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Some updates and fixes for layered CBR mode.

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-Properly set the average frame size for each layer.

-Allow each layer to update its average/last Q stats after encoding.

-Initialize for some layer context variables.

Change-Id: Iaa37d144fcf4f30ff4283a4e8db8b9ca8bf4c815
This commit is contained in:
Marco Paniconi 2014-02-07 14:25:27 -08:00
parent 7c8a66664c
commit 812bacc919
4 changed files with 39 additions and 11 deletions
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5
test/datarate_test.cc
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@ -493,7 +493,10 @@ TEST_P(DatarateTestVP9, BasicRateTargeting3TemporalLayers) {
cfg_.rc_buf_initial_sz = 500;
cfg_.rc_buf_optimal_sz = 500;
cfg_.rc_buf_sz = 1000;
cfg_.rc_dropframe_thresh = 1;
// TODO(marpan): For now keep frame dropper off. Need to investigate an
// issue (rate-mismatch) that occcurs at speed 3 and low bitrate (200k) when
// frame dropper is on.
cfg_.rc_dropframe_thresh = 0;
cfg_.rc_min_quantizer = 0;
cfg_.rc_max_quantizer = 63;
cfg_.rc_end_usage = VPX_CBR;

26
vp9/encoder/vp9_onyx_if.c
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@ -1155,14 +1155,17 @@ static void init_layer_context(VP9_COMP *const cpi) {
LAYER_CONTEXT *const lc = &cpi->svc.layer_context[temporal_layer];
RATE_CONTROL *const lrc = &lc->rc;
lrc->active_worst_quality = q_trans[oxcf->worst_allowed_q];
lrc->avg_frame_qindex[INTER_FRAME] = q_trans[oxcf->worst_allowed_q];
lrc->last_q[INTER_FRAME] = q_trans[oxcf->worst_allowed_q];
lrc->avg_frame_qindex[INTER_FRAME] = lrc->active_worst_quality;
lrc->last_q[INTER_FRAME] = lrc->active_worst_quality;
lrc->ni_av_qi = lrc->active_worst_quality;
lrc->total_actual_bits = 0;
lrc->total_target_vs_actual = 0;
lrc->ni_tot_qi = 0;
lrc->tot_q = 0.0;
lrc->avg_q = 0.0;
lrc->ni_frames = 0;
lrc->decimation_count = 0;
lrc->decimation_factor = 0;
lrc->rate_correction_factor = 1.0;
lrc->key_frame_rate_correction_factor = 1.0;
lc->target_bandwidth = oxcf->ts_target_bitrate[temporal_layer] *
@ -1207,13 +1210,24 @@ static void update_layer_context_change_config(VP9_COMP *const cpi,
// for the current layer.
static void update_layer_framerate(VP9_COMP *const cpi) {
int temporal_layer = cpi->svc.temporal_layer_id;
const VP9_CONFIG *const oxcf = &cpi->oxcf;
LAYER_CONTEXT *const lc = &cpi->svc.layer_context[temporal_layer];
RATE_CONTROL *const lrc = &lc->rc;
lc->framerate = cpi->oxcf.framerate /
cpi->oxcf.ts_rate_decimator[temporal_layer];
lrc->av_per_frame_bandwidth = (int)(lc->target_bandwidth /
lc->framerate);
lc->framerate = oxcf->framerate / oxcf->ts_rate_decimator[temporal_layer];
lrc->av_per_frame_bandwidth = (int)(lc->target_bandwidth / lc->framerate);
lrc->max_frame_bandwidth = cpi->rc.max_frame_bandwidth;
// Update the average layer frame size (non-cumulative per-frame-bw).
if (temporal_layer == 0) {
lc->avg_frame_size = lrc->av_per_frame_bandwidth;
} else {
double prev_layer_framerate = oxcf->framerate /
oxcf->ts_rate_decimator[temporal_layer - 1];
int prev_layer_target_bandwidth =
oxcf->ts_target_bitrate[temporal_layer - 1] * 1000;
lc->avg_frame_size =
(int)(lc->target_bandwidth - prev_layer_target_bandwidth) /
(lc->framerate - prev_layer_framerate);
}
}
// Prior to encoding the frame, set the layer context, for the current layer

1
vp9/encoder/vp9_onyx_int.h
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@ -401,6 +401,7 @@ typedef struct {
int64_t optimal_buffer_level;
int64_t maximum_buffer_size;
double framerate;
int avg_frame_size;
} LAYER_CONTEXT;
typedef struct VP9_COMP {

18
vp9/encoder/vp9_ratectrl.c
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@ -973,7 +973,8 @@ void vp9_rc_postencode_update(VP9_COMP *cpi, uint64_t bytes_used) {
rc->avg_frame_qindex[KEY_FRAME] = ROUND_POWER_OF_TWO(
3 * rc->avg_frame_qindex[KEY_FRAME] + cm->base_qindex, 2);
} else if (!rc->is_src_frame_alt_ref &&
(cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)) {
(cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame) &&
!(cpi->use_svc && cpi->oxcf.end_usage == USAGE_STREAM_FROM_SERVER)) {
rc->last_q[2] = cm->base_qindex;
rc->avg_frame_qindex[2] = ROUND_POWER_OF_TWO(
3 * rc->avg_frame_qindex[2] + cm->base_qindex, 2);
@ -1175,11 +1176,20 @@ static int calc_active_worst_quality_one_pass_cbr(const VP9_COMP *cpi) {
static int calc_pframe_target_size_one_pass_cbr(const VP9_COMP *cpi) {
const VP9_CONFIG *oxcf = &cpi->oxcf;
const RATE_CONTROL *rc = &cpi->rc;
int target = rc->av_per_frame_bandwidth;
const int min_frame_target = MAX(rc->av_per_frame_bandwidth >> 4,
FRAME_OVERHEAD_BITS);
const int64_t diff = oxcf->optimal_buffer_level - rc->buffer_level;
const int one_pct_bits = 1 + oxcf->optimal_buffer_level / 100;
int min_frame_target = MAX(rc->av_per_frame_bandwidth >> 4,
FRAME_OVERHEAD_BITS);
int target = rc->av_per_frame_bandwidth;
if (cpi->use_svc && cpi->oxcf.end_usage == USAGE_STREAM_FROM_SERVER) {
// Note that for layers, av_per_frame_bandwidth is the cumulative
// per-frame-bandwidth. For the target size of this frame, use the
// layer average frame size (i.e., non-cumulative per-frame-bw).
int current_temporal_layer = cpi->svc.temporal_layer_id;
const LAYER_CONTEXT *lc = &cpi->svc.layer_context[current_temporal_layer];
target = lc->avg_frame_size;
min_frame_target = MAX(lc->avg_frame_size >> 4, FRAME_OVERHEAD_BITS);
}
if (diff > 0) {
// Lower the target bandwidth for this frame.
const int pct_low = MIN(diff / one_pct_bits, oxcf->under_shoot_pct);