/**
* Write samples to Audio Player.
*
* @note This function has REAL-TIME properties
*
* @note The application is responsible for filling in silence in
* the case of underrun
*
* @note This function may be called from any thread
*
* @return true for valid audio samples, false for silence
*/
static bool auplay_write_handler(uint8_t *buf, size_t sz, void *arg)
{
struct aurx *rx = arg;
aubuf_read(rx->ab, buf, sz);
return true;
}
static void write_handler(void *sampv, size_t sampc, void *arg)
{
struct audio_loop *al = arg;
size_t num_bytes = sampc * aufmt_sample_size(al->fmt);
al->n_write += sampc;
/* read from beginning */
aubuf_read(al->aubuf, sampv, num_bytes);
}
static bool write_handler(uint8_t *buf, size_t sz, void *arg)
{
struct audio_loop *al = arg;
++al->n_write;
/* read from beginning */
if (al->ac) {
(void)codec_read(al, buf, sz);
}
else {
aubuf_read(al->ab, buf, sz);
}
return true;
}
static void *play_thread(void *arg)
{
uint64_t now, ts = tmr_jiffies();
struct ausrc_st *st = arg;
void *sampv;
size_t num_bytes = st->sampc * st->sampsz;
sampv = mem_alloc(num_bytes, NULL);
if (!sampv)
return NULL;
while (st->run) {
sys_msleep(4);
now = tmr_jiffies();
if (ts > now)
continue;
#if 1
if (now > ts + 100) {
debug("rst: cpu lagging behind (%u ms)\n",
now - ts);
}
#endif
aubuf_read(st->aubuf, sampv, num_bytes);
st->rh(sampv, st->sampc, st->arg);
ts += st->ptime;
}
mem_deref(sampv);
return NULL;
}
