am e737cda6: audioflinger: refine latency latency calculation. (cf0bf78c) · Commits · e / os / android_frameworks_av

services/audioflinger/AudioFlinger.cpp

+16 −1

Original line number	Diff line number	Diff line
		@@ -1804,11 +1804,25 @@ Exit:
		return track;
		}

		uint32_t AudioFlinger::MixerThread::correctLatency(uint32_t latency) const
		{
		if (mFastMixer != NULL) {
		MonoPipe pipe = (MonoPipe )mPipeSink.get();
		latency += (pipe->getAvgFrames() * 1000) / mSampleRate;
		}
		return latency;
		}

		uint32_t AudioFlinger::PlaybackThread::correctLatency(uint32_t latency) const
		{
		return latency;
		}

		uint32_t AudioFlinger::PlaybackThread::latency() const
		{
		Mutex::Autolock _l(mLock);
		if (initCheck() == NO_ERROR) {
		return mOutput->stream->get_latency(mOutput->stream);
		return correctLatency(mOutput->stream->get_latency(mOutput->stream));
		} else {
		return 0;
		}
		@@ -2020,6 +2034,7 @@ void AudioFlinger::PlaybackThread::readOutputParameters()
		}
		}


		status_t AudioFlinger::PlaybackThread::getRenderPosition(uint32_t halFrames, uint32_t dspFrames)
		{
		if (halFrames == NULL \|\| dspFrames == NULL) {

+3 −0

Original line number	Diff line number	Diff line
		@@ -1048,6 +1048,8 @@ public:
		// Cache various calculated values, at threadLoop() entry and after a parameter change
		virtual void cacheParameters_l();

		virtual uint32_t correctLatency(uint32_t latency) const;

		private:

		friend class AudioFlinger; // for numerous
		@@ -1154,6 +1156,7 @@ public:
		virtual void threadLoop_mix();
		virtual void threadLoop_sleepTime();
		virtual void threadLoop_removeTracks(const Vector< sp<Track> >& tracksToRemove);
		virtual uint32_t correctLatency(uint32_t latency) const;

		AudioMixer* mAudioMixer; // normal mixer
		private:

+4 −0

Original line number	Diff line number	Diff line
		@@ -56,6 +56,10 @@ public:
		virtual ssize_t write(const void *buffer, size_t count);
		//virtual ssize_t writeVia(writeVia_t via, size_t total, void *user, size_t block);

		// average number of frames present in the pipe under normal conditions.
		// See throttling mechanism in MonoPipe::write()
		size_t getAvgFrames() const { return (mMaxFrames * 11) / 16; }

		private:
		const size_t mMaxFrames; // always a power of 2
		void * const mBuffer;