/* alsa_update:
* Updates main buffer in case ALSA is ready.
*/
static void alsa_update(int threaded)
{
unsigned short revents;
if (poll_next) {
poll(ufds, pdc, 0);
snd_pcm_poll_descriptors_revents(pcm_handle, ufds, pdc, &revents);
if (revents & POLLERR) {
if (snd_pcm_state(pcm_handle) == SND_PCM_STATE_XRUN ||
snd_pcm_state(pcm_handle) == SND_PCM_STATE_SUSPENDED) {
int err = snd_pcm_state(pcm_handle) == SND_PCM_STATE_XRUN ? -EPIPE : -ESTRPIPE;
if (xrun_recovery(pcm_handle, err) < 0) {
fprintf(stderr, "Write error: %s\n", snd_strerror(err));
}
poll_next = 0;
}
else {
fprintf(stderr, "Wait for poll failed\n");
}
return;
}
if (!(revents & POLLOUT))
return;
}
alsa_mix();
}
static int mixmaster(jack_nframes_t nframes, void *arg) {
sample_t *outs[QMX_CHANNELS], *ch;
size_t n, i;
if (use_jack && need_init_guile) {
scm_init_guile();
need_init_guile = 0;
}
for (n = 0; n < QMX_CHANNELS; n++) {
// zero the mix buffers
if (use_jack)
ch = outs[n] = jack_port_get_buffer(jack_cauldron[n], nframes);
else ch = outs[n] = fixed_cauldron + n * nframes;
for (i = 0; i < nframes; i++) ch[i] = 0.0;
}
// mix from sources
alsa_mix(nframes, outs);
audio_files_mix(nframes, outs);
feeds_mix(nframes, outs);
if (use_jack) jack_ports_mix(nframes, outs);
unit_gens_mix(nframes, outs);
// process mix; e.g. fade
run_filter(fader, nframes, outs, outs, 0);
// deliver mix
buffer_out(nframes, outs);
record(nframes, outs);
return 0;
}
