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/*
* 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/common/vp9_common.h"
#include "vp9/encoder/vp9_aq_cyclicrefresh.h"
#include "vp9/encoder/vp9_encoder.h"
#include "vp9/encoder/vp9_picklpf.h"
#include "vpx/vp8cx.h"
#include "vpx/vpx_codec.h"
#include "vpx_mem/vpx_mem.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_) return nullptr;
vp9_zero(*rc_api->cpi_);
if (!rc_api->InitRateControl(cfg)) return nullptr;
if (cfg.aq_mode) {
VP9_COMP *const cpi = rc_api->cpi_;
cpi->segmentation_map = static_cast<uint8_t *>(
vpx_calloc(cpi->common.mi_rows * cpi->common.mi_cols,
sizeof(*cpi->segmentation_map)));
if (!cpi->segmentation_map) return nullptr;
cpi->cyclic_refresh =
vp9_cyclic_refresh_alloc(cpi->common.mi_rows, cpi->common.mi_cols);
cpi->cyclic_refresh->content_mode = 0;
}
return rc_api;
}
VP9RateControlRTC::~VP9RateControlRTC() {
if (cpi_) {
if (cpi_->svc.number_spatial_layers > 1 ||
cpi_->svc.number_temporal_layers > 1) {
for (int sl = 0; sl < cpi_->svc.number_spatial_layers; sl++) {
for (int tl = 0; tl < cpi_->svc.number_temporal_layers; tl++) {
int layer = LAYER_IDS_TO_IDX(sl, tl, cpi_->oxcf.ts_number_layers);
LAYER_CONTEXT *const lc = &cpi_->svc.layer_context[layer];
vpx_free(lc->map);
vpx_free(lc->last_coded_q_map);
vpx_free(lc->consec_zero_mv);
}
}
}
if (cpi_->oxcf.aq_mode == CYCLIC_REFRESH_AQ) {
vpx_free(cpi_->segmentation_map);
cpi_->segmentation_map = NULL;
vp9_cyclic_refresh_free(cpi_->cyclic_refresh);
}
vpx_free(cpi_);
}
}
bool 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->profile = cm->profile;
oxcf->bit_depth = cm->bit_depth;
oxcf->rc_mode = rc_cfg.rc_mode;
oxcf->pass = 0;
oxcf->aq_mode = rc_cfg.aq_mode ? CYCLIC_REFRESH_AQ : NO_AQ;
oxcf->content = VP9E_CONTENT_DEFAULT;
oxcf->drop_frames_water_mark = 0;
cm->current_video_frame = 0;
rc->kf_boost = DEFAULT_KF_BOOST;
if (!UpdateRateControl(rc_cfg)) return false;
vp9_set_mb_mi(cm, cm->width, cm->height);
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);
rc->constrain_gf_key_freq_onepass_vbr = 0;
cpi_->sf.use_nonrd_pick_mode = 1;
return true;
}
bool VP9RateControlRTC::UpdateRateControl(
const VP9RateControlRtcConfig &rc_cfg) {
// Since VPX_MAX_LAYERS (12) is less than the product of VPX_SS_MAX_LAYERS (5)
// and VPX_TS_MAX_LAYERS (5), check all three.
if (rc_cfg.ss_number_layers < 1 ||
rc_cfg.ss_number_layers > VPX_SS_MAX_LAYERS ||
rc_cfg.ts_number_layers < 1 ||
rc_cfg.ts_number_layers > VPX_TS_MAX_LAYERS ||
rc_cfg.ss_number_layers * rc_cfg.ts_number_layers > VPX_MAX_LAYERS) {
return false;
}
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->init_framerate = rc_cfg.framerate;
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->drop_frames_water_mark = rc_cfg.frame_drop_thresh;
oxcf->content = rc_cfg.is_screen ? VP9E_CONTENT_SCREEN : VP9E_CONTENT_DEFAULT;
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_->oxcf.rc_max_inter_bitrate_pct = rc_cfg.max_inter_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;
vp9_set_mb_mi(cm, cm->width, cm->height);
if (setjmp(cpi_->common.error.jmp)) {
cpi_->common.error.setjmp = 0;
vpx_clear_system_state();
return false;
}
cpi_->common.error.setjmp = 1;
for (int tl = 0; tl < cpi_->svc.number_temporal_layers; ++tl) {
oxcf->ts_rate_decimator[tl] = rc_cfg.ts_rate_decimator[tl];
}
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];
}
}
vp9_set_rc_buffer_sizes(cpi_);
vp9_new_framerate(cpi_, cpi_->framerate);
if (cpi_->svc.number_temporal_layers > 1 ||
cpi_->svc.number_spatial_layers > 1) {
if (cm->current_video_frame == 0) {
vp9_init_layer_context(cpi_);
// svc->framedrop_mode is not currently exposed, so only allow for
// full superframe drop for now.
cpi_->svc.framedrop_mode = FULL_SUPERFRAME_DROP;
}
vp9_update_layer_context_change_config(cpi_,
(int)cpi_->oxcf.target_bandwidth);
cpi_->svc.max_consec_drop = rc_cfg.max_consec_drop;
}
vp9_check_reset_rc_flag(cpi_);
cpi_->common.error.setjmp = 0;
return true;
}
// Compute the QP for the frame. If the frame is dropped this function
// returns kDrop, and no QP is computed. If the frame is encoded (not dropped)
// the QP is computed and kOk is returned.
FrameDropDecision 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 = static_cast<FRAME_TYPE>(frame_params.frame_type);
// This is needed to ensure key frame does not get unset in rc_get_svc_params.
cpi_->frame_flags = (cm->frame_type == KEY_FRAME) ? FRAMEFLAGS_KEY : 0;
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 = 0;
if (cpi_->oxcf.rc_mode == VPX_CBR) {
if (cpi_->oxcf.aq_mode == CYCLIC_REFRESH_AQ)
vp9_cyclic_refresh_update_parameters(cpi_);
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_);
} else if (cpi_->oxcf.rc_mode == VPX_VBR) {
if (cm->frame_type == KEY_FRAME) {
cpi_->rc.this_key_frame_forced = cm->current_video_frame != 0;
cpi_->rc.frames_to_key = cpi_->oxcf.key_freq;
}
vp9_set_gf_update_one_pass_vbr(cpi_);
if (cpi_->oxcf.aq_mode == CYCLIC_REFRESH_AQ)
vp9_cyclic_refresh_update_parameters(cpi_);
if (frame_is_intra_only(cm))
target = vp9_calc_iframe_target_size_one_pass_vbr(cpi_);
else
target = vp9_calc_pframe_target_size_one_pass_vbr(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_);
}
if (cpi_->svc.spatial_layer_id == 0) vp9_zero(cpi_->svc.drop_spatial_layer);
// SVC: check for skip encoding of enhancement layer if the
// layer target bandwidth = 0.
if (vp9_svc_check_skip_enhancement_layer(cpi_))
return FrameDropDecision::kDrop;
// Check for dropping this frame based on buffer level.
// Never drop on key frame, or if base layer is key for svc,
if (!frame_is_intra_only(cm) &&
(!cpi_->use_svc ||
!cpi_->svc.layer_context[cpi_->svc.temporal_layer_id].is_key_frame)) {
if (vp9_rc_drop_frame(cpi_)) {
// For FULL_SUPERFRAME_DROP mode (the only mode considered here):
// if the superframe drop is decided we need to save the layer context for
// all spatial layers, and call update_buffer_level and postencode_drop
// for all spatial layers.
if (cpi_->svc.number_spatial_layers > 1 ||
cpi_->svc.number_temporal_layers > 1) {
vp9_save_layer_context(cpi_);
for (int sl = 1; sl < cpi_->svc.number_spatial_layers; sl++) {
cpi_->svc.spatial_layer_id = sl;
vp9_restore_layer_context(cpi_);
vp9_update_buffer_level_svc_preencode(cpi_);
vp9_rc_postencode_update_drop_frame(cpi_);
vp9_save_layer_context(cpi_);
}
}
return FrameDropDecision::kDrop;
}
}
// Compute the QP for the frame.
int bottom_index, top_index;
cpi_->common.base_qindex =
vp9_rc_pick_q_and_bounds(cpi_, &bottom_index, &top_index);
if (cpi_->oxcf.aq_mode == CYCLIC_REFRESH_AQ) vp9_cyclic_refresh_setup(cpi_);
if (cpi_->svc.number_spatial_layers > 1 ||
cpi_->svc.number_temporal_layers > 1)
vp9_save_layer_context(cpi_);
cpi_->last_frame_dropped = 0;
cpi_->svc.last_layer_dropped[cpi_->svc.spatial_layer_id] = 0;
if (cpi_->svc.spatial_layer_id == cpi_->svc.number_spatial_layers - 1)
cpi_->svc.num_encoded_top_layer++;
return FrameDropDecision::kOk;
}
int VP9RateControlRTC::GetQP() const { return cpi_->common.base_qindex; }
int VP9RateControlRTC::GetLoopfilterLevel() const {
struct loopfilter *const lf = &cpi_->common.lf;
vp9_pick_filter_level(nullptr, cpi_, LPF_PICK_FROM_Q);
return lf->filter_level;
}
bool VP9RateControlRTC::GetSegmentationData(
VP9SegmentationData *segmentation_data) const {
if (!cpi_->cyclic_refresh || !cpi_->cyclic_refresh->apply_cyclic_refresh) {
return false;
}
segmentation_data->segmentation_map = cpi_->segmentation_map;
segmentation_data->segmentation_map_size =
cpi_->common.mi_cols * cpi_->common.mi_rows;
segmentation_data->delta_q = cpi_->cyclic_refresh->qindex_delta;
segmentation_data->delta_q_size = 3u;
return true;
}
void VP9RateControlRTC::PostEncodeUpdate(
uint64_t encoded_frame_size, const VP9FrameParamsQpRTC &frame_params) {
cpi_->common.frame_type = static_cast<FRAME_TYPE>(frame_params.frame_type);
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 ||
cpi_->svc.number_temporal_layers > 1) {
vp9_restore_layer_context(cpi_);
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];
cpi_->common.base_qindex = lc->frame_qp;
cpi_->common.MBs = lc->MBs;
// For spatial-svc, allow cyclic-refresh to be applied on the spatial
// layers, for the base temporal layer.
if (cpi_->oxcf.aq_mode == CYCLIC_REFRESH_AQ &&
cpi_->svc.number_spatial_layers > 1 &&
cpi_->svc.temporal_layer_id == 0) {
CYCLIC_REFRESH *const cr = cpi_->cyclic_refresh;
cr->qindex_delta[0] = lc->qindex_delta[0];
cr->qindex_delta[1] = lc->qindex_delta[1];
cr->qindex_delta[2] = lc->qindex_delta[2];
}
}
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