void AUD_SoftwareDevice::mix(data_t* buffer, int length)
{
m_buffer.assureSize(length * AUD_SAMPLE_SIZE(m_specs));
lock();
{
AUD_Reference<AUD_SoftwareDevice::AUD_SoftwareHandle> sound;
int len;
int pos;
bool eos;
std::list<AUD_Reference<AUD_SoftwareDevice::AUD_SoftwareHandle> > stopSounds;
std::list<AUD_Reference<AUD_SoftwareDevice::AUD_SoftwareHandle> > pauseSounds;
sample_t* buf = m_buffer.getBuffer();
m_mixer->clear(length);
// for all sounds
AUD_HandleIterator it = m_playingSounds.begin();
while(it != m_playingSounds.end())
{
sound = *it;
// increment the iterator to make sure it's valid,
// in case the sound gets deleted after stopping
++it;
// get the buffer from the source
pos = 0;
len = length;
// update 3D Info
sound->update();
sound->m_reader->read(len, eos, buf);
// in case of looping
while(pos + len < length && sound->m_loopcount && eos)
{
m_mixer->mix(buf, pos, len, sound->m_volume);
pos += len;
if(sound->m_loopcount > 0)
sound->m_loopcount--;
sound->m_reader->seek(0);
len = length - pos;
sound->m_reader->read(len, eos, buf);
// prevent endless loop
if(!len)
break;
}
m_mixer->mix(buf, pos, len, sound->m_volume);
// in case the end of the sound is reached
if(eos && !sound->m_loopcount)
{
if(sound->m_stop)
sound->m_stop(sound->m_stop_data);
if(sound->m_keep)
pauseSounds.push_back(sound);
else
stopSounds.push_back(sound);
}
}
// superpose
m_mixer->read(buffer, m_volume);
// cleanup
while(!stopSounds.empty())
{
sound = stopSounds.front();
stopSounds.pop_front();
sound->stop();
}
while(!pauseSounds.empty())
{
sound = pauseSounds.front();
pauseSounds.pop_front();
sound->pause();
}
}
unlock();
}
void AUD_OpenALDevice::updateStreams()
{
AUD_Reference<AUD_OpenALHandle> sound;
int length;
ALint info;
AUD_DeviceSpecs specs = m_specs;
ALCenum cerr;
std::list<AUD_Reference<AUD_OpenALHandle> > stopSounds;
std::list<AUD_Reference<AUD_OpenALHandle> > pauseSounds;
AUD_HandleIterator it;
while(1)
{
lock();
alcSuspendContext(m_context);
cerr = alcGetError(m_device);
if(cerr == ALC_NO_ERROR)
{
// for all sounds
for(it = m_playingSounds.begin(); it != m_playingSounds.end(); it++)
{
sound = *it;
// is it a streamed sound?
if(!sound->m_isBuffered)
{
// check for buffer refilling
alGetSourcei(sound->m_source, AL_BUFFERS_PROCESSED, &info);
if(info)
{
specs.specs = sound->m_reader->getSpecs();
m_buffer.assureSize(m_buffersize * AUD_DEVICE_SAMPLE_SIZE(specs));
// for all empty buffers
while(info--)
{
// if there's still data to play back
if(!sound->m_eos)
{
// read data
length = m_buffersize;
sound->m_reader->read(length, sound->m_eos, m_buffer.getBuffer());
// looping necessary?
if(length == 0 && sound->m_loopcount)
{
if(sound->m_loopcount > 0)
sound->m_loopcount--;
sound->m_reader->seek(0);
length = m_buffersize;
sound->m_reader->read(length, sound->m_eos, m_buffer.getBuffer());
}
if(sound->m_loopcount != 0)
sound->m_eos = false;
// read nothing?
if(length == 0)
{
break;
}
// unqueue buffer
alSourceUnqueueBuffers(sound->m_source, 1,
&sound->m_buffers[sound->m_current]);
ALenum err;
if((err = alGetError()) != AL_NO_ERROR)
{
sound->m_eos = true;
break;
}
// fill with new data
alBufferData(sound->m_buffers[sound->m_current],
sound->m_format,
m_buffer.getBuffer(), length *
AUD_DEVICE_SAMPLE_SIZE(specs),
specs.rate);
if((err = alGetError()) != AL_NO_ERROR)
{
sound->m_eos = true;
break;
}
// and queue again
alSourceQueueBuffers(sound->m_source, 1,
&sound->m_buffers[sound->m_current]);
if(alGetError() != AL_NO_ERROR)
{
sound->m_eos = true;
break;
}
sound->m_current = (sound->m_current+1) %
AUD_OpenALHandle::CYCLE_BUFFERS;
}
else
break;
}
}
}
// check if the sound has been stopped
alGetSourcei(sound->m_source, AL_SOURCE_STATE, &info);
if(info != AL_PLAYING)
{
// if it really stopped
if(sound->m_eos)
{
if(sound->m_stop)
sound->m_stop(sound->m_stop_data);
// pause or
if(sound->m_keep)
pauseSounds.push_back(sound);
// stop
else
stopSounds.push_back(sound);
}
// continue playing
else
alSourcePlay(sound->m_source);
}
}
for(it = pauseSounds.begin(); it != pauseSounds.end(); it++)
(*it)->pause();
for(it = stopSounds.begin(); it != stopSounds.end(); it++)
(*it)->stop();
pauseSounds.clear();
stopSounds.clear();
alcProcessContext(m_context);
}
// stop thread
if(m_playingSounds.empty() || (cerr != ALC_NO_ERROR))
{
m_playing = false;
unlock();
pthread_exit(NULL);
}
unlock();
#ifdef WIN32
Sleep(20);
#else
usleep(20000);
#endif
}
}
