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Rate control adjustment for temporal-svc 1pass.

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-For ambient qp in active_worst setting: increase the initial
averaging time (from very first frame) to account for avg_qp of key_frame.
-In postencode on key frame: update the last_q/avg_q[key_frame] for
all temporal layers.

Change-Id: I5313153d350b1045b4835ce948dfffb7d2039b52
This commit is contained in:
Marco 2015-08-05 15:09:16 -07:00
parent 6b9f046791
commit c54d165014
1 changed files with 14 additions and 1 deletions
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15
vp9/encoder/vp9_ratectrl.c
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@ -635,6 +635,7 @@ static int calc_active_worst_quality_one_pass_cbr(const VP9_COMP *cpi) {
int adjustment = 0;
int active_worst_quality;
int ambient_qp;
unsigned int num_frames_weight_key = 5 * cpi->svc.number_temporal_layers;
if (cm->frame_type == KEY_FRAME)
return rc->worst_quality;
// For ambient_qp we use minimum of avg_frame_qindex[KEY_FRAME/INTER_FRAME]
@ -642,7 +643,7 @@ static int calc_active_worst_quality_one_pass_cbr(const VP9_COMP *cpi) {
// to worst_quality and updated with (3/4, 1/4) average in postencode_update.
// So for first few frames following key, the qp of that key frame is weighted
// into the active_worst_quality setting.
ambient_qp = (cm->current_video_frame < 5) ?
ambient_qp = (cm->current_video_frame < num_frames_weight_key) ?
MIN(rc->avg_frame_qindex[INTER_FRAME], rc->avg_frame_qindex[KEY_FRAME]) :
rc->avg_frame_qindex[INTER_FRAME];
active_worst_quality = MIN(rc->worst_quality,
@ -1286,6 +1287,18 @@ void vp9_rc_postencode_update(VP9_COMP *cpi, uint64_t bytes_used) {
rc->last_q[KEY_FRAME] = qindex;
rc->avg_frame_qindex[KEY_FRAME] =
ROUND_POWER_OF_TWO(3 * rc->avg_frame_qindex[KEY_FRAME] + qindex, 2);
if (cpi->use_svc) {
int i = 0;
SVC *svc = &cpi->svc;
for (i = 0; i < svc->number_temporal_layers; ++i) {
const int layer = LAYER_IDS_TO_IDX(svc->spatial_layer_id, i,
svc->number_temporal_layers);
LAYER_CONTEXT *lc = &svc->layer_context[layer];
RATE_CONTROL *lrc = &lc->rc;
lrc->last_q[KEY_FRAME] = rc->last_q[KEY_FRAME];
lrc->avg_frame_qindex[KEY_FRAME] = rc->avg_frame_qindex[KEY_FRAME];
}
}
} else {
if (rc->is_src_frame_alt_ref ||
!(cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame) ||