BufferingSettings: hook up internal BufferingSettings API. (48fa06d1) · Commits · e / os / android_frameworks_av

include/media/BufferingSettings.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -40,6 +40,8 @@ struct BufferingSettings : public Parcelable {
		static const int kNoWatermark = -1;

		static bool IsValidBufferingMode(int mode);
		static bool IsTimeBasedBufferingMode(int mode);
		static bool IsSizeBasedBufferingMode(int mode);

		BufferingMode mInitialBufferingMode; // for prepare
		BufferingMode mRebufferingMode; // for playback

include/media/stagefright/Utils.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,7 @@
		#include <utils/Errors.h>
		#include <utils/RefBase.h>
		#include <system/audio.h>
		#include <media/BufferingSettings.h>
		#include <media/MediaPlayerInterface.h>

		namespace android {
		@@ -90,6 +91,9 @@ void writeToAMessage(const sp<AMessage> &msg, const AVSyncSettings &sync, float
		void readFromAMessage(
		const sp<AMessage> &msg, AVSyncSettings sync / nonnull /, float videoFps /* nonnull */);

		void writeToAMessage(const sp<AMessage> &msg, const BufferingSettings &buffering);
		void readFromAMessage(const sp<AMessage> &msg, BufferingSettings buffering / nonnull */);

		AString nameForFd(int fd);

		} // namespace android

media/libmedia/BufferingSettings.cpp

+10 −0

Original line number	Diff line number	Diff line
		@@ -28,6 +28,16 @@ bool BufferingSettings::IsValidBufferingMode(int mode) {
		return (mode >= BUFFERING_MODE_NONE && mode < BUFFERING_MODE_COUNT);
		}

		// static
		bool BufferingSettings::IsTimeBasedBufferingMode(int mode) {
		return (mode == BUFFERING_MODE_TIME_ONLY \|\| mode == BUFFERING_MODE_TIME_THEN_SIZE);
		}

		// static
		bool BufferingSettings::IsSizeBasedBufferingMode(int mode) {
		return (mode == BUFFERING_MODE_SIZE_ONLY \|\| mode == BUFFERING_MODE_TIME_THEN_SIZE);
		}

		BufferingSettings::BufferingSettings()
		: mInitialBufferingMode(BUFFERING_MODE_NONE),
		mRebufferingMode(BUFFERING_MODE_NONE),

media/libmediaplayerservice/nuplayer/GenericSource.cpp

+81 −27

Original line number	Diff line number	Diff line
		@@ -38,11 +38,12 @@

		namespace android {

		static int64_t kLowWaterMarkUs = 2000000ll; // 2secs
		static int64_t kHighWaterMarkUs = 5000000ll; // 5secs
		static int64_t kHighWaterMarkRebufferUs = 15000000ll; // 15secs
		static const ssize_t kLowWaterMarkBytes = 40000;
		static const ssize_t kHighWaterMarkBytes = 200000;
		static const int kLowWaterMarkMs = 2000; // 2secs
		static const int kHighWaterMarkMs = 5000; // 5secs
		static const int kHighWaterMarkRebufferMs = 15000; // 15secs

		static const int kLowWaterMarkKB = 40;
		static const int kHighWaterMarkKB = 200;

		NuPlayer::GenericSource::GenericSource(
		const sp<AMessage> &notify,
		@@ -241,6 +242,16 @@ status_t NuPlayer::GenericSource::initFromDataSource() {
		return OK;
		}

		status_t NuPlayer::GenericSource::getDefaultBufferingSettings(
		BufferingSettings* buffering /* nonnull */) {
		mBufferingMonitor->getDefaultBufferingSettings(buffering);
		return OK;
		}

		status_t NuPlayer::GenericSource::setBufferingSettings(const BufferingSettings& buffering) {
		return mBufferingMonitor->setBufferingSettings(buffering);
		}

		status_t NuPlayer::GenericSource::startSources() {
		// Start the selected A/V tracks now before we start buffering.
		// Widevine sources might re-initialize crypto when starting, if we delay
		@@ -1451,11 +1462,48 @@ NuPlayer::GenericSource::BufferingMonitor::BufferingMonitor(const sp<AMessage> &
		mFirstDequeuedBufferRealUs(-1ll),
		mFirstDequeuedBufferMediaUs(-1ll),
		mlastDequeuedBufferMediaUs(-1ll) {
		getDefaultBufferingSettings(&mSettings);
		}

		NuPlayer::GenericSource::BufferingMonitor::~BufferingMonitor() {
		}

		void NuPlayer::GenericSource::BufferingMonitor::getDefaultBufferingSettings(
		BufferingSettings buffering / nonnull */) {
		buffering->mInitialBufferingMode = BUFFERING_MODE_TIME_ONLY;
		buffering->mRebufferingMode = BUFFERING_MODE_TIME_THEN_SIZE;
		buffering->mInitialWatermarkMs = kHighWaterMarkMs;
		buffering->mRebufferingWatermarkLowMs = kLowWaterMarkMs;
		buffering->mRebufferingWatermarkHighMs = kHighWaterMarkRebufferMs;
		buffering->mRebufferingWatermarkLowKB = kLowWaterMarkKB;
		buffering->mRebufferingWatermarkHighKB = kHighWaterMarkKB;
		}

		status_t NuPlayer::GenericSource::BufferingMonitor::setBufferingSettings(
		const BufferingSettings &buffering) {
		Mutex::Autolock _l(mLock);
		if (buffering.IsSizeBasedBufferingMode(buffering.mInitialBufferingMode)
		\|\| (buffering.IsTimeBasedBufferingMode(buffering.mRebufferingMode)
		&& buffering.mRebufferingWatermarkLowMs > buffering.mRebufferingWatermarkHighMs)
		\|\| (buffering.IsSizeBasedBufferingMode(buffering.mRebufferingMode)
		&& buffering.mRebufferingWatermarkLowKB > buffering.mRebufferingWatermarkHighKB)) {
		return BAD_VALUE;
		}
		mSettings = buffering;
		if (mSettings.mInitialBufferingMode == BUFFERING_MODE_NONE) {
		mSettings.mInitialWatermarkMs = BufferingSettings::kNoWatermark;
		}
		if (!mSettings.IsTimeBasedBufferingMode(mSettings.mRebufferingMode)) {
		mSettings.mRebufferingWatermarkLowMs = BufferingSettings::kNoWatermark;
		mSettings.mRebufferingWatermarkHighMs = INT32_MAX;
		}
		if (!mSettings.IsSizeBasedBufferingMode(mSettings.mRebufferingMode)) {
		mSettings.mRebufferingWatermarkLowKB = BufferingSettings::kNoWatermark;
		mSettings.mRebufferingWatermarkHighKB = INT32_MAX;
		}
		return OK;
		}

		void NuPlayer::GenericSource::BufferingMonitor::prepare(
		const sp<NuCachedSource2> &cachedSource,
		int64_t durationUs,
		@@ -1684,7 +1732,9 @@ void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {

		stopBufferingIfNecessary_l();
		return;
		} else if (cachedDurationUs >= 0ll) {
		}

		if (cachedDurationUs >= 0ll) {
		if (mDurationUs > 0ll) {
		int64_t cachedPosUs = getLastReadPosition_l() + cachedDurationUs;
		int percentage = 100.0 * cachedPosUs / mDurationUs;
		@@ -1695,36 +1745,40 @@ void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {
		notifyBufferingUpdate_l(percentage);
		}

		ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec",
		cachedDurationUs / 1000000.0f);
		ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec", cachedDurationUs / 1000000.0f);

		if (cachedDurationUs < kLowWaterMarkUs) {
		if (mPrepareBuffering) {
		if (cachedDurationUs > mSettings.mInitialWatermarkMs * 1000) {
		stopBufferingIfNecessary_l();
		}
		} else if (mSettings.IsTimeBasedBufferingMode(mSettings.mRebufferingMode)) {
		if (cachedDurationUs < mSettings.mRebufferingWatermarkLowMs * 1000) {
		// Take into account the data cached in downstream components to try to avoid
		// unnecessary pause.
		if (mOffloadAudio && mFirstDequeuedBufferRealUs >= 0) {
		int64_t downStreamCacheUs = mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
		int64_t downStreamCacheUs =
		mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
		- (ALooper::GetNowUs() - mFirstDequeuedBufferRealUs);
		if (downStreamCacheUs > 0) {
		cachedDurationUs += downStreamCacheUs;
		}
		}

		if (cachedDurationUs < kLowWaterMarkUs) {
		if (cachedDurationUs < mSettings.mRebufferingWatermarkLowMs * 1000) {
		startBufferingIfNecessary_l();
		}
		} else {
		int64_t highWaterMark = mPrepareBuffering ? kHighWaterMarkUs : kHighWaterMarkRebufferUs;
		if (cachedDurationUs > highWaterMark) {
		} else if (cachedDurationUs > mSettings.mRebufferingWatermarkHighMs * 1000) {
		stopBufferingIfNecessary_l();
		}
		}
		} else if (cachedDataRemaining >= 0) {
		} else if (cachedDataRemaining >= 0
		&& mSettings.IsSizeBasedBufferingMode(mSettings.mRebufferingMode)) {
		ALOGV("onPollBuffering_l: cachedDataRemaining %zd bytes",
		cachedDataRemaining);

		if (cachedDataRemaining < kLowWaterMarkBytes) {
		if (cachedDataRemaining < (mSettings.mRebufferingWatermarkLowKB << 10)) {
		startBufferingIfNecessary_l();
		} else if (cachedDataRemaining > kHighWaterMarkBytes) {
		} else if (cachedDataRemaining > (mSettings.mRebufferingWatermarkHighKB << 10)) {
		stopBufferingIfNecessary_l();
		}
		}

media/libmediaplayerservice/nuplayer/GenericSource.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -50,6 +50,10 @@ struct NuPlayer::GenericSource : public NuPlayer::Source {

		status_t setDataSource(const sp<DataSource>& dataSource);

		virtual status_t getDefaultBufferingSettings(
		BufferingSettings* buffering /* nonnull */) override;
		virtual status_t setBufferingSettings(const BufferingSettings& buffering) override;

		virtual void prepareAsync();

		virtual void start();
		@@ -119,6 +123,9 @@ private:
		public:
		explicit BufferingMonitor(const sp<AMessage> &notify);

		void getDefaultBufferingSettings(BufferingSettings buffering / nonnull */);
		status_t setBufferingSettings(const BufferingSettings &buffering);

		// Set up state.
		void prepare(const sp<NuCachedSource2> &cachedSource,
		int64_t durationUs,
		@@ -167,6 +174,7 @@ private:

		mutable Mutex mLock;

		BufferingSettings mSettings;
		bool mOffloadAudio;
		int64_t mFirstDequeuedBufferRealUs;
		int64_t mFirstDequeuedBufferMediaUs;