Merge changes I7459b9e9,I9bc5573e (a0037768) · Commits · e / os / android_frameworks_base

cmds/stagefright/Android.mk

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		LOCAL_PATH:= $(call my-dir)

		include $(CLEAR_VARS)

		LOCAL_SRC_FILES:= \
		stagefright.cpp \
		jpeg.cpp \
		SineSource.cpp

		LOCAL_SHARED_LIBRARIES := \
		libstagefright libmedia libmedia_native libutils libbinder libstagefright_foundation \
		libjpeg libgui

		LOCAL_C_INCLUDES:= \
		frameworks/base/media/libstagefright \
		frameworks/base/media/libstagefright/include \
		$(TOP)/frameworks/native/include/media/openmax \
		external/jpeg \

		LOCAL_CFLAGS += -Wno-multichar

		LOCAL_MODULE_TAGS := debug

		LOCAL_MODULE:= stagefright

		include $(BUILD_EXECUTABLE)

		################################################################################

		include $(CLEAR_VARS)

		LOCAL_SRC_FILES:= \
		SineSource.cpp \
		record.cpp

		LOCAL_SHARED_LIBRARIES := \
		libstagefright liblog libutils libbinder libstagefright_foundation

		LOCAL_C_INCLUDES:= \
		frameworks/base/media/libstagefright \
		$(TOP)/frameworks/native/include/media/openmax

		LOCAL_CFLAGS += -Wno-multichar

		LOCAL_MODULE_TAGS := debug

		LOCAL_MODULE:= record

		include $(BUILD_EXECUTABLE)

		################################################################################

		include $(CLEAR_VARS)

		LOCAL_SRC_FILES:= \
		SineSource.cpp \
		recordvideo.cpp

		LOCAL_SHARED_LIBRARIES := \
		libstagefright liblog libutils libbinder libstagefright_foundation

		LOCAL_C_INCLUDES:= \
		frameworks/base/media/libstagefright \
		$(TOP)/frameworks/native/include/media/openmax

		LOCAL_CFLAGS += -Wno-multichar

		LOCAL_MODULE_TAGS := debug

		LOCAL_MODULE:= recordvideo

		include $(BUILD_EXECUTABLE)


		################################################################################

		include $(CLEAR_VARS)

		LOCAL_SRC_FILES:= \
		SineSource.cpp \
		audioloop.cpp

		LOCAL_SHARED_LIBRARIES := \
		libstagefright liblog libutils libbinder libstagefright_foundation

		LOCAL_C_INCLUDES:= \
		frameworks/base/media/libstagefright \
		$(TOP)/frameworks/native/include/media/openmax

		LOCAL_CFLAGS += -Wno-multichar

		LOCAL_MODULE_TAGS := debug

		LOCAL_MODULE:= audioloop

		include $(BUILD_EXECUTABLE)

		################################################################################

		include $(CLEAR_VARS)

		LOCAL_SRC_FILES:= \
		stream.cpp \

		LOCAL_SHARED_LIBRARIES := \
		libstagefright liblog libutils libbinder libgui \
		libstagefright_foundation libmedia libmedia_native

		LOCAL_C_INCLUDES:= \
		frameworks/base/media/libstagefright \
		$(TOP)/frameworks/native/include/media/openmax

		LOCAL_CFLAGS += -Wno-multichar

		LOCAL_MODULE_TAGS := debug

		LOCAL_MODULE:= stream

		include $(BUILD_EXECUTABLE)

		################################################################################

		include $(CLEAR_VARS)

		LOCAL_SRC_FILES:= \
		sf2.cpp \

		LOCAL_SHARED_LIBRARIES := \
		libstagefright liblog libutils libbinder libstagefright_foundation \
		libmedia libmedia_native libgui libcutils libui

		LOCAL_C_INCLUDES:= \
		frameworks/base/media/libstagefright \
		$(TOP)/frameworks/native/include/media/openmax

		LOCAL_CFLAGS += -Wno-multichar

		LOCAL_MODULE_TAGS := debug

		LOCAL_MODULE:= sf2

		include $(BUILD_EXECUTABLE)

		################################################################################

		include $(CLEAR_VARS)

		LOCAL_SRC_FILES:= \
		codec.cpp \
		SimplePlayer.cpp \

		LOCAL_SHARED_LIBRARIES := \
		libstagefright liblog libutils libbinder libstagefright_foundation \
		libmedia libmedia_native libgui libcutils libui

		LOCAL_C_INCLUDES:= \
		frameworks/base/media/libstagefright \
		$(TOP)/frameworks/native/include/media/openmax

		LOCAL_CFLAGS += -Wno-multichar

		LOCAL_MODULE_TAGS := debug

		LOCAL_MODULE:= codec

		include $(BUILD_EXECUTABLE)

cmds/stagefright/SimplePlayer.cpp

deleted100644 → 0

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Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2012 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		//#define LOG_NDEBUG 0
		#define LOG_TAG "SimplePlayer"
		#include <utils/Log.h>

		#include "SimplePlayer.h"

		#include <gui/SurfaceTextureClient.h>
		#include <media/AudioTrack.h>
		#include <media/stagefright/foundation/ABuffer.h>
		#include <media/stagefright/foundation/ADebug.h>
		#include <media/stagefright/foundation/AMessage.h>
		#include <media/stagefright/MediaCodec.h>
		#include <media/stagefright/MediaErrors.h>
		#include <media/stagefright/NativeWindowWrapper.h>
		#include <media/stagefright/NuMediaExtractor.h>

		namespace android {

		SimplePlayer::SimplePlayer()
		: mState(UNINITIALIZED),
		mDoMoreStuffGeneration(0),
		mStartTimeRealUs(-1ll) {
		}

		SimplePlayer::~SimplePlayer() {
		}

		// static
		status_t PostAndAwaitResponse(
		const sp<AMessage> &msg, sp<AMessage> *response) {
		status_t err = msg->postAndAwaitResponse(response);

		if (err != OK) {
		return err;
		}

		if (!(*response)->findInt32("err", &err)) {
		err = OK;
		}

		return err;
		}
		status_t SimplePlayer::setDataSource(const char *path) {
		sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());
		msg->setString("path", path);
		sp<AMessage> response;
		return PostAndAwaitResponse(msg, &response);
		}

		status_t SimplePlayer::setSurface(const sp<ISurfaceTexture> &surfaceTexture) {
		sp<AMessage> msg = new AMessage(kWhatSetSurface, id());

		sp<SurfaceTextureClient> surfaceTextureClient;
		if (surfaceTexture != NULL) {
		surfaceTextureClient = new SurfaceTextureClient(surfaceTexture);
		}

		msg->setObject(
		"native-window", new NativeWindowWrapper(surfaceTextureClient));

		sp<AMessage> response;
		return PostAndAwaitResponse(msg, &response);
		}

		status_t SimplePlayer::prepare() {
		sp<AMessage> msg = new AMessage(kWhatPrepare, id());
		sp<AMessage> response;
		return PostAndAwaitResponse(msg, &response);
		}

		status_t SimplePlayer::start() {
		sp<AMessage> msg = new AMessage(kWhatStart, id());
		sp<AMessage> response;
		return PostAndAwaitResponse(msg, &response);
		}

		status_t SimplePlayer::stop() {
		sp<AMessage> msg = new AMessage(kWhatStop, id());
		sp<AMessage> response;
		return PostAndAwaitResponse(msg, &response);
		}

		status_t SimplePlayer::reset() {
		sp<AMessage> msg = new AMessage(kWhatReset, id());
		sp<AMessage> response;
		return PostAndAwaitResponse(msg, &response);
		}

		void SimplePlayer::onMessageReceived(const sp<AMessage> &msg) {
		switch (msg->what()) {
		case kWhatSetDataSource:
		{
		status_t err;
		if (mState != UNINITIALIZED) {
		err = INVALID_OPERATION;
		} else {
		CHECK(msg->findString("path", &mPath));
		mState = UNPREPARED;
		}

		uint32_t replyID;
		CHECK(msg->senderAwaitsResponse(&replyID));

		sp<AMessage> response = new AMessage;
		response->setInt32("err", err);
		response->postReply(replyID);
		break;
		}

		case kWhatSetSurface:
		{
		status_t err;
		if (mState != UNPREPARED) {
		err = INVALID_OPERATION;
		} else {
		sp<RefBase> obj;
		CHECK(msg->findObject("native-window", &obj));

		mNativeWindow = static_cast<NativeWindowWrapper *>(obj.get());

		err = OK;
		}

		uint32_t replyID;
		CHECK(msg->senderAwaitsResponse(&replyID));

		sp<AMessage> response = new AMessage;
		response->setInt32("err", err);
		response->postReply(replyID);
		break;
		}

		case kWhatPrepare:
		{
		status_t err;
		if (mState != UNPREPARED) {
		err = INVALID_OPERATION;
		} else {
		err = onPrepare();

		if (err == OK) {
		mState = STOPPED;
		}
		}

		uint32_t replyID;
		CHECK(msg->senderAwaitsResponse(&replyID));

		sp<AMessage> response = new AMessage;
		response->setInt32("err", err);
		response->postReply(replyID);
		break;
		}

		case kWhatStart:
		{
		status_t err = OK;

		if (mState == UNPREPARED) {
		err = onPrepare();

		if (err == OK) {
		mState = STOPPED;
		}
		}

		if (err == OK) {
		if (mState != STOPPED) {
		err = INVALID_OPERATION;
		} else {
		err = onStart();

		if (err == OK) {
		mState = STARTED;
		}
		}
		}

		uint32_t replyID;
		CHECK(msg->senderAwaitsResponse(&replyID));

		sp<AMessage> response = new AMessage;
		response->setInt32("err", err);
		response->postReply(replyID);
		break;
		}

		case kWhatStop:
		{
		status_t err;

		if (mState != STARTED) {
		err = INVALID_OPERATION;
		} else {
		err = onStop();

		if (err == OK) {
		mState = STOPPED;
		}
		}

		uint32_t replyID;
		CHECK(msg->senderAwaitsResponse(&replyID));

		sp<AMessage> response = new AMessage;
		response->setInt32("err", err);
		response->postReply(replyID);
		break;
		}

		case kWhatReset:
		{
		status_t err = OK;

		if (mState == STARTED) {
		CHECK_EQ(onStop(), (status_t)OK);
		mState = STOPPED;
		}

		if (mState == STOPPED) {
		err = onReset();
		mState = UNINITIALIZED;
		}

		uint32_t replyID;
		CHECK(msg->senderAwaitsResponse(&replyID));

		sp<AMessage> response = new AMessage;
		response->setInt32("err", err);
		response->postReply(replyID);
		break;
		}

		case kWhatDoMoreStuff:
		{
		int32_t generation;
		CHECK(msg->findInt32("generation", &generation));

		if (generation != mDoMoreStuffGeneration) {
		break;
		}

		status_t err = onDoMoreStuff();

		if (err == OK) {
		msg->post(10000ll);
		}
		break;
		}

		default:
		TRESPASS();
		}
		}

		status_t SimplePlayer::onPrepare() {
		CHECK_EQ(mState, UNPREPARED);

		mExtractor = new NuMediaExtractor;

		status_t err = mExtractor->setDataSource(mPath.c_str());

		if (err != OK) {
		mExtractor.clear();
		return err;
		}

		if (mCodecLooper == NULL) {
		mCodecLooper = new ALooper;
		mCodecLooper->start();
		}

		bool haveAudio = false;
		bool haveVideo = false;
		for (size_t i = 0; i < mExtractor->countTracks(); ++i) {
		sp<AMessage> format;
		status_t err = mExtractor->getTrackFormat(i, &format);
		CHECK_EQ(err, (status_t)OK);

		AString mime;
		CHECK(format->findString("mime", &mime));

		if (!haveAudio && !strncasecmp(mime.c_str(), "audio/", 6)) {
		haveAudio = true;
		} else if (!haveVideo && !strncasecmp(mime.c_str(), "video/", 6)) {
		haveVideo = true;
		} else {
		continue;
		}

		err = mExtractor->selectTrack(i);
		CHECK_EQ(err, (status_t)OK);

		CodecState *state =
		&mStateByTrackIndex.editValueAt(
		mStateByTrackIndex.add(i, CodecState()));

		state->mNumFramesWritten = 0;
		state->mCodec = MediaCodec::CreateByType(
		mCodecLooper, mime.c_str(), false /* encoder */);

		CHECK(state->mCodec != NULL);

		err = state->mCodec->configure(
		format, mNativeWindow->getSurfaceTextureClient(),
		0 /* flags */);

		CHECK_EQ(err, (status_t)OK);

		size_t j = 0;
		sp<ABuffer> buffer;
		while (format->findBuffer(StringPrintf("csd-%d", j).c_str(), &buffer)) {
		state->mCSD.push_back(buffer);

		++j;
		}
		}

		for (size_t i = 0; i < mStateByTrackIndex.size(); ++i) {
		CodecState *state = &mStateByTrackIndex.editValueAt(i);

		status_t err = state->mCodec->start();
		CHECK_EQ(err, (status_t)OK);

		err = state->mCodec->getInputBuffers(&state->mBuffers[0]);
		CHECK_EQ(err, (status_t)OK);

		err = state->mCodec->getOutputBuffers(&state->mBuffers[1]);
		CHECK_EQ(err, (status_t)OK);

		for (size_t j = 0; j < state->mCSD.size(); ++j) {
		const sp<ABuffer> &srcBuffer = state->mCSD.itemAt(j);

		size_t index;
		err = state->mCodec->dequeueInputBuffer(&index, -1ll);
		CHECK_EQ(err, (status_t)OK);

		const sp<ABuffer> &dstBuffer = state->mBuffers[0].itemAt(index);

		CHECK_LE(srcBuffer->size(), dstBuffer->capacity());
		dstBuffer->setRange(0, srcBuffer->size());
		memcpy(dstBuffer->data(), srcBuffer->data(), srcBuffer->size());

		err = state->mCodec->queueInputBuffer(
		index,
		0,
		dstBuffer->size(),
		0ll,
		MediaCodec::BUFFER_FLAG_CODECCONFIG);
		CHECK_EQ(err, (status_t)OK);
		}
		}

		return OK;
		}

		status_t SimplePlayer::onStart() {
		CHECK_EQ(mState, STOPPED);

		mStartTimeRealUs = -1ll;

		sp<AMessage> msg = new AMessage(kWhatDoMoreStuff, id());
		msg->setInt32("generation", ++mDoMoreStuffGeneration);
		msg->post();

		return OK;
		}

		status_t SimplePlayer::onStop() {
		CHECK_EQ(mState, STARTED);

		++mDoMoreStuffGeneration;

		return OK;
		}

		status_t SimplePlayer::onReset() {
		CHECK_EQ(mState, STOPPED);

		for (size_t i = 0; i < mStateByTrackIndex.size(); ++i) {
		CodecState *state = &mStateByTrackIndex.editValueAt(i);

		CHECK_EQ(state->mCodec->release(), (status_t)OK);
		}

		mStartTimeRealUs = -1ll;

		mStateByTrackIndex.clear();
		mCodecLooper.clear();
		mExtractor.clear();
		mNativeWindow.clear();
		mPath.clear();

		return OK;
		}

		status_t SimplePlayer::onDoMoreStuff() {
		ALOGV("onDoMoreStuff");
		for (size_t i = 0; i < mStateByTrackIndex.size(); ++i) {
		CodecState *state = &mStateByTrackIndex.editValueAt(i);

		status_t err;
		do {
		size_t index;
		err = state->mCodec->dequeueInputBuffer(&index);

		if (err == OK) {
		ALOGV("dequeued input buffer on track %d",
		mStateByTrackIndex.keyAt(i));

		state->mAvailInputBufferIndices.push_back(index);
		} else {
		ALOGV("dequeueInputBuffer on track %d returned %d",
		mStateByTrackIndex.keyAt(i), err);
		}
		} while (err == OK);

		do {
		BufferInfo info;
		err = state->mCodec->dequeueOutputBuffer(
		&info.mIndex,
		&info.mOffset,
		&info.mSize,
		&info.mPresentationTimeUs,
		&info.mFlags);

		if (err == OK) {
		ALOGV("dequeued output buffer on track %d",
		mStateByTrackIndex.keyAt(i));

		state->mAvailOutputBufferInfos.push_back(info);
		} else if (err == INFO_FORMAT_CHANGED) {
		err = onOutputFormatChanged(mStateByTrackIndex.keyAt(i), state);
		CHECK_EQ(err, (status_t)OK);
		} else if (err == INFO_OUTPUT_BUFFERS_CHANGED) {
		err = state->mCodec->getOutputBuffers(&state->mBuffers[1]);
		CHECK_EQ(err, (status_t)OK);
		} else {
		ALOGV("dequeueOutputBuffer on track %d returned %d",
		mStateByTrackIndex.keyAt(i), err);
		}
		} while (err == OK
		\|\| err == INFO_FORMAT_CHANGED
		\|\| err == INFO_OUTPUT_BUFFERS_CHANGED);
		}

		for (;;) {
		size_t trackIndex;
		status_t err = mExtractor->getSampleTrackIndex(&trackIndex);

		if (err != OK) {
		ALOGI("encountered input EOS.");
		break;
		} else {
		CodecState *state = &mStateByTrackIndex.editValueFor(trackIndex);

		if (state->mAvailInputBufferIndices.empty()) {
		break;
		}

		size_t index = *state->mAvailInputBufferIndices.begin();
		state->mAvailInputBufferIndices.erase(
		state->mAvailInputBufferIndices.begin());

		const sp<ABuffer> &dstBuffer =
		state->mBuffers[0].itemAt(index);

		err = mExtractor->readSampleData(dstBuffer);
		CHECK_EQ(err, (status_t)OK);

		int64_t timeUs;
		CHECK_EQ(mExtractor->getSampleTime(&timeUs), (status_t)OK);

		err = state->mCodec->queueInputBuffer(
		index,
		dstBuffer->offset(),
		dstBuffer->size(),
		timeUs,
		0);
		CHECK_EQ(err, (status_t)OK);

		ALOGV("enqueued input data on track %d", trackIndex);

		err = mExtractor->advance();
		CHECK_EQ(err, (status_t)OK);
		}
		}

		int64_t nowUs = ALooper::GetNowUs();

		if (mStartTimeRealUs < 0ll) {
		mStartTimeRealUs = nowUs + 1000000ll;
		}

		for (size_t i = 0; i < mStateByTrackIndex.size(); ++i) {
		CodecState *state = &mStateByTrackIndex.editValueAt(i);

		while (!state->mAvailOutputBufferInfos.empty()) {
		BufferInfo info = &state->mAvailOutputBufferInfos.begin();

		int64_t whenRealUs = info->mPresentationTimeUs + mStartTimeRealUs;
		int64_t lateByUs = nowUs - whenRealUs;

		if (lateByUs > -10000ll) {
		bool release = true;

		if (lateByUs > 30000ll) {
		ALOGI("track %d buffer late by %lld us, dropping.",
		mStateByTrackIndex.keyAt(i), lateByUs);
		state->mCodec->releaseOutputBuffer(info->mIndex);
		} else {
		if (state->mAudioTrack != NULL) {
		const sp<ABuffer> &srcBuffer =
		state->mBuffers[1].itemAt(info->mIndex);

		renderAudio(state, info, srcBuffer);

		if (info->mSize > 0) {
		release = false;
		}
		}

		if (release) {
		state->mCodec->renderOutputBufferAndRelease(
		info->mIndex);
		}
		}

		if (release) {
		state->mAvailOutputBufferInfos.erase(
		state->mAvailOutputBufferInfos.begin());

		info = NULL;
		} else {
		break;
		}
		} else {
		ALOGV("track %d buffer early by %lld us.",
		mStateByTrackIndex.keyAt(i), -lateByUs);
		break;
		}
		}
		}

		return OK;
		}

		status_t SimplePlayer::onOutputFormatChanged(
		size_t trackIndex, CodecState *state) {
		sp<AMessage> format;
		status_t err = state->mCodec->getOutputFormat(&format);

		if (err != OK) {
		return err;
		}

		AString mime;
		CHECK(format->findString("mime", &mime));

		if (!strncasecmp(mime.c_str(), "audio/", 6)) {
		int32_t channelCount;
		int32_t sampleRate;
		CHECK(format->findInt32("channel-count", &channelCount));
		CHECK(format->findInt32("sample-rate", &sampleRate));

		state->mAudioTrack = new AudioTrack(
		AUDIO_STREAM_MUSIC,
		sampleRate,
		AUDIO_FORMAT_PCM_16_BIT,
		audio_channel_out_mask_from_count(channelCount),
		0);

		state->mNumFramesWritten = 0;
		}

		return OK;
		}

		void SimplePlayer::renderAudio(
		CodecState state, BufferInfo info, const sp<ABuffer> &buffer) {
		CHECK(state->mAudioTrack != NULL);

		if (state->mAudioTrack->stopped()) {
		state->mAudioTrack->start();
		}

		uint32_t numFramesPlayed;
		CHECK_EQ(state->mAudioTrack->getPosition(&numFramesPlayed), (status_t)OK);

		uint32_t numFramesAvailableToWrite =
		state->mAudioTrack->frameCount()
		- (state->mNumFramesWritten - numFramesPlayed);

		size_t numBytesAvailableToWrite =
		numFramesAvailableToWrite * state->mAudioTrack->frameSize();

		size_t copy = info->mSize;
		if (copy > numBytesAvailableToWrite) {
		copy = numBytesAvailableToWrite;
		}

		if (copy == 0) {
		return;
		}

		int64_t startTimeUs = ALooper::GetNowUs();

		ssize_t nbytes = state->mAudioTrack->write(
		buffer->base() + info->mOffset, copy);

		CHECK_EQ(nbytes, (ssize_t)copy);

		int64_t delayUs = ALooper::GetNowUs() - startTimeUs;

		uint32_t numFramesWritten = nbytes / state->mAudioTrack->frameSize();

		if (delayUs > 2000ll) {
		ALOGW("AudioTrack::write took %lld us, numFramesAvailableToWrite=%u, "
		"numFramesWritten=%u",
		delayUs, numFramesAvailableToWrite, numFramesWritten);
		}

		info->mOffset += nbytes;
		info->mSize -= nbytes;

		state->mNumFramesWritten += numFramesWritten;
		}

		} // namespace android

cmds/stagefright/SimplePlayer.h

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+0 −109

File deleted.

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cmds/stagefright/SineSource.cpp

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Original line number	Diff line number	Diff line
		#include "SineSource.h"

		#include <math.h>

		#include <media/stagefright/MediaBufferGroup.h>
		#include <media/stagefright/foundation/ADebug.h>
		#include <media/stagefright/MediaDefs.h>
		#include <media/stagefright/MetaData.h>

		namespace android {

		SineSource::SineSource(int32_t sampleRate, int32_t numChannels)
		: mStarted(false),
		mSampleRate(sampleRate),
		mNumChannels(numChannels),
		mPhase(0),
		mGroup(NULL) {
		CHECK(numChannels == 1 \|\| numChannels == 2);
		}

		SineSource::~SineSource() {
		if (mStarted) {
		stop();
		}
		}

		status_t SineSource::start(MetaData *params) {
		CHECK(!mStarted);

		mGroup = new MediaBufferGroup;
		mGroup->add_buffer(new MediaBuffer(kBufferSize));

		mPhase = 0;
		mStarted = true;

		return OK;
		}

		status_t SineSource::stop() {
		CHECK(mStarted);

		delete mGroup;
		mGroup = NULL;

		mStarted = false;

		return OK;
		}

		sp<MetaData> SineSource::getFormat() {
		sp<MetaData> meta = new MetaData;
		meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_RAW);
		meta->setInt32(kKeyChannelCount, mNumChannels);
		meta->setInt32(kKeySampleRate, mSampleRate);
		meta->setInt32(kKeyMaxInputSize, kBufferSize);

		return meta;
		}

		status_t SineSource::read(
		MediaBuffer *out, const ReadOptions options) {
		*out = NULL;

		MediaBuffer *buffer;
		status_t err = mGroup->acquire_buffer(&buffer);

		if (err != OK) {
		return err;
		}

		size_t frameSize = mNumChannels * sizeof(int16_t);
		size_t numFramesPerBuffer = buffer->size() / frameSize;

		int16_t ptr = (int16_t )buffer->data();

		const double k = kFrequency / mSampleRate * (2.0 * M_PI);

		double x = mPhase * k;
		for (size_t i = 0; i < numFramesPerBuffer; ++i) {
		int16_t amplitude = (int16_t)(32767.0 * sin(x));

		*ptr++ = amplitude;
		if (mNumChannels == 2) {
		*ptr++ = amplitude;
		}

		x += k;
		}

		buffer->meta_data()->setInt64(
		kKeyTime, ((int64_t)mPhase * 1000000) / mSampleRate);

		mPhase += numFramesPerBuffer;

		buffer->set_range(0, numFramesPerBuffer * frameSize);

		*out = buffer;

		return OK;
		}

		} // namespace android

cmds/stagefright/SineSource.h

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