aaudio: enable exclusive MMAP mode support (b66815f3) · Commits · e / os / android_frameworks_av

media/libaaudio/examples/input_monitor/src/input_monitor.cpp

+3 −3

Original line number	Diff line number	Diff line
		@@ -48,8 +48,8 @@ int main(int argc, char **argv)
		//aaudio_performance_mode_t requestedPerformanceMode = AAUDIO_PERFORMANCE_MODE_NONE;
		const aaudio_performance_mode_t requestedPerformanceMode = AAUDIO_PERFORMANCE_MODE_LOW_LATENCY;
		//aaudio_performance_mode_t requestedPerformanceMode = AAUDIO_PERFORMANCE_MODE_POWER_SAVING;
		const aaudio_sharing_mode_t requestedSharingMode = AAUDIO_SHARING_MODE_SHARED;
		//const aaudio_sharing_mode_t requestedSharingMode = AAUDIO_SHARING_MODE_EXCLUSIVE;
		//const aaudio_sharing_mode_t requestedSharingMode = AAUDIO_SHARING_MODE_SHARED;
		const aaudio_sharing_mode_t requestedSharingMode = AAUDIO_SHARING_MODE_EXCLUSIVE;
		aaudio_sharing_mode_t actualSharingMode;

		AAudioStream *aaudioStream = nullptr;
		@@ -70,7 +70,7 @@ int main(int argc, char **argv)

		printf("%s - Monitor input level using AAudio\n", argv[0]);

		// AAudio_setMMapPolicy(AAUDIO_POLICY_ALWAYS);
		AAudio_setMMapPolicy(AAUDIO_POLICY_ALWAYS);

		recorder.setPerformanceMode(requestedPerformanceMode);
		recorder.setSharingMode(requestedSharingMode);

media/libaaudio/examples/write_sine/src/write_sine.cpp

+4 −4

Original line number	Diff line number	Diff line
		@@ -27,15 +27,15 @@
		#define SAMPLE_RATE 48000
		#define NUM_SECONDS 4

		#define MMAP_POLICY AAUDIO_UNSPECIFIED
		//#define MMAP_POLICY AAUDIO_UNSPECIFIED
		//#define MMAP_POLICY AAUDIO_POLICY_NEVER
		//#define MMAP_POLICY AAUDIO_POLICY_AUTO
		//#define MMAP_POLICY AAUDIO_POLICY_ALWAYS
		#define MMAP_POLICY AAUDIO_POLICY_ALWAYS

		#define REQUESTED_FORMAT AAUDIO_FORMAT_PCM_I16

		#define REQUESTED_SHARING_MODE AAUDIO_SHARING_MODE_SHARED
		//#define REQUESTED_SHARING_MODE AAUDIO_SHARING_MODE_EXCLUSIVE
		//#define REQUESTED_SHARING_MODE AAUDIO_SHARING_MODE_SHARED
		#define REQUESTED_SHARING_MODE AAUDIO_SHARING_MODE_EXCLUSIVE


		int main(int argc, char **argv)

media/libaaudio/src/client/AudioStreamInternal.cpp

+1 −0

Original line number	Diff line number	Diff line
		@@ -115,6 +115,7 @@ aaudio_result_t AudioStreamInternal::open(const AudioStreamBuilder &builder) {
		setSampleRate(configuration.getSampleRate());
		setSamplesPerFrame(configuration.getSamplesPerFrame());
		setDeviceId(configuration.getDeviceId());
		setSharingMode(configuration.getSharingMode());

		// Save device format so we can do format conversion and volume scaling together.
		mDeviceFormat = configuration.getAudioFormat();

services/oboeservice/AAudioService.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -107,7 +107,7 @@ aaudio_handle_t AAudioService::openStream(const aaudio::AAudioStreamRequest &req
		}

		if (sharingMode == AAUDIO_SHARING_MODE_EXCLUSIVE) {
		serviceStream = new AAudioServiceStreamMMAP();
		serviceStream = new AAudioServiceStreamMMAP(mCachedUserId);
		result = serviceStream->open(request, configurationOutput);
		if (result != AAUDIO_OK) {
		// fall back to using a shared stream

services/oboeservice/AAudioServiceStreamMMAP.cpp

+25 −6

Original line number	Diff line number	Diff line
		@@ -41,11 +41,12 @@ using namespace aaudio;
		* Service Stream that uses an MMAP buffer.
		*/

		AAudioServiceStreamMMAP::AAudioServiceStreamMMAP()
		AAudioServiceStreamMMAP::AAudioServiceStreamMMAP(uid_t serviceUid)
		: AAudioServiceStreamBase()
		, mMmapStreamCallback(new MyMmapStreamCallback(*this))
		, mPreviousFrameCounter(0)
		, mMmapStream(nullptr) {
		, mMmapStream(nullptr)
		, mCachedUserId(serviceUid) {
		}

		AAudioServiceStreamMMAP::~AAudioServiceStreamMMAP() {
		@@ -153,10 +154,29 @@ aaudio_result_t AAudioServiceStreamMMAP::open(const aaudio::AAudioStreamRequest
		status);
		return AAUDIO_ERROR_UNAVAILABLE;
		} else {
		ALOGD("createMmapBuffer status %d shared_address = %p buffer_size %d burst_size %d",
		ALOGD("createMmapBuffer status %d shared_address = %p buffer_size %d burst_size %d"
		"Sharable FD: %s",
		status, mMmapBufferinfo.shared_memory_address,
		mMmapBufferinfo.buffer_size_frames,
		mMmapBufferinfo.burst_size_frames);
		abs(mMmapBufferinfo.buffer_size_frames),
		mMmapBufferinfo.burst_size_frames,
		mMmapBufferinfo.buffer_size_frames < 0 ? "Yes" : "No");
		}

		mCapacityInFrames = mMmapBufferinfo.buffer_size_frames;
		// FIXME: the audio HAL indicates if the shared memory fd can be shared outside of audioserver
		// by returning a negative buffer size
		if (mCapacityInFrames < 0) {
		// Exclusive mode is possible from any client
		mCapacityInFrames = -mCapacityInFrames;
		} else {
		// exclusive mode is only possible if the final fd destination is inside audioserver
		if ((mMmapClient.clientUid != mCachedUserId) &&
		configurationInput.getSharingMode() == AAUDIO_SHARING_MODE_EXCLUSIVE) {
		// Fallback is handled by caller but indicate what is possible in case
		// this is used in the future
		configurationOutput.setSharingMode(AAUDIO_SHARING_MODE_SHARED);
		return AAUDIO_ERROR_UNAVAILABLE;
		}
		}

		// Get information about the stream and pass it back to the caller.
		@@ -166,7 +186,6 @@ aaudio_result_t AAudioServiceStreamMMAP::open(const aaudio::AAudioStreamRequest

		mAudioDataFileDescriptor = mMmapBufferinfo.shared_memory_fd;
		mFramesPerBurst = mMmapBufferinfo.burst_size_frames;
		mCapacityInFrames = mMmapBufferinfo.buffer_size_frames;
		mAudioFormat = AAudioConvert_androidToAAudioDataFormat(config.format);
		mSampleRate = config.sample_rate;