blob: 809e81b13a45a4569067f586e3c30fbc2bad6e4d [file] [log] [blame]
/*
* Copyright (C) 2019 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::Stream"
#include <utils/Log.h>
#include "Stream.h"
#include "StreamManager.h"
namespace android::soundpool {
Stream::~Stream()
{
ALOGV("%s(%p)", __func__, this);
}
void Stream::autoPause()
{
std::lock_guard lock(mLock);
if (mState == PLAYING) {
ALOGV("%s: track streamID: %d", __func__, (int)mStreamID);
mState = PAUSED;
mAutoPaused = true;
if (mAudioTrack != nullptr) {
mAudioTrack->pause();
}
}
}
void Stream::autoResume()
{
std::lock_guard lock(mLock);
if (mAutoPaused) {
if (mState == PAUSED) {
ALOGV("%s: track streamID: %d", __func__, (int)mStreamID);
mState = PLAYING;
if (mAudioTrack != nullptr) {
mAudioTrack->start();
}
}
mAutoPaused = false; // New for R: always reset autopause (consistent with API spec).
}
}
void Stream::mute(bool muting)
{
std::lock_guard lock(mLock);
mMuted = muting;
if (mAudioTrack != nullptr) {
if (mMuted) {
mAudioTrack->setVolume(0.0f, 0.0f);
} else {
mAudioTrack->setVolume(mLeftVolume, mRightVolume);
}
}
}
void Stream::pause(int32_t streamID)
{
std::lock_guard lock(mLock);
if (streamID == mStreamID) {
if (mState == PLAYING) {
ALOGV("%s: track streamID: %d", __func__, streamID);
mState = PAUSED;
if (mAudioTrack != nullptr) {
mAudioTrack->pause();
}
}
}
}
void Stream::resume(int32_t streamID)
{
std::lock_guard lock(mLock);
if (streamID == mStreamID) {
if (mState == PAUSED) {
ALOGV("%s: track streamID: %d", __func__, streamID);
mState = PLAYING;
if (mAudioTrack != nullptr) {
mAudioTrack->start();
}
mAutoPaused = false; // TODO: is this right? (ambiguous per spec), move outside?
}
}
}
void Stream::setRate(int32_t streamID, float rate)
{
std::lock_guard lock(mLock);
if (streamID == mStreamID) {
mRate = rate;
if (mAudioTrack != nullptr && mSound != nullptr) {
const uint32_t sampleRate = uint32_t(float(mSound->getSampleRate()) * rate + 0.5);
mAudioTrack->setSampleRate(sampleRate);
}
}
}
void Stream::setVolume_l(float leftVolume, float rightVolume)
{
mLeftVolume = leftVolume;
mRightVolume = rightVolume;
if (mAudioTrack != nullptr && !mMuted) {
mAudioTrack->setVolume(leftVolume, rightVolume);
}
}
void Stream::setVolume(int32_t streamID, float leftVolume, float rightVolume)
{
std::lock_guard lock(mLock);
if (streamID == mStreamID) {
setVolume_l(leftVolume, rightVolume);
}
}
void Stream::setPriority(int32_t streamID, int32_t priority)
{
std::lock_guard lock(mLock);
if (streamID == mStreamID) {
mPriority = priority;
}
}
void Stream::setLoop(int32_t streamID, int32_t loop)
{
std::lock_guard lock(mLock);
if (streamID == mStreamID) {
if (mAudioTrack != nullptr && mSound != nullptr) {
const uint32_t loopEnd = mSound->getSizeInBytes() / mSound->getChannelCount() /
(mSound->getFormat() == AUDIO_FORMAT_PCM_16_BIT
? sizeof(int16_t) : sizeof(uint8_t));
mAudioTrack->setLoop(0, loopEnd, loop);
}
mLoop = loop;
}
}
void Stream::setPlay(
int32_t streamID, const std::shared_ptr<Sound> &sound, int32_t soundID,
float leftVolume, float rightVolume, int32_t priority, int32_t loop, float rate)
{
std::lock_guard lock(mLock);
// We must be idle, or we must be repurposing a pending Stream.
LOG_ALWAYS_FATAL_IF(mState != IDLE && mAudioTrack != nullptr, "State %d must be IDLE", mState);
mSound = sound;
mSoundID = soundID;
mLeftVolume = leftVolume;
mRightVolume = rightVolume;
mPriority = priority;
mLoop = loop;
mRate = rate;
mState = PLAYING;
mAutoPaused = false; // New for R (consistent with Java API spec).
mStreamID = streamID; // prefer this to be the last, as it is an atomic sync point
}
void Stream::setStopTimeNs(int64_t stopTimeNs)
{
std::lock_guard lock(mLock);
mStopTimeNs = stopTimeNs;
}
bool Stream::requestStop(int32_t streamID)
{
std::lock_guard lock(mLock);
if (streamID == mStreamID) {
ALOGV("%s: track streamID: %d", __func__, streamID);
if (mAudioTrack != nullptr) {
if (mState == PLAYING && !mMuted && (mLeftVolume != 0.f || mRightVolume != 0.f)) {
setVolume_l(0.f, 0.f);
mStopTimeNs = systemTime() + kStopWaitTimeNs;
} else {
mStopTimeNs = systemTime();
}
return true; // must be queued on the restart list.
}
stop_l();
}
return false;
}
void Stream::stop()
{
std::lock_guard lock(mLock);
stop_l();
}
void Stream::stop_l()
{
if (mState != IDLE) {
ALOGV("%s: track streamID: %d", __func__, (int)mStreamID);
if (mAudioTrack != nullptr) {
mAudioTrack->stop();
}
mSound.reset();
mState = IDLE;
}
}
void Stream::clearAudioTrack()
{
// This will invoke the destructor which waits for the AudioTrack thread to join,
// and is currently the only safe way to ensure there are no callbacks afterwards.
mAudioTrack.clear();
}
Stream* Stream::getPairStream() const
{
return mStreamManager->getPairStream(this);
}
Stream* Stream::playPairStream() {
Stream* pairStream = getPairStream();
LOG_ALWAYS_FATAL_IF(pairStream == nullptr, "No pair stream!");
sp<AudioTrack> releaseTracks[2];
{
ALOGV("%s: track streamID: %d", __func__, (int)mStreamID);
// TODO: Do we really want to force a simultaneous synchronization between
// the stream and its pair?
// note locking order - the paired stream is obtained before the queued stream.
// we can invert the locking order, but it is slightly more optimal to do it this way.
std::lock_guard lockp(pairStream->mLock);
if (pairStream->mSound == nullptr) {
return nullptr; // no pair sound
}
{
std::lock_guard lock(mLock);
LOG_ALWAYS_FATAL_IF(mState != IDLE, "State: %d must be IDLE", mState);
// TODO: do we want a specific set() here?
pairStream->mAudioTrack = mAudioTrack;
pairStream->mSoundID = mSoundID; // optimization to reuse AudioTrack.
pairStream->mToggle = mToggle;
pairStream->mAutoPaused = mAutoPaused; // save autopause state
pairStream->mMuted = mMuted;
mAudioTrack.clear(); // the pair owns the audiotrack.
mSound.reset();
mSoundID = 0;
}
// TODO: do we need a specific play_l() anymore?
const int pairState = pairStream->mState;
pairStream->play_l(pairStream->mSound, pairStream->mStreamID,
pairStream->mLeftVolume, pairStream->mRightVolume, pairStream->mPriority,
pairStream->mLoop, pairStream->mRate, releaseTracks);
if (pairStream->mState == IDLE) {
return nullptr; // AudioTrack error
}
if (pairState == PAUSED) { // reestablish pause
pairStream->mState = PAUSED;
pairStream->mAudioTrack->pause();
}
}
// release tracks outside of Stream lock
return pairStream;
}
void Stream::play_l(const std::shared_ptr<Sound>& sound, int32_t nextStreamID,
float leftVolume, float rightVolume, int32_t priority, int32_t loop, float rate,
sp<AudioTrack> releaseTracks[2])
{
// These tracks are released without the lock.
sp<AudioTrack> &oldTrack = releaseTracks[0];
sp<AudioTrack> &newTrack = releaseTracks[1];
status_t status = NO_ERROR;
{
ALOGV("%s(%p)(soundID=%d, streamID=%d, leftVolume=%f, rightVolume=%f,"
" priority=%d, loop=%d, rate=%f)",
__func__, this, sound->getSoundID(), nextStreamID, leftVolume, rightVolume,
priority, loop, rate);
// initialize track
const audio_stream_type_t streamType =
AudioSystem::attributesToStreamType(*mStreamManager->getAttributes());
const int32_t channelCount = sound->getChannelCount();
const uint32_t sampleRate = uint32_t(float(sound->getSampleRate()) * rate + 0.5);
size_t frameCount = 0;
if (loop) {
const audio_format_t format = sound->getFormat();
const size_t frameSize = audio_is_linear_pcm(format)
? channelCount * audio_bytes_per_sample(format) : 1;
frameCount = sound->getSizeInBytes() / frameSize;
}
// check if the existing track has the same sound id.
if (mAudioTrack != nullptr && mSoundID == sound->getSoundID()) {
// the sample rate may fail to change if the audio track is a fast track.
if (mAudioTrack->setSampleRate(sampleRate) == NO_ERROR) {
newTrack = mAudioTrack;
ALOGV("%s: reusing track %p for sound %d",
__func__, mAudioTrack.get(), sound->getSoundID());
}
}
if (newTrack == 0) {
// mToggle toggles each time a track is started on a given stream.
// The toggle is concatenated with the Stream 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)
auto toggle = mToggle ^ 1;
void* userData = (void*)((uintptr_t)this | toggle);
audio_channel_mask_t soundChannelMask = sound->getChannelMask();
// When sound contains a valid channel mask, use it as is.
// Otherwise, use stream count to calculate channel mask.
audio_channel_mask_t channelMask = soundChannelMask != AUDIO_CHANNEL_NONE
? soundChannelMask : audio_channel_out_mask_from_count(channelCount);
// do not create a new audio track if current track is compatible with sound parameters
newTrack = new AudioTrack(streamType, sampleRate, sound->getFormat(),
channelMask, sound->getIMemory(), AUDIO_OUTPUT_FLAG_FAST,
staticCallback, userData,
0 /*default notification frames*/, AUDIO_SESSION_ALLOCATE,
AudioTrack::TRANSFER_DEFAULT,
nullptr /*offloadInfo*/, -1 /*uid*/, -1 /*pid*/,
mStreamManager->getAttributes());
oldTrack = mAudioTrack;
status = newTrack->initCheck();
if (status != NO_ERROR) {
ALOGE("%s: error creating AudioTrack", __func__);
// newTrack goes out of scope, so reference count drops to zero
goto exit;
}
// From now on, AudioTrack callbacks received with previous toggle value will be ignored.
mToggle = toggle;
mAudioTrack = newTrack;
ALOGV("%s: using new track %p for sound %d",
__func__, newTrack.get(), sound->getSoundID());
}
if (mMuted) {
newTrack->setVolume(0.0f, 0.0f);
} else {
newTrack->setVolume(leftVolume, rightVolume);
}
newTrack->setLoop(0, frameCount, loop);
mAudioTrack->start();
mSound = sound;
mSoundID = sound->getSoundID();
mPriority = priority;
mLoop = loop;
mLeftVolume = leftVolume;
mRightVolume = rightVolume;
mRate = rate;
mState = PLAYING;
mStopTimeNs = 0;
mStreamID = nextStreamID; // prefer this to be the last, as it is an atomic sync point
}
exit:
ALOGV("%s: delete oldTrack %p", __func__, oldTrack.get());
if (status != NO_ERROR) {
// TODO: should we consider keeping the soundID if the old track is OK?
// Do not attempt to restart this track (should we remove the stream id?)
mState = IDLE;
mSoundID = 0;
mSound.reset();
mAudioTrack.clear(); // actual release from releaseTracks[]
}
}
/* static */
void Stream::staticCallback(int event, void* user, void* info)
{
const uintptr_t userAsInt = (uintptr_t)user;
Stream* stream = reinterpret_cast<Stream*>(userAsInt & ~1);
stream->callback(event, info, userAsInt & 1, 0 /* tries */);
}
void Stream::callback(int event, void* info, int toggle, int tries)
{
ALOGV("%s streamID %d", __func__, (int)mStreamID);
int32_t activeStreamIDToRestart = 0;
{
std::unique_lock lock(mLock);
if (mAudioTrack == nullptr) {
// The AudioTrack is either with this stream or its pair.
// if this swaps a few times, the toggle is bound to be wrong, so we fail then.
//
// TODO: Modify AudioTrack callbacks to avoid the hacky toggle and retry
// logic here.
if (tries < 3) {
lock.unlock();
getPairStream()->callback(event, info, toggle, tries + 1);
} else {
ALOGW("%s streamID %d cannot find track", __func__, (int)mStreamID);
}
return;
}
if (mToggle != toggle) {
ALOGD("%s streamID %d wrong toggle", __func__, (int)mStreamID);
return;
}
switch (event) {
case AudioTrack::EVENT_MORE_DATA:
ALOGW("%s streamID %d Invalid EVENT_MORE_DATA for static track",
__func__, (int)mStreamID);
break;
case AudioTrack::EVENT_UNDERRUN:
ALOGW("%s streamID %d Invalid EVENT_UNDERRUN for static track",
__func__, (int)mStreamID);
break;
case AudioTrack::EVENT_BUFFER_END:
ALOGV("%s streamID %d EVENT_BUFFER_END", __func__, (int)mStreamID);
if (mState != IDLE) {
activeStreamIDToRestart = mStreamID;
mStopTimeNs = systemTime();
}
break;
case AudioTrack::EVENT_LOOP_END:
ALOGV("%s streamID %d EVENT_LOOP_END", __func__, (int)mStreamID);
break;
case AudioTrack::EVENT_NEW_IAUDIOTRACK:
ALOGV("%s streamID %d NEW_IAUDIOTRACK", __func__, (int)mStreamID);
break;
default:
ALOGW("%s streamID %d Invalid event %d", __func__, (int)mStreamID, event);
break;
}
} // lock ends here. This is on the callback thread, no need to be precise.
if (activeStreamIDToRestart > 0) {
// Restart only if a particular streamID is still current and active.
ALOGV("%s: moveToRestartQueue %d", __func__, activeStreamIDToRestart);
mStreamManager->moveToRestartQueue(this, activeStreamIDToRestart);
}
}
void Stream::dump() const
{
ALOGV("mPairStream=%p, mState=%d, mStreamID=%d, mSoundID=%d, mPriority=%d, mLoop=%d",
getPairStream(), mState, (int)mStreamID, mSoundID, mPriority, mLoop);
}
} // namespace android::soundpool