Merge "Fix wait time for audio threads in suspend mode" into oc-dev (24fd2f7d) · Commits · e / devices / smdk4412 / android_frameworks_av

services/audioflinger/Threads.cpp

+27 −0

Original line number	Diff line number	Diff line
		@@ -2962,6 +2962,10 @@ bool AudioFlinger::PlaybackThread::threadLoop()
		// and then that string will be logged at the next convenient opportunity.
		const char *logString = NULL;

		// Estimated time for next buffer to be written to hal. This is used only on
		// suspended mode (for now) to help schedule the wait time until next iteration.
		nsecs_t timeLoopNextNs = 0;

		checkSilentMode_l();
		#if 0
		int z = 0; // used in logFormat example
		@@ -3327,6 +3331,29 @@ bool AudioFlinger::PlaybackThread::threadLoop()
		} else {
		ATRACE_BEGIN("sleep");
		Mutex::Autolock _l(mLock);
		// suspended requires accurate metering of sleep time.
		if (isSuspended()) {
		// advance by expected sleepTime
		timeLoopNextNs += microseconds((nsecs_t)mSleepTimeUs);
		const nsecs_t nowNs = systemTime();

		// compute expected next time vs current time.
		// (negative deltas are treated as delays).
		nsecs_t deltaNs = timeLoopNextNs - nowNs;
		if (deltaNs < -kMaxNextBufferDelayNs) {
		// Delays longer than the max allowed trigger a reset.
		ALOGV("DelayNs: %lld, resetting timeLoopNextNs", (long long) deltaNs);
		deltaNs = microseconds((nsecs_t)mSleepTimeUs);
		timeLoopNextNs = nowNs + deltaNs;
		} else if (deltaNs < 0) {
		// Delays within the max delay allowed: zero the delta/sleepTime
		// to help the system catch up in the next iteration(s)
		ALOGV("DelayNs: %lld, catching-up", (long long) deltaNs);
		deltaNs = 0;
		}
		// update sleep time (which is >= 0)
		mSleepTimeUs = deltaNs / 1000;
		}
		if (!mSignalPending && mConfigEvents.isEmpty() && !exitPending()) {
		mWaitWorkCV.waitRelative(mLock, microseconds((nsecs_t)mSleepTimeUs));
		}

services/audioflinger/Threads.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -623,6 +623,12 @@ public:
		// 14 tracks max per client allows for 2 misbehaving application leaving 4 available tracks.
		static const uint32_t kMaxTracksPerUid = 14;

		// Maximum delay (in nanoseconds) for upcoming buffers in suspend mode, otherwise
		// if delay is greater, the estimated time for timeLoopNextNs is reset.
		// This allows for catch-up to be done for small delays, while resetting the estimate
		// for initial conditions or large delays.
		static const nsecs_t kMaxNextBufferDelayNs = 100000000;

		PlaybackThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output,
		audio_io_handle_t id, audio_devices_t device, type_t type, bool systemReady);
		virtual ~PlaybackThread();