static bool dsound_start(void *data)
{
dsound_t *ds = (dsound_t*)data;
dsound_clear_buffer(ds);
if (!dsound_start_thread(ds))
return false;
return IDirectSoundBuffer_Play(ds->dsb, 0, 0, DSBPLAY_LOOPING) == DS_OK;
}
static bool dsound_start(void *data, bool is_shutdown)
{
dsound_t *ds = (dsound_t*)data;
dsound_clear_buffer(ds);
if (!dsound_start_thread(ds))
return false;
ds->is_paused = (IDirectSoundBuffer_Play(
ds->dsb, 0, 0, DSBPLAY_LOOPING) == DS_OK) ? false : true;
return (ds->is_paused) ? false : true;
}
static void *dsound_init(const char *device, unsigned rate, unsigned latency)
{
WAVEFORMATEX wfx = {0};
DSBUFFERDESC bufdesc = {0};
struct dsound_dev dev = {0};
dsound_t *ds = (dsound_t*)calloc(1, sizeof(*ds));
if (!ds)
goto error;
InitializeCriticalSection(&ds->crit);
if (device)
dev.device = strtoul(device, NULL, 0);
RARCH_LOG("DirectSound devices:\n");
#ifndef _XBOX
DirectSoundEnumerate(enumerate_cb, &dev);
#endif
if (DirectSoundCreate(dev.guid, &ds->ds, NULL) != DS_OK)
goto error;
#ifndef _XBOX
if (IDirectSound_SetCooperativeLevel(ds->ds, GetDesktopWindow(), DSSCL_PRIORITY) != DS_OK)
goto error;
#endif
wfx.wFormatTag = WAVE_FORMAT_PCM;
wfx.nChannels = 2;
wfx.nSamplesPerSec = rate;
wfx.wBitsPerSample = 16;
wfx.nBlockAlign = 2 * sizeof(int16_t);
wfx.nAvgBytesPerSec = rate * 2 * sizeof(int16_t);
ds->buffer_size = (latency * wfx.nAvgBytesPerSec) / 1000;
ds->buffer_size /= CHUNK_SIZE;
ds->buffer_size *= CHUNK_SIZE;
if (ds->buffer_size < 4 * CHUNK_SIZE)
ds->buffer_size = 4 * CHUNK_SIZE;
RARCH_LOG("[DirectSound]: Setting buffer size of %u bytes\n", ds->buffer_size);
RARCH_LOG("[DirectSound]: Latency = %u ms\n", (unsigned)((1000 * ds->buffer_size) / wfx.nAvgBytesPerSec));
bufdesc.dwSize = sizeof(DSBUFFERDESC);
bufdesc.dwFlags = 0;
#ifndef _XBOX
bufdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_GLOBALFOCUS;
#endif
bufdesc.dwBufferBytes = ds->buffer_size;
bufdesc.lpwfxFormat = &wfx;
ds->event = CreateEvent(NULL, false, false, NULL);
if (!ds->event)
goto error;
ds->buffer = fifo_new(4 * 1024);
if (!ds->buffer)
goto error;
if (IDirectSound_CreateSoundBuffer(ds->ds, &bufdesc, &ds->dsb, 0) != DS_OK)
goto error;
IDirectSoundBuffer_SetVolume(ds->dsb, DSBVOLUME_MAX);
IDirectSoundBuffer_SetCurrentPosition(ds->dsb, 0);
dsound_clear_buffer(ds);
if (IDirectSoundBuffer_Play(ds->dsb, 0, 0, DSBPLAY_LOOPING) != DS_OK)
goto error;
if (!dsound_start_thread(ds))
goto error;
return ds;
error:
RARCH_ERR("[DirectSound] Error occured in init.\n");
dsound_free(ds);
return NULL;
}