void Foliage::SoundManager::SDL_Audio_Callback(void *userdata, Uint8 *stream, Sint32 len)
{
if (len != (_audioSpec.samples * 4))
{
std::cout << "Invalid audio callback buffer length: " << len << std::endl;
return;
}
Uint32 sample_sfx, sample_bg, sample_mixed;
Uint32 *buf = (Uint32 *)stream;
for (Sint32 i = 0; i < _audioSpec.samples; i++)
{
sample_bg = (_bg != NULL) ? _bg->getNextSample() : 0;
sample_sfx = (_sfx != NULL) ? _sfx->getNextSample() : 0;
sample_mixed = mixSamples(sample_bg, sample_sfx);
*(buf++) = sample_mixed;
}
if (_bg != NULL && _bg->ended())
{
_bg = NULL;
}
if (_sfx != NULL && _sfx->ended())
{
_sfx = NULL;
}
}
void SfxPlayer::readSamples(int8_t *buf, int len) {
if (_delay == 0) {
memset(buf, 0, len * 2);
} else {
int8_t bufin[len * 2];
mixSamples(bufin, len);
nr(bufin, len, buf);
}
}
void Foliage::SoundManager::AC97_Callback(void *useless)
{
Uint32 sample_sfx, sample_bg, sample_mixed;
for (Sint32 i = 0; i < 256; i++)
{
sample_bg = (_bg != NULL) ? _bg->getNextSample() : 0;
sample_sfx = (_sfx != NULL) ? _sfx->getNextSample() : 0;
sample_mixed = mixSamples(sample_bg, sample_sfx);
XAC97_WriteFifo(XPAR_AUDIO_CODEC_BASEADDR, sample_mixed);
}
if (_bg != NULL && _bg->ended())
{
_bg = NULL;
}
if (_sfx != NULL && _sfx->ended())
{
_sfx = NULL;
}
}
