Adding explicit routing API to AudioTrack (aa981194) · Commits · e / os / android_frameworks_av

include/media/AudioSystem.h

+9 −8

Original line number	Diff line number	Diff line
		@@ -228,6 +228,7 @@ public:
		audio_format_t format = AUDIO_FORMAT_DEFAULT,
		audio_channel_mask_t channelMask = AUDIO_CHANNEL_OUT_STEREO,
		audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
		audio_port_handle_t selectedDeviceId = AUDIO_PORT_HANDLE_NONE,
		const audio_offload_info_t *offloadInfo = NULL);
		static status_t startOutput(audio_io_handle_t output,
		audio_stream_type_t stream,

include/media/AudioTrack.h

+24 −0

Original line number	Diff line number	Diff line
		@@ -477,6 +477,26 @@ private:
		audio_io_handle_t getOutput() const;
		public:

		/* Selects the audio device to use for output of this AudioTrack. A value of
		* AUDIO_PORT_HANDLE_NONE indicates default (AudioPolicyManager) routing.
		*
		* Parameters:
		* The device ID of the selected device (as returned by the AudioDevicesManager API).
		*
		* Returned value:
		* - NO_ERROR: successful operation
		* TODO: what else can happen here?
		*/
		status_t setOutputDevice(audio_port_handle_t deviceId);

		/* Returns the ID of the audio device used for output of this AudioTrack.
		* A value of AUDIO_PORT_HANDLE_NONE indicates default (AudioPolicyManager) routing.
		*
		* Parameters:
		* none.
		*/
		audio_port_handle_t getOutputDevice();

		/* Returns the unique session ID associated with this track.
		*
		* Parameters:
		@@ -817,6 +837,10 @@ protected:
		bool mInUnderrun; // whether track is currently in underrun state
		uint32_t mPausedPosition;

		// For Device Selection API
		// a value of AUDIO_PORT_HANDLE_NONE indicated default (AudioPolicyManager) routing.
		int mSelectedDeviceId;

		private:
		class DeathNotifier : public IBinder::DeathRecipient {
		public:

include/media/IAudioPolicyService.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -66,6 +66,7 @@ public:
		audio_format_t format = AUDIO_FORMAT_DEFAULT,
		audio_channel_mask_t channelMask = 0,
		audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
		audio_port_handle_t selectedDeviceId = AUDIO_PORT_HANDLE_NONE,
		const audio_offload_info_t *offloadInfo = NULL) = 0;
		virtual status_t startOutput(audio_io_handle_t output,
		audio_stream_type_t stream,

media/libmedia/AudioSystem.cpp

+2 −1

Original line number	Diff line number	Diff line
		@@ -658,13 +658,14 @@ status_t AudioSystem::getOutputForAttr(const audio_attributes_t *attr,
		audio_format_t format,
		audio_channel_mask_t channelMask,
		audio_output_flags_t flags,
		audio_port_handle_t selectedDeviceId,
		const audio_offload_info_t *offloadInfo)
		{
		const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
		if (aps == 0) return NO_INIT;
		return aps->getOutputForAttr(attr, output, session, stream,
		samplingRate, format, channelMask,
		flags, offloadInfo);
		flags, selectedDeviceId, offloadInfo);
		}

		status_t AudioSystem::startOutput(audio_io_handle_t output,

media/libmedia/AudioTrack.cpp

+26 −7

Original line number	Diff line number	Diff line
		@@ -121,7 +121,8 @@ AudioTrack::AudioTrack()
		mIsTimed(false),
		mPreviousPriority(ANDROID_PRIORITY_NORMAL),
		mPreviousSchedulingGroup(SP_DEFAULT),
		mPausedPosition(0)
		mPausedPosition(0),
		mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE)
		{
		mAttributes.content_type = AUDIO_CONTENT_TYPE_UNKNOWN;
		mAttributes.usage = AUDIO_USAGE_UNKNOWN;
		@@ -149,7 +150,8 @@ AudioTrack::AudioTrack(
		mIsTimed(false),
		mPreviousPriority(ANDROID_PRIORITY_NORMAL),
		mPreviousSchedulingGroup(SP_DEFAULT),
		mPausedPosition(0)
		mPausedPosition(0),
		mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE)
		{
		mStatus = set(streamType, sampleRate, format, channelMask,
		frameCount, flags, cbf, user, notificationFrames,
		@@ -177,7 +179,8 @@ AudioTrack::AudioTrack(
		mIsTimed(false),
		mPreviousPriority(ANDROID_PRIORITY_NORMAL),
		mPreviousSchedulingGroup(SP_DEFAULT),
		mPausedPosition(0)
		mPausedPosition(0),
		mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE)
		{
		mStatus = set(streamType, sampleRate, format, channelMask,
		0 /frameCount/, flags, cbf, user, notificationFrames,
		@@ -928,6 +931,21 @@ audio_io_handle_t AudioTrack::getOutput() const
		return mOutput;
		}

		status_t AudioTrack::setOutputDevice(audio_port_handle_t deviceId) {
		AutoMutex lock(mLock);
		if (mSelectedDeviceId != deviceId) {
		mSelectedDeviceId = deviceId;
		return restoreTrack_l("setOutputDevice() restart");
		} else {
		return NO_ERROR;
		}
		}

		audio_port_handle_t AudioTrack::getOutputDevice() {
		AutoMutex lock(mLock);
		return mSelectedDeviceId;
		}

		status_t AudioTrack::attachAuxEffect(int effectId)
		{
		AutoMutex lock(mLock);
		@@ -960,11 +978,12 @@ status_t AudioTrack::createTrack_l()
		audio_io_handle_t output;
		audio_stream_type_t streamType = mStreamType;
		audio_attributes_t *attr = (mStreamType == AUDIO_STREAM_DEFAULT) ? &mAttributes : NULL;
		status_t status = AudioSystem::getOutputForAttr(attr, &output,

		status_t status;
		status = AudioSystem::getOutputForAttr(attr, &output,
		(audio_session_t)mSessionId, &streamType,
		mSampleRate, mFormat, mChannelMask,
		mFlags, mOffloadInfo);

		mFlags, mSelectedDeviceId, mOffloadInfo);

		if (status != NO_ERROR \|\| output == AUDIO_IO_HANDLE_NONE) {
		ALOGE("Could not get audio output for session %d, stream type %d, usage %d, sample rate %u, format %#x,"