ref: e8b818b581b9ab7e9c8f7b1becd753dd4efbdf43
dir: /vp9/ratectrl_rtc.cc/
/*
* Copyright (c) 2020 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vp9/ratectrl_rtc.h"
#include <new>
#include "vp9/encoder/vp9_encoder.h"
#include "vp9/encoder/vp9_picklpf.h"
#include "vpx/vp8cx.h"
#include "vpx/vpx_codec.h"
namespace libvpx {
std::unique_ptr<VP9RateControlRTC> VP9RateControlRTC::Create(
const VP9RateControlRtcConfig &cfg) {
std::unique_ptr<VP9RateControlRTC> rc_api(new (std::nothrow)
VP9RateControlRTC());
if (!rc_api) return nullptr;
rc_api->cpi_ = static_cast<VP9_COMP *>(vpx_memalign(32, sizeof(*cpi_)));
if (rc_api->cpi_ == nullptr) {
return nullptr;
}
rc_api->InitRateControl(cfg);
return rc_api;
}
void VP9RateControlRTC::InitRateControl(const VP9RateControlRtcConfig &rc_cfg) {
VP9_COMMON *cm = &cpi_->common;
VP9EncoderConfig *oxcf = &cpi_->oxcf;
RATE_CONTROL *const rc = &cpi_->rc;
cm->profile = PROFILE_0;
cm->bit_depth = VPX_BITS_8;
cm->show_frame = 1;
oxcf->rc_mode = VPX_CBR;
oxcf->pass = 0;
oxcf->aq_mode = NO_AQ;
oxcf->content = VP9E_CONTENT_DEFAULT;
oxcf->drop_frames_water_mark = 0;
UpdateRateControl(rc_cfg);
cpi_->use_svc = (cpi_->svc.number_spatial_layers > 1 ||
cpi_->svc.number_temporal_layers > 1)
? 1
: 0;
rc->rc_1_frame = 0;
rc->rc_2_frame = 0;
vp9_rc_init_minq_luts();
vp9_rc_init(oxcf, 0, rc);
cpi_->sf.use_nonrd_pick_mode = 1;
cm->current_video_frame = 0;
}
void VP9RateControlRTC::UpdateRateControl(
const VP9RateControlRtcConfig &rc_cfg) {
VP9_COMMON *cm = &cpi_->common;
VP9EncoderConfig *oxcf = &cpi_->oxcf;
RATE_CONTROL *const rc = &cpi_->rc;
cm->width = rc_cfg.width;
cm->height = rc_cfg.height;
oxcf->width = rc_cfg.width;
oxcf->height = rc_cfg.height;
oxcf->worst_allowed_q = vp9_quantizer_to_qindex(rc_cfg.max_quantizer);
oxcf->best_allowed_q = vp9_quantizer_to_qindex(rc_cfg.min_quantizer);
rc->worst_quality = oxcf->worst_allowed_q;
rc->best_quality = oxcf->best_allowed_q;
oxcf->target_bandwidth = 1000 * rc_cfg.target_bandwidth;
oxcf->starting_buffer_level_ms = rc_cfg.buf_initial_sz;
oxcf->optimal_buffer_level_ms = rc_cfg.buf_optimal_sz;
oxcf->maximum_buffer_size_ms = rc_cfg.buf_sz;
oxcf->under_shoot_pct = rc_cfg.undershoot_pct;
oxcf->over_shoot_pct = rc_cfg.overshoot_pct;
oxcf->ss_number_layers = rc_cfg.ss_number_layers;
oxcf->ts_number_layers = rc_cfg.ts_number_layers;
oxcf->temporal_layering_mode = (VP9E_TEMPORAL_LAYERING_MODE)(
(rc_cfg.ts_number_layers > 1) ? rc_cfg.ts_number_layers : 0);
cpi_->oxcf.rc_max_intra_bitrate_pct = rc_cfg.max_intra_bitrate_pct;
cpi_->framerate = rc_cfg.framerate;
cpi_->svc.number_spatial_layers = rc_cfg.ss_number_layers;
cpi_->svc.number_temporal_layers = rc_cfg.ts_number_layers;
for (int sl = 0; sl < cpi_->svc.number_spatial_layers; ++sl) {
for (int tl = 0; tl < cpi_->svc.number_temporal_layers; ++tl) {
const int layer =
LAYER_IDS_TO_IDX(sl, tl, cpi_->svc.number_temporal_layers);
LAYER_CONTEXT *lc = &cpi_->svc.layer_context[layer];
RATE_CONTROL *const lrc = &lc->rc;
oxcf->layer_target_bitrate[layer] =
1000 * rc_cfg.layer_target_bitrate[layer];
lrc->worst_quality =
vp9_quantizer_to_qindex(rc_cfg.max_quantizers[layer]);
lrc->best_quality = vp9_quantizer_to_qindex(rc_cfg.min_quantizers[layer]);
lc->scaling_factor_num = rc_cfg.scaling_factor_num[sl];
lc->scaling_factor_den = rc_cfg.scaling_factor_den[sl];
oxcf->ts_rate_decimator[tl] = rc_cfg.ts_rate_decimator[tl];
}
}
vp9_set_rc_buffer_sizes(cpi_);
vp9_new_framerate(cpi_, cpi_->framerate);
if (cpi_->svc.number_temporal_layers > 1) {
if (cm->current_video_frame == 0) vp9_init_layer_context(cpi_);
vp9_update_layer_context_change_config(cpi_,
(int)cpi_->oxcf.target_bandwidth);
}
vp9_check_reset_rc_flag(cpi_);
}
void VP9RateControlRTC::ComputeQP(const VP9FrameParamsQpRTC &frame_params) {
VP9_COMMON *const cm = &cpi_->common;
int width, height;
cpi_->svc.spatial_layer_id = frame_params.spatial_layer_id;
cpi_->svc.temporal_layer_id = frame_params.temporal_layer_id;
if (cpi_->svc.number_spatial_layers > 1) {
const int layer = LAYER_IDS_TO_IDX(cpi_->svc.spatial_layer_id,
cpi_->svc.temporal_layer_id,
cpi_->svc.number_temporal_layers);
LAYER_CONTEXT *lc = &cpi_->svc.layer_context[layer];
get_layer_resolution(cpi_->oxcf.width, cpi_->oxcf.height,
lc->scaling_factor_num, lc->scaling_factor_den, &width,
&height);
cm->width = width;
cm->height = height;
}
vp9_set_mb_mi(cm, cm->width, cm->height);
cm->frame_type = frame_params.frame_type;
cpi_->refresh_golden_frame = (cm->frame_type == KEY_FRAME) ? 1 : 0;
cpi_->sf.use_nonrd_pick_mode = 1;
if (cpi_->svc.number_spatial_layers == 1 &&
cpi_->svc.number_temporal_layers == 1) {
int target;
if (frame_is_intra_only(cm))
target = vp9_calc_iframe_target_size_one_pass_cbr(cpi_);
else
target = vp9_calc_pframe_target_size_one_pass_cbr(cpi_);
vp9_rc_set_frame_target(cpi_, target);
vp9_update_buffer_level_preencode(cpi_);
} else {
vp9_update_temporal_layer_framerate(cpi_);
vp9_restore_layer_context(cpi_);
vp9_rc_get_svc_params(cpi_);
}
int bottom_index, top_index;
cpi_->common.base_qindex =
vp9_rc_pick_q_and_bounds(cpi_, &bottom_index, &top_index);
}
int VP9RateControlRTC::GetQP() const { return cpi_->common.base_qindex; }
int VP9RateControlRTC::GetLoopfilterLevel() const {
struct loopfilter *const lf = &cpi_->common.lf;
vp9_pick_filter_level(NULL, cpi_, LPF_PICK_FROM_Q);
return lf->filter_level;
}
void VP9RateControlRTC::PostEncodeUpdate(uint64_t encoded_frame_size) {
vp9_rc_postencode_update(cpi_, encoded_frame_size);
if (cpi_->svc.number_spatial_layers > 1 ||
cpi_->svc.number_temporal_layers > 1)
vp9_save_layer_context(cpi_);
cpi_->common.current_video_frame++;
}
} // namespace libvpx