diff --git a/include/media/stagefright/CameraSource.h b/include/media/stagefright/CameraSource.h
index 3192d03..fd30ba5 100644
--- a/include/media/stagefright/CameraSource.h
+++ b/include/media/stagefright/CameraSource.h
@@ -35,6 +35,10 @@
     static CameraSource *Create();
     static CameraSource *CreateFromCamera(const sp<Camera> &camera);
 
+    void enableTimeLapseMode(
+            int64_t timeBetweenTimeLapseFrameCaptureUs, int32_t videoFrameRate);
+    void disableTimeLapseMode();
+
     virtual ~CameraSource();
 
     virtual status_t start(MetaData *params = NULL);
@@ -71,6 +75,14 @@
     bool mCollectStats;
     bool mStarted;
 
+    // Time between capture of two frames during time lapse recording
+    // Negative value indicates that timelapse is disabled.
+    int64_t mTimeBetweenTimeLapseFrameCaptureUs;
+    // Time between two frames in final video (1/frameRate)
+    int64_t mTimeBetweenTimeLapseVideoFramesUs;
+    // Real timestamp of the last encoded time lapse frame
+    int64_t mLastTimeLapseFrameRealTimestampUs;
+
     CameraSource(const sp<Camera> &camera);
 
     void dataCallbackTimestamp(
diff --git a/media/libmedia/AudioSystem.cpp b/media/libmedia/AudioSystem.cpp
index c77f551..372a927 100644
--- a/media/libmedia/AudioSystem.cpp
+++ b/media/libmedia/AudioSystem.cpp
@@ -727,7 +727,8 @@
     if ((popCount(device) == 1 ) &&
         (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_SCO |
                    AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET |
-                   AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT))) {
+                   AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT |
+                   AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET))) {
         return true;
     } else {
         return false;
diff --git a/media/libmedia/MediaScanner.cpp b/media/libmedia/MediaScanner.cpp
index 6f581d3..ba98f04 100644
--- a/media/libmedia/MediaScanner.cpp
+++ b/media/libmedia/MediaScanner.cpp
@@ -81,13 +81,13 @@
 }
 
 static bool fileMatchesExtension(const char* path, const char* extensions) {
-    char* extension = strrchr(path, '.');
+    const char* extension = strrchr(path, '.');
     if (!extension) return false;
     ++extension;    // skip the dot
     if (extension[0] == 0) return false;
 
     while (extensions[0]) {
-        char* comma = strchr(extensions, ',');
+        const char* comma = strchr(extensions, ',');
         size_t length = (comma ? comma - extensions : strlen(extensions));
         if (length == strlen(extension) && strncasecmp(extension, extensions, length) == 0) return true;
         extensions += length;
@@ -133,6 +133,13 @@
             continue;
         }
 
+        int nameLength = strlen(name);
+        if (nameLength + 1 > pathRemaining) {
+            // path too long!
+            continue;
+        }
+        strcpy(fileSpot, name);
+
         int type = entry->d_type;
         if (type == DT_UNKNOWN) {
             // If the type is unknown, stat() the file instead.
@@ -150,16 +157,7 @@
             }
         }
         if (type == DT_REG || type == DT_DIR) {
-            int nameLength = strlen(name);
-            bool isDirectory = (type == DT_DIR);
-
-            if (nameLength > pathRemaining || (isDirectory && nameLength + 1 > pathRemaining)) {
-                // path too long!
-                continue;
-            }
-
-            strcpy(fileSpot, name);
-            if (isDirectory) {
+            if (type == DT_DIR) {
                 // ignore directories with a name that starts with '.'
                 // for example, the Mac ".Trashes" directory
                 if (name[0] == '.') continue;
diff --git a/media/libmediaplayerservice/StagefrightRecorder.cpp b/media/libmediaplayerservice/StagefrightRecorder.cpp
index 4840391..24b0e7b 100644
--- a/media/libmediaplayerservice/StagefrightRecorder.cpp
+++ b/media/libmediaplayerservice/StagefrightRecorder.cpp
@@ -897,6 +897,9 @@
 
     sp<CameraSource> cameraSource = CameraSource::CreateFromCamera(mCamera);
     CHECK(cameraSource != NULL);
+    if(mCaptureTimeLapse) {
+        cameraSource->enableTimeLapseMode(1E6, mFrameRate);
+    }
 
     sp<MetaData> enc_meta = new MetaData;
     enc_meta->setInt32(kKeyBitRate, mVideoBitRate);
@@ -984,7 +987,7 @@
     sp<MediaWriter> writer = new MPEG4Writer(dup(mOutputFd));
 
     // Add audio source first if it exists
-    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
+    if (!mCaptureTimeLapse && (mAudioSource != AUDIO_SOURCE_LIST_END)) {
         err = setupAudioEncoder(writer);
         if (err != OK) return err;
         totalBitRate += mAudioBitRate;
@@ -1094,6 +1097,7 @@
     mMaxFileSizeBytes = 0;
     mTrackEveryNumberOfFrames = 0;
     mTrackEveryTimeDurationUs = 0;
+    mCaptureTimeLapse = false;
     mEncoderProfiles = MediaProfiles::getInstance();
 
     mOutputFd = -1;
diff --git a/media/libmediaplayerservice/StagefrightRecorder.h b/media/libmediaplayerservice/StagefrightRecorder.h
index 9ab02cd..f51d7f8 100644
--- a/media/libmediaplayerservice/StagefrightRecorder.h
+++ b/media/libmediaplayerservice/StagefrightRecorder.h
@@ -93,6 +93,8 @@
     int32_t mTrackEveryNumberOfFrames;
     int64_t mTrackEveryTimeDurationUs;
 
+    bool mCaptureTimeLapse;
+
     String8 mParams;
     int mOutputFd;
     int32_t mFlags;
diff --git a/media/libstagefright/CameraSource.cpp b/media/libstagefright/CameraSource.cpp
index 6f4c980..bb53d97 100644
--- a/media/libstagefright/CameraSource.cpp
+++ b/media/libstagefright/CameraSource.cpp
@@ -116,6 +116,19 @@
     return new CameraSource(camera);
 }
 
+void CameraSource::enableTimeLapseMode(
+        int64_t timeBetweenTimeLapseFrameCaptureUs, int32_t videoFrameRate) {
+    LOGV("starting time lapse mode");
+    mTimeBetweenTimeLapseFrameCaptureUs = timeBetweenTimeLapseFrameCaptureUs;
+    mTimeBetweenTimeLapseVideoFramesUs = (1E6/videoFrameRate);
+}
+
+void CameraSource::disableTimeLapseMode() {
+    LOGV("stopping time lapse mode");
+    mTimeBetweenTimeLapseFrameCaptureUs = -1;
+    mTimeBetweenTimeLapseVideoFramesUs = 0;
+}
+
 CameraSource::CameraSource(const sp<Camera> &camera)
     : mCamera(camera),
       mFirstFrameTimeUs(0),
@@ -126,7 +139,10 @@
       mNumGlitches(0),
       mGlitchDurationThresholdUs(200000),
       mCollectStats(false),
-      mStarted(false) {
+      mStarted(false),
+      mTimeBetweenTimeLapseFrameCaptureUs(-1),
+      mTimeBetweenTimeLapseVideoFramesUs(0),
+      mLastTimeLapseFrameRealTimestampUs(0) {
 
     int64_t token = IPCThreadState::self()->clearCallingIdentity();
     String8 s = mCamera->getParameters();
@@ -316,6 +332,35 @@
         ++mNumGlitches;
     }
 
+    // time lapse
+    if(mTimeBetweenTimeLapseFrameCaptureUs >= 0) {
+        if(mLastTimeLapseFrameRealTimestampUs == 0) {
+            // First time lapse frame. Initialize mLastTimeLapseFrameRealTimestampUs
+            // to current time (timestampUs) and save frame data.
+            LOGV("dataCallbackTimestamp timelapse: initial frame");
+
+            mLastTimeLapseFrameRealTimestampUs = timestampUs;
+        } else if (timestampUs <
+                (mLastTimeLapseFrameRealTimestampUs + mTimeBetweenTimeLapseFrameCaptureUs)) {
+            // Skip all frames from last encoded frame until
+            // sufficient time (mTimeBetweenTimeLapseFrameCaptureUs) has passed.
+            // Tell the camera to release its recording frame and return.
+            LOGV("dataCallbackTimestamp timelapse: skipping intermediate frame");
+
+            releaseOneRecordingFrame(data);
+            return;
+        } else {
+            // Desired frame has arrived after mTimeBetweenTimeLapseFrameCaptureUs time:
+            // - Reset mLastTimeLapseFrameRealTimestampUs to current time.
+            // - Artificially modify timestampUs to be one frame time (1/framerate) ahead
+            // of the last encoded frame's time stamp.
+            LOGV("dataCallbackTimestamp timelapse: got timelapse frame");
+
+            mLastTimeLapseFrameRealTimestampUs = timestampUs;
+            timestampUs = mLastFrameTimestampUs + mTimeBetweenTimeLapseVideoFramesUs;
+        }
+    }
+
     mLastFrameTimestampUs = timestampUs;
     if (mNumFramesReceived == 0) {
         mFirstFrameTimeUs = timestampUs;
diff --git a/media/libstagefright/NuHTTPDataSource.cpp b/media/libstagefright/NuHTTPDataSource.cpp
index ab9285d..332bab3 100644
--- a/media/libstagefright/NuHTTPDataSource.cpp
+++ b/media/libstagefright/NuHTTPDataSource.cpp
@@ -42,7 +42,7 @@
         path->setTo(slashPos);
     }
 
-    char *colonPos = strchr(host->string(), ':');
+    const char *colonPos = strchr(host->string(), ':');
 
     if (colonPos != NULL) {
         unsigned long x;
diff --git a/media/libstagefright/httplive/M3UParser.cpp b/media/libstagefright/httplive/M3UParser.cpp
index edd8648..17771c4 100644
--- a/media/libstagefright/httplive/M3UParser.cpp
+++ b/media/libstagefright/httplive/M3UParser.cpp
@@ -90,7 +90,7 @@
         out->setTo(baseURL);
         out->append(url);
     } else {
-        char *slashPos = strrchr(baseURL, '/');
+        const char *slashPos = strrchr(baseURL, '/');
 
         if (slashPos > &baseURL[6]) {
             out->setTo(baseURL, slashPos - baseURL);
diff --git a/media/libstagefright/rtsp/ARTSPConnection.cpp b/media/libstagefright/rtsp/ARTSPConnection.cpp
index e9162c0..9826990 100644
--- a/media/libstagefright/rtsp/ARTSPConnection.cpp
+++ b/media/libstagefright/rtsp/ARTSPConnection.cpp
@@ -116,7 +116,7 @@
         path->setTo(slashPos);
     }
 
-    char *colonPos = strchr(host->c_str(), ':');
+    const char *colonPos = strchr(host->c_str(), ':');
 
     if (colonPos != NULL) {
         unsigned long x;
diff --git a/media/libstagefright/rtsp/ASessionDescription.cpp b/media/libstagefright/rtsp/ASessionDescription.cpp
index ca4c55e..25b9ce2 100644
--- a/media/libstagefright/rtsp/ASessionDescription.cpp
+++ b/media/libstagefright/rtsp/ASessionDescription.cpp
@@ -164,7 +164,7 @@
     AString format;
     getFormat(index, &format);
 
-    char *lastSpacePos = strrchr(format.c_str(), ' ');
+    const char *lastSpacePos = strrchr(format.c_str(), ' ');
     CHECK(lastSpacePos != NULL);
 
     char *end;
diff --git a/media/libstagefright/rtsp/MyHandler.h b/media/libstagefright/rtsp/MyHandler.h
index 74bb798..719ebf3 100644
--- a/media/libstagefright/rtsp/MyHandler.h
+++ b/media/libstagefright/rtsp/MyHandler.h
@@ -419,7 +419,7 @@
             out->setTo(baseURL);
             out->append(url);
         } else {
-            char *slashPos = strrchr(baseURL, '/');
+            const char *slashPos = strrchr(baseURL, '/');
 
             if (slashPos > &baseURL[6]) {
                 out->setTo(baseURL, slashPos - baseURL);
diff --git a/media/mtp/Android.mk b/media/mtp/Android.mk
new file mode 100644
index 0000000..40adf18
--- /dev/null
+++ b/media/mtp/Android.mk
@@ -0,0 +1,48 @@
+#
+# Copyright (C) 2010 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.
+#
+
+ifneq ($(TARGET_SIMULATOR),true)
+
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:=                                       \
+                  MtpClient.cpp                         \
+                  MtpCursor.cpp                         \
+                  MtpDataPacket.cpp                     \
+                  MtpDebug.cpp                          \
+                  MtpDevice.cpp                         \
+                  MtpEventPacket.cpp                    \
+                  MtpDeviceInfo.cpp                     \
+                  MtpObjectInfo.cpp                     \
+                  MtpPacket.cpp                         \
+                  MtpProperty.cpp                       \
+                  MtpRequestPacket.cpp                  \
+                  MtpResponsePacket.cpp                 \
+                  MtpServer.cpp                         \
+                  MtpStorageInfo.cpp                    \
+                  MtpStringBuffer.cpp                   \
+                  MtpStorage.cpp                        \
+                  MtpUtils.cpp                          \
+
+LOCAL_MODULE:= libmtp
+
+LOCAL_CFLAGS := -DMTP_DEVICE -DMTP_HOST
+
+include $(BUILD_STATIC_LIBRARY)
+
+endif
diff --git a/media/mtp/MtpClient.cpp b/media/mtp/MtpClient.cpp
new file mode 100644
index 0000000..b4c47af
--- /dev/null
+++ b/media/mtp/MtpClient.cpp
@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpClient"
+
+#include "MtpDebug.h"
+#include "MtpClient.h"
+#include "MtpDevice.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <utils/threads.h>
+
+#include <usbhost/usbhost.h>
+#include <linux/version.h>
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
+#include <linux/usb/ch9.h>
+#else
+#include <linux/usb_ch9.h>
+#endif
+
+namespace android {
+
+class MtpClientThread : public Thread {
+private:
+    MtpClient*   mClient;
+
+public:
+    MtpClientThread(MtpClient* client)
+        : mClient(client)
+    {
+    }
+
+    virtual bool threadLoop() {
+        return mClient->threadLoop();
+    }
+};
+
+
+MtpClient::MtpClient()
+    :   mThread(NULL),
+        mUsbHostContext(NULL),
+        mDone(false)
+{
+}
+
+MtpClient::~MtpClient() {
+    usb_host_cleanup(mUsbHostContext);
+}
+
+bool MtpClient::start() {
+    if (mThread)
+        return true;
+
+    mUsbHostContext = usb_host_init();
+    if (!mUsbHostContext)
+        return false;
+
+    mThread = new MtpClientThread(this);
+    mThread->run("MtpClientThread");
+
+    return true;
+}
+
+void MtpClient::stop() {
+    mDone = true;
+}
+
+bool MtpClient::usbDeviceAdded(const char *devname) {
+    struct usb_descriptor_header* desc;
+    struct usb_descriptor_iter iter;
+
+    struct usb_device *device = usb_device_open(devname);
+    if (!device) {
+        LOGE("usb_device_open failed\n");
+        return mDone;
+    }
+
+    usb_descriptor_iter_init(device, &iter);
+
+    while ((desc = usb_descriptor_iter_next(&iter)) != NULL) {
+        if (desc->bDescriptorType == USB_DT_INTERFACE) {
+            struct usb_interface_descriptor *interface = (struct usb_interface_descriptor *)desc;
+
+            if (interface->bInterfaceClass == USB_CLASS_STILL_IMAGE &&
+                interface->bInterfaceSubClass == 1 && // Still Image Capture
+                interface->bInterfaceProtocol == 1)     // Picture Transfer Protocol (PIMA 15470)
+            {
+                LOGD("Found camera: \"%s\" \"%s\"\n", usb_device_get_manufacturer_name(device),
+                        usb_device_get_product_name(device));
+
+                // interface should be followed by three endpoints
+                struct usb_endpoint_descriptor *ep;
+                struct usb_endpoint_descriptor *ep_in_desc = NULL;
+                struct usb_endpoint_descriptor *ep_out_desc = NULL;
+                struct usb_endpoint_descriptor *ep_intr_desc = NULL;
+                for (int i = 0; i < 3; i++) {
+                    ep = (struct usb_endpoint_descriptor *)usb_descriptor_iter_next(&iter);
+                    if (!ep || ep->bDescriptorType != USB_DT_ENDPOINT) {
+                        LOGE("endpoints not found\n");
+                        return mDone;
+                    }
+                    if (ep->bmAttributes == USB_ENDPOINT_XFER_BULK) {
+                        if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
+                            ep_in_desc = ep;
+                        else
+                            ep_out_desc = ep;
+                    } else if (ep->bmAttributes == USB_ENDPOINT_XFER_INT &&
+                        ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
+                        ep_intr_desc = ep;
+                    }
+                }
+                if (!ep_in_desc || !ep_out_desc || !ep_intr_desc) {
+                    LOGE("endpoints not found\n");
+                    return mDone;
+                }
+
+                struct usb_endpoint *ep_in = usb_endpoint_open(device, ep_in_desc);
+                struct usb_endpoint *ep_out = usb_endpoint_open(device, ep_out_desc);
+                struct usb_endpoint *ep_intr = usb_endpoint_open(device, ep_intr_desc);
+
+                if (usb_device_claim_interface(device, interface->bInterfaceNumber)) {
+                    LOGE("usb_device_claim_interface failed\n");
+                    usb_endpoint_close(ep_in);
+                    usb_endpoint_close(ep_out);
+                    usb_endpoint_close(ep_intr);
+                    return mDone;
+                }
+
+                MtpDevice* mtpDevice = new MtpDevice(device, interface->bInterfaceNumber,
+                            ep_in, ep_out, ep_intr);
+                mDeviceList.add(mtpDevice);
+                mtpDevice->initialize();
+                deviceAdded(mtpDevice);
+                return mDone;
+            }
+        }
+    }
+
+    usb_device_close(device);
+    return mDone;
+}
+
+MtpDevice* MtpClient::getDevice(int id) {
+    for (int i = 0; i < mDeviceList.size(); i++) {
+        MtpDevice* device = mDeviceList[i];
+        if (device->getID() == id)
+            return device;
+    }
+    return NULL;
+}
+
+bool MtpClient::usbDeviceRemoved(const char *devname) {
+    for (int i = 0; i < mDeviceList.size(); i++) {
+        MtpDevice* device = mDeviceList[i];
+        if (!strcmp(devname, device->getDeviceName())) {
+            deviceRemoved(device);
+            mDeviceList.removeAt(i);
+            delete device;
+            LOGD("Camera removed!\n");
+            break;
+        }
+    }
+    return mDone;
+}
+
+bool MtpClient::threadLoop() {
+    usb_host_run(mUsbHostContext, usb_device_added, usb_device_removed, this);
+    return false;
+}
+
+int MtpClient::usb_device_added(const char *devname, void* client_data) {
+    LOGD("usb_device_added %s\n", devname);
+    return ((MtpClient *)client_data)->usbDeviceAdded(devname);
+}
+
+int MtpClient::usb_device_removed(const char *devname, void* client_data) {
+    LOGD("usb_device_removed %s\n", devname);
+    return ((MtpClient *)client_data)->usbDeviceRemoved(devname);
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpClient.h b/media/mtp/MtpClient.h
new file mode 100644
index 0000000..907a80b
--- /dev/null
+++ b/media/mtp/MtpClient.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2010 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 _MTP_CLIENT_H
+#define _MTP_CLIENT_H
+
+#include "MtpTypes.h"
+
+struct usb_host_context;
+
+namespace android {
+
+class MtpClientThread;
+
+class MtpClient {
+private:
+    MtpDeviceList               mDeviceList;
+    MtpClientThread*            mThread;
+    struct usb_host_context*    mUsbHostContext;
+    bool                        mDone;
+
+public:
+                            MtpClient();
+    virtual                 ~MtpClient();
+
+    bool                    start();
+    void                    stop();
+
+    inline MtpDeviceList&   getDeviceList() { return mDeviceList; }
+    MtpDevice*              getDevice(int id);
+
+
+    virtual void            deviceAdded(MtpDevice *device) = 0;
+    virtual void            deviceRemoved(MtpDevice *device) = 0;
+
+private:
+    // these return true if we should stop monitoring USB and clean up
+    bool                    usbDeviceAdded(const char *devname);
+    bool                    usbDeviceRemoved(const char *devname);
+
+    friend class MtpClientThread;
+    bool                    threadLoop();
+    static int              usb_device_added(const char *devname, void* client_data);
+    static int              usb_device_removed(const char *devname, void* client_data);
+};
+
+}; // namespace android
+
+#endif // _MTP_CLIENT_H
diff --git a/media/mtp/MtpCursor.cpp b/media/mtp/MtpCursor.cpp
new file mode 100644
index 0000000..5b6672a
--- /dev/null
+++ b/media/mtp/MtpCursor.cpp
@@ -0,0 +1,454 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpCursor"
+
+#include "MtpDebug.h"
+#include "MtpClient.h"
+#include "MtpCursor.h"
+#include "MtpDevice.h"
+#include "MtpDeviceInfo.h"
+#include "MtpObjectInfo.h"
+#include "MtpStorageInfo.h"
+
+
+#include "binder/CursorWindow.h"
+
+namespace android {
+
+/* Device Column IDs */
+/* These must match the values in MtpCursor.java */
+#define DEVICE_ROW_ID           1
+#define DEVICE_MANUFACTURER     2
+#define DEVICE_MODEL            3
+
+/* Storage Column IDs */
+/* These must match the values in MtpCursor.java */
+#define STORAGE_ROW_ID          101
+#define STORAGE_IDENTIFIER      102
+#define STORAGE_DESCRIPTION     103
+
+/* Object Column IDs */
+/* These must match the values in MtpCursor.java */
+#define OBJECT_ROW_ID               201
+#define OBJECT_STORAGE_ID           202
+#define OBJECT_FORMAT               203
+#define OBJECT_PROTECTION_STATUS    204
+#define OBJECT_SIZE                 205
+#define OBJECT_THUMB_FORMAT         206
+#define OBJECT_THUMB_SIZE           207
+#define OBJECT_THUMB_WIDTH          208
+#define OBJECT_THUMB_HEIGHT         209
+#define OBJECT_IMAGE_WIDTH          210
+#define OBJECT_IMAGE_HEIGHT         211
+#define OBJECT_IMAGE_DEPTH          212
+#define OBJECT_PARENT               213
+#define OBJECT_ASSOCIATION_TYPE     214
+#define OBJECT_ASSOCIATION_DESC     215
+#define OBJECT_SEQUENCE_NUMBER      216
+#define OBJECT_NAME                 217
+#define OBJECT_DATE_CREATED         218
+#define OBJECT_DATE_MODIFIED        219
+#define OBJECT_KEYWORDS             220
+#define OBJECT_THUMB                221
+
+MtpCursor::MtpCursor(MtpClient* client, int queryType, int deviceID,
+                int storageID, int objectID, int columnCount, int* columns)
+        :   mClient(client),
+            mQueryType(queryType),
+            mDeviceID(deviceID),
+            mStorageID(storageID),
+            mQbjectID(objectID),
+            mColumnCount(columnCount),
+            mColumns(NULL)
+{
+    if (columns) {
+        mColumns = new int[columnCount];
+        memcpy(mColumns, columns, columnCount * sizeof(int));
+    }
+}
+
+MtpCursor::~MtpCursor() {
+    delete[] mColumns;
+}
+
+int MtpCursor::fillWindow(CursorWindow* window, int startPos) {
+    LOGD("MtpCursor::fillWindow mQueryType: %d\n", mQueryType);
+
+    switch (mQueryType) {
+        case DEVICE:
+            return fillDevices(window, startPos);
+        case DEVICE_ID:
+            return fillDevice(window, startPos);
+        case STORAGE:
+            return fillStorages(window, startPos);
+        case STORAGE_ID:
+            return fillStorage(window, startPos);
+        case OBJECT:
+            return fillObjects(window, 0, startPos);
+        case OBJECT_ID:
+            return fillObject(window, startPos);
+        case STORAGE_CHILDREN:
+            return fillObjects(window, -1, startPos);
+        case OBJECT_CHILDREN:
+            return fillObjects(window, mQbjectID, startPos);
+        default:
+            LOGE("MtpCursor::fillWindow: unknown query type %d\n", mQueryType);
+            return 0;
+    }
+}
+
+int MtpCursor::fillDevices(CursorWindow* window, int startPos) {
+    int count = 0;
+    MtpDeviceList& deviceList = mClient->getDeviceList();
+    for (int i = 0; i < deviceList.size(); i++) {
+        MtpDevice* device = deviceList[i];
+        if (fillDevice(window, device, startPos)) {
+            count++;
+            startPos++;
+        } else {
+            break;
+        }
+    }
+    return count;
+}
+
+int MtpCursor::fillDevice(CursorWindow* window, int startPos) {
+    MtpDevice* device = mClient->getDevice(mDeviceID);
+    if (device && fillDevice(window, device, startPos))
+        return 1;
+    else
+        return 0;
+}
+
+int MtpCursor::fillStorages(CursorWindow* window, int startPos) {
+    int count = 0;
+    MtpDevice* device = mClient->getDevice(mDeviceID);
+    if (!device)
+        return 0;
+    MtpStorageIDList* storageIDs = device->getStorageIDs();
+    if (!storageIDs)
+        return 0;
+
+    for (int i = 0; i < storageIDs->size(); i++) {
+        MtpStorageID storageID = (*storageIDs)[i];
+        if (fillStorage(window, device, storageID, startPos)) {
+            count++;
+            startPos++;
+        } else {
+            break;
+        }
+    }
+    delete storageIDs;
+    return count;
+}
+
+int MtpCursor::fillStorage(CursorWindow* window, int startPos) {
+    MtpDevice* device = mClient->getDevice(mDeviceID);
+    if (device && fillStorage(window, device, mStorageID, startPos))
+        return 1;
+    else
+        return 0;
+}
+
+int MtpCursor::fillObjects(CursorWindow* window, int parent, int startPos) {
+    int count = 0;
+    MtpDevice* device = mClient->getDevice(mDeviceID);
+    if (!device)
+        return 0;
+    MtpObjectHandleList* handles = device->getObjectHandles(mStorageID, 0, parent);
+    if (!handles)
+        return 0;
+
+    for (int i = 0; i < handles->size(); i++) {
+        MtpObjectHandle handle = (*handles)[i];
+        if (fillObject(window, device, handle, startPos)) {
+            count++;
+            startPos++;
+        } else {
+            break;
+        }
+    }
+    delete handles;
+    return count;
+}
+
+int MtpCursor::fillObject(CursorWindow* window, int startPos) {
+    MtpDevice* device = mClient->getDevice(mDeviceID);
+    if (device && fillObject(window, device, mQbjectID, startPos))
+        return 1;
+    else
+        return 0;
+}
+
+bool MtpCursor::fillDevice(CursorWindow* window, MtpDevice* device, int row) {
+    MtpDeviceInfo* deviceInfo = device->getDeviceInfo();
+    if (!deviceInfo)
+        return false;
+    if (!prepareRow(window))
+        return false;
+
+    for (int i = 0; i < mColumnCount; i++) {
+        switch (mColumns[i]) {
+            case DEVICE_ROW_ID:
+                if (!putLong(window, device->getID(), row, i))
+                    return false;
+                 break;
+            case DEVICE_MANUFACTURER:
+                if (!putString(window, deviceInfo->mManufacturer, row, i))
+                    return false;
+                 break;
+            case DEVICE_MODEL:
+                if (!putString(window, deviceInfo->mModel, row, i))
+                    return false;
+                 break;
+            default:
+                LOGE("fillDevice: unknown column %d\n", mColumns[i]);
+                return false;
+        }
+    }
+
+    return true;
+}
+
+bool MtpCursor::fillStorage(CursorWindow* window, MtpDevice* device,
+        MtpStorageID storageID, int row) {
+
+LOGD("fillStorage %d\n", storageID);
+
+    MtpStorageInfo* storageInfo = device->getStorageInfo(storageID);
+    if (!storageInfo)
+        return false;
+    if (!prepareRow(window)) {
+        delete storageInfo;
+        return false;
+    }
+
+    const char* text;
+    for (int i = 0; i < mColumnCount; i++) {
+        switch (mColumns[i]) {
+            case STORAGE_ROW_ID:
+                if (!putLong(window, storageID, row, i))
+                    goto fail;
+                 break;
+            case STORAGE_IDENTIFIER:
+                text = storageInfo->mVolumeIdentifier;
+                if (!text || !text[0])
+                    text = "Camera Storage";
+                if (!putString(window, text, row, i))
+                    goto fail;
+                 break;
+            case STORAGE_DESCRIPTION:
+                text = storageInfo->mStorageDescription;
+                if (!text || !text[0])
+                    text = "Storage Description";
+                if (!putString(window, text, row, i))
+                    goto fail;
+                 break;
+            default:
+                LOGE("fillStorage: unknown column %d\n", mColumns[i]);
+                goto fail;
+        }
+    }
+
+    delete storageInfo;
+    return true;
+
+fail:
+    delete storageInfo;
+    return false;
+}
+
+bool MtpCursor::fillObject(CursorWindow* window, MtpDevice* device,
+        MtpObjectHandle objectID, int row) {
+
+    MtpObjectInfo* objectInfo = device->getObjectInfo(objectID);
+    if (!objectInfo)
+        return false;
+    // objectInfo->print();
+    if (!prepareRow(window)) {
+        delete objectInfo;
+        return false;
+    }
+
+    for (int i = 0; i < mColumnCount; i++) {
+        switch (mColumns[i]) {
+            case OBJECT_ROW_ID:
+                if (!putLong(window, objectID, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_STORAGE_ID:
+                if (!putLong(window, objectInfo->mStorageID, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_FORMAT:
+                if (!putLong(window, objectInfo->mFormat, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_PROTECTION_STATUS:
+                if (!putLong(window, objectInfo->mProtectionStatus, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_SIZE:
+                if (!putLong(window, objectInfo->mCompressedSize, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_THUMB_FORMAT:
+                if (!putLong(window, objectInfo->mThumbFormat, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_THUMB_SIZE:
+                if (!putLong(window, objectInfo->mThumbCompressedSize, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_THUMB_WIDTH:
+                if (!putLong(window, objectInfo->mThumbPixWidth, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_THUMB_HEIGHT:
+                if (!putLong(window, objectInfo->mThumbPixHeight, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_IMAGE_WIDTH:
+                if (!putLong(window, objectInfo->mImagePixWidth, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_IMAGE_HEIGHT:
+                if (!putLong(window, objectInfo->mImagePixHeight, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_IMAGE_DEPTH:
+                if (!putLong(window, objectInfo->mImagePixDepth, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_PARENT:
+                if (!putLong(window, objectInfo->mParent, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_ASSOCIATION_TYPE:
+                if (!putLong(window, objectInfo->mAssociationType, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_ASSOCIATION_DESC:
+                if (!putLong(window, objectInfo->mAssociationDesc, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_SEQUENCE_NUMBER:
+                if (!putLong(window, objectInfo->mSequenceNumber, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_NAME:
+                if (!putString(window, objectInfo->mName, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_DATE_CREATED:
+                if (!putLong(window, objectInfo->mDateCreated, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_DATE_MODIFIED:
+                if (!putLong(window, objectInfo->mDateModified, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_KEYWORDS:
+                if (!putString(window, objectInfo->mKeywords, row, i))
+                    goto fail;
+                 break;
+            case OBJECT_THUMB:
+                if (!putThumbnail(window, objectID, row, i))
+                    goto fail;
+                break;
+            default:
+                LOGE("fillStorage: unknown column %d\n", mColumns[i]);
+                goto fail;
+        }
+    }
+
+    delete objectInfo;
+    return true;
+
+fail:
+    delete objectInfo;
+    return false;
+}
+
+bool MtpCursor::prepareRow(CursorWindow* window) {
+    if (!window->setNumColumns(mColumnCount)) {
+        LOGE("Failed to change column count from %d to %d", window->getNumColumns(), mColumnCount);
+        return false;
+    }
+    field_slot_t * fieldDir = window->allocRow();
+    if (!fieldDir) {
+        LOGE("Failed allocating fieldDir");
+        return false;
+    }
+    return true;
+}
+
+
+bool MtpCursor::putLong(CursorWindow* window, int value, int row, int column) {
+
+    if (!window->putLong(row, column, value)) {
+        window->freeLastRow();
+        LOGE("Failed allocating space for a long in column %d", column);
+        return false;
+    }
+    return true;
+}
+
+bool MtpCursor::putString(CursorWindow* window, const char* text, int row, int column) {
+    int size = strlen(text) + 1;
+    int offset = window->alloc(size);
+    if (!offset) {
+        window->freeLastRow();
+        LOGE("Failed allocating %u bytes for text/blob %s", size, text);
+        return false;
+    }
+    window->copyIn(offset, (const uint8_t*)text, size);
+
+    // This must be updated after the call to alloc(), since that
+    // may move the field around in the window
+    field_slot_t * fieldSlot = window->getFieldSlot(row, column);
+    fieldSlot->type = FIELD_TYPE_STRING;
+    fieldSlot->data.buffer.offset = offset;
+    fieldSlot->data.buffer.size = size;
+    return true;
+}
+
+bool MtpCursor::putThumbnail(CursorWindow* window, int objectID, int row, int column) {
+    MtpDevice* device = mClient->getDevice(mDeviceID);
+    int size;
+    void* thumbnail = device->getThumbnail(objectID, size);
+
+    LOGD("putThumbnail: %p, size: %d\n", thumbnail, size);
+    int offset = window->alloc(size);
+    if (!offset) {
+        window->freeLastRow();
+        LOGE("Failed allocating %u bytes for thumbnail", size);
+        return false;
+    }
+    if (size > 0)
+        window->copyIn(offset, (const uint8_t*)thumbnail, size);
+
+    // This must be updated after the call to alloc(), since that
+    // may move the field around in the window
+    field_slot_t * fieldSlot = window->getFieldSlot(row, column);
+    fieldSlot->type = FIELD_TYPE_BLOB;
+    fieldSlot->data.buffer.offset = offset;
+    fieldSlot->data.buffer.size = size;
+    return true;
+}
+
+} // namespace android
diff --git a/media/mtp/MtpCursor.h b/media/mtp/MtpCursor.h
new file mode 100644
index 0000000..d51c052
--- /dev/null
+++ b/media/mtp/MtpCursor.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2010 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 _MTP_CURSOR_H
+#define _MTP_CURSOR_H
+
+#include "MtpTypes.h"
+
+namespace android {
+
+class CursorWindow;
+
+class MtpCursor {
+private:
+    enum {
+        DEVICE              = 1,
+        DEVICE_ID           = 2,
+        STORAGE             = 3,
+        STORAGE_ID          = 4,
+        OBJECT              = 5,
+        OBJECT_ID           = 6,
+        STORAGE_CHILDREN    = 7,
+        OBJECT_CHILDREN     = 8,
+    };
+
+    MtpClient*  mClient;
+    int         mQueryType;
+    int         mDeviceID;
+    int         mStorageID;
+    int         mQbjectID;
+    int         mColumnCount;
+    int*        mColumns;
+
+public:
+                MtpCursor(MtpClient* client, int queryType, int deviceID,
+                        int storageID, int objectID, int columnCount, int* columns);
+    virtual     ~MtpCursor();
+
+    int         fillWindow(CursorWindow* window, int startPos);
+
+private:
+    int         fillDevices(CursorWindow* window, int startPos);
+    int         fillDevice(CursorWindow* window, int startPos);
+    int         fillStorages(CursorWindow* window, int startPos);
+    int         fillStorage(CursorWindow* window, int startPos);
+    int         fillObjects(CursorWindow* window, int parent, int startPos);
+    int         fillObject(CursorWindow* window, int startPos);
+
+    bool        fillDevice(CursorWindow* window, MtpDevice* device, int startPos);
+    bool        fillStorage(CursorWindow* window, MtpDevice* device,
+                        MtpStorageID storageID, int row);
+    bool        fillObject(CursorWindow* window, MtpDevice* device,
+                        MtpObjectHandle objectID, int row);
+
+    bool        prepareRow(CursorWindow* window);
+    bool        putLong(CursorWindow* window, int value, int row, int column);
+    bool        putString(CursorWindow* window, const char* text, int row, int column);
+    bool        putThumbnail(CursorWindow* window, int objectID, int row, int column);
+};
+
+}; // namespace android
+
+#endif // _MTP_CURSOR_H
diff --git a/media/mtp/MtpDataPacket.cpp b/media/mtp/MtpDataPacket.cpp
new file mode 100644
index 0000000..6f9ea24
--- /dev/null
+++ b/media/mtp/MtpDataPacket.cpp
@@ -0,0 +1,422 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpDataPacket"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include "MtpDataPacket.h"
+#include "MtpStringBuffer.h"
+
+namespace android {
+
+MtpDataPacket::MtpDataPacket()
+    :   MtpPacket(512),
+        mOffset(MTP_CONTAINER_HEADER_SIZE)
+{
+}
+
+MtpDataPacket::~MtpDataPacket() {
+}
+
+void MtpDataPacket::reset() {
+    MtpPacket::reset();
+    mOffset = MTP_CONTAINER_HEADER_SIZE;
+}
+
+void MtpDataPacket::setOperationCode(MtpOperationCode code) {
+    MtpPacket::putUInt16(MTP_CONTAINER_CODE_OFFSET, code);
+}
+
+void MtpDataPacket::setTransactionID(MtpTransactionID id) {
+    MtpPacket::putUInt32(MTP_CONTAINER_TRANSACTION_ID_OFFSET, id);
+}
+
+uint16_t MtpDataPacket::getUInt16() {
+    int offset = mOffset;
+    uint16_t result = (uint16_t)mBuffer[offset] | ((uint16_t)mBuffer[offset + 1] << 8);
+    mOffset += 2;
+    return result;
+}
+
+uint32_t MtpDataPacket::getUInt32() {
+    int offset = mOffset;
+    uint32_t result = (uint32_t)mBuffer[offset] | ((uint32_t)mBuffer[offset + 1] << 8) |
+           ((uint32_t)mBuffer[offset + 2] << 16)  | ((uint32_t)mBuffer[offset + 3] << 24);
+    mOffset += 4;
+    return result;
+}
+
+uint64_t MtpDataPacket::getUInt64() {
+    int offset = mOffset;
+    uint64_t result = (uint64_t)mBuffer[offset] | ((uint64_t)mBuffer[offset + 1] << 8) |
+           ((uint64_t)mBuffer[offset + 2] << 16) | ((uint64_t)mBuffer[offset + 3] << 24) |
+           ((uint64_t)mBuffer[offset + 4] << 32) | ((uint64_t)mBuffer[offset + 5] << 40) |
+           ((uint64_t)mBuffer[offset + 6] << 48)  | ((uint64_t)mBuffer[offset + 7] << 56);
+    mOffset += 8;
+    return result;
+}
+
+void MtpDataPacket::getUInt128(uint128_t& value) {
+    value[0] = getUInt32();
+    value[1] = getUInt32();
+    value[2] = getUInt32();
+    value[3] = getUInt32();
+}
+
+void MtpDataPacket::getString(MtpStringBuffer& string)
+{
+    string.readFromPacket(this);
+}
+
+Int8List* MtpDataPacket::getAInt8() {
+    Int8List* result = new Int8List;
+    int count = getUInt32();
+    for (int i = 0; i < count; i++)
+        result->push(getInt8());
+    return result;
+}
+
+UInt8List* MtpDataPacket::getAUInt8() {
+    UInt8List* result = new UInt8List;
+    int count = getUInt32();
+    for (int i = 0; i < count; i++)
+        result->push(getUInt8());
+    return result;
+}
+
+Int16List* MtpDataPacket::getAInt16() {
+    Int16List* result = new Int16List;
+    int count = getUInt32();
+    for (int i = 0; i < count; i++)
+        result->push(getInt16());
+    return result;
+}
+
+UInt16List* MtpDataPacket::getAUInt16() {
+    UInt16List* result = new UInt16List;
+    int count = getUInt32();
+    for (int i = 0; i < count; i++)
+        result->push(getUInt16());
+    return result;
+}
+
+Int32List* MtpDataPacket::getAInt32() {
+    Int32List* result = new Int32List;
+    int count = getUInt32();
+    for (int i = 0; i < count; i++)
+        result->push(getInt32());
+    return result;
+}
+
+UInt32List* MtpDataPacket::getAUInt32() {
+    UInt32List* result = new UInt32List;
+    int count = getUInt32();
+    for (int i = 0; i < count; i++)
+        result->push(getUInt32());
+    return result;
+}
+
+Int64List* MtpDataPacket::getAInt64() {
+    Int64List* result = new Int64List;
+    int count = getUInt32();
+    for (int i = 0; i < count; i++)
+        result->push(getInt64());
+    return result;
+}
+
+UInt64List* MtpDataPacket::getAUInt64() {
+    UInt64List* result = new UInt64List;
+    int count = getUInt32();
+    for (int i = 0; i < count; i++)
+        result->push(getUInt64());
+    return result;
+}
+
+void MtpDataPacket::putInt8(int8_t value) {
+    allocate(mOffset + 1);
+    mBuffer[mOffset++] = (uint8_t)value;
+    if (mPacketSize < mOffset)
+        mPacketSize = mOffset;
+}
+
+void MtpDataPacket::putUInt8(uint8_t value) {
+    allocate(mOffset + 1);
+    mBuffer[mOffset++] = (uint8_t)value;
+    if (mPacketSize < mOffset)
+        mPacketSize = mOffset;
+}
+
+void MtpDataPacket::putInt16(int16_t value) {
+    allocate(mOffset + 2);
+    mBuffer[mOffset++] = (uint8_t)(value & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 8) & 0xFF);
+    if (mPacketSize < mOffset)
+        mPacketSize = mOffset;
+}
+
+void MtpDataPacket::putUInt16(uint16_t value) {
+    allocate(mOffset + 2);
+    mBuffer[mOffset++] = (uint8_t)(value & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 8) & 0xFF);
+    if (mPacketSize < mOffset)
+        mPacketSize = mOffset;
+}
+
+void MtpDataPacket::putInt32(int32_t value) {
+    allocate(mOffset + 4);
+    mBuffer[mOffset++] = (uint8_t)(value & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 8) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 16) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 24) & 0xFF);
+    if (mPacketSize < mOffset)
+        mPacketSize = mOffset;
+}
+
+void MtpDataPacket::putUInt32(uint32_t value) {
+    allocate(mOffset + 4);
+    mBuffer[mOffset++] = (uint8_t)(value & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 8) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 16) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 24) & 0xFF);
+    if (mPacketSize < mOffset)
+        mPacketSize = mOffset;
+}
+
+void MtpDataPacket::putInt64(int64_t value) {
+    allocate(mOffset + 8);
+    mBuffer[mOffset++] = (uint8_t)(value & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 8) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 16) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 24) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 32) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 40) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 48) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 56) & 0xFF);
+    if (mPacketSize < mOffset)
+        mPacketSize = mOffset;
+}
+
+void MtpDataPacket::putUInt64(uint64_t value) {
+    allocate(mOffset + 8);
+    mBuffer[mOffset++] = (uint8_t)(value & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 8) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 16) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 24) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 32) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 40) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 48) & 0xFF);
+    mBuffer[mOffset++] = (uint8_t)((value >> 56) & 0xFF);
+    if (mPacketSize < mOffset)
+        mPacketSize = mOffset;
+}
+
+void MtpDataPacket::putInt128(const int128_t& value) {
+    putInt32(value[0]);
+    putInt32(value[1]);
+    putInt32(value[2]);
+    putInt32(value[3]);
+}
+
+void MtpDataPacket::putUInt128(const uint128_t& value) {
+    putUInt32(value[0]);
+    putUInt32(value[1]);
+    putUInt32(value[2]);
+    putUInt32(value[3]);
+}
+
+void MtpDataPacket::putAInt8(const int8_t* values, int count) {
+    putUInt32(count);
+    for (int i = 0; i < count; i++)
+        putInt8(*values++);
+}
+
+void MtpDataPacket::putAUInt8(const uint8_t* values, int count) {
+    putUInt32(count);
+    for (int i = 0; i < count; i++)
+        putUInt8(*values++);
+}
+
+void MtpDataPacket::putAInt16(const int16_t* values, int count) {
+    putUInt32(count);
+    for (int i = 0; i < count; i++)
+        putInt16(*values++);
+}
+
+void MtpDataPacket::putAUInt16(const uint16_t* values, int count) {
+    putUInt32(count);
+    for (int i = 0; i < count; i++)
+        putUInt16(*values++);
+}
+
+void MtpDataPacket::putAInt32(const int32_t* values, int count) {
+    putUInt32(count);
+    for (int i = 0; i < count; i++)
+        putInt32(*values++);
+}
+
+void MtpDataPacket::putAUInt32(const uint32_t* values, int count) {
+    putUInt32(count);
+    for (int i = 0; i < count; i++)
+        putUInt32(*values++);
+}
+
+void MtpDataPacket::putAUInt32(const UInt32List* list) {
+    if (!list) {
+        putEmptyArray();
+    } else {
+        size_t size = list->size();
+        putUInt32(size);
+        for (size_t i = 0; i < size; i++)
+            putUInt32((*list)[i]);
+    }
+}
+
+void MtpDataPacket::putAInt64(const int64_t* values, int count) {
+    putUInt32(count);
+    for (int i = 0; i < count; i++)
+        putInt64(*values++);
+}
+
+void MtpDataPacket::putAUInt64(const uint64_t* values, int count) {
+    putUInt32(count);
+    for (int i = 0; i < count; i++)
+        putUInt64(*values++);
+}
+
+void MtpDataPacket::putString(const MtpStringBuffer& string) {
+    string.writeToPacket(this);
+}
+
+void MtpDataPacket::putString(const char* s) {
+    MtpStringBuffer string(s);
+    string.writeToPacket(this);
+}
+
+void MtpDataPacket::putString(const uint16_t* string) {
+    int count = 0;
+    for (int i = 0; i < 256; i++) {
+        if (string[i])
+            count++;
+        else
+            break;
+    }
+    putUInt8(count);
+    for (int i = 0; i < count; i++)
+        putUInt16(string[i]);
+}
+
+#ifdef MTP_DEVICE 
+int MtpDataPacket::read(int fd) {
+    // first read the header
+    int ret = ::read(fd, mBuffer, MTP_CONTAINER_HEADER_SIZE);
+    if (ret != MTP_CONTAINER_HEADER_SIZE)
+        return -1;
+    // then the following data
+    int total = MtpPacket::getUInt32(MTP_CONTAINER_LENGTH_OFFSET);
+    int remaining = total - MTP_CONTAINER_HEADER_SIZE;
+    ret = ::read(fd, &mBuffer[0] + MTP_CONTAINER_HEADER_SIZE, remaining);
+    if (ret != remaining)
+        return -1;
+
+    mPacketSize = total;
+    mOffset = MTP_CONTAINER_HEADER_SIZE;
+    return total;
+}
+
+int MtpDataPacket::readDataHeader(int fd) {
+    int ret = ::read(fd, mBuffer, MTP_CONTAINER_HEADER_SIZE);
+    if (ret > 0)
+        mPacketSize = ret;
+    else
+        mPacketSize = 0;
+    return ret;
+}
+
+int MtpDataPacket::write(int fd) {
+    MtpPacket::putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize);
+    MtpPacket::putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_DATA);
+
+    // send header separately from data
+    int ret = ::write(fd, mBuffer, MTP_CONTAINER_HEADER_SIZE);
+    if (ret == MTP_CONTAINER_HEADER_SIZE)
+        ret = ::write(fd, mBuffer + MTP_CONTAINER_HEADER_SIZE,
+                        mPacketSize - MTP_CONTAINER_HEADER_SIZE);
+    return (ret < 0 ? ret : 0);
+}
+
+int MtpDataPacket::writeDataHeader(int fd, uint32_t length) {
+    MtpPacket::putUInt32(MTP_CONTAINER_LENGTH_OFFSET, length);
+    MtpPacket::putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_DATA);
+    int ret = ::write(fd, mBuffer, MTP_CONTAINER_HEADER_SIZE);
+    return (ret < 0 ? ret : 0);
+}
+#endif // MTP_DEVICE
+
+#ifdef MTP_HOST
+int MtpDataPacket::read(struct usb_endpoint *ep) {
+    // first read the header
+    int length = transfer(ep, mBuffer, mBufferSize);
+    if (length > MTP_CONTAINER_HEADER_SIZE) {
+        // look at the length field to see if the data spans multiple packets
+        uint32_t totalLength = MtpPacket::getUInt32(MTP_CONTAINER_LENGTH_OFFSET);
+        while (totalLength > length) {
+            allocate(length + mAllocationIncrement);
+            int ret = transfer(ep, mBuffer + length, mAllocationIncrement);
+            if (ret >= 0)
+                length += ret;
+            else {
+                length = ret;
+                break;
+            }
+        }
+    }
+    if (length >= 0)
+        mPacketSize = length;
+    return length;
+}
+
+int MtpDataPacket::write(struct usb_endpoint *ep) {
+    MtpPacket::putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize);
+    MtpPacket::putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_DATA);
+
+    // send header separately from data
+    int ret = transfer(ep, mBuffer, MTP_CONTAINER_HEADER_SIZE);
+    if (ret == MTP_CONTAINER_HEADER_SIZE)
+        ret = transfer(ep, mBuffer + MTP_CONTAINER_HEADER_SIZE,
+                        mPacketSize - MTP_CONTAINER_HEADER_SIZE);
+    return (ret < 0 ? ret : 0);
+}
+
+#endif // MTP_HOST
+
+void* MtpDataPacket::getData(int& outLength) const {
+    int length = mPacketSize - MTP_CONTAINER_HEADER_SIZE;
+    if (length > 0) {
+        void* result = malloc(length);
+        if (result) {
+            memcpy(result, mBuffer + MTP_CONTAINER_HEADER_SIZE, length);
+            outLength = length;
+            return result;
+        }
+    }
+    outLength = 0;
+    return NULL;
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpDataPacket.h b/media/mtp/MtpDataPacket.h
new file mode 100644
index 0000000..759c0f9
--- /dev/null
+++ b/media/mtp/MtpDataPacket.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2010 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 _MTP_DATA_PACKET_H
+#define _MTP_DATA_PACKET_H
+
+#include "MtpPacket.h"
+#include "mtp.h"
+
+namespace android {
+
+class MtpDataPacket : public MtpPacket {
+private:
+    // current offset for get/put methods
+    int                 mOffset;
+
+public:
+                        MtpDataPacket();
+    virtual             ~MtpDataPacket();
+
+    virtual void        reset();
+
+    void                setOperationCode(MtpOperationCode code);
+    void                setTransactionID(MtpTransactionID id);
+
+    inline uint8_t      getUInt8() { return (uint8_t)mBuffer[mOffset++]; }
+    inline int8_t       getInt8() { return (int8_t)mBuffer[mOffset++]; }
+    uint16_t            getUInt16();
+    inline int16_t      getInt16() { return (int16_t)getUInt16(); }
+    uint32_t            getUInt32();
+    inline int32_t      getInt32() { return (int32_t)getUInt32(); }
+    uint64_t            getUInt64();
+    inline int64_t      getInt64() { return (int64_t)getUInt64(); }
+    void                getUInt128(uint128_t& value);
+    inline void         getInt128(int128_t& value) { getUInt128((uint128_t&)value); }
+    void                getString(MtpStringBuffer& string);
+
+    Int8List*           getAInt8();
+    UInt8List*          getAUInt8();
+    Int16List*          getAInt16();
+    UInt16List*         getAUInt16();
+    Int32List*          getAInt32();
+    UInt32List*         getAUInt32();
+    Int64List*          getAInt64();
+    UInt64List*         getAUInt64();
+
+    void                putInt8(int8_t value);
+    void                putUInt8(uint8_t value);
+    void                putInt16(int16_t value);
+    void                putUInt16(uint16_t value);
+    void                putInt32(int32_t value);
+    void                putUInt32(uint32_t value);
+    void                putInt64(int64_t value);
+    void                putUInt64(uint64_t value);
+    void                putInt128(const int128_t& value);
+    void                putUInt128(const uint128_t& value);
+
+    void                putAInt8(const int8_t* values, int count);
+    void                putAUInt8(const uint8_t* values, int count);
+    void                putAInt16(const int16_t* values, int count);
+    void                putAUInt16(const uint16_t* values, int count);
+    void                putAInt32(const int32_t* values, int count);
+    void                putAUInt32(const uint32_t* values, int count);
+    void                putAUInt32(const UInt32List* list);
+    void                putAInt64(const int64_t* values, int count);
+    void                putAUInt64(const uint64_t* values, int count);
+    void                putString(const MtpStringBuffer& string);
+    void                putString(const char* string);
+    void                putString(const uint16_t* string);
+    inline void         putEmptyString() { putUInt16(0); }
+    inline void         putEmptyArray() { putUInt32(0); }
+
+
+#ifdef MTP_DEVICE
+    // fill our buffer with data from the given file descriptor
+    int                 read(int fd);
+    int                 readDataHeader(int fd);
+
+    // write our data to the given file descriptor
+    int                 write(int fd);
+    int                 writeDataHeader(int fd, uint32_t length);
+#endif
+
+#ifdef MTP_HOST
+    int                 read(struct usb_endpoint *ep);
+    int                 write(struct usb_endpoint *ep);
+#endif
+
+    inline bool         hasData() const { return mPacketSize > MTP_CONTAINER_HEADER_SIZE; }
+    void*               getData(int& outLength) const;
+};
+
+}; // namespace android
+
+#endif // _MTP_DATA_PACKET_H
diff --git a/media/mtp/MtpDatabase.h b/media/mtp/MtpDatabase.h
new file mode 100644
index 0000000..7feb3dc
--- /dev/null
+++ b/media/mtp/MtpDatabase.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2010 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 _MTP_DATABASE_H
+#define _MTP_DATABASE_H
+
+#include "MtpTypes.h"
+
+namespace android {
+
+class MtpDataPacket;
+
+class MtpDatabase {
+public:
+    virtual ~MtpDatabase() {}
+
+    // called from SendObjectInfo to reserve a database entry for the incoming file
+    virtual MtpObjectHandle         beginSendObject(const char* path,
+                                            MtpObjectFormat format,
+                                            MtpObjectHandle parent,
+                                            MtpStorageID storage,
+                                            uint64_t size,
+                                            time_t modified) = 0;
+
+    // called to report success or failure of the SendObject file transfer
+    // success should signal a notification of the new object's creation,
+    // failure should remove the database entry created in beginSendObject
+    virtual void                    endSendObject(const char* path,
+                                            MtpObjectHandle handle,
+                                            MtpObjectFormat format,
+                                            bool succeeded) = 0;
+
+    virtual MtpObjectHandleList*    getObjectList(MtpStorageID storageID,
+                                            MtpObjectFormat format,
+                                            MtpObjectHandle parent) = 0;
+
+    virtual MtpResponseCode         getObjectProperty(MtpObjectHandle handle,
+                                            MtpObjectProperty property,
+                                            MtpDataPacket& packet) = 0;
+
+    virtual MtpResponseCode         getObjectInfo(MtpObjectHandle handle,
+                                            MtpDataPacket& packet) = 0;
+
+    virtual bool                    getObjectFilePath(MtpObjectHandle handle,
+                                            MtpString& filePath,
+                                            int64_t& fileLength) = 0;
+    virtual bool                    deleteFile(MtpObjectHandle handle) = 0;
+
+    virtual void                    beginTransaction() = 0;
+    virtual void                    commitTransaction() = 0;
+    virtual void                    rollbackTransaction() = 0;
+};
+
+}; // namespace android
+
+#endif // _MTP_DATABASE_H
diff --git a/media/mtp/MtpDebug.cpp b/media/mtp/MtpDebug.cpp
new file mode 100644
index 0000000..9ded6e2
--- /dev/null
+++ b/media/mtp/MtpDebug.cpp
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2010 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 "MtpDebug.h"
+
+namespace android {
+
+struct OperationCodeEntry {
+    const char* name;
+    MtpOperationCode code;
+};
+
+static const OperationCodeEntry sOperationCodes[] = {
+    { "MTP_OPERATION_GET_DEVICE_INFO",              0x1001 },
+    { "MTP_OPERATION_OPEN_SESSION",                 0x1002 },
+    { "MTP_OPERATION_CLOSE_SESSION",                0x1003 },
+    { "MTP_OPERATION_GET_STORAGE_IDS",              0x1004 },
+    { "MTP_OPERATION_GET_STORAGE_INFO",             0x1005 },
+    { "MTP_OPERATION_GET_NUM_OBJECTS",              0x1006 },
+    { "MTP_OPERATION_GET_OBJECT_HANDLES",           0x1007 },
+    { "MTP_OPERATION_GET_OBJECT_INFO",              0x1008 },
+    { "MTP_OPERATION_GET_OBJECT",                   0x1009 },
+    { "MTP_OPERATION_GET_THUMB",                    0x100A },
+    { "MTP_OPERATION_DELETE_OBJECT",                0x100B },
+    { "MTP_OPERATION_SEND_OBJECT_INFO",             0x100C },
+    { "MTP_OPERATION_SEND_OBJECT",                  0x100D },
+    { "MTP_OPERATION_INITIATE_CAPTURE",             0x100E },
+    { "MTP_OPERATION_FORMAT_STORE",                 0x100F },
+    { "MTP_OPERATION_RESET_DEVICE",                 0x1010 },
+    { "MTP_OPERATION_SELF_TEST",                    0x1011 },
+    { "MTP_OPERATION_SET_OBJECT_PROTECTION",        0x1012 },
+    { "MTP_OPERATION_POWER_DOWN",                   0x1013 },
+    { "MTP_OPERATION_GET_DEVICE_PROP_DESC",         0x1014 },
+    { "MTP_OPERATION_GET_DEVICE_PROP_VALUE",        0x1015 },
+    { "MTP_OPERATION_SET_DEVICE_PROP_VALUE",        0x1016 },
+    { "MTP_OPERATION_RESET_DEVICE_PROP_VALUE",      0x1017 },
+    { "MTP_OPERATION_TERMINATE_OPEN_CAPTURE",       0x1018 },
+    { "MTP_OPERATION_MOVE_OBJECT",                  0x1019 },
+    { "MTP_OPERATION_COPY_OBJECT",                  0x101A },
+    { "MTP_OPERATION_GET_PARTIAL_OBJECT",           0x101B },
+    { "MTP_OPERATION_INITIATE_OPEN_CAPTURE",        0x101C },
+    { "MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED",   0x9801 },
+    { "MTP_OPERATION_GET_OBJECT_PROP_DESC",         0x9802 },
+    { "MTP_OPERATION_GET_OBJECT_PROP_VALUE",        0x9803 },
+    { "MTP_OPERATION_SET_OBJECT_PROP_VALUE",        0x9804 },
+    { "MTP_OPERATION_GET_OBJECT_REFERENCES",        0x9810 },
+    { "MTP_OPERATION_SET_OBJECT_REFERENCES",        0x9811 },
+    { "MTP_OPERATION_SKIP",                         0x9820 },
+    { 0,                                            0      },
+};
+
+
+const char* MtpDebug::getOperationCodeName(MtpOperationCode code) {
+    const OperationCodeEntry* entry = sOperationCodes;
+    while (entry->name) {
+        if (entry->code == code)
+            return entry->name;
+        entry++;
+    }
+    return "*** UNKNOWN OPERATION ***";
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpDebug.h b/media/mtp/MtpDebug.h
new file mode 100644
index 0000000..86f601a
--- /dev/null
+++ b/media/mtp/MtpDebug.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2010 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 _MTP_DEBUG_H
+#define _MTP_DEBUG_H
+
+#define LOG_NDEBUG 0
+#include <utils/Log.h>
+
+#include "MtpTypes.h"
+
+namespace android {
+
+class MtpDebug {
+public:
+    static const char* getOperationCodeName(MtpOperationCode code);
+};
+
+}; // namespace android
+
+#endif // _MTP_DEBUG_H
diff --git a/media/mtp/MtpDevice.cpp b/media/mtp/MtpDevice.cpp
new file mode 100644
index 0000000..3ceb9b4
--- /dev/null
+++ b/media/mtp/MtpDevice.cpp
@@ -0,0 +1,301 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpDevice"
+
+#include "MtpDebug.h"
+#include "MtpDevice.h"
+#include "MtpDeviceInfo.h"
+#include "MtpObjectInfo.h"
+#include "MtpProperty.h"
+#include "MtpStorageInfo.h"
+#include "MtpStringBuffer.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <usbhost/usbhost.h>
+
+namespace android {
+
+MtpDevice::MtpDevice(struct usb_device* device, int interface,
+            struct usb_endpoint *ep_in, struct usb_endpoint *ep_out,
+            struct usb_endpoint *ep_intr)
+    :   mDevice(device),
+        mInterface(interface),
+        mEndpointIn(ep_in),
+        mEndpointOut(ep_out),
+        mEndpointIntr(ep_intr),
+        mDeviceInfo(NULL),
+        mID(usb_device_get_unique_id(device)),
+        mSessionID(0),
+        mTransactionID(0)
+{
+}
+
+MtpDevice::~MtpDevice() {
+    close();
+    for (int i = 0; i < mDeviceProperties.size(); i++)
+        delete mDeviceProperties[i];
+}
+
+void MtpDevice::initialize() {
+    openSession();
+    mDeviceInfo = getDeviceInfo();
+    if (mDeviceInfo) {
+        mDeviceInfo->print();
+
+        if (mDeviceInfo->mDeviceProperties) {
+            int count = mDeviceInfo->mDeviceProperties->size();
+            for (int i = 0; i < count; i++) {
+                MtpDeviceProperty propCode = (*mDeviceInfo->mDeviceProperties)[i];
+                MtpProperty* property = getDevicePropDesc(propCode);
+                if (property) {
+                    property->print();
+                    mDeviceProperties.push(property);
+                }
+            }
+        }
+    }
+}
+
+void MtpDevice::close() {
+    if (mDevice) {
+        usb_device_release_interface(mDevice, mInterface);
+        usb_device_close(mDevice);
+        mDevice = NULL;
+    }
+}
+
+const char* MtpDevice::getDeviceName() {
+    if (mDevice)
+        return usb_device_get_name(mDevice);
+    else
+        return "???";
+}
+
+bool MtpDevice::openSession() {
+    mSessionID = 0;
+    mTransactionID = 0;
+    MtpSessionID newSession = 1;
+    mRequest.reset();
+    mRequest.setParameter(1, newSession);
+    if (!sendRequest(MTP_OPERATION_OPEN_SESSION))
+        return false;
+    MtpResponseCode ret = readResponse();
+    if (ret == MTP_RESPONSE_SESSION_ALREADY_OPEN)
+        newSession = mResponse.getParameter(1);
+    else if (ret != MTP_RESPONSE_OK)
+        return false;
+
+    mSessionID = newSession;
+    mTransactionID = 1;
+    return true;
+}
+
+bool MtpDevice::closeSession() {
+    // FIXME
+    return true;
+}
+
+MtpDeviceInfo* MtpDevice::getDeviceInfo() {
+    mRequest.reset();
+    if (!sendRequest(MTP_OPERATION_GET_DEVICE_INFO))
+        return NULL;
+    if (!readData())
+        return NULL;
+    MtpResponseCode ret = readResponse();
+    if (ret == MTP_RESPONSE_OK) {
+        MtpDeviceInfo* info = new MtpDeviceInfo;
+        info->read(mData);
+        return info;
+    }
+    return NULL;
+}
+
+MtpStorageIDList* MtpDevice::getStorageIDs() {
+    mRequest.reset();
+    if (!sendRequest(MTP_OPERATION_GET_STORAGE_IDS))
+        return NULL;
+    if (!readData())
+        return NULL;
+    MtpResponseCode ret = readResponse();
+    if (ret == MTP_RESPONSE_OK) {
+        return mData.getAUInt32();
+    }
+    return NULL;
+}
+
+MtpStorageInfo* MtpDevice::getStorageInfo(MtpStorageID storageID) {
+    mRequest.reset();
+    mRequest.setParameter(1, storageID);
+    if (!sendRequest(MTP_OPERATION_GET_STORAGE_INFO))
+        return NULL;
+    if (!readData())
+        return NULL;
+    MtpResponseCode ret = readResponse();
+    if (ret == MTP_RESPONSE_OK) {
+        MtpStorageInfo* info = new MtpStorageInfo(storageID);
+        info->read(mData);
+        return info;
+    }
+    return NULL;
+}
+
+MtpObjectHandleList* MtpDevice::getObjectHandles(MtpStorageID storageID,
+            MtpObjectFormat format, MtpObjectHandle parent) {
+    mRequest.reset();
+    mRequest.setParameter(1, storageID);
+    mRequest.setParameter(2, format);
+    mRequest.setParameter(3, parent);
+    if (!sendRequest(MTP_OPERATION_GET_OBJECT_HANDLES))
+        return NULL;
+    if (!readData())
+        return NULL;
+    MtpResponseCode ret = readResponse();
+    if (ret == MTP_RESPONSE_OK) {
+        return mData.getAUInt32();
+    }
+    return NULL;
+}
+
+MtpObjectInfo* MtpDevice::getObjectInfo(MtpObjectHandle handle) {
+    // FIXME - we might want to add some caching here
+
+    mRequest.reset();
+    mRequest.setParameter(1, handle);
+    if (!sendRequest(MTP_OPERATION_GET_OBJECT_INFO))
+        return NULL;
+    if (!readData())
+        return NULL;
+    MtpResponseCode ret = readResponse();
+    if (ret == MTP_RESPONSE_OK) {
+        MtpObjectInfo* info = new MtpObjectInfo(handle);
+        info->read(mData);
+        return info;
+    }
+    return NULL;
+}
+
+void* MtpDevice::getThumbnail(MtpObjectHandle handle, int& outLength) {
+    mRequest.reset();
+    mRequest.setParameter(1, handle);
+    if (sendRequest(MTP_OPERATION_GET_THUMB) && readData()) {
+        MtpResponseCode ret = readResponse();
+        if (ret == MTP_RESPONSE_OK) {
+            return mData.getData(outLength);
+        }
+    }
+    outLength = 0;
+    return NULL;
+}
+
+bool MtpDevice::deleteObject(MtpObjectHandle handle) {
+    mRequest.reset();
+    mRequest.setParameter(1, handle);
+    if (sendRequest(MTP_OPERATION_DELETE_OBJECT)) {
+        MtpResponseCode ret = readResponse();
+        if (ret == MTP_RESPONSE_OK)
+            return true;
+    }
+    return false;
+}
+
+MtpObjectHandle MtpDevice::getParent(MtpObjectHandle handle) {
+    MtpObjectInfo* info = getObjectInfo(handle);
+    if (info)
+        return info->mParent;
+    else
+        return -1;
+}
+
+MtpObjectHandle MtpDevice::getStorageID(MtpObjectHandle handle) {
+    MtpObjectInfo* info = getObjectInfo(handle);
+    if (info)
+        return info->mStorageID;
+    else
+        return -1;
+}
+
+MtpProperty* MtpDevice::getDevicePropDesc(MtpDeviceProperty code) {
+    mRequest.reset();
+    mRequest.setParameter(1, code);
+    if (!sendRequest(MTP_OPERATION_GET_DEVICE_PROP_DESC))
+        return NULL;
+    if (!readData())
+        return NULL;
+    MtpResponseCode ret = readResponse();
+    if (ret == MTP_RESPONSE_OK) {
+        MtpProperty* property = new MtpProperty;
+        property->read(mData, true);
+        return property;
+    }
+    return NULL;
+}
+
+
+bool MtpDevice::sendRequest(MtpOperationCode operation) {
+    LOGD("sendRequest: %s\n", MtpDebug::getOperationCodeName(operation));
+    mRequest.setOperationCode(operation);
+    if (mTransactionID > 0)
+        mRequest.setTransactionID(mTransactionID++);
+    int ret = mRequest.write(mEndpointOut);
+    mRequest.dump();
+    return (ret > 0);
+}
+
+bool MtpDevice::sendData(MtpOperationCode operation) {
+    LOGD("sendData\n");
+    mData.setOperationCode(mRequest.getOperationCode());
+    mData.setTransactionID(mRequest.getTransactionID());
+    int ret = mData.write(mEndpointOut);
+    mData.dump();
+    return (ret > 0);
+}
+
+bool MtpDevice::readData() {
+    mData.reset();
+    int ret = mData.read(mEndpointIn);
+    LOGD("readData returned %d\n", ret);
+    if (ret >= MTP_CONTAINER_HEADER_SIZE) {
+        mData.dump();
+        return true;
+    }
+    else {
+        LOGD("readResponse failed\n");
+        return false;
+    }
+}
+
+MtpResponseCode MtpDevice::readResponse() {
+    LOGD("readResponse\n");
+    int ret = mResponse.read(mEndpointIn);
+    if (ret >= MTP_CONTAINER_HEADER_SIZE) {
+        mResponse.dump();
+        return mResponse.getResponseCode();
+    }
+    else {
+        LOGD("readResponse failed\n");
+        return -1;
+    }
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpDevice.h b/media/mtp/MtpDevice.h
new file mode 100644
index 0000000..e41a872
--- /dev/null
+++ b/media/mtp/MtpDevice.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2010 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 _MTP_DEVICE_H
+#define _MTP_DEVICE_H
+
+#include "MtpRequestPacket.h"
+#include "MtpDataPacket.h"
+#include "MtpResponsePacket.h"
+#include "MtpTypes.h"
+
+struct usb_device;
+
+namespace android {
+
+class MtpDeviceInfo;
+class MtpObjectInfo;
+class MtpStorageInfo;
+
+class MtpDevice {
+private:
+    struct usb_device*      mDevice;
+    int                     mInterface;
+    struct usb_endpoint*    mEndpointIn;
+    struct usb_endpoint*    mEndpointOut;
+    struct usb_endpoint*    mEndpointIntr;
+    MtpDeviceInfo*          mDeviceInfo;
+    MtpPropertyList         mDeviceProperties;
+
+    // a unique ID for the device
+    int                     mID;
+
+    // current session ID
+    MtpSessionID            mSessionID;
+    // current transaction ID
+    MtpTransactionID        mTransactionID;
+
+    MtpRequestPacket        mRequest;
+    MtpDataPacket           mData;
+    MtpResponsePacket       mResponse;
+
+public:
+                            MtpDevice(struct usb_device* device, int interface,
+                                    struct usb_endpoint *ep_in, struct usb_endpoint *ep_out,
+                                    struct usb_endpoint *ep_intr);
+    virtual                 ~MtpDevice();
+
+    inline int              getID() const { return mID; }
+
+    void                    initialize();
+    void                    close();
+    const char*             getDeviceName();
+
+    bool                    openSession();
+    bool                    closeSession();
+
+    MtpDeviceInfo*          getDeviceInfo();
+    MtpStorageIDList*       getStorageIDs();
+    MtpStorageInfo*         getStorageInfo(MtpStorageID storageID);
+    MtpObjectHandleList*    getObjectHandles(MtpStorageID storageID, MtpObjectFormat format, MtpObjectHandle parent);
+    MtpObjectInfo*          getObjectInfo(MtpObjectHandle handle);
+    void*                   getThumbnail(MtpObjectHandle handle, int& outLength);
+    bool                    deleteObject(MtpObjectHandle handle);
+    MtpObjectHandle         getParent(MtpObjectHandle handle);
+    MtpObjectHandle         getStorageID(MtpObjectHandle handle);
+
+    MtpProperty*            getDevicePropDesc(MtpDeviceProperty code);
+
+private:
+    bool                    sendRequest(MtpOperationCode operation);
+    bool                    sendData(MtpOperationCode operation);
+    bool                    readData();
+    MtpResponseCode         readResponse();
+
+};
+
+}; // namespace android
+
+#endif // _MTP_DEVICE_H
diff --git a/media/mtp/MtpDeviceInfo.cpp b/media/mtp/MtpDeviceInfo.cpp
new file mode 100644
index 0000000..025b8eb
--- /dev/null
+++ b/media/mtp/MtpDeviceInfo.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpDeviceInfo"
+
+#include "MtpDebug.h"
+#include "MtpDataPacket.h"
+#include "MtpDeviceInfo.h"
+#include "MtpStringBuffer.h"
+
+namespace android {
+
+MtpDeviceInfo::MtpDeviceInfo()
+    :   mStandardVersion(0),
+        mVendorExtensionID(0),
+        mVendorExtensionVersion(0),
+        mVendorExtensionDesc(NULL),
+        mFunctionalCode(0),
+        mOperations(NULL),
+        mEvents(NULL),
+        mDeviceProperties(NULL),
+        mCaptureFormats(NULL),
+        mPlaybackFormats(NULL),
+        mManufacturer(NULL),
+        mModel(NULL),
+        mVersion(NULL),
+        mSerial(NULL)
+{
+}
+
+MtpDeviceInfo::~MtpDeviceInfo() {
+    if (mVendorExtensionDesc)
+        free(mVendorExtensionDesc);
+    delete mOperations;
+    delete mEvents;
+    delete mDeviceProperties;
+    delete mCaptureFormats;
+    delete mPlaybackFormats;
+    if (mManufacturer)
+        free(mManufacturer);
+    if (mModel)
+        free(mModel);
+    if (mVersion)
+        free(mVersion);
+    if (mSerial)
+        free(mSerial);
+}
+
+void MtpDeviceInfo::read(MtpDataPacket& packet) {
+    MtpStringBuffer string;
+
+    // read the device info
+    mStandardVersion = packet.getUInt16();
+    mVendorExtensionID = packet.getUInt32();
+    mVendorExtensionVersion = packet.getUInt16();
+
+    packet.getString(string);
+    mVendorExtensionDesc = strdup((const char *)string);
+
+    mFunctionalCode = packet.getUInt16();
+    mOperations = packet.getAUInt16();
+    mEvents = packet.getAUInt16();
+    mDeviceProperties = packet.getAUInt16();
+    mCaptureFormats = packet.getAUInt16();
+    mPlaybackFormats = packet.getAUInt16();
+
+    packet.getString(string);
+    mManufacturer = strdup((const char *)string);
+    packet.getString(string);
+    mModel = strdup((const char *)string);
+    packet.getString(string);
+    mVersion = strdup((const char *)string);
+    packet.getString(string);
+    mSerial = strdup((const char *)string);
+}
+
+void MtpDeviceInfo::print() {
+    LOGD("Device Info:\n\tmStandardVersion: %d\n\tmVendorExtensionID: %d\n\tmVendorExtensionVersiony: %d\n",
+            mStandardVersion, mVendorExtensionID, mVendorExtensionVersion);
+    LOGD("\tmVendorExtensionDesc: %s\n\tmFunctionalCode: %d\n\tmManufacturer: %s\n\tmModel: %s\n\tmVersion: %s\n\tmSerial: %s\n",
+            mVendorExtensionDesc, mFunctionalCode, mManufacturer, mModel, mVersion, mSerial);
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpDeviceInfo.h b/media/mtp/MtpDeviceInfo.h
new file mode 100644
index 0000000..2abaa10
--- /dev/null
+++ b/media/mtp/MtpDeviceInfo.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2010 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 _MTP_DEVICE_INFO_H
+#define _MTP_DEVICE_INFO_H
+
+struct stat;
+
+namespace android {
+
+class MtpDataPacket;
+
+class MtpDeviceInfo {
+public:
+    uint16_t                mStandardVersion;
+    uint32_t                mVendorExtensionID;
+    uint16_t                mVendorExtensionVersion;
+    char*                   mVendorExtensionDesc;
+    uint16_t                mFunctionalCode;
+    UInt16List*             mOperations;
+    UInt16List*             mEvents;
+    MtpDevicePropertyList*  mDeviceProperties;
+    MtpObjectFormatList*    mCaptureFormats;
+    MtpObjectFormatList*    mPlaybackFormats;
+    char*                   mManufacturer;
+    char*                   mModel;
+    char*                   mVersion;
+    char*                   mSerial;
+
+public:
+                            MtpDeviceInfo();
+    virtual                 ~MtpDeviceInfo();
+
+    void                    read(MtpDataPacket& packet);
+
+    void                    print();
+};
+
+}; // namespace android
+
+#endif // _MTP_DEVICE_INFO_H
diff --git a/media/mtp/MtpEventPacket.cpp b/media/mtp/MtpEventPacket.cpp
new file mode 100644
index 0000000..089278e
--- /dev/null
+++ b/media/mtp/MtpEventPacket.cpp
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpEventPacket"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#include <linux/usb/f_mtp.h>
+
+#include "MtpEventPacket.h"
+
+namespace android {
+
+MtpEventPacket::MtpEventPacket()
+    :   MtpPacket(512)
+{
+}
+
+MtpEventPacket::~MtpEventPacket() {
+}
+
+#ifdef MTP_DEVICE
+int MtpEventPacket::write(int fd) {
+    struct mtp_event    event;
+
+    putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize);
+    putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_EVENT);
+
+    event.data = mBuffer;
+    event.length = mPacketSize;
+    int ret = ::ioctl(fd, MTP_SEND_EVENT, (unsigned long)&event);
+    return (ret < 0 ? ret : 0);
+}
+#endif
+
+#ifdef MTP_HOST
+    // read our buffer from the given endpoint
+int MtpEventPacket::read(struct usb_endpoint *ep) {
+    int ret = transfer(ep, mBuffer, mBufferSize);
+     if (ret >= 0)
+        mPacketSize = ret;
+    else
+        mPacketSize = 0;
+    return ret;
+}
+#endif
+
+}  // namespace android
+
diff --git a/media/mtp/MtpEventPacket.h b/media/mtp/MtpEventPacket.h
new file mode 100644
index 0000000..30ae869
--- /dev/null
+++ b/media/mtp/MtpEventPacket.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2010 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 _MTP_EVENT_PACKET_H
+#define _MTP_EVENT_PACKET_H
+
+#include "MtpPacket.h"
+#include "mtp.h"
+
+namespace android {
+
+class MtpEventPacket : public MtpPacket {
+
+public:
+                        MtpEventPacket();
+    virtual             ~MtpEventPacket();
+
+#ifdef MTP_DEVICE
+    // write our data to the given file descriptor
+    int                 write(int fd);
+#endif
+
+#ifdef MTP_HOST
+    // read our buffer from the given endpoint
+    int                 read(struct usb_endpoint *ep);
+#endif
+
+    inline MtpEventCode     getEventCode() const { return getContainerCode(); }
+    inline void             setEventCode(MtpEventCode code)
+                                                     { return setContainerCode(code); }
+};
+
+}; // namespace android
+
+#endif // _MTP_EVENT_PACKET_H
diff --git a/media/mtp/MtpObjectInfo.cpp b/media/mtp/MtpObjectInfo.cpp
new file mode 100644
index 0000000..dd4304e
--- /dev/null
+++ b/media/mtp/MtpObjectInfo.cpp
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpObjectInfo"
+
+#include "MtpDebug.h"
+#include "MtpDataPacket.h"
+#include "MtpObjectInfo.h"
+#include "MtpStringBuffer.h"
+#include "MtpUtils.h"
+
+namespace android {
+
+MtpObjectInfo::MtpObjectInfo(MtpObjectHandle handle)
+    :   mHandle(handle),
+        mStorageID(0),
+        mFormat(0),
+        mProtectionStatus(0),
+        mCompressedSize(0),
+        mThumbFormat(0),
+        mThumbCompressedSize(0),
+        mThumbPixWidth(0),
+        mThumbPixHeight(0),
+        mImagePixWidth(0),
+        mImagePixHeight(0),
+        mImagePixDepth(0),
+        mParent(0),
+        mAssociationType(0),
+        mAssociationDesc(0),
+        mSequenceNumber(0),
+        mName(NULL),
+        mDateCreated(0),
+        mDateModified(0),
+        mKeywords(NULL)
+{
+}
+
+MtpObjectInfo::~MtpObjectInfo() {
+    if (mName)
+        free(mName);
+    if (mKeywords)
+        free(mKeywords);
+}
+
+void MtpObjectInfo::read(MtpDataPacket& packet) {
+    MtpStringBuffer string;
+    time_t time;
+
+    mStorageID = packet.getUInt32();
+    mFormat = packet.getUInt16();
+    mProtectionStatus = packet.getUInt16();
+    mCompressedSize = packet.getUInt32();
+    mThumbFormat = packet.getUInt16();
+    mThumbCompressedSize = packet.getUInt32();
+    mThumbPixWidth = packet.getUInt32();
+    mThumbPixHeight = packet.getUInt32();
+    mImagePixWidth = packet.getUInt32();
+    mImagePixHeight = packet.getUInt32();
+    mImagePixDepth = packet.getUInt32();
+    mParent = packet.getUInt32();
+    mAssociationType = packet.getUInt16();
+    mAssociationDesc = packet.getUInt32();
+    mSequenceNumber = packet.getUInt32();
+
+    packet.getString(string);
+    mName = strdup((const char *)string);
+
+    packet.getString(string);
+    if (parseDateTime((const char*)string, time))
+        mDateCreated = time;
+
+    packet.getString(string);
+    if (parseDateTime((const char*)string, time))
+        mDateModified = time;
+
+    packet.getString(string);
+    mKeywords = strdup((const char *)string);
+}
+
+void MtpObjectInfo::print() {
+    LOGD("MtpObject Info %08X: %s\n", mHandle, mName);
+    LOGD("  mStorageID: %08X mFormat: %04X mProtectionStatus: %d\n",
+            mStorageID, mFormat, mProtectionStatus);
+    LOGD("  mCompressedSize: %d mThumbFormat: %04X mThumbCompressedSize: %d\n",
+            mCompressedSize, mFormat, mThumbCompressedSize);
+    LOGD("  mThumbPixWidth: %d mThumbPixHeight: %d\n", mThumbPixWidth, mThumbPixHeight);
+    LOGD("  mImagePixWidth: %d mImagePixHeight: %d mImagePixDepth: %d\n",
+            mImagePixWidth, mImagePixHeight, mImagePixDepth);
+    LOGD("  mParent: %08X mAssociationType: %04X mAssociationDesc: %04X\n",
+            mParent, mAssociationType, mAssociationDesc);
+    LOGD("  mSequenceNumber: %d mDateCreated: %d mDateModified: %d mKeywords: %s\n",
+            mSequenceNumber, mDateCreated, mDateModified, mKeywords);
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpObjectInfo.h b/media/mtp/MtpObjectInfo.h
new file mode 100644
index 0000000..c7a449c
--- /dev/null
+++ b/media/mtp/MtpObjectInfo.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2010 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 _MTP_OBJECT_INFO_H
+#define _MTP_OBJECT_INFO_H
+
+#include "MtpTypes.h"
+
+namespace android {
+
+class MtpDataPacket;
+
+class MtpObjectInfo {
+public:
+    MtpObjectHandle     mHandle;
+    MtpStorageID        mStorageID;
+    MtpObjectFormat     mFormat;
+    uint16_t            mProtectionStatus;
+    uint32_t            mCompressedSize;
+    MtpObjectFormat     mThumbFormat;
+    uint32_t            mThumbCompressedSize;
+    uint32_t            mThumbPixWidth;
+    uint32_t            mThumbPixHeight;
+    uint32_t            mImagePixWidth;
+    uint32_t            mImagePixHeight;
+    uint32_t            mImagePixDepth;
+    MtpObjectHandle     mParent;
+    uint16_t            mAssociationType;
+    uint32_t            mAssociationDesc;
+    uint32_t            mSequenceNumber;
+    char*               mName;
+    time_t              mDateCreated;
+    time_t              mDateModified;
+    char*               mKeywords;
+
+public:
+                        MtpObjectInfo(MtpObjectHandle handle);
+    virtual             ~MtpObjectInfo();
+
+    void                read(MtpDataPacket& packet);
+
+    void                print();
+};
+
+}; // namespace android
+
+#endif // _MTP_OBJECT_INFO_H
diff --git a/media/mtp/MtpPacket.cpp b/media/mtp/MtpPacket.cpp
new file mode 100644
index 0000000..42bf8ba
--- /dev/null
+++ b/media/mtp/MtpPacket.cpp
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpPacket"
+
+#include "MtpDebug.h"
+#include "MtpPacket.h"
+#include "mtp.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <usbhost/usbhost.h>
+
+namespace android {
+
+MtpPacket::MtpPacket(int bufferSize)
+    :   mBuffer(NULL),
+        mBufferSize(bufferSize),
+        mAllocationIncrement(bufferSize),
+        mPacketSize(0)
+{
+    mBuffer = (uint8_t *)malloc(bufferSize);
+    if (!mBuffer) {
+        LOGE("out of memory!");
+        abort();
+    }
+}
+
+MtpPacket::~MtpPacket() {
+    if (mBuffer)
+        free(mBuffer);
+}
+
+void MtpPacket::reset() {
+    allocate(MTP_CONTAINER_HEADER_SIZE);
+    mPacketSize = MTP_CONTAINER_HEADER_SIZE;
+    memset(mBuffer, 0, mBufferSize);
+}
+
+void MtpPacket::allocate(int length) {
+    if (length > mBufferSize) {
+        int newLength = length + mAllocationIncrement;
+        mBuffer = (uint8_t *)realloc(mBuffer, newLength);
+        if (!mBuffer) {
+            LOGE("out of memory!");
+            abort();
+        }
+        mBufferSize = newLength;
+    }
+}
+
+void MtpPacket::dump() {
+#define DUMP_BYTES_PER_ROW  16
+    char buffer[500];
+    char* bufptr = buffer;
+
+    for (int i = 0; i < mPacketSize; i++) {
+        sprintf(bufptr, "%02X ", mBuffer[i]);
+        bufptr += strlen(bufptr);
+        if (i % DUMP_BYTES_PER_ROW == (DUMP_BYTES_PER_ROW - 1)) {
+            LOGV("%s", buffer);
+            bufptr = buffer;
+        }
+    }
+    if (bufptr != buffer) {
+        // print last line
+        LOGV("%s", buffer);
+    }
+    LOGV("\n");
+}
+
+uint16_t MtpPacket::getUInt16(int offset) const {
+    return ((uint16_t)mBuffer[offset + 1] << 8) | (uint16_t)mBuffer[offset];
+}
+
+uint32_t MtpPacket::getUInt32(int offset) const {
+    return ((uint32_t)mBuffer[offset + 3] << 24) | ((uint32_t)mBuffer[offset + 2] << 16) |
+           ((uint32_t)mBuffer[offset + 1] << 8)  | (uint32_t)mBuffer[offset];
+}
+
+void MtpPacket::putUInt16(int offset, uint16_t value) {
+    mBuffer[offset++] = (uint8_t)(value & 0xFF);
+    mBuffer[offset++] = (uint8_t)((value >> 8) & 0xFF);
+}
+
+void MtpPacket::putUInt32(int offset, uint32_t value) {
+    mBuffer[offset++] = (uint8_t)(value & 0xFF);
+    mBuffer[offset++] = (uint8_t)((value >> 8) & 0xFF);
+    mBuffer[offset++] = (uint8_t)((value >> 16) & 0xFF);
+    mBuffer[offset++] = (uint8_t)((value >> 24) & 0xFF);
+}
+
+uint16_t MtpPacket::getContainerCode() const {
+    return getUInt16(MTP_CONTAINER_CODE_OFFSET);
+}
+
+void MtpPacket::setContainerCode(uint16_t code) {
+    putUInt16(MTP_CONTAINER_CODE_OFFSET, code);
+}
+
+MtpTransactionID MtpPacket::getTransactionID() const {
+    return getUInt32(MTP_CONTAINER_TRANSACTION_ID_OFFSET);
+}
+
+void MtpPacket::setTransactionID(MtpTransactionID id) {
+    putUInt32(MTP_CONTAINER_TRANSACTION_ID_OFFSET, id);
+}
+
+uint32_t MtpPacket::getParameter(int index) const {
+    if (index < 1 || index > 5) {
+        LOGE("index %d out of range in MtpRequestPacket::getParameter", index);
+        return 0;
+    }
+    return getUInt32(MTP_CONTAINER_PARAMETER_OFFSET + (index - 1) * sizeof(uint32_t));
+}
+
+void MtpPacket::setParameter(int index, uint32_t value) {
+    if (index < 1 || index > 5) {
+        LOGE("index %d out of range in MtpResponsePacket::setParameter", index);
+        return;
+    }
+    int offset = MTP_CONTAINER_PARAMETER_OFFSET + (index - 1) * sizeof(uint32_t);
+    if (mPacketSize < offset + sizeof(uint32_t))
+        mPacketSize = offset + sizeof(uint32_t);
+    putUInt32(offset, value);
+}
+
+#ifdef MTP_HOST
+int MtpPacket::transfer(struct usb_endpoint *ep, void* buffer, int length) {
+    if (usb_endpoint_queue(ep, buffer, length)) {
+        LOGE("usb_endpoint_queue failed, errno: %d", errno);
+        return -1;
+    }
+    int ep_num;
+    return usb_endpoint_wait(usb_endpoint_get_device(ep), &ep_num);
+}
+#endif
+
+}  // namespace android
diff --git a/media/mtp/MtpPacket.h b/media/mtp/MtpPacket.h
new file mode 100644
index 0000000..a624a71
--- /dev/null
+++ b/media/mtp/MtpPacket.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2010 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 _MTP_PACKET_H
+#define _MTP_PACKET_H
+
+#include "MtpTypes.h"
+
+struct usb_endpoint;
+
+namespace android {
+
+class MtpStringBuffer;
+
+class MtpPacket {
+
+protected:
+    uint8_t*            mBuffer;
+    // current size of the buffer
+    int                 mBufferSize;
+    // number of bytes to add when resizing the buffer
+    int                 mAllocationIncrement;
+    // size of the data in the packet
+    int                 mPacketSize;
+
+public:
+                        MtpPacket(int bufferSize);
+    virtual             ~MtpPacket();
+
+    // sets packet size to the default container size and sets buffer to zero
+    virtual void        reset();
+
+    void                allocate(int length);
+    void                dump();
+
+    uint16_t            getContainerCode() const;
+    void                setContainerCode(uint16_t code);
+
+    MtpTransactionID    getTransactionID() const;
+    void                setTransactionID(MtpTransactionID id);
+
+    uint32_t            getParameter(int index) const;
+    void                setParameter(int index, uint32_t value);
+
+#ifdef MTP_HOST
+    int                 transfer(struct usb_endpoint *ep, void* buffer, int length);
+#endif
+
+protected:
+    uint16_t            getUInt16(int offset) const;
+    uint32_t            getUInt32(int offset) const;
+    void                putUInt16(int offset, uint16_t value);
+    void                putUInt32(int offset, uint32_t value);
+};
+
+}; // namespace android
+
+#endif // _MTP_PACKET_H
diff --git a/media/mtp/MtpProperty.cpp b/media/mtp/MtpProperty.cpp
new file mode 100644
index 0000000..8d639a5
--- /dev/null
+++ b/media/mtp/MtpProperty.cpp
@@ -0,0 +1,290 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpProperty"
+
+#include "MtpDataPacket.h"
+#include "MtpProperty.h"
+#include "MtpStringBuffer.h"
+#include "MtpUtils.h"
+
+namespace android {
+
+MtpProperty::MtpProperty()
+    :   mCode(0),
+        mType(0),
+        mWriteable(false),
+        mDefaultArrayLength(0),
+        mDefaultArrayValues(NULL),
+        mCurrentArrayLength(0),
+        mCurrentArrayValues(NULL),
+        mFormFlag(kFormNone),
+        mEnumLength(0),
+        mEnumValues(NULL)
+{
+    mDefaultValue.str = NULL;
+    mCurrentValue.str = NULL;
+    mMinimumValue.str = NULL;
+    mMaximumValue.str = NULL;
+}
+
+MtpProperty::MtpProperty(MtpPropertyCode propCode,
+                         MtpDataType type,
+                         bool writeable,
+                         int defaultValue)
+    :   mCode(propCode),
+        mType(type),
+        mWriteable(writeable),
+        mDefaultArrayLength(0),
+        mDefaultArrayValues(NULL),
+        mCurrentArrayLength(0),
+        mCurrentArrayValues(NULL),
+        mFormFlag(kFormNone),
+        mEnumLength(0),
+        mEnumValues(NULL)
+{
+    memset(&mDefaultValue, 0, sizeof(mDefaultValue));
+    memset(&mCurrentValue, 0, sizeof(mCurrentValue));
+    memset(&mMinimumValue, 0, sizeof(mMinimumValue));
+    memset(&mMaximumValue, 0, sizeof(mMaximumValue));
+
+    if (defaultValue) {
+        switch (type) {
+            case MTP_TYPE_INT8:
+                mDefaultValue.i8 = defaultValue;
+                break;
+            case MTP_TYPE_UINT8:
+                mDefaultValue.u8 = defaultValue;
+                break;
+            case MTP_TYPE_INT16:
+                mDefaultValue.i16 = defaultValue;
+                break;
+            case MTP_TYPE_UINT16:
+                mDefaultValue.u16 = defaultValue;
+                break;
+            case MTP_TYPE_INT32:
+                mDefaultValue.i32 = defaultValue;
+                break;
+            case MTP_TYPE_UINT32:
+                mDefaultValue.u32 = defaultValue;
+                break;
+            case MTP_TYPE_INT64:
+                mDefaultValue.i64 = defaultValue;
+                break;
+            case MTP_TYPE_UINT64:
+                mDefaultValue.u64 = defaultValue;
+                break;
+            default:
+                LOGE("unknown type %d in MtpProperty::MtpProperty", type);
+        }
+    }
+}
+
+MtpProperty::~MtpProperty() {
+    if (mType == MTP_TYPE_STR) {
+        // free all strings
+        free(mDefaultValue.str);
+        free(mCurrentValue.str);
+        free(mMinimumValue.str);
+        free(mMaximumValue.str);
+        if (mDefaultArrayValues) {
+            for (int i = 0; i < mDefaultArrayLength; i++)
+                free(mDefaultArrayValues[i].str);
+        }
+        if (mCurrentArrayValues) {
+            for (int i = 0; i < mCurrentArrayLength; i++)
+                free(mCurrentArrayValues[i].str);
+        }
+        if (mEnumValues) {
+            for (int i = 0; i < mEnumLength; i++)
+                free(mEnumValues[i].str);
+        }
+    }
+    delete[] mDefaultArrayValues;
+    delete[] mCurrentArrayValues;
+    delete[] mEnumValues;
+}
+
+void MtpProperty::read(MtpDataPacket& packet, bool deviceProp) {
+    MtpStringBuffer string;
+
+    mCode = packet.getUInt16();
+    mType = packet.getUInt16();
+    mWriteable = (packet.getUInt8() == 1);
+    switch (mType) {
+        case MTP_TYPE_AINT8:
+        case MTP_TYPE_AUINT8:
+        case MTP_TYPE_AINT16:
+        case MTP_TYPE_AUINT16:
+        case MTP_TYPE_AINT32:
+        case MTP_TYPE_AUINT32:
+        case MTP_TYPE_AINT64:
+        case MTP_TYPE_AUINT64:
+        case MTP_TYPE_AINT128:
+        case MTP_TYPE_AUINT128:
+            mDefaultArrayValues = readArrayValues(packet, mDefaultArrayLength);
+            mCurrentArrayValues = readArrayValues(packet, mCurrentArrayLength);
+            break;
+        default:
+            readValue(packet, mDefaultValue);
+            if (deviceProp)
+                readValue(packet, mCurrentValue);
+    }
+    mFormFlag = packet.getUInt8();
+
+    if (mFormFlag == kFormRange) {
+            readValue(packet, mMinimumValue);
+            readValue(packet, mMaximumValue);
+            readValue(packet, mStepSize);
+    } else if (mFormFlag == kFormEnum) {
+        mEnumLength = packet.getUInt16();
+        mEnumValues = new MtpPropertyValue[mEnumLength];
+        for (int i = 0; i < mEnumLength; i++)
+            readValue(packet, mEnumValues[i]);
+    }
+}
+
+// FIXME - only works for object properties
+void MtpProperty::write(MtpDataPacket& packet) {
+    packet.putUInt16(mCode);
+    packet.putUInt16(mType);
+    packet.putUInt8(mWriteable ? 1 : 0);
+
+    switch (mType) {
+        case MTP_TYPE_AINT8:
+        case MTP_TYPE_AUINT8:
+        case MTP_TYPE_AINT16:
+        case MTP_TYPE_AUINT16:
+        case MTP_TYPE_AINT32:
+        case MTP_TYPE_AUINT32:
+        case MTP_TYPE_AINT64:
+        case MTP_TYPE_AUINT64:
+        case MTP_TYPE_AINT128:
+        case MTP_TYPE_AUINT128:
+            writeArrayValues(packet, mDefaultArrayValues, mDefaultArrayLength);
+            break;
+        default:
+            writeValue(packet, mDefaultValue);
+    }
+    packet.putUInt8(mFormFlag);
+    if (mFormFlag == kFormRange) {
+            writeValue(packet, mMinimumValue);
+            writeValue(packet, mMaximumValue);
+            writeValue(packet, mStepSize);
+    } else if (mFormFlag == kFormEnum) {
+        packet.putUInt16(mEnumLength);
+        for (int i = 0; i < mEnumLength; i++)
+            writeValue(packet, mEnumValues[i]);
+    }
+}
+
+void MtpProperty::print() {
+    LOGD("MtpProperty %04X\n", mCode);
+    LOGD("    type %04X\n", mType);
+    LOGD("    writeable %s\n", (mWriteable ? "true" : "false"));
+}
+
+void MtpProperty::readValue(MtpDataPacket& packet, MtpPropertyValue& value) {
+    switch (mType) {
+        case MTP_TYPE_INT8:
+            value.i8 = packet.getInt8();
+            break;
+        case MTP_TYPE_UINT8:
+            value.u8 = packet.getUInt8();
+            break;
+        case MTP_TYPE_INT16:
+            value.i16 = packet.getInt16();
+            break;
+        case MTP_TYPE_UINT16:
+            value.u16 = packet.getUInt16();
+            break;
+        case MTP_TYPE_INT32:
+            value.i32 = packet.getInt32();
+            break;
+        case MTP_TYPE_UINT32:
+            value.u32 = packet.getUInt32();
+            break;
+        case MTP_TYPE_INT64:
+            value.i64 = packet.getInt64();
+            break;
+        case MTP_TYPE_UINT64:
+            value.u64 = packet.getUInt64();
+            break;
+        case MTP_TYPE_INT128:
+            packet.getInt128(value.i128);
+            break;
+        case MTP_TYPE_UINT128:
+            packet.getUInt128(value.u128);
+            break;
+        default:
+            LOGE("unknown type %d in MtpProperty::readValue", mType);
+    }
+}
+
+void MtpProperty::writeValue(MtpDataPacket& packet, MtpPropertyValue& value) {
+    switch (mType) {
+        case MTP_TYPE_INT8:
+            packet.putInt8(value.i8);
+            break;
+        case MTP_TYPE_UINT8:
+            packet.putUInt8(value.u8);
+            break;
+        case MTP_TYPE_INT16:
+            packet.putInt16(value.i16);
+            break;
+        case MTP_TYPE_UINT16:
+            packet.putUInt16(value.u16);
+            break;
+        case MTP_TYPE_INT32:
+            packet.putInt32(value.i32);
+            break;
+        case MTP_TYPE_UINT32:
+            packet.putUInt32(value.u32);
+            break;
+        case MTP_TYPE_INT64:
+            packet.putInt64(value.i64);
+            break;
+        case MTP_TYPE_UINT64:
+            packet.putUInt64(value.u64);
+            break;
+        case MTP_TYPE_INT128:
+            packet.putInt128(value.i128);
+            break;
+        case MTP_TYPE_UINT128:
+            packet.putUInt128(value.u128);
+            break;
+        default:
+            LOGE("unknown type %d in MtpProperty::readValue", mType);
+    }
+}
+
+MtpPropertyValue* MtpProperty::readArrayValues(MtpDataPacket& packet, int& length) {
+    length = packet.getUInt32();
+    if (length == 0)
+        return NULL;
+    MtpPropertyValue* result = new MtpPropertyValue[length];
+    for (int i = 0; i < length; i++)
+        readValue(packet, result[i]);
+    return result;
+}
+
+void MtpProperty::writeArrayValues(MtpDataPacket& packet, MtpPropertyValue* values, int length) {
+    packet.putUInt32(length);
+    for (int i = 0; i < length; i++)
+        writeValue(packet, values[i]);
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpProperty.h b/media/mtp/MtpProperty.h
new file mode 100644
index 0000000..4923d40
--- /dev/null
+++ b/media/mtp/MtpProperty.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2010 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 _MTP_PROPERTY_H
+#define _MTP_PROPERTY_H
+
+#include "MtpTypes.h"
+
+namespace android {
+
+class MtpDataPacket;
+
+class MtpProperty {
+public:
+    MtpPropertyCode     mCode;
+    MtpDataType         mType;
+    bool                mWriteable;
+    MtpPropertyValue    mDefaultValue;
+    MtpPropertyValue    mCurrentValue;
+
+    // for array types
+    int                 mDefaultArrayLength;
+    MtpPropertyValue*   mDefaultArrayValues;
+    int                 mCurrentArrayLength;
+    MtpPropertyValue*   mCurrentArrayValues;
+
+    enum {
+        kFormNone = 0,
+        kFormRange = 1,
+        kFormEnum = 2,
+    };
+    uint8_t             mFormFlag;
+
+    // for range form
+    MtpPropertyValue    mMinimumValue;
+    MtpPropertyValue    mMaximumValue;
+    MtpPropertyValue    mStepSize;
+
+    // for enum form
+    int                 mEnumLength;
+    MtpPropertyValue*   mEnumValues;
+
+public:
+                        MtpProperty();
+                        MtpProperty(MtpPropertyCode propCode,
+                                     MtpDataType type,
+                                     bool writeable = false,
+                                     int defaultValue = 0);
+    virtual             ~MtpProperty();
+
+    inline MtpPropertyCode getPropertyCode() const { return mCode; }
+
+    void                read(MtpDataPacket& packet, bool deviceProp);
+    void                write(MtpDataPacket& packet);
+
+    void                print();
+
+private:
+    void                readValue(MtpDataPacket& packet, MtpPropertyValue& value);
+    void                writeValue(MtpDataPacket& packet, MtpPropertyValue& value);
+    MtpPropertyValue*   readArrayValues(MtpDataPacket& packet, int& length);
+    void                writeArrayValues(MtpDataPacket& packet, MtpPropertyValue* values, int length);
+};
+
+}; // namespace android
+
+#endif // _MTP_PROPERTY_H
diff --git a/media/mtp/MtpRequestPacket.cpp b/media/mtp/MtpRequestPacket.cpp
new file mode 100644
index 0000000..8ece580
--- /dev/null
+++ b/media/mtp/MtpRequestPacket.cpp
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpRequestPacket"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include "MtpRequestPacket.h"
+
+namespace android {
+
+MtpRequestPacket::MtpRequestPacket()
+    :   MtpPacket(512)
+{
+}
+
+MtpRequestPacket::~MtpRequestPacket() {
+}
+
+#ifdef MTP_DEVICE
+int MtpRequestPacket::read(int fd) {
+    int ret = ::read(fd, mBuffer, mBufferSize);
+    if (ret >= 0)
+        mPacketSize = ret;
+    else
+        mPacketSize = 0;
+    return ret;
+}
+#endif
+
+#ifdef MTP_HOST
+    // write our buffer to the given endpoint (host mode)
+int MtpRequestPacket::write(struct usb_endpoint *ep)
+{
+    putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize);
+    putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_COMMAND);
+    return transfer(ep, mBuffer, mPacketSize);
+}
+#endif
+
+}  // namespace android
diff --git a/media/mtp/MtpRequestPacket.h b/media/mtp/MtpRequestPacket.h
new file mode 100644
index 0000000..df518f2
--- /dev/null
+++ b/media/mtp/MtpRequestPacket.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2010 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 _MTP_REQUEST_PACKET_H
+#define _MTP_REQUEST_PACKET_H
+
+#include "MtpPacket.h"
+#include "mtp.h"
+
+namespace android {
+
+class MtpRequestPacket : public MtpPacket {
+
+public:
+                        MtpRequestPacket();
+    virtual             ~MtpRequestPacket();
+
+#ifdef MTP_DEVICE
+    // fill our buffer with data from the given file descriptor
+    int                 read(int fd);
+#endif
+
+#ifdef MTP_HOST
+    // write our buffer to the given endpoint
+    int                 write(struct usb_endpoint *ep);
+#endif
+
+    inline MtpOperationCode    getOperationCode() const { return getContainerCode(); }
+    inline void                setOperationCode(MtpOperationCode code)
+                                                    { return setContainerCode(code); }
+};
+
+}; // namespace android
+
+#endif // _MTP_REQUEST_PACKET_H
diff --git a/media/mtp/MtpResponsePacket.cpp b/media/mtp/MtpResponsePacket.cpp
new file mode 100644
index 0000000..3ef714e
--- /dev/null
+++ b/media/mtp/MtpResponsePacket.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpResponsePacket"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include "MtpResponsePacket.h"
+
+namespace android {
+
+MtpResponsePacket::MtpResponsePacket()
+    :   MtpPacket(512)
+{
+}
+
+MtpResponsePacket::~MtpResponsePacket() {
+}
+
+#ifdef MTP_DEVICE
+int MtpResponsePacket::write(int fd) {
+    putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize);
+    putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_RESPONSE);
+    int ret = ::write(fd, mBuffer, mPacketSize);
+    return (ret < 0 ? ret : 0);
+}
+#endif
+
+#ifdef MTP_HOST
+    // read our buffer from the given endpoint
+int MtpResponsePacket::read(struct usb_endpoint *ep) {
+    int ret = transfer(ep, mBuffer, mBufferSize);
+     if (ret >= 0)
+        mPacketSize = ret;
+    else
+        mPacketSize = 0;
+    return ret;
+}
+#endif
+
+}  // namespace android
+
diff --git a/media/mtp/MtpResponsePacket.h b/media/mtp/MtpResponsePacket.h
new file mode 100644
index 0000000..373f8f9
--- /dev/null
+++ b/media/mtp/MtpResponsePacket.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2010 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 _MTP_RESPONSE_PACKET_H
+#define _MTP_RESPONSE_PACKET_H
+
+#include "MtpPacket.h"
+#include "mtp.h"
+
+namespace android {
+
+class MtpResponsePacket : public MtpPacket {
+
+public:
+                        MtpResponsePacket();
+    virtual             ~MtpResponsePacket();
+
+#ifdef MTP_DEVICE
+    // write our data to the given file descriptor
+    int                 write(int fd);
+#endif
+
+#ifdef MTP_HOST
+    // read our buffer from the given endpoint
+    int                 read(struct usb_endpoint *ep);
+#endif
+
+    inline MtpResponseCode      getResponseCode() const { return getContainerCode(); }
+    inline void                 setResponseCode(MtpResponseCode code)
+                                                     { return setContainerCode(code); }
+};
+
+}; // namespace android
+
+#endif // _MTP_RESPONSE_PACKET_H
diff --git a/media/mtp/MtpServer.cpp b/media/mtp/MtpServer.cpp
new file mode 100644
index 0000000..163c05b
--- /dev/null
+++ b/media/mtp/MtpServer.cpp
@@ -0,0 +1,664 @@
+/*
+ * Copyright (C) 2010 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 <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <cutils/properties.h>
+
+#include "MtpDebug.h"
+#include "MtpDatabase.h"
+#include "MtpProperty.h"
+#include "MtpServer.h"
+#include "MtpStorage.h"
+#include "MtpStringBuffer.h"
+
+#include <linux/usb/f_mtp.h>
+
+namespace android {
+
+static const MtpOperationCode kSupportedOperationCodes[] = {
+    MTP_OPERATION_GET_DEVICE_INFO,
+    MTP_OPERATION_OPEN_SESSION,
+    MTP_OPERATION_CLOSE_SESSION,
+    MTP_OPERATION_GET_STORAGE_IDS,
+    MTP_OPERATION_GET_STORAGE_INFO,
+    MTP_OPERATION_GET_NUM_OBJECTS,
+    MTP_OPERATION_GET_OBJECT_HANDLES,
+    MTP_OPERATION_GET_OBJECT_INFO,
+    MTP_OPERATION_GET_OBJECT,
+//    MTP_OPERATION_GET_THUMB,
+    MTP_OPERATION_DELETE_OBJECT,
+    MTP_OPERATION_SEND_OBJECT_INFO,
+    MTP_OPERATION_SEND_OBJECT,
+//    MTP_OPERATION_INITIATE_CAPTURE,
+//    MTP_OPERATION_FORMAT_STORE,
+//    MTP_OPERATION_RESET_DEVICE,
+//    MTP_OPERATION_SELF_TEST,
+//    MTP_OPERATION_SET_OBJECT_PROTECTION,
+//    MTP_OPERATION_POWER_DOWN,
+    MTP_OPERATION_GET_DEVICE_PROP_DESC,
+    MTP_OPERATION_GET_DEVICE_PROP_VALUE,
+    MTP_OPERATION_SET_DEVICE_PROP_VALUE,
+    MTP_OPERATION_RESET_DEVICE_PROP_VALUE,
+//    MTP_OPERATION_TERMINATE_OPEN_CAPTURE,
+//    MTP_OPERATION_MOVE_OBJECT,
+//    MTP_OPERATION_COPY_OBJECT,
+//    MTP_OPERATION_GET_PARTIAL_OBJECT,
+//    MTP_OPERATION_INITIATE_OPEN_CAPTURE,
+    MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED,
+//    MTP_OPERATION_GET_OBJECT_PROP_DESC,
+    MTP_OPERATION_GET_OBJECT_PROP_VALUE,
+    MTP_OPERATION_SET_OBJECT_PROP_VALUE,
+//    MTP_OPERATION_GET_OBJECT_REFERENCES,
+//    MTP_OPERATION_SET_OBJECT_REFERENCES,
+//    MTP_OPERATION_SKIP,
+};
+
+static const MtpEventCode kSupportedEventCodes[] = {
+    MTP_EVENT_OBJECT_ADDED,
+    MTP_EVENT_OBJECT_REMOVED,
+};
+
+static const MtpObjectProperty kSupportedObjectProperties[] = {
+    MTP_PROPERTY_STORAGE_ID,
+    MTP_PROPERTY_OBJECT_FORMAT,
+    MTP_PROPERTY_OBJECT_SIZE,
+    MTP_PROPERTY_OBJECT_FILE_NAME,
+    MTP_PROPERTY_PARENT_OBJECT,
+};
+
+static const MtpObjectFormat kSupportedPlaybackFormats[] = {
+    // MTP_FORMAT_UNDEFINED,
+    MTP_FORMAT_ASSOCIATION,
+    // MTP_FORMAT_TEXT,
+    // MTP_FORMAT_HTML,
+    MTP_FORMAT_MP3,
+    //MTP_FORMAT_AVI,
+    MTP_FORMAT_MPEG,
+    // MTP_FORMAT_ASF,
+    MTP_FORMAT_EXIF_JPEG,
+    MTP_FORMAT_TIFF_EP,
+    // MTP_FORMAT_BMP,
+    MTP_FORMAT_GIF,
+    MTP_FORMAT_JFIF,
+    MTP_FORMAT_PNG,
+    MTP_FORMAT_TIFF,
+    MTP_FORMAT_WMA,
+    MTP_FORMAT_OGG,
+    MTP_FORMAT_AAC,
+    // MTP_FORMAT_FLAC,
+    // MTP_FORMAT_WMV,
+    MTP_FORMAT_MP4_CONTAINER,
+    MTP_FORMAT_MP2,
+    MTP_FORMAT_3GP_CONTAINER,
+    // MTP_FORMAT_ABSTRACT_AUDIO_ALBUM,
+    // MTP_FORMAT_ABSTRACT_AV_PLAYLIST,
+    // MTP_FORMAT_WPL_PLAYLIST,
+    // MTP_FORMAT_M3U_PLAYLIST,
+    // MTP_FORMAT_MPL_PLAYLIST,
+    // MTP_FORMAT_PLS_PLAYLIST,
+};
+
+MtpServer::MtpServer(int fd, MtpDatabase* database,
+                    int fileGroup, int filePerm, int directoryPerm)
+    :   mFD(fd),
+        mDatabase(database),
+        mFileGroup(fileGroup),
+        mFilePermission(filePerm),
+        mDirectoryPermission(directoryPerm),
+        mSessionID(0),
+        mSessionOpen(false),
+        mSendObjectHandle(kInvalidObjectHandle),
+        mSendObjectFormat(0),
+        mSendObjectFileSize(0)
+{
+    initObjectProperties();
+}
+
+MtpServer::~MtpServer() {
+}
+
+void MtpServer::addStorage(const char* filePath) {
+    int index = mStorages.size() + 1;
+    index |= index << 16;   // set high and low part to our index
+    MtpStorage* storage = new MtpStorage(index, filePath, mDatabase);
+    addStorage(storage);
+}
+
+MtpStorage* MtpServer::getStorage(MtpStorageID id) {
+    for (int i = 0; i < mStorages.size(); i++) {
+        MtpStorage* storage =  mStorages[i];
+        if (storage->getStorageID() == id)
+            return storage;
+    }
+    return NULL;
+}
+
+void MtpServer::run() {
+    int fd = mFD;
+
+    LOGV("MtpServer::run fd: %d\n", fd);
+
+    while (1) {
+        int ret = mRequest.read(fd);
+        if (ret < 0) {
+            LOGE("request read returned %d, errno: %d", ret, errno);
+            if (errno == ECANCELED) {
+                // return to top of loop and wait for next command
+                continue;
+            }
+            break;
+        }
+        MtpOperationCode operation = mRequest.getOperationCode();
+        MtpTransactionID transaction = mRequest.getTransactionID();
+
+        LOGV("operation: %s", MtpDebug::getOperationCodeName(operation));
+        mRequest.dump();
+
+        // FIXME need to generalize this
+        bool dataIn = (operation == MTP_OPERATION_SEND_OBJECT_INFO);
+        if (dataIn) {
+            int ret = mData.read(fd);
+            if (ret < 0) {
+                LOGE("data read returned %d, errno: %d", ret, errno);
+                if (errno == ECANCELED) {
+                    // return to top of loop and wait for next command
+                    continue;
+                }
+                break;
+            }
+            LOGV("received data:");
+            mData.dump();
+        } else {
+            mData.reset();
+        }
+
+        if (handleRequest()) {
+            if (!dataIn && mData.hasData()) {
+                mData.setOperationCode(operation);
+                mData.setTransactionID(transaction);
+                LOGV("sending data:");
+                mData.dump();
+                ret = mData.write(fd);
+                if (ret < 0) {
+                    LOGE("request write returned %d, errno: %d", ret, errno);
+                    if (errno == ECANCELED) {
+                        // return to top of loop and wait for next command
+                        continue;
+                    }
+                    break;
+                }
+            }
+
+            mResponse.setTransactionID(transaction);
+            LOGV("sending response %04X", mResponse.getResponseCode());
+            ret = mResponse.write(fd);
+            if (ret < 0) {
+                LOGE("request write returned %d, errno: %d", ret, errno);
+                if (errno == ECANCELED) {
+                    // return to top of loop and wait for next command
+                    continue;
+                }
+                break;
+            }
+        } else {
+            LOGV("skipping response\n");
+        }
+    }
+}
+
+MtpProperty* MtpServer::getObjectProperty(MtpPropertyCode propCode) {
+    for (int i = 0; i < mObjectProperties.size(); i++) {
+        MtpProperty* property = mObjectProperties[i];
+        if (property->getPropertyCode() == propCode)
+            return property;
+    }
+    return NULL;
+}
+
+MtpProperty* MtpServer::getDeviceProperty(MtpPropertyCode propCode) {
+    for (int i = 0; i < mDeviceProperties.size(); i++) {
+        MtpProperty* property = mDeviceProperties[i];
+        if (property->getPropertyCode() == propCode)
+            return property;
+    }
+    return NULL;
+}
+
+void MtpServer::sendObjectAdded(MtpObjectHandle handle) {
+    LOGD("sendObjectAdded %d\n", handle);
+    mEvent.setEventCode(MTP_EVENT_OBJECT_ADDED);
+    mEvent.setTransactionID(mRequest.getTransactionID());
+    mEvent.setParameter(1, handle);
+    int ret = mEvent.write(mFD);
+    LOGD("mEvent.write returned %d\n", ret);
+}
+
+void MtpServer::sendObjectRemoved(MtpObjectHandle handle) {
+    LOGD("sendObjectRemoved %d\n", handle);
+    mEvent.setEventCode(MTP_EVENT_OBJECT_REMOVED);
+    mEvent.setTransactionID(mRequest.getTransactionID());
+    mEvent.setParameter(1, handle);
+    int ret = mEvent.write(mFD);
+    LOGD("mEvent.write returned %d\n", ret);
+}
+
+void MtpServer::initObjectProperties() {
+    mObjectProperties.push(new MtpProperty(MTP_PROPERTY_STORAGE_ID, MTP_TYPE_UINT16));
+    mObjectProperties.push(new MtpProperty(MTP_PROPERTY_OBJECT_FORMAT, MTP_TYPE_UINT16));
+    mObjectProperties.push(new MtpProperty(MTP_PROPERTY_OBJECT_SIZE, MTP_TYPE_UINT64));
+    mObjectProperties.push(new MtpProperty(MTP_PROPERTY_OBJECT_FILE_NAME, MTP_TYPE_STR));
+    mObjectProperties.push(new MtpProperty(MTP_PROPERTY_PARENT_OBJECT, MTP_TYPE_UINT32));
+}
+
+bool MtpServer::handleRequest() {
+    MtpOperationCode operation = mRequest.getOperationCode();
+    MtpResponseCode response;
+
+    mResponse.reset();
+
+    if (mSendObjectHandle != kInvalidObjectHandle && operation != MTP_OPERATION_SEND_OBJECT) {
+        // FIXME - need to delete mSendObjectHandle from the database
+        LOGE("expected SendObject after SendObjectInfo");
+        mSendObjectHandle = kInvalidObjectHandle;
+    }
+
+    switch (operation) {
+        case MTP_OPERATION_GET_DEVICE_INFO:
+            response = doGetDeviceInfo();
+            break;
+        case MTP_OPERATION_OPEN_SESSION:
+            response = doOpenSession();
+            break;
+        case MTP_OPERATION_CLOSE_SESSION:
+            response = doCloseSession();
+            break;
+        case MTP_OPERATION_GET_STORAGE_IDS:
+            response = doGetStorageIDs();
+            break;
+         case MTP_OPERATION_GET_STORAGE_INFO:
+            response = doGetStorageInfo();
+            break;
+        case MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED:
+            response = doGetObjectPropsSupported();
+            break;
+        case MTP_OPERATION_GET_OBJECT_HANDLES:
+            response = doGetObjectHandles();
+            break;
+        case MTP_OPERATION_GET_OBJECT_PROP_VALUE:
+            response = doGetObjectPropValue();
+            break;
+        case MTP_OPERATION_GET_OBJECT_INFO:
+            response = doGetObjectInfo();
+            break;
+        case MTP_OPERATION_GET_OBJECT:
+            response = doGetObject();
+            break;
+        case MTP_OPERATION_SEND_OBJECT_INFO:
+            response = doSendObjectInfo();
+            break;
+        case MTP_OPERATION_SEND_OBJECT:
+            response = doSendObject();
+            break;
+        case MTP_OPERATION_DELETE_OBJECT:
+            response = doDeleteObject();
+            break;
+        case MTP_OPERATION_GET_OBJECT_PROP_DESC:
+            response = doGetObjectPropDesc();
+            break;
+        default:
+            response = MTP_RESPONSE_OPERATION_NOT_SUPPORTED;
+            break;
+    }
+
+    if (response == MTP_RESPONSE_TRANSACTION_CANCELLED)
+        return false;
+    mResponse.setResponseCode(response);
+    return true;
+}
+
+MtpResponseCode MtpServer::doGetDeviceInfo() {
+    MtpStringBuffer   string;
+    char prop_value[PROPERTY_VALUE_MAX];
+
+    // fill in device info
+    mData.putUInt16(MTP_STANDARD_VERSION);
+    mData.putUInt32(6); // MTP Vendor Extension ID
+    mData.putUInt16(MTP_STANDARD_VERSION);
+    string.set("microsoft.com: 1.0;");
+    mData.putString(string); // MTP Extensions
+    mData.putUInt16(0); //Functional Mode
+    mData.putAUInt16(kSupportedOperationCodes,
+            sizeof(kSupportedOperationCodes) / sizeof(uint16_t)); // Operations Supported
+    mData.putAUInt16(kSupportedEventCodes,
+            sizeof(kSupportedEventCodes) / sizeof(uint16_t)); // Events Supported
+    mData.putEmptyArray(); // Device Properties Supported
+    mData.putEmptyArray(); // Capture Formats
+    mData.putAUInt16(kSupportedPlaybackFormats,
+            sizeof(kSupportedPlaybackFormats) / sizeof(uint16_t)); // Playback Formats
+    // FIXME
+    string.set("Google, Inc.");
+    mData.putString(string);   // Manufacturer
+
+    property_get("ro.product.model", prop_value, "MTP Device");
+    string.set(prop_value);
+    mData.putString(string);   // Model
+    string.set("1.0");
+    mData.putString(string);   // Device Version
+
+    property_get("ro.serialno", prop_value, "????????");
+    string.set(prop_value);
+    mData.putString(string);   // Serial Number
+
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doOpenSession() {
+    if (mSessionOpen) {
+        mResponse.setParameter(1, mSessionID);
+        return MTP_RESPONSE_SESSION_ALREADY_OPEN;
+    }
+    mSessionID = mRequest.getParameter(1);
+    mSessionOpen = true;
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doCloseSession() {
+    if (!mSessionOpen)
+        return MTP_RESPONSE_SESSION_NOT_OPEN;
+    mSessionID = 0;
+    mSessionOpen = false;
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doGetStorageIDs() {
+    if (!mSessionOpen)
+        return MTP_RESPONSE_SESSION_NOT_OPEN;
+
+    int count = mStorages.size();
+    mData.putUInt32(count);
+    for (int i = 0; i < count; i++)
+        mData.putUInt32(mStorages[i]->getStorageID());
+
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doGetStorageInfo() {
+    MtpStringBuffer   string;
+
+    if (!mSessionOpen)
+        return MTP_RESPONSE_SESSION_NOT_OPEN;
+    MtpStorageID id = mRequest.getParameter(1);
+    MtpStorage* storage = getStorage(id);
+    if (!storage)
+        return MTP_RESPONSE_INVALID_STORAGE_ID;
+
+    mData.putUInt16(storage->getType());
+    mData.putUInt16(storage->getFileSystemType());
+    mData.putUInt16(storage->getAccessCapability());
+    mData.putUInt64(storage->getMaxCapacity());
+    mData.putUInt64(storage->getFreeSpace());
+    mData.putUInt32(1024*1024*1024); // Free Space in Objects
+    string.set(storage->getDescription());
+    mData.putString(string);
+    mData.putEmptyString();   // Volume Identifier
+
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doGetObjectPropsSupported() {
+    if (!mSessionOpen)
+        return MTP_RESPONSE_SESSION_NOT_OPEN;
+    MtpObjectFormat format = mRequest.getParameter(1);
+    mData.putAUInt16(kSupportedObjectProperties,
+            sizeof(kSupportedObjectProperties) / sizeof(uint16_t));
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doGetObjectHandles() {
+    if (!mSessionOpen)
+        return MTP_RESPONSE_SESSION_NOT_OPEN;
+    MtpStorageID storageID = mRequest.getParameter(1);      // 0xFFFFFFFF for all storage
+    MtpObjectFormat format = mRequest.getParameter(2);      // 0 for all formats
+    MtpObjectHandle parent = mRequest.getParameter(3);      // 0xFFFFFFFF for objects with no parent
+                                                            // 0x00000000 for all objects?
+    if (parent == 0xFFFFFFFF)
+        parent = 0;
+
+    MtpObjectHandleList* handles = mDatabase->getObjectList(storageID, format, parent);
+    mData.putAUInt32(handles);
+    delete handles;
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doGetObjectPropValue() {
+    MtpObjectHandle handle = mRequest.getParameter(1);
+    MtpObjectProperty property = mRequest.getParameter(2);
+
+    return mDatabase->getObjectProperty(handle, property, mData);
+}
+
+MtpResponseCode MtpServer::doGetObjectInfo() {
+    MtpObjectHandle handle = mRequest.getParameter(1);
+    return mDatabase->getObjectInfo(handle, mData);
+}
+
+MtpResponseCode MtpServer::doGetObject() {
+    MtpObjectHandle handle = mRequest.getParameter(1);
+    MtpString pathBuf;
+    int64_t fileLength;
+    if (!mDatabase->getObjectFilePath(handle, pathBuf, fileLength))
+        return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
+    const char* filePath = (const char *)pathBuf;
+
+    mtp_file_range  mfr;
+    mfr.fd = open(filePath, O_RDONLY);
+    if (mfr.fd < 0) {
+        return MTP_RESPONSE_GENERAL_ERROR;
+    }
+    mfr.offset = 0;
+    mfr.length = fileLength;
+
+    // send data header
+    mData.setOperationCode(mRequest.getOperationCode());
+    mData.setTransactionID(mRequest.getTransactionID());
+    mData.writeDataHeader(mFD, fileLength);
+
+    // then transfer the file
+    int ret = ioctl(mFD, MTP_SEND_FILE, (unsigned long)&mfr);
+    close(mfr.fd);
+    if (ret < 0) {
+        if (errno == ECANCELED)
+            return MTP_RESPONSE_TRANSACTION_CANCELLED;
+        else
+            return MTP_RESPONSE_GENERAL_ERROR;
+    }
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doSendObjectInfo() {
+    MtpString path;
+    MtpStorageID storageID = mRequest.getParameter(1);
+    MtpStorage* storage = getStorage(storageID);
+    MtpObjectHandle parent = mRequest.getParameter(2);
+    if (!storage)
+        return MTP_RESPONSE_INVALID_STORAGE_ID;
+
+    // special case the root
+    if (parent == MTP_PARENT_ROOT) {
+        path = storage->getPath();
+        parent = 0;
+    } else {
+        int64_t dummy;
+        if (!mDatabase->getObjectFilePath(parent, path, dummy))
+            return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
+    }
+
+    // read only the fields we need
+    mData.getUInt32();  // storage ID
+    MtpObjectFormat format = mData.getUInt16();
+    mData.getUInt16();  // protection status
+    mSendObjectFileSize = mData.getUInt32();
+    mData.getUInt16();  // thumb format
+    mData.getUInt32();  // thumb compressed size
+    mData.getUInt32();  // thumb pix width
+    mData.getUInt32();  // thumb pix height
+    mData.getUInt32();  // image pix width
+    mData.getUInt32();  // image pix height
+    mData.getUInt32();  // image bit depth
+    mData.getUInt32();  // parent
+    uint16_t associationType = mData.getUInt16();
+    uint32_t associationDesc = mData.getUInt32();   // association desc
+    mData.getUInt32();  // sequence number
+    MtpStringBuffer name, created, modified;
+    mData.getString(name);    // file name
+    mData.getString(created);      // date created
+    mData.getString(modified);     // date modified
+    // keywords follow
+
+    time_t modifiedTime;
+    if (!parseDateTime(modified, modifiedTime))
+        modifiedTime = 0;
+
+    if (path[path.size() - 1] != '/')
+        path += "/";
+    path += (const char *)name;
+
+    mDatabase->beginTransaction();
+    MtpObjectHandle handle = mDatabase->beginSendObject((const char*)path,
+            format, parent, storageID, mSendObjectFileSize, modifiedTime);
+    if (handle == kInvalidObjectHandle) {
+        mDatabase->rollbackTransaction();
+        return MTP_RESPONSE_GENERAL_ERROR;
+    }
+    mDatabase->commitTransaction();
+
+  if (format == MTP_FORMAT_ASSOCIATION) {
+        mode_t mask = umask(0);
+        int ret = mkdir((const char *)path, mDirectoryPermission);
+        umask(mask);
+        if (ret && ret != -EEXIST)
+            return MTP_RESPONSE_GENERAL_ERROR;
+        chown((const char *)path, getuid(), mFileGroup);
+    } else {
+        mSendObjectFilePath = path;
+        // save the handle for the SendObject call, which should follow
+        mSendObjectHandle = handle;
+        mSendObjectFormat = format;
+    }
+
+    mResponse.setParameter(1, storageID);
+    mResponse.setParameter(2, (parent == 0 ? 0xFFFFFFFF: parent));
+    mResponse.setParameter(3, handle);
+
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doSendObject() {
+    MtpResponseCode result = MTP_RESPONSE_OK;
+    mode_t mask;
+    int ret;
+
+    if (mSendObjectHandle == kInvalidObjectHandle) {
+        LOGE("Expected SendObjectInfo before SendObject");
+        result = MTP_RESPONSE_NO_VALID_OBJECT_INFO;
+        goto done;
+    }
+
+    // read the header
+    ret = mData.readDataHeader(mFD);
+    // FIXME - check for errors here.
+
+    // reset so we don't attempt to send this back
+    mData.reset();
+
+    mtp_file_range  mfr;
+    mfr.fd = open(mSendObjectFilePath, O_RDWR | O_CREAT | O_TRUNC);
+    if (mfr.fd < 0) {
+        result = MTP_RESPONSE_GENERAL_ERROR;
+        goto done;
+    }
+    fchown(mfr.fd, getuid(), mFileGroup);
+    // set permissions
+    mask = umask(0);
+    fchmod(mfr.fd, mFilePermission);
+    umask(mask);
+
+    mfr.offset = 0;
+    mfr.length = mSendObjectFileSize;
+
+    // transfer the file
+    ret = ioctl(mFD, MTP_RECEIVE_FILE, (unsigned long)&mfr);
+    close(mfr.fd);
+
+    LOGV("MTP_RECEIVE_FILE returned %d", ret);
+
+    if (ret < 0) {
+        unlink(mSendObjectFilePath);
+        if (errno == ECANCELED)
+            result = MTP_RESPONSE_TRANSACTION_CANCELLED;
+        else
+            result = MTP_RESPONSE_GENERAL_ERROR;
+    }
+
+done:
+    mDatabase->endSendObject(mSendObjectFilePath, mSendObjectHandle, mSendObjectFormat,
+            result == MTP_RESPONSE_OK);
+    mSendObjectHandle = kInvalidObjectHandle;
+    mSendObjectFormat = 0;
+    return result;
+}
+
+MtpResponseCode MtpServer::doDeleteObject() {
+    MtpObjectHandle handle = mRequest.getParameter(1);
+    MtpObjectFormat format = mRequest.getParameter(1);
+    // FIXME - support deleting all objects if handle is 0xFFFFFFFF
+    // FIXME - implement deleting objects by format
+    // FIXME - handle non-empty directories
+
+    MtpString filePath;
+    int64_t fileLength;
+    if (!mDatabase->getObjectFilePath(handle, filePath, fileLength))
+        return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
+
+    LOGV("deleting %s", (const char *)filePath);
+    // one of these should work
+    rmdir((const char *)filePath);
+    unlink((const char *)filePath);
+
+    mDatabase->deleteFile(handle);
+
+    return MTP_RESPONSE_OK;
+}
+
+MtpResponseCode MtpServer::doGetObjectPropDesc() {
+    MtpObjectProperty propCode = mRequest.getParameter(1);
+    MtpObjectFormat format = mRequest.getParameter(2);
+    MtpProperty* property = getObjectProperty(propCode);
+    if (!property)
+        return MTP_RESPONSE_OBJECT_PROP_NOT_SUPPORTED;
+
+    property->write(mData);
+    return MTP_RESPONSE_OK;
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpServer.h b/media/mtp/MtpServer.h
new file mode 100644
index 0000000..aff973a
--- /dev/null
+++ b/media/mtp/MtpServer.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2010 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 _MTP_SERVER_H
+#define _MTP_SERVER_H
+
+#include "MtpRequestPacket.h"
+#include "MtpDataPacket.h"
+#include "MtpResponsePacket.h"
+#include "MtpEventPacket.h"
+#include "mtp.h"
+
+#include "MtpUtils.h"
+
+namespace android {
+
+class MtpDatabase;
+class MtpProperty;
+class MtpStorage;
+
+class MtpServer {
+
+private:
+    // file descriptor for MTP kernel driver
+    int                 mFD;
+
+    MtpDatabase*        mDatabase;
+
+    // group to own new files and folders
+    int                 mFileGroup;
+    // permissions for new files and directories
+    int                 mFilePermission;
+    int                 mDirectoryPermission;
+
+    // current session ID
+    MtpSessionID        mSessionID;
+    // true if we have an open session and mSessionID is valid
+    bool                mSessionOpen;
+
+    MtpRequestPacket    mRequest;
+    MtpDataPacket       mData;
+    MtpResponsePacket   mResponse;
+    MtpEventPacket      mEvent;
+
+    MtpStorageList      mStorages;
+
+    MtpPropertyList     mObjectProperties;
+    MtpPropertyList     mDeviceProperties;
+
+    // handle for new object, set by SendObjectInfo and used by SendObject
+    MtpObjectHandle     mSendObjectHandle;
+    MtpObjectFormat     mSendObjectFormat;
+    MtpString           mSendObjectFilePath;
+    size_t              mSendObjectFileSize;
+
+public:
+                        MtpServer(int fd, MtpDatabase* database,
+                                    int fileGroup, int filePerm, int directoryPerm);
+    virtual             ~MtpServer();
+
+    void                addStorage(const char* filePath);
+    inline void         addStorage(MtpStorage* storage) { mStorages.push(storage); }
+    MtpStorage*         getStorage(MtpStorageID id);
+    void                run();
+
+    MtpProperty*        getObjectProperty(MtpPropertyCode propCode);
+    MtpProperty*        getDeviceProperty(MtpPropertyCode propCode);
+
+    void                sendObjectAdded(MtpObjectHandle handle);
+    void                sendObjectRemoved(MtpObjectHandle handle);
+
+private:
+    void                initObjectProperties();
+
+    bool                handleRequest();
+
+    MtpResponseCode     doGetDeviceInfo();
+    MtpResponseCode     doOpenSession();
+    MtpResponseCode     doCloseSession();
+    MtpResponseCode     doGetStorageIDs();
+    MtpResponseCode     doGetStorageInfo();
+    MtpResponseCode     doGetObjectPropsSupported();
+    MtpResponseCode     doGetObjectHandles();
+    MtpResponseCode     doGetObjectPropValue();
+    MtpResponseCode     doGetObjectInfo();
+    MtpResponseCode     doGetObject();
+    MtpResponseCode     doSendObjectInfo();
+    MtpResponseCode     doSendObject();
+    MtpResponseCode     doDeleteObject();
+    MtpResponseCode     doGetObjectPropDesc();
+};
+
+}; // namespace android
+
+#endif // _MTP_SERVER_H
diff --git a/media/mtp/MtpStorage.cpp b/media/mtp/MtpStorage.cpp
new file mode 100644
index 0000000..eccf186
--- /dev/null
+++ b/media/mtp/MtpStorage.cpp
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpStorage"
+
+#include "MtpDebug.h"
+#include "MtpDatabase.h"
+#include "MtpStorage.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/statfs.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <limits.h>
+
+namespace android {
+
+MtpStorage::MtpStorage(MtpStorageID id, const char* filePath, MtpDatabase* db)
+    :   mStorageID(id),
+        mFilePath(filePath),
+        mDatabase(db),
+        mMaxCapacity(0)
+{
+    LOGD("MtpStorage id: %d path: %s\n", id, filePath);
+}
+
+MtpStorage::~MtpStorage() {
+}
+
+int MtpStorage::getType() const {
+    return MTP_STORAGE_FIXED_RAM;
+}
+
+int MtpStorage::getFileSystemType() const {
+    return MTP_STORAGE_FILESYSTEM_HIERARCHICAL;
+}
+
+int MtpStorage::getAccessCapability() const {
+    return MTP_STORAGE_READ_WRITE;
+}
+
+uint64_t MtpStorage::getMaxCapacity() {
+    if (mMaxCapacity == 0) {
+        struct statfs   stat;
+        if (statfs(mFilePath, &stat))
+            return -1;
+        mMaxCapacity = (uint64_t)stat.f_blocks * (uint64_t)stat.f_bsize;
+    }
+    return mMaxCapacity;
+}
+
+uint64_t MtpStorage::getFreeSpace() {
+    struct statfs   stat;
+    if (statfs(mFilePath, &stat))
+        return -1;
+    return (uint64_t)stat.f_bavail * (uint64_t)stat.f_bsize;
+}
+
+const char* MtpStorage::getDescription() const {
+    return "Device Storage";
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpStorage.h b/media/mtp/MtpStorage.h
new file mode 100644
index 0000000..b13b926
--- /dev/null
+++ b/media/mtp/MtpStorage.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2010 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 _MTP_STORAGE_H
+#define _MTP_STORAGE_H
+
+#include "mtp.h"
+
+namespace android {
+
+class MtpDatabase;
+
+class MtpStorage {
+
+private:
+    MtpStorageID            mStorageID;
+    const char*             mFilePath;
+    MtpDatabase*            mDatabase;
+    uint64_t                mMaxCapacity;
+
+public:
+                            MtpStorage(MtpStorageID id, const char* filePath, MtpDatabase* db);
+    virtual                 ~MtpStorage();
+
+    inline MtpStorageID     getStorageID() const { return mStorageID; }
+    int                     getType() const;
+    int                     getFileSystemType() const;
+    int                     getAccessCapability() const;
+    uint64_t                getMaxCapacity();
+    uint64_t                getFreeSpace();
+    const char*             getDescription() const;
+    inline const char*      getPath() const { return mFilePath; }
+};
+
+}; // namespace android
+
+#endif // _MTP_STORAGE_H
diff --git a/media/mtp/MtpStorageInfo.cpp b/media/mtp/MtpStorageInfo.cpp
new file mode 100644
index 0000000..ca64ac0
--- /dev/null
+++ b/media/mtp/MtpStorageInfo.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpStorageInfo"
+
+#include "MtpDebug.h"
+#include "MtpDataPacket.h"
+#include "MtpStorageInfo.h"
+#include "MtpStringBuffer.h"
+
+namespace android {
+
+MtpStorageInfo::MtpStorageInfo(MtpStorageID id)
+    :   mStorageID(id),
+        mStorageType(0),
+        mFileSystemType(0),
+        mAccessCapability(0),
+        mMaxCapacity(0),
+        mFreeSpaceBytes(0),
+        mFreeSpaceObjects(0),
+        mStorageDescription(NULL),
+        mVolumeIdentifier(NULL)
+{
+}
+
+MtpStorageInfo::~MtpStorageInfo() {
+    if (mStorageDescription)
+        free(mStorageDescription);
+    if (mVolumeIdentifier)
+        free(mVolumeIdentifier);
+}
+
+void MtpStorageInfo::read(MtpDataPacket& packet) {
+    MtpStringBuffer string;
+
+    // read the device info
+    mStorageType = packet.getUInt16();
+    mFileSystemType = packet.getUInt16();
+    mAccessCapability = packet.getUInt16();
+    mMaxCapacity = packet.getUInt64();
+    mFreeSpaceBytes = packet.getUInt64();
+    mFreeSpaceObjects = packet.getUInt32();
+
+    packet.getString(string);
+    mStorageDescription = strdup((const char *)string);
+    packet.getString(string);
+    mVolumeIdentifier = strdup((const char *)string);
+}
+
+void MtpStorageInfo::print() {
+    LOGD("Storage Info %08X:\n\tmStorageType: %d\n\tmFileSystemType: %d\n\tmAccessCapability: %d\n",
+            mStorageID, mStorageType, mFileSystemType, mAccessCapability);
+    LOGD("\tmMaxCapacity: %lld\n\tmFreeSpaceBytes: %lld\n\tmFreeSpaceObjects: %d\n",
+            mMaxCapacity, mFreeSpaceBytes, mFreeSpaceObjects);
+    LOGD("\tmStorageDescription: %s\n\tmVolumeIdentifier: %s\n",
+            mStorageDescription, mVolumeIdentifier);
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpStorageInfo.h b/media/mtp/MtpStorageInfo.h
new file mode 100644
index 0000000..2cb626e
--- /dev/null
+++ b/media/mtp/MtpStorageInfo.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2010 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 _MTP_STORAGE_INFO_H
+#define _MTP_STORAGE_INFO_H
+
+#include "MtpTypes.h"
+
+namespace android {
+
+class MtpDataPacket;
+
+class MtpStorageInfo {
+public:
+    MtpStorageID        mStorageID;
+    uint16_t            mStorageType;
+    uint16_t            mFileSystemType;
+    uint16_t            mAccessCapability;
+    uint64_t            mMaxCapacity;
+    uint64_t            mFreeSpaceBytes;
+    uint32_t            mFreeSpaceObjects;
+    char*               mStorageDescription;
+    char*               mVolumeIdentifier;
+
+public:
+                        MtpStorageInfo(MtpStorageID id);
+    virtual             ~MtpStorageInfo();
+
+    void                read(MtpDataPacket& packet);
+
+    void                print();
+};
+
+}; // namespace android
+
+#endif // _MTP_STORAGE_INFO_H
diff --git a/media/mtp/MtpStringBuffer.cpp b/media/mtp/MtpStringBuffer.cpp
new file mode 100644
index 0000000..2d3cf69
--- /dev/null
+++ b/media/mtp/MtpStringBuffer.cpp
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpStringBuffer"
+
+#include <string.h>
+
+#include "MtpDataPacket.h"
+#include "MtpStringBuffer.h"
+
+namespace android {
+
+MtpStringBuffer::MtpStringBuffer()
+    :   mCharCount(0),
+        mByteCount(1)
+{
+    mBuffer[0] = 0;
+}
+
+MtpStringBuffer::MtpStringBuffer(const char* src)
+    :   mCharCount(0),
+        mByteCount(1)
+{
+    set(src);
+}
+
+MtpStringBuffer::MtpStringBuffer(const MtpStringBuffer& src)
+    :   mCharCount(src.mCharCount),
+        mByteCount(src.mByteCount)
+{
+    memcpy(mBuffer, src.mBuffer, mByteCount);
+}
+
+
+MtpStringBuffer::~MtpStringBuffer() {
+}
+
+void MtpStringBuffer::set(const char* src) {
+    int length = strlen(src);
+    if (length >= sizeof(mBuffer))
+        length = sizeof(mBuffer) - 1;
+    memcpy(mBuffer, src, length);
+
+    // count the characters
+    int count = 0;
+    char ch;
+    while ((ch = *src++) != 0) {
+        if ((ch & 0x80) == 0) {
+            // single byte character
+        } else if ((ch & 0xE0) == 0xC0) {
+            // two byte character
+            if (! *src++) {
+                // last character was truncated, so ignore last byte
+                length--;
+                break;
+            }
+        } else if ((ch & 0xF0) == 0xE0) {
+            // 3 byte char
+            if (! *src++) {
+                // last character was truncated, so ignore last byte
+                length--;
+                break;
+            }
+            if (! *src++) {
+                // last character was truncated, so ignore last two bytes
+                length -= 2;
+                break;
+            }
+        }
+        count++;
+    }
+
+    mByteCount = length + 1;
+    mBuffer[length] = 0;
+    mCharCount = count;
+}
+
+void MtpStringBuffer::readFromPacket(MtpDataPacket* packet) {
+    int count = packet->getUInt8();
+    uint8_t* dest = mBuffer;
+    for (int i = 0; i < count; i++) {
+        uint16_t ch = packet->getUInt16();
+        if (ch >= 0x0800) {
+            *dest++ = (uint8_t)(0xE0 | (ch >> 12));
+            *dest++ = (uint8_t)(0x80 | ((ch >> 6) & 0x3F));
+            *dest++ = (uint8_t)(0x80 | (ch & 0x3F));
+        } else if (ch >= 0x80) {
+            *dest++ = (uint8_t)(0xC0 | (ch >> 6));
+            *dest++ = (uint8_t)(0x80 | (ch & 0x3F));
+        } else {
+            *dest++ = ch;
+        }
+    }
+    *dest++ = 0;
+    mCharCount = count;
+    mByteCount = dest - mBuffer;
+}
+
+void MtpStringBuffer::writeToPacket(MtpDataPacket* packet) const {
+    int count = mCharCount;
+    const uint8_t* src = mBuffer;
+    packet->putUInt8(count);
+
+    // expand utf8 to 16 bit chars
+    for (int i = 0; i < count; i++) {
+        uint16_t ch;
+        uint16_t ch1 = *src++;
+        if ((ch1 & 0x80) == 0) {
+            // single byte character
+            ch = ch1;
+        } else if ((ch1 & 0xE0) == 0xC0) {
+            // two byte character
+            uint16_t ch2 = *src++;
+            ch = ((ch1 & 0x1F) << 6) | (ch2 & 0x3F);
+        } else {
+            // three byte character
+            uint16_t ch2 = *src++;
+            uint16_t ch3 = *src++;
+            ch = ((ch1 & 0x0F) << 12) | ((ch2 & 0x3F) << 6) | (ch3 & 0x3F);
+        }
+        packet->putUInt16(ch);
+    }
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpStringBuffer.h b/media/mtp/MtpStringBuffer.h
new file mode 100644
index 0000000..4641c3f
--- /dev/null
+++ b/media/mtp/MtpStringBuffer.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2010 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 _MTP_STRING_BUFFER_H
+#define _MTP_STRING_BUFFER_H
+
+#include <stdint.h>
+
+namespace android {
+
+class MtpDataPacket;
+
+// Represents a utf8 string, with a maximum of 255 characters
+class MtpStringBuffer {
+
+private:
+    // maximum 3 bytes/character, with 1 extra for zero termination
+    uint8_t         mBuffer[255 * 3 + 1];
+    int             mCharCount;
+    int             mByteCount;
+
+public:
+                    MtpStringBuffer();
+                    MtpStringBuffer(const char* src);
+                    MtpStringBuffer(const MtpStringBuffer& src);
+    virtual         ~MtpStringBuffer();
+
+    void            set(const char* src);
+
+    void            readFromPacket(MtpDataPacket* packet);
+    void            writeToPacket(MtpDataPacket* packet) const;
+
+    inline int      getCharCount() const { return mCharCount; }
+    inline int      getByteCount() const { return mByteCount; }
+
+	inline operator const char*() const { return (const char *)mBuffer; }
+};
+
+}; // namespace android
+
+#endif // _MTP_STRING_BUFFER_H
diff --git a/media/mtp/MtpTypes.h b/media/mtp/MtpTypes.h
new file mode 100644
index 0000000..2a895a7
--- /dev/null
+++ b/media/mtp/MtpTypes.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2010 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 _MTP_TYPES_H
+#define _MTP_TYPES_H
+
+#include <stdint.h>
+#include "utils/String8.h"
+#include "utils/Vector.h"
+
+namespace android {
+
+typedef int32_t int128_t[4];
+typedef uint32_t uint128_t[4];
+
+typedef uint16_t MtpOperationCode;
+typedef uint16_t MtpResponseCode;
+typedef uint16_t MtpEventCode;
+typedef uint32_t MtpSessionID;
+typedef uint32_t MtpStorageID;
+typedef uint32_t MtpTransactionID;
+typedef uint16_t MtpPropertyCode;
+typedef uint16_t MtpDataType;
+typedef uint16_t MtpObjectFormat;
+typedef MtpPropertyCode MtpDeviceProperty;
+typedef MtpPropertyCode MtpObjectProperty;
+
+// object handles are unique across all storage but only within a single session.
+// object handles cannot be reused after an object is deleted.
+// values 0x00000000 and 0xFFFFFFFF are reserved for special purposes.
+typedef uint32_t MtpObjectHandle;
+
+union MtpPropertyValue {
+    int8_t          i8;
+    uint8_t         u8;
+    int16_t         i16;
+    uint16_t        u16;
+    int32_t         i32;
+    uint32_t        u32;
+    int64_t         i64;
+    uint64_t        u64;
+    int128_t        i128;
+    uint128_t       u128;
+    char*           str;
+};
+
+// Special values
+#define MTP_PARENT_ROOT         0xFFFFFFFF       // parent is root of the storage
+#define kInvalidObjectHandle    0xFFFFFFFF
+
+class MtpStorage;
+class MtpDevice;
+class MtpProperty;
+
+typedef Vector<MtpStorage *> MtpStorageList;
+typedef Vector<MtpDevice*> MtpDeviceList;
+typedef Vector<MtpProperty*> MtpPropertyList;
+
+typedef Vector<uint8_t> UInt8List;
+typedef Vector<uint16_t> UInt16List;
+typedef Vector<uint32_t> UInt32List;
+typedef Vector<uint64_t> UInt64List;
+typedef Vector<int8_t> Int8List;
+typedef Vector<int16_t> Int16List;
+typedef Vector<int32_t> Int32List;
+typedef Vector<int64_t> Int64List;
+
+typedef UInt16List MtpDevicePropertyList;
+typedef UInt16List MtpObjectFormatList;
+typedef UInt32List MtpObjectHandleList;
+typedef UInt16List MtpObjectPropertyList;
+typedef UInt32List MtpStorageIDList;
+
+typedef String8    MtpString;
+
+}; // namespace android
+
+#endif // _MTP_TYPES_H
diff --git a/media/mtp/MtpUtils.cpp b/media/mtp/MtpUtils.cpp
new file mode 100644
index 0000000..ab01ef5
--- /dev/null
+++ b/media/mtp/MtpUtils.cpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2010 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_TAG "MtpUtils"
+
+#include <stdio.h>
+#include <time.h>
+
+#include <cutils/tztime.h>
+#include "MtpUtils.h"
+
+namespace android {
+
+/*
+DateTime strings follow a compatible subset of the definition found in ISO 8601, and
+take the form of a Unicode string formatted as: "YYYYMMDDThhmmss.s". In this
+representation, YYYY shall be replaced by the year, MM replaced by the month (01-12),
+DD replaced by the day (01-31), T is a constant character 'T' delimiting time from date,
+hh is replaced by the hour (00-23), mm is replaced by the minute (00-59), and ss by the
+second (00-59). The ".s" is optional, and represents tenths of a second.
+*/
+
+bool parseDateTime(const char* dateTime, time_t& outSeconds) {
+    int year, month, day, hour, minute, second;
+    struct tm tm;
+
+    if (sscanf(dateTime, "%04d%02d%02dT%02d%02d%02d",
+            &year, &month, &day, &hour, &minute, &second) != 6)
+        return false;
+    const char* tail = dateTime + 15;
+    // skip optional tenth of second
+    if (tail[0] == '.' && tail[1])
+        tail += 2;
+    //FIXME - support +/-hhmm
+    bool useUTC = (tail[0] == 'Z');
+
+    // hack to compute timezone
+    time_t dummy;
+    localtime_r(&dummy, &tm);
+
+    tm.tm_sec = second;
+    tm.tm_min = minute;
+    tm.tm_hour = hour;
+    tm.tm_mday = day;
+    tm.tm_mon = month;
+    tm.tm_year = year - 1900;
+    tm.tm_wday = 0;
+    tm.tm_isdst = -1;
+    if (useUTC)
+        outSeconds = mktime(&tm);
+    else
+        outSeconds = mktime_tz(&tm, tm.tm_zone);
+
+    return true;
+}
+
+void formatDateTime(time_t seconds, char* buffer, int bufferLength) {
+    struct tm tm;
+
+    localtime_r(&seconds, &tm);
+    snprintf(buffer, bufferLength, "%04d%02d%02dT%02d%02d%02d",
+        tm.tm_year + 1900, tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
+}
+
+}  // namespace android
diff --git a/media/mtp/MtpUtils.h b/media/mtp/MtpUtils.h
new file mode 100644
index 0000000..61f9055
--- /dev/null
+++ b/media/mtp/MtpUtils.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2010 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 _MTP_UTILS_H
+#define _MTP_UTILS_H
+
+#include <stdint.h>
+
+namespace android {
+
+bool parseDateTime(const char* dateTime, time_t& outSeconds);
+void formatDateTime(time_t seconds, char* buffer, int bufferLength);
+
+}; // namespace android
+
+#endif // _MTP_UTILS_H
diff --git a/media/mtp/mtp.h b/media/mtp/mtp.h
new file mode 100644
index 0000000..224cfb9
--- /dev/null
+++ b/media/mtp/mtp.h
@@ -0,0 +1,475 @@
+/*
+ * Copyright (C) 2010 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 _MTP_H
+#define _MTP_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#define MTP_STANDARD_VERSION            100
+
+// Container Types
+#define MTP_CONTAINER_TYPE_UNDEFINED    0
+#define MTP_CONTAINER_TYPE_COMMAND      1
+#define MTP_CONTAINER_TYPE_DATA         2
+#define MTP_CONTAINER_TYPE_RESPONSE     3
+#define MTP_CONTAINER_TYPE_EVENT        4
+
+// Container Offsets
+#define MTP_CONTAINER_LENGTH_OFFSET             0
+#define MTP_CONTAINER_TYPE_OFFSET               4
+#define MTP_CONTAINER_CODE_OFFSET               6
+#define MTP_CONTAINER_TRANSACTION_ID_OFFSET     8
+#define MTP_CONTAINER_PARAMETER_OFFSET          12
+#define MTP_CONTAINER_HEADER_SIZE               12
+
+// MTP Types
+#define MTP_TYPE_UNDEFINED      0x0000          // Undefined
+#define MTP_TYPE_INT8           0x0001          // Signed 8-bit integer
+#define MTP_TYPE_UINT8          0x0002          // Unsigned 8-bit integer
+#define MTP_TYPE_INT16          0x0003          // Signed 16-bit integer
+#define MTP_TYPE_UINT16         0x0004          // Unsigned 16-bit integer
+#define MTP_TYPE_INT32          0x0005          // Signed 32-bit integer
+#define MTP_TYPE_UINT32         0x0006          // Unsigned 32-bit integer
+#define MTP_TYPE_INT64          0x0007          // Signed 64-bit integer
+#define MTP_TYPE_UINT64         0x0008          // Unsigned 64-bit integer
+#define MTP_TYPE_INT128         0x0009          // Signed 128-bit integer
+#define MTP_TYPE_UINT128        0x000A          // Unsigned 128-bit integer
+#define MTP_TYPE_AINT8          0x4001          // Array of signed 8-bit integers
+#define MTP_TYPE_AUINT8         0x4002          // Array of unsigned 8-bit integers
+#define MTP_TYPE_AINT16         0x4003          // Array of signed 16-bit integers
+#define MTP_TYPE_AUINT16        0x4004          // Array of unsigned 16-bit integers
+#define MTP_TYPE_AINT32         0x4005          // Array of signed 32-bit integers
+#define MTP_TYPE_AUINT32        0x4006          // Array of unsigned 32-bit integers
+#define MTP_TYPE_AINT64         0x4007          // Array of signed 64-bit integers
+#define MTP_TYPE_AUINT64        0x4008          // Array of unsigned 64-bit integers
+#define MTP_TYPE_AINT128        0x4009          // Array of signed 128-bit integers
+#define MTP_TYPE_AUINT128       0x400A          // Array of unsigned 128-bit integers
+#define MTP_TYPE_STR            0xFFFF          // Variable-length Unicode string
+
+// MTP Format Codes
+#define MTP_FORMAT_UNDEFINED                            0x3000   // Undefined object
+#define MTP_FORMAT_ASSOCIATION                          0x3001   // Association (for example, a folder)
+#define MTP_FORMAT_SCRIPT                               0x3002   // Device model-specific script
+#define MTP_FORMAT_EXECUTABLE                           0x3003   // Device model-specific binary executable
+#define MTP_FORMAT_TEXT                                 0x3004   // Text file
+#define MTP_FORMAT_HTML                                 0x3005   // Hypertext Markup Language file (text)
+#define MTP_FORMAT_DPOF                                 0x3006   // Digital Print Order Format file (text)
+#define MTP_FORMAT_AIFF                                 0x3007   // Audio clip
+#define MTP_FORMAT_WAV                                  0x3008   // Audio clip
+#define MTP_FORMAT_MP3                                  0x3009   // Audio clip
+#define MTP_FORMAT_AVI                                  0x300A   // Video clip
+#define MTP_FORMAT_MPEG                                 0x300B   // Video clip
+#define MTP_FORMAT_ASF                                  0x300C   // Microsoft Advanced Streaming Format (video)
+#define MTP_FORMAT_DEFINED                              0x3800   // Unknown image object
+#define MTP_FORMAT_EXIF_JPEG                            0x3801   // Exchangeable File Format, JEIDA standard
+#define MTP_FORMAT_TIFF_EP                              0x3802   // Tag Image File Format for Electronic Photography
+#define MTP_FORMAT_FLASHPIX                             0x3803   // Structured Storage Image Format
+#define MTP_FORMAT_BMP                                  0x3804   // Microsoft Windows Bitmap file
+#define MTP_FORMAT_CIFF                                 0x3805   // Canon Camera Image File Format
+#define MTP_FORMAT_GIF                                  0x3807   // Graphics Interchange Format
+#define MTP_FORMAT_JFIF                                 0x3808   // JPEG File Interchange Format
+#define MTP_FORMAT_CD                                   0x3809   // PhotoCD Image Pac
+#define MTP_FORMAT_PICT                                 0x380A   // Quickdraw Image Format
+#define MTP_FORMAT_PNG                                  0x380B   // Portable Network Graphics
+#define MTP_FORMAT_TIFF                                 0x380D   // Tag Image File Format
+#define MTP_FORMAT_TIFF_IT                              0x380E   // Tag Image File Format for Information Technology (graphic arts)
+#define MTP_FORMAT_JP2                                  0x380F   // JPEG2000 Baseline File Format
+#define MTP_FORMAT_JPX                                  0x3810   // JPEG2000 Extended File Format
+#define MTP_FORMAT_UNDEFINED_FIRMWARE                   0xB802
+#define MTP_FORMAT_WINDOWS_IMAGE_FORMAT                 0xB881
+#define MTP_FORMAT_UNDEFINED_AUDIO                      0xB900
+#define MTP_FORMAT_WMA                                  0xB901
+#define MTP_FORMAT_OGG                                  0xB902
+#define MTP_FORMAT_AAC                                  0xB903
+#define MTP_FORMAT_AUDIBLE                              0xB904
+#define MTP_FORMAT_FLAC                                 0xB906
+#define MTP_FORMAT_UNDEFINED_VIDEO                      0xB980
+#define MTP_FORMAT_WMV                                  0xB981
+#define MTP_FORMAT_MP4_CONTAINER                        0xB982  // ISO 14496-1
+#define MTP_FORMAT_MP2                                  0xB983
+#define MTP_FORMAT_3GP_CONTAINER                        0xB984  // 3GPP file format. Details: http://www.3gpp.org/ftp/Specs/html-info/26244.htm (page title - \u201cTransparent end-to-end packet switched streaming service, 3GPP file format\u201d).
+#define MTP_FORMAT_UNDEFINED_COLLECTION                 0xBA00
+#define MTP_FORMAT_ABSTRACT_MULTIMEDIA_ALBUM            0xBA01
+#define MTP_FORMAT_ABSTRACT_IMAGE_ALBUM                 0xBA02
+#define MTP_FORMAT_ABSTRACT_AUDIO_ALBUM                 0xBA03
+#define MTP_FORMAT_ABSTRACT_VIDEO_ALBUM                 0xBA04
+#define MTP_FORMAT_ABSTRACT_AV_PLAYLIST                 0xBA05
+#define MTP_FORMAT_ABSTRACT_CONTACT_GROUP               0xBA06
+#define MTP_FORMAT_ABSTRACT_MESSAGE_FOLDER              0xBA07
+#define MTP_FORMAT_ABSTRACT_CHAPTERED_PRODUCTION        0xBA08
+#define MTP_FORMAT_ABSTRACT_AUDIO_PLAYLIST              0xBA09
+#define MTP_FORMAT_ABSTRACT_VIDEO_PLAYLIST              0xBA0A
+#define MTP_FORMAT_ABSTRACT_MEDIACAST                   0xBA0B // For use with mediacasts; references multimedia enclosures of RSS feeds or episodic content
+#define MTP_FORMAT_WPL_PLAYLIST                         0xBA10
+#define MTP_FORMAT_M3U_PLAYLIST                         0xBA11
+#define MTP_FORMAT_MPL_PLAYLIST                         0xBA12
+#define MTP_FORMAT_ASX_PLAYLIST                         0xBA13
+#define MTP_FORMAT_PLS_PLAYLIST                         0xBA14
+#define MTP_FORMAT_UNDEFINED_DOCUMENT                   0xBA80
+#define MTP_FORMAT_ABSTRACT_DOCUMENT                    0xBA81
+#define MTP_FORMAT_XML_DOCUMENT                         0xBA82
+#define MTP_FORMAT_MS_WORD_DOCUMENT                     0xBA83
+#define MTP_FORMAT_MHT_COMPILED_HTML_DOCUMENT           0xBA84
+#define MTP_FORMAT_MS_EXCEL_SPREADSHEET                 0xBA85
+#define MTP_FORMAT_MS_POWERPOINT_PRESENTATION           0xBA86
+#define MTP_FORMAT_UNDEFINED_MESSAGE                    0xBB00
+#define MTP_FORMAT_ABSTRACT_MESSSAGE                    0xBB01
+#define MTP_FORMAT_UNDEFINED_CONTACT                    0xBB80
+#define MTP_FORMAT_ABSTRACT_CONTACT                     0xBB81
+#define MTP_FORMAT_VCARD_2                              0xBB82
+
+// MTP Object Property Codes
+#define MTP_PROPERTY_STORAGE_ID                             0xDC01
+#define MTP_PROPERTY_OBJECT_FORMAT                          0xDC02
+#define MTP_PROPERTY_PROTECTION_STATUS                      0xDC03
+#define MTP_PROPERTY_OBJECT_SIZE                            0xDC04
+#define MTP_PROPERTY_ASSOCIATION_TYPE                       0xDC05
+#define MTP_PROPERTY_ASSOCIATION_DESC                       0xDC06
+#define MTP_PROPERTY_OBJECT_FILE_NAME                       0xDC07
+#define MTP_PROPERTY_DATE_CREATED                           0xDC08
+#define MTP_PROPERTY_DATE_MODIFIED                          0xDC09
+#define MTP_PROPERTY_KEYWORDS                               0xDC0A
+#define MTP_PROPERTY_PARENT_OBJECT                          0xDC0B
+#define MTP_PROPERTY_ALLOWED_FOLDER_CONTENTS                0xDC0C
+#define MTP_PROPERTY_HIDDEN                                 0xDC0D
+#define MTP_PROPERTY_SYSTEM_OBJECT                          0xDC0E
+#define MTP_PROPERTY_PERSISTENT_UID                         0xDC41
+#define MTP_PROPERTY_SYNC_ID                                0xDC42
+#define MTP_PROPERTY_PROPERTY_BAG                           0xDC43
+#define MTP_PROPERTY_NAME                                   0xDC44
+#define MTP_PROPERTY_CREATED_BY                             0xDC45
+#define MTP_PROPERTY_ARTIST                                 0xDC46
+#define MTP_PROPERTY_DATE_AUTHORED                          0xDC47
+#define MTP_PROPERTY_DESCRIPTION                            0xDC48
+#define MTP_PROPERTY_URL_REFERENCE                          0xDC49
+#define MTP_PROPERTY_LANGUAGE_LOCALE                        0xDC4A
+#define MTP_PROPERTY_COPYRIGHT_INFORMATION                  0xDC4B
+#define MTP_PROPERTY_SOURCE                                 0xDC4C
+#define MTP_PROPERTY_ORIGIN_LOCATION                        0xDC4D
+#define MTP_PROPERTY_DATE_ADDED                             0xDC4E
+#define MTP_PROPERTY_NON_CONSUMABLE                         0xDC4F
+#define MTP_PROPERTY_CORRUPT_UNPLAYABLE                     0xDC50
+#define MTP_PROPERTY_PRODUCER_SERIAL_NUMBER                 0xDC51
+#define MTP_PROPERTY_REPRESENTATIVE_SAMPLE_FORMAT           0xDC81
+#define MTP_PROPERTY_REPRESENTATIVE_SAMPLE_SIZE             0xDC82
+#define MTP_PROPERTY_REPRESENTATIVE_SAMPLE_HEIGHT           0xDC83
+#define MTP_PROPERTY_REPRESENTATIVE_SAMPLE_WIDTH            0xDC84
+#define MTP_PROPERTY_REPRESENTATIVE_SAMPLE_DURATION         0xDC85
+#define MTP_PROPERTY_REPRESENTATIVE_SAMPLE_DATA             0xDC86
+#define MTP_PROPERTY_WIDTH                                  0xDC87
+#define MTP_PROPERTY_HEIGHT                                 0xDC88
+#define MTP_PROPERTY_DURATION                               0xDC89
+#define MTP_PROPERTY_RATING                                 0xDC8A
+#define MTP_PROPERTY_TRACK                                  0xDC8B
+#define MTP_PROPERTY_GENRE                                  0xDC8C
+#define MTP_PROPERTY_CREDITS                                0xDC8D
+#define MTP_PROPERTY_LYRICS                                 0xDC8E
+#define MTP_PROPERTY_SUBSCRIPTION_CONTENT_ID                0xDC8F
+#define MTP_PROPERTY_PRODUCED_BY                            0xDC90
+#define MTP_PROPERTY_USE_COUNT                              0xDC91
+#define MTP_PROPERTY_SKIP_COUNT                             0xDC92
+#define MTP_PROPERTY_LAST_ACCESSED                          0xDC93
+#define MTP_PROPERTY_PARENTAL_RATING                        0xDC94
+#define MTP_PROPERTY_META_GENRE                             0xDC95
+#define MTP_PROPERTY_COMPOSER                               0xDC96
+#define MTP_PROPERTY_EFFECTIVE_RATING                       0xDC97
+#define MTP_PROPERTY_SUBTITLE                               0xDC98
+#define MTP_PROPERTY_ORIGINAL_RELEASE_DATE                  0xDC99
+#define MTP_PROPERTY_ALBUM_NAME                             0xDC9A
+#define MTP_PROPERTY_ALBUM_ARTIST                           0xDC9B
+#define MTP_PROPERTY_MOOD                                   0xDC9C
+#define MTP_PROPERTY_DRM_STATUS                             0xDC9D
+#define MTP_PROPERTY_SUB_DESCRIPTION                        0xDC9E
+#define MTP_PROPERTY_IS_CROPPED                             0xDCD1
+#define MTP_PROPERTY_IS_COLOUR_CORRECTED                    0xDCD2
+#define MTP_PROPERTY_IMAGE_BIT_DEPTH                        0xDCD3
+#define MTP_PROPERTY_F_NUMBER                               0xDCD4
+#define MTP_PROPERTY_EXPOSURE_TIME                          0xDCD5
+#define MTP_PROPERTY_EXPOSURE_INDEX                         0xDCD6
+#define MTP_PROPERTY_TOTAL_BITRATE                          0xDE91
+#define MTP_PROPERTY_BITRATE_TYPE                           0xDE92
+#define MTP_PROPERTY_SAMPLE_RATE                            0xDE93
+#define MTP_PROPERTY_NUMBER_OF_CHANNELS                     0xDE94
+#define MTP_PROPERTY_AUDIO_BIT_DEPTH                        0xDE95
+#define MTP_PROPERTY_SCAN_TYPE                              0xDE97
+#define MTP_PROPERTY_AUDIO_WAVE_CODEC                       0xDE99
+#define MTP_PROPERTY_AUDIO_BITRATE                          0xDE9A
+#define MTP_PROPERTY_VIDEO_FOURCC_CODEC                     0xDE9B
+#define MTP_PROPERTY_VIDEO_BITRATE                          0xDE9C
+#define MTP_PROPERTY_FRAMES_PER_THOUSAND_SECONDS            0xDE9D
+#define MTP_PROPERTY_KEYFRAME_DISTANCE                      0xDE9E
+#define MTP_PROPERTY_BUFFER_SIZE                            0xDE9F
+#define MTP_PROPERTY_ENCODING_QUALITY                       0xDEA0
+#define MTP_PROPERTY_ENCODING_PROFILE                       0xDEA1
+#define MTP_PROPERTY_DISPLAY_NAME                           0xDCE0
+#define MTP_PROPERTY_BODY_TEXT                              0xDCE1
+#define MTP_PROPERTY_SUBJECT                                0xDCE2
+#define MTP_PROPERTY_PRIORITY                               0xDCE3
+#define MTP_PROPERTY_GIVEN_NAME                             0xDD00
+#define MTP_PROPERTY_MIDDLE_NAMES                           0xDD01
+#define MTP_PROPERTY_FAMILY_NAME                            0xDD02
+#define MTP_PROPERTY_PREFIX                                 0xDD03
+#define MTP_PROPERTY_SUFFIX                                 0xDD04
+#define MTP_PROPERTY_PHONETIC_GIVEN_NAME                    0xDD05
+#define MTP_PROPERTY_PHONETIC_FAMILY_NAME                   0xDD06
+#define MTP_PROPERTY_EMAIL_PRIMARY                          0xDD07
+#define MTP_PROPERTY_EMAIL_PERSONAL_1                       0xDD08
+#define MTP_PROPERTY_EMAIL_PERSONAL_2                       0xDD09
+#define MTP_PROPERTY_EMAIL_BUSINESS_1                       0xDD0A
+#define MTP_PROPERTY_EMAIL_BUSINESS_2                       0xDD0B
+#define MTP_PROPERTY_EMAIL_OTHERS                           0xDD0C
+#define MTP_PROPERTY_PHONE_NUMBER_PRIMARY                   0xDD0D
+#define MTP_PROPERTY_PHONE_NUMBER_PERSONAL                  0xDD0E
+#define MTP_PROPERTY_PHONE_NUMBER_PERSONAL_2                0xDD0F
+#define MTP_PROPERTY_PHONE_NUMBER_BUSINESS                  0xDD10
+#define MTP_PROPERTY_PHONE_NUMBER_BUSINESS_2                0xDD11
+#define MTP_PROPERTY_PHONE_NUMBER_MOBILE                    0xDD12
+#define MTP_PROPERTY_PHONE_NUMBER_MOBILE_2                  0xDD13
+#define MTP_PROPERTY_FAX_NUMBER_PRIMARY                     0xDD14
+#define MTP_PROPERTY_FAX_NUMBER_PERSONAL                    0xDD15
+#define MTP_PROPERTY_FAX_NUMBER_BUSINESS                    0xDD16
+#define MTP_PROPERTY_PAGER_NUMBER                           0xDD17
+#define MTP_PROPERTY_PHONE_NUMBER_OTHERS                    0xDD18
+#define MTP_PROPERTY_PRIMARY_WEB_ADDRESS                    0xDD19
+#define MTP_PROPERTY_PERSONAL_WEB_ADDRESS                   0xDD1A
+#define MTP_PROPERTY_BUSINESS_WEB_ADDRESS                   0xDD1B
+#define MTP_PROPERTY_INSTANT_MESSANGER_ADDRESS              0xDD1C
+#define MTP_PROPERTY_INSTANT_MESSANGER_ADDRESS_2            0xDD1D
+#define MTP_PROPERTY_INSTANT_MESSANGER_ADDRESS_3            0xDD1E
+#define MTP_PROPERTY_POSTAL_ADDRESS_PERSONAL_FULL           0xDD1F
+#define MTP_PROPERTY_POSTAL_ADDRESS_PERSONAL_LINE_1         0xDD20
+#define MTP_PROPERTY_POSTAL_ADDRESS_PERSONAL_LINE_2         0xDD21
+#define MTP_PROPERTY_POSTAL_ADDRESS_PERSONAL_CITY           0xDD22
+#define MTP_PROPERTY_POSTAL_ADDRESS_PERSONAL_REGION         0xDD23
+#define MTP_PROPERTY_POSTAL_ADDRESS_PERSONAL_POSTAL_CODE    0xDD24
+#define MTP_PROPERTY_POSTAL_ADDRESS_PERSONAL_COUNTRY        0xDD25
+#define MTP_PROPERTY_POSTAL_ADDRESS_BUSINESS_FULL           0xDD26
+#define MTP_PROPERTY_POSTAL_ADDRESS_BUSINESS_LINE_1         0xDD27
+#define MTP_PROPERTY_POSTAL_ADDRESS_BUSINESS_LINE_2         0xDD28
+#define MTP_PROPERTY_POSTAL_ADDRESS_BUSINESS_CITY           0xDD29
+#define MTP_PROPERTY_POSTAL_ADDRESS_BUSINESS_REGION         0xDD2A
+#define MTP_PROPERTY_POSTAL_ADDRESS_BUSINESS_POSTAL_CODE    0xDD2B
+#define MTP_PROPERTY_POSTAL_ADDRESS_BUSINESS_COUNTRY        0xDD2C
+#define MTP_PROPERTY_POSTAL_ADDRESS_OTHER_FULL              0xDD2D
+#define MTP_PROPERTY_POSTAL_ADDRESS_OTHER_LINE_1            0xDD2E
+#define MTP_PROPERTY_POSTAL_ADDRESS_OTHER_LINE_2            0xDD2F
+#define MTP_PROPERTY_POSTAL_ADDRESS_OTHER_CITY              0xDD30
+#define MTP_PROPERTY_POSTAL_ADDRESS_OTHER_REGION            0xDD31
+#define MTP_PROPERTY_POSTAL_ADDRESS_OTHER_POSTAL_CODE       0xDD32
+#define MTP_PROPERTY_POSTAL_ADDRESS_OTHER_COUNTRY           0xDD33
+#define MTP_PROPERTY_ORGANIZATION_NAME                      0xDD34
+#define MTP_PROPERTY_PHONETIC_ORGANIZATION_NAME             0xDD35
+#define MTP_PROPERTY_ROLE                                   0xDD36
+#define MTP_PROPERTY_BIRTHDATE                              0xDD37
+#define MTP_PROPERTY_MESSAGE_TO                             0xDD40
+#define MTP_PROPERTY_MESSAGE_CC                             0xDD41
+#define MTP_PROPERTY_MESSAGE_BCC                            0xDD42
+#define MTP_PROPERTY_MESSAGE_READ                           0xDD43
+#define MTP_PROPERTY_MESSAGE_RECEIVED_TIME                  0xDD44
+#define MTP_PROPERTY_MESSAGE_SENDER                         0xDD45
+#define MTP_PROPERTY_ACTIVITY_BEGIN_TIME                    0xDD50
+#define MTP_PROPERTY_ACTIVITY_END_TIME                      0xDD51
+#define MTP_PROPERTY_ACTIVITY_LOCATION                      0xDD52
+#define MTP_PROPERTY_ACTIVITY_REQUIRED_ATTENDEES            0xDD54
+#define MTP_PROPERTY_ACTIVITY_OPTIONAL_ATTENDEES            0xDD55
+#define MTP_PROPERTY_ACTIVITY_RESOURCES                     0xDD56
+#define MTP_PROPERTY_ACTIVITY_ACCEPTED                      0xDD57
+#define MTP_PROPERTY_ACTIVITY_TENTATIVE                     0xDD58
+#define MTP_PROPERTY_ACTIVITY_DECLINED                      0xDD59
+#define MTP_PROPERTY_ACTIVITY_REMAINDER_TIME                0xDD5A
+#define MTP_PROPERTY_ACTIVITY_OWNER                         0xDD5B
+#define MTP_PROPERTY_ACTIVITY_STATUS                        0xDD5C
+#define MTP_PROPERTY_OWNER                                  0xDD5D
+#define MTP_PROPERTY_EDITOR                                 0xDD5E
+#define MTP_PROPERTY_WEBMASTER                              0xDD5F
+#define MTP_PROPERTY_URL_SOURCE                             0xDD60
+#define MTP_PROPERTY_URL_DESTINATION                        0xDD61
+#define MTP_PROPERTY_TIME_BOOKMARK                          0xDD62
+#define MTP_PROPERTY_OBJECT_BOOKMARK                        0xDD63
+#define MTP_PROPERTY_BYTE_BOOKMARK                          0xDD64
+#define MTP_PROPERTY_LAST_BUILD_DATE                        0xDD70
+#define MTP_PROPERTY_TIME_TO_LIVE                           0xDD71
+#define MTP_PROPERTY_MEDIA_GUID                             0xDD72
+
+// MTP Device Property Codes
+#define MTP_DEVICE_PROPERTY_UNDEFINED                       0x5000
+#define MTP_DEVICE_PROPERTY_BATTERY_LEVEL                   0x5001
+#define MTP_DEVICE_PROPERTY_FUNCTIONAL_MODE                 0x5002
+#define MTP_DEVICE_PROPERTY_IMAGE_SIZE                      0x5003
+#define MTP_DEVICE_PROPERTY_COMPRESSION_SETTING             0x5004
+#define MTP_DEVICE_PROPERTY_WHITE_BALANCE                   0x5005
+#define MTP_DEVICE_PROPERTY_RGB_GAIN                        0x5006
+#define MTP_DEVICE_PROPERTY_F_NUMBER                        0x5007
+#define MTP_DEVICE_PROPERTY_FOCAL_LENGTH                    0x5008
+#define MTP_DEVICE_PROPERTY_FOCUS_DISTANCE                  0x5009
+#define MTP_DEVICE_PROPERTY_FOCUS_MODE                      0x500A
+#define MTP_DEVICE_PROPERTY_EXPOSURE_METERING_MODE          0x500B
+#define MTP_DEVICE_PROPERTY_FLASH_MODE                      0x500C
+#define MTP_DEVICE_PROPERTY_EXPOSURE_TIME                   0x500D
+#define MTP_DEVICE_PROPERTY_EXPOSURE_PROGRAM_MODE           0x500E
+#define MTP_DEVICE_PROPERTY_EXPOSURE_INDEX                  0x500F
+#define MTP_DEVICE_PROPERTY_EXPOSURE_BIAS_COMPENSATION      0x5010
+#define MTP_DEVICE_PROPERTY_DATETIME                        0x5011
+#define MTP_DEVICE_PROPERTY_CAPTURE_DELAY                   0x5012
+#define MTP_DEVICE_PROPERTY_STILL_CAPTURE_MODE              0x5013
+#define MTP_DEVICE_PROPERTY_CONTRAST                        0x5014
+#define MTP_DEVICE_PROPERTY_SHARPNESS                       0x5015
+#define MTP_DEVICE_PROPERTY_DIGITAL_ZOOM                    0x5016
+#define MTP_DEVICE_PROPERTY_EFFECT_MODE                     0x5017
+#define MTP_DEVICE_PROPERTY_BURST_NUMBER                    0x5018
+#define MTP_DEVICE_PROPERTY_BURST_INTERVAL                  0x5019
+#define MTP_DEVICE_PROPERTY_TIMELAPSE_NUMBER                0x501A
+#define MTP_DEVICE_PROPERTY_TIMELAPSE_INTERVAL              0x501B
+#define MTP_DEVICE_PROPERTY_FOCUS_METERING_MODE             0x501C
+#define MTP_DEVICE_PROPERTY_UPLOAD_URL                      0x501D
+#define MTP_DEVICE_PROPERTY_ARTIST                          0x501E
+#define MTP_DEVICE_PROPERTY_COPYRIGHT_INFO                  0x501F
+#define MTP_DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER         0xD401
+#define MTP_DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME            0xD402
+#define MTP_DEVICE_PROPERTY_VOLUME                          0xD403
+#define MTP_DEVICE_PROPERTY_SUPPORTED_FORMATS_ORDERED       0xD404
+#define MTP_DEVICE_PROPERTY_DEVICE_ICON                     0xD405
+#define MTP_DEVICE_PROPERTY_PLAYBACK_RATE                   0xD410
+#define MTP_DEVICE_PROPERTY_PLAYBACK_OBJECT                 0xD411
+#define MTP_DEVICE_PROPERTY_PLAYBACK_CONTAINER_INDEX        0xD412
+#define MTP_DEVICE_PROPERTY_SESSION_INITIATOR_VERSION_INFO  0xD406
+#define MTP_DEVICE_PROPERTY_PERCEIVED_DEVICE_TYPE           0xD407
+
+// MTP Operation Codes
+#define MTP_OPERATION_GET_DEVICE_INFO                       0x1001
+#define MTP_OPERATION_OPEN_SESSION                          0x1002
+#define MTP_OPERATION_CLOSE_SESSION                         0x1003
+#define MTP_OPERATION_GET_STORAGE_IDS                       0x1004
+#define MTP_OPERATION_GET_STORAGE_INFO                      0x1005
+#define MTP_OPERATION_GET_NUM_OBJECTS                       0x1006
+#define MTP_OPERATION_GET_OBJECT_HANDLES                    0x1007
+#define MTP_OPERATION_GET_OBJECT_INFO                       0x1008
+#define MTP_OPERATION_GET_OBJECT                            0x1009
+#define MTP_OPERATION_GET_THUMB                             0x100A
+#define MTP_OPERATION_DELETE_OBJECT                         0x100B
+#define MTP_OPERATION_SEND_OBJECT_INFO                      0x100C
+#define MTP_OPERATION_SEND_OBJECT                           0x100D
+#define MTP_OPERATION_INITIATE_CAPTURE                      0x100E
+#define MTP_OPERATION_FORMAT_STORE                          0x100F
+#define MTP_OPERATION_RESET_DEVICE                          0x1010
+#define MTP_OPERATION_SELF_TEST                             0x1011
+#define MTP_OPERATION_SET_OBJECT_PROTECTION                 0x1012
+#define MTP_OPERATION_POWER_DOWN                            0x1013
+#define MTP_OPERATION_GET_DEVICE_PROP_DESC                  0x1014
+#define MTP_OPERATION_GET_DEVICE_PROP_VALUE                 0x1015
+#define MTP_OPERATION_SET_DEVICE_PROP_VALUE                 0x1016
+#define MTP_OPERATION_RESET_DEVICE_PROP_VALUE               0x1017
+#define MTP_OPERATION_TERMINATE_OPEN_CAPTURE                0x1018
+#define MTP_OPERATION_MOVE_OBJECT                           0x1019
+#define MTP_OPERATION_COPY_OBJECT                           0x101A
+#define MTP_OPERATION_GET_PARTIAL_OBJECT                    0x101B
+#define MTP_OPERATION_INITIATE_OPEN_CAPTURE                 0x101C
+#define MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED            0x9801
+#define MTP_OPERATION_GET_OBJECT_PROP_DESC                  0x9802
+#define MTP_OPERATION_GET_OBJECT_PROP_VALUE                 0x9803
+#define MTP_OPERATION_SET_OBJECT_PROP_VALUE                 0x9804
+#define MTP_OPERATION_GET_OBJECT_REFERENCES                 0x9810
+#define MTP_OPERATION_SET_OBJECT_REFERENCES                 0x9811
+#define MTP_OPERATION_SKIP                                  0x9820
+
+// MTP Response Codes
+#define MTP_RESPONSE_UNDEFINED                                  0x2000
+#define MTP_RESPONSE_OK                                         0x2001
+#define MTP_RESPONSE_GENERAL_ERROR                              0x2002
+#define MTP_RESPONSE_SESSION_NOT_OPEN                           0x2003
+#define MTP_RESPONSE_INVALID_TRANSACTION_ID                     0x2004
+#define MTP_RESPONSE_OPERATION_NOT_SUPPORTED                    0x2005
+#define MTP_RESPONSE_PARAMETER_NOT_SUPPORTED                    0x2006
+#define MTP_RESPONSE_INCOMPLETE_TRANSFER                        0x2007
+#define MTP_RESPONSE_INVALID_STORAGE_ID                         0x2008
+#define MTP_RESPONSE_INVALID_OBJECT_HANDLE                      0x2009
+#define MTP_RESPONSE_DEVICE_PROP_NOT_SUPPORTED                  0x200A
+#define MTP_RESPONSE_INVALID_OBJECT_FORMAT_CODE                 0x200B
+#define MTP_RESPONSE_STORAGE_FULL                               0x200C
+#define MTP_RESPONSE_OBJECT_WRITE_PROTECTED                     0x200D
+#define MTP_RESPONSE_STORE_READ_ONLY                            0x200E
+#define MTP_RESPONSE_ACCESS_DENIED                              0x200F
+#define MTP_RESPONSE_NO_THUMBNAIL_PRESENT                       0x2010
+#define MTP_RESPONSE_SELF_TEST_FAILED                           0x2011
+#define MTP_RESPONSE_PARTIAL_DELETION                           0x2012
+#define MTP_RESPONSE_STORE_NOT_AVAILABLE                        0x2013
+#define MTP_RESPONSE_SPECIFICATION_BY_FORMAT_UNSUPPORTED        0x2014
+#define MTP_RESPONSE_NO_VALID_OBJECT_INFO                       0x2015
+#define MTP_RESPONSE_INVALID_CODE_FORMAT                        0x2016
+#define MTP_RESPONSE_UNKNOWN_VENDOR_CODE                        0x2017
+#define MTP_RESPONSE_CAPTURE_ALREADY_TERMINATED                 0x2018
+#define MTP_RESPONSE_DEVICE_BUSY                                0x2019
+#define MTP_RESPONSE_INVALID_PARENT_OBJECT                      0x201A
+#define MTP_RESPONSE_INVALID_DEVICE_PROP_FORMAT                 0x201B
+#define MTP_RESPONSE_INVALID_DEVICE_PROP_VALUE                  0x201C
+#define MTP_RESPONSE_INVALID_PARAMETER                          0x201D
+#define MTP_RESPONSE_SESSION_ALREADY_OPEN                       0x201E
+#define MTP_RESPONSE_TRANSACTION_CANCELLED                      0x201F
+#define MTP_RESPONSE_SPECIFICATION_OF_DESTINATION_UNSUPPORTED   0x2020
+#define MTP_RESPONSE_INVALID_OBJECT_PROP_CODE                   0xA801
+#define MTP_RESPONSE_INVALID_OBJECT_PROP_FORMAT                 0xA802
+#define MTP_RESPONSE_INVALID_OBJECT_PROP_VALUE                  0xA803
+#define MTP_RESPONSE_INVALID_OBJECT_REFERENCE                   0xA804
+#define MTP_RESPONSE_GROUP_NOT_SUPPORTED                        0xA805
+#define MTP_RESPONSE_INVALID_DATASET                            0xA806
+#define MTP_RESPONSE_SPECIFICATION_BY_GROUP_UNSUPPORTED         0xA807
+#define MTP_RESPONSE_SPECIFICATION_BY_DEPTH_UNSUPPORTED         0xA808
+#define MTP_RESPONSE_OBJECT_TOO_LARGE                           0xA809
+#define MTP_RESPONSE_OBJECT_PROP_NOT_SUPPORTED                  0xA80A
+
+// MTP Event Codes
+#define MTP_EVENT_UNDEFINED                         0x4000
+#define MTP_EVENT_CANCEL_TRANSACTION                0x4001
+#define MTP_EVENT_OBJECT_ADDED                      0x4002
+#define MTP_EVENT_OBJECT_REMOVED                    0x4003
+#define MTP_EVENT_STORE_ADDED                       0x4004
+#define MTP_EVENT_STORE_REMOVED                     0x4005
+#define MTP_EVENT_DEVICE_PROP_CHANGED               0x4006
+#define MTP_EVENT_OBJECT_INFO_CHANGED               0x4007
+#define MTP_EVENT_DEVICE_INFO_CHANGED               0x4008
+#define MTP_EVENT_REQUEST_OBJECT_TRANSFER           0x4009
+#define MTP_EVENT_STORE_FULL                        0x400A
+#define MTP_EVENT_DEVICE_RESET                      0x400B
+#define MTP_EVENT_STORAGE_INFO_CHANGED              0x400C
+#define MTP_EVENT_CAPTURE_COMPLETE                  0x400D
+#define MTP_EVENT_UNREPORTED_STATUS                 0x400E
+#define MTP_EVENT_OBJECT_PROP_CHANGED               0xC801
+#define MTP_EVENT_OBJECT_PROP_DESC_CHANGED          0xC802
+#define MTP_EVENT_OBJECT_REFERENCES_CHANGED         0xC803
+
+// Storage Type
+#define MTP_STORAGE_FIXED_ROM                       0x0001
+#define MTP_STORAGE_REMOVABLE_ROM                   0x0002
+#define MTP_STORAGE_FIXED_RAM                       0x0003
+#define MTP_STORAGE_REMOVABLE_RAM                   0x0004
+
+// Storage File System
+#define MTP_STORAGE_FILESYSTEM_FLAT                 0x0001
+#define MTP_STORAGE_FILESYSTEM_HIERARCHICAL         0x0002
+#define MTP_STORAGE_FILESYSTEM_DCF                  0x0003
+
+// Storage Access Capability
+#define MTP_STORAGE_READ_WRITE                      0x0000
+#define MTP_STORAGE_READ_ONLY_WITHOUT_DELETE        0x0000
+#define MTP_STORAGE_READ_ONLY_WITH_DELETE           0x0000
+
+// Association Type
+#define MTP_ASSOCIATION_TYPE_UNDEFINED              0x0000
+#define MTP_ASSOCIATION_TYPE_GENERIC_FOLDER         0x0001
+
+#endif // _MTP_H
diff --git a/services/audioflinger/AudioPolicyManagerBase.cpp b/services/audioflinger/AudioPolicyManagerBase.cpp
index 381a958..549d661 100644
--- a/services/audioflinger/AudioPolicyManagerBase.cpp
+++ b/services/audioflinger/AudioPolicyManagerBase.cpp
@@ -902,7 +902,8 @@
 #ifdef AUDIO_POLICY_TEST
     Thread(false),
 #endif //AUDIO_POLICY_TEST
-    mPhoneState(AudioSystem::MODE_NORMAL), mRingerMode(0), mMusicStopTime(0), mLimitRingtoneVolume(false)
+    mPhoneState(AudioSystem::MODE_NORMAL), mRingerMode(0), mMusicStopTime(0), mLimitRingtoneVolume(false),
+    mLastVoiceVolume(-1.0f)
 {
     mpClientInterface = clientInterface;
 
@@ -1713,29 +1714,38 @@
     }
 
     float volume = computeVolume(stream, index, output, device);
-    // do not set volume if the float value did not change
-    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] || force) {
+    // We actually change the volume if:
+    // - the float value returned by computeVolume() changed
+    // - the force flag is set
+    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
+            force) {
         mOutputs.valueFor(output)->mCurVolume[stream] = volume;
         LOGV("setStreamVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
         if (stream == AudioSystem::VOICE_CALL ||
             stream == AudioSystem::DTMF ||
             stream == AudioSystem::BLUETOOTH_SCO) {
-            float voiceVolume = -1.0;
             // offset value to reflect actual hardware volume that never reaches 0
             // 1% corresponds roughly to first step in VOICE_CALL stream volume setting (see AudioService.java)
             volume = 0.01 + 0.99 * volume;
-            if (stream == AudioSystem::VOICE_CALL) {
-                voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
-            } else if (stream == AudioSystem::BLUETOOTH_SCO) {
-                voiceVolume = 1.0;
-            }
-            if (voiceVolume >= 0 && output == mHardwareOutput) {
-                mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
-            }
         }
         mpClientInterface->setStreamVolume((AudioSystem::stream_type)stream, volume, output, delayMs);
     }
 
+    if (stream == AudioSystem::VOICE_CALL ||
+        stream == AudioSystem::BLUETOOTH_SCO) {
+        float voiceVolume;
+        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
+        if (stream == AudioSystem::VOICE_CALL) {
+            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
+        } else {
+            voiceVolume = 1.0;
+        }
+        if (voiceVolume != mLastVoiceVolume && output == mHardwareOutput) {
+            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
+            mLastVoiceVolume = voiceVolume;
+        }
+    }
+
     return NO_ERROR;
 }