static DWORD WINAPI SoundThread(LPVOID arg)
{
do {
for (WAVEHDR *hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) {
if ((hdr->dwFlags & WHDR_INQUEUE) != 0) continue;
MxMixSamples(hdr->lpData, hdr->dwBufferLength / 4);
if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) {
MessageBox(NULL, _T("Sounds are disabled until restart."), _T("waveOutWrite failed"), MB_ICONINFORMATION);
return 0;
}
}
WaitForSingleObject(_event, INFINITE);
} while (_waveout != NULL);
return 0;
}
void SoundDriver_Allegro::MainLoop()
{
/* We haven't opened a stream yet */
if (_stream == NULL) return;
void *data = get_audio_stream_buffer(_stream);
/* We don't have to fill the stream yet */
if (data == NULL) return;
/* Mix the samples */
MxMixSamples(data, _buffer_size);
/* Allegro sound is always unsigned, so we need to correct that */
uint16 *snd = (uint16*)data;
for (int i = 0; i < _buffer_size * 2; i++) snd[i] ^= 0x8000;
/* Tell we've filled the stream */
free_audio_stream_buffer(_stream);
}
static void CDECL fill_sound_buffer(void *userdata, Uint8 *stream, int len)
{
MxMixSamples(stream, len / 4);
}