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/*
* Copyright (C) 2007 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 "SoundPool"
#include <utils/Log.h>
//#define USE_SHARED_MEM_BUFFER
// XXX needed for timing latency
#include <utils/Timers.h>
#include <sys/resource.h>
#include <media/AudioTrack.h>
#include <media/mediaplayer.h>
#include "SoundPool.h"
#include "SoundPoolThread.h"
namespace android
{
int kDefaultBufferCount = 4;
uint32_t kMaxSampleRate = 48000;
uint32_t kDefaultSampleRate = 44100;
uint32_t kDefaultFrameCount = 1200;
SoundPool::SoundPool(jobject soundPoolRef, int maxChannels, int streamType, int srcQuality)
{
LOGV("SoundPool constructor: maxChannels=%d, streamType=%d, srcQuality=%d",
maxChannels, streamType, srcQuality);
// check limits
mMaxChannels = maxChannels;
if (mMaxChannels < 1) {
mMaxChannels = 1;
}
else if (mMaxChannels > 32) {
mMaxChannels = 32;
}
LOGW_IF(maxChannels != mMaxChannels, "App requested %d channels", maxChannels);
mQuit = false;
mSoundPoolRef = soundPoolRef;
mDecodeThread = 0;
mStreamType = streamType;
mSrcQuality = srcQuality;
mAllocated = 0;
mNextSampleID = 0;
mNextChannelID = 0;
mChannelPool = new SoundChannel[mMaxChannels];
for (int i = 0; i < mMaxChannels; ++i) {
mChannelPool[i].init(this);
mChannels.push_back(&mChannelPool[i]);
}
// start decode thread
startThreads();
}
SoundPool::~SoundPool()
{
LOGV("SoundPool destructor");
mDecodeThread->quit();
quit();
Mutex::Autolock lock(&mLock);
mChannels.clear();
if (mChannelPool)
delete [] mChannelPool;
// clean up samples
LOGV("clear samples");
mSamples.clear();
if (mDecodeThread)
delete mDecodeThread;
}
void SoundPool::addToRestartList(SoundChannel* channel)
{
Mutex::Autolock lock(&mLock);
mRestart.push_back(channel);
mCondition.signal();
}
int SoundPool::beginThread(void* arg)
{
SoundPool* p = (SoundPool*)arg;
return p->run();
}
int SoundPool::run()
{
mLock.lock();
while (!mQuit) {
mCondition.wait(mLock);
LOGV("awake");
if (mQuit) break;
while (!mRestart.empty()) {
SoundChannel* channel;
LOGV("Getting channel from list");
List<SoundChannel*>::iterator iter = mRestart.begin();
channel = *iter;
mRestart.erase(iter);
if (channel) channel->nextEvent();
if (mQuit) break;
}
}
mRestart.clear();
mCondition.signal();
mLock.unlock();
LOGV("goodbye");
return 0;
}
void SoundPool::quit()
{
mLock.lock();
mQuit = true;
mCondition.signal();
mCondition.wait(mLock);
LOGV("return from quit");
mLock.unlock();
}
bool SoundPool::startThreads()
{
createThread(beginThread, this);
if (mDecodeThread == NULL)
mDecodeThread = new SoundPoolThread(this);
return mDecodeThread != NULL;
}
SoundChannel* SoundPool::findChannel(int channelID)
{
for (int i = 0; i < mMaxChannels; ++i) {
if (mChannelPool[i].channelID() == channelID) {
return &mChannelPool[i];
}
}
return NULL;
}
SoundChannel* SoundPool::findNextChannel(int channelID)
{
for (int i = 0; i < mMaxChannels; ++i) {
if (mChannelPool[i].nextChannelID() == channelID) {
return &mChannelPool[i];
}
}
return NULL;
}
int SoundPool::load(const char* path, int priority)
{
LOGV("load: path=%s, priority=%d", path, priority);
Mutex::Autolock lock(&mLock);
sp<Sample> sample = new Sample(++mNextSampleID, path);
mSamples.add(sample->sampleID(), sample);
doLoad(sample);
return sample->sampleID();
}
int SoundPool::load(int fd, int64_t offset, int64_t length, int priority)
{
LOGV("load: fd=%d, offset=%lld, length=%lld, priority=%d",
fd, offset, length, priority);
Mutex::Autolock lock(&mLock);
sp<Sample> sample = new Sample(++mNextSampleID, fd, offset, length);
mSamples.add(sample->sampleID(), sample);
doLoad(sample);
return sample->sampleID();
}
void SoundPool::doLoad(sp<Sample>& sample)
{
LOGV("doLoad: loading sample sampleID=%d", sample->sampleID());
sample->startLoad();
mDecodeThread->loadSample(sample->sampleID());
}
bool SoundPool::unload(int sampleID)
{
LOGV("unload: sampleID=%d", sampleID);
Mutex::Autolock lock(&mLock);
return mSamples.removeItem(sampleID);
}
int SoundPool::play(int sampleID, float leftVolume, float rightVolume,
int priority, int loop, float rate)
{
LOGV("sampleID=%d, leftVolume=%f, rightVolume=%f, priority=%d, loop=%d, rate=%f",
sampleID, leftVolume, rightVolume, priority, loop, rate);
sp<Sample> sample;
SoundChannel* channel;
int channelID;
// scope for lock
{
Mutex::Autolock lock(&mLock);
// is sample ready?
sample = findSample(sampleID);
if ((sample == 0) || (sample->state() != Sample::READY)) {
LOGW(" sample %d not READY", sampleID);
return 0;
}
dump();
// allocate a channel
channel = allocateChannel(priority);
// no channel allocated - return 0
if (!channel) {
LOGV("No channel allocated");
return 0;
}
channelID = ++mNextChannelID;
}
LOGV("channel state = %d", channel->state());
channel->play(sample, channelID, leftVolume, rightVolume, priority, loop, rate);
return channelID;
}
SoundChannel* SoundPool::allocateChannel(int priority)
{
List<SoundChannel*>::iterator iter;
SoundChannel* channel = NULL;
// allocate a channel
if (!mChannels.empty()) {
iter = mChannels.begin();
if (priority >= (*iter)->priority()) {
channel = *iter;
mChannels.erase(iter);
LOGV("Allocated active channel");
}
}
// update priority and put it back in the list
if (channel) {
channel->setPriority(priority);
for (iter = mChannels.begin(); iter != mChannels.end(); ++iter) {
if (priority < (*iter)->priority()) {
break;
}
}
mChannels.insert(iter, channel);
}
return channel;
}
// move a channel from its current position to the front of the list
void SoundPool::moveToFront(SoundChannel* channel)
{
for (List<SoundChannel*>::iterator iter = mChannels.begin(); iter != mChannels.end(); ++iter) {
if (*iter == channel) {
mChannels.erase(iter);
mChannels.push_front(channel);
break;
}
}
}
void SoundPool::pause(int channelID)
{
LOGV("pause(%d)", channelID);
Mutex::Autolock lock(&mLock);
SoundChannel* channel = findChannel(channelID);
if (channel) {
channel->pause();
}
}
void SoundPool::resume(int channelID)
{
LOGV("resume(%d)", channelID);
Mutex::Autolock lock(&mLock);
SoundChannel* channel = findChannel(channelID);
if (channel) {
channel->resume();
}
}
void SoundPool::stop(int channelID)
{
LOGV("stop(%d)", channelID);
Mutex::Autolock lock(&mLock);
SoundChannel* channel = findChannel(channelID);
if (channel) {
channel->stop();
} else {
channel = findNextChannel(channelID);
if (channel)
channel->clearNextEvent();
}
}
void SoundPool::setVolume(int channelID, float leftVolume, float rightVolume)
{
Mutex::Autolock lock(&mLock);
SoundChannel* channel = findChannel(channelID);
if (channel) {
channel->setVolume(leftVolume, rightVolume);
}
}
void SoundPool::setPriority(int channelID, int priority)
{
LOGV("setPriority(%d, %d)", channelID, priority);
Mutex::Autolock lock(&mLock);
SoundChannel* channel = findChannel(channelID);
if (channel) {
channel->setPriority(priority);
}
}
void SoundPool::setLoop(int channelID, int loop)
{
LOGV("setLoop(%d, %d)", channelID, loop);
Mutex::Autolock lock(&mLock);
SoundChannel* channel = findChannel(channelID);
if (channel) {
channel->setLoop(loop);
}
}
void SoundPool::setRate(int channelID, float rate)
{
LOGV("setRate(%d, %f)", channelID, rate);
Mutex::Autolock lock(&mLock);
SoundChannel* channel = findChannel(channelID);
if (channel) {
channel->setRate(rate);
}
}
// call with lock held
void SoundPool::done(SoundChannel* channel)
{
LOGV("done(%d)", channel->channelID());
// if "stolen", play next event
if (channel->nextChannelID() != 0) {
LOGV("add to restart list");
addToRestartList(channel);
}
// return to idle state
else {
LOGV("move to front");
moveToFront(channel);
}
}
void SoundPool::dump()
{
for (int i = 0; i < mMaxChannels; ++i) {
mChannelPool[i].dump();
}
}
Sample::Sample(int sampleID, const char* url)
{
init();
mSampleID = sampleID;
mUrl = strdup(url);
LOGV("create sampleID=%d, url=%s", mSampleID, mUrl);
}
Sample::Sample(int sampleID, int fd, int64_t offset, int64_t length)
{
init();
mSampleID = sampleID;
mFd = dup(fd);
mOffset = offset;
mLength = length;
LOGV("create sampleID=%d, fd=%d, offset=%lld, length=%lld", mSampleID, mFd, mLength, mOffset);
}
void Sample::init()
{
mData = 0;
mSize = 0;
mRefCount = 0;
mSampleID = 0;
mState = UNLOADED;
mFd = -1;
mOffset = 0;
mLength = 0;
mUrl = 0;
}
Sample::~Sample()
{
LOGV("Sample::destructor sampleID=%d, fd=%d", mSampleID, mFd);
if (mFd > 0) {
LOGV("close(%d)", mFd);
::close(mFd);
}
mData.clear();
delete mUrl;
}
void Sample::doLoad()
{
uint32_t sampleRate;
int numChannels;
int format;
sp<IMemory> p;
LOGV("Start decode");
if (mUrl) {
p = MediaPlayer::decode(mUrl, &sampleRate, &numChannels, &format);
} else {
p = MediaPlayer::decode(mFd, mOffset, mLength, &sampleRate, &numChannels, &format);
LOGV("close(%d)", mFd);
::close(mFd);
mFd = -1;
}
if (p == 0) {
LOGE("Unable to load sample: %s", mUrl);
return;
}
LOGV("pointer = %p, size = %u, sampleRate = %u, numChannels = %d",
p->pointer(), p->size(), sampleRate, numChannels);
if (sampleRate > kMaxSampleRate) {
LOGE("Sample rate (%u) out of range", sampleRate);
return;
}
if ((numChannels < 1) || (numChannels > 2)) {
LOGE("Sample channel count (%d) out of range", numChannels);
return;
}
//_dumpBuffer(p->pointer(), p->size());
uint8_t* q = static_cast<uint8_t*>(p->pointer()) + p->size() - 10;
//_dumpBuffer(q, 10, 10, false);
mData = p;
mSize = p->size();
mSampleRate = sampleRate;
mNumChannels = numChannels;
mFormat = format;
mState = READY;
}
void SoundChannel::init(SoundPool* soundPool)
{
mSoundPool = soundPool;
}
void SoundChannel::play(const sp<Sample>& sample, int nextChannelID, float leftVolume,
float rightVolume, int priority, int loop, float rate)
{
AudioTrack* oldTrack;
LOGV("play %p: sampleID=%d, channelID=%d, leftVolume=%f, rightVolume=%f, priority=%d, loop=%d, rate=%f",
this, sample->sampleID(), nextChannelID, leftVolume, rightVolume, priority, loop, rate);
// if not idle, this voice is being stolen
if (mState != IDLE) {
LOGV("channel %d stolen - event queued for channel %d", channelID(), nextChannelID);
stop_l();
mNextEvent.set(sample, nextChannelID, leftVolume, rightVolume, priority, loop, rate);
#ifdef USE_SHARED_MEM_BUFFER
mSoundPool->done(this);
#endif
return;
}
// initialize track
int afFrameCount;
int afSampleRate;
int streamType = mSoundPool->streamType();
if (AudioSystem::getOutputFrameCount(&afFrameCount, streamType) != NO_ERROR) {
afFrameCount = kDefaultFrameCount;
}
if (AudioSystem::getOutputSamplingRate(&afSampleRate, streamType) != NO_ERROR) {
afSampleRate = kDefaultSampleRate;
}
int numChannels = sample->numChannels();
uint32_t sampleRate = uint32_t(float(sample->sampleRate()) * rate + 0.5);
uint32_t bufferFrames = (afFrameCount * sampleRate) / afSampleRate;
uint32_t frameCount = 0;
if (loop) {
frameCount = sample->size()/numChannels/((sample->format() == AudioSystem::PCM_16_BIT) ? sizeof(int16_t) : sizeof(uint8_t));
}
#ifndef USE_SHARED_MEM_BUFFER
// Ensure minimum audio buffer size in case of short looped sample
if(frameCount < kDefaultBufferCount * bufferFrames) {
frameCount = kDefaultBufferCount * bufferFrames;
}
#endif
AudioTrack* newTrack;
// mToggle toggles each time a track is started on a given channel.
// The toggle is concatenated with the SoundChannel address and passed to AudioTrack
// as callback user data. This enables the detection of callbacks received from the old
// audio track while the new one is being started and avoids processing them with
// wrong audio audio buffer size (mAudioBufferSize)
unsigned long toggle = mToggle ^ 1;
void *userData = (void *)((unsigned long)this | toggle);
#ifdef USE_SHARED_MEM_BUFFER
newTrack = new AudioTrack(streamType, sampleRate, sample->format(),
numChannels, sample->getIMemory(), 0, callback, userData);
#else
newTrack = new AudioTrack(streamType, sampleRate, sample->format(),
numChannels, frameCount, 0, callback, userData, bufferFrames);
#endif
if (newTrack->initCheck() != NO_ERROR) {
LOGE("Error creating AudioTrack");
delete newTrack;
return;
}
LOGV("setVolume %p", newTrack);
newTrack->setVolume(leftVolume, rightVolume);
newTrack->setLoop(0, frameCount, loop);
{
Mutex::Autolock lock(&mLock);
// From now on, AudioTrack callbacks recevieved with previous toggle value will be ignored.
mToggle = toggle;
oldTrack = mAudioTrack;
mAudioTrack = newTrack;
mPos = 0;
mSample = sample;
mChannelID = nextChannelID;
mPriority = priority;
mLoop = loop;
mLeftVolume = leftVolume;
mRightVolume = rightVolume;
mNumChannels = numChannels;
mRate = rate;
clearNextEvent();
mState = PLAYING;
mAudioTrack->start();
mAudioBufferSize = newTrack->frameCount()*newTrack->frameSize();
}
LOGV("delete oldTrack %p", oldTrack);
delete oldTrack;
}
void SoundChannel::nextEvent()
{
sp<Sample> sample;
int nextChannelID;
float leftVolume;
float rightVolume;
int priority;
int loop;
float rate;
// check for valid event
{
Mutex::Autolock lock(&mLock);
nextChannelID = mNextEvent.channelID();
if (nextChannelID == 0) {
LOGV("stolen channel has no event");
return;
}
sample = mNextEvent.sample();
leftVolume = mNextEvent.leftVolume();
rightVolume = mNextEvent.rightVolume();
priority = mNextEvent.priority();
loop = mNextEvent.loop();
rate = mNextEvent.rate();
}
LOGV("Starting stolen channel %d -> %d", channelID(), nextChannelID);
play(sample, nextChannelID, leftVolume, rightVolume, priority, loop, rate);
}
void SoundChannel::callback(int event, void* user, void *info)
{
unsigned long toggle = (unsigned long)user & 1;
SoundChannel* channel = static_cast<SoundChannel*>((void *)((unsigned long)user & ~1));
if (channel->mToggle != toggle) {
LOGV("callback with wrong toggle");
return;
}
channel->process(event, info);
}
void SoundChannel::process(int event, void *info)
{
//LOGV("process(%d)", mChannelID);
sp<Sample> sample = mSample;
// LOGV("SoundChannel::process event %d", event);
if (event == AudioTrack::EVENT_MORE_DATA) {
AudioTrack::Buffer* b = static_cast<AudioTrack::Buffer *>(info);
// check for stop state
if (b->size == 0) return;
if (sample != 0) {
// fill buffer
uint8_t* q = (uint8_t*) b->i8;
size_t count = 0;
if (mPos < (int)sample->size()) {
uint8_t* p = sample->data() + mPos;
count = sample->size() - mPos;
if (count > b->size) {
count = b->size;
}
memcpy(q, p, count);
LOGV("fill: q=%p, p=%p, mPos=%u, b->size=%u, count=%d", q, p, mPos, b->size, count);
} else if (mPos < mAudioBufferSize) {
count = mAudioBufferSize - mPos;
if (count > b->size) {
count = b->size;
}
memset(q, 0, count);
LOGV("fill extra: q=%p, mPos=%u, b->size=%u, count=%d", q, mPos, b->size, count);
}
mPos += count;
b->size = count;
//LOGV("buffer=%p, [0]=%d", b->i16, b->i16[0]);
}
} else if (event == AudioTrack::EVENT_UNDERRUN) {
LOGV("stopping track");
stop();
} else if (event == AudioTrack::EVENT_LOOP_END) {
LOGV("End loop: %d", *(int *)info);
}
}
// call with lock held
void SoundChannel::stop_l()
{
if (mState != IDLE) {
setVolume_l(0, 0);
LOGV("stop");
mAudioTrack->stop();
mSample.clear();
mState = IDLE;
mPriority = IDLE_PRIORITY;
}
}
void SoundChannel::stop()
{
{
Mutex::Autolock lock(&mLock);
stop_l();
}
mSoundPool->done(this);
}
//FIXME: Pause is a little broken right now
void SoundChannel::pause()
{
Mutex::Autolock lock(&mLock);
if (mState == PLAYING) {
LOGV("pause track");
mState = PAUSED;
mAudioTrack->pause();
}
}
void SoundChannel::resume()
{
Mutex::Autolock lock(&mLock);
if (mState == PAUSED) {
LOGV("resume track");
mState = PLAYING;
mAudioTrack->start();
}
}
void SoundChannel::setRate(float rate)
{
Mutex::Autolock lock(&mLock);
if (mAudioTrack != 0 && mSample.get() != 0) {
uint32_t sampleRate = uint32_t(float(mSample->sampleRate()) * rate + 0.5);
mAudioTrack->setSampleRate(sampleRate);
mRate = rate;
}
}
// call with lock held
void SoundChannel::setVolume_l(float leftVolume, float rightVolume)
{
mLeftVolume = leftVolume;
mRightVolume = rightVolume;
if (mAudioTrack != 0) mAudioTrack->setVolume(leftVolume, rightVolume);
}
void SoundChannel::setVolume(float leftVolume, float rightVolume)
{
Mutex::Autolock lock(&mLock);
setVolume_l(leftVolume, rightVolume);
}
void SoundChannel::setLoop(int loop)
{
Mutex::Autolock lock(&mLock);
if (mAudioTrack != 0 && mSample.get() != 0) {
mAudioTrack->setLoop(0, mSample->size()/mNumChannels/((mSample->format() == AudioSystem::PCM_16_BIT) ? sizeof(int16_t) : sizeof(uint8_t)), loop);
mLoop = loop;
}
}
SoundChannel::~SoundChannel()
{
LOGV("SoundChannel destructor");
if (mAudioTrack) {
LOGV("stop track");
mAudioTrack->stop();
delete mAudioTrack;
}
clearNextEvent();
mSample.clear();
}
void SoundChannel::dump()
{
LOGV("mState = %d mChannelID=%d, mNumChannels=%d, mPos = %d, mPriority=%d, mLoop=%d",
mState, mChannelID, mNumChannels, mPos, mPriority, mLoop);
}
void SoundEvent::set(const sp<Sample>& sample, int channelID, float leftVolume,
float rightVolume, int priority, int loop, float rate)
{
mSample =sample;
mChannelID = channelID;
mLeftVolume = leftVolume;
mRightVolume = rightVolume;
mPriority = priority;
mLoop = loop;
mRate =rate;
}
} // end namespace android