Merge "aaudio: lower latency using MMAP capture" into oc-dev (00f56e2c) · Commits · e / os / android_frameworks_av

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

+13 −12

Original line number	Diff line number	Diff line
		@@ -24,12 +24,11 @@
		#include <aaudio/AAudio.h>

		#define SAMPLE_RATE 48000
		#define NUM_SECONDS 10
		#define NUM_SECONDS 6
		#define NANOS_PER_MICROSECOND ((int64_t)1000)
		#define NANOS_PER_MILLISECOND (NANOS_PER_MICROSECOND * 1000)
		#define NANOS_PER_SECOND (NANOS_PER_MILLISECOND * 1000)

		#define DECAY_FACTOR 0.999
		#define MIN_FRAMES_TO_READ 48 /* arbitrary, 1 msec at 48000 Hz */

		static const char *getSharingModeText(aaudio_sharing_mode_t mode) {
		@@ -59,6 +58,7 @@ int main(int argc, char **argv)
		aaudio_audio_format_t actualDataFormat;

		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;

		AAudioStreamBuilder *aaudioBuilder = nullptr;
		@@ -143,27 +143,27 @@ int main(int argc, char **argv)
		state = AAudioStream_getState(aaudioStream);
		printf("after start, state = %s\n", AAudio_convertStreamStateToText(state));

		// Play for a while.
		// Record for a while.
		framesToRecord = actualSampleRate * NUM_SECONDS;
		framesLeft = framesToRecord;
		while (framesLeft > 0) {
		// Read audio data from the stream.
		int64_t timeoutNanos = 100 * NANOS_PER_MILLISECOND;
		const int64_t timeoutNanos = 100 * NANOS_PER_MILLISECOND;
		int minFrames = (framesToRecord < framesPerRead) ? framesToRecord : framesPerRead;
		int actual = AAudioStream_read(aaudioStream, data, minFrames, timeoutNanos);
		if (actual < 0) {
		fprintf(stderr, "ERROR - AAudioStream_read() returned %zd\n", actual);
		fprintf(stderr, "ERROR - AAudioStream_read() returned %d\n", actual);
		result = actual;
		goto finish;
		} else if (actual == 0) {
		fprintf(stderr, "WARNING - AAudioStream_read() returned %zd\n", actual);
		fprintf(stderr, "WARNING - AAudioStream_read() returned %d\n", actual);
		goto finish;
		}
		framesLeft -= actual;

		// Peak follower.
		// Peak finder.
		for (int frameIndex = 0; frameIndex < actual; frameIndex++) {
		float sample = data[frameIndex * actualSamplesPerFrame] * (1.0/32768);
		peakLevel *= DECAY_FACTOR;
		if (sample > peakLevel) {
		peakLevel = sample;
		}
		@@ -177,6 +177,7 @@ int main(int argc, char **argv)
		printf("*");
		}
		printf("\n");
		peakLevel = 0.0;
		}
		}

		@@ -184,9 +185,9 @@ int main(int argc, char **argv)
		printf("AAudioStream_getXRunCount %d\n", xRunCount);

		finish:
		delete[] data;
		AAudioStream_close(aaudioStream);
		AAudioStreamBuilder_delete(aaudioBuilder);
		delete[] data;
		printf("exiting - AAudio result = %d = %s\n", result, AAudio_convertResultToText(result));
		return (result != AAUDIO_OK) ? EXIT_FAILURE : EXIT_SUCCESS;
		}

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

+4 −4

Original line number	Diff line number	Diff line
		@@ -94,7 +94,7 @@ public:
		AAudioStreamBuilder_setDirection(mBuilder, AAUDIO_DIRECTION_INPUT);
		AAudioStreamBuilder_setSharingMode(mBuilder, mRequestedSharingMode);
		AAudioStreamBuilder_setDataCallback(mBuilder, proc, userContext);
		AAudioStreamBuilder_setFormat(mBuilder, AAUDIO_FORMAT_PCM_FLOAT);
		AAudioStreamBuilder_setFormat(mBuilder, AAUDIO_FORMAT_PCM_I16);

		// Open an AAudioStream using the Builder.
		result = AAudioStreamBuilder_openStream(mBuilder, &mStream);
		@@ -285,7 +285,7 @@ int main(int argc, char **argv)
		if (result != AAUDIO_OK) {
		goto error;
		}
		sleep(1);
		usleep(2000 * 1000);
		result = recorder.start();
		if (result != AAUDIO_OK) {
		fprintf(stderr, "ERROR - recorder.start() returned %d\n", result);

media/libaaudio/examples/loopback/src/loopback.cpp

+2 −2

Original line number	Diff line number	Diff line
		@@ -344,8 +344,8 @@ int main(int argc, const char **argv)
		aaudio_audio_format_t actualInputFormat;
		aaudio_audio_format_t actualOutputFormat;

		//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;
		//const aaudio_sharing_mode_t requestedSharingMode = AAUDIO_SHARING_MODE_SHARED;
		aaudio_sharing_mode_t actualSharingMode;

		AAudioStreamBuilder *builder = nullptr;

media/libaaudio/src/Android.mk

+4 −0

Original line number	Diff line number	Diff line
		@@ -44,6 +44,8 @@ LOCAL_SRC_FILES = \
		fifo/FifoControllerBase.cpp \
		client/AudioEndpoint.cpp \
		client/AudioStreamInternal.cpp \
		client/AudioStreamInternalCapture.cpp \
		client/AudioStreamInternalPlay.cpp \
		client/IsochronousClockModel.cpp \
		binding/AudioEndpointParcelable.cpp \
		binding/AAudioBinderClient.cpp \
		@@ -99,6 +101,8 @@ LOCAL_SRC_FILES = core/AudioStream.cpp \
		fifo/FifoControllerBase.cpp \
		client/AudioEndpoint.cpp \
		client/AudioStreamInternal.cpp \
		client/AudioStreamInternalCapture.cpp \
		client/AudioStreamInternalPlay.cpp \
		client/IsochronousClockModel.cpp \
		binding/AudioEndpointParcelable.cpp \
		binding/AAudioBinderClient.cpp \

media/libaaudio/src/binding/AAudioServiceDefinitions.h

+1 −2

Original line number	Diff line number	Diff line
		@@ -77,8 +77,7 @@ typedef struct EndpointDescriptor_s {
		// Set capacityInFrames to zero if Queue is unused.
		RingBufferDescriptor upMessageQueueDescriptor; // server to client
		RingBufferDescriptor downMessageQueueDescriptor; // client to server
		RingBufferDescriptor upDataQueueDescriptor; // eg. record
		RingBufferDescriptor downDataQueueDescriptor; // eg. playback
		RingBufferDescriptor dataQueueDescriptor; // playback or capture
		} EndpointDescriptor;

		} // namespace aaudio