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Update bandwidth adapt algo

This commit is contained in:
Mamadou DIOP 2016-03-07 16:11:32 +01:00
parent 8dbf270434
commit ad05fdc30b
1 changed files with 28 additions and 7 deletions
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35
tinyDAV/src/video/tdav_session_video.c
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@ -1430,7 +1430,8 @@ static int _tdav_session_video_timer_cb(const void* arg, tsk_timer_id_t timer_id
uint64_t bw_est_kbps;
tsk_bool_t cavgneg, update_qavg = tsk_false, update_size = tsk_false;
unsigned enc_avg_time;
int32_t bw_up_base_kbps, bw_up_ref_kbps;
tsk_mutex_lock(video->h_mutex_qos);
q1 = video->q1_n ? session->qos_metrics.q1 : 1.f;
q2 = video->q2_n ? session->qos_metrics.q2 : 1.f;
@ -1527,8 +1528,7 @@ static int _tdav_session_video_timer_cb(const void* arg, tsk_timer_id_t timer_id
cavg = (qavg - session->qos_metrics.qvag);
cavgneg = cavg < 0.f ? tsk_true : tsk_false;
cavg = cavg < 0.f ? -cavg : +cavg;
TSK_DEBUG_INFO("_tdav_session_video_timer_cb: q1=%f, q2=%f, q3=%f, q4=%f, q5=%f, qavg=%f, qavg_lowest=%f cavg=%f cavgneg=%d congestion_ctrl_enabled=true", q1, q2, q3, q4, q5, qavg, video->qavg_lowest, cavg, cavgneg);
TSK_DEBUG_INFO("_tdav_session_video_timer_cb: q1=%f, q2=%f, q3=%f, q4=%f, q5=%f, qavg=%f, qavg_lowest=%f cavg=%f cavgneg=%d congestion_ctrl_enabled=true", q1, q2, q3, q4, q5, qavg, video->qavg_lowest, cavg, cavgneg);
if (cavgneg) { /* Quality is down */
++video->num_qavg_down;
@ -1549,12 +1549,33 @@ static int _tdav_session_video_timer_cb(const void* arg, tsk_timer_id_t timer_id
update_qavg = (cavg > 0.1f);
}
bw_up_base_kbps = tmedia_get_video_bandwidth_kbps_2(codec->out.width, codec->out.height, codec->out.fps);
bw_up_ref_kbps = TMEDIA_CODEC(codec)->bandwidth_max_upload;
if (bw_up_ref_kbps < 0 || bw_up_ref_kbps == INT_MAX) {
bw_up_ref_kbps = tmedia_get_video_bandwidth_kbps_2(codec->out.width, codec->out.height, codec->out.fps);
}
// Unconditionally decrease the bandwidth when the quality is < 90%
// bandwidth will decrease regardless qavg value as the ref. value is recursive
update_qavg |= (qavg < 0.9f);
// Also update the bandwidth when quality is > 90% and saved qvag is < 90% or ref bw is < base bw
update_qavg |= (qavg > 0.9f && (session->qos_metrics.qvag < 0.9f || bw_up_ref_kbps < bw_up_base_kbps));
if (update_qavg) {
// Update the upload bandwidth
int32_t bw_up_new_kbps, bw_up_base_kbps = base->bandwidth_max_upload_kbps; // user-defined maximum
bw_up_base_kbps = TSK_MIN(tmedia_get_video_bandwidth_kbps_2(codec->out.width, codec->out.height, codec->out.fps), bw_up_base_kbps);
bw_up_new_kbps = (int32_t)(bw_up_base_kbps * qavg);
TSK_DEBUG_INFO("Video quality change(%d%%), changing bw_up from base=%dkbps to new=%dkbps", (int)(cavg*100), bw_up_base_kbps, bw_up_new_kbps);
int32_t bw_up_new_kbps, bw_up_max_kbps = base->bandwidth_max_upload_kbps; // user-defined maximum
// When the qavg is within ]90-100]% we increase the ref. bw
if (qavg > 0.9f) {
bw_up_ref_kbps += (int32_t)((bw_up_base_kbps - bw_up_ref_kbps) * 0.1f);
bw_up_ref_kbps = TSK_CLAMP(5, bw_up_ref_kbps, bw_up_base_kbps);
bw_up_new_kbps = bw_up_ref_kbps;
}
else {
bw_up_ref_kbps = TSK_CLAMP(5, bw_up_ref_kbps, bw_up_max_kbps);
bw_up_new_kbps = (int32_t)(bw_up_ref_kbps * qavg);
}
TSK_DEBUG_INFO("Video quality change(%d%%), changing bw_up from ref=%dkbps to new=%dkbps", (int)(cavg*100), bw_up_ref_kbps, bw_up_new_kbps);
_tdav_session_video_bw_kbps(video, bw_up_new_kbps);
session->qos_metrics.qvag = qavg;
}