Ejemplo n.º 1
0
static void ALSA_MMap_Submit (soundcardinfo_t *sc, int start, int end)
{
	int			state;
	int			count = end - start;
	const snd_pcm_channel_area_t *areas;
	snd_pcm_uframes_t nframes;
	snd_pcm_uframes_t offset;

	nframes = count / sc->sn.numchannels;

	psnd_pcm_avail_update (sc->handle);
	psnd_pcm_mmap_begin (sc->handle, &areas, &offset, &nframes);

	state = psnd_pcm_state (sc->handle);

	switch (state) {
		case SND_PCM_STATE_PREPARED:
			psnd_pcm_mmap_commit (sc->handle, offset, nframes);
			psnd_pcm_start (sc->handle);
			break;
		case SND_PCM_STATE_RUNNING:
			psnd_pcm_mmap_commit (sc->handle, offset, nframes);
			break;
		default:
			break;
	}
}
Ejemplo n.º 2
0
static int verify_state(snd_pcm_t *handle)
{
    snd_pcm_state_t state = psnd_pcm_state(handle);
    if(state == SND_PCM_STATE_DISCONNECTED)
        return -ENODEV;
    if(state == SND_PCM_STATE_XRUN)
    {
        int err = xrun_recovery(handle, -EPIPE);
        if(err < 0) return err;
    }
    else if(state == SND_PCM_STATE_SUSPENDED)
    {
        int err = xrun_recovery(handle, -ESTRPIPE);
        if(err < 0) return err;
    }

    return state;
}