static void play_packet(struct ausrc_st *st)
{
int16_t buf[st->sampc];
/* timed read from audio-buffer */
if (aubuf_get_samp(st->aubuf, st->prm.ptime, buf, st->sampc))
return;
/* call read handler */
if (st->rh)
st->rh(buf, st->sampc, st->arg);
}
/*
* @note This function has REAL-TIME properties
*/
static void poll_aubuf_tx(struct audio *a)
{
size_t sampc = a->tx.psize / 2;
struct autx *tx = &a->tx;
int16_t *sampv = tx->sampv;
struct le *le;
int err = 0;
/* timed read from audio-buffer */
if (aubuf_get_samp(tx->ab, tx->ptime, tx->sampv, sampc))
return;
/* optional resampler */
if (tx->resamp) {
size_t sampc_rs = AUDIO_SAMPSZ;
err = auresamp_process(tx->resamp,
tx->sampv_rs, &sampc_rs,
tx->sampv, sampc);
if (err)
return;
sampv = tx->sampv_rs;
sampc = sampc_rs;
}
/* Process exactly one audio-frame in list order */
for (le = a->filtl.head; le; le = le->next) {
struct aufilt_st *st = le->data;
if (st->af->ench)
err |= st->af->ench(st, sampv, &sampc);
}
/* Encode and send */
encode_rtp_send(a, tx, sampv, sampc);
}