PJ_DEF(pj_status_t) pjmedia_jbuf_create(pj_pool_t *pool,
const pj_str_t *name,
unsigned frame_size,
unsigned ptime,
unsigned max_count,
pjmedia_jbuf **p_jb)
{
pjmedia_jbuf *jb;
pj_status_t status;
jb = PJ_POOL_ZALLOC_T(pool, pjmedia_jbuf);
status = jb_framelist_init(pool, &jb->jb_framelist, frame_size, max_count);
if (status != PJ_SUCCESS)
return status;
pj_strdup_with_null(pool, &jb->jb_name, name);
jb->jb_frame_size = frame_size;
jb->jb_frame_ptime = ptime;
jb->jb_prefetch = PJ_MIN(PJMEDIA_JB_DEFAULT_INIT_DELAY,max_count*4/5);
jb->jb_min_prefetch = 0;
jb->jb_max_prefetch = max_count*4/5;
jb->jb_max_count = max_count;
jb->jb_min_shrink_gap= PJMEDIA_JBUF_DISC_MIN_GAP / ptime;
jb->jb_max_burst = PJ_MAX(MAX_BURST_MSEC / ptime, max_count*3/4);
pj_math_stat_init(&jb->jb_delay);
pj_math_stat_init(&jb->jb_burst);
pjmedia_jbuf_set_discard(jb, PJMEDIA_JB_DISCARD_PROGRESSIVE);
pjmedia_jbuf_reset(jb);
*p_jb = jb;
return PJ_SUCCESS;
}
/*
* Set the jitter buffer to fixed delay mode. The default behavior
* is to adapt the delay with actual packet delay.
*
*/
PJ_DEF(pj_status_t) pjmedia_jbuf_set_fixed( pjmedia_jbuf *jb,
unsigned prefetch)
{
PJ_ASSERT_RETURN(jb, PJ_EINVAL);
PJ_ASSERT_RETURN(prefetch <= jb->jb_max_count, PJ_EINVAL);
jb->jb_min_prefetch = jb->jb_max_prefetch =
jb->jb_prefetch = jb->jb_init_prefetch = prefetch;
pjmedia_jbuf_set_discard(jb, PJMEDIA_JB_DISCARD_NONE);
return PJ_SUCCESS;
}
