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Merge "vp9-svc: Modify logic for frame dropping with spatial layers."

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Marco Paniconi 2018-03-28 21:29:35 +00:00 committed by Gerrit Code Review
commit 382afcab98
1 changed files with 24 additions and 1 deletions
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25
vp9/encoder/vp9_ratectrl.c
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@ -393,6 +393,29 @@ void vp9_rc_init(const VP9EncoderConfig *oxcf, int pass, RATE_CONTROL *rc) {
rc->baseline_gf_interval = (rc->min_gf_interval + rc->max_gf_interval) / 2;
}
static int check_buffer(VP9_COMP *cpi, int drop_mark) {
SVC *svc = &cpi->svc;
if (!cpi->use_svc || !cpi->svc.framedrop_mode) {
RATE_CONTROL *const rc = &cpi->rc;
return (rc->buffer_level <= drop_mark);
} else {
int i;
// For SVC in the constrained framedrop mode (svc->framedrop_mode = 1):
// the condition on buffer (to drop frame) is checked on current and
// upper spatial layers.
for (i = svc->spatial_layer_id; i < svc->number_spatial_layers; ++i) {
const int layer = LAYER_IDS_TO_IDX(i, svc->temporal_layer_id,
svc->number_temporal_layers);
LAYER_CONTEXT *lc = &svc->layer_context[layer];
RATE_CONTROL *lrc = &lc->rc;
const int drop_mark_layer =
(int)(cpi->svc.framedrop_thresh[i] * lrc->optimal_buffer_level / 100);
if (!(lrc->buffer_level <= drop_mark_layer)) return 0;
}
return 1;
}
}
int vp9_rc_drop_frame(VP9_COMP *cpi) {
const VP9EncoderConfig *oxcf = &cpi->oxcf;
RATE_CONTROL *const rc = &cpi->rc;
@ -413,7 +436,7 @@ int vp9_rc_drop_frame(VP9_COMP *cpi) {
(int)(drop_frames_water_mark * rc->optimal_buffer_level / 100);
if ((rc->buffer_level > drop_mark) && (rc->decimation_factor > 0)) {
--rc->decimation_factor;
} else if (rc->buffer_level <= drop_mark && rc->decimation_factor == 0) {
} else if (check_buffer(cpi, drop_mark) && rc->decimation_factor == 0) {
rc->decimation_factor = 1;
}
if (rc->decimation_factor > 0) {