Merge "Enable silence detection and don't driver the audio encoder" into jb-mr1-dev (47aa9c47) · Commits · e / os / android_frameworks_av

media/libstagefright/wifi-display/source/Converter.cpp

+68 −12

Original line number	Diff line number	Diff line
		@@ -44,7 +44,12 @@ Converter::Converter(
		mCodecLooper(codecLooper),
		mInputFormat(format),
		mIsVideo(false),
		mDoMoreWorkPending(false) {
		mDoMoreWorkPending(false)
		#if ENABLE_SILENCE_DETECTION
		,mFirstSilentFrameUs(-1ll)
		,mInSilentMode(false)
		#endif
		{
		AString mime;
		CHECK(mInputFormat->findString("mime", &mime));

		@@ -171,6 +176,20 @@ void Converter::notifyError(status_t err) {
		notify->post();
		}

		// static
		bool Converter::IsSilence(const sp<ABuffer> &accessUnit) {
		const uint8_t *ptr = accessUnit->data();
		const uint8_t *end = ptr + accessUnit->size();
		while (ptr < end) {
		if (*ptr != 0) {
		return false;
		}
		++ptr;
		}

		return true;
		}

		void Converter::onMessageReceived(const sp<AMessage> &msg) {
		switch (msg->what()) {
		case kWhatMediaPullerNotify:
		@@ -220,6 +239,30 @@ void Converter::onMessageReceived(const sp<AMessage> &msg) {
		}
		#endif

		#if ENABLE_SILENCE_DETECTION
		if (!mIsVideo) {
		if (IsSilence(accessUnit)) {
		if (!mInSilentMode) {
		int64_t nowUs = ALooper::GetNowUs();

		if (mFirstSilentFrameUs < 0ll) {
		mFirstSilentFrameUs = nowUs;
		} else if (nowUs >= mFirstSilentFrameUs + 1000000ll) {
		mInSilentMode = true;
		ALOGI("audio in silent mode now.");
		break;
		}
		}
		} else {
		if (mInSilentMode) {
		ALOGI("audio no longer in silent mode.");
		}
		mInSilentMode = false;
		mFirstSilentFrameUs = -1ll;
		}
		}
		#endif

		mInputBufferQueue.push_back(accessUnit);

		feedEncoderInputBuffers();
		@@ -283,7 +326,7 @@ void Converter::scheduleDoMoreWork() {
		}

		mDoMoreWorkPending = true;
		(new AMessage(kWhatDoMoreWork, id()))->post(10000ll);
		(new AMessage(kWhatDoMoreWork, id()))->post(mIsVideo ? 10000ll : 5000ll);
		}

		status_t Converter::feedEncoderInputBuffers() {
		@@ -338,6 +381,7 @@ status_t Converter::doMoreWork() {
		feedEncoderInputBuffers();
		}

		for (;;) {
		size_t offset;
		size_t size;
		int64_t timeUs;
		@@ -345,7 +389,13 @@ status_t Converter::doMoreWork() {
		err = mEncoder->dequeueOutputBuffer(
		&bufferIndex, &offset, &size, &timeUs, &flags);

		if (err == OK) {
		if (err != OK) {
		if (err == -EAGAIN) {
		err = OK;
		}
		break;
		}

		if (flags & MediaCodec::BUFFER_FLAG_EOS) {
		sp<AMessage> notify = mNotify->dup();
		notify->setInt32("what", kWhatEOS);
		@@ -354,6 +404,10 @@ status_t Converter::doMoreWork() {
		sp<ABuffer> buffer = new ABuffer(size);
		buffer->meta()->setInt64("timeUs", timeUs);

		if (!mIsVideo) {
		ALOGV("audio time %lld us (%.2f secs)", timeUs, timeUs / 1E6);
		}

		memcpy(buffer->data(),
		mEncoderOutputBuffers.itemAt(bufferIndex)->base() + offset,
		size);
		@@ -368,9 +422,11 @@ status_t Converter::doMoreWork() {
		}
		}

		err = mEncoder->releaseOutputBuffer(bufferIndex);
		} else if (err == -EAGAIN) {
		err = OK;
		mEncoder->releaseOutputBuffer(bufferIndex);

		if (flags & MediaCodec::BUFFER_FLAG_EOS) {
		break;
		}
		}

		return err;

media/libstagefright/wifi-display/source/Converter.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,8 @@ namespace android {
		struct ABuffer;
		struct MediaCodec;

		#define ENABLE_SILENCE_DETECTION 1

		// Utility class that receives media access units and converts them into
		// media access unit of a different format.
		// Right now this'll convert raw video into H.264 and raw audio into AAC.
		@@ -83,6 +85,11 @@ private:

		bool mDoMoreWorkPending;

		#if ENABLE_SILENCE_DETECTION
		int64_t mFirstSilentFrameUs;
		bool mInSilentMode;
		#endif

		status_t initEncoder();

		status_t feedEncoderInputBuffers();
		@@ -92,6 +99,8 @@ private:

		void notifyError(status_t err);

		static bool IsSilence(const sp<ABuffer> &accessUnit);

		DISALLOW_EVIL_CONSTRUCTORS(Converter);
		};