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Refactor the audio streaming code to be a bit saner

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openmw-38
Chris Robinson 9 years ago
parent 16f72886e9
commit 83721092f2
1 changed files with 78 additions and 86 deletions
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150
apps/openmw/mwsound/openal_output.cpp
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@ -150,18 +150,6 @@ static ALenum getALFormat(ChannelConfig chans, SampleType type)
return AL_NONE;
}
static ALint getBufferSampleCount(ALuint buf)
{
ALint size, bits, channels;
alGetBufferi(buf, AL_SIZE, &size);
alGetBufferi(buf, AL_BITS, &bits);
alGetBufferi(buf, AL_CHANNELS, &channels);
throwALerror();
return size / channels * 8 / bits;
}
//
// A streaming OpenAL sound.
//
@ -174,17 +162,17 @@ class OpenAL_SoundStream : public Sound
ALuint mSource;
ALuint mBuffers[sNumBuffers];
ALint mCurrentBufIdx;
ALenum mFormat;
ALsizei mSampleRate;
ALuint mBufferSize;
ALuint mSamplesQueued;
ALuint mFrameSize;
ALint mSilence;
DecoderPtr mDecoder;
volatile bool mIsFinished;
volatile bool mIsInitialBatchEnqueued;
void updateAll(bool local);
@ -204,6 +192,7 @@ public:
void play();
bool process();
ALint refillQueue();
};
const ALfloat OpenAL_SoundStream::sBufferLength = 0.125f;
@ -277,7 +266,8 @@ private:
OpenAL_SoundStream::OpenAL_SoundStream(OpenAL_Output &output, ALuint src, DecoderPtr decoder, float basevol, float pitch, int flags)
: Sound(osg::Vec3f(0.f, 0.f, 0.f), 1.0f, basevol, pitch, 1.0f, 1000.0f, flags)
, mOutput(output), mSource(src), mSamplesQueued(0), mDecoder(decoder), mIsFinished(true), mIsInitialBatchEnqueued(false)
, mOutput(output), mSource(src), mCurrentBufIdx(0), mFrameSize(0), mSilence(0)
, mDecoder(decoder), mIsFinished(true)
{
throwALerror();
@ -293,8 +283,16 @@ OpenAL_SoundStream::OpenAL_SoundStream(OpenAL_Output &output, ALuint src, Decode
mFormat = getALFormat(chans, type);
mSampleRate = srate;
switch(type)
{
case SampleType_UInt8: mSilence = 0x80;
case SampleType_Int16: mSilence = 0x00;
case SampleType_Float32: mSilence = 0x00;
}
mFrameSize = framesToBytes(1, chans, type);
mBufferSize = static_cast<ALuint>(sBufferLength*srate);
mBufferSize = framesToBytes(mBufferSize, chans, type);
mBufferSize *= mFrameSize;
mOutput.mActiveStreams.push_back(this);
}
@ -327,9 +325,8 @@ void OpenAL_SoundStream::play()
alSourceStop(mSource);
alSourcei(mSource, AL_BUFFER, 0);
throwALerror();
mSamplesQueued = 0;
mIsFinished = false;
mIsInitialBatchEnqueued = false;
mOutput.mStreamThread->add(this);
}
@ -337,12 +334,10 @@ void OpenAL_SoundStream::stop()
{
mOutput.mStreamThread->remove(this);
mIsFinished = true;
mIsInitialBatchEnqueued = false;
alSourceStop(mSource);
alSourcei(mSource, AL_BUFFER, 0);
throwALerror();
mSamplesQueued = 0;
mDecoder->rewind();
}
@ -351,6 +346,7 @@ bool OpenAL_SoundStream::isPlaying()
{
ALint state;
boost::lock_guard<boost::recursive_mutex> lock(mOutput.mStreamThread->mMutex);
alGetSourcei(mSource, AL_SOURCE_STATE, &state);
throwALerror();
@ -362,17 +358,26 @@ bool OpenAL_SoundStream::isPlaying()
double OpenAL_SoundStream::getTimeOffset()
{
ALint state = AL_STOPPED;
ALfloat offset = 0.0f;
ALint offset;
double t;
mOutput.mStreamThread->mMutex.lock();
alGetSourcef(mSource, AL_SEC_OFFSET, &offset);
boost::unique_lock<boost::recursive_mutex> lock(mOutput.mStreamThread->mMutex);
alGetSourcei(mSource, AL_SAMPLE_OFFSET, &offset);
alGetSourcei(mSource, AL_SOURCE_STATE, &state);
if(state == AL_PLAYING || state == AL_PAUSED)
t = (double)(mDecoder->getSampleOffset() - mSamplesQueued)/(double)mSampleRate + offset;
{
ALint queued;
alGetSourcei(mSource, AL_BUFFERS_QUEUED, &queued);
ALint inqueue = mBufferSize/mFrameSize*queued + offset;
t = (double)(mDecoder->getSampleOffset() - inqueue) / (double)mSampleRate;
}
else
{
/* Underrun, or not started yet. The decoder offset is where we'll play
* next. */
t = (double)mDecoder->getSampleOffset() / (double)mSampleRate;
mOutput.mStreamThread->mMutex.unlock();
}
lock.unlock();
throwALerror();
return t;
@ -418,78 +423,65 @@ void OpenAL_SoundStream::update()
bool OpenAL_SoundStream::process()
{
try {
bool finished = mIsFinished;
ALint processed, state;
if(refillQueue() > 0)
{
ALint state;
alGetSourcei(mSource, AL_SOURCE_STATE, &state);
alGetSourcei(mSource, AL_BUFFERS_PROCESSED, &processed);
throwALerror();
if(processed > 0)
if(state != AL_PLAYING && state != AL_PAUSED)
{
std::vector<char> data(mBufferSize);
do {
ALuint bufid = 0;
size_t got;
alSourceUnqueueBuffers(mSource, 1, &bufid);
mSamplesQueued -= getBufferSampleCount(bufid);
processed--;
if(finished)
continue;
if(refillQueue() > 0)
alSourcePlay(mSource);
throwALerror();
}
}
}
catch(std::exception&) {
std::cout<< "Error updating stream \""<<mDecoder->getName()<<"\"" <<std::endl;
mIsFinished = true;
}
return !mIsFinished;
}
got = mDecoder->read(&data[0], data.size());
finished = (got < data.size());
if(got > 0)
ALint OpenAL_SoundStream::refillQueue()
{
ALint processed;
alGetSourcei(mSource, AL_BUFFERS_PROCESSED, &processed);
while(processed > 0)
{
alBufferData(bufid, mFormat, &data[0], got, mSampleRate);
alSourceQueueBuffers(mSource, 1, &bufid);
mSamplesQueued += getBufferSampleCount(bufid);
ALuint buf;
alSourceUnqueueBuffers(mSource, 1, &buf);
--processed;
}
} while(processed > 0);
throwALerror();
}
else if (!mIsInitialBatchEnqueued) { // nothing enqueued yet
std::vector<char> data(mBufferSize);
for(ALuint i = 0;i < sNumBuffers && !finished;i++)
ALint queued;
alGetSourcei(mSource, AL_BUFFERS_QUEUED, &queued);
if(!mIsFinished && (ALuint)queued < sNumBuffers)
{
std::vector<char> data(mBufferSize);
for(;!mIsFinished && (ALuint)queued < sNumBuffers;++queued)
{
size_t got = mDecoder->read(&data[0], data.size());
finished = (got < data.size());
if(got < data.size())
{
mIsFinished = true;
memset(&data[got], mSilence, data.size()-got);
}
if(got > 0)
{
ALuint bufid = mBuffers[i];
alBufferData(bufid, mFormat, &data[0], got, mSampleRate);
ALuint bufid = mBuffers[mCurrentBufIdx];
alBufferData(bufid, mFormat, &data[0], data.size(), mSampleRate);
alSourceQueueBuffers(mSource, 1, &bufid);
throwALerror();
mSamplesQueued += getBufferSampleCount(bufid);
}
mCurrentBufIdx = (mCurrentBufIdx+1) % sNumBuffers;
}
mIsInitialBatchEnqueued = true;
}
if(state != AL_PLAYING && state != AL_PAUSED)
{
ALint queued = 0;
alGetSourcei(mSource, AL_BUFFERS_QUEUED, &queued);
if(queued > 0)
alSourcePlay(mSource);
throwALerror();
}
mIsFinished = finished;
}
catch(std::exception&) {
std::cout<< "Error updating stream \""<<mDecoder->getName()<<"\"" <<std::endl;
mSamplesQueued = 0;
mIsFinished = true;
mIsInitialBatchEnqueued = false;
}
return !mIsFinished;
return queued;
}
//
// A regular 2D OpenAL sound
//

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