diff --git a/media/libaudioclient/AidlConversion.cpp b/media/libaudioclient/AidlConversion.cpp
index 56597e3..14fce0a 100644
--- a/media/libaudioclient/AidlConversion.cpp
+++ b/media/libaudioclient/AidlConversion.cpp
@@ -1515,7 +1515,7 @@
 }
 
 ConversionResult<audio_encapsulation_mode_t>
-aidl2legacy_audio_encapsulation_mode_t_AudioEncapsulationMode(media::AudioEncapsulationMode aidl) {
+aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t(media::AudioEncapsulationMode aidl) {
     switch (aidl) {
         case media::AudioEncapsulationMode::NONE:
             return AUDIO_ENCAPSULATION_MODE_NONE;
@@ -1528,7 +1528,7 @@
 }
 
 ConversionResult<media::AudioEncapsulationMode>
-legacy2aidl_AudioEncapsulationMode_audio_encapsulation_mode_t(audio_encapsulation_mode_t legacy) {
+legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode(audio_encapsulation_mode_t legacy) {
     switch (legacy) {
         case AUDIO_ENCAPSULATION_MODE_NONE:
             return media::AudioEncapsulationMode::NONE;
@@ -1560,7 +1560,7 @@
     legacy.offload_buffer_size = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.offloadBufferSize));
     legacy.usage = VALUE_OR_RETURN(aidl2legacy_AudioUsage_audio_usage_t(aidl.usage));
     legacy.encapsulation_mode = VALUE_OR_RETURN(
-            aidl2legacy_audio_encapsulation_mode_t_AudioEncapsulationMode(aidl.encapsulationMode));
+            aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t(aidl.encapsulationMode));
     legacy.content_id = VALUE_OR_RETURN(convertReinterpret<int32_t>(aidl.contentId));
     legacy.sync_id = VALUE_OR_RETURN(convertReinterpret<int32_t>(aidl.syncId));
     return legacy;
@@ -1595,7 +1595,7 @@
             return unexpected(BAD_VALUE);
         }
         aidl.encapsulationMode = VALUE_OR_RETURN(
-                legacy2aidl_AudioEncapsulationMode_audio_encapsulation_mode_t(
+                legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode(
                         legacy.encapsulation_mode));
         aidl.contentId = VALUE_OR_RETURN(convertReinterpret<int32_t>(legacy.content_id));
         aidl.syncId = VALUE_OR_RETURN(convertReinterpret<int32_t>(legacy.sync_id));
@@ -1758,4 +1758,76 @@
     return aidl;
 }
 
+ConversionResult<audio_encapsulation_metadata_type_t>
+aidl2legacy_AudioEncapsulationMetadataType_audio_encapsulation_metadata_type_t(
+        media::AudioEncapsulationMetadataType aidl) {
+    switch (aidl) {
+        case media::AudioEncapsulationMetadataType::NONE:
+            return AUDIO_ENCAPSULATION_METADATA_TYPE_NONE;
+        case media::AudioEncapsulationMetadataType::FRAMEWORK_TUNER:
+            return AUDIO_ENCAPSULATION_METADATA_TYPE_FRAMEWORK_TUNER;
+        case media::AudioEncapsulationMetadataType::DVB_AD_DESCRIPTOR:
+            return AUDIO_ENCAPSULATION_METADATA_TYPE_DVB_AD_DESCRIPTOR;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<media::AudioEncapsulationMetadataType>
+legacy2aidl_audio_encapsulation_metadata_type_t_AudioEncapsulationMetadataType(
+        audio_encapsulation_metadata_type_t legacy) {
+    switch (legacy) {
+        case AUDIO_ENCAPSULATION_METADATA_TYPE_NONE:
+            return media::AudioEncapsulationMetadataType::NONE;
+        case AUDIO_ENCAPSULATION_METADATA_TYPE_FRAMEWORK_TUNER:
+            return media::AudioEncapsulationMetadataType::FRAMEWORK_TUNER;
+        case AUDIO_ENCAPSULATION_METADATA_TYPE_DVB_AD_DESCRIPTOR:
+            return media::AudioEncapsulationMetadataType::DVB_AD_DESCRIPTOR;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<uint32_t>
+aidl2legacy_AudioEncapsulationMode_mask(int32_t aidl) {
+    return convertBitmask<uint32_t,
+                          int32_t,
+                          audio_encapsulation_mode_t,
+                          media::AudioEncapsulationMode>(
+            aidl, aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t,
+            index2enum_index<media::AudioEncapsulationMode>,
+            enumToMask_index<uint32_t, audio_encapsulation_mode_t>);
+}
+
+ConversionResult<int32_t>
+legacy2aidl_AudioEncapsulationMode_mask(uint32_t legacy) {
+    return convertBitmask<int32_t,
+                          uint32_t,
+                          media::AudioEncapsulationMode,
+                          audio_encapsulation_mode_t>(
+            legacy, legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode,
+            index2enum_index<audio_encapsulation_mode_t>,
+            enumToMask_index<int32_t, media::AudioEncapsulationMode>);
+}
+
+ConversionResult<uint32_t>
+aidl2legacy_AudioEncapsulationMetadataType_mask(int32_t aidl) {
+    return convertBitmask<uint32_t,
+                          int32_t,
+                          audio_encapsulation_metadata_type_t,
+                          media::AudioEncapsulationMetadataType>(
+            aidl, aidl2legacy_AudioEncapsulationMetadataType_audio_encapsulation_metadata_type_t,
+            index2enum_index<media::AudioEncapsulationMetadataType>,
+            enumToMask_index<uint32_t, audio_encapsulation_metadata_type_t>);
+}
+
+ConversionResult<int32_t>
+legacy2aidl_AudioEncapsulationMetadataType_mask(uint32_t legacy) {
+    return convertBitmask<int32_t,
+                          uint32_t,
+                          media::AudioEncapsulationMetadataType,
+                          audio_encapsulation_metadata_type_t>(
+            legacy, legacy2aidl_audio_encapsulation_metadata_type_t_AudioEncapsulationMetadataType,
+            index2enum_index<audio_encapsulation_metadata_type_t>,
+            enumToMask_index<int32_t, media::AudioEncapsulationMetadataType>);
+}
+
 }  // namespace android
diff --git a/media/libaudioclient/Android.bp b/media/libaudioclient/Android.bp
index dacec15..cb53cda 100644
--- a/media/libaudioclient/Android.bp
+++ b/media/libaudioclient/Android.bp
@@ -243,7 +243,9 @@
         "aidl/android/media/AudioContentType.aidl",
         "aidl/android/media/AudioDevice.aidl",
         "aidl/android/media/AudioEncapsulationMode.aidl",
+        "aidl/android/media/AudioEncapsulationMetadataType.aidl",
         "aidl/android/media/AudioFlag.aidl",
+        "aidl/android/media/AudioGain.aidl",
         "aidl/android/media/AudioGainConfig.aidl",
         "aidl/android/media/AudioGainMode.aidl",
         "aidl/android/media/AudioInputFlags.aidl",
@@ -254,6 +256,7 @@
         "aidl/android/media/AudioOffloadInfo.aidl",
         "aidl/android/media/AudioOutputFlags.aidl",
         "aidl/android/media/AudioPatch.aidl",
+        "aidl/android/media/AudioPort.aidl",
         "aidl/android/media/AudioPortConfig.aidl",
         "aidl/android/media/AudioPortConfigType.aidl",
         "aidl/android/media/AudioPortConfigDeviceExt.aidl",
@@ -263,12 +266,14 @@
         "aidl/android/media/AudioPortConfigSessionExt.aidl",
         "aidl/android/media/AudioPortRole.aidl",
         "aidl/android/media/AudioPortType.aidl",
+        "aidl/android/media/AudioProfile.aidl",
         "aidl/android/media/AudioSourceType.aidl",
         "aidl/android/media/AudioStreamType.aidl",
         "aidl/android/media/AudioTimestampInternal.aidl",
         "aidl/android/media/AudioUniqueIdUse.aidl",
         "aidl/android/media/AudioUsage.aidl",
         "aidl/android/media/AudioUuid.aidl",
+        "aidl/android/media/DeviceDescriptorBase.aidl",
         "aidl/android/media/EffectDescriptor.aidl",
     ],
     imports: [
@@ -300,6 +305,8 @@
         "aidl/android/media/CreateTrackResponse.aidl",
         "aidl/android/media/OpenInputRequest.aidl",
         "aidl/android/media/OpenInputResponse.aidl",
+        "aidl/android/media/OpenOutputRequest.aidl",
+        "aidl/android/media/OpenOutputResponse.aidl",
 
         "aidl/android/media/IAudioFlingerClient.aidl",
         "aidl/android/media/IAudioRecord.aidl",
diff --git a/media/libaudioclient/IAudioFlinger.cpp b/media/libaudioclient/IAudioFlinger.cpp
index c19a126..59853af 100644
--- a/media/libaudioclient/IAudioFlinger.cpp
+++ b/media/libaudioclient/IAudioFlinger.cpp
@@ -530,37 +530,16 @@
         return reply.readInt64();
     }
 
-    virtual status_t openOutput(audio_module_handle_t module,
-                                audio_io_handle_t *output,
-                                audio_config_t *config,
-                                const sp<DeviceDescriptorBase>& device,
-                                uint32_t *latencyMs,
-                                audio_output_flags_t flags)
+    virtual status_t openOutput(const media::OpenOutputRequest& request,
+                                media::OpenOutputResponse* response)
     {
-        if (output == nullptr || config == nullptr || device == nullptr || latencyMs == nullptr) {
-            return BAD_VALUE;
-        }
+        status_t status;
         Parcel data, reply;
-        data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
-        data.writeInt32(module);
-        data.write(config, sizeof(audio_config_t));
-        data.writeParcelable(*device);
-        data.writeInt32((int32_t) flags);
-        status_t status = remote()->transact(OPEN_OUTPUT, data, &reply);
-        if (status != NO_ERROR) {
-            *output = AUDIO_IO_HANDLE_NONE;
-            return status;
-        }
-        status = (status_t)reply.readInt32();
-        if (status != NO_ERROR) {
-            *output = AUDIO_IO_HANDLE_NONE;
-            return status;
-        }
-        *output = (audio_io_handle_t)reply.readInt32();
-        ALOGV("openOutput() returned output, %d", *output);
-        reply.read(config, sizeof(audio_config_t));
-        *latencyMs = reply.readInt32();
-        return NO_ERROR;
+        return data.writeParcelable(request)
+                ?: remote()->transact(OPEN_OUTPUT, data, &reply)
+                ?: data.readInt32(&status)
+                ?: status
+                ?: data.readParcelable(response);
     }
 
     virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1,
@@ -1295,29 +1274,13 @@
         } break;
         case OPEN_OUTPUT: {
             CHECK_INTERFACE(IAudioFlinger, data, reply);
-            audio_module_handle_t module = (audio_module_handle_t)data.readInt32();
-            audio_config_t config = {};
-            if (data.read(&config, sizeof(audio_config_t)) != NO_ERROR) {
-                ALOGE("b/23905951");
-            }
-            sp<DeviceDescriptorBase> device = new DeviceDescriptorBase(AUDIO_DEVICE_NONE);
-            status_t status = NO_ERROR;
-            if ((status = data.readParcelable(device.get())) != NO_ERROR) {
-                reply->writeInt32((int32_t)status);
-                return NO_ERROR;
-            }
-            audio_output_flags_t flags = (audio_output_flags_t) data.readInt32();
-            uint32_t latencyMs = 0;
-            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
-            status = openOutput(module, &output, &config, device, &latencyMs, flags);
-            ALOGV("OPEN_OUTPUT output, %d", output);
-            reply->writeInt32((int32_t)status);
-            if (status == NO_ERROR) {
-                reply->writeInt32((int32_t)output);
-                reply->write(&config, sizeof(audio_config_t));
-                reply->writeInt32(latencyMs);
-            }
-            return NO_ERROR;
+            status_t status;
+            media::OpenOutputRequest request;
+            media::OpenOutputResponse response;
+            return data.readParcelable(&request)
+                ?: (status = openOutput(request, &response), OK)
+                ?: reply->writeInt32(status)
+                ?: reply->writeParcelable(response);
         } break;
         case OPEN_DUPLICATE_OUTPUT: {
             CHECK_INTERFACE(IAudioFlinger, data, reply);
diff --git a/media/libaudioclient/aidl/android/media/AudioEncapsulationMetadataType.aidl b/media/libaudioclient/aidl/android/media/AudioEncapsulationMetadataType.aidl
new file mode 100644
index 0000000..b03adfe
--- /dev/null
+++ b/media/libaudioclient/aidl/android/media/AudioEncapsulationMetadataType.aidl
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.media;
+
+/**
+ * {@hide}
+ */
+@Backing(type="int")
+enum AudioEncapsulationMetadataType {
+    NONE = 0,
+    FRAMEWORK_TUNER = 1,
+    DVB_AD_DESCRIPTOR = 2,
+}
diff --git a/media/libaudioclient/aidl/android/media/AudioGain.aidl b/media/libaudioclient/aidl/android/media/AudioGain.aidl
new file mode 100644
index 0000000..048b295
--- /dev/null
+++ b/media/libaudioclient/aidl/android/media/AudioGain.aidl
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media;
+
+/**
+ * {@hide}
+ */
+parcelable AudioGain {
+    int index;
+    boolean useInChannelMask;
+    boolean useForVolume;
+    /** Bitmask, indexed by AudioGainMode. */
+    int mode;
+    /** Interpreted as audio_channel_mask_t. */
+    int channelMask;
+    int minValue;
+    int maxValue;
+    int defaultValue;
+    int stepValue;
+    int minRampMs;
+    int maxRampMs;
+}
diff --git a/media/libaudioclient/aidl/android/media/AudioPort.aidl b/media/libaudioclient/aidl/android/media/AudioPort.aidl
new file mode 100644
index 0000000..1aa532b
--- /dev/null
+++ b/media/libaudioclient/aidl/android/media/AudioPort.aidl
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media;
+
+import android.media.AudioGain;
+import android.media.AudioPortRole;
+import android.media.AudioPortType;
+import android.media.AudioProfile;
+
+/**
+ * {@hide}
+ */
+parcelable AudioPort {
+    /** Gain controllers. */
+    AudioGain[] gains;
+    @utf8InCpp String name;
+    AudioPortType type;
+    AudioPortRole role;
+    /** AudioProfiles supported by this port (format, Rates, Channels). */
+    AudioProfile[] profiles;
+}
diff --git a/media/libaudioclient/aidl/android/media/AudioProfile.aidl b/media/libaudioclient/aidl/android/media/AudioProfile.aidl
new file mode 100644
index 0000000..e5e8812
--- /dev/null
+++ b/media/libaudioclient/aidl/android/media/AudioProfile.aidl
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media;
+
+import android.media.audio.common.AudioFormat;
+
+/**
+ * {@hide}
+ */
+parcelable AudioProfile {
+    @utf8InCpp String name;
+    /** The format for an audio profile should only be set when initialized. */
+    AudioFormat format;
+    /** Interpreted as audio_channel_mask_t. */
+    int[] channelMasks;
+    int[] samplingRates;
+    boolean isDynamicFormat;
+    boolean isDynamicChannels;
+    boolean isDynamicRate;
+}
diff --git a/media/libaudioclient/aidl/android/media/DeviceDescriptorBase.aidl b/media/libaudioclient/aidl/android/media/DeviceDescriptorBase.aidl
new file mode 100644
index 0000000..aa0f149
--- /dev/null
+++ b/media/libaudioclient/aidl/android/media/DeviceDescriptorBase.aidl
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media;
+
+import android.media.AudioPort;
+import android.media.AudioPortConfig;
+import android.media.AudioDevice;
+
+/**
+ * {@hide}
+ */
+parcelable DeviceDescriptorBase {
+    AudioPort port;
+    AudioPortConfig portConfig;
+    AudioDevice device;
+    /** Bitmask, indexed by AudioEncapsulationMode. */
+    int encapsulationModes;
+    /** Bitmask, indexed by AudioEncapsulationMetadataType. */
+    int encapsulationMetadataTypes;
+}
diff --git a/media/libaudioclient/aidl/android/media/OpenOutputRequest.aidl b/media/libaudioclient/aidl/android/media/OpenOutputRequest.aidl
new file mode 100644
index 0000000..4518adb
--- /dev/null
+++ b/media/libaudioclient/aidl/android/media/OpenOutputRequest.aidl
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media;
+
+import android.media.AudioConfig;
+import android.media.DeviceDescriptorBase;
+
+/**
+ * {@hide}
+ */
+parcelable OpenOutputRequest {
+    /** Interpreted as audio_module_handle_t. */
+    int module;
+    AudioConfig config;
+    DeviceDescriptorBase device;
+    /** Bitmask, indexed by AudioOutputFlag. */
+    int flags;
+}
diff --git a/media/libaudioclient/aidl/android/media/OpenOutputResponse.aidl b/media/libaudioclient/aidl/android/media/OpenOutputResponse.aidl
new file mode 100644
index 0000000..a051969
--- /dev/null
+++ b/media/libaudioclient/aidl/android/media/OpenOutputResponse.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media;
+
+import android.media.AudioConfig;
+
+/**
+ * {@hide}
+ */
+parcelable OpenOutputResponse {
+    /** Interpreted as audio_io_handle_t. */
+    int output;
+    AudioConfig config;
+    int latencyMs;
+    /** Bitmask, indexed by AudioOutputFlag. */
+    int flags;
+}
diff --git a/media/libaudioclient/include/media/AidlConversion.h b/media/libaudioclient/include/media/AidlConversion.h
index 0751736..95b8159 100644
--- a/media/libaudioclient/include/media/AidlConversion.h
+++ b/media/libaudioclient/include/media/AidlConversion.h
@@ -27,6 +27,8 @@
 #include <android/media/AudioClient.h>
 #include <android/media/AudioConfig.h>
 #include <android/media/AudioConfigBase.h>
+#include <android/media/AudioEncapsulationMode.h>
+#include <android/media/AudioEncapsulationMetadataType.h>
 #include <android/media/AudioFlag.h>
 #include <android/media/AudioGainMode.h>
 #include <android/media/AudioInputFlags.h>
@@ -103,6 +105,20 @@
     return static_cast<To>(from);
 }
 
+/**
+ * A generic template that helps convert containers of convertible types.
+ */
+template<typename OutputContainer, typename InputContainer, typename Func>
+ConversionResult<OutputContainer>
+convertContainer(const InputContainer& input, const Func& itemConversion) {
+    OutputContainer output;
+    auto ins = std::inserter(output, output.begin());
+    for (const auto& item : input) {
+        *ins = VALUE_OR_RETURN(itemConversion(item));
+    }
+    return output;
+}
+
 // maxSize is the size of the C-string buffer (including the 0-terminator), NOT the max length of
 // the string.
 status_t aidl2legacy_string(std::string_view aidl, char* dest, size_t maxSize);
@@ -274,9 +290,9 @@
 legacy2aidl_audio_attributes_t_AudioAttributesInternal(const audio_attributes_t& legacy);
 
 ConversionResult<audio_encapsulation_mode_t>
-aidl2legacy_audio_encapsulation_mode_t_AudioEncapsulationMode(media::AudioEncapsulationMode aidl);
+aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t(media::AudioEncapsulationMode aidl);
 ConversionResult<media::AudioEncapsulationMode>
-legacy2aidl_AudioEncapsulationMode_audio_encapsulation_mode_t(audio_encapsulation_mode_t legacy);
+legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode(audio_encapsulation_mode_t legacy);
 
 ConversionResult<audio_offload_info_t>
 aidl2legacy_AudioOffloadInfo_audio_offload_info_t(const media::AudioOffloadInfo& aidl);
@@ -318,4 +334,21 @@
 ConversionResult<media::EffectDescriptor>
 legacy2aidl_effect_descriptor_t_EffectDescriptor(const effect_descriptor_t& legacy);
 
+ConversionResult<audio_encapsulation_metadata_type_t>
+aidl2legacy_AudioEncapsulationMetadataType_audio_encapsulation_metadata_type_t(
+        media::AudioEncapsulationMetadataType aidl);
+ConversionResult<media::AudioEncapsulationMetadataType>
+legacy2aidl_audio_encapsulation_metadata_type_t_AudioEncapsulationMetadataType(
+        audio_encapsulation_metadata_type_t legacy);
+
+ConversionResult<uint32_t>
+aidl2legacy_AudioEncapsulationMode_mask(int32_t aidl);
+ConversionResult<int32_t>
+legacy2aidl_AudioEncapsulationMode_mask(uint32_t legacy);
+
+ConversionResult<uint32_t>
+aidl2legacy_AudioEncapsulationMetadataType_mask(int32_t aidl);
+ConversionResult<int32_t>
+legacy2aidl_AudioEncapsulationMetadataType_mask(uint32_t legacy);
+
 }  // namespace android
diff --git a/media/libaudioclient/include/media/IAudioFlinger.h b/media/libaudioclient/include/media/IAudioFlinger.h
index 06b1987..11d341e 100644
--- a/media/libaudioclient/include/media/IAudioFlinger.h
+++ b/media/libaudioclient/include/media/IAudioFlinger.h
@@ -51,6 +51,8 @@
 #include "android/media/IEffectClient.h"
 #include "android/media/OpenInputRequest.h"
 #include "android/media/OpenInputResponse.h"
+#include "android/media/OpenOutputRequest.h"
+#include "android/media/OpenOutputResponse.h"
 
 namespace android {
 
@@ -238,12 +240,8 @@
     virtual size_t getInputBufferSize(uint32_t sampleRate, audio_format_t format,
             audio_channel_mask_t channelMask) const = 0;
 
-    virtual status_t openOutput(audio_module_handle_t module,
-                                audio_io_handle_t *output,
-                                audio_config_t *config,
-                                const sp<DeviceDescriptorBase>& device,
-                                uint32_t *latencyMs,
-                                audio_output_flags_t flags) = 0;
+    virtual status_t openOutput(const media::OpenOutputRequest& request,
+                                media::OpenOutputResponse* response) = 0;
     virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1,
                                     audio_io_handle_t output2) = 0;
     virtual status_t closeOutput(audio_io_handle_t output) = 0;
diff --git a/media/libaudiofoundation/AudioGain.cpp b/media/libaudiofoundation/AudioGain.cpp
index 759140e..c59e966 100644
--- a/media/libaudiofoundation/AudioGain.cpp
+++ b/media/libaudiofoundation/AudioGain.cpp
@@ -129,42 +129,49 @@
            mGain.max_ramp_ms == other->mGain.max_ramp_ms;
 }
 
-status_t AudioGain::writeToParcel(android::Parcel *parcel) const
-{
-    status_t status = NO_ERROR;
-    if ((status = parcel->writeInt32(mIndex)) != NO_ERROR) return status;
-    if ((status = parcel->writeBool(mUseInChannelMask)) != NO_ERROR) return status;
-    if ((status = parcel->writeBool(mUseForVolume)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mGain.mode)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mGain.channel_mask)) != NO_ERROR) return status;
-    if ((status = parcel->writeInt32(mGain.min_value)) != NO_ERROR) return status;
-    if ((status = parcel->writeInt32(mGain.max_value)) != NO_ERROR) return status;
-    if ((status = parcel->writeInt32(mGain.default_value)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mGain.step_value)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mGain.min_ramp_ms)) != NO_ERROR) return status;
-    status = parcel->writeUint32(mGain.max_ramp_ms);
-    return status;
+status_t AudioGain::writeToParcel(android::Parcel *parcel) const {
+    media::AudioGain parcelable;
+    return writeToParcelable(&parcelable)
+        ?: parcelable.writeToParcel(parcel);
 }
 
-status_t AudioGain::readFromParcel(const android::Parcel *parcel)
-{
-    status_t status = NO_ERROR;
-    if ((status = parcel->readInt32(&mIndex)) != NO_ERROR) return status;
-    if ((status = parcel->readBool(&mUseInChannelMask)) != NO_ERROR) return status;
-    if ((status = parcel->readBool(&mUseForVolume)) != NO_ERROR) return status;
-    uint32_t rawGainMode;
-    if ((status = parcel->readUint32(&rawGainMode)) != NO_ERROR) return status;
-    mGain.mode = static_cast<audio_gain_mode_t>(rawGainMode);
-    uint32_t rawChannelMask;
-    if ((status = parcel->readUint32(&rawChannelMask)) != NO_ERROR) return status;
-    mGain.channel_mask = static_cast<audio_channel_mask_t>(rawChannelMask);
-    if ((status = parcel->readInt32(&mGain.min_value)) != NO_ERROR) return status;
-    if ((status = parcel->readInt32(&mGain.max_value)) != NO_ERROR) return status;
-    if ((status = parcel->readInt32(&mGain.default_value)) != NO_ERROR) return status;
-    if ((status = parcel->readUint32(&mGain.step_value)) != NO_ERROR) return status;
-    if ((status = parcel->readUint32(&mGain.min_ramp_ms)) != NO_ERROR) return status;
-    status = parcel->readUint32(&mGain.max_ramp_ms);
-    return status;
+status_t AudioGain::writeToParcelable(media::AudioGain* parcelable) const {
+    parcelable->index = VALUE_OR_RETURN_STATUS(convertIntegral<int32_t>(mIndex));
+    parcelable->useInChannelMask = mUseInChannelMask;
+    parcelable->useForVolume = mUseForVolume;
+    parcelable->mode = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_gain_mode_t_int32_t(mGain.mode));
+    parcelable->channelMask = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_audio_channel_mask_t_int32_t(mGain.channel_mask));
+    parcelable->minValue = VALUE_OR_RETURN_STATUS(convertIntegral<int32_t>(mGain.min_value));
+    parcelable->maxValue = VALUE_OR_RETURN_STATUS(convertIntegral<int32_t>(mGain.max_value));
+    parcelable->defaultValue = VALUE_OR_RETURN_STATUS(
+            convertIntegral<int32_t>(mGain.default_value));
+    parcelable->stepValue = VALUE_OR_RETURN_STATUS(convertIntegral<int32_t>(mGain.step_value));
+    parcelable->minRampMs = VALUE_OR_RETURN_STATUS(convertIntegral<int32_t>(mGain.min_ramp_ms));
+    parcelable->maxRampMs = VALUE_OR_RETURN_STATUS(convertIntegral<int32_t>(mGain.max_ramp_ms));
+    return OK;
+}
+
+status_t AudioGain::readFromParcel(const android::Parcel *parcel) {
+    media::AudioGain parcelable;
+    return parcelable.readFromParcel(parcel)
+        ?: readFromParcelable(parcelable);
+}
+
+status_t AudioGain::readFromParcelable(const media::AudioGain& parcelable) {
+    mIndex = VALUE_OR_RETURN_STATUS(convertIntegral<int>(parcelable.index));
+    mUseInChannelMask = parcelable.useInChannelMask;
+    mUseForVolume = parcelable.useForVolume;
+    mGain.mode = VALUE_OR_RETURN_STATUS(aidl2legacy_int32_t_audio_gain_mode_t(parcelable.mode));
+    mGain.channel_mask = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_int32_t_audio_channel_mask_t(parcelable.channelMask));
+    mGain.min_value = VALUE_OR_RETURN_STATUS(convertIntegral<int>(parcelable.minValue));
+    mGain.max_value = VALUE_OR_RETURN_STATUS(convertIntegral<int>(parcelable.maxValue));
+    mGain.default_value = VALUE_OR_RETURN_STATUS(convertIntegral<int>(parcelable.defaultValue));
+    mGain.step_value = VALUE_OR_RETURN_STATUS(convertIntegral<unsigned int>(parcelable.stepValue));
+    mGain.min_ramp_ms = VALUE_OR_RETURN_STATUS(convertIntegral<unsigned int>(parcelable.minRampMs));
+    mGain.max_ramp_ms = VALUE_OR_RETURN_STATUS(convertIntegral<unsigned int>(parcelable.maxRampMs));
+    return OK;
 }
 
 bool AudioGains::equals(const AudioGains &other) const
@@ -200,4 +207,34 @@
     return status;
 }
 
+ConversionResult<sp<AudioGain>>
+aidl2legacy_AudioGain(const media::AudioGain& aidl) {
+    sp<AudioGain> legacy = new AudioGain(0, false);
+    status_t status = legacy->readFromParcelable(aidl);
+    if (status != OK) {
+        return base::unexpected(status);
+    }
+    return legacy;
+}
+
+ConversionResult<media::AudioGain>
+legacy2aidl_AudioGain(const sp<AudioGain>& legacy) {
+    media::AudioGain aidl;
+    status_t status = legacy->writeToParcelable(&aidl);
+    if (status != OK) {
+        return base::unexpected(status);
+    }
+    return aidl;
+}
+
+ConversionResult<AudioGains>
+aidl2legacy_AudioGains(const std::vector<media::AudioGain>& aidl) {
+    return convertContainer<AudioGains>(aidl, aidl2legacy_AudioGain);
+}
+
+ConversionResult<std::vector<media::AudioGain>>
+legacy2aidl_AudioGains(const AudioGains& legacy) {
+    return convertContainer<std::vector<media::AudioGain>>(legacy, legacy2aidl_AudioGain);
+}
+
 } // namespace android
diff --git a/media/libaudiofoundation/AudioPort.cpp b/media/libaudiofoundation/AudioPort.cpp
index d650c67..559c711 100644
--- a/media/libaudiofoundation/AudioPort.cpp
+++ b/media/libaudiofoundation/AudioPort.cpp
@@ -150,32 +150,33 @@
 
 status_t AudioPort::writeToParcel(Parcel *parcel) const
 {
-    status_t status = NO_ERROR;
-    if ((status = parcel->writeUtf8AsUtf16(mName)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mType)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mRole)) != NO_ERROR) return status;
-    if ((status = parcel->writeParcelable(mProfiles)) != NO_ERROR) return status;
-    if ((status = parcel->writeParcelable(mGains)) != NO_ERROR) return status;
-    return status;
+    media::AudioPort parcelable;
+    return writeToParcelable(&parcelable)
+        ?: parcelable.writeToParcel(parcel);
 }
 
-status_t AudioPort::readFromParcel(const Parcel *parcel)
-{
-    status_t status = NO_ERROR;
-    if ((status = parcel->readUtf8FromUtf16(&mName)) != NO_ERROR) return status;
-    static_assert(sizeof(mType) == sizeof(uint32_t));
-    if ((status = parcel->readUint32(reinterpret_cast<uint32_t*>(&mType))) != NO_ERROR) {
-        return status;
-    }
-    static_assert(sizeof(mRole) == sizeof(uint32_t));
-    if ((status = parcel->readUint32(reinterpret_cast<uint32_t*>(&mRole))) != NO_ERROR) {
-        return status;
-    }
-    mProfiles.clear();
-    if ((status = parcel->readParcelable(&mProfiles)) != NO_ERROR) return status;
-    mGains.clear();
-    if ((status = parcel->readParcelable(&mGains)) != NO_ERROR) return status;
-    return status;
+status_t AudioPort::writeToParcelable(media::AudioPort* parcelable) const {
+    parcelable->name = mName;
+    parcelable->type = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_port_type_t_AudioPortType(mType));
+    parcelable->role = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_port_role_t_AudioPortRole(mRole));
+    parcelable->profiles = VALUE_OR_RETURN_STATUS(legacy2aidl_AudioProfileVector(mProfiles));
+    parcelable->gains = VALUE_OR_RETURN_STATUS(legacy2aidl_AudioGains(mGains));
+    return OK;
+}
+
+status_t AudioPort::readFromParcel(const Parcel *parcel) {
+    media::AudioPort parcelable;
+    return parcelable.readFromParcel(parcel)
+        ?: readFromParcelable(parcelable);
+}
+
+status_t AudioPort::readFromParcelable(const media::AudioPort& parcelable) {
+    mName = parcelable.name;
+    mType = VALUE_OR_RETURN_STATUS(aidl2legacy_AudioPortType_audio_port_type_t(parcelable.type));
+    mRole = VALUE_OR_RETURN_STATUS(aidl2legacy_AudioPortRole_audio_port_role_t(parcelable.role));
+    mProfiles = VALUE_OR_RETURN_STATUS(aidl2legacy_AudioProfileVector(parcelable.profiles));
+    mGains = VALUE_OR_RETURN_STATUS(aidl2legacy_AudioGains(parcelable.gains));
+    return OK;
 }
 
 // --- AudioPortConfig class implementation
@@ -276,50 +277,56 @@
            mGain.ramp_duration_ms == other->mGain.ramp_duration_ms;
 }
 
-status_t AudioPortConfig::writeToParcel(Parcel *parcel) const
-{
-    status_t status = NO_ERROR;
-    if ((status = parcel->writeUint32(mSamplingRate)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mFormat)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mChannelMask)) != NO_ERROR) return status;
-    if ((status = parcel->writeInt32(mId)) != NO_ERROR) return status;
-    // Write mGain to parcel.
-    if ((status = parcel->writeInt32(mGain.index)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mGain.mode)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mGain.channel_mask)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mGain.ramp_duration_ms)) != NO_ERROR) return status;
-    std::vector<int> values(std::begin(mGain.values), std::end(mGain.values));
-    if ((status = parcel->writeInt32Vector(values)) != NO_ERROR) return status;
-    return status;
+status_t AudioPortConfig::writeToParcel(Parcel *parcel) const {
+    media::AudioPortConfig parcelable;
+    return writeToParcelable(&parcelable)
+        ?: parcelable.writeToParcel(parcel);
 }
 
-status_t AudioPortConfig::readFromParcel(const Parcel *parcel)
-{
-    status_t status = NO_ERROR;
-    if ((status = parcel->readUint32(&mSamplingRate)) != NO_ERROR) return status;
-    static_assert(sizeof(mFormat) == sizeof(uint32_t));
-    if ((status = parcel->readUint32(reinterpret_cast<uint32_t*>(&mFormat))) != NO_ERROR) {
-        return status;
-    }
-    uint32_t rawChannelMask;
-    if ((status = parcel->readUint32(&rawChannelMask)) != NO_ERROR) return status;
-    mChannelMask = static_cast<audio_channel_mask_t>(rawChannelMask);
-    if ((status = parcel->readInt32(&mId)) != NO_ERROR) return status;
-    // Read mGain from parcel.
-    if ((status = parcel->readInt32(&mGain.index)) != NO_ERROR) return status;
-    uint32_t rawGainMode;
-    if ((status = parcel->readUint32(&rawGainMode)) != NO_ERROR) return status;
-    mGain.mode = static_cast<audio_gain_mode_t>(rawGainMode);
-    if ((status = parcel->readUint32(&rawChannelMask)) != NO_ERROR) return status;
-    mGain.channel_mask = static_cast<audio_channel_mask_t>(rawChannelMask);
-    if ((status = parcel->readUint32(&mGain.ramp_duration_ms)) != NO_ERROR) return status;
-    std::vector<int> values;
-    if ((status = parcel->readInt32Vector(&values)) != NO_ERROR) return status;
-    if (values.size() != std::size(mGain.values)) {
+status_t AudioPortConfig::writeToParcelable(media::AudioPortConfig* parcelable) const {
+    parcelable->sampleRate = VALUE_OR_RETURN_STATUS(convertIntegral<int32_t>(mSamplingRate));
+    parcelable->format = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_format_t_AudioFormat(mFormat));
+    parcelable->channelMask = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_audio_channel_mask_t_int32_t(mChannelMask));
+    parcelable->id = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_port_handle_t_int32_t(mId));
+    parcelable->gain.index = VALUE_OR_RETURN_STATUS(convertIntegral<int32_t>(mGain.index));
+    parcelable->gain.mode = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_audio_gain_mode_t_int32_t(mGain.mode));
+    parcelable->gain.channelMask = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_audio_channel_mask_t_int32_t(mGain.channel_mask));
+    parcelable->gain.rampDurationMs = VALUE_OR_RETURN_STATUS(
+            convertIntegral<int32_t>(mGain.ramp_duration_ms));
+    parcelable->gain.values = VALUE_OR_RETURN_STATUS(convertContainer<std::vector<int32_t>>(
+            mGain.values, convertIntegral<int32_t, int>));
+    return OK;
+}
+
+status_t AudioPortConfig::readFromParcel(const Parcel *parcel) {
+    media::AudioPortConfig parcelable;
+    return parcelable.readFromParcel(parcel)
+        ?: readFromParcelable(parcelable);
+}
+
+status_t AudioPortConfig::readFromParcelable(const media::AudioPortConfig& parcelable) {
+    mSamplingRate = VALUE_OR_RETURN_STATUS(convertIntegral<unsigned int>(parcelable.sampleRate));
+    mFormat = VALUE_OR_RETURN_STATUS(aidl2legacy_AudioFormat_audio_format_t(parcelable.format));
+    mChannelMask = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_int32_t_audio_channel_mask_t(parcelable.channelMask));
+    mId = VALUE_OR_RETURN_STATUS(aidl2legacy_int32_t_audio_port_handle_t(parcelable.id));
+    mGain.index = VALUE_OR_RETURN_STATUS(convertIntegral<int>(parcelable.gain.index));
+    mGain.mode = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_int32_t_audio_gain_mode_t(parcelable.gain.mode));
+    mGain.channel_mask = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_int32_t_audio_channel_mask_t(parcelable.gain.channelMask));
+    mGain.ramp_duration_ms = VALUE_OR_RETURN_STATUS(
+            convertIntegral<unsigned int>(parcelable.gain.rampDurationMs));
+    if (parcelable.gain.values.size() > std::size(mGain.values)) {
         return BAD_VALUE;
     }
-    std::copy(values.begin(), values.end(), mGain.values);
-    return status;
+    for (size_t i = 0; i < parcelable.gain.values.size(); ++i) {
+        mGain.values[i] = VALUE_OR_RETURN_STATUS(convertIntegral<int>(parcelable.gain.values[i]));
+    }
+    return OK;
 }
 
 } // namespace android
diff --git a/media/libaudiofoundation/AudioProfile.cpp b/media/libaudiofoundation/AudioProfile.cpp
index ec52575..3b47fed 100644
--- a/media/libaudiofoundation/AudioProfile.cpp
+++ b/media/libaudiofoundation/AudioProfile.cpp
@@ -130,44 +130,73 @@
            mIsDynamicRate == other->isDynamicRate();
 }
 
-status_t AudioProfile::writeToParcel(Parcel *parcel) const
-{
-    status_t status = NO_ERROR;
-    if ((status = parcel->writeUtf8AsUtf16(mName)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mFormat)) != NO_ERROR) return status;
-    std::vector<int> values(mChannelMasks.begin(), mChannelMasks.end());
-    if ((status = parcel->writeInt32Vector(values)) != NO_ERROR) return status;
-    values.clear();
-    values.assign(mSamplingRates.begin(), mSamplingRates.end());
-    if ((status = parcel->writeInt32Vector(values)) != NO_ERROR) return status;
-    if ((status = parcel->writeBool(mIsDynamicFormat)) != NO_ERROR) return status;
-    if ((status = parcel->writeBool(mIsDynamicChannels)) != NO_ERROR) return status;
-    if ((status = parcel->writeBool(mIsDynamicRate)) != NO_ERROR) return status;
-    return status;
+AudioProfile& AudioProfile::operator=(const AudioProfile& other) {
+    mName = other.mName;
+    mFormat = other.mFormat;
+    mChannelMasks = other.mChannelMasks;
+    mSamplingRates = other.mSamplingRates;
+    mIsDynamicFormat = other.mIsDynamicFormat;
+    mIsDynamicChannels = other.mIsDynamicChannels;
+    mIsDynamicRate = other.mIsDynamicRate;
+    return *this;
 }
 
-status_t AudioProfile::readFromParcel(const Parcel *parcel)
-{
-    status_t status = NO_ERROR;
-    if ((status = parcel->readUtf8FromUtf16(&mName)) != NO_ERROR) return status;
-    static_assert(sizeof(mFormat) == sizeof(uint32_t));
-    if ((status = parcel->readUint32(reinterpret_cast<uint32_t*>(&mFormat))) != NO_ERROR) {
+status_t AudioProfile::writeToParcel(Parcel *parcel) const {
+    media::AudioProfile parcelable = VALUE_OR_RETURN_STATUS(toParcelable());
+    return parcelable.writeToParcel(parcel);
+ }
+
+ConversionResult<media::AudioProfile>
+AudioProfile::toParcelable() const {
+    media::AudioProfile parcelable;
+    parcelable.name = mName;
+    parcelable.format = VALUE_OR_RETURN(legacy2aidl_audio_format_t_AudioFormat(mFormat));
+    parcelable.channelMasks = VALUE_OR_RETURN(
+            convertContainer<std::vector<int32_t>>(mChannelMasks,
+                                                   legacy2aidl_audio_channel_mask_t_int32_t));
+    parcelable.samplingRates = VALUE_OR_RETURN(
+            convertContainer<std::vector<int32_t>>(mSamplingRates,
+                                                   convertIntegral<int32_t, uint32_t>));
+    parcelable.isDynamicFormat = mIsDynamicFormat;
+    parcelable.isDynamicChannels = mIsDynamicChannels;
+    parcelable.isDynamicRate = mIsDynamicRate;
+    return parcelable;
+}
+
+status_t AudioProfile::readFromParcel(const Parcel *parcel) {
+    media::AudioProfile parcelable;
+    if (status_t status = parcelable.readFromParcel(parcel); status != OK) {
         return status;
     }
-    std::vector<int> values;
-    if ((status = parcel->readInt32Vector(&values)) != NO_ERROR) return status;
-    mChannelMasks.clear();
-    for (auto raw : values) {
-        mChannelMasks.insert(static_cast<audio_channel_mask_t>(raw));
-    }
-    values.clear();
-    if ((status = parcel->readInt32Vector(&values)) != NO_ERROR) return status;
-    mSamplingRates.clear();
-    mSamplingRates.insert(values.begin(), values.end());
-    if ((status = parcel->readBool(&mIsDynamicFormat)) != NO_ERROR) return status;
-    if ((status = parcel->readBool(&mIsDynamicChannels)) != NO_ERROR) return status;
-    if ((status = parcel->readBool(&mIsDynamicRate)) != NO_ERROR) return status;
-    return status;
+    *this = *VALUE_OR_RETURN_STATUS(fromParcelable(parcelable));
+    return OK;
+}
+
+ConversionResult<sp<AudioProfile>>
+AudioProfile::fromParcelable(const media::AudioProfile& parcelable) {
+    sp<AudioProfile> legacy = new AudioProfile();
+    legacy->mName = parcelable.name;
+    legacy->mFormat = VALUE_OR_RETURN(aidl2legacy_AudioFormat_audio_format_t(parcelable.format));
+    legacy->mChannelMasks = VALUE_OR_RETURN(
+            convertContainer<ChannelMaskSet>(parcelable.channelMasks,
+                                             aidl2legacy_int32_t_audio_channel_mask_t));
+    legacy->mSamplingRates = VALUE_OR_RETURN(
+            convertContainer<SampleRateSet>(parcelable.samplingRates,
+                                            convertIntegral<uint32_t, int32_t>));
+    legacy->mIsDynamicFormat = parcelable.isDynamicFormat;
+    legacy->mIsDynamicChannels = parcelable.isDynamicChannels;
+    legacy->mIsDynamicRate = parcelable.isDynamicRate;
+    return legacy;
+}
+
+ConversionResult<sp<AudioProfile>>
+aidl2legacy_AudioProfile(const media::AudioProfile& aidl) {
+    return AudioProfile::fromParcelable(aidl);
+}
+
+ConversionResult<media::AudioProfile>
+legacy2aidl_AudioProfile(const sp<AudioProfile>& legacy) {
+    return legacy->toParcelable();
 }
 
 ssize_t AudioProfileVector::add(const sp<AudioProfile> &profile)
@@ -316,4 +345,14 @@
                       });
 }
 
+ConversionResult<AudioProfileVector>
+aidl2legacy_AudioProfileVector(const std::vector<media::AudioProfile>& aidl) {
+    return convertContainer<AudioProfileVector>(aidl, aidl2legacy_AudioProfile);
+}
+
+ConversionResult<std::vector<media::AudioProfile>>
+legacy2aidl_AudioProfileVector(const AudioProfileVector& legacy) {
+    return convertContainer<std::vector<media::AudioProfile>>(legacy, legacy2aidl_AudioProfile);
+}
+
 } // namespace android
diff --git a/media/libaudiofoundation/DeviceDescriptorBase.cpp b/media/libaudiofoundation/DeviceDescriptorBase.cpp
index 50bda8b..6261559 100644
--- a/media/libaudiofoundation/DeviceDescriptorBase.cpp
+++ b/media/libaudiofoundation/DeviceDescriptorBase.cpp
@@ -19,6 +19,7 @@
 
 #include <android-base/stringprintf.h>
 #include <audio_utils/string.h>
+#include <media/AidlConversion.h>
 #include <media/DeviceDescriptorBase.h>
 #include <media/TypeConverter.h>
 
@@ -155,26 +156,45 @@
            mDeviceTypeAddr.equals(other->mDeviceTypeAddr);
 }
 
+
 status_t DeviceDescriptorBase::writeToParcel(Parcel *parcel) const
 {
-    status_t status = NO_ERROR;
-    if ((status = AudioPort::writeToParcel(parcel)) != NO_ERROR) return status;
-    if ((status = AudioPortConfig::writeToParcel(parcel)) != NO_ERROR) return status;
-    if ((status = parcel->writeParcelable(mDeviceTypeAddr)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mEncapsulationModes)) != NO_ERROR) return status;
-    if ((status = parcel->writeUint32(mEncapsulationMetadataTypes)) != NO_ERROR) return status;
-    return status;
+    media::DeviceDescriptorBase parcelable;
+    return writeToParcelable(&parcelable)
+        ?: parcelable.writeToParcel(parcel);
 }
 
-status_t DeviceDescriptorBase::readFromParcel(const Parcel *parcel)
-{
-    status_t status = NO_ERROR;
-    if ((status = AudioPort::readFromParcel(parcel)) != NO_ERROR) return status;
-    if ((status = AudioPortConfig::readFromParcel(parcel)) != NO_ERROR) return status;
-    if ((status = parcel->readParcelable(&mDeviceTypeAddr)) != NO_ERROR) return status;
-    if ((status = parcel->readUint32(&mEncapsulationModes)) != NO_ERROR) return status;
-    if ((status = parcel->readUint32(&mEncapsulationMetadataTypes)) != NO_ERROR) return status;
-    return status;
+status_t DeviceDescriptorBase::writeToParcelable(media::DeviceDescriptorBase* parcelable) const {
+    AudioPort::writeToParcelable(&parcelable->port);
+    AudioPortConfig::writeToParcelable(&parcelable->portConfig);
+    parcelable->device = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_AudioDeviceTypeAddress(mDeviceTypeAddr));
+    parcelable->encapsulationModes = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_AudioEncapsulationMode_mask(mEncapsulationModes));
+    parcelable->encapsulationMetadataTypes = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_AudioEncapsulationMetadataType_mask(mEncapsulationMetadataTypes));
+    return OK;
+}
+
+status_t DeviceDescriptorBase::readFromParcel(const Parcel *parcel) {
+    media::DeviceDescriptorBase parcelable;
+    return parcelable.readFromParcel(parcel)
+        ?: readFromParcelable(parcelable);
+}
+
+status_t DeviceDescriptorBase::readFromParcelable(const media::DeviceDescriptorBase& parcelable) {
+    status_t status = AudioPort::readFromParcelable(parcelable.port)
+                      ?: AudioPortConfig::readFromParcelable(parcelable.portConfig);
+    if (status != OK) {
+        return status;
+    }
+    mDeviceTypeAddr = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_AudioDeviceTypeAddress(parcelable.device));
+    mEncapsulationModes = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_AudioEncapsulationMode_mask(parcelable.encapsulationModes));
+    mEncapsulationMetadataTypes = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_AudioEncapsulationMetadataType_mask(parcelable.encapsulationMetadataTypes));
+    return OK;
 }
 
 std::string toString(const DeviceDescriptorBaseVector& devices)
@@ -198,4 +218,24 @@
     return deviceTypeAddrs;
 }
 
+ConversionResult<sp<DeviceDescriptorBase>>
+aidl2legacy_DeviceDescriptorBase(const media::DeviceDescriptorBase& aidl) {
+    sp<DeviceDescriptorBase> result = new DeviceDescriptorBase(AUDIO_DEVICE_NONE);
+    status_t status = result->readFromParcelable(aidl);
+    if (status != OK) {
+        return base::unexpected(status);
+    }
+    return result;
+}
+
+ConversionResult<media::DeviceDescriptorBase>
+legacy2aidl_DeviceDescriptorBase(const sp<DeviceDescriptorBase>& legacy) {
+    media::DeviceDescriptorBase aidl;
+    status_t status = legacy->writeToParcelable(&aidl);
+    if (status != OK) {
+        return base::unexpected(status);
+    }
+    return aidl;
+}
+
 } // namespace android
diff --git a/media/libaudiofoundation/include/media/AudioGain.h b/media/libaudiofoundation/include/media/AudioGain.h
index 859f1e7..a06b686 100644
--- a/media/libaudiofoundation/include/media/AudioGain.h
+++ b/media/libaudiofoundation/include/media/AudioGain.h
@@ -16,8 +16,10 @@
 
 #pragma once
 
+#include <android/media/AudioGain.h>
 #include <binder/Parcel.h>
 #include <binder/Parcelable.h>
+#include <media/AidlConversion.h>
 #include <utils/Errors.h>
 #include <utils/RefBase.h>
 #include <system/audio.h>
@@ -72,6 +74,9 @@
     status_t writeToParcel(Parcel* parcel) const override;
     status_t readFromParcel(const Parcel* parcel) override;
 
+    status_t writeToParcelable(media::AudioGain* parcelable) const;
+    status_t readFromParcelable(const media::AudioGain& parcelable);
+
 private:
     int               mIndex;
     struct audio_gain mGain;
@@ -79,6 +84,12 @@
     bool              mUseForVolume = false;
 };
 
+// Conversion routines, according to AidlConversion.h conventions.
+ConversionResult<sp<AudioGain>>
+aidl2legacy_AudioGain(const media::AudioGain& aidl);
+ConversionResult<media::AudioGain>
+legacy2aidl_AudioGain(const sp<AudioGain>& legacy);
+
 class AudioGains : public std::vector<sp<AudioGain> >, public Parcelable
 {
 public:
@@ -104,4 +115,10 @@
     status_t readFromParcel(const Parcel* parcel) override;
 };
 
+// Conversion routines, according to AidlConversion.h conventions.
+ConversionResult<AudioGains>
+aidl2legacy_AudioGains(const std::vector<media::AudioGain>& aidl);
+ConversionResult<std::vector<media::AudioGain>>
+legacy2aidl_AudioGains(const AudioGains& legacy);
+
 } // namespace android
diff --git a/media/libaudiofoundation/include/media/AudioPort.h b/media/libaudiofoundation/include/media/AudioPort.h
index 622b97b..633e4e3 100644
--- a/media/libaudiofoundation/include/media/AudioPort.h
+++ b/media/libaudiofoundation/include/media/AudioPort.h
@@ -19,6 +19,8 @@
 #include <string>
 #include <type_traits>
 
+#include <android/media/AudioPort.h>
+#include <android/media/AudioPortConfig.h>
 #include <binder/Parcel.h>
 #include <binder/Parcelable.h>
 #include <media/AudioGain.h>
@@ -91,6 +93,9 @@
     status_t writeToParcel(Parcel* parcel) const override;
     status_t readFromParcel(const Parcel* parcel) override;
 
+    status_t writeToParcelable(media::AudioPort* parcelable) const;
+    status_t readFromParcelable(const media::AudioPort& parcelable);
+
     AudioGains mGains; // gain controllers
 protected:
     std::string  mName;
@@ -136,6 +141,8 @@
 
     status_t writeToParcel(Parcel* parcel) const override;
     status_t readFromParcel(const Parcel* parcel) override;
+    status_t writeToParcelable(media::AudioPortConfig* parcelable) const;
+    status_t readFromParcelable(const media::AudioPortConfig& parcelable);
 
 protected:
     unsigned int mSamplingRate = 0u;
diff --git a/media/libaudiofoundation/include/media/AudioProfile.h b/media/libaudiofoundation/include/media/AudioProfile.h
index ebe855e..57592bc 100644
--- a/media/libaudiofoundation/include/media/AudioProfile.h
+++ b/media/libaudiofoundation/include/media/AudioProfile.h
@@ -19,8 +19,10 @@
 #include <string>
 #include <vector>
 
+#include <android/media/AudioProfile.h>
 #include <binder/Parcel.h>
 #include <binder/Parcelable.h>
+#include <media/AidlConversion.h>
 #include <media/AudioContainers.h>
 #include <system/audio.h>
 #include <utils/RefBase.h>
@@ -73,6 +75,9 @@
     status_t writeToParcel(Parcel* parcel) const override;
     status_t readFromParcel(const Parcel* parcel) override;
 
+    ConversionResult<media::AudioProfile> toParcelable() const;
+    static ConversionResult<sp<AudioProfile>> fromParcelable(const media::AudioProfile& parcelable);
+
 private:
     std::string  mName;
     audio_format_t mFormat; // The format for an audio profile should only be set when initialized.
@@ -82,8 +87,17 @@
     bool mIsDynamicFormat = false;
     bool mIsDynamicChannels = false;
     bool mIsDynamicRate = false;
+
+    AudioProfile() = default;
+    AudioProfile& operator=(const AudioProfile& other);
 };
 
+// Conversion routines, according to AidlConversion.h conventions.
+ConversionResult<sp<AudioProfile>>
+aidl2legacy_AudioProfile(const media::AudioProfile& aidl);
+ConversionResult<media::AudioProfile>
+legacy2aidl_AudioProfile(const sp<AudioProfile>& legacy);
+
 class AudioProfileVector : public std::vector<sp<AudioProfile>>, public Parcelable
 {
 public:
@@ -117,4 +131,11 @@
 
 bool operator == (const AudioProfile &left, const AudioProfile &right);
 
+// Conversion routines, according to AidlConversion.h conventions.
+ConversionResult<AudioProfileVector>
+aidl2legacy_AudioProfileVector(const std::vector<media::AudioProfile>& aidl);
+ConversionResult<std::vector<media::AudioProfile>>
+legacy2aidl_AudioProfileVector(const AudioProfileVector& legacy);
+
+
 } // namespace android
diff --git a/media/libaudiofoundation/include/media/DeviceDescriptorBase.h b/media/libaudiofoundation/include/media/DeviceDescriptorBase.h
index 9ad8d3d..8a920b7 100644
--- a/media/libaudiofoundation/include/media/DeviceDescriptorBase.h
+++ b/media/libaudiofoundation/include/media/DeviceDescriptorBase.h
@@ -18,6 +18,7 @@
 
 #include <vector>
 
+#include <android/media/DeviceDescriptorBase.h>
 #include <binder/Parcel.h>
 #include <binder/Parcelable.h>
 #include <media/AudioContainers.h>
@@ -76,6 +77,9 @@
     status_t writeToParcel(Parcel* parcel) const override;
     status_t readFromParcel(const Parcel* parcel) override;
 
+    status_t writeToParcelable(media::DeviceDescriptorBase* parcelable) const;
+    status_t readFromParcelable(const media::DeviceDescriptorBase& parcelable);
+
 protected:
     AudioDeviceTypeAddr mDeviceTypeAddr;
     uint32_t mEncapsulationModes = 0;
@@ -107,4 +111,10 @@
  */
 AudioDeviceTypeAddrVector deviceTypeAddrsFromDescriptors(const DeviceDescriptorBaseVector& devices);
 
+// Conversion routines, according to AidlConversion.h conventions.
+ConversionResult<sp<DeviceDescriptorBase>>
+aidl2legacy_DeviceDescriptorBase(const media::DeviceDescriptorBase& aidl);
+ConversionResult<media::DeviceDescriptorBase>
+legacy2aidl_DeviceDescriptorBase(const sp<DeviceDescriptorBase>& legacy);
+
 } // namespace android
diff --git a/media/libmediahelper/Android.bp b/media/libmediahelper/Android.bp
index 0779a8e..e9847cc 100644
--- a/media/libmediahelper/Android.bp
+++ b/media/libmediahelper/Android.bp
@@ -9,6 +9,12 @@
             enabled: false,
         },
     },
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.bluetooth.updatable",
+        "com.android.media",
+        "com.android.media.swcodec",
+    ],
 }
 
 cc_library {
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 8b94f43..9ba99bc 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -2568,20 +2568,28 @@
     return 0;
 }
 
-status_t AudioFlinger::openOutput(audio_module_handle_t module,
-                                  audio_io_handle_t *output,
-                                  audio_config_t *config,
-                                  const sp<DeviceDescriptorBase>& device,
-                                  uint32_t *latencyMs,
-                                  audio_output_flags_t flags)
+status_t AudioFlinger::openOutput(const media::OpenOutputRequest& request,
+                                media::OpenOutputResponse* response)
 {
+    audio_module_handle_t module = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_int32_t_audio_module_handle_t(request.module));
+    audio_config_t config = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_AudioConfig_audio_config_t(request.config));
+    sp<DeviceDescriptorBase> device = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_DeviceDescriptorBase(request.device));
+    audio_output_flags_t flags = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_audio_output_flags_mask(request.flags));
+
+    audio_io_handle_t output;
+    uint32_t latencyMs;
+
     ALOGI("openOutput() this %p, module %d Device %s, SamplingRate %d, Format %#08x, "
               "Channels %#x, flags %#x",
               this, module,
               device->toString().c_str(),
-              config->sample_rate,
-              config->format,
-              config->channel_mask,
+              config.sample_rate,
+              config.format,
+              config.channel_mask,
               flags);
 
     audio_devices_t deviceType = device->type();
@@ -2593,11 +2601,11 @@
 
     Mutex::Autolock _l(mLock);
 
-    sp<ThreadBase> thread = openOutput_l(module, output, config, deviceType, address, flags);
+    sp<ThreadBase> thread = openOutput_l(module, &output, &config, deviceType, address, flags);
     if (thread != 0) {
         if ((flags & AUDIO_OUTPUT_FLAG_MMAP_NOIRQ) == 0) {
             PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
-            *latencyMs = playbackThread->latency();
+            latencyMs = playbackThread->latency();
 
             // notify client processes of the new output creation
             playbackThread->ioConfigChanged(AUDIO_OUTPUT_OPENED);
@@ -2617,6 +2625,10 @@
             MmapThread *mmapThread = (MmapThread *)thread.get();
             mmapThread->ioConfigChanged(AUDIO_OUTPUT_OPENED);
         }
+        response->output = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_io_handle_t_int32_t(output));
+        response->config = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_config_t_AudioConfig(config));
+        response->latencyMs = VALUE_OR_RETURN_STATUS(convertIntegral<int32_t>(latencyMs));
+        response->flags = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_output_flags_mask(flags));
         return NO_ERROR;
     }
 
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 50dd8f6..6dfc48f 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -180,12 +180,8 @@
     virtual     size_t      getInputBufferSize(uint32_t sampleRate, audio_format_t format,
                                                audio_channel_mask_t channelMask) const;
 
-    virtual status_t openOutput(audio_module_handle_t module,
-                                audio_io_handle_t *output,
-                                audio_config_t *config,
-                                const sp<DeviceDescriptorBase>& device,
-                                uint32_t *latencyMs,
-                                audio_output_flags_t flags);
+    virtual status_t openOutput(const media::OpenOutputRequest& request,
+                                media::OpenOutputResponse* response);
 
     virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1,
                                                   audio_io_handle_t output2);
diff --git a/services/audiopolicy/service/AudioPolicyClientImpl.cpp b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
index 4876fe7..dd128a2 100644
--- a/services/audiopolicy/service/AudioPolicyClientImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
@@ -50,7 +50,22 @@
         ALOGW("%s: could not get AudioFlinger", __func__);
         return PERMISSION_DENIED;
     }
-    return af->openOutput(module, output, config, device, latencyMs, flags);
+
+    media::OpenOutputRequest request;
+    media::OpenOutputResponse response;
+
+    request.module = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_module_handle_t_int32_t(module));
+    request.config = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_config_t_AudioConfig(*config));
+    request.device = VALUE_OR_RETURN_STATUS(legacy2aidl_DeviceDescriptorBase(device));
+    request.flags = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_output_flags_mask(flags));
+
+    status_t status = af->openOutput(request, &response);
+    if (status == OK) {
+        *output = VALUE_OR_RETURN_STATUS(aidl2legacy_int32_t_audio_io_handle_t(response.output));
+        *config = VALUE_OR_RETURN_STATUS(aidl2legacy_AudioConfig_audio_config_t(response.config));
+        *latencyMs = VALUE_OR_RETURN_STATUS(convertIntegral<uint32_t>(response.latencyMs));
+    }
+    return status;
 }
 
 audio_io_handle_t AudioPolicyService::AudioPolicyClient::openDuplicateOutput(