int CAudioMixer::pullAudio( AUDIO_SAMPLE_TYPE *target, int bufferLength ) {
if (!m_sourceList) return 0;
m_mutex.lock();
if (m_mixingBufferLength<bufferLength) {
if (m_mixingBuffer) delete [] m_mixingBuffer;
m_mixingBufferLength = bufferLength;
m_mixingBuffer = new AUDIO_SAMPLE_TYPE[ m_mixingBufferLength ];
};
memset( target, 0, sizeof( AUDIO_SAMPLE_TYPE ) * bufferLength );
AUDIO_SAMPLE_TYPE *t;
AUDIO_SAMPLE_TYPE *t_target;
AUDIO_SAMPLE_TYPE *s;
IAudioSource *prev = 0;
IAudioSource *l = m_sourceList;
while (l) {
IAudioSource *next = l->m_next;
// process l
int mixed = l->pullAudio( m_mixingBuffer, bufferLength );
if (mixed>0) {
// mix to main..
t = target;
t_target = t+mixed;
s = m_mixingBuffer;
while (t!=t_target) {
*t +=(((*s)*m_fixedGeneralVolume)>>12);
t++;
s++;
};
};
// autodestroy
if (l->canBeDestroyed() == true) { // NOTE, IS UNDER TESTING,... MIGHT CAUSE UNPREDICTABLE CRASHING WITH SOME USE CASES!!!
if (!prev)
m_sourceList = next;
else prev->m_next = next;
delete l;
l = 0;
};
prev = l;
l = next;
};
