBuffer(const sp<MediaCodecBuffer> &buffer) {
     QueueGuard guard(mSync);
     if (!guard.isRunning()) {
@@ -708,9 +1099,24 @@
     return -ENOSYS;
 }
 
+void CCodecBufferChannel::feedInputBufferIfAvailable() {
+    sp<MediaCodecBuffer> inBuffer;
+    size_t index;
+    {
+        Mutexed<std::unique_ptr<InputBuffers>>::Locked buffers(mInputBuffers);
+        if (!(*buffers)->requestNewBuffer(&index, &inBuffer)) {
+            ALOGW("no new buffer available");
+            inBuffer = nullptr;
+        }
+    }
+    ALOGV("new input index = %zu", index);
+    mInputClient->onInputBufferAvailable(index, inBuffer);
+}
+
 status_t CCodecBufferChannel::renderOutputBuffer(
         const sp<MediaCodecBuffer> &buffer, int64_t timestampNs) {
     ALOGV("renderOutputBuffer");
+    feedInputBufferIfAvailable();
 
     std::shared_ptr<C2Buffer> c2Buffer;
     {
@@ -780,7 +1186,9 @@
     }
     {
         Mutexed<std::unique_ptr<OutputBuffers>>::Locked buffers(mOutputBuffers);
-        (void)(*buffers)->releaseBuffer(buffer);
+        if((*buffers)->releaseBuffer(buffer)) {
+            feedInputBufferIfAvailable();
+        }
     }
     return OK;
 }
@@ -832,13 +1240,15 @@
                 return;
             }
         }
-        mCallback->onInputBufferAvailable(index, buffer);
+        mInputClient->onInputBufferAdded(index, buffer);
     }
+    mInputClient->onStart();
 }
 
 void CCodecBufferChannel::stop() {
     mSync.stop();
     mFirstValidFrameIndex = mFrameIndex.load();
+    mInputClient->onStop();
 }
 
 void CCodecBufferChannel::flush(const std::list<std::unique_ptr<C2Work>> &flushedWork) {
@@ -852,106 +1262,110 @@
     }
 }
 
-void CCodecBufferChannel::onWorkDone(std::vector<std::unique_ptr<C2Work>> workItems) {
-    for (const auto &work : workItems) {
-        sp<MediaCodecBuffer> inBuffer;
-        size_t index;
-        {
-            Mutexed<std::unique_ptr<InputBuffers>>::Locked buffers(mInputBuffers);
-            if (!(*buffers)->requestNewBuffer(&index, &inBuffer)) {
-                ALOGW("no new buffer available");
-                inBuffer = nullptr;
-            }
-        }
-        if (inBuffer != nullptr) {
-            mCallback->onInputBufferAvailable(index, inBuffer);
-        }
+void CCodecBufferChannel::onWorkDone(const std::unique_ptr<C2Work> &work) {
+    if (work->result != OK) {
+        ALOGE("work failed to complete: %d", work->result);
+        mOnError(work->result, ACTION_CODE_FATAL);
+        return;
+    }
 
-        if (work->result != OK) {
-            ALOGE("work failed to complete: %d", work->result);
-            mOnError(work->result, ACTION_CODE_FATAL);
+    // NOTE: MediaCodec usage supposedly have only one worklet
+    if (work->worklets.size() != 1u) {
+        ALOGE("onWorkDone: incorrect number of worklets: %zu",
+                work->worklets.size());
+        mOnError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
+        return;
+    }
+
+    const std::unique_ptr<C2Worklet> &worklet = work->worklets.front();
+    if ((worklet->output.ordinal.frameIndex - mFirstValidFrameIndex.load()).peek() < 0) {
+        // Discard frames from previous generation.
+        return;
+    }
+    std::shared_ptr<C2Buffer> buffer;
+    // NOTE: MediaCodec usage supposedly have only one output stream.
+    if (worklet->output.buffers.size() > 1u) {
+        ALOGE("onWorkDone: incorrect number of output buffers: %zu",
+                worklet->output.buffers.size());
+        mOnError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
+        return;
+    } else if (worklet->output.buffers.size() == 1u) {
+        buffer = worklet->output.buffers[0];
+        if (!buffer) {
+            ALOGW("onWorkDone: nullptr found in buffers; ignored.");
+        }
+    }
+
+    const C2StreamCsdInfo::output *csdInfo = nullptr;
+    for (const std::unique_ptr<C2Param> &info : worklet->output.configUpdate) {
+        if (info->coreIndex() == C2StreamCsdInfo::output::CORE_INDEX) {
+            ALOGV("onWorkDone: csd found");
+            csdInfo = static_cast<const C2StreamCsdInfo::output *>(info.get());
+        }
+    }
+
+    int32_t flags = 0;
+    if (worklet->output.flags & C2FrameData::FLAG_END_OF_STREAM) {
+        flags |= MediaCodec::BUFFER_FLAG_EOS;
+        ALOGV("onWorkDone: output EOS");
+    }
+
+    sp<MediaCodecBuffer> outBuffer;
+    size_t index;
+    if (csdInfo != nullptr) {
+        Mutexed<std::unique_ptr<OutputBuffers>>::Locked buffers(mOutputBuffers);
+        if ((*buffers)->registerCsd(csdInfo, &index, &outBuffer)) {
+            outBuffer->meta()->setInt64("timeUs", worklet->output.ordinal.timestamp.peek());
+            outBuffer->meta()->setInt32("flags", flags | MediaCodec::BUFFER_FLAG_CODECCONFIG);
+            ALOGV("onWorkDone: csd index = %zu", index);
+
+            buffers.unlock();
+            mCallback->onOutputBufferAvailable(index, outBuffer);
+            buffers.lock();
+        } else {
+            ALOGE("onWorkDone: unable to register csd");
+            buffers.unlock();
+            mOnError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
+            buffers.lock();
             return;
         }
-
-        // NOTE: MediaCodec usage supposedly have only one worklet
-        if (work->worklets.size() != 1u) {
-            ALOGE("incorrect number of worklets: %zu", work->worklets.size());
-            mOnError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
-            continue;
-        }
-
-        const std::unique_ptr<C2Worklet> &worklet = work->worklets.front();
-        if ((worklet->output.ordinal.frameIndex - mFirstValidFrameIndex.load()).peek() < 0) {
-            // Discard frames from previous generation.
-            continue;
-        }
-        // NOTE: MediaCodec usage supposedly have only one output stream.
-        if (worklet->output.buffers.size() != 1u) {
-            ALOGE("incorrect number of output buffers: %zu", worklet->output.buffers.size());
-            mOnError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
-            continue;
-        }
-
-        const std::shared_ptr<C2Buffer> &buffer = worklet->output.buffers[0];
-        const C2StreamCsdInfo::output *csdInfo = nullptr;
-        if (buffer) {
-            // TODO: transfer infos() into buffer metadata
-        }
-        for (const auto &info : worklet->output.configUpdate) {
-            if (info->coreIndex() == C2StreamCsdInfo::output::CORE_INDEX) {
-                ALOGV("csd found");
-                csdInfo = static_cast<const C2StreamCsdInfo::output *>(info.get());
-            }
-        }
-
-        int32_t flags = 0;
-        if (worklet->output.flags & C2FrameData::FLAG_END_OF_STREAM) {
-            flags |= MediaCodec::BUFFER_FLAG_EOS;
-            ALOGV("output EOS");
-        }
-
-        sp<MediaCodecBuffer> outBuffer;
-        if (csdInfo != nullptr) {
-            Mutexed<std::unique_ptr<OutputBuffers>>::Locked buffers(mOutputBuffers);
-            if ((*buffers)->registerCsd(csdInfo, &index, &outBuffer)) {
-                outBuffer->meta()->setInt64("timeUs", worklet->output.ordinal.timestamp.peek());
-                outBuffer->meta()->setInt32("flags", flags | MediaCodec::BUFFER_FLAG_CODECCONFIG);
-                ALOGV("csd index = %zu", index);
-
-                buffers.unlock();
-                mCallback->onOutputBufferAvailable(index, outBuffer);
-                buffers.lock();
-            } else {
-                ALOGE("unable to register output buffer");
-                buffers.unlock();
-                mOnError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
-                buffers.lock();
-                continue;
-            }
-        }
-
-        if (!buffer && !flags) {
-            ALOGV("Not reporting output buffer");
-            continue;
-        }
-
-        {
-            Mutexed<std::unique_ptr<OutputBuffers>>::Locked buffers(mOutputBuffers);
-            if (!(*buffers)->registerBuffer(buffer, &index, &outBuffer)) {
-                ALOGE("unable to register output buffer");
-
-                buffers.unlock();
-                mOnError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
-                buffers.lock();
-                continue;
-            }
-        }
-
-        outBuffer->meta()->setInt64("timeUs", worklet->output.ordinal.timestamp.peek());
-        outBuffer->meta()->setInt32("flags", flags);
-        ALOGV("index = %zu", index);
-        mCallback->onOutputBufferAvailable(index, outBuffer);
     }
+
+    if (!buffer && !flags) {
+        ALOGV("onWorkDone: Not reporting output buffer");
+        return;
+    }
+
+    if (buffer) {
+        for (const std::shared_ptr<const C2Info> &info : buffer->info()) {
+            // TODO: properly translate these to metadata
+            switch (info->coreIndex().coreIndex()) {
+                case C2StreamPictureTypeMaskInfo::CORE_INDEX:
+                    if (((C2StreamPictureTypeMaskInfo *)info.get())->value & C2PictureTypeKeyFrame) {
+                        flags |= MediaCodec::BUFFER_FLAG_SYNCFRAME;
+                    }
+                    break;
+                default:
+                    break;
+            }
+        }
+    }
+
+    {
+        Mutexed<std::unique_ptr<OutputBuffers>>::Locked buffers(mOutputBuffers);
+        if (!(*buffers)->registerBuffer(buffer, &index, &outBuffer)) {
+            ALOGE("onWorkDone: unable to register output buffer");
+            buffers.unlock();
+            mOnError(UNKNOWN_ERROR, ACTION_CODE_FATAL);
+            buffers.lock();
+            return;
+        }
+    }
+
+    outBuffer->meta()->setInt64("timeUs", worklet->output.ordinal.timestamp.peek());
+    outBuffer->meta()->setInt32("flags", flags);
+    ALOGV("onWorkDone: out buffer index = %zu", index);
+    mCallback->onOutputBufferAvailable(index, outBuffer);
 }
 
 status_t CCodecBufferChannel::setSurface(const sp<Surface> &newSurface) {
diff --git a/media/libstagefright/codec2/include/C2Config.h b/media/libstagefright/codec2/include/C2Config.h
index 83cb72c..2a2b9de 100644
--- a/media/libstagefright/codec2/include/C2Config.h
+++ b/media/libstagefright/codec2/include/C2Config.h
@@ -67,6 +67,7 @@
     kParamIndexVideoSizeTuning,
 
     kParamIndexCsd,
+    kParamIndexPictureTypeMask,
 
     // video info
 
@@ -133,6 +134,12 @@
 
 typedef C2StreamParam<C2Info, C2BlobValue, kParamIndexCsd> C2StreamCsdInfo;
 
+C2ENUM(C2PictureTypeMask, uint32_t,
+    C2PictureTypeKeyFrame = (1u << 0),
+)
+
+typedef C2StreamParam<C2Info, C2Uint32Value, kParamIndexPictureTypeMask> C2StreamPictureTypeMaskInfo;
+
 /*
    Component description fields:
 
diff --git a/media/libstagefright/codec2/vndk/C2AllocatorGralloc.cpp b/media/libstagefright/codec2/vndk/C2AllocatorGralloc.cpp
index 18db3e9..a5ea511 100644
--- a/media/libstagefright/codec2/vndk/C2AllocatorGralloc.cpp
+++ b/media/libstagefright/codec2/vndk/C2AllocatorGralloc.cpp
@@ -38,6 +38,15 @@
 using ::android::hardware::hidl_handle;
 using ::android::hardware::hidl_vec;
 
+namespace {
+
+struct BufferDescriptorInfo {
+    IMapper::BufferDescriptorInfo mapperInfo;
+    uint32_t stride;
+};
+
+}
+
 /* ===================================== GRALLOC ALLOCATION ==================================== */
 static c2_status_t maperr2error(Error maperr) {
     switch (maperr) {
@@ -73,6 +82,7 @@
         uint32_t format;
         uint32_t usage_lo;
         uint32_t usage_hi;
+        uint32_t stride;
         uint32_t magic;
     };
 
@@ -109,13 +119,16 @@
 
     static C2HandleGralloc* WrapNativeHandle(
             const native_handle_t *const handle,
-            uint32_t width, uint32_t height, uint32_t format, uint64_t usage) {
+            uint32_t width, uint32_t height, uint32_t format, uint64_t usage, uint32_t stride) {
         //CHECK(handle != nullptr);
         if (native_handle_is_invalid(handle) ||
             handle->numInts > int((INT_MAX - handle->version) / sizeof(int)) - NUM_INTS - handle->numFds) {
             return nullptr;
         }
-        ExtraData xd = { width, height, format, uint32_t(usage & 0xFFFFFFFF), uint32_t(usage >> 32), MAGIC };
+        ExtraData xd = {
+            width, height, format, uint32_t(usage & 0xFFFFFFFF), uint32_t(usage >> 32),
+            stride, MAGIC
+        };
         native_handle_t *res = native_handle_create(handle->numFds, handle->numInts + NUM_INTS);
         if (res != nullptr) {
             memcpy(&res->data, &handle->data, sizeof(int) * (handle->numFds + handle->numInts));
@@ -138,7 +151,8 @@
 
     static const C2HandleGralloc* Import(
             const C2Handle *const handle,
-            uint32_t *width, uint32_t *height, uint32_t *format, uint64_t *usage) {
+            uint32_t *width, uint32_t *height, uint32_t *format,
+            uint64_t *usage, uint32_t *stride) {
         const ExtraData *xd = getExtraData(handle);
         if (xd == nullptr) {
             return nullptr;
@@ -147,15 +161,22 @@
         *height = xd->height;
         *format = xd->format;
         *usage = xd->usage_lo | (uint64_t(xd->usage_hi) << 32);
+        *stride = xd->stride;
 
         return reinterpret_cast<const C2HandleGralloc *>(handle);
     }
 };
 
-native_handle_t* UnwrapNativeCodec2GrallocHandle(const C2Handle *const handle) {
+native_handle_t *UnwrapNativeCodec2GrallocHandle(const C2Handle *const handle) {
     return C2HandleGralloc::UnwrapNativeHandle(handle);
 }
 
+C2Handle *WrapNativeCodec2GrallocHandle(
+        const native_handle_t *const handle,
+        uint32_t width, uint32_t height, uint32_t format, uint64_t usage, uint32_t stride) {
+    return C2HandleGralloc::WrapNativeHandle(handle, width, height, format, usage, stride);
+}
+
 class C2AllocationGralloc : public C2GraphicAllocation {
 public:
     virtual ~C2AllocationGralloc() override;
@@ -171,7 +192,7 @@
     // internal methods
     // |handle| will be moved.
     C2AllocationGralloc(
-              const IMapper::BufferDescriptorInfo &info,
+              const BufferDescriptorInfo &info,
               const sp<IMapper> &mapper,
               hidl_handle &hidlHandle,
               const C2HandleGralloc *const handle);
@@ -179,7 +200,7 @@
     c2_status_t status() const;
 
 private:
-    const IMapper::BufferDescriptorInfo mInfo;
+    const BufferDescriptorInfo mInfo;
     const sp<IMapper> mMapper;
     const hidl_handle mHidlHandle;
     const C2HandleGralloc *mHandle;
@@ -189,11 +210,11 @@
 };
 
 C2AllocationGralloc::C2AllocationGralloc(
-          const IMapper::BufferDescriptorInfo &info,
+          const BufferDescriptorInfo &info,
           const sp<IMapper> &mapper,
           hidl_handle &hidlHandle,
           const C2HandleGralloc *const handle)
-    : C2GraphicAllocation(info.width, info.height),
+    : C2GraphicAllocation(info.mapperInfo.width, info.mapperInfo.height),
       mInfo(info),
       mMapper(mapper),
       mHidlHandle(std::move(hidlHandle)),
@@ -241,83 +262,133 @@
             return C2_CORRUPTED;
         }
         mLockedHandle = C2HandleGralloc::WrapNativeHandle(
-                mBuffer, mInfo.width, mInfo.height, (uint32_t)mInfo.format, mInfo.usage);
+                mBuffer, mInfo.mapperInfo.width, mInfo.mapperInfo.height,
+                (uint32_t)mInfo.mapperInfo.format, mInfo.mapperInfo.usage, mInfo.stride);
     }
 
-    if (mInfo.format == PixelFormat::YCBCR_420_888 || mInfo.format == PixelFormat::YV12) {
-        YCbCrLayout ycbcrLayout;
-        mMapper->lockYCbCr(
-                const_cast<native_handle_t *>(mBuffer),
-                BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN,
-                { (int32_t)rect.left, (int32_t)rect.top, (int32_t)rect.width, (int32_t)rect.height },
-                // TODO: fence
-                hidl_handle(),
-                [&err, &ycbcrLayout](const auto &maperr, const auto &mapLayout) {
-                    err = maperr2error(maperr);
-                    if (err == C2_OK) {
-                        ycbcrLayout = mapLayout;
-                    }
-                });
-        if (err != C2_OK) {
-            return err;
+    switch (mInfo.mapperInfo.format) {
+        case PixelFormat::YCBCR_420_888:
+        case PixelFormat::YV12: {
+            YCbCrLayout ycbcrLayout;
+            mMapper->lockYCbCr(
+                    const_cast<native_handle_t *>(mBuffer),
+                    BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN,
+                    { (int32_t)rect.left, (int32_t)rect.top, (int32_t)rect.width, (int32_t)rect.height },
+                    // TODO: fence
+                    hidl_handle(),
+                    [&err, &ycbcrLayout](const auto &maperr, const auto &mapLayout) {
+                        err = maperr2error(maperr);
+                        if (err == C2_OK) {
+                            ycbcrLayout = mapLayout;
+                        }
+                    });
+            if (err != C2_OK) {
+                return err;
+            }
+            addr[C2PlanarLayout::PLANE_Y] = (uint8_t *)ycbcrLayout.y;
+            addr[C2PlanarLayout::PLANE_U] = (uint8_t *)ycbcrLayout.cb;
+            addr[C2PlanarLayout::PLANE_V] = (uint8_t *)ycbcrLayout.cr;
+            layout->type = C2PlanarLayout::TYPE_YUV;
+            layout->numPlanes = 3;
+            layout->planes[C2PlanarLayout::PLANE_Y] = {
+                C2PlaneInfo::CHANNEL_Y,         // channel
+                1,                              // colInc
+                (int32_t)ycbcrLayout.yStride,   // rowInc
+                1,                              // mColSampling
+                1,                              // mRowSampling
+                8,                              // allocatedDepth
+                8,                              // bitDepth
+                0,                              // rightShift
+                C2PlaneInfo::NATIVE,            // endianness
+            };
+            layout->planes[C2PlanarLayout::PLANE_U] = {
+                C2PlaneInfo::CHANNEL_CB,          // channel
+                (int32_t)ycbcrLayout.chromaStep,  // colInc
+                (int32_t)ycbcrLayout.cStride,     // rowInc
+                2,                                // mColSampling
+                2,                                // mRowSampling
+                8,                                // allocatedDepth
+                8,                                // bitDepth
+                0,                                // rightShift
+                C2PlaneInfo::NATIVE,              // endianness
+            };
+            layout->planes[C2PlanarLayout::PLANE_V] = {
+                C2PlaneInfo::CHANNEL_CR,          // channel
+                (int32_t)ycbcrLayout.chromaStep,  // colInc
+                (int32_t)ycbcrLayout.cStride,     // rowInc
+                2,                                // mColSampling
+                2,                                // mRowSampling
+                8,                                // allocatedDepth
+                8,                                // bitDepth
+                0,                                // rightShift
+                C2PlaneInfo::NATIVE,              // endianness
+            };
+            break;
         }
-        addr[C2PlanarLayout::PLANE_Y] = (uint8_t *)ycbcrLayout.y;
-        addr[C2PlanarLayout::PLANE_U] = (uint8_t *)ycbcrLayout.cb;
-        addr[C2PlanarLayout::PLANE_V] = (uint8_t *)ycbcrLayout.cr;
-        layout->type = C2PlanarLayout::TYPE_YUV;
-        layout->numPlanes = 3;
-        layout->planes[C2PlanarLayout::PLANE_Y] = {
-            C2PlaneInfo::CHANNEL_Y,         // channel
-            1,                              // colInc
-            (int32_t)ycbcrLayout.yStride,   // rowInc
-            1,                              // mColSampling
-            1,                              // mRowSampling
-            8,                              // allocatedDepth
-            8,                              // bitDepth
-            0,                              // rightShift
-            C2PlaneInfo::NATIVE,            // endianness
-        };
-        layout->planes[C2PlanarLayout::PLANE_U] = {
-            C2PlaneInfo::CHANNEL_CB,          // channel
-            (int32_t)ycbcrLayout.chromaStep,  // colInc
-            (int32_t)ycbcrLayout.cStride,     // rowInc
-            2,                                // mColSampling
-            2,                                // mRowSampling
-            8,                                // allocatedDepth
-            8,                                // bitDepth
-            0,                                // rightShift
-            C2PlaneInfo::NATIVE,              // endianness
-        };
-        layout->planes[C2PlanarLayout::PLANE_V] = {
-            C2PlaneInfo::CHANNEL_CR,          // channel
-            (int32_t)ycbcrLayout.chromaStep,  // colInc
-            (int32_t)ycbcrLayout.cStride,     // rowInc
-            2,                                // mColSampling
-            2,                                // mRowSampling
-            8,                                // allocatedDepth
-            8,                                // bitDepth
-            0,                                // rightShift
-            C2PlaneInfo::NATIVE,              // endianness
-        };
-    } else {
-        void *pointer = nullptr;
-        mMapper->lock(
-                const_cast<native_handle_t *>(mBuffer),
-                BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN,
-                { (int32_t)rect.left, (int32_t)rect.top, (int32_t)rect.width, (int32_t)rect.height },
-                // TODO: fence
-                hidl_handle(),
-                [&err, &pointer](const auto &maperr, const auto &mapPointer) {
-                    err = maperr2error(maperr);
-                    if (err == C2_OK) {
-                        pointer = mapPointer;
-                    }
-                });
-        if (err != C2_OK) {
-            return err;
+
+        case PixelFormat::RGBA_8888:
+            // TODO: alpha channel
+            // fall-through
+        case PixelFormat::RGBX_8888: {
+            void *pointer = nullptr;
+            mMapper->lock(
+                    const_cast<native_handle_t *>(mBuffer),
+                    BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN,
+                    { (int32_t)rect.left, (int32_t)rect.top, (int32_t)rect.width, (int32_t)rect.height },
+                    // TODO: fence
+                    hidl_handle(),
+                    [&err, &pointer](const auto &maperr, const auto &mapPointer) {
+                        err = maperr2error(maperr);
+                        if (err == C2_OK) {
+                            pointer = mapPointer;
+                        }
+                    });
+            if (err != C2_OK) {
+                return err;
+            }
+            addr[C2PlanarLayout::PLANE_R] = (uint8_t *)pointer;
+            addr[C2PlanarLayout::PLANE_G] = (uint8_t *)pointer + 1;
+            addr[C2PlanarLayout::PLANE_B] = (uint8_t *)pointer + 2;
+            layout->type = C2PlanarLayout::TYPE_RGB;
+            layout->numPlanes = 3;
+            layout->planes[C2PlanarLayout::PLANE_R] = {
+                C2PlaneInfo::CHANNEL_R,         // channel
+                4,                              // colInc
+                4 * (int32_t)mInfo.stride,      // rowInc
+                1,                              // mColSampling
+                1,                              // mRowSampling
+                8,                              // allocatedDepth
+                8,                              // bitDepth
+                0,                              // rightShift
+                C2PlaneInfo::NATIVE,            // endianness
+            };
+            layout->planes[C2PlanarLayout::PLANE_G] = {
+                C2PlaneInfo::CHANNEL_G,         // channel
+                4,                              // colInc
+                4 * (int32_t)mInfo.stride,      // rowInc
+                1,                              // mColSampling
+                1,                              // mRowSampling
+                8,                              // allocatedDepth
+                8,                              // bitDepth
+                0,                              // rightShift
+                C2PlaneInfo::NATIVE,            // endianness
+            };
+            layout->planes[C2PlanarLayout::PLANE_B] = {
+                C2PlaneInfo::CHANNEL_B,         // channel
+                4,                              // colInc
+                4 * (int32_t)mInfo.stride,      // rowInc
+                1,                              // mColSampling
+                1,                              // mRowSampling
+                8,                              // allocatedDepth
+                8,                              // bitDepth
+                0,                              // rightShift
+                C2PlaneInfo::NATIVE,            // endianness
+            };
+            break;
         }
-        // TODO
-        return C2_OMITTED;
+        default: {
+            return C2_OMITTED;
+        }
     }
     mLocked = true;
 
@@ -396,17 +467,20 @@
     // TODO: buffer usage should be determined according to |usage|
     (void) usage;
 
-    IMapper::BufferDescriptorInfo info = {
-        width,
-        height,
-        1u,  // layerCount
-        (PixelFormat)format,
-        BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN,
+    BufferDescriptorInfo info = {
+        {
+            width,
+            height,
+            1u,  // layerCount
+            (PixelFormat)format,
+            BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN,
+        },
+        0u,  // stride placeholder
     };
     c2_status_t err = C2_OK;
     BufferDescriptor desc;
     mMapper->createDescriptor(
-            info, [&err, &desc](const auto &maperr, const auto &descriptor) {
+            info.mapperInfo, [&err, &desc](const auto &maperr, const auto &descriptor) {
                 err = maperr2error(maperr);
                 if (err == C2_OK) {
                     desc = descriptor;
@@ -421,8 +495,7 @@
     mAllocator->allocate(
             desc,
             1u,
-            [&err, &buffer](const auto &maperr, const auto &stride, auto &buffers) {
-                (void) stride;
+            [&err, &buffer, &info](const auto &maperr, const auto &stride, auto &buffers) {
                 err = maperr2error(maperr);
                 if (err != C2_OK) {
                     return;
@@ -431,6 +504,7 @@
                     err = C2_CORRUPTED;
                     return;
                 }
+                info.stride = stride;
                 buffer = std::move(buffers[0]);
             });
     if (err != C2_OK) {
@@ -442,18 +516,20 @@
             info, mMapper, buffer,
             C2HandleGralloc::WrapNativeHandle(
                     buffer.getNativeHandle(),
-                    info.width, info.height, (uint32_t)info.format, info.usage)));
+                    info.mapperInfo.width, info.mapperInfo.height,
+                    (uint32_t)info.mapperInfo.format, info.mapperInfo.usage, info.stride)));
     return C2_OK;
 }
 
 c2_status_t C2AllocatorGralloc::Impl::priorGraphicAllocation(
         const C2Handle *handle,
         std::shared_ptr<C2GraphicAllocation> *allocation) {
-    IMapper::BufferDescriptorInfo info;
-    info.layerCount = 1u;
+    BufferDescriptorInfo info;
+    info.mapperInfo.layerCount = 1u;
     const C2HandleGralloc *grallocHandle = C2HandleGralloc::Import(
             handle,
-            &info.width, &info.height, (uint32_t *)&info.format, (uint64_t *)&info.usage);
+            &info.mapperInfo.width, &info.mapperInfo.height,
+            (uint32_t *)&info.mapperInfo.format, (uint64_t *)&info.mapperInfo.usage, &info.stride);
     if (grallocHandle == nullptr) {
         return C2_BAD_VALUE;
     }
@@ -461,7 +537,7 @@
     hidl_handle hidlHandle = C2HandleGralloc::UnwrapNativeHandle(grallocHandle);
 
     allocation->reset(new C2AllocationGralloc(info, mMapper, hidlHandle, grallocHandle));
-    return C2_OMITTED;
+    return C2_OK;
 }
 
 C2AllocatorGralloc::C2AllocatorGralloc() : mImpl(new Impl) {}
diff --git a/media/libstagefright/codec2/vndk/C2Store.cpp b/media/libstagefright/codec2/vndk/C2Store.cpp
index 555e77b..496cbe1 100644
--- a/media/libstagefright/codec2/vndk/C2Store.cpp
+++ b/media/libstagefright/codec2/vndk/C2Store.cpp
@@ -404,6 +404,7 @@
 C2PlatformComponentStore::C2PlatformComponentStore() {
     // TODO: move this also into a .so so it can be updated
     mComponents.emplace("c2.google.avc.decoder", "libstagefright_soft_c2avcdec.so");
+    mComponents.emplace("c2.google.avc.encoder", "libstagefright_soft_c2avcenc.so");
     mComponents.emplace("c2.google.aac.decoder", "libstagefright_soft_c2aacdec.so");
     mComponents.emplace("c2.google.aac.encoder", "libstagefright_soft_c2aacenc.so");
 }
diff --git a/media/libstagefright/codec2/vndk/include/C2AllocatorGralloc.h b/media/libstagefright/codec2/vndk/include/C2AllocatorGralloc.h
index 5311747..56fa317 100644
--- a/media/libstagefright/codec2/vndk/include/C2AllocatorGralloc.h
+++ b/media/libstagefright/codec2/vndk/include/C2AllocatorGralloc.h
@@ -1,4 +1,3 @@
-
 /*
  * Copyright (C) 2016 The Android Open Source Project
  *
@@ -32,7 +31,17 @@
  *
  * @return a new NON-OWNING native handle that must be deleted using native_handle_delete.
  */
-native_handle_t*UnwrapNativeCodec2GrallocHandle(const C2Handle *const handle);
+native_handle_t *UnwrapNativeCodec2GrallocHandle(const C2Handle *const handle);
+
+/**
+ * Wrap the gralloc handle and metadata into Codec2 handle recognized by
+ * C2AllocatorGralloc.
+ *
+ * @return a new NON-OWNING C2Handle that must be deleted using native_handle_delete.
+ */
+C2Handle *WrapNativeCodec2GrallocHandle(
+        const native_handle_t *const handle,
+        uint32_t width, uint32_t height, uint32_t format, uint64_t usage, uint32_t stride);
 
 class C2AllocatorGralloc : public C2Allocator {
 public:
diff --git a/media/libstagefright/codecs/aacdec/C2SoftAac.cpp b/media/libstagefright/codecs/aacdec/C2SoftAac.cpp
index 5ddfc14..b57c2aa 100644
--- a/media/libstagefright/codecs/aacdec/C2SoftAac.cpp
+++ b/media/libstagefright/codecs/aacdec/C2SoftAac.cpp
@@ -375,7 +375,6 @@
 
         work->worklets.front()->output.ordinal = work->input.ordinal;
         work->worklets.front()->output.buffers.clear();
-        work->worklets.front()->output.buffers.push_back(nullptr);
 
         return;
     }
@@ -602,7 +601,6 @@
         auto fillEmptyWork = [](const std::unique_ptr<C2Work> &work) {
             work->worklets.front()->output.flags = work->input.flags;
             work->worklets.front()->output.buffers.clear();
-            work->worklets.front()->output.buffers.emplace_back(nullptr);
             work->worklets.front()->output.ordinal = work->input.ordinal;
             work->workletsProcessed = 1u;
         };
diff --git a/media/libstagefright/codecs/aacenc/C2SoftAacEnc.cpp b/media/libstagefright/codecs/aacenc/C2SoftAacEnc.cpp
index 7bce21d..6f1b325 100644
--- a/media/libstagefright/codecs/aacenc/C2SoftAacEnc.cpp
+++ b/media/libstagefright/codecs/aacenc/C2SoftAacEnc.cpp
@@ -344,8 +344,6 @@
     if (nOutputBytes) {
         work->worklets.front()->output.buffers.push_back(
                 createLinearBuffer(block, 0, nOutputBytes));
-    } else {
-        work->worklets.front()->output.buffers.emplace_back(nullptr);
     }
 
 #if 0
diff --git a/media/libstagefright/codecs/avcdec/C2SoftAvcDec.cpp b/media/libstagefright/codecs/avcdec/C2SoftAvcDec.cpp
index cc12d3c..4f64f6e 100644
--- a/media/libstagefright/codecs/avcdec/C2SoftAvcDec.cpp
+++ b/media/libstagefright/codecs/avcdec/C2SoftAvcDec.cpp
@@ -211,7 +211,6 @@
     }
     work->worklets.front()->output.flags = (C2FrameData::flags_t)flags;
     work->worklets.front()->output.buffers.clear();
-    work->worklets.front()->output.buffers.emplace_back(nullptr);
     work->worklets.front()->output.ordinal = work->input.ordinal;
     work->workletsProcessed = 1u;
 }
diff --git a/media/libstagefright/codecs/avcenc/Android.bp b/media/libstagefright/codecs/avcenc/Android.bp
index cefe77c..67a2fdc 100644
--- a/media/libstagefright/codecs/avcenc/Android.bp
+++ b/media/libstagefright/codecs/avcenc/Android.bp
@@ -1,4 +1,48 @@
 cc_library_shared {
+    name: "libstagefright_soft_c2avcenc",
+//    vendor_available: true,
+//    vndk: {
+//        enabled: true,
+//    },
+
+    static_libs: [ "libavcenc" ],
+    srcs: ["C2SoftAvcEnc.cpp"],
+
+    include_dirs: [
+        "external/libavc/encoder",
+        "external/libavc/common",
+        "frameworks/av/media/libstagefright/include",
+        "frameworks/native/include/media/hardware",
+    ],
+
+    shared_libs: [
+        "libstagefright_codec2",
+        "libstagefright_codec2_vndk",
+        "libstagefright_foundation",
+        "libstagefright_simple_c2component",
+        "libutils",
+        "liblog",
+    ],
+
+    sanitize: {
+        misc_undefined: [
+            "signed-integer-overflow",
+        ],
+        cfi: true,
+        diag: {
+            cfi: true,
+        },
+    },
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wno-unused-variable",
+    ],
+    ldflags: ["-Wl,-Bsymbolic"],
+}
+
+cc_library_shared {
     name: "libstagefright_soft_avcenc",
     vendor_available: true,
     vndk: {
diff --git a/media/libstagefright/codecs/avcenc/C2SoftAvcEnc.cpp b/media/libstagefright/codecs/avcenc/C2SoftAvcEnc.cpp
new file mode 100644
index 0000000..7c281e3
--- /dev/null
+++ b/media/libstagefright/codecs/avcenc/C2SoftAvcEnc.cpp
@@ -0,0 +1,1239 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_NDEBUG 0
+#define LOG_TAG "C2SoftAvcEncEnc"
+#include <utils/Log.h>
+#include <utils/misc.h>
+
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/MediaDefs.h>
+#include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/MetaData.h>
+#include <C2PlatformSupport.h>
+#include <SimpleC2Interface.h>
+
+#include "ih264_typedefs.h"
+#include "ih264e.h"
+#include "ih264e_error.h"
+#include "iv2.h"
+#include "ive2.h"
+#include "C2SoftAvcEnc.h"
+
+namespace android {
+
+#define ive_api_function ih264e_api_function
+
+namespace {
+
+// From external/libavc/encoder/ih264e_bitstream.h
+constexpr uint32_t MIN_STREAM_SIZE = 0x800;
+
+static size_t GetCPUCoreCount() {
+    long cpuCoreCount = 1;
+#if defined(_SC_NPROCESSORS_ONLN)
+    cpuCoreCount = sysconf(_SC_NPROCESSORS_ONLN);
+#else
+    // _SC_NPROC_ONLN must be defined...
+    cpuCoreCount = sysconf(_SC_NPROC_ONLN);
+#endif
+    CHECK(cpuCoreCount >= 1);
+    ALOGV("Number of CPU cores: %ld", cpuCoreCount);
+    return (size_t)cpuCoreCount;
+}
+
+void ConvertRGBToPlanarYUV(
+        uint8_t *dstY, size_t dstStride, size_t dstVStride,
+        const C2GraphicView &src) {
+    CHECK((src.width() & 1) == 0);
+    CHECK((src.height() & 1) == 0);
+
+    uint8_t *dstU = dstY + dstStride * dstVStride;
+    uint8_t *dstV = dstU + (dstStride >> 1) * (dstVStride >> 1);
+
+    const C2PlanarLayout &layout = src.layout();
+    const uint8_t *pRed   = src.data()[C2PlanarLayout::PLANE_R];
+    const uint8_t *pGreen = src.data()[C2PlanarLayout::PLANE_G];
+    const uint8_t *pBlue  = src.data()[C2PlanarLayout::PLANE_B];
+
+    for (size_t y = 0; y < src.height(); ++y) {
+        for (size_t x = 0; x < src.width(); ++x) {
+            unsigned red   = *pRed;
+            unsigned green = *pGreen;
+            unsigned blue  = *pBlue;
+
+            // using ITU-R BT.601 conversion matrix
+            unsigned luma =
+                ((red * 66 + green * 129 + blue * 25) >> 8) + 16;
+
+            dstY[x] = luma;
+
+            if ((x & 1) == 0 && (y & 1) == 0) {
+                unsigned U =
+                    ((-red * 38 - green * 74 + blue * 112) >> 8) + 128;
+
+                unsigned V =
+                    ((red * 112 - green * 94 - blue * 18) >> 8) + 128;
+
+                dstU[x >> 1] = U;
+                dstV[x >> 1] = V;
+            }
+            pRed   += layout.planes[C2PlanarLayout::PLANE_R].colInc;
+            pGreen += layout.planes[C2PlanarLayout::PLANE_G].colInc;
+            pBlue  += layout.planes[C2PlanarLayout::PLANE_B].colInc;
+        }
+
+        if ((y & 1) == 0) {
+            dstU += dstStride >> 1;
+            dstV += dstStride >> 1;
+        }
+
+        pRed   -= layout.planes[C2PlanarLayout::PLANE_R].colInc * src.width();
+        pGreen -= layout.planes[C2PlanarLayout::PLANE_G].colInc * src.width();
+        pBlue  -= layout.planes[C2PlanarLayout::PLANE_B].colInc * src.width();
+        pRed   += layout.planes[C2PlanarLayout::PLANE_R].rowInc;
+        pGreen += layout.planes[C2PlanarLayout::PLANE_G].rowInc;
+        pBlue  += layout.planes[C2PlanarLayout::PLANE_B].rowInc;
+
+        dstY += dstStride;
+    }
+}
+
+}  // namespace
+
+C2SoftAvcEnc::C2SoftAvcEnc(const char *name, c2_node_id_t id)
+    : SimpleC2Component(
+          SimpleC2Interface::Builder(name, id)
+          .inputFormat(C2FormatVideo)
+          .outputFormat(C2FormatCompressed)
+          .build()),
+      mUpdateFlag(0),
+      mIvVideoColorFormat(IV_YUV_420P),
+      mAVCEncProfile(IV_PROFILE_BASE),
+      mAVCEncLevel(41),
+      mStarted(false),
+      mSawInputEOS(false),
+      mSawOutputEOS(false),
+      mSignalledError(false),
+      mCodecCtx(NULL),
+      mWidth(1080),
+      mHeight(1920),
+      mFramerate(60),
+      mBitrate(20000),
+      // TODO: output buffer size
+      mOutBufferSize(524288) {
+
+    // If dump is enabled, then open create an empty file
+    GENERATE_FILE_NAMES();
+    CREATE_DUMP_FILE(mInFile);
+    CREATE_DUMP_FILE(mOutFile);
+
+    initEncParams();
+}
+
+C2SoftAvcEnc::~C2SoftAvcEnc() {
+    releaseEncoder();
+}
+
+c2_status_t C2SoftAvcEnc::onInit() {
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::onStop() {
+    return C2_OK;
+}
+
+void C2SoftAvcEnc::onReset() {
+    // TODO: use IVE_CMD_CTL_RESET?
+    releaseEncoder();
+    initEncParams();
+}
+
+void C2SoftAvcEnc::onRelease() {
+    releaseEncoder();
+}
+
+c2_status_t C2SoftAvcEnc::onFlush_sm() {
+    // TODO: use IVE_CMD_CTL_FLUSH?
+    return C2_OK;
+}
+
+void  C2SoftAvcEnc::initEncParams() {
+    mCodecCtx = NULL;
+    mMemRecords = NULL;
+    mNumMemRecords = DEFAULT_MEM_REC_CNT;
+    mHeaderGenerated = 0;
+    mNumCores = GetCPUCoreCount();
+    mArch = DEFAULT_ARCH;
+    mSliceMode = DEFAULT_SLICE_MODE;
+    mSliceParam = DEFAULT_SLICE_PARAM;
+    mHalfPelEnable = DEFAULT_HPEL;
+    mIInterval = DEFAULT_I_INTERVAL;
+    mIDRInterval = DEFAULT_IDR_INTERVAL;
+    mDisableDeblkLevel = DEFAULT_DISABLE_DEBLK_LEVEL;
+    mEnableFastSad = DEFAULT_ENABLE_FAST_SAD;
+    mEnableAltRef = DEFAULT_ENABLE_ALT_REF;
+    mEncSpeed = DEFAULT_ENC_SPEED;
+    mIntra4x4 = DEFAULT_INTRA4x4;
+    mConstrainedIntraFlag = DEFAULT_CONSTRAINED_INTRA;
+    mAIRMode = DEFAULT_AIR;
+    mAIRRefreshPeriod = DEFAULT_AIR_REFRESH_PERIOD;
+    mPSNREnable = DEFAULT_PSNR_ENABLE;
+    mReconEnable = DEFAULT_RECON_ENABLE;
+    mEntropyMode = DEFAULT_ENTROPY_MODE;
+    mBframes = DEFAULT_B_FRAMES;
+
+    gettimeofday(&mTimeStart, NULL);
+    gettimeofday(&mTimeEnd, NULL);
+}
+
+c2_status_t C2SoftAvcEnc::setDimensions() {
+    ive_ctl_set_dimensions_ip_t s_dimensions_ip;
+    ive_ctl_set_dimensions_op_t s_dimensions_op;
+    IV_STATUS_T status;
+
+    s_dimensions_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_dimensions_ip.e_sub_cmd = IVE_CMD_CTL_SET_DIMENSIONS;
+    s_dimensions_ip.u4_ht = mHeight;
+    s_dimensions_ip.u4_wd = mWidth;
+
+    s_dimensions_ip.u4_timestamp_high = -1;
+    s_dimensions_ip.u4_timestamp_low = -1;
+
+    s_dimensions_ip.u4_size = sizeof(ive_ctl_set_dimensions_ip_t);
+    s_dimensions_op.u4_size = sizeof(ive_ctl_set_dimensions_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_dimensions_ip, &s_dimensions_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set frame dimensions = 0x%x\n",
+                s_dimensions_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setNumCores() {
+    IV_STATUS_T status;
+    ive_ctl_set_num_cores_ip_t s_num_cores_ip;
+    ive_ctl_set_num_cores_op_t s_num_cores_op;
+    s_num_cores_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_num_cores_ip.e_sub_cmd = IVE_CMD_CTL_SET_NUM_CORES;
+    s_num_cores_ip.u4_num_cores = MIN(mNumCores, CODEC_MAX_CORES);
+    s_num_cores_ip.u4_timestamp_high = -1;
+    s_num_cores_ip.u4_timestamp_low = -1;
+    s_num_cores_ip.u4_size = sizeof(ive_ctl_set_num_cores_ip_t);
+
+    s_num_cores_op.u4_size = sizeof(ive_ctl_set_num_cores_op_t);
+
+    status = ive_api_function(
+            mCodecCtx, (void *) &s_num_cores_ip, (void *) &s_num_cores_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set processor params = 0x%x\n",
+                s_num_cores_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setFrameRate() {
+    ive_ctl_set_frame_rate_ip_t s_frame_rate_ip;
+    ive_ctl_set_frame_rate_op_t s_frame_rate_op;
+    IV_STATUS_T status;
+
+    s_frame_rate_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_frame_rate_ip.e_sub_cmd = IVE_CMD_CTL_SET_FRAMERATE;
+
+    s_frame_rate_ip.u4_src_frame_rate = mFramerate;
+    s_frame_rate_ip.u4_tgt_frame_rate = mFramerate;
+
+    s_frame_rate_ip.u4_timestamp_high = -1;
+    s_frame_rate_ip.u4_timestamp_low = -1;
+
+    s_frame_rate_ip.u4_size = sizeof(ive_ctl_set_frame_rate_ip_t);
+    s_frame_rate_op.u4_size = sizeof(ive_ctl_set_frame_rate_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_frame_rate_ip, &s_frame_rate_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set frame rate = 0x%x\n",
+                s_frame_rate_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setIpeParams() {
+    ive_ctl_set_ipe_params_ip_t s_ipe_params_ip;
+    ive_ctl_set_ipe_params_op_t s_ipe_params_op;
+    IV_STATUS_T status;
+
+    s_ipe_params_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_ipe_params_ip.e_sub_cmd = IVE_CMD_CTL_SET_IPE_PARAMS;
+
+    s_ipe_params_ip.u4_enable_intra_4x4 = mIntra4x4;
+    s_ipe_params_ip.u4_enc_speed_preset = mEncSpeed;
+    s_ipe_params_ip.u4_constrained_intra_pred = mConstrainedIntraFlag;
+
+    s_ipe_params_ip.u4_timestamp_high = -1;
+    s_ipe_params_ip.u4_timestamp_low = -1;
+
+    s_ipe_params_ip.u4_size = sizeof(ive_ctl_set_ipe_params_ip_t);
+    s_ipe_params_op.u4_size = sizeof(ive_ctl_set_ipe_params_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_ipe_params_ip, &s_ipe_params_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set ipe params = 0x%x\n",
+                s_ipe_params_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setBitRate() {
+    ive_ctl_set_bitrate_ip_t s_bitrate_ip;
+    ive_ctl_set_bitrate_op_t s_bitrate_op;
+    IV_STATUS_T status;
+
+    s_bitrate_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_bitrate_ip.e_sub_cmd = IVE_CMD_CTL_SET_BITRATE;
+
+    s_bitrate_ip.u4_target_bitrate = mBitrate;
+
+    s_bitrate_ip.u4_timestamp_high = -1;
+    s_bitrate_ip.u4_timestamp_low = -1;
+
+    s_bitrate_ip.u4_size = sizeof(ive_ctl_set_bitrate_ip_t);
+    s_bitrate_op.u4_size = sizeof(ive_ctl_set_bitrate_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_bitrate_ip, &s_bitrate_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set bit rate = 0x%x\n", s_bitrate_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setFrameType(IV_PICTURE_CODING_TYPE_T e_frame_type) {
+    ive_ctl_set_frame_type_ip_t s_frame_type_ip;
+    ive_ctl_set_frame_type_op_t s_frame_type_op;
+    IV_STATUS_T status;
+    s_frame_type_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_frame_type_ip.e_sub_cmd = IVE_CMD_CTL_SET_FRAMETYPE;
+
+    s_frame_type_ip.e_frame_type = e_frame_type;
+
+    s_frame_type_ip.u4_timestamp_high = -1;
+    s_frame_type_ip.u4_timestamp_low = -1;
+
+    s_frame_type_ip.u4_size = sizeof(ive_ctl_set_frame_type_ip_t);
+    s_frame_type_op.u4_size = sizeof(ive_ctl_set_frame_type_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_frame_type_ip, &s_frame_type_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set frame type = 0x%x\n",
+                s_frame_type_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setQp() {
+    ive_ctl_set_qp_ip_t s_qp_ip;
+    ive_ctl_set_qp_op_t s_qp_op;
+    IV_STATUS_T status;
+
+    s_qp_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_qp_ip.e_sub_cmd = IVE_CMD_CTL_SET_QP;
+
+    s_qp_ip.u4_i_qp = DEFAULT_I_QP;
+    s_qp_ip.u4_i_qp_max = DEFAULT_QP_MAX;
+    s_qp_ip.u4_i_qp_min = DEFAULT_QP_MIN;
+
+    s_qp_ip.u4_p_qp = DEFAULT_P_QP;
+    s_qp_ip.u4_p_qp_max = DEFAULT_QP_MAX;
+    s_qp_ip.u4_p_qp_min = DEFAULT_QP_MIN;
+
+    s_qp_ip.u4_b_qp = DEFAULT_P_QP;
+    s_qp_ip.u4_b_qp_max = DEFAULT_QP_MAX;
+    s_qp_ip.u4_b_qp_min = DEFAULT_QP_MIN;
+
+    s_qp_ip.u4_timestamp_high = -1;
+    s_qp_ip.u4_timestamp_low = -1;
+
+    s_qp_ip.u4_size = sizeof(ive_ctl_set_qp_ip_t);
+    s_qp_op.u4_size = sizeof(ive_ctl_set_qp_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_qp_ip, &s_qp_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set qp 0x%x\n", s_qp_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setEncMode(IVE_ENC_MODE_T e_enc_mode) {
+    IV_STATUS_T status;
+    ive_ctl_set_enc_mode_ip_t s_enc_mode_ip;
+    ive_ctl_set_enc_mode_op_t s_enc_mode_op;
+
+    s_enc_mode_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_enc_mode_ip.e_sub_cmd = IVE_CMD_CTL_SET_ENC_MODE;
+
+    s_enc_mode_ip.e_enc_mode = e_enc_mode;
+
+    s_enc_mode_ip.u4_timestamp_high = -1;
+    s_enc_mode_ip.u4_timestamp_low = -1;
+
+    s_enc_mode_ip.u4_size = sizeof(ive_ctl_set_enc_mode_ip_t);
+    s_enc_mode_op.u4_size = sizeof(ive_ctl_set_enc_mode_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_enc_mode_ip, &s_enc_mode_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set in header encode mode = 0x%x\n",
+                s_enc_mode_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setVbvParams() {
+    ive_ctl_set_vbv_params_ip_t s_vbv_ip;
+    ive_ctl_set_vbv_params_op_t s_vbv_op;
+    IV_STATUS_T status;
+
+    s_vbv_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_vbv_ip.e_sub_cmd = IVE_CMD_CTL_SET_VBV_PARAMS;
+
+    s_vbv_ip.u4_vbv_buf_size = 0;
+    s_vbv_ip.u4_vbv_buffer_delay = 1000;
+
+    s_vbv_ip.u4_timestamp_high = -1;
+    s_vbv_ip.u4_timestamp_low = -1;
+
+    s_vbv_ip.u4_size = sizeof(ive_ctl_set_vbv_params_ip_t);
+    s_vbv_op.u4_size = sizeof(ive_ctl_set_vbv_params_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_vbv_ip, &s_vbv_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set VBV params = 0x%x\n", s_vbv_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setAirParams() {
+    ive_ctl_set_air_params_ip_t s_air_ip;
+    ive_ctl_set_air_params_op_t s_air_op;
+    IV_STATUS_T status;
+
+    s_air_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_air_ip.e_sub_cmd = IVE_CMD_CTL_SET_AIR_PARAMS;
+
+    s_air_ip.e_air_mode = mAIRMode;
+    s_air_ip.u4_air_refresh_period = mAIRRefreshPeriod;
+
+    s_air_ip.u4_timestamp_high = -1;
+    s_air_ip.u4_timestamp_low = -1;
+
+    s_air_ip.u4_size = sizeof(ive_ctl_set_air_params_ip_t);
+    s_air_op.u4_size = sizeof(ive_ctl_set_air_params_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_air_ip, &s_air_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set air params = 0x%x\n", s_air_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setMeParams() {
+    IV_STATUS_T status;
+    ive_ctl_set_me_params_ip_t s_me_params_ip;
+    ive_ctl_set_me_params_op_t s_me_params_op;
+
+    s_me_params_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_me_params_ip.e_sub_cmd = IVE_CMD_CTL_SET_ME_PARAMS;
+
+    s_me_params_ip.u4_enable_fast_sad = mEnableFastSad;
+    s_me_params_ip.u4_enable_alt_ref = mEnableAltRef;
+
+    s_me_params_ip.u4_enable_hpel = mHalfPelEnable;
+    s_me_params_ip.u4_enable_qpel = DEFAULT_QPEL;
+    s_me_params_ip.u4_me_speed_preset = DEFAULT_ME_SPEED;
+    s_me_params_ip.u4_srch_rng_x = DEFAULT_SRCH_RNG_X;
+    s_me_params_ip.u4_srch_rng_y = DEFAULT_SRCH_RNG_Y;
+
+    s_me_params_ip.u4_timestamp_high = -1;
+    s_me_params_ip.u4_timestamp_low = -1;
+
+    s_me_params_ip.u4_size = sizeof(ive_ctl_set_me_params_ip_t);
+    s_me_params_op.u4_size = sizeof(ive_ctl_set_me_params_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_me_params_ip, &s_me_params_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set me params = 0x%x\n", s_me_params_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setGopParams() {
+    IV_STATUS_T status;
+    ive_ctl_set_gop_params_ip_t s_gop_params_ip;
+    ive_ctl_set_gop_params_op_t s_gop_params_op;
+
+    s_gop_params_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_gop_params_ip.e_sub_cmd = IVE_CMD_CTL_SET_GOP_PARAMS;
+
+    s_gop_params_ip.u4_i_frm_interval = mIInterval;
+    s_gop_params_ip.u4_idr_frm_interval = mIDRInterval;
+
+    s_gop_params_ip.u4_timestamp_high = -1;
+    s_gop_params_ip.u4_timestamp_low = -1;
+
+    s_gop_params_ip.u4_size = sizeof(ive_ctl_set_gop_params_ip_t);
+    s_gop_params_op.u4_size = sizeof(ive_ctl_set_gop_params_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_gop_params_ip, &s_gop_params_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set GOP params = 0x%x\n",
+                s_gop_params_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setProfileParams() {
+    IV_STATUS_T status;
+    ive_ctl_set_profile_params_ip_t s_profile_params_ip;
+    ive_ctl_set_profile_params_op_t s_profile_params_op;
+
+    s_profile_params_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_profile_params_ip.e_sub_cmd = IVE_CMD_CTL_SET_PROFILE_PARAMS;
+
+    s_profile_params_ip.e_profile = DEFAULT_EPROFILE;
+    s_profile_params_ip.u4_entropy_coding_mode = mEntropyMode;
+    s_profile_params_ip.u4_timestamp_high = -1;
+    s_profile_params_ip.u4_timestamp_low = -1;
+
+    s_profile_params_ip.u4_size = sizeof(ive_ctl_set_profile_params_ip_t);
+    s_profile_params_op.u4_size = sizeof(ive_ctl_set_profile_params_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_profile_params_ip, &s_profile_params_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to set profile params = 0x%x\n",
+                s_profile_params_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setDeblockParams() {
+    IV_STATUS_T status;
+    ive_ctl_set_deblock_params_ip_t s_deblock_params_ip;
+    ive_ctl_set_deblock_params_op_t s_deblock_params_op;
+
+    s_deblock_params_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_deblock_params_ip.e_sub_cmd = IVE_CMD_CTL_SET_DEBLOCK_PARAMS;
+
+    s_deblock_params_ip.u4_disable_deblock_level = mDisableDeblkLevel;
+
+    s_deblock_params_ip.u4_timestamp_high = -1;
+    s_deblock_params_ip.u4_timestamp_low = -1;
+
+    s_deblock_params_ip.u4_size = sizeof(ive_ctl_set_deblock_params_ip_t);
+    s_deblock_params_op.u4_size = sizeof(ive_ctl_set_deblock_params_op_t);
+
+    status = ive_api_function(mCodecCtx, &s_deblock_params_ip, &s_deblock_params_op);
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to enable/disable deblock params = 0x%x\n",
+                s_deblock_params_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+    return C2_OK;
+}
+
+void C2SoftAvcEnc::logVersion() {
+    ive_ctl_getversioninfo_ip_t s_ctl_ip;
+    ive_ctl_getversioninfo_op_t s_ctl_op;
+    UWORD8 au1_buf[512];
+    IV_STATUS_T status;
+
+    s_ctl_ip.e_cmd = IVE_CMD_VIDEO_CTL;
+    s_ctl_ip.e_sub_cmd = IVE_CMD_CTL_GETVERSION;
+    s_ctl_ip.u4_size = sizeof(ive_ctl_getversioninfo_ip_t);
+    s_ctl_op.u4_size = sizeof(ive_ctl_getversioninfo_op_t);
+    s_ctl_ip.pu1_version = au1_buf;
+    s_ctl_ip.u4_version_bufsize = sizeof(au1_buf);
+
+    status = ive_api_function(mCodecCtx, (void *) &s_ctl_ip, (void *) &s_ctl_op);
+
+    if (status != IV_SUCCESS) {
+        ALOGE("Error in getting version: 0x%x", s_ctl_op.u4_error_code);
+    } else {
+        ALOGV("Ittiam encoder version: %s", (char *)s_ctl_ip.pu1_version);
+    }
+    return;
+}
+
+c2_status_t C2SoftAvcEnc::initEncoder() {
+    IV_STATUS_T status;
+    WORD32 level;
+    uint32_t displaySizeY;
+
+    CHECK(!mStarted);
+
+    c2_status_t errType = C2_OK;
+
+    displaySizeY = mWidth * mHeight;
+    if (displaySizeY > (1920 * 1088)) {
+        level = 50;
+    } else if (displaySizeY > (1280 * 720)) {
+        level = 40;
+    } else if (displaySizeY > (720 * 576)) {
+        level = 31;
+    } else if (displaySizeY > (624 * 320)) {
+        level = 30;
+    } else if (displaySizeY > (352 * 288)) {
+        level = 21;
+    } else if (displaySizeY > (176 * 144)) {
+        level = 20;
+    } else {
+        level = 10;
+    }
+    mAVCEncLevel = MAX(level, mAVCEncLevel);
+
+    mStride = mWidth;
+
+    // TODO
+    mIvVideoColorFormat = IV_YUV_420P;
+
+    ALOGD("Params width %d height %d level %d colorFormat %d", mWidth,
+            mHeight, mAVCEncLevel, mIvVideoColorFormat);
+
+    /* Getting Number of MemRecords */
+    {
+        iv_num_mem_rec_ip_t s_num_mem_rec_ip;
+        iv_num_mem_rec_op_t s_num_mem_rec_op;
+
+        s_num_mem_rec_ip.u4_size = sizeof(iv_num_mem_rec_ip_t);
+        s_num_mem_rec_op.u4_size = sizeof(iv_num_mem_rec_op_t);
+
+        s_num_mem_rec_ip.e_cmd = IV_CMD_GET_NUM_MEM_REC;
+
+        status = ive_api_function(0, &s_num_mem_rec_ip, &s_num_mem_rec_op);
+
+        if (status != IV_SUCCESS) {
+            ALOGE("Get number of memory records failed = 0x%x\n",
+                    s_num_mem_rec_op.u4_error_code);
+            return C2_CORRUPTED;
+        }
+
+        mNumMemRecords = s_num_mem_rec_op.u4_num_mem_rec;
+    }
+
+    /* Allocate array to hold memory records */
+    if (mNumMemRecords > SIZE_MAX / sizeof(iv_mem_rec_t)) {
+        ALOGE("requested memory size is too big.");
+        return C2_CORRUPTED;
+    }
+    mMemRecords = (iv_mem_rec_t *)malloc(mNumMemRecords * sizeof(iv_mem_rec_t));
+    if (NULL == mMemRecords) {
+        ALOGE("Unable to allocate memory for hold memory records: Size %zu",
+                mNumMemRecords * sizeof(iv_mem_rec_t));
+        mSignalledError = true;
+        // TODO: notify(error, C2_CORRUPTED, 0, 0);
+        return C2_CORRUPTED;
+    }
+
+    {
+        iv_mem_rec_t *ps_mem_rec;
+        ps_mem_rec = mMemRecords;
+        for (size_t i = 0; i < mNumMemRecords; i++) {
+            ps_mem_rec->u4_size = sizeof(iv_mem_rec_t);
+            ps_mem_rec->pv_base = NULL;
+            ps_mem_rec->u4_mem_size = 0;
+            ps_mem_rec->u4_mem_alignment = 0;
+            ps_mem_rec->e_mem_type = IV_NA_MEM_TYPE;
+
+            ps_mem_rec++;
+        }
+    }
+
+    /* Getting MemRecords Attributes */
+    {
+        iv_fill_mem_rec_ip_t s_fill_mem_rec_ip;
+        iv_fill_mem_rec_op_t s_fill_mem_rec_op;
+
+        s_fill_mem_rec_ip.u4_size = sizeof(iv_fill_mem_rec_ip_t);
+        s_fill_mem_rec_op.u4_size = sizeof(iv_fill_mem_rec_op_t);
+
+        s_fill_mem_rec_ip.e_cmd = IV_CMD_FILL_NUM_MEM_REC;
+        s_fill_mem_rec_ip.ps_mem_rec = mMemRecords;
+        s_fill_mem_rec_ip.u4_num_mem_rec = mNumMemRecords;
+        s_fill_mem_rec_ip.u4_max_wd = mWidth;
+        s_fill_mem_rec_ip.u4_max_ht = mHeight;
+        s_fill_mem_rec_ip.u4_max_level = mAVCEncLevel;
+        s_fill_mem_rec_ip.e_color_format = DEFAULT_INP_COLOR_FORMAT;
+        s_fill_mem_rec_ip.u4_max_ref_cnt = DEFAULT_MAX_REF_FRM;
+        s_fill_mem_rec_ip.u4_max_reorder_cnt = DEFAULT_MAX_REORDER_FRM;
+        s_fill_mem_rec_ip.u4_max_srch_rng_x = DEFAULT_MAX_SRCH_RANGE_X;
+        s_fill_mem_rec_ip.u4_max_srch_rng_y = DEFAULT_MAX_SRCH_RANGE_Y;
+
+        status = ive_api_function(0, &s_fill_mem_rec_ip, &s_fill_mem_rec_op);
+
+        if (status != IV_SUCCESS) {
+            ALOGE("Fill memory records failed = 0x%x\n",
+                    s_fill_mem_rec_op.u4_error_code);
+            mSignalledError = true;
+            // TODO: notify(error, C2_CORRUPTED, 0, 0);
+            return C2_CORRUPTED;
+        }
+    }
+
+    /* Allocating Memory for Mem Records */
+    {
+        WORD32 total_size;
+        iv_mem_rec_t *ps_mem_rec;
+        total_size = 0;
+        ps_mem_rec = mMemRecords;
+
+        for (size_t i = 0; i < mNumMemRecords; i++) {
+            ps_mem_rec->pv_base = ive_aligned_malloc(
+                    ps_mem_rec->u4_mem_alignment, ps_mem_rec->u4_mem_size);
+            if (ps_mem_rec->pv_base == NULL) {
+                ALOGE("Allocation failure for mem record id %zu size %u\n", i,
+                        ps_mem_rec->u4_mem_size);
+                mSignalledError = true;
+                // TODO: notify(error, C2_CORRUPTED, 0, 0);
+                return C2_CORRUPTED;
+
+            }
+            total_size += ps_mem_rec->u4_mem_size;
+
+            ps_mem_rec++;
+        }
+    }
+
+    /* Codec Instance Creation */
+    {
+        ive_init_ip_t s_init_ip;
+        ive_init_op_t s_init_op;
+
+        mCodecCtx = (iv_obj_t *)mMemRecords[0].pv_base;
+        mCodecCtx->u4_size = sizeof(iv_obj_t);
+        mCodecCtx->pv_fxns = (void *)ive_api_function;
+
+        s_init_ip.u4_size = sizeof(ive_init_ip_t);
+        s_init_op.u4_size = sizeof(ive_init_op_t);
+
+        s_init_ip.e_cmd = IV_CMD_INIT;
+        s_init_ip.u4_num_mem_rec = mNumMemRecords;
+        s_init_ip.ps_mem_rec = mMemRecords;
+        s_init_ip.u4_max_wd = mWidth;
+        s_init_ip.u4_max_ht = mHeight;
+        s_init_ip.u4_max_ref_cnt = DEFAULT_MAX_REF_FRM;
+        s_init_ip.u4_max_reorder_cnt = DEFAULT_MAX_REORDER_FRM;
+        s_init_ip.u4_max_level = mAVCEncLevel;
+        s_init_ip.e_inp_color_fmt = mIvVideoColorFormat;
+
+        if (mReconEnable || mPSNREnable) {
+            s_init_ip.u4_enable_recon = 1;
+        } else {
+            s_init_ip.u4_enable_recon = 0;
+        }
+        s_init_ip.e_recon_color_fmt = DEFAULT_RECON_COLOR_FORMAT;
+        s_init_ip.e_rc_mode = DEFAULT_RC_MODE;
+        s_init_ip.u4_max_framerate = DEFAULT_MAX_FRAMERATE;
+        s_init_ip.u4_max_bitrate = DEFAULT_MAX_BITRATE;
+        s_init_ip.u4_num_bframes = mBframes;
+        s_init_ip.e_content_type = IV_PROGRESSIVE;
+        s_init_ip.u4_max_srch_rng_x = DEFAULT_MAX_SRCH_RANGE_X;
+        s_init_ip.u4_max_srch_rng_y = DEFAULT_MAX_SRCH_RANGE_Y;
+        s_init_ip.e_slice_mode = mSliceMode;
+        s_init_ip.u4_slice_param = mSliceParam;
+        s_init_ip.e_arch = mArch;
+        s_init_ip.e_soc = DEFAULT_SOC;
+
+        status = ive_api_function(mCodecCtx, &s_init_ip, &s_init_op);
+
+        if (status != IV_SUCCESS) {
+            ALOGE("Init encoder failed = 0x%x\n", s_init_op.u4_error_code);
+            mSignalledError = true;
+            // TODO: notify(error, C2_CORRUPTED, 0 /* arg2 */, NULL /* data */);
+            return C2_CORRUPTED;
+        }
+    }
+
+    /* Get Codec Version */
+    logVersion();
+
+    /* set processor details */
+    setNumCores();
+
+    /* Video control Set Frame dimensions */
+    setDimensions();
+
+    /* Video control Set Frame rates */
+    setFrameRate();
+
+    /* Video control Set IPE Params */
+    setIpeParams();
+
+    /* Video control Set Bitrate */
+    setBitRate();
+
+    /* Video control Set QP */
+    setQp();
+
+    /* Video control Set AIR params */
+    setAirParams();
+
+    /* Video control Set VBV params */
+    setVbvParams();
+
+    /* Video control Set Motion estimation params */
+    setMeParams();
+
+    /* Video control Set GOP params */
+    setGopParams();
+
+    /* Video control Set Deblock params */
+    setDeblockParams();
+
+    /* Video control Set Profile params */
+    setProfileParams();
+
+    /* Video control Set in Encode header mode */
+    setEncMode(IVE_ENC_MODE_HEADER);
+
+    ALOGV("init_codec successfull");
+
+    mSpsPpsHeaderReceived = false;
+    mStarted = true;
+
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::releaseEncoder() {
+    IV_STATUS_T status = IV_SUCCESS;
+    iv_retrieve_mem_rec_ip_t s_retrieve_mem_ip;
+    iv_retrieve_mem_rec_op_t s_retrieve_mem_op;
+    iv_mem_rec_t *ps_mem_rec;
+
+    if (!mStarted) {
+        return C2_OK;
+    }
+
+    s_retrieve_mem_ip.u4_size = sizeof(iv_retrieve_mem_rec_ip_t);
+    s_retrieve_mem_op.u4_size = sizeof(iv_retrieve_mem_rec_op_t);
+    s_retrieve_mem_ip.e_cmd = IV_CMD_RETRIEVE_MEMREC;
+    s_retrieve_mem_ip.ps_mem_rec = mMemRecords;
+
+    status = ive_api_function(mCodecCtx, &s_retrieve_mem_ip, &s_retrieve_mem_op);
+
+    if (status != IV_SUCCESS) {
+        ALOGE("Unable to retrieve memory records = 0x%x\n",
+                s_retrieve_mem_op.u4_error_code);
+        return C2_CORRUPTED;
+    }
+
+    /* Free memory records */
+    ps_mem_rec = mMemRecords;
+    for (size_t i = 0; i < s_retrieve_mem_op.u4_num_mem_rec_filled; i++) {
+        ive_aligned_free(ps_mem_rec->pv_base);
+        ps_mem_rec++;
+    }
+
+    free(mMemRecords);
+
+    // clear other pointers into the space being free()d
+    mCodecCtx = NULL;
+
+    mStarted = false;
+
+    return C2_OK;
+}
+
+c2_status_t C2SoftAvcEnc::setEncodeArgs(
+        ive_video_encode_ip_t *ps_encode_ip,
+        ive_video_encode_op_t *ps_encode_op,
+        const C2GraphicView *const input,
+        uint8_t *base,
+        uint32_t capacity,
+        uint64_t timestamp) {
+    iv_raw_buf_t *ps_inp_raw_buf;
+
+    ps_inp_raw_buf = &ps_encode_ip->s_inp_buf;
+    ps_encode_ip->s_out_buf.pv_buf = base;
+    ps_encode_ip->s_out_buf.u4_bytes = 0;
+    ps_encode_ip->s_out_buf.u4_bufsize = capacity;
+    ps_encode_ip->u4_size = sizeof(ive_video_encode_ip_t);
+    ps_encode_op->u4_size = sizeof(ive_video_encode_op_t);
+
+    ps_encode_ip->e_cmd = IVE_CMD_VIDEO_ENCODE;
+    ps_encode_ip->pv_bufs = NULL;
+    ps_encode_ip->pv_mb_info = NULL;
+    ps_encode_ip->pv_pic_info = NULL;
+    ps_encode_ip->u4_mb_info_type = 0;
+    ps_encode_ip->u4_pic_info_type = 0;
+    ps_encode_ip->u4_is_last = 0;
+    ps_encode_ip->u4_timestamp_high = timestamp >> 32;
+    ps_encode_ip->u4_timestamp_low = timestamp & 0xFFFFFFFF;
+    ps_encode_op->s_out_buf.pv_buf = NULL;
+
+    /* Initialize color formats */
+    memset(ps_inp_raw_buf, 0, sizeof(iv_raw_buf_t));
+    ps_inp_raw_buf->u4_size = sizeof(iv_raw_buf_t);
+    ps_inp_raw_buf->e_color_fmt = mIvVideoColorFormat;
+    if (input == nullptr) {
+        if (mSawInputEOS){
+            ps_encode_ip->u4_is_last = 1;
+        }
+        return C2_OK;
+    }
+
+    ALOGV("width = %d, height = %d", input->width(), input->height());
+    const C2PlanarLayout &layout = input->layout();
+    uint8_t *yPlane = const_cast<uint8_t *>(input->data()[C2PlanarLayout::PLANE_Y]);
+    uint8_t *uPlane = const_cast<uint8_t *>(input->data()[C2PlanarLayout::PLANE_U]);
+    uint8_t *vPlane = const_cast<uint8_t *>(input->data()[C2PlanarLayout::PLANE_V]);
+    int32_t yStride = layout.planes[C2PlanarLayout::PLANE_Y].rowInc;
+    int32_t uStride = layout.planes[C2PlanarLayout::PLANE_U].rowInc;
+    int32_t vStride = layout.planes[C2PlanarLayout::PLANE_V].rowInc;
+
+    switch (layout.type) {
+        case C2PlanarLayout::TYPE_RGB:
+            // fall-through
+        case C2PlanarLayout::TYPE_RGBA: {
+            size_t yPlaneSize = input->width() * input->height();
+            std::unique_ptr<uint8_t[]> freeBuffer;
+            if (mFreeConversionBuffers.empty()) {
+                freeBuffer.reset(new uint8_t[yPlaneSize * 3 / 2]);
+            } else {
+                freeBuffer.swap(mFreeConversionBuffers.front());
+                mFreeConversionBuffers.pop_front();
+            }
+            yPlane = freeBuffer.get();
+            mConversionBuffersInUse.push_back(std::move(freeBuffer));
+            uPlane = yPlane + yPlaneSize;
+            vPlane = uPlane + yPlaneSize / 4;
+            yStride = input->width();
+            uStride = vStride = input->width() / 2;
+            ConvertRGBToPlanarYUV(yPlane, yStride, input->height(), *input);
+            break;
+        }
+        case C2PlanarLayout::TYPE_YUV:
+            // fall-through
+        case C2PlanarLayout::TYPE_YUVA:
+            // Do nothing
+            break;
+        default:
+            ALOGE("Unrecognized plane type: %d", layout.type);
+            return C2_BAD_VALUE;
+    }
+
+    switch (mIvVideoColorFormat) {
+        case IV_YUV_420P:
+        {
+            // input buffer is supposed to be const but Ittiam API wants bare pointer.
+            ps_inp_raw_buf->apv_bufs[0] = yPlane;
+            ps_inp_raw_buf->apv_bufs[1] = uPlane;
+            ps_inp_raw_buf->apv_bufs[2] = vPlane;
+
+            ps_inp_raw_buf->au4_wd[0] = input->width();
+            ps_inp_raw_buf->au4_wd[1] = input->width() / 2;
+            ps_inp_raw_buf->au4_wd[2] = input->width() / 2;
+
+            ps_inp_raw_buf->au4_ht[0] = input->height();
+            ps_inp_raw_buf->au4_ht[1] = input->height() / 2;
+            ps_inp_raw_buf->au4_ht[2] = input->height() / 2;
+
+            ps_inp_raw_buf->au4_strd[0] = yStride;
+            ps_inp_raw_buf->au4_strd[1] = uStride;
+            ps_inp_raw_buf->au4_strd[2] = vStride;
+            break;
+        }
+
+        case IV_YUV_422ILE:
+        {
+            // TODO
+            // ps_inp_raw_buf->apv_bufs[0] = pu1_buf;
+            // ps_inp_raw_buf->au4_wd[0] = mWidth * 2;
+            // ps_inp_raw_buf->au4_ht[0] = mHeight;
+            // ps_inp_raw_buf->au4_strd[0] = mStride * 2;
+            break;
+        }
+
+        case IV_YUV_420SP_UV:
+        case IV_YUV_420SP_VU:
+        default:
+        {
+            ps_inp_raw_buf->apv_bufs[0] = yPlane;
+            ps_inp_raw_buf->apv_bufs[1] = uPlane;
+
+            ps_inp_raw_buf->au4_wd[0] = input->width();
+            ps_inp_raw_buf->au4_wd[1] = input->width();
+
+            ps_inp_raw_buf->au4_ht[0] = input->height();
+            ps_inp_raw_buf->au4_ht[1] = input->height() / 2;
+
+            ps_inp_raw_buf->au4_strd[0] = yStride;
+            ps_inp_raw_buf->au4_strd[1] = uStride;
+            break;
+        }
+    }
+    return C2_OK;
+}
+
+void C2SoftAvcEnc::process(
+        const std::unique_ptr<C2Work> &work,
+        const std::shared_ptr<C2BlockPool> &pool) {
+    work->workletsProcessed = 0u;
+
+    IV_STATUS_T status;
+    WORD32 timeDelay, timeTaken;
+    uint64_t timestamp = work->input.ordinal.timestamp.peekull();
+
+    // Initialize encoder if not already initialized
+    if (mCodecCtx == NULL) {
+        if (C2_OK != initEncoder()) {
+            ALOGE("Failed to initialize encoder");
+            // TODO: notify(error, C2_CORRUPTED, 0 /* arg2 */, NULL /* data */);
+            return;
+        }
+    }
+    if (mSignalledError) {
+        return;
+    }
+
+    // while (!mSawOutputEOS && !outQueue.empty()) {
+    c2_status_t error;
+    ive_video_encode_ip_t s_encode_ip;
+    ive_video_encode_op_t s_encode_op;
+
+    if (!mSpsPpsHeaderReceived) {
+        constexpr uint32_t kHeaderLength = MIN_STREAM_SIZE;
+        uint8_t header[kHeaderLength];
+        error = setEncodeArgs(
+                &s_encode_ip, &s_encode_op, NULL, header, kHeaderLength, timestamp);
+        if (error != C2_OK) {
+            mSignalledError = true;
+            // TODO: notify(error, C2_CORRUPTED, 0, 0);
+            return;
+        }
+        status = ive_api_function(mCodecCtx, &s_encode_ip, &s_encode_op);
+
+        if (IV_SUCCESS != status) {
+            ALOGE("Encode header failed = 0x%x\n",
+                    s_encode_op.u4_error_code);
+            return;
+        } else {
+            ALOGV("Bytes Generated in header %d\n",
+                    s_encode_op.s_out_buf.u4_bytes);
+        }
+
+        mSpsPpsHeaderReceived = true;
+
+        std::unique_ptr<C2StreamCsdInfo::output> csd =
+            C2StreamCsdInfo::output::alloc_unique(s_encode_op.s_out_buf.u4_bytes, 0u);
+        memcpy(csd->m.value, header, s_encode_op.s_out_buf.u4_bytes);
+        work->worklets.front()->output.configUpdate.push_back(std::move(csd));
+
+        DUMP_TO_FILE(
+                mOutFile, csd->m.value, csd->flexCount());
+    }
+
+    if (mUpdateFlag) {
+        if (mUpdateFlag & kUpdateBitrate) {
+            setBitRate();
+        }
+        if (mUpdateFlag & kRequestKeyFrame) {
+            setFrameType(IV_IDR_FRAME);
+        }
+        if (mUpdateFlag & kUpdateAIRMode) {
+            setAirParams();
+            // notify(OMX_EventPortSettingsChanged, kOutputPortIndex,
+            //         OMX_IndexConfigAndroidIntraRefresh, NULL);
+        }
+        mUpdateFlag = 0;
+    }
+
+    if (work->input.flags & C2FrameData::FLAG_END_OF_STREAM) {
+        mSawInputEOS = true;
+    }
+
+    /* In normal mode, store inputBufferInfo and this will be returned
+       when encoder consumes this input */
+    // if (!mInputDataIsMeta && (inputBufferInfo != NULL)) {
+    //     for (size_t i = 0; i < MAX_INPUT_BUFFER_HEADERS; i++) {
+    //         if (NULL == mInputBufferInfo[i]) {
+    //             mInputBufferInfo[i] = inputBufferInfo;
+    //             break;
+    //         }
+    //     }
+    // }
+    const C2GraphicView view =
+        work->input.buffers[0]->data().graphicBlocks().front().map().get();
+    if (view.error() != C2_OK) {
+        ALOGE("graphic view map err = %d", view.error());
+        return;
+    }
+
+    std::shared_ptr<C2LinearBlock> block;
+
+    do {
+        C2MemoryUsage usage = { C2MemoryUsage::CPU_READ, C2MemoryUsage::CPU_WRITE };
+        // TODO: error handling, proper usage, etc.
+        c2_status_t err = pool->fetchLinearBlock(mOutBufferSize, usage, &block);
+        if (err != C2_OK) {
+            ALOGE("fetch linear block err = %d", err);
+            return;
+        }
+        C2WriteView wView = block->map().get();
+        if (wView.error() != C2_OK) {
+            ALOGE("write view map err = %d", wView.error());
+            return;
+        }
+
+        error = setEncodeArgs(
+                &s_encode_ip, &s_encode_op, &view, wView.base(), wView.capacity(), timestamp);
+        if (error != C2_OK) {
+            mSignalledError = true;
+            ALOGE("setEncodeArgs failed : %d", error);
+            // TODO: notify(error, C2_CORRUPTED, 0, 0);
+            return;
+        }
+
+        // DUMP_TO_FILE(
+        //         mInFile, s_encode_ip.s_inp_buf.apv_bufs[0],
+        //         (mHeight * mStride * 3 / 2));
+
+        GETTIME(&mTimeStart, NULL);
+        /* Compute time elapsed between end of previous decode()
+         * to start of current decode() */
+        TIME_DIFF(mTimeEnd, mTimeStart, timeDelay);
+        status = ive_api_function(mCodecCtx, &s_encode_ip, &s_encode_op);
+
+        if (IV_SUCCESS != status) {
+            if ((s_encode_op.u4_error_code & 0xFF) == IH264E_BITSTREAM_BUFFER_OVERFLOW) {
+                // TODO: use IVE_CMD_CTL_GETBUFINFO for proper max input size?
+                mOutBufferSize *= 2;
+                continue;
+            }
+            ALOGE("Encode Frame failed = 0x%x\n",
+                    s_encode_op.u4_error_code);
+            mSignalledError = true;
+            // TODO: notify(error, C2_CORRUPTED, 0, 0);
+            return;
+        }
+    } while (IV_SUCCESS != status);
+
+    // Hold input buffer reference
+    mBuffers[s_encode_ip.s_inp_buf.apv_bufs[0]] = work->input.buffers[0];
+
+    GETTIME(&mTimeEnd, NULL);
+    /* Compute time taken for decode() */
+    TIME_DIFF(mTimeStart, mTimeEnd, timeTaken);
+
+    ALOGV("timeTaken=%6d delay=%6d numBytes=%6d", timeTaken, timeDelay,
+            s_encode_op.s_out_buf.u4_bytes);
+
+    void *freed = s_encode_op.s_inp_buf.apv_bufs[0];
+    /* If encoder frees up an input buffer, mark it as free */
+    if (freed != NULL) {
+        if (mBuffers.count(freed) == 0u) {
+            // TODO: error
+            return;
+        }
+        // Release input buffer reference
+        mBuffers.erase(freed);
+
+        auto it = std::find_if(
+                mConversionBuffersInUse.begin(), mConversionBuffersInUse.end(),
+                [freed](const auto &elem) { return elem.get() == freed; });
+        if (it != mConversionBuffersInUse.end()) {
+            mFreeConversionBuffers.push_back(std::move(*it));
+            mConversionBuffersInUse.erase(it);
+        }
+    }
+
+    work->worklets.front()->output.flags = work->input.flags;
+    work->worklets.front()->output.ordinal = work->input.ordinal;
+    work->worklets.front()->output.ordinal.timestamp =
+        ((uint64_t)s_encode_op.u4_timestamp_high << 32) | s_encode_op.u4_timestamp_low;
+    work->worklets.front()->output.buffers.clear();
+    std::shared_ptr<C2Buffer> buffer =
+        createLinearBuffer(block, 0, s_encode_op.s_out_buf.u4_bytes);
+    work->worklets.front()->output.buffers.push_back(buffer);
+    work->workletsProcessed = 1u;
+
+    if (IV_IDR_FRAME == s_encode_op.u4_encoded_frame_type) {
+        buffer->setInfo(std::make_shared<C2StreamPictureTypeMaskInfo::output>(
+                0u /* stream id */, C2PictureTypeKeyFrame));
+    }
+
+    if (s_encode_op.u4_is_last) {
+        // outputBufferHeader->nFlags |= OMX_BUFFERFLAG_EOS;
+        mSawOutputEOS = true;
+    } else {
+        // outputBufferHeader->nFlags &= ~OMX_BUFFERFLAG_EOS;
+    }
+}
+
+c2_status_t C2SoftAvcEnc::drain(
+        uint32_t drainMode,
+        const std::shared_ptr<C2BlockPool> &pool) {
+    // TODO: use IVE_CMD_CTL_FLUSH?
+    (void)drainMode;
+    (void)pool;
+    return C2_OK;
+}
+
+
+class C2SoftAvcEncFactory : public C2ComponentFactory {
+public:
+    virtual c2_status_t createComponent(
+            c2_node_id_t id, std::shared_ptr<C2Component>* const component,
+            std::function<void(::android::C2Component*)> deleter) override {
+        *component = std::shared_ptr<C2Component>(new C2SoftAvcEnc("avcenc", id), deleter);
+        return C2_OK;
+    }
+
+    virtual c2_status_t createInterface(
+            c2_node_id_t id, std::shared_ptr<C2ComponentInterface>* const interface,
+            std::function<void(::android::C2ComponentInterface*)> deleter) override {
+        *interface =
+              SimpleC2Interface::Builder("avcenc", id, deleter)
+              .inputFormat(C2FormatVideo)
+              .outputFormat(C2FormatCompressed)
+              .build();
+        return C2_OK;
+    }
+
+    virtual ~C2SoftAvcEncFactory() override = default;
+};
+
+}  // namespace android
+
+extern "C" ::android::C2ComponentFactory* CreateCodec2Factory() {
+    ALOGV("in %s", __func__);
+    return new ::android::C2SoftAvcEncFactory();
+}
+
+extern "C" void DestroyCodec2Factory(::android::C2ComponentFactory* factory) {
+    ALOGV("in %s", __func__);
+    delete factory;
+}
diff --git a/media/libstagefright/codecs/avcenc/C2SoftAvcEnc.h b/media/libstagefright/codecs/avcenc/C2SoftAvcEnc.h
new file mode 100644
index 0000000..5b2a514
--- /dev/null
+++ b/media/libstagefright/codecs/avcenc/C2SoftAvcEnc.h
@@ -0,0 +1,293 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef C2_SOFT_AVC_ENC_H__
+#define C2_SOFT_AVC_ENC_H__
+
+#include <media/stagefright/foundation/ABase.h>
+#include <utils/Vector.h>
+
+#include <SimpleC2Component.h>
+
+namespace android {
+
+#define CODEC_MAX_CORES          4
+#define LEN_STATUS_BUFFER        (10  * 1024)
+#define MAX_VBV_BUFF_SIZE        (120 * 16384)
+#define MAX_NUM_IO_BUFS           3
+
+#define DEFAULT_MAX_REF_FRM         2
+#define DEFAULT_MAX_REORDER_FRM     0
+#define DEFAULT_QP_MIN              10
+#define DEFAULT_QP_MAX              40
+#define DEFAULT_MAX_BITRATE         20000000
+#define DEFAULT_MAX_SRCH_RANGE_X    256
+#define DEFAULT_MAX_SRCH_RANGE_Y    256
+#define DEFAULT_MAX_FRAMERATE       120000
+#define DEFAULT_NUM_CORES           1
+#define DEFAULT_NUM_CORES_PRE_ENC   0
+#define DEFAULT_FPS                 30
+#define DEFAULT_ENC_SPEED           IVE_NORMAL
+
+#define DEFAULT_MEM_REC_CNT         0
+#define DEFAULT_RECON_ENABLE        0
+#define DEFAULT_CHKSUM_ENABLE       0
+#define DEFAULT_START_FRM           0
+#define DEFAULT_NUM_FRMS            0xFFFFFFFF
+#define DEFAULT_INP_COLOR_FORMAT       IV_YUV_420SP_VU
+#define DEFAULT_RECON_COLOR_FORMAT     IV_YUV_420P
+#define DEFAULT_LOOPBACK            0
+#define DEFAULT_SRC_FRAME_RATE      30
+#define DEFAULT_TGT_FRAME_RATE      30
+#define DEFAULT_MAX_WD              1920
+#define DEFAULT_MAX_HT              1920
+#define DEFAULT_MAX_LEVEL           41
+#define DEFAULT_STRIDE              0
+#define DEFAULT_WD                  1280
+#define DEFAULT_HT                  720
+#define DEFAULT_PSNR_ENABLE         0
+#define DEFAULT_ME_SPEED            100
+#define DEFAULT_ENABLE_FAST_SAD     0
+#define DEFAULT_ENABLE_ALT_REF      0
+#define DEFAULT_RC_MODE             IVE_RC_STORAGE
+#define DEFAULT_BITRATE             6000000
+#define DEFAULT_I_QP                22
+#define DEFAULT_I_QP_MAX            DEFAULT_QP_MAX
+#define DEFAULT_I_QP_MIN            DEFAULT_QP_MIN
+#define DEFAULT_P_QP                28
+#define DEFAULT_P_QP_MAX            DEFAULT_QP_MAX
+#define DEFAULT_P_QP_MIN            DEFAULT_QP_MIN
+#define DEFAULT_B_QP                22
+#define DEFAULT_B_QP_MAX            DEFAULT_QP_MAX
+#define DEFAULT_B_QP_MIN            DEFAULT_QP_MIN
+#define DEFAULT_AIR                 IVE_AIR_MODE_NONE
+#define DEFAULT_AIR_REFRESH_PERIOD  30
+#define DEFAULT_SRCH_RNG_X          64
+#define DEFAULT_SRCH_RNG_Y          48
+#define DEFAULT_I_INTERVAL          30
+#define DEFAULT_IDR_INTERVAL        1000
+#define DEFAULT_B_FRAMES            0
+#define DEFAULT_DISABLE_DEBLK_LEVEL 0
+#define DEFAULT_HPEL                1
+#define DEFAULT_QPEL                1
+#define DEFAULT_I4                  1
+#define DEFAULT_EPROFILE            IV_PROFILE_BASE
+#define DEFAULT_ENTROPY_MODE        0
+#define DEFAULT_SLICE_MODE          IVE_SLICE_MODE_NONE
+#define DEFAULT_SLICE_PARAM         256
+#define DEFAULT_ARCH                ARCH_ARM_A9Q
+#define DEFAULT_SOC                 SOC_GENERIC
+#define DEFAULT_INTRA4x4            0
+#define STRLENGTH                   500
+#define DEFAULT_CONSTRAINED_INTRA   0
+
+#define MIN(a, b) ((a) < (b))? (a) : (b)
+#define MAX(a, b) ((a) > (b))? (a) : (b)
+#define ALIGN16(x) ((((x) + 15) >> 4) << 4)
+#define ALIGN128(x) ((((x) + 127) >> 7) << 7)
+#define ALIGN4096(x) ((((x) + 4095) >> 12) << 12)
+
+/** Used to remove warnings about unused parameters */
+#define UNUSED(x) ((void)(x))
+
+/** Get time */
+#define GETTIME(a, b) gettimeofday(a, b);
+
+/** Compute difference between start and end */
+#define TIME_DIFF(start, end, diff) \
+    diff = (((end).tv_sec - (start).tv_sec) * 1000000) + \
+            ((end).tv_usec - (start).tv_usec);
+
+#define ive_aligned_malloc(alignment, size) memalign(alignment, size)
+#define ive_aligned_free(buf) free(buf)
+
+struct C2SoftAvcEnc : public SimpleC2Component {
+    C2SoftAvcEnc(const char *name, c2_node_id_t id);
+
+    // From SimpleC2Component
+    c2_status_t onInit() override;
+    c2_status_t onStop() override;
+    void onReset() override;
+    void onRelease() override;
+    c2_status_t onFlush_sm() override;
+    void process(
+            const std::unique_ptr<C2Work> &work,
+            const std::shared_ptr<C2BlockPool> &pool) override;
+    c2_status_t drain(
+            uint32_t drainMode,
+            const std::shared_ptr<C2BlockPool> &pool) override;
+
+protected:
+    virtual ~C2SoftAvcEnc();
+
+private:
+    enum {
+        kUpdateBitrate            = 1 << 0,
+        kRequestKeyFrame          = 1 << 1,
+        kUpdateAIRMode            = 1 << 2,
+    };
+
+    // OMX input buffer's timestamp and flags
+    typedef struct {
+        int64_t mTimeUs;
+        int32_t mFlags;
+    } InputBufferInfo;
+
+    int32_t mStride;
+
+    struct timeval mTimeStart;   // Time at the start of decode()
+    struct timeval mTimeEnd;     // Time at the end of decode()
+
+    int mUpdateFlag;
+
+#ifdef FILE_DUMP_ENABLE
+    char mInFile[200];
+    char mOutFile[200];
+#endif /* FILE_DUMP_ENABLE */
+
+    IV_COLOR_FORMAT_T mIvVideoColorFormat;
+
+    IV_PROFILE_T mAVCEncProfile;
+    WORD32   mAVCEncLevel;
+    bool     mStarted;
+    bool     mSpsPpsHeaderReceived;
+
+    bool     mSawInputEOS;
+    bool     mSawOutputEOS;
+    bool     mSignalledError;
+    bool     mIntra4x4;
+    bool     mEnableFastSad;
+    bool     mEnableAltRef;
+    bool     mReconEnable;
+    bool     mPSNREnable;
+    bool     mEntropyMode;
+    bool     mConstrainedIntraFlag;
+    IVE_SPEED_CONFIG     mEncSpeed;
+
+    iv_obj_t *mCodecCtx;         // Codec context
+    iv_mem_rec_t *mMemRecords;   // Memory records requested by the codec
+    size_t mNumMemRecords;       // Number of memory records requested by codec
+    size_t mNumCores;            // Number of cores used by the codec
+
+    uint32_t mWidth;
+    uint32_t mHeight;
+    uint32_t mFramerate;
+    uint32_t mBitrate;
+    uint32_t mOutBufferSize;
+    UWORD32 mHeaderGenerated;
+    UWORD32 mBframes;
+    IV_ARCH_T mArch;
+    IVE_SLICE_MODE_T mSliceMode;
+    UWORD32 mSliceParam;
+    bool mHalfPelEnable;
+    UWORD32 mIInterval;
+    UWORD32 mIDRInterval;
+    UWORD32 mDisableDeblkLevel;
+    IVE_AIR_MODE_T mAIRMode;
+    UWORD32 mAIRRefreshPeriod;
+    std::map<const void *, std::shared_ptr<C2Buffer>> mBuffers;
+    std::list<std::unique_ptr<uint8_t[]>> mFreeConversionBuffers;
+    std::list<std::unique_ptr<uint8_t[]>> mConversionBuffersInUse;
+
+    void initEncParams();
+    c2_status_t initEncoder();
+    c2_status_t releaseEncoder();
+
+    c2_status_t setFrameType(IV_PICTURE_CODING_TYPE_T  e_frame_type);
+    c2_status_t setQp();
+    c2_status_t setEncMode(IVE_ENC_MODE_T e_enc_mode);
+    c2_status_t setDimensions();
+    c2_status_t setNumCores();
+    c2_status_t setFrameRate();
+    c2_status_t setIpeParams();
+    c2_status_t setBitRate();
+    c2_status_t setAirParams();
+    c2_status_t setMeParams();
+    c2_status_t setGopParams();
+    c2_status_t setProfileParams();
+    c2_status_t setDeblockParams();
+    c2_status_t setVbvParams();
+    void logVersion();
+    c2_status_t setEncodeArgs(
+            ive_video_encode_ip_t *ps_encode_ip,
+            ive_video_encode_op_t *ps_encode_op,
+            const C2GraphicView *const input,
+            uint8_t *base,
+            uint32_t capacity,
+            uint64_t timestamp);
+
+    DISALLOW_EVIL_CONSTRUCTORS(C2SoftAvcEnc);
+};
+
+#ifdef FILE_DUMP_ENABLE
+
+#define INPUT_DUMP_PATH     "/sdcard/media/avce_input"
+#define INPUT_DUMP_EXT      "yuv"
+#define OUTPUT_DUMP_PATH    "/sdcard/media/avce_output"
+#define OUTPUT_DUMP_EXT     "h264"
+
+#define GENERATE_FILE_NAMES() {                         \
+    GETTIME(&mTimeStart, NULL);                         \
+    strcpy(mInFile, "");                                \
+    sprintf(mInFile, "%s_%ld.%ld.%s", INPUT_DUMP_PATH,  \
+            mTimeStart.tv_sec, mTimeStart.tv_usec,      \
+            INPUT_DUMP_EXT);                            \
+    strcpy(mOutFile, "");                               \
+    sprintf(mOutFile, "%s_%ld.%ld.%s", OUTPUT_DUMP_PATH,\
+            mTimeStart.tv_sec, mTimeStart.tv_usec,      \
+            OUTPUT_DUMP_EXT);                           \
+}
+
+#define CREATE_DUMP_FILE(m_filename) {                  \
+    FILE *fp = fopen(m_filename, "wb");                 \
+    if (fp != NULL) {                                   \
+        ALOGD("Opened file %s", m_filename);            \
+        fclose(fp);                                     \
+    } else {                                            \
+        ALOGD("Could not open file %s", m_filename);    \
+    }                                                   \
+}
+#define DUMP_TO_FILE(m_filename, m_buf, m_size)         \
+{                                                       \
+    FILE *fp = fopen(m_filename, "ab");                 \
+    if (fp != NULL && m_buf != NULL) {                  \
+        int i;                                          \
+        i = fwrite(m_buf, 1, m_size, fp);               \
+        ALOGD("fwrite ret %d to write %d", i, m_size);  \
+        if (i != (int)m_size) {                         \
+            ALOGD("Error in fwrite, returned %d", i);   \
+            perror("Error in write to file");           \
+        }                                               \
+        fclose(fp);                                     \
+    } else {                                            \
+        ALOGD("Could not write to file %s", m_filename);\
+        if (fp != NULL)                                 \
+            fclose(fp);                                 \
+    }                                                   \
+}
+#else /* FILE_DUMP_ENABLE */
+#define INPUT_DUMP_PATH
+#define INPUT_DUMP_EXT
+#define OUTPUT_DUMP_PATH
+#define OUTPUT_DUMP_EXT
+#define GENERATE_FILE_NAMES()
+#define CREATE_DUMP_FILE(m_filename)
+#define DUMP_TO_FILE(m_filename, m_buf, m_size)
+#endif /* FILE_DUMP_ENABLE */
+
+}  // namespace android
+
+#endif  // C2_SOFT_AVC_ENC_H__
diff --git a/media/libstagefright/colorconversion/ColorConverter.cpp b/media/libstagefright/colorconversion/ColorConverter.cpp
index c7f9001..eae73fc 100644
--- a/media/libstagefright/colorconversion/ColorConverter.cpp
+++ b/media/libstagefright/colorconversion/ColorConverter.cpp
@@ -64,7 +64,7 @@
                     || mDstFormat == OMX_COLOR_Format32bitBGRA8888;
 
         case OMX_COLOR_FormatYUV420Planar16:
-            return mDstFormat == OMX_COLOR_Format32BitRGBA1010102;
+            return mDstFormat == OMX_COLOR_FormatYUV444Y410;
 
         case OMX_COLOR_FormatCbYCrY:
         case OMX_QCOM_COLOR_FormatYVU420SemiPlanar:
@@ -77,6 +77,12 @@
     }
 }
 
+bool ColorConverter::isDstRGB() const {
+    return mDstFormat == OMX_COLOR_Format16bitRGB565
+            || mDstFormat == OMX_COLOR_Format32BitRGBA8888
+            || mDstFormat == OMX_COLOR_Format32bitBGRA8888;
+}
+
 ColorConverter::BitmapParams::BitmapParams(
         void *bits,
         size_t width, size_t height,
@@ -99,7 +105,7 @@
 
     case OMX_COLOR_Format32bitBGRA8888:
     case OMX_COLOR_Format32BitRGBA8888:
-    case OMX_COLOR_Format32BitRGBA1010102:
+    case OMX_COLOR_FormatYUV444Y410:
         mBpp = 4;
         mStride = 4 * mWidth;
         break;
diff --git a/media/libstagefright/colorconversion/SoftwareRenderer.cpp b/media/libstagefright/colorconversion/SoftwareRenderer.cpp
index fca9c09..c9ebbdc 100644
--- a/media/libstagefright/colorconversion/SoftwareRenderer.cpp
+++ b/media/libstagefright/colorconversion/SoftwareRenderer.cpp
@@ -134,6 +134,10 @@
             }
             case OMX_COLOR_FormatYUV420Planar16:
             {
+                // Here we would convert OMX_COLOR_FormatYUV420Planar16 into
+                // OMX_COLOR_FormatYUV444Y410, and put it inside a buffer with
+                // format HAL_PIXEL_FORMAT_RGBA_1010102. Surfaceflinger will
+                // use render engine to convert it to RGB if needed.
                 halFormat = HAL_PIXEL_FORMAT_RGBA_1010102;
                 bufWidth = (mCropWidth + 1) & ~1;
                 bufHeight = (mCropHeight + 1) & ~1;
@@ -152,7 +156,7 @@
         CHECK(mConverter->isValid());
     } else if (mColorFormat == OMX_COLOR_FormatYUV420Planar16) {
         mConverter = new ColorConverter(
-                mColorFormat, OMX_COLOR_Format32BitRGBA1010102);
+                mColorFormat, OMX_COLOR_FormatYUV444Y410);
         CHECK(mConverter->isValid());
     }
 
@@ -380,7 +384,7 @@
     if (format->findInt32("android._dataspace", (int32_t *)&dataSpace) && dataSpace != mDataSpace) {
         mDataSpace = dataSpace;
 
-        if (mConverter != NULL) {
+        if (mConverter != NULL && mConverter->isDstRGB()) {
             // graphics only supports full range RGB. ColorConverter should have
             // converted any YUV to full range.
             dataSpace = (android_dataspace)
diff --git a/media/libstagefright/foundation/include/media/stagefright/foundation/ByteUtils.h b/media/libstagefright/foundation/include/media/stagefright/foundation/ByteUtils.h
index dc4125f..a434f81 100644
--- a/media/libstagefright/foundation/include/media/stagefright/foundation/ByteUtils.h
+++ b/media/libstagefright/foundation/include/media/stagefright/foundation/ByteUtils.h
@@ -22,8 +22,20 @@
 
 namespace android {
 
-#define FOURCC(c1, c2, c3, c4) \
-    ((c1) << 24 | (c2) << 16 | (c3) << 8 | (c4))
+constexpr int FOURCC(unsigned char c1, unsigned char c2, unsigned char c3, unsigned char c4) {
+    return ((c1) << 24 | (c2) << 16 | (c3) << 8 | (c4));
+}
+
+template <size_t N>
+constexpr int32_t FOURCC(const char (&s) [N]) {
+    static_assert(N == 5, "fourcc: wrong length");
+    return
+            (unsigned char) s[0] << 24 |
+            (unsigned char) s[1] << 16 |
+            (unsigned char) s[2] << 8 |
+            (unsigned char) s[3] << 0;
+}
+
 
 uint16_t U16_AT(const uint8_t *ptr);
 uint32_t U32_AT(const uint8_t *ptr);
diff --git a/media/libstagefright/include/CCodecBufferChannel.h b/media/libstagefright/include/CCodecBufferChannel.h
index c5062d6..57a1374 100644
--- a/media/libstagefright/include/CCodecBufferChannel.h
+++ b/media/libstagefright/include/CCodecBufferChannel.h
@@ -27,6 +27,7 @@
 #include <C2Component.h>
 
 #include <media/stagefright/foundation/Mutexed.h>
+#include <media/stagefright/gbs/GraphicBufferSource.h>
 #include <media/stagefright/CodecBase.h>
 #include <media/ICrypto.h>
 
@@ -35,134 +36,9 @@
 /**
  * BufferChannelBase implementation for CCodec.
  */
-class CCodecBufferChannel : public BufferChannelBase {
+class CCodecBufferChannel
+    : public BufferChannelBase, public std::enable_shared_from_this<CCodecBufferChannel> {
 public:
-    /**
-     * Base class for representation of buffers at one port.
-     */
-    class Buffers {
-    public:
-        Buffers() = default;
-        virtual ~Buffers() = default;
-
-        /**
-         * Set format for MediaCodec-facing buffers.
-         */
-        inline void setFormat(const sp<AMessage> &format) { mFormat = format; }
-
-        /**
-         * Returns true if the buffers are operating under array mode.
-         */
-        virtual bool isArrayMode() { return false; }
-
-        /**
-         * Fills the vector with MediaCodecBuffer's if in array mode; otherwise,
-         * no-op.
-         */
-        virtual void getArray(Vector<sp<MediaCodecBuffer>> *) {}
-
-    protected:
-        // Format to be used for creating MediaCodec-facing buffers.
-        sp<AMessage> mFormat;
-
-    private:
-        DISALLOW_EVIL_CONSTRUCTORS(Buffers);
-    };
-
-    class InputBuffers : public Buffers {
-    public:
-        using Buffers::Buffers;
-        virtual ~InputBuffers() = default;
-
-        /**
-         * Set a block pool to obtain input memory blocks.
-         */
-        inline void setPool(const std::shared_ptr<C2BlockPool> &pool) { mPool = pool; }
-
-        /**
-         * Get a new MediaCodecBuffer for input and its corresponding index.
-         * Returns false if no new buffer can be obtained at the moment.
-         */
-        virtual bool requestNewBuffer(size_t *index, sp<MediaCodecBuffer> *buffer) = 0;
-
-        /**
-         * Release the buffer obtained from requestNewBuffer() and get the
-         * associated C2Buffer object back. Returns empty shared_ptr if the
-         * buffer is not on file.
-         */
-        virtual std::shared_ptr<C2Buffer> releaseBuffer(const sp<MediaCodecBuffer> &buffer) = 0;
-
-        /**
-         * Flush internal state. After this call, no index or buffer previously
-         * returned from requestNewBuffer() is valid.
-         */
-        virtual void flush() = 0;
-
-        /**
-         * Return array-backed version of input buffers. The returned object
-         * shall retain the internal state so that it will honor index and
-         * buffer from previous calls of requestNewBuffer().
-         */
-        virtual std::unique_ptr<InputBuffers> toArrayMode() = 0;
-
-    protected:
-        // Pool to obtain blocks for input buffers.
-        std::shared_ptr<C2BlockPool> mPool;
-
-    private:
-        DISALLOW_EVIL_CONSTRUCTORS(InputBuffers);
-    };
-
-    class OutputBuffers : public Buffers {
-    public:
-        using Buffers::Buffers;
-        virtual ~OutputBuffers() = default;
-
-        /**
-         * Register output C2Buffer from the component and obtain corresponding
-         * index and MediaCodecBuffer object. Returns false if registration
-         * fails.
-         */
-        virtual bool registerBuffer(
-                const std::shared_ptr<C2Buffer> &buffer,
-                size_t *index,
-                sp<MediaCodecBuffer> *codecBuffer) = 0;
-
-        /**
-         * Register codec specific data as a buffer to be consistent with
-         * MediaCodec behavior.
-         */
-        virtual bool registerCsd(
-                const C2StreamCsdInfo::output * /* csd */,
-                size_t * /* index */,
-                sp<MediaCodecBuffer> * /* codecBuffer */) {
-            return false;
-        }
-
-        /**
-         * Release the buffer obtained from registerBuffer() and get the
-         * associated C2Buffer object back. Returns empty shared_ptr if the
-         * buffer is not on file.
-         */
-        virtual std::shared_ptr<C2Buffer> releaseBuffer(const sp<MediaCodecBuffer> &buffer) = 0;
-
-        /**
-         * Flush internal state. After this call, no index or buffer previously
-         * returned from registerBuffer() is valid.
-         */
-        virtual void flush(const std::list<std::unique_ptr<C2Work>> &flushedWork) = 0;
-
-        /**
-         * Return array-backed version of output buffers. The returned object
-         * shall retain the internal state so that it will honor index and
-         * buffer from previous calls of registerBuffer().
-         */
-        virtual std::unique_ptr<OutputBuffers> toArrayMode() = 0;
-
-    private:
-        DISALLOW_EVIL_CONSTRUCTORS(OutputBuffers);
-    };
-
     CCodecBufferChannel(const std::function<void(status_t, enum ActionCode)> &onError);
     virtual ~CCodecBufferChannel();
 
@@ -186,23 +62,21 @@
 
     // Methods below are interface for CCodec to use.
 
+    /**
+     * Set the component object for buffer processing.
+     */
     void setComponent(const std::shared_ptr<C2Component> &component);
+
+    /**
+     * Set output graphic surface for rendering.
+     */
     status_t setSurface(const sp<Surface> &surface);
 
     /**
-     * Set C2BlockPool for input buffers.
-     *
-     * TODO: start timestamp?
+     * Set GraphicBufferSource object from which the component extracts input
+     * buffers.
      */
-    void setInputBufferAllocator(const sp<C2BlockPool> &inAlloc);
-
-    /**
-     * Set C2BlockPool for output buffers. This object shall never use the
-     * allocator itself; it's just passed
-     *
-     * TODO: start timestamp?
-     */
-    void setOutputBufferAllocator(const sp<C2BlockPool> &outAlloc);
+    status_t setGraphicBufferSource(const sp<GraphicBufferSource> &source);
 
     /**
      * Start queueing buffers to the component. This object should never queue
@@ -219,11 +93,17 @@
     void flush(const std::list<std::unique_ptr<C2Work>> &flushedWork);
 
     /**
-     * Notify MediaCodec about work done.
+     * Notify input client about work done.
      *
-     * @param workItems   finished work items.
+     * @param workItems   finished work item.
      */
-    void onWorkDone(std::vector<std::unique_ptr<C2Work>> workItems);
+    void onWorkDone(const std::unique_ptr<C2Work> &work);
+
+    // Internal classes
+    class Buffers;
+    class InputBuffers;
+    class OutputBuffers;
+    class InputBufferClient;
 
 private:
     class QueueGuard;
@@ -276,12 +156,17 @@
         bool mRunning;
     };
 
+    class C2ComponentWrapper;
+
+    void feedInputBufferIfAvailable();
+
     QueueSync mSync;
     sp<MemoryDealer> mDealer;
     sp<IMemory> mDecryptDestination;
     int32_t mHeapSeqNum;
 
     std::shared_ptr<C2Component> mComponent;
+    std::shared_ptr<InputBufferClient> mInputClient;
     std::function<void(status_t, enum ActionCode)> mOnError;
     std::shared_ptr<C2BlockPool> mInputAllocator;
     QueueSync mQueueSync;
diff --git a/media/libstagefright/include/media/stagefright/ACodec.h b/media/libstagefright/include/media/stagefright/ACodec.h
index 3196b10..fa22003 100644
--- a/media/libstagefright/include/media/stagefright/ACodec.h
+++ b/media/libstagefright/include/media/stagefright/ACodec.h
@@ -495,7 +495,7 @@
     status_t verifySupportForProfileAndLevel(int32_t profile, int32_t level);
 
     status_t configureBitrate(
-            int32_t bitrate, OMX_VIDEO_CONTROLRATETYPE bitrateMode);
+            OMX_VIDEO_CONTROLRATETYPE bitrateMode, int32_t bitrate, int32_t quality = 0);
     void configureEncoderLatency(const sp<AMessage> &msg);
 
     status_t setupErrorCorrectionParameters();
diff --git a/media/libstagefright/include/media/stagefright/CCodec.h b/media/libstagefright/include/media/stagefright/CCodec.h
index 3e24bbe..c689761 100644
--- a/media/libstagefright/include/media/stagefright/CCodec.h
+++ b/media/libstagefright/include/media/stagefright/CCodec.h
@@ -24,6 +24,7 @@
 #include <android/native_window.h>
 #include <media/hardware/MetadataBufferType.h>
 #include <media/stagefright/foundation/Mutexed.h>
+#include <media/stagefright/gbs/GraphicBufferSource.h>
 #include <media/stagefright/CodecBase.h>
 #include <media/stagefright/FrameRenderTracker.h>
 #include <media/stagefright/MediaDefs.h>
@@ -58,6 +59,7 @@
     virtual void signalRequestIDRFrame() override;
 
     void initiateReleaseIfStuck();
+    void onWorkDone(std::vector<std::unique_ptr<C2Work>> &workItems);
 
 protected:
     virtual ~CCodec();
@@ -77,6 +79,10 @@
     void flush();
     void release(bool sendCallback);
 
+    void createInputSurface();
+    void setInputSurface(const sp<PersistentSurface> &surface);
+    status_t setupInputSurface(const sp<GraphicBufferSource> &source);
+
     void setDeadline(const TimePoint &deadline);
 
     enum {
@@ -86,6 +92,9 @@
         kWhatFlush,
         kWhatStop,
         kWhatRelease,
+        kWhatCreateInputSurface,
+        kWhatSetInputSurface,
+        kWhatWorkDone,
     };
 
     enum {
@@ -104,14 +113,17 @@
 
     struct State {
         inline State() : mState(RELEASED) {}
+        inline int get() const { return mState; }
+        inline void set(int newState) { mState = newState; }
 
+        std::shared_ptr<C2Component> comp;
+    private:
         int mState;
-        std::shared_ptr<C2Component> mComp;
     };
 
     struct Formats {
-        sp<AMessage> mInputFormat;
-        sp<AMessage> mOutputFormat;
+        sp<AMessage> inputFormat;
+        sp<AMessage> outputFormat;
     };
 
     Mutexed<State> mState;
@@ -119,6 +131,7 @@
     std::shared_ptr<C2Component::Listener> mListener;
     Mutexed<TimePoint> mDeadline;
     Mutexed<Formats> mFormats;
+    Mutexed<std::list<std::unique_ptr<C2Work>>> mWorkDoneQueue;
 
     DISALLOW_EVIL_CONSTRUCTORS(CCodec);
 };
diff --git a/media/libstagefright/include/media/stagefright/ColorConverter.h b/media/libstagefright/include/media/stagefright/ColorConverter.h
index f6bd353..a6c8981 100644
--- a/media/libstagefright/include/media/stagefright/ColorConverter.h
+++ b/media/libstagefright/include/media/stagefright/ColorConverter.h
@@ -33,6 +33,8 @@
 
     bool isValid() const;
 
+    bool isDstRGB() const;
+
     status_t convert(
             const void *srcBits,
             size_t srcWidth, size_t srcHeight,
diff --git a/packages/MediaComponents/src/com/android/media/MediaBrowser2Impl.java b/packages/MediaComponents/src/com/android/media/MediaBrowser2Impl.java
index 59d8366..511eed1 100644
--- a/packages/MediaComponents/src/com/android/media/MediaBrowser2Impl.java
+++ b/packages/MediaComponents/src/com/android/media/MediaBrowser2Impl.java
@@ -21,7 +21,7 @@
 import android.media.MediaBrowser2;
 import android.media.MediaBrowser2.BrowserCallback;
 import android.media.MediaSession2.CommandButton;
-import android.media.SessionToken;
+import android.media.SessionToken2;
 import android.media.update.MediaBrowser2Provider;
 import android.os.Bundle;
 import android.os.RemoteException;
@@ -37,9 +37,9 @@
     private final MediaBrowser2 mInstance;
     private final MediaBrowser2.BrowserCallback mCallback;
 
-    public MediaBrowser2Impl(MediaBrowser2 instance, Context context, SessionToken token,
-            BrowserCallback callback, Executor executor) {
-        super(instance, context, token, callback, executor);
+    public MediaBrowser2Impl(Context context, MediaBrowser2 instance, SessionToken2 token,
+            Executor executor, BrowserCallback callback) {
+        super(context, instance, token, executor, callback);
         mInstance = instance;
         mCallback = callback;
     }
diff --git a/packages/MediaComponents/src/com/android/media/MediaController2Impl.java b/packages/MediaComponents/src/com/android/media/MediaController2Impl.java
index ac3f311..43f8473 100644
--- a/packages/MediaComponents/src/com/android/media/MediaController2Impl.java
+++ b/packages/MediaComponents/src/com/android/media/MediaController2Impl.java
@@ -31,17 +31,14 @@
 import android.media.MediaSession2.CommandGroup;
 import android.media.MediaController2;
 import android.media.MediaController2.ControllerCallback;
-import android.media.MediaPlayerBase;
-import android.media.MediaSession2.PlaylistParam;
+import android.media.MediaSession2.PlaylistParams;
 import android.media.MediaSessionService2;
 import android.media.PlaybackState2;
 import android.media.Rating2;
-import android.media.SessionToken;
-import android.media.session.PlaybackState;
+import android.media.SessionToken2;
 import android.media.update.MediaController2Provider;
 import android.net.Uri;
 import android.os.Bundle;
-import android.os.Handler;
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.os.ResultReceiver;
@@ -70,7 +67,7 @@
 
     private final Context mContext;
     private final MediaSession2CallbackStub mSessionCallbackStub;
-    private final SessionToken mToken;
+    private final SessionToken2 mToken;
     private final ControllerCallback mCallback;
     private final Executor mCallbackExecutor;
     private final IBinder.DeathRecipient mDeathRecipient;
@@ -92,8 +89,8 @@
 
     // TODO(jaewan): Require session activeness changed listener, because controller can be
     //               available when the session's player is null.
-    public MediaController2Impl(MediaController2 instance, Context context, SessionToken token,
-            ControllerCallback callback, Executor executor) {
+    public MediaController2Impl(Context context, MediaController2 instance, SessionToken2 token,
+            Executor executor, ControllerCallback callback) {
         mInstance = instance;
 
         if (context == null) {
@@ -213,7 +210,7 @@
     }
 
     @Override
-    public SessionToken getSessionToken_impl() {
+    public SessionToken2 getSessionToken_impl() {
         return mToken;
     }
 
@@ -384,7 +381,7 @@
     }
 
     @Override
-    public PlaylistParam getPlaylistParam_impl() {
+    public PlaylistParams getPlaylistParam_impl() {
         // TODO(jaewan): Implement
         return null;
     }
@@ -405,7 +402,7 @@
         }
     }
 
-    private void pushPlaybackStateChanges(final PlaybackState state) {
+    private void pushPlaybackStateChanges(final PlaybackState2 state) {
         synchronized (mLock) {
             for (int i = 0; i < mPlaybackListeners.size(); i++) {
                 mPlaybackListeners.get(i).postPlaybackChange(state);
@@ -500,9 +497,9 @@
         }
 
         @Override
-        public void onPlaybackStateChanged(PlaybackState state) throws RuntimeException {
+        public void onPlaybackStateChanged(Bundle state) throws RuntimeException {
             final MediaController2Impl controller = getController();
-            controller.pushPlaybackStateChanges(state);
+            controller.pushPlaybackStateChanges(PlaybackState2.fromBundle(state));
         }
 
         @Override
diff --git a/packages/MediaComponents/src/com/android/media/MediaLibraryService2Impl.java b/packages/MediaComponents/src/com/android/media/MediaLibraryService2Impl.java
index b177dda..bbb3411 100644
--- a/packages/MediaComponents/src/com/android/media/MediaLibraryService2Impl.java
+++ b/packages/MediaComponents/src/com/android/media/MediaLibraryService2Impl.java
@@ -31,6 +31,8 @@
 import android.media.update.MediaLibraryService2Provider;
 import android.os.Bundle;
 
+import java.util.concurrent.Executor;
+
 public class MediaLibraryService2Impl extends MediaSessionService2Impl implements
         MediaLibraryService2Provider {
     private final MediaSessionService2 mInstance;
@@ -65,12 +67,12 @@
         private final MediaLibrarySession mInstance;
         private final MediaLibrarySessionCallback mCallback;
 
-        public MediaLibrarySessionImpl(MediaLibrarySession instance, Context context,
-                MediaPlayerBase player, String id,
-                MediaLibrarySessionCallback callback, VolumeProvider volumeProvider, int ratingType,
-                PendingIntent sessionActivity) {
-            super(instance, context, player, id, callback, volumeProvider, ratingType,
-                    sessionActivity);
+        public MediaLibrarySessionImpl(Context context, MediaLibrarySession instance,
+                MediaPlayerBase player, String id, VolumeProvider volumeProvider, int ratingType,
+                PendingIntent sessionActivity, Executor callbackExecutor,
+                MediaLibrarySessionCallback callback)  {
+            super(context, instance, player, id, volumeProvider, ratingType, sessionActivity,
+                    callbackExecutor, callback);
             mInstance = instance;
             mCallback = callback;
         }
diff --git a/packages/MediaComponents/src/com/android/media/MediaSession2Impl.java b/packages/MediaComponents/src/com/android/media/MediaSession2Impl.java
index 2e71641..22a3187 100644
--- a/packages/MediaComponents/src/com/android/media/MediaSession2Impl.java
+++ b/packages/MediaComponents/src/com/android/media/MediaSession2Impl.java
@@ -31,12 +31,12 @@
 import android.media.MediaSession2.CommandButton;
 import android.media.MediaSession2.CommandGroup;
 import android.media.MediaSession2.ControllerInfo;
-import android.media.MediaSession2.PlaylistParam;
+import android.media.MediaSession2.PlaylistParams;
 import android.media.MediaSession2.SessionCallback;
-import android.media.SessionToken;
+import android.media.PlaybackState2;
+import android.media.SessionToken2;
 import android.media.VolumeProvider;
 import android.media.session.MediaSessionManager;
-import android.media.session.PlaybackState;
 import android.media.update.MediaSession2Provider;
 import android.os.Bundle;
 import android.os.Handler;
@@ -47,6 +47,7 @@
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.Executor;
 
 public class MediaSession2Impl implements MediaSession2Provider {
     private static final String TAG = "MediaSession2";
@@ -57,8 +58,9 @@
     private final Context mContext;
     private final String mId;
     private final Handler mHandler;
+    private final Executor mCallbackExecutor;
     private final MediaSession2Stub mSessionStub;
-    private final SessionToken mSessionToken;
+    private final SessionToken2 mSessionToken;
 
     private MediaPlayerBase mPlayer;
 
@@ -78,9 +80,9 @@
      * @param ratingType
      * @param sessionActivity
      */
-    public MediaSession2Impl(MediaSession2 instance, Context context, MediaPlayerBase player,
-            String id, SessionCallback callback, VolumeProvider volumeProvider, int ratingType,
-            PendingIntent sessionActivity) {
+    public MediaSession2Impl(Context context, MediaSession2 instance, MediaPlayerBase player,
+            String id, VolumeProvider volumeProvider, int ratingType, PendingIntent sessionActivity,
+            Executor callbackExecutor, SessionCallback callback) {
         mInstance = instance;
         // TODO(jaewan): Keep other params.
 
@@ -89,6 +91,7 @@
         mContext = context;
         mId = id;
         mHandler = new Handler(Looper.myLooper());
+        mCallbackExecutor = callbackExecutor;
         mSessionStub = new MediaSession2Stub(this, callback);
         // Ask server to create session token for following reasons.
         //   1. Make session ID unique per package.
@@ -128,13 +131,14 @@
             // Player didn't changed. No-op.
             return;
         }
-        mHandler.removeCallbacksAndMessages(null);
+        // TODO(jaewan): Find equivalent for the executor
+        //mHandler.removeCallbacksAndMessages(null);
         if (mPlayer != null && mListener != null) {
             // This might not work for a poorly implemented player.
             mPlayer.removePlaybackListener(mListener);
         }
         mListener = new MyPlaybackListener(this, player);
-        player.addPlaybackListener(mListener, mHandler);
+        player.addPlaybackListener(mCallbackExecutor, mListener);
         notifyPlaybackStateChanged(player.getPlaybackState());
         mPlayer = player;
     }
@@ -159,7 +163,7 @@
 
     // TODO(jaewan): Change this to @NonNull
     @Override
-    public SessionToken getToken_impl() {
+    public SessionToken2 getToken_impl() {
         return mSessionToken;
     }
 
@@ -255,7 +259,7 @@
     }
 
     @Override
-    public void setPlaylist_impl(List<MediaItem2> playlist, PlaylistParam param) {
+    public void setPlaylist_impl(List<MediaItem2> playlist, PlaylistParams param) {
         // TODO(jaewan): Implement
     }
 
@@ -300,13 +304,15 @@
     //               1. Allow calls from random threads for all methods.
     //               2. Allow calls from random threads for all methods, except for the
     //                  {@link #setPlayer()}.
-    // TODO(jaewan): Should we pend command instead of exception?
     private void ensureCallingThread() {
+        // TODO(jaewan): Uncomment or remove
+        /*
         if (mHandler.getLooper() != Looper.myLooper()) {
             throw new IllegalStateException("Run this on the given thread");
-        }
+        }*/
     }
 
+
     private void ensurePlayer() {
         // TODO(jaewan): Should we pend command instead? Follow the decision from MP2.
         //               Alternatively we can add a API like setAcceptsPendingCommands(boolean).
@@ -319,7 +325,7 @@
         return mHandler;
     }
 
-    private void notifyPlaybackStateChanged(PlaybackState state) {
+    private void notifyPlaybackStateChanged(PlaybackState2 state) {
         // Notify to listeners added directly to this session
         for (int i = 0; i < mListeners.size(); i++) {
             mListeners.get(i).postPlaybackChange(state);
@@ -350,10 +356,9 @@
         }
 
         @Override
-        public void onPlaybackChanged(PlaybackState state) {
+        public void onPlaybackChanged(PlaybackState2 state) {
             MediaSession2Impl session = mSession.get();
-            if (session == null || session.getHandler().getLooper() != Looper.myLooper()
-                    || mPlayer != session.mInstance.getPlayer()) {
+            if (mPlayer != session.mInstance.getPlayer()) {
                 Log.w(TAG, "Unexpected playback state change notifications. Ignoring.",
                         new IllegalStateException());
                 return;
@@ -374,7 +379,7 @@
         // {@link #CALLBACK_FLAG_SESSION_ACTIVENESS}
         private int mFlag;
 
-        public ControllerInfoImpl(ControllerInfo instance, Context context, int uid,
+        public ControllerInfoImpl(Context context, ControllerInfo instance, int uid,
                 int pid, String packageName, IMediaSession2Callback callback) {
             mInstance = instance;
             mUid = uid;
diff --git a/packages/MediaComponents/src/com/android/media/MediaSession2Stub.java b/packages/MediaComponents/src/com/android/media/MediaSession2Stub.java
index 3f7a1b1..2f75dfa 100644
--- a/packages/MediaComponents/src/com/android/media/MediaSession2Stub.java
+++ b/packages/MediaComponents/src/com/android/media/MediaSession2Stub.java
@@ -29,6 +29,7 @@
 import android.media.MediaSession2.CommandGroup;
 import android.media.MediaSession2.ControllerInfo;
 import android.media.MediaSession2.SessionCallback;
+import android.media.PlaybackState2;
 import android.media.session.PlaybackState;
 import android.os.Binder;
 import android.os.Bundle;
@@ -152,10 +153,10 @@
 
     @Deprecated
     @Override
-    public PlaybackState getPlaybackState() throws RemoteException {
+    public Bundle getPlaybackState() throws RemoteException {
         MediaSession2Impl session = getSession();
         // TODO(jaewan): Check if mPlayer.getPlaybackState() is safe here.
-        return session.getInstance().getPlayer().getPlaybackState();
+        return session.getInstance().getPlayer().getPlaybackState().toBundle();
     }
 
     @Deprecated
@@ -216,13 +217,13 @@
     }
 
     // Should be used without a lock to prevent potential deadlock.
-    public void notifyPlaybackStateChangedNotLocked(PlaybackState state) {
+    public void notifyPlaybackStateChangedNotLocked(PlaybackState2 state) {
         final List<ControllerInfo> list = getControllersWithFlag(CALLBACK_FLAG_PLAYBACK);
         for (int i = 0; i < list.size(); i++) {
             IMediaSession2Callback callbackBinder =
                     ControllerInfoImpl.from(list.get(i)).getControllerBinder();
             try {
-                callbackBinder.onPlaybackStateChanged(state);
+                callbackBinder.onPlaybackStateChanged(state.toBundle());
             } catch (RemoteException e) {
                 Log.w(TAG, "Controller is gone", e);
                 // TODO(jaewan): What to do when the controller is gone?
diff --git a/packages/MediaComponents/src/com/android/media/MediaSessionService2Impl.java b/packages/MediaComponents/src/com/android/media/MediaSessionService2Impl.java
index 773a06f..9d24082 100644
--- a/packages/MediaComponents/src/com/android/media/MediaSessionService2Impl.java
+++ b/packages/MediaComponents/src/com/android/media/MediaSessionService2Impl.java
@@ -26,6 +26,7 @@
 import android.media.MediaSession2;
 import android.media.MediaSessionService2;
 import android.media.MediaSessionService2.MediaNotification;
+import android.media.PlaybackState2;
 import android.media.session.PlaybackState;
 import android.media.update.MediaSessionService2Provider;
 import android.os.IBinder;
@@ -70,7 +71,7 @@
     }
 
     @Override
-    public MediaNotification onUpdateNotification_impl(PlaybackState state) {
+    public MediaNotification onUpdateNotification_impl(PlaybackState2 state) {
         // Provide default notification UI later.
         return null;
     }
@@ -118,7 +119,7 @@
         return null;
     }
 
-    private void updateNotification(PlaybackState state) {
+    private void updateNotification(PlaybackState2 state) {
         MediaNotification mediaNotification = mInstance.onUpdateNotification(state);
         if (mediaNotification == null) {
             return;
@@ -145,7 +146,7 @@
 
     private class SessionServicePlaybackListener implements PlaybackListener {
         @Override
-        public void onPlaybackChanged(PlaybackState state) {
+        public void onPlaybackChanged(PlaybackState2 state) {
             if (state == null) {
                 Log.w(TAG, "Ignoring null playback state");
                 return;
diff --git a/packages/MediaComponents/src/com/android/media/PlaybackListenerHolder.java b/packages/MediaComponents/src/com/android/media/PlaybackListenerHolder.java
index 4d06463..7b336c4 100644
--- a/packages/MediaComponents/src/com/android/media/PlaybackListenerHolder.java
+++ b/packages/MediaComponents/src/com/android/media/PlaybackListenerHolder.java
@@ -16,39 +16,30 @@
 
 package com.android.media;
 
-import android.media.MediaPlayerBase;
 import android.media.MediaPlayerBase.PlaybackListener;
+import android.media.PlaybackState2;
 import android.media.session.PlaybackState;
 import android.os.Handler;
 import android.os.Message;
 import android.support.annotation.NonNull;
+
 import java.util.List;
+import java.util.concurrent.Executor;
 
 /**
- * Holds {@link android.media.MediaPlayerBase.PlaybackListener} with the {@link Handler}.
+ * Holds {@link PlaybackListener} with the {@link Handler}.
  */
-public class PlaybackListenerHolder extends Handler {
-    private static final int ON_PLAYBACK_CHANGED = 1;
+public class PlaybackListenerHolder {
+    public final Executor executor;
+    public final PlaybackListener listener;
 
-    public final MediaPlayerBase.PlaybackListener listener;
-
-    public PlaybackListenerHolder(
-            @NonNull MediaPlayerBase.PlaybackListener listener, @NonNull Handler handler) {
-        super(handler.getLooper());
+    public PlaybackListenerHolder(Executor executor, @NonNull PlaybackListener listener) {
+        this.executor = executor;
         this.listener = listener;
     }
 
-    @Override
-    public void handleMessage(Message msg) {
-        switch (msg.what) {
-            case ON_PLAYBACK_CHANGED:
-                listener.onPlaybackChanged((PlaybackState) msg.obj);
-                break;
-        }
-    }
-
-    public void postPlaybackChange(PlaybackState state) {
-        obtainMessage(ON_PLAYBACK_CHANGED, state).sendToTarget();
+    public void postPlaybackChange(final PlaybackState2 state) {
+        executor.execute(() -> listener.onPlaybackChanged(state));
     }
 
     /**
diff --git a/packages/MediaComponents/src/com/android/media/update/ApiFactory.java b/packages/MediaComponents/src/com/android/media/update/ApiFactory.java
index 43acaf9..8ce7bef 100644
--- a/packages/MediaComponents/src/com/android/media/update/ApiFactory.java
+++ b/packages/MediaComponents/src/com/android/media/update/ApiFactory.java
@@ -23,6 +23,7 @@
 import android.media.MediaBrowser2;
 import android.media.MediaBrowser2.BrowserCallback;
 import android.media.MediaController2;
+import android.media.MediaController2.ControllerCallback;
 import android.media.MediaLibraryService2;
 import android.media.MediaLibraryService2.MediaLibrarySession;
 import android.media.MediaLibraryService2.MediaLibrarySessionCallback;
@@ -32,7 +33,7 @@
 import android.media.MediaSession2.SessionCallback;
 import android.media.MediaSessionService2;
 import android.media.IMediaSession2Callback;
-import android.media.SessionToken;
+import android.media.SessionToken2;
 import android.media.VolumeProvider;
 import android.media.update.MediaBrowser2Provider;
 import android.media.update.MediaControlView2Provider;
@@ -43,6 +44,7 @@
 import android.media.update.VideoView2Provider;
 import android.media.update.StaticProvider;
 import android.media.update.ViewProvider;
+import android.os.IInterface;
 import android.support.annotation.Nullable;
 import android.util.AttributeSet;
 import android.widget.MediaControlView2;
@@ -68,32 +70,32 @@
 
     @Override
     public MediaController2Provider createMediaController2(
-            MediaController2 instance, Context context, SessionToken token,
-            MediaController2.ControllerCallback callback, Executor executor) {
-        return new MediaController2Impl(instance, context, token, callback, executor);
+            Context context, MediaController2 instance, SessionToken2 token,
+            Executor executor, ControllerCallback callback) {
+        return new MediaController2Impl(context, instance, token, executor, callback);
     }
 
     @Override
-    public MediaBrowser2Provider createMediaBrowser2(MediaBrowser2 instance, Context context,
-            SessionToken token, BrowserCallback callback, Executor executor) {
-        return new MediaBrowser2Impl(instance, context, token, callback, executor);
+    public MediaBrowser2Provider createMediaBrowser2(Context context, MediaBrowser2 instance,
+            SessionToken2 token, Executor executor, BrowserCallback callback) {
+        return new MediaBrowser2Impl(context, instance, token, executor, callback);
     }
 
     @Override
-    public MediaSession2Provider createMediaSession2(MediaSession2 instance, Context context,
-            MediaPlayerBase player, String id, SessionCallback callback,
-            VolumeProvider volumeProvider, int ratingType,
-            PendingIntent sessionActivity) {
-        return new MediaSession2Impl(instance, context, player, id, callback,
-                volumeProvider, ratingType, sessionActivity);
+    public MediaSession2Provider createMediaSession2(Context context, MediaSession2 instance,
+            MediaPlayerBase player, String id, VolumeProvider volumeProvider,
+            int ratingType, PendingIntent sessionActivity, Executor callbackExecutor,
+            SessionCallback callback) {
+        return new MediaSession2Impl(context, instance, player, id, volumeProvider, ratingType,
+                sessionActivity, callbackExecutor, callback);
     }
 
     @Override
     public MediaSession2Provider.ControllerInfoProvider createMediaSession2ControllerInfoProvider(
-            ControllerInfo instance, Context context, int uid, int pid, String packageName,
-            IMediaSession2Callback callback) {
-        return new MediaSession2Impl.ControllerInfoImpl(
-                instance, context, uid, pid, packageName, callback);
+            Context context, ControllerInfo instance, int uid, int pid, String packageName,
+            IInterface callback) {
+        return new MediaSession2Impl.ControllerInfoImpl(context,
+                instance, uid, pid, packageName, (IMediaSession2Callback) callback);
     }
 
     @Override
@@ -110,11 +112,11 @@
 
     @Override
     public MediaLibrarySessionProvider createMediaLibraryService2MediaLibrarySession(
-            MediaLibrarySession instance, Context context, MediaPlayerBase player, String id,
-            MediaLibrarySessionCallback callback, VolumeProvider volumeProvider, int ratingType,
-            PendingIntent sessionActivity) {
-        return new MediaLibrarySessionImpl(instance, context, player, id, callback, volumeProvider,
-                ratingType, sessionActivity);
+            Context context, MediaLibrarySession instance, MediaPlayerBase player,
+            String id, VolumeProvider volumeProvider, int ratingType, PendingIntent sessionActivity,
+            Executor callbackExecutor, MediaLibrarySessionCallback callback) {
+        return new MediaLibrarySessionImpl(context, instance, player, id, volumeProvider,
+                ratingType, sessionActivity, callbackExecutor, callback);
     }
 
     @Override
diff --git a/packages/MediaComponents/test/src/android/media/MediaBrowser2Test.java b/packages/MediaComponents/test/src/android/media/MediaBrowser2Test.java
index fe8aeb9..ef75060 100644
--- a/packages/MediaComponents/test/src/android/media/MediaBrowser2Test.java
+++ b/packages/MediaComponents/test/src/android/media/MediaBrowser2Test.java
@@ -48,7 +48,7 @@
     private static final String TAG = "MediaBrowser2Test";
 
     @Override
-    TestControllerInterface onCreateController(@NonNull SessionToken token,
+    TestControllerInterface onCreateController(@NonNull SessionToken2 token,
             @NonNull TestControllerCallbackInterface callback) {
         return new TestMediaBrowser(mContext, token, new TestBrowserCallback(callback));
     }
@@ -69,7 +69,7 @@
             }
         };
 
-        final SessionToken token = MockMediaLibraryService2.getToken(mContext);
+        final SessionToken2 token = MockMediaLibraryService2.getToken(mContext);
         MediaBrowser2 browser =
                 (MediaBrowser2) createController(token,true, callback);
         browser.getBrowserRoot(param);
@@ -127,9 +127,9 @@
     public class TestMediaBrowser extends MediaBrowser2 implements TestControllerInterface {
         private final BrowserCallback mCallback;
 
-        public TestMediaBrowser(@NonNull Context context, @NonNull SessionToken token,
+        public TestMediaBrowser(@NonNull Context context, @NonNull SessionToken2 token,
                 @NonNull ControllerCallback callback) {
-            super(context, token, (BrowserCallback) callback, sHandlerExecutor);
+            super(context, token, sHandlerExecutor, (BrowserCallback) callback);
             mCallback = (BrowserCallback) callback;
         }
 
diff --git a/packages/MediaComponents/test/src/android/media/MediaController2Test.java b/packages/MediaComponents/test/src/android/media/MediaController2Test.java
index f99935a..ae67a95 100644
--- a/packages/MediaComponents/test/src/android/media/MediaController2Test.java
+++ b/packages/MediaComponents/test/src/android/media/MediaController2Test.java
@@ -218,7 +218,7 @@
         sHandler.postAndSync(() -> {
             mSession.close();
             mSession = new MediaSession2.Builder(mContext, mPlayer)
-                    .setSessionCallback(sessionCallback).build();
+                    .setSessionCallback(sHandlerExecutor, sessionCallback).build();
         });
         MediaController2 controller =
                 createController(mSession.getToken(), false, null);
@@ -279,7 +279,7 @@
             });
             final MediaController2 controller = createController(mSession.getToken());
             testHandler.post(() -> {
-                final PlaybackState state = createPlaybackState(PlaybackState.STATE_ERROR);
+                final PlaybackState2 state = createPlaybackState(PlaybackState.STATE_ERROR);
                 for (int i = 0; i < 100; i++) {
                     // triggers call from session to controller.
                     player.notifyPlaybackState(state);
@@ -320,15 +320,15 @@
     @Ignore
     @Test
     public void testGetServiceToken() {
-        SessionToken token = TestUtils.getServiceToken(mContext, MockMediaSessionService2.ID);
+        SessionToken2 token = TestUtils.getServiceToken(mContext, MockMediaSessionService2.ID);
         assertNotNull(token);
         assertEquals(mContext.getPackageName(), token.getPackageName());
         assertEquals(MockMediaSessionService2.ID, token.getId());
         assertNull(token.getSessionBinder());
-        assertEquals(SessionToken.TYPE_SESSION_SERVICE, token.getType());
+        assertEquals(SessionToken2.TYPE_SESSION_SERVICE, token.getType());
     }
 
-    private void connectToService(SessionToken token) throws InterruptedException {
+    private void connectToService(SessionToken2 token) throws InterruptedException {
         mController = createController(token);
         mSession = TestServiceRegistry.getInstance().getServiceInstance().getSession();
         mPlayer = (MockPlayer) mSession.getPlayer();
diff --git a/packages/MediaComponents/test/src/android/media/MediaSession2Test.java b/packages/MediaComponents/test/src/android/media/MediaSession2Test.java
index 7b58f0e..045dcd5 100644
--- a/packages/MediaComponents/test/src/android/media/MediaSession2Test.java
+++ b/packages/MediaComponents/test/src/android/media/MediaSession2Test.java
@@ -208,7 +208,7 @@
             mSession.close();
             mPlayer = new MockPlayer(1);
             mSession = new MediaSession2.Builder(mContext, mPlayer)
-                    .setSessionCallback(callback).build();
+                    .setSessionCallback(sHandlerExecutor, callback).build();
         });
         MediaController2 controller = createController(mSession.getToken());
         controller.pause();
@@ -232,7 +232,7 @@
         sHandler.postAndSync(() -> {
             mSession.close();
             mSession = new MediaSession2.Builder(mContext, mPlayer)
-                    .setSessionCallback(sessionCallback).build();
+                    .setSessionCallback(sHandlerExecutor, sessionCallback).build();
         });
         MediaController2 controller =
                 createController(mSession.getToken(), false, null);
diff --git a/packages/MediaComponents/test/src/android/media/MediaSession2TestBase.java b/packages/MediaComponents/test/src/android/media/MediaSession2TestBase.java
index 2965c82..7834a42 100644
--- a/packages/MediaComponents/test/src/android/media/MediaSession2TestBase.java
+++ b/packages/MediaComponents/test/src/android/media/MediaSession2TestBase.java
@@ -101,11 +101,11 @@
         }
     }
 
-    final MediaController2 createController(SessionToken token) throws InterruptedException {
+    final MediaController2 createController(SessionToken2 token) throws InterruptedException {
         return createController(token, true, null);
     }
 
-    final MediaController2 createController(@NonNull SessionToken token,
+    final MediaController2 createController(@NonNull SessionToken2 token,
             boolean waitForConnect, @Nullable TestControllerCallbackInterface callback)
             throws InterruptedException {
         TestControllerInterface instance = onCreateController(token, callback);
@@ -145,7 +145,7 @@
         getWaitForConnectionInterface(controller).waitForDisconnect(expected);
     }
 
-    TestControllerInterface onCreateController(@NonNull SessionToken token,
+    TestControllerInterface onCreateController(@NonNull SessionToken2 token,
             @NonNull TestControllerCallbackInterface callback) {
         return new TestMediaController(mContext, token, new TestControllerCallback(callback));
     }
@@ -196,9 +196,9 @@
     public class TestMediaController extends MediaController2 implements TestControllerInterface {
         private final ControllerCallback mCallback;
 
-        public TestMediaController(@NonNull Context context, @NonNull SessionToken token,
+        public TestMediaController(@NonNull Context context, @NonNull SessionToken2 token,
                 @NonNull ControllerCallback callback) {
-            super(context, token, callback, sHandlerExecutor);
+            super(context, token, sHandlerExecutor, callback);
             mCallback = callback;
         }
 
diff --git a/packages/MediaComponents/test/src/android/media/MediaSessionManager_MediaSession2.java b/packages/MediaComponents/test/src/android/media/MediaSessionManager_MediaSession2.java
index bfed7d0..192cbc2 100644
--- a/packages/MediaComponents/test/src/android/media/MediaSessionManager_MediaSession2.java
+++ b/packages/MediaComponents/test/src/android/media/MediaSessionManager_MediaSession2.java
@@ -82,10 +82,10 @@
         player.notifyPlaybackState(createPlaybackState(PlaybackState.STATE_STOPPED));
 
         MediaController2 controller = null;
-        List<SessionToken> tokens = mManager.getActiveSessionTokens();
+        List<SessionToken2> tokens = mManager.getActiveSessionTokens();
         assertNotNull(tokens);
         for (int i = 0; i < tokens.size(); i++) {
-            SessionToken token = tokens.get(i);
+            SessionToken2 token = tokens.get(i);
             if (mContext.getPackageName().equals(token.getPackageName())
                     && TAG.equals(token.getId())) {
                 assertNotNull(token.getSessionBinder());
@@ -113,7 +113,7 @@
         sHandler.postAndSync(() -> {
             mSession.close();
             mSession = new MediaSession2.Builder(mContext, new MockPlayer(0)).setId(TAG)
-                    .setSessionCallback(new SessionCallback() {
+                    .setSessionCallback(sHandlerExecutor, new SessionCallback() {
                         @Override
                         public MediaSession2.CommandGroup onConnect(ControllerInfo controller) {
                             // Reject all connection request.
@@ -124,10 +124,10 @@
         ensureChangeInSession();
 
         boolean foundSession = false;
-        List<SessionToken> tokens = mManager.getActiveSessionTokens();
+        List<SessionToken2> tokens = mManager.getActiveSessionTokens();
         assertNotNull(tokens);
         for (int i = 0; i < tokens.size(); i++) {
-            SessionToken token = tokens.get(i);
+            SessionToken2 token = tokens.get(i);
             if (mContext.getPackageName().equals(token.getPackageName())
                     && TAG.equals(token.getId())) {
                 assertFalse(foundSession);
@@ -147,9 +147,9 @@
 
         // When the mSession's player becomes null, it should lose binder connection between server.
         // So server will forget the session.
-        List<SessionToken> tokens = mManager.getActiveSessionTokens();
+        List<SessionToken2> tokens = mManager.getActiveSessionTokens();
         for (int i = 0; i < tokens.size(); i++) {
-            SessionToken token = tokens.get(i);
+            SessionToken2 token = tokens.get(i);
             assertFalse(mContext.getPackageName().equals(token.getPackageName())
                     && TAG.equals(token.getId()));
         }
@@ -159,19 +159,19 @@
     public void testGetMediaSessionService2Token() throws InterruptedException {
         boolean foundTestSessionService = false;
         boolean foundTestLibraryService = false;
-        List<SessionToken> tokens = mManager.getSessionServiceTokens();
+        List<SessionToken2> tokens = mManager.getSessionServiceTokens();
         for (int i = 0; i < tokens.size(); i++) {
-            SessionToken token = tokens.get(i);
+            SessionToken2 token = tokens.get(i);
             if (mContext.getPackageName().equals(token.getPackageName())
                     && MockMediaSessionService2.ID.equals(token.getId())) {
                 assertFalse(foundTestSessionService);
-                assertEquals(SessionToken.TYPE_SESSION_SERVICE, token.getType());
+                assertEquals(SessionToken2.TYPE_SESSION_SERVICE, token.getType());
                 assertNull(token.getSessionBinder());
                 foundTestSessionService = true;
             } else if (mContext.getPackageName().equals(token.getPackageName())
                     && MockMediaLibraryService2.ID.equals(token.getId())) {
                 assertFalse(foundTestLibraryService);
-                assertEquals(SessionToken.TYPE_LIBRARY_SERVICE, token.getType());
+                assertEquals(SessionToken2.TYPE_LIBRARY_SERVICE, token.getType());
                 assertNull(token.getSessionBinder());
                 foundTestLibraryService = true;
             }
@@ -185,9 +185,9 @@
         boolean foundTestSession = false;
         boolean foundTestSessionService = false;
         boolean foundTestLibraryService = false;
-        List<SessionToken> tokens = mManager.getAllSessionTokens();
+        List<SessionToken2> tokens = mManager.getAllSessionTokens();
         for (int i = 0; i < tokens.size(); i++) {
-            SessionToken token = tokens.get(i);
+            SessionToken2 token = tokens.get(i);
             if (!mContext.getPackageName().equals(token.getPackageName())) {
                 continue;
             }
@@ -199,11 +199,11 @@
                 case MockMediaSessionService2.ID:
                     assertFalse(foundTestSessionService);
                     foundTestSessionService = true;
-                    assertEquals(SessionToken.TYPE_SESSION_SERVICE, token.getType());
+                    assertEquals(SessionToken2.TYPE_SESSION_SERVICE, token.getType());
                     break;
                 case MockMediaLibraryService2.ID:
                     assertFalse(foundTestLibraryService);
-                    assertEquals(SessionToken.TYPE_LIBRARY_SERVICE, token.getType());
+                    assertEquals(SessionToken2.TYPE_LIBRARY_SERVICE, token.getType());
                     foundTestLibraryService = true;
                     break;
                 default:
diff --git a/packages/MediaComponents/test/src/android/media/MockMediaLibraryService2.java b/packages/MediaComponents/test/src/android/media/MockMediaLibraryService2.java
index acf733f..14cf257 100644
--- a/packages/MediaComponents/test/src/android/media/MockMediaLibraryService2.java
+++ b/packages/MediaComponents/test/src/android/media/MockMediaLibraryService2.java
@@ -40,19 +40,19 @@
         EXTRA.putString(ROOT_ID, ROOT_ID);
     }
     @GuardedBy("MockMediaLibraryService2.class")
-    private static SessionToken sToken;
+    private static SessionToken2 sToken;
 
     private MediaLibrarySession mSession;
 
     @Override
     public MediaLibrarySession onCreateSession(String sessionId) {
         final MockPlayer player = new MockPlayer(1);
-        SyncHandler handler = (SyncHandler) TestServiceRegistry.getInstance().getHandler();
+        final SyncHandler handler = (SyncHandler) TestServiceRegistry.getInstance().getHandler();
         try {
             handler.postAndSync(() -> {
                 TestLibrarySessionCallback callback = new TestLibrarySessionCallback();
-                mSession = new MediaLibrarySessionBuilder(
-                        MockMediaLibraryService2.this, player, callback)
+                mSession = new MediaLibrarySessionBuilder(MockMediaLibraryService2.this,
+                        player, (runnable) -> handler.post(runnable), callback)
                         .setId(sessionId).build();
             });
         } catch (InterruptedException e) {
@@ -67,10 +67,10 @@
         super.onDestroy();
     }
 
-    public static SessionToken getToken(Context context) {
+    public static SessionToken2 getToken(Context context) {
         synchronized (MockMediaLibraryService2.class) {
             if (sToken == null) {
-                sToken = new SessionToken(SessionToken.TYPE_LIBRARY_SERVICE,
+                sToken = new SessionToken2(SessionToken2.TYPE_LIBRARY_SERVICE,
                         context.getPackageName(), ID,
                         MockMediaLibraryService2.class.getName(), null);
             }
diff --git a/packages/MediaComponents/test/src/android/media/MockMediaSessionService2.java b/packages/MediaComponents/test/src/android/media/MockMediaSessionService2.java
index 9cf4911..b058117 100644
--- a/packages/MediaComponents/test/src/android/media/MockMediaSessionService2.java
+++ b/packages/MediaComponents/test/src/android/media/MockMediaSessionService2.java
@@ -45,11 +45,12 @@
     @Override
     public MediaSession2 onCreateSession(String sessionId) {
         final MockPlayer player = new MockPlayer(1);
-        SyncHandler handler = (SyncHandler) TestServiceRegistry.getInstance().getHandler();
+        final SyncHandler handler = (SyncHandler) TestServiceRegistry.getInstance().getHandler();
         try {
             handler.postAndSync(() -> {
                 mSession = new MediaSession2.Builder(MockMediaSessionService2.this, player)
-                        .setId(sessionId).setSessionCallback(new MySessionCallback()).build();
+                        .setId(sessionId).setSessionCallback((runnable)->handler.post(runnable),
+                                new MySessionCallback()).build();
             });
         } catch (InterruptedException e) {
             fail(e.toString());
@@ -70,7 +71,7 @@
     }
 
     @Override
-    public MediaNotification onUpdateNotification(PlaybackState state) {
+    public MediaNotification onUpdateNotification(PlaybackState2 state) {
         if (mDefaultNotificationChannel == null) {
             mDefaultNotificationChannel = new NotificationChannel(
                     DEFAULT_MEDIA_NOTIFICATION_CHANNEL_ID,
diff --git a/packages/MediaComponents/test/src/android/media/MockPlayer.java b/packages/MediaComponents/test/src/android/media/MockPlayer.java
index b0d7a69..ad7ba2f 100644
--- a/packages/MediaComponents/test/src/android/media/MockPlayer.java
+++ b/packages/MediaComponents/test/src/android/media/MockPlayer.java
@@ -16,14 +16,14 @@
 
 package android.media;
 
-import android.media.session.PlaybackState;
-import android.os.Handler;
+import android.media.MediaSession2.PlaylistParams;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
 
 /**
  * A mock implementation of {@link MediaPlayerBase} for testing.
@@ -37,7 +37,7 @@
     public boolean mSkipToPreviousCalled;
     public boolean mSkipToNextCalled;
     public List<PlaybackListenerHolder> mListeners = new ArrayList<>();
-    private PlaybackState mLastPlaybackState;
+    private PlaybackState2 mLastPlaybackState;
 
     public MockPlayer(int count) {
         mCountDownLatch = (count > 0) ? new CountDownLatch(count) : null;
@@ -83,16 +83,18 @@
         }
     }
 
+
+
     @Nullable
     @Override
-    public PlaybackState getPlaybackState() {
+    public PlaybackState2 getPlaybackState() {
         return mLastPlaybackState;
     }
 
     @Override
-    public void addPlaybackListener(
-            @NonNull PlaybackListener listener, @NonNull Handler handler) {
-        mListeners.add(new PlaybackListenerHolder(listener, handler));
+    public void addPlaybackListener(@NonNull Executor executor,
+            @NonNull PlaybackListener listener) {
+        mListeners.add(new PlaybackListenerHolder(executor, listener));
     }
 
     @Override
@@ -103,10 +105,40 @@
         }
     }
 
-    public void notifyPlaybackState(final PlaybackState state) {
+    public void notifyPlaybackState(final PlaybackState2 state) {
         mLastPlaybackState = state;
         for (int i = 0; i < mListeners.size(); i++) {
             mListeners.get(i).postPlaybackChange(state);
         }
     }
+
+    // No-op. Should be added for test later.
+    @Override
+    public void prepare() {
+    }
+
+    @Override
+    public void seekTo(long pos) {
+    }
+
+    @Override
+    public void fastFoward() {
+    }
+
+    @Override
+    public void rewind() {
+    }
+
+    @Override
+    public AudioAttributes getAudioAttributes() {
+        return null;
+    }
+
+    @Override
+    public void setPlaylist(List<MediaItem2> item, PlaylistParams param) {
+    }
+
+    @Override
+    public void setCurrentPlaylistItem(int index) {
+    }
 }
diff --git a/packages/MediaComponents/test/src/android/media/PlaybackListenerHolder.java b/packages/MediaComponents/test/src/android/media/PlaybackListenerHolder.java
index b0b87de..4e19d4d 100644
--- a/packages/MediaComponents/test/src/android/media/PlaybackListenerHolder.java
+++ b/packages/MediaComponents/test/src/android/media/PlaybackListenerHolder.java
@@ -23,32 +23,22 @@
 import android.support.annotation.NonNull;
 
 import java.util.List;
+import java.util.concurrent.Executor;
 
 /**
  * Holds {@link PlaybackListener} with the {@link Handler}.
  */
-public class PlaybackListenerHolder extends Handler {
-    private static final int ON_PLAYBACK_CHANGED = 1;
-
+public class PlaybackListenerHolder {
+    public final Executor executor;
     public final PlaybackListener listener;
 
-    public PlaybackListenerHolder(
-            @NonNull PlaybackListener listener, @NonNull Handler handler) {
-        super(handler.getLooper());
+    public PlaybackListenerHolder(Executor executor, @NonNull PlaybackListener listener) {
+        this.executor = executor;
         this.listener = listener;
     }
 
-    @Override
-    public void handleMessage(Message msg) {
-        switch (msg.what) {
-            case ON_PLAYBACK_CHANGED:
-                listener.onPlaybackChanged((PlaybackState) msg.obj);
-                break;
-        }
-    }
-
-    public void postPlaybackChange(PlaybackState state) {
-        obtainMessage(ON_PLAYBACK_CHANGED, state).sendToTarget();
+    public void postPlaybackChange(final PlaybackState2 state) {
+        executor.execute(() -> listener.onPlaybackChanged(state));
     }
 
     /**
diff --git a/packages/MediaComponents/test/src/android/media/TestUtils.java b/packages/MediaComponents/test/src/android/media/TestUtils.java
index 1372f01..9a1fa10 100644
--- a/packages/MediaComponents/test/src/android/media/TestUtils.java
+++ b/packages/MediaComponents/test/src/android/media/TestUtils.java
@@ -45,8 +45,9 @@
      * @param state one of the PlaybackState.STATE_xxx.
      * @return a PlaybackState
      */
-    public static PlaybackState createPlaybackState(int state) {
-        return new PlaybackState.Builder().setState(state, 0, 1.0f).build();
+    public static PlaybackState2 createPlaybackState(int state) {
+        return new PlaybackState2(state, 0, 0, 1.0f,
+                0, 0, null);
     }
 
     /**
@@ -57,12 +58,12 @@
      * @return
      */
     // TODO(jaewan): Currently not working.
-    public static SessionToken getServiceToken(Context context, String id) {
+    public static SessionToken2 getServiceToken(Context context, String id) {
         MediaSessionManager manager =
                 (MediaSessionManager) context.getSystemService(Context.MEDIA_SESSION_SERVICE);
-        List<SessionToken> tokens = manager.getSessionServiceTokens();
+        List<SessionToken2> tokens = manager.getSessionServiceTokens();
         for (int i = 0; i < tokens.size(); i++) {
-            SessionToken token = tokens.get(i);
+            SessionToken2 token = tokens.get(i);
             if (context.getPackageName().equals(token.getPackageName())
                     && id.equals(token.getId())) {
                 return token;
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index e362530..113744f 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -321,6 +321,7 @@
                                               actualSessionId,
                                               client.clientPid,
                                               client.clientUid,
+                                              client.packageName,
                                               config,
                                               AUDIO_INPUT_FLAG_MMAP_NOIRQ, deviceId, &portId);
     }
@@ -340,7 +341,7 @@
         if (direction == MmapStreamInterface::DIRECTION_OUTPUT) {
             AudioSystem::releaseOutput(io, streamType, actualSessionId);
         } else {
-            AudioSystem::releaseInput(io, actualSessionId);
+            AudioSystem::releaseInput(portId);
         }
         ret = NO_INIT;
     }
@@ -1621,12 +1622,6 @@
         clientPid = callingPid;
     }
 
-    // check calling permissions
-    if (!recordingAllowed(input.opPackageName, input.clientInfo.clientTid, clientUid)) {
-        ALOGE("createRecord() permission denied: recording not allowed");
-        lStatus = PERMISSION_DENIED;
-        goto Exit;
-    }
     // we don't yet support anything other than linear PCM
     if (!audio_is_valid_format(input.config.format) || !audio_is_linear_pcm(input.config.format)) {
         ALOGE("createRecord() invalid format %#x", input.config.format);
@@ -1663,7 +1658,7 @@
     // release previously opened input if retrying.
     if (output.inputId != AUDIO_IO_HANDLE_NONE) {
         recordTrack.clear();
-        AudioSystem::releaseInput(output.inputId, sessionId);
+        AudioSystem::releaseInput(portId);
         output.inputId = AUDIO_IO_HANDLE_NONE;
     }
     lStatus = AudioSystem::getInputForAttr(&input.attr, &output.inputId,
@@ -1671,6 +1666,7 @@
                                     // FIXME compare to AudioTrack
                                       clientPid,
                                       clientUid,
+                                      input.opPackageName,
                                       &input.config,
                                       output.flags, &output.selectedDeviceId, &portId);
 
@@ -1739,7 +1735,7 @@
         }
         recordTrack.clear();
         if (output.inputId != AUDIO_IO_HANDLE_NONE) {
-            AudioSystem::releaseInput(output.inputId, sessionId);
+            AudioSystem::releaseInput(portId);
         }
     }
 
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 70ac32c..7bfe802 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -4874,7 +4874,7 @@
 {
     PlaybackThread::dumpInternals(fd, args);
     dprintf(fd, "  Thread throttle time (msecs): %u\n", mThreadThrottleTimeMs);
-    dprintf(fd, "  AudioMixer tracks: 0x%08x\n", mAudioMixer->trackNames());
+    dprintf(fd, "  AudioMixer tracks: %s\n", mAudioMixer->trackNames().c_str());
     dprintf(fd, "  Master mono: %s\n", mMasterMono ? "on" : "off");
 
     if (hasFastMixer()) {
@@ -6936,8 +6936,7 @@
         if (recordTrack->isExternalTrack()) {
             mLock.unlock();
             bool silenced;
-            status = AudioSystem::startInput(mId, recordTrack->sessionId(),
-                    mInDevice, recordTrack->uid(), &silenced);
+            status = AudioSystem::startInput(recordTrack->portId(), &silenced);
             mLock.lock();
             // FIXME should verify that recordTrack is still in mActiveTracks
             if (status != NO_ERROR) {
@@ -6969,7 +6968,7 @@
 
 startError:
     if (recordTrack->isExternalTrack()) {
-        AudioSystem::stopInput(mId, recordTrack->sessionId());
+        AudioSystem::stopInput(recordTrack->portId());
     }
     recordTrack->clearSyncStartEvent();
     // FIXME I wonder why we do not reset the state here?
@@ -7742,7 +7741,7 @@
     if (isOutput()) {
         AudioSystem::releaseOutput(mId, streamType(), mSessionId);
     } else {
-        AudioSystem::releaseInput(mId, mSessionId);
+        AudioSystem::releaseInput(mPortId);
     }
 }
 
@@ -7802,10 +7801,6 @@
         return NO_ERROR;
     }
 
-    if (!isOutput() && !recordingAllowed(client.packageName, client.clientPid, client.clientUid)) {
-        return PERMISSION_DENIED;
-    }
-
     audio_port_handle_t portId = AUDIO_PORT_HANDLE_NONE;
 
     audio_io_handle_t io = mId;
@@ -7837,6 +7832,7 @@
                                               mSessionId,
                                               client.clientPid,
                                               client.clientUid,
+                                              client.packageName,
                                               &config,
                                               AUDIO_INPUT_FLAG_MMAP_NOIRQ,
                                               &deviceId,
@@ -7855,7 +7851,7 @@
     } else {
         // TODO: Block recording for idle UIDs (b/72134552)
         bool silenced;
-        ret = AudioSystem::startInput(mId, mSessionId, mInDevice, client.clientUid, &silenced);
+        ret = AudioSystem::startInput(portId, &silenced);
     }
 
     // abort if start is rejected by audio policy manager
@@ -7865,7 +7861,7 @@
             if (isOutput()) {
                 AudioSystem::releaseOutput(mId, streamType(), mSessionId);
             } else {
-                AudioSystem::releaseInput(mId, mSessionId);
+                AudioSystem::releaseInput(portId);
             }
         } else {
             mHalStream->stop();
@@ -7922,8 +7918,8 @@
         AudioSystem::stopOutput(mId, streamType(), track->sessionId());
         AudioSystem::releaseOutput(mId, streamType(), track->sessionId());
     } else {
-        AudioSystem::stopInput(mId, track->sessionId());
-        AudioSystem::releaseInput(mId, track->sessionId());
+        AudioSystem::stopInput(track->portId());
+        AudioSystem::releaseInput(track->portId());
     }
 
     sp<EffectChain> chain = getEffectChain_l(track->sessionId());
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index 41d87a4..eb29497 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -623,8 +623,7 @@
     static const int8_t kMaxTrackRetriesOffload = 20;
     static const int8_t kMaxTrackStartupRetriesOffload = 100;
     static const int8_t kMaxTrackStopRetriesOffload = 2;
-    // 14 tracks max per client allows for 2 misbehaving application leaving 4 available tracks.
-    static const uint32_t kMaxTracksPerUid = 14;
+    static constexpr uint32_t kMaxTracksPerUid = 40;
 
     // Maximum delay (in nanoseconds) for upcoming buffers in suspend mode, otherwise
     // if delay is greater, the estimated time for timeLoopNextNs is reset.
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index cdd8ca0..06bbf1e 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -1687,7 +1687,7 @@
     if (thread != 0) {
         RecordThread *recordThread = (RecordThread *)thread.get();
         if (recordThread->stop(this) && isExternalTrack()) {
-            AudioSystem::stopInput(mThreadIoHandle, mSessionId);
+            AudioSystem::stopInput(mPortId);
         }
     }
 }
@@ -1699,9 +1699,9 @@
     {
         if (isExternalTrack()) {
             if (mState == ACTIVE || mState == RESUMING) {
-                AudioSystem::stopInput(mThreadIoHandle, mSessionId);
+                AudioSystem::stopInput(mPortId);
             }
-            AudioSystem::releaseInput(mThreadIoHandle, mSessionId);
+            AudioSystem::releaseInput(mPortId);
         }
         sp<ThreadBase> thread = mThread.promote();
         if (thread != 0) {
diff --git a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
index f1d7d86..306de3f 100644
--- a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
@@ -287,6 +287,7 @@
                                              audio_session_t session,
                                              pid_t pid,
                                              uid_t uid,
+                                             const String16& opPackageName,
                                              const audio_config_base_t *config,
                                              audio_input_flags_t flags,
                                              audio_port_handle_t *selectedDeviceId,
@@ -295,6 +296,7 @@
     if (mAudioPolicyManager == NULL) {
         return NO_INIT;
     }
+
     // already checked by client, but double-check in case the client wrapper is bypassed
     if (attr->source < AUDIO_SOURCE_DEFAULT && attr->source >= AUDIO_SOURCE_CNT &&
             attr->source != AUDIO_SOURCE_HOTWORD && attr->source != AUDIO_SOURCE_FM_TUNER) {
@@ -318,6 +320,13 @@
         pid = callingPid;
     }
 
+    // check calling permissions
+    if (!recordingAllowed(opPackageName, pid, uid)) {
+        ALOGE("%s permission denied: recording not allowed for uid %d pid %d",
+                __func__, uid, pid);
+        return PERMISSION_DENIED;
+    }
+
     if ((attr->source == AUDIO_SOURCE_HOTWORD) && !captureHotwordAllowed(pid, uid)) {
         return BAD_VALUE;
     }
@@ -367,6 +376,13 @@
             }
             return status;
         }
+
+        sp<AudioRecordClient> client =
+                new AudioRecordClient(*attr, *input, uid, pid, opPackageName, session);
+        client->active = false;
+        client->isConcurrent = false;
+        client->isVirtualDevice = false; //TODO : update from APM->getInputForAttr()
+        mAudioRecordClients.add(*portId, client);
     }
 
     if (audioPolicyEffects != 0) {
@@ -379,23 +395,38 @@
     return NO_ERROR;
 }
 
-status_t AudioPolicyService::startInput(audio_io_handle_t input,
-                                        audio_session_t session,
-                                        audio_devices_t device,
-                                        uid_t uid,
-                                        bool *silenced)
+status_t AudioPolicyService::startInput(audio_port_handle_t portId, bool *silenced)
 {
-    // If UID inactive it records silence until becoming active
-    *silenced = !mUidPolicy->isUidActive(uid) && !is_virtual_input_device(device);
-
     if (mAudioPolicyManager == NULL) {
         return NO_INIT;
     }
+    sp<AudioRecordClient> client;
+    {
+        Mutex::Autolock _l(mLock);
+
+        ssize_t index = mAudioRecordClients.indexOfKey(portId);
+        if (index < 0) {
+            return INVALID_OPERATION;
+        }
+        client = mAudioRecordClients.valueAt(index);
+    }
+
+    // check calling permissions
+    if (!recordingAllowed(client->opPackageName, client->pid, client->uid)) {
+        ALOGE("%s permission denied: recording not allowed for uid %d pid %d",
+                __func__, client->uid, client->pid);
+        return PERMISSION_DENIED;
+    }
+
+    // If UID inactive it records silence until becoming active
+    *silenced = !mUidPolicy->isUidActive(client->uid) && !client->isVirtualDevice;
 
     Mutex::Autolock _l(mLock);
     AudioPolicyInterface::concurrency_type__mask_t concurrency =
             AudioPolicyInterface::API_INPUT_CONCURRENCY_NONE;
-    status_t status = mAudioPolicyManager->startInput(input, session, *silenced, &concurrency);
+
+    status_t status = mAudioPolicyManager->startInput(
+            client->input, client->session, *silenced, &concurrency);
 
     if (status == NO_ERROR) {
         LOG_ALWAYS_FATAL_IF(concurrency & ~AudioPolicyInterface::API_INPUT_CONCURRENCY_ALL,
@@ -413,38 +444,52 @@
     return status;
 }
 
-status_t AudioPolicyService::stopInput(audio_io_handle_t input,
-                                       audio_session_t session)
+status_t AudioPolicyService::stopInput(audio_port_handle_t portId)
 {
     if (mAudioPolicyManager == NULL) {
         return NO_INIT;
     }
     Mutex::Autolock _l(mLock);
 
-    return mAudioPolicyManager->stopInput(input, session);
+    ssize_t index = mAudioRecordClients.indexOfKey(portId);
+    if (index < 0) {
+        return INVALID_OPERATION;
+    }
+    sp<AudioRecordClient> client = mAudioRecordClients.valueAt(index);
+
+    return mAudioPolicyManager->stopInput(client->input, client->session);
 }
 
-void AudioPolicyService::releaseInput(audio_io_handle_t input,
-                                      audio_session_t session)
+void AudioPolicyService::releaseInput(audio_port_handle_t portId)
 {
     if (mAudioPolicyManager == NULL) {
         return;
     }
     sp<AudioPolicyEffects>audioPolicyEffects;
+    sp<AudioRecordClient> client;
     {
         Mutex::Autolock _l(mLock);
         audioPolicyEffects = mAudioPolicyEffects;
+        ssize_t index = mAudioRecordClients.indexOfKey(portId);
+        if (index < 0) {
+            return;
+        }
+        client = mAudioRecordClients.valueAt(index);
+        mAudioRecordClients.removeItem(portId);
+    }
+    if (client == 0) {
+        return;
     }
     if (audioPolicyEffects != 0) {
         // release audio processors from the input
-        status_t status = audioPolicyEffects->releaseInputEffects(input, session);
+        status_t status = audioPolicyEffects->releaseInputEffects(client->input, client->session);
         if(status != NO_ERROR) {
-            ALOGW("Failed to release effects on input %d", input);
+            ALOGW("Failed to release effects on input %d", client->input);
         }
     }
     {
         Mutex::Autolock _l(mLock);
-        mAudioPolicyManager->releaseInput(input, session);
+        mAudioPolicyManager->releaseInput(client->input, client->session);
     }
 }
 
diff --git a/services/audiopolicy/service/AudioPolicyService.h b/services/audiopolicy/service/AudioPolicyService.h
index c21aa58..bfa3ef4 100644
--- a/services/audiopolicy/service/AudioPolicyService.h
+++ b/services/audiopolicy/service/AudioPolicyService.h
@@ -98,19 +98,15 @@
                                      audio_session_t session,
                                      pid_t pid,
                                      uid_t uid,
+                                     const String16& opPackageName,
                                      const audio_config_base_t *config,
                                      audio_input_flags_t flags,
                                      audio_port_handle_t *selectedDeviceId = NULL,
                                      audio_port_handle_t *portId = NULL);
-    virtual status_t startInput(audio_io_handle_t input,
-                                audio_session_t session,
-                                audio_devices_t device,
-                                uid_t uid,
+    virtual status_t startInput(audio_port_handle_t portId,
                                 bool *silenced);
-    virtual status_t stopInput(audio_io_handle_t input,
-                               audio_session_t session);
-    virtual void releaseInput(audio_io_handle_t input,
-                              audio_session_t session);
+    virtual status_t stopInput(audio_port_handle_t portId);
+    virtual void releaseInput(audio_port_handle_t portId);
     virtual status_t initStreamVolume(audio_stream_type_t stream,
                                       int indexMin,
                                       int indexMax);
@@ -611,6 +607,31 @@
               bool                          mAudioPortCallbacksEnabled;
     };
 
+    // --- AudioRecordClient ---
+    // Information about each registered AudioRecord client
+    // (between calls to getInputForAttr() and releaseInput())
+    class AudioRecordClient : public RefBase {
+    public:
+                AudioRecordClient(const audio_attributes_t attributes,
+                                  const audio_io_handle_t input, uid_t uid, pid_t pid,
+                                  const String16& opPackageName, const audio_session_t session) :
+                                      attributes(attributes),
+                                      input(input), uid(uid), pid(pid),
+                                      opPackageName(opPackageName), session(session),
+                                      active(false), isConcurrent(false), isVirtualDevice(false) {}
+        virtual ~AudioRecordClient() {}
+
+        const audio_attributes_t attributes; // source, flags ...
+        const audio_io_handle_t input;       // audio HAL input IO handle
+        const uid_t uid;                     // client UID
+        const pid_t pid;                     // client PID
+        const String16 opPackageName;        // client package name
+        const audio_session_t session;       // audio session ID
+        bool active;                   // Capture is active or inactive
+        bool isConcurrent;             // is allowed to concurrent capture
+        bool isVirtualDevice;          // uses vitual device: updated by APM::getInputForAttr()
+    };
+
     // Internal dump utilities.
     status_t dumpPermissionDenial(int fd);
 
@@ -636,6 +657,7 @@
     audio_mode_t mPhoneState;
 
     sp<UidPolicy> mUidPolicy;
+    DefaultKeyedVector< audio_port_handle_t, sp<AudioRecordClient> >   mAudioRecordClients;
 };
 
 } // namespace android
diff --git a/services/camera/libcameraservice/api2/CameraDeviceClient.cpp b/services/camera/libcameraservice/api2/CameraDeviceClient.cpp
index c36c7cf..1ebaea9 100644
--- a/services/camera/libcameraservice/api2/CameraDeviceClient.cpp
+++ b/services/camera/libcameraservice/api2/CameraDeviceClient.cpp
@@ -1697,7 +1697,8 @@
     // Thread-safe. No lock necessary.
     sp<hardware::camera2::ICameraDeviceCallbacks> remoteCb = mRemoteCallback;
     if (remoteCb != NULL) {
-        remoteCb->onResultReceived(result.mMetadata, result.mResultExtras);
+        remoteCb->onResultReceived(result.mMetadata, result.mResultExtras,
+                result.mPhysicalMetadatas);
     }
 }
 
diff --git a/services/camera/libcameraservice/device3/Camera3Device.cpp b/services/camera/libcameraservice/device3/Camera3Device.cpp
index 999e258..b868fa6 100644
--- a/services/camera/libcameraservice/device3/Camera3Device.cpp
+++ b/services/camera/libcameraservice/device3/Camera3Device.cpp
@@ -39,6 +39,8 @@
 
 #include <inttypes.h>
 
+#include <utility>
+
 #include <utils/Log.h>
 #include <utils/Trace.h>
 #include <utils/Timers.h>
@@ -874,11 +876,9 @@
     return res;
 }
 
-// Only one processCaptureResult should be called at a time, so
-// the locks won't block. The locks are present here simply to enforce this.
-hardware::Return<void> Camera3Device::processCaptureResult(
+hardware::Return<void> Camera3Device::processCaptureResult_3_4(
         const hardware::hidl_vec<
-                hardware::camera::device::V3_2::CaptureResult>& results) {
+                hardware::camera::device::V3_4::CaptureResult>& results) {
     // Ideally we should grab mLock, but that can lead to deadlock, and
     // it's not super important to get up to date value of mStatus for this
     // warning print, hence skipping the lock here
@@ -902,45 +902,121 @@
         }
     }
     for (const auto& result : results) {
-        processOneCaptureResultLocked(result);
+        processOneCaptureResultLocked(result.v3_2, result.physicalCameraMetadata);
     }
     mProcessCaptureResultLock.unlock();
     return hardware::Void();
 }
 
+// Only one processCaptureResult should be called at a time, so
+// the locks won't block. The locks are present here simply to enforce this.
+hardware::Return<void> Camera3Device::processCaptureResult(
+        const hardware::hidl_vec<
+                hardware::camera::device::V3_2::CaptureResult>& results) {
+    hardware::hidl_vec<hardware::camera::device::V3_4::PhysicalCameraMetadata> noPhysMetadata;
+
+    // Ideally we should grab mLock, but that can lead to deadlock, and
+    // it's not super important to get up to date value of mStatus for this
+    // warning print, hence skipping the lock here
+    if (mStatus == STATUS_ERROR) {
+        // Per API contract, HAL should act as closed after device error
+        // But mStatus can be set to error by framework as well, so just log
+        // a warning here.
+        ALOGW("%s: received capture result in error state.", __FUNCTION__);
+    }
+
+    if (mProcessCaptureResultLock.tryLock() != OK) {
+        // This should never happen; it indicates a wrong client implementation
+        // that doesn't follow the contract. But, we can be tolerant here.
+        ALOGE("%s: callback overlapped! waiting 1s...",
+                __FUNCTION__);
+        if (mProcessCaptureResultLock.timedLock(1000000000 /* 1s */) != OK) {
+            ALOGE("%s: cannot acquire lock in 1s, dropping results",
+                    __FUNCTION__);
+            // really don't know what to do, so bail out.
+            return hardware::Void();
+        }
+    }
+    for (const auto& result : results) {
+        processOneCaptureResultLocked(result, noPhysMetadata);
+    }
+    mProcessCaptureResultLock.unlock();
+    return hardware::Void();
+}
+
+status_t Camera3Device::readOneCameraMetadataLocked(
+        uint64_t fmqResultSize, hardware::camera::device::V3_2::CameraMetadata& resultMetadata,
+        const hardware::camera::device::V3_2::CameraMetadata& result) {
+    if (fmqResultSize > 0) {
+        resultMetadata.resize(fmqResultSize);
+        if (mResultMetadataQueue == nullptr) {
+            return NO_MEMORY; // logged in initialize()
+        }
+        if (!mResultMetadataQueue->read(resultMetadata.data(), fmqResultSize)) {
+            ALOGE("%s: Cannot read camera metadata from fmq, size = %" PRIu64,
+                    __FUNCTION__, fmqResultSize);
+            return INVALID_OPERATION;
+        }
+    } else {
+        resultMetadata.setToExternal(const_cast<uint8_t *>(result.data()),
+                result.size());
+    }
+
+    if (resultMetadata.size() != 0) {
+        status_t res;
+        const camera_metadata_t* metadata =
+                reinterpret_cast<const camera_metadata_t*>(resultMetadata.data());
+        size_t expected_metadata_size = resultMetadata.size();
+        if ((res = validate_camera_metadata_structure(metadata, &expected_metadata_size)) != OK) {
+            ALOGE("%s: Invalid camera metadata received by camera service from HAL: %s (%d)",
+                    __FUNCTION__, strerror(-res), res);
+            return INVALID_OPERATION;
+        }
+    }
+
+    return OK;
+}
+
 void Camera3Device::processOneCaptureResultLocked(
-        const hardware::camera::device::V3_2::CaptureResult& result) {
+        const hardware::camera::device::V3_2::CaptureResult& result,
+        const hardware::hidl_vec<
+                hardware::camera::device::V3_4::PhysicalCameraMetadata> physicalCameraMetadatas) {
     camera3_capture_result r;
     status_t res;
     r.frame_number = result.frameNumber;
 
+    // Read and validate the result metadata.
     hardware::camera::device::V3_2::CameraMetadata resultMetadata;
-    if (result.fmqResultSize > 0) {
-        resultMetadata.resize(result.fmqResultSize);
-        if (mResultMetadataQueue == nullptr) {
-            return; // logged in initialize()
-        }
-        if (!mResultMetadataQueue->read(resultMetadata.data(), result.fmqResultSize)) {
-            ALOGE("%s: Frame %d: Cannot read camera metadata from fmq, size = %" PRIu64,
-                    __FUNCTION__, result.frameNumber, result.fmqResultSize);
-            return;
-        }
-    } else {
-        resultMetadata.setToExternal(const_cast<uint8_t *>(result.result.data()),
-                result.result.size());
+    res = readOneCameraMetadataLocked(result.fmqResultSize, resultMetadata, result.result);
+    if (res != OK) {
+        ALOGE("%s: Frame %d: Failed to read capture result metadata",
+                __FUNCTION__, result.frameNumber);
+        return;
     }
+    r.result = reinterpret_cast<const camera_metadata_t*>(resultMetadata.data());
 
-    if (resultMetadata.size() != 0) {
-        r.result = reinterpret_cast<const camera_metadata_t*>(resultMetadata.data());
-        size_t expected_metadata_size = resultMetadata.size();
-        if ((res = validate_camera_metadata_structure(r.result, &expected_metadata_size)) != OK) {
-            ALOGE("%s: Frame %d: Invalid camera metadata received by camera service from HAL: %s (%d)",
-                    __FUNCTION__, result.frameNumber, strerror(-res), res);
+    // Read and validate physical camera metadata
+    size_t physResultCount = physicalCameraMetadatas.size();
+    std::vector<const char*> physCamIds(physResultCount);
+    std::vector<const camera_metadata_t *> phyCamMetadatas(physResultCount);
+    std::vector<hardware::camera::device::V3_2::CameraMetadata> physResultMetadata;
+    physResultMetadata.resize(physResultCount);
+    for (size_t i = 0; i < physicalCameraMetadatas.size(); i++) {
+        res = readOneCameraMetadataLocked(physicalCameraMetadatas[i].fmqMetadataSize,
+                physResultMetadata[i], physicalCameraMetadatas[i].metadata);
+        if (res != OK) {
+            ALOGE("%s: Frame %d: Failed to read capture result metadata for camera %s",
+                    __FUNCTION__, result.frameNumber,
+                    physicalCameraMetadatas[i].physicalCameraId.c_str());
             return;
         }
-    } else {
-        r.result = nullptr;
+        physCamIds[i] = physicalCameraMetadatas[i].physicalCameraId.c_str();
+        phyCamMetadatas[i] = reinterpret_cast<const camera_metadata_t*>(
+                physResultMetadata[i].data());
     }
+    r.num_physcam_metadata = physResultCount;
+    r.physcam_ids = physCamIds.data();
+    r.physcam_metadata = phyCamMetadatas.data();
 
     std::vector<camera3_stream_buffer_t> outputBuffers(result.outputBuffers.size());
     std::vector<buffer_handle_t> outputBufferHandles(result.outputBuffers.size());
@@ -1806,6 +1882,7 @@
     CaptureResult &result = *(mResultQueue.begin());
     frame->mResultExtras = result.mResultExtras;
     frame->mMetadata.acquire(result.mMetadata);
+    frame->mPhysicalMetadatas = std::move(result.mPhysicalMetadatas);
     mResultQueue.erase(mResultQueue.begin());
 
     return OK;
@@ -2579,13 +2656,14 @@
 
 status_t Camera3Device::registerInFlight(uint32_t frameNumber,
         int32_t numBuffers, CaptureResultExtras resultExtras, bool hasInput,
-        bool hasAppCallback, nsecs_t maxExpectedDuration) {
+        bool hasAppCallback, nsecs_t maxExpectedDuration,
+        std::set<String8>& physicalCameraIds) {
     ATRACE_CALL();
     Mutex::Autolock l(mInFlightLock);
 
     ssize_t res;
     res = mInFlightMap.add(frameNumber, InFlightRequest(numBuffers, resultExtras, hasInput,
-            hasAppCallback, maxExpectedDuration));
+            hasAppCallback, maxExpectedDuration, physicalCameraIds));
     if (res < 0) return res;
 
     if (mInFlightMap.size() == 1) {
@@ -2825,7 +2903,8 @@
         CaptureResultExtras &resultExtras,
         CameraMetadata &collectedPartialResult,
         uint32_t frameNumber,
-        bool reprocess) {
+        bool reprocess,
+        const std::vector<PhysicalCaptureResultInfo>& physicalMetadatas) {
     ATRACE_CALL();
     if (pendingMetadata.isEmpty())
         return;
@@ -2854,6 +2933,7 @@
     CaptureResult captureResult;
     captureResult.mResultExtras = resultExtras;
     captureResult.mMetadata = pendingMetadata;
+    captureResult.mPhysicalMetadatas = physicalMetadatas;
 
     // Append any previous partials to form a complete result
     if (mUsePartialResult && !collectedPartialResult.isEmpty()) {
@@ -2869,6 +2949,15 @@
                 frameNumber);
         return;
     }
+    for (auto& physicalMetadata : captureResult.mPhysicalMetadatas) {
+        camera_metadata_entry timestamp =
+                physicalMetadata.mPhysicalCameraMetadata.find(ANDROID_SENSOR_TIMESTAMP);
+        if (timestamp.count == 0) {
+            SET_ERR("No timestamp provided by HAL for physical camera %s frame %d!",
+                    String8(physicalMetadata.mPhysicalCameraId).c_str(), frameNumber);
+            return;
+        }
+    }
 
     mTagMonitor.monitorMetadata(TagMonitor::RESULT,
             frameNumber, timestamp.data.i64[0], captureResult.mMetadata);
@@ -2904,7 +2993,6 @@
 
     bool isPartialResult = false;
     CameraMetadata collectedPartialResult;
-    CaptureResultExtras resultExtras;
     bool hasInputBufferInRequest = false;
 
     // Get shutter timestamp and resultExtras from list of in-flight requests,
@@ -2945,6 +3033,11 @@
                 return;
             }
             isPartialResult = (result->partial_result < mNumPartialResults);
+            if (isPartialResult && result->num_physcam_metadata) {
+                SET_ERR("Result is malformed for frame %d: partial_result not allowed for"
+                        " physical camera result", frameNumber);
+                return;
+            }
             if (isPartialResult) {
                 request.collectedPartialResult.append(result->result);
             }
@@ -2961,11 +3054,28 @@
 
         // Did we get the (final) result metadata for this capture?
         if (result->result != NULL && !isPartialResult) {
+            if (request.physicalCameraIds.size() != result->num_physcam_metadata) {
+                SET_ERR("Requested physical Camera Ids %d not equal to number of metadata %d",
+                        request.physicalCameraIds.size(), result->num_physcam_metadata);
+                return;
+            }
             if (request.haveResultMetadata) {
                 SET_ERR("Called multiple times with metadata for frame %d",
                         frameNumber);
                 return;
             }
+            for (uint32_t i = 0; i < result->num_physcam_metadata; i++) {
+                String8 physicalId(result->physcam_ids[i]);
+                std::set<String8>::iterator cameraIdIter =
+                        request.physicalCameraIds.find(physicalId);
+                if (cameraIdIter != request.physicalCameraIds.end()) {
+                    request.physicalCameraIds.erase(cameraIdIter);
+                } else {
+                    SET_ERR("Total result for frame %d has already returned for camera %s",
+                            frameNumber, physicalId.c_str());
+                    return;
+                }
+            }
             if (mUsePartialResult &&
                     !request.collectedPartialResult.isEmpty()) {
                 collectedPartialResult.acquire(
@@ -3010,15 +3120,21 @@
         }
 
         if (result->result != NULL && !isPartialResult) {
+            for (uint32_t i = 0; i < result->num_physcam_metadata; i++) {
+                CameraMetadata physicalMetadata;
+                physicalMetadata.append(result->physcam_metadata[i]);
+                request.physicalMetadatas.push_back({String16(result->physcam_ids[i]),
+                        physicalMetadata});
+            }
             if (shutterTimestamp == 0) {
                 request.pendingMetadata = result->result;
                 request.collectedPartialResult = collectedPartialResult;
-            } else if (request.hasCallback) {
+           } else if (request.hasCallback) {
                 CameraMetadata metadata;
                 metadata = result->result;
                 sendCaptureResult(metadata, request.resultExtras,
                     collectedPartialResult, frameNumber,
-                    hasInputBufferInRequest);
+                    hasInputBufferInRequest, request.physicalMetadatas);
             }
         }
 
@@ -3204,7 +3320,7 @@
                 // send pending result and buffers
                 sendCaptureResult(r.pendingMetadata, r.resultExtras,
                     r.collectedPartialResult, msg.frame_number,
-                    r.hasInputBuffer);
+                    r.hasInputBuffer, r.physicalMetadatas);
             }
             returnOutputBuffers(r.pendingOutputBuffers.array(),
                 r.pendingOutputBuffers.size(), r.shutterTimestamp);
@@ -3219,7 +3335,6 @@
     }
 }
 
-
 CameraMetadata Camera3Device::getLatestRequestLocked() {
     ALOGV("%s", __FUNCTION__);
 
@@ -4657,6 +4772,7 @@
         outputBuffers->insertAt(camera3_stream_buffer_t(), 0,
                 captureRequest->mOutputStreams.size());
         halRequest->output_buffers = outputBuffers->array();
+        std::set<String8> requestedPhysicalCameras;
         for (size_t j = 0; j < captureRequest->mOutputStreams.size(); j++) {
             sp<Camera3OutputStreamInterface> outputStream = captureRequest->mOutputStreams.editItemAt(j);
 
@@ -4687,8 +4803,18 @@
 
                 return TIMED_OUT;
             }
-            halRequest->num_output_buffers++;
 
+            String8 physicalCameraId = outputStream->getPhysicalCameraId();
+
+            if (!physicalCameraId.isEmpty()) {
+                // Physical stream isn't supported for input request.
+                if (halRequest->input_buffer) {
+                    CLOGE("Physical stream is not supported for input request");
+                    return INVALID_OPERATION;
+                }
+                requestedPhysicalCameras.insert(physicalCameraId);
+            }
+            halRequest->num_output_buffers++;
         }
         totalNumBuffers += halRequest->num_output_buffers;
 
@@ -4711,7 +4837,8 @@
                 totalNumBuffers, captureRequest->mResultExtras,
                 /*hasInput*/halRequest->input_buffer != NULL,
                 hasCallback,
-                calculateMaxExpectedDuration(halRequest->settings));
+                calculateMaxExpectedDuration(halRequest->settings),
+                requestedPhysicalCameras);
         ALOGVV("%s: registered in flight requestId = %" PRId32 ", frameNumber = %" PRId64
                ", burstId = %" PRId32 ".",
                 __FUNCTION__,
diff --git a/services/camera/libcameraservice/device3/Camera3Device.h b/services/camera/libcameraservice/device3/Camera3Device.h
index bf2a577..bc97510 100644
--- a/services/camera/libcameraservice/device3/Camera3Device.h
+++ b/services/camera/libcameraservice/device3/Camera3Device.h
@@ -19,6 +19,7 @@
 
 #include <utility>
 #include <unordered_map>
+#include <set>
 
 #include <utils/Condition.h>
 #include <utils/Errors.h>
@@ -33,6 +34,7 @@
 #include <android/hardware/camera/device/3.3/ICameraDeviceSession.h>
 #include <android/hardware/camera/device/3.4/ICameraDeviceSession.h>
 #include <android/hardware/camera/device/3.2/ICameraDeviceCallback.h>
+#include <android/hardware/camera/device/3.4/ICameraDeviceCallback.h>
 #include <fmq/MessageQueue.h>
 #include <hardware/camera3.h>
 
@@ -77,7 +79,7 @@
  */
 class Camera3Device :
             public CameraDeviceBase,
-            virtual public hardware::camera::device::V3_2::ICameraDeviceCallback,
+            virtual public hardware::camera::device::V3_4::ICameraDeviceCallback,
             private camera3_callback_ops {
   public:
 
@@ -472,9 +474,11 @@
 
 
     /**
-     * Implementation of android::hardware::camera::device::V3_2::ICameraDeviceCallback
+     * Implementation of android::hardware::camera::device::V3_4::ICameraDeviceCallback
      */
-
+    hardware::Return<void> processCaptureResult_3_4(
+            const hardware::hidl_vec<
+                    hardware::camera::device::V3_4::CaptureResult>& results) override;
     hardware::Return<void> processCaptureResult(
             const hardware::hidl_vec<
                     hardware::camera::device::V3_2::CaptureResult>& results) override;
@@ -484,7 +488,13 @@
 
     // Handle one capture result. Assume that mProcessCaptureResultLock is held.
     void processOneCaptureResultLocked(
-            const hardware::camera::device::V3_2::CaptureResult& results);
+            const hardware::camera::device::V3_2::CaptureResult& result,
+            const hardware::hidl_vec<
+            hardware::camera::device::V3_4::PhysicalCameraMetadata> physicalCameraMetadatas);
+    status_t readOneCameraMetadataLocked(uint64_t fmqResultSize,
+            hardware::camera::device::V3_2::CameraMetadata& resultMetadata,
+            const hardware::camera::device::V3_2::CameraMetadata& result);
+
     // Handle one notify message
     void notify(const hardware::camera::device::V3_2::NotifyMsg& msg);
 
@@ -965,6 +975,12 @@
         // REQUEST/RESULT error.
         bool skipResultMetadata;
 
+        // The physical camera ids being requested.
+        std::set<String8> physicalCameraIds;
+
+        // Map of physicalCameraId <-> Metadata
+        std::vector<PhysicalCaptureResultInfo> physicalMetadatas;
+
         // Default constructor needed by KeyedVector
         InFlightRequest() :
                 shutterTimestamp(0),
@@ -979,7 +995,8 @@
         }
 
         InFlightRequest(int numBuffers, CaptureResultExtras extras, bool hasInput,
-                bool hasAppCallback, nsecs_t maxDuration) :
+                bool hasAppCallback, nsecs_t maxDuration,
+                const std::set<String8>& physicalCameraIdSet) :
                 shutterTimestamp(0),
                 sensorTimestamp(0),
                 requestStatus(OK),
@@ -989,7 +1006,8 @@
                 hasInputBuffer(hasInput),
                 hasCallback(hasAppCallback),
                 maxExpectedDuration(maxDuration),
-                skipResultMetadata(false) {
+                skipResultMetadata(false),
+                physicalCameraIds(physicalCameraIdSet) {
         }
     };
 
@@ -1006,7 +1024,7 @@
 
     status_t registerInFlight(uint32_t frameNumber,
             int32_t numBuffers, CaptureResultExtras resultExtras, bool hasInput,
-            bool callback, nsecs_t maxExpectedDuration);
+            bool callback, nsecs_t maxExpectedDuration, std::set<String8>& physicalCameraIds);
 
     /**
      * Returns the maximum expected time it'll take for all currently in-flight
@@ -1127,7 +1145,9 @@
     void sendCaptureResult(CameraMetadata &pendingMetadata,
             CaptureResultExtras &resultExtras,
             CameraMetadata &collectedPartialResult, uint32_t frameNumber,
-            bool reprocess);
+            bool reprocess, const std::vector<PhysicalCaptureResultInfo>& physicalMetadatas);
+
+    bool isLastFullResult(const InFlightRequest& inFlightRequest);
 
     // Insert the result to the result queue after updating frame number and overriding AE
     // trigger cancel.
diff --git a/services/camera/libcameraservice/device3/Camera3DummyStream.cpp b/services/camera/libcameraservice/device3/Camera3DummyStream.cpp
index 44eb68a..fb1ff77 100644
--- a/services/camera/libcameraservice/device3/Camera3DummyStream.cpp
+++ b/services/camera/libcameraservice/device3/Camera3DummyStream.cpp
@@ -115,6 +115,10 @@
     return OK;
 }
 
+const String8& Camera3DummyStream::getPhysicalCameraId() const {
+    return DUMMY_ID;
+}
+
 status_t Camera3DummyStream::setConsumers(const std::vector<sp<Surface>>& /*consumers*/) {
     ALOGE("%s: Stream %d: Dummy stream doesn't support set consumer surface!",
             __FUNCTION__, mId);
diff --git a/services/camera/libcameraservice/device3/Camera3DummyStream.h b/services/camera/libcameraservice/device3/Camera3DummyStream.h
index dcf9160..4627548 100644
--- a/services/camera/libcameraservice/device3/Camera3DummyStream.h
+++ b/services/camera/libcameraservice/device3/Camera3DummyStream.h
@@ -63,6 +63,11 @@
     virtual status_t dropBuffers(bool /*dropping*/) override;
 
     /**
+     * Query the physical camera id for the output stream.
+     */
+    virtual const String8& getPhysicalCameraId() const override;
+
+    /**
      * Return if this output stream is for video encoding.
      */
     bool isVideoStream() const;
diff --git a/services/camera/libcameraservice/device3/Camera3OutputStream.cpp b/services/camera/libcameraservice/device3/Camera3OutputStream.cpp
index b73e256..b3c3717 100644
--- a/services/camera/libcameraservice/device3/Camera3OutputStream.cpp
+++ b/services/camera/libcameraservice/device3/Camera3OutputStream.cpp
@@ -806,6 +806,11 @@
     return OK;
 }
 
+const String8& Camera3OutputStream::getPhysicalCameraId() const {
+    Mutex::Autolock l(mLock);
+    return physicalCameraId();
+}
+
 status_t Camera3OutputStream::notifyBufferReleased(ANativeWindowBuffer* /*anwBuffer*/) {
     return OK;
 }
diff --git a/services/camera/libcameraservice/device3/Camera3OutputStream.h b/services/camera/libcameraservice/device3/Camera3OutputStream.h
index 824aef7..6f36f92 100644
--- a/services/camera/libcameraservice/device3/Camera3OutputStream.h
+++ b/services/camera/libcameraservice/device3/Camera3OutputStream.h
@@ -174,6 +174,11 @@
     virtual status_t dropBuffers(bool dropping) override;
 
     /**
+     * Query the physical camera id for the output stream.
+     */
+    virtual const String8& getPhysicalCameraId() const override;
+
+    /**
      * Set the graphic buffer manager to get/return the stream buffers.
      *
      * It is only legal to call this method when stream is in STATE_CONSTRUCTED state.
diff --git a/services/camera/libcameraservice/device3/Camera3OutputStreamInterface.h b/services/camera/libcameraservice/device3/Camera3OutputStreamInterface.h
index 08fcf38..a711a6d 100644
--- a/services/camera/libcameraservice/device3/Camera3OutputStreamInterface.h
+++ b/services/camera/libcameraservice/device3/Camera3OutputStreamInterface.h
@@ -78,6 +78,11 @@
      * Drop buffers if dropping is true. If dropping is false, do not drop buffers.
      */
     virtual status_t dropBuffers(bool /*dropping*/) = 0;
+
+    /**
+     * Query the physical camera id for the output stream.
+     */
+    virtual const String8& getPhysicalCameraId() const = 0;
 };
 
 } // namespace camera3
diff --git a/services/camera/libcameraservice/device3/Camera3Stream.cpp b/services/camera/libcameraservice/device3/Camera3Stream.cpp
index 0d91620..1105b75 100644
--- a/services/camera/libcameraservice/device3/Camera3Stream.cpp
+++ b/services/camera/libcameraservice/device3/Camera3Stream.cpp
@@ -143,6 +143,10 @@
     return mOriginalDataSpace;
 }
 
+const String8& Camera3Stream::physicalCameraId() const {
+    return mPhysicalCameraId;
+}
+
 status_t Camera3Stream::forceToIdle() {
     ATRACE_CALL();
     Mutex::Autolock l(mLock);
diff --git a/services/camera/libcameraservice/device3/Camera3Stream.h b/services/camera/libcameraservice/device3/Camera3Stream.h
index f85dff2..a60cb56 100644
--- a/services/camera/libcameraservice/device3/Camera3Stream.h
+++ b/services/camera/libcameraservice/device3/Camera3Stream.h
@@ -165,6 +165,7 @@
     void              setDataSpaceOverride(bool dataSpaceOverriden);
     bool              isDataSpaceOverridden() const;
     android_dataspace getOriginalDataSpace() const;
+    const String8&    physicalCameraId() const;
 
     camera3_stream*   asHalStream() override {
         return this;