MediaClock: add timer (7b6f67d1) · Commits · e / os / android_frameworks_av

media/libmediaplayerservice/nuplayer/NuPlayerDriver.cpp

+2 −0

Original line number	Diff line number	Diff line
		@@ -78,6 +78,8 @@ NuPlayerDriver::NuPlayerDriver(pid_t pid)
		ALOGD("NuPlayerDriver(%p) created, clientPid(%d)", this, pid);
		mLooper->setName("NuPlayerDriver Looper");

		mMediaClock->init();

		// set up an analytics record
		mAnalyticsItem = new MediaAnalyticsItem(kKeyPlayer);
		mAnalyticsItem->generateSessionID();

media/libstagefright/MediaClock.cpp

+101 −2

Original line number	Diff line number	Diff line
		@@ -21,7 +21,7 @@
		#include <media/stagefright/MediaClock.h>

		#include <media/stagefright/foundation/ADebug.h>
		#include <media/stagefright/foundation/ALooper.h>
		#include <media/stagefright/foundation/AMessage.h>

		namespace android {

		@@ -34,10 +34,41 @@ MediaClock::MediaClock()
		mAnchorTimeRealUs(-1),
		mMaxTimeMediaUs(INT64_MAX),
		mStartingTimeMediaUs(-1),
		mPlaybackRate(1.0) {
		mPlaybackRate(1.0),
		mGeneration(0) {
		mLooper = new ALooper;
		mLooper->setName("MediaClock");
		mLooper->start(false /* runOnCallingThread */,
		false /* canCallJava */,
		ANDROID_PRIORITY_AUDIO);
		}

		void MediaClock::init() {
		mLooper->registerHandler(this);
		}

		MediaClock::~MediaClock() {
		reset();
		if (mLooper != NULL) {
		mLooper->unregisterHandler(id());
		mLooper->stop();
		}
		}

		void MediaClock::reset() {
		Mutex::Autolock autoLock(mLock);
		auto it = mTimers.begin();
		while (it != mTimers.end()) {
		it->second->setInt32("reason", TIMER_REASON_RESET);
		it->second->post();
		it = mTimers.erase(it);
		}
		mAnchorTimeMediaUs = -1;
		mAnchorTimeRealUs = -1;
		mMaxTimeMediaUs = INT64_MAX;
		mStartingTimeMediaUs = -1;
		mPlaybackRate = 1.0;
		++mGeneration;
		}

		void MediaClock::setStartingTimeMedia(int64_t startingTimeMediaUs) {
		@@ -82,6 +113,9 @@ void MediaClock::updateAnchor(
		}
		mAnchorTimeRealUs = nowUs;
		mAnchorTimeMediaUs = nowMediaUs;

		++mGeneration;
		processTimers_l();
		}

		void MediaClock::updateMaxTimeMedia(int64_t maxTimeMediaUs) {
		@@ -105,6 +139,11 @@ void MediaClock::setPlaybackRate(float rate) {
		}
		mAnchorTimeRealUs = nowUs;
		mPlaybackRate = rate;

		if (rate > 0.0) {
		++mGeneration;
		processTimers_l();
		}
		}

		float MediaClock::getPlaybackRate() const {
		@@ -165,4 +204,64 @@ status_t MediaClock::getRealTimeFor(
		return OK;
		}

		void MediaClock::addTimer(const sp<AMessage> &notify, int64_t mediaTimeUs) {
		Mutex::Autolock autoLock(mLock);
		int64_t nextMediaTimeUs = INT64_MAX;
		if (!mTimers.empty()) {
		nextMediaTimeUs = mTimers.begin()->first;
		}

		mTimers.emplace(mediaTimeUs, notify);
		if (mediaTimeUs < nextMediaTimeUs) {
		++mGeneration;
		processTimers_l();
		}
		}

		void MediaClock::onMessageReceived(const sp<AMessage> &msg) {
		switch (msg->what()) {
		case kWhatTimeIsUp:
		{
		int32_t generation;
		CHECK(msg->findInt32("generation", &generation));

		Mutex::Autolock autoLock(mLock);
		if (generation != mGeneration) {
		break;
		}
		processTimers_l();
		break;
		}

		default:
		TRESPASS();
		break;
		}
		}

		void MediaClock::processTimers_l() {
		int64_t nowMediaTimeUs;
		status_t status = getMediaTime_l(
		ALooper::GetNowUs(), &nowMediaTimeUs, false /* allowPastMaxTime */);

		if (status != OK) {
		return;
		}

		auto it = mTimers.begin();
		while (it != mTimers.end() && it->first <= nowMediaTimeUs) {
		it->second->setInt32("reason", TIMER_REASON_REACHED);
		it->second->post();
		it = mTimers.erase(it);
		}

		if (it == mTimers.end() \|\| mPlaybackRate == 0.0 \|\| mAnchorTimeMediaUs < 0) {
		return;
		}

		sp<AMessage> msg = new AMessage(kWhatTimeIsUp, this);
		msg->setInt32("generation", mGeneration);
		msg->post((it->first - nowMediaTimeUs) / (double)mPlaybackRate);
		}

		} // namespace android

media/libstagefright/MediaSync.cpp

+1 −0

Original line number	Diff line number	Diff line
		@@ -61,6 +61,7 @@ MediaSync::MediaSync()
		mNextBufferItemMediaUs(-1),
		mPlaybackRate(0.0) {
		mMediaClock = new MediaClock;
		mMediaClock->init();

		// initialize settings
		mPlaybackSettings = AUDIO_PLAYBACK_RATE_DEFAULT;

media/libstagefright/include/media/stagefright/MediaClock.h

+26 −2

Original line number	Diff line number	Diff line
		@@ -18,7 +18,8 @@

		#define MEDIA_CLOCK_H_

		#include <media/stagefright/foundation/ABase.h>
		#include <map>
		#include <media/stagefright/foundation/AHandler.h>
		#include <utils/Mutex.h>
		#include <utils/RefBase.h>

		@@ -26,8 +27,15 @@ namespace android {

		struct AMessage;

		struct MediaClock : public RefBase {
		struct MediaClock : public AHandler {
		enum {
		TIMER_REASON_REACHED = 0,
		TIMER_REASON_NO_CLOCK = 1,
		TIMER_REASON_RESET = 2,
		};

		MediaClock();
		void init();

		void setStartingTimeMedia(int64_t startingTimeMediaUs);

		@@ -54,15 +62,28 @@ struct MediaClock : public RefBase {
		// The result is saved in \|outRealUs\|.
		status_t getRealTimeFor(int64_t targetMediaUs, int64_t *outRealUs) const;

		void addTimer(const sp<AMessage> &notify, int64_t mediaTimeUs);

		void reset();

		protected:
		virtual ~MediaClock();

		virtual void onMessageReceived(const sp<AMessage> &msg);

		private:
		enum {
		kWhatTimeIsUp = 'tIsU',
		};

		status_t getMediaTime_l(
		int64_t realUs,
		int64_t *outMediaUs,
		bool allowPastMaxTime) const;

		void processTimers_l();

		sp<ALooper> mLooper;
		mutable Mutex mLock;

		int64_t mAnchorTimeMediaUs;
		@@ -72,6 +93,9 @@ private:

		float mPlaybackRate;

		int32_t mGeneration;
		std::multimap<int64_t, sp<AMessage> > mTimers;

		DISALLOW_EVIL_CONSTRUCTORS(MediaClock);
		};