Allow kFastTrackMultiplier to be specified per device (0349009f) · Commits · e / os / android_frameworks_av

services/audioflinger/Threads.cpp

+31 −1

Original line number	Original line	Diff line number	Diff line
	@@ -142,8 +142,17 @@ static const int kPriorityFastMixer = 3;
	// FIXME It would be better for client to tell AudioFlinger the value of N,		// FIXME It would be better for client to tell AudioFlinger the value of N,
	// so AudioFlinger could allocate the right amount of memory.		// so AudioFlinger could allocate the right amount of memory.
	// See the client's minBufCount and mNotificationFramesAct calculations for details.		// See the client's minBufCount and mNotificationFramesAct calculations for details.

			// This is the default value, if not specified by property.
	static const int kFastTrackMultiplier = 2;		static const int kFastTrackMultiplier = 2;

			// The minimum and maximum allowed values
			static const int kFastTrackMultiplierMin = 1;
			static const int kFastTrackMultiplierMax = 2;

			// The actual value to use, which can be specified per-device via property af.fast_track_multiplier.
			static int sFastTrackMultiplier = kFastTrackMultiplier;

	// See Thread::readOnlyHeap().		// See Thread::readOnlyHeap().
	// Initially this heap is used to allocate client buffers for "fast" AudioRecord.		// Initially this heap is used to allocate client buffers for "fast" AudioRecord.
	// Eventually it will be the single buffer that FastCapture writes into via HAL read(),		// Eventually it will be the single buffer that FastCapture writes into via HAL read(),
	@@ -152,6 +161,22 @@ static const size_t kRecordThreadReadOnlyHeapSize = 0x1000;

	// ----------------------------------------------------------------------------		// ----------------------------------------------------------------------------

			static pthread_once_t sFastTrackMultiplierOnce = PTHREAD_ONCE_INIT;

			static void sFastTrackMultiplierInit()
			{
			char value[PROPERTY_VALUE_MAX];
			if (property_get("af.fast_track_multiplier", value, NULL) > 0) {
			char *endptr;
			unsigned long ul = strtoul(value, &endptr, 0);
			if (*endptr == '\0' && kFastTrackMultiplierMin <= ul && ul <= kFastTrackMultiplierMax) {
			sFastTrackMultiplier = (int) ul;
			}
			}
			}

			// ----------------------------------------------------------------------------

	#ifdef ADD_BATTERY_DATA		#ifdef ADD_BATTERY_DATA
	// To collect the amplifier usage		// To collect the amplifier usage
	static void addBatteryData(uint32_t params) {		static void addBatteryData(uint32_t params) {
	@@ -1321,7 +1346,12 @@ sp<AudioFlinger::PlaybackThread::Track> AudioFlinger::PlaybackThread::createTrac
	) {		) {
	// if frameCount not specified, then it defaults to fast mixer (HAL) frame count		// if frameCount not specified, then it defaults to fast mixer (HAL) frame count
	if (frameCount == 0) {		if (frameCount == 0) {
	frameCount = mFrameCount * kFastTrackMultiplier;		// read the fast track multiplier property the first time it is needed
			int ok = pthread_once(&sFastTrackMultiplierOnce, sFastTrackMultiplierInit);
			if (ok != 0) {
			ALOGE("%s pthread_once failed: %d", __func__, ok);
			}
			frameCount = mFrameCount * sFastTrackMultiplier;
	}		}
	ALOGV("AUDIO_OUTPUT_FLAG_FAST accepted: frameCount=%d mFrameCount=%d",		ALOGV("AUDIO_OUTPUT_FLAG_FAST accepted: frameCount=%d mFrameCount=%d",
	frameCount, mFrameCount);		frameCount, mFrameCount);