/**
* Allocate an Audio Source state
*
* @param stp Pointer to allocated Audio Source state
* @param ausrcl List of Audio Sources
* @param ctx Media context (optional)
* @param name Name of Audio Source
* @param prm Audio Source parameters
* @param device Name of Audio Source device (driver specific)
* @param rh Read handler
* @param errh Error handler
* @param arg Handler argument
*
* @return 0 if success, otherwise errorcode
*/
int ausrc_alloc(struct ausrc_st **stp, struct list *ausrcl,
struct media_ctx **ctx,
const char *name, struct ausrc_prm *prm, const char *device,
ausrc_read_h *rh, ausrc_error_h *errh, void *arg)
{
struct ausrc *as;
as = (struct ausrc *)ausrc_find(ausrcl, name);
if (!as)
return ENOENT;
return as->alloch(stp, as, ctx, prm, device, rh, errh, arg);
}
static int start_source(struct autx *tx, struct audio *a)
{
const struct aucodec *ac = tx->ac;
uint32_t srate_dsp = get_srate(tx->ac);
int err;
if (!ac)
return 0;
/* Optional resampler, if configured */
if (a->cfg.srate_src && a->cfg.srate_src != srate_dsp &&
!tx->resamp) {
srate_dsp = a->cfg.srate_src;
(void)re_printf("enable ausrc resampler: %u --> %u Hz\n",
get_srate(ac), srate_dsp);
tx->sampv_rs = mem_zalloc(AUDIO_SAMPSZ * 2, NULL);
if (!tx->sampv_rs)
return ENOMEM;
err = auresamp_alloc(&tx->resamp, AUDIO_SAMPSZ,
srate_dsp, ac->ch,
get_srate(ac), ac->ch);
if (err)
return err;
}
/* Start Audio Source */
if (!tx->ausrc && ausrc_find(NULL)) {
struct ausrc_prm prm;
prm.fmt = AUFMT_S16LE;
prm.srate = srate_dsp;
prm.ch = ac->ch;
prm.frame_size = calc_nsamp(prm.srate, prm.ch, tx->ptime);
tx->psize = 2 * prm.frame_size;
if (!tx->ab) {
err = aubuf_alloc(&tx->ab, tx->psize * 2,
tx->psize * 30);
if (err)
return err;
}
err = ausrc_alloc(&tx->ausrc, NULL, a->cfg.src_mod,
&prm, a->cfg.src_dev,
ausrc_read_handler, ausrc_error_handler, a);
if (err) {
DEBUG_WARNING("start_source failed: %m\n", err);
return err;
}
switch (a->cfg.txmode) {
#ifdef HAVE_PTHREAD
case AUDIO_MODE_THREAD:
case AUDIO_MODE_THREAD_REALTIME:
if (!tx->u.thr.run) {
tx->u.thr.run = true;
err = pthread_create(&tx->u.thr.tid, NULL,
tx_thread, a);
if (err) {
tx->u.thr.tid = false;
return err;
}
}
break;
#endif
case AUDIO_MODE_TMR:
tmr_start(&tx->u.tmr, 1, timeout_tx, a);
break;
default:
break;
}
}
return 0;
}
static int start_source(struct autx *tx, struct audio *a)
{
const struct aucodec *ac = tx->ac;
uint32_t srate_dsp = get_srate(ac);
uint32_t channels_dsp;
bool resamp = false;
int err;
if (!ac)
return 0;
channels_dsp = ac->ch;
if (a->cfg.srate_src && a->cfg.srate_src != srate_dsp) {
resamp = true;
srate_dsp = a->cfg.srate_src;
}
if (a->cfg.channels_src && a->cfg.channels_src != channels_dsp) {
resamp = true;
channels_dsp = a->cfg.channels_src;
}
/* Optional resampler, if configured */
if (resamp && !tx->sampv_rs) {
info("audio: enable ausrc resampler:"
" %uHz/%uch <-- %uHz/%uch\n",
get_srate(ac), ac->ch, srate_dsp, channels_dsp);
tx->sampv_rs = mem_zalloc(AUDIO_SAMPSZ * 2, NULL);
if (!tx->sampv_rs)
return ENOMEM;
err = auresamp_setup(&tx->resamp,
srate_dsp, channels_dsp,
get_srate(ac), ac->ch);
if (err) {
warning("audio: could not setup ausrc resampler"
" (%m)\n", err);
return err;
}
}
/* Start Audio Source */
if (!tx->ausrc && ausrc_find(NULL)) {
struct ausrc_prm prm;
prm.srate = srate_dsp;
prm.ch = channels_dsp;
prm.ptime = tx->ptime;
tx->psize = 2 * calc_nsamp(prm.srate, prm.ch, prm.ptime);
if (!tx->aubuf) {
err = aubuf_alloc(&tx->aubuf, tx->psize * 2,
tx->psize * 30);
if (err)
return err;
}
err = ausrc_alloc(&tx->ausrc, NULL, a->cfg.src_mod,
&prm, tx->device,
ausrc_read_handler, ausrc_error_handler, a);
if (err) {
warning("audio: start_source failed (%s.%s): %m\n",
a->cfg.src_mod, tx->device, err);
return err;
}
switch (a->cfg.txmode) {
#ifdef HAVE_PTHREAD
case AUDIO_MODE_THREAD:
case AUDIO_MODE_THREAD_REALTIME:
if (!tx->u.thr.run) {
tx->u.thr.run = true;
err = pthread_create(&tx->u.thr.tid, NULL,
tx_thread, a);
if (err) {
tx->u.thr.tid = false;
return err;
}
}
break;
#endif
case AUDIO_MODE_TMR:
tmr_start(&tx->u.tmr, 1, timeout_tx, a);
break;
default:
break;
}
}
return 0;
}