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82031310f5
Bug: webrtc:11999 Change-Id: I22bcf357d29dfdf93239b1b71732a647d9b0557a Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/189548 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32442}
97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
/*
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* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/video_coding/svc/scalability_structure_s2t1.h"
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#include <utility>
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#include <vector>
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#include "absl/base/macros.h"
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#include "api/transport/rtp/dependency_descriptor.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/logging.h"
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namespace webrtc {
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constexpr int ScalabilityStructureS2T1::kNumSpatialLayers;
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ScalabilityStructureS2T1::~ScalabilityStructureS2T1() = default;
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ScalableVideoController::StreamLayersConfig
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ScalabilityStructureS2T1::StreamConfig() const {
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StreamLayersConfig result;
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result.num_spatial_layers = kNumSpatialLayers;
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result.num_temporal_layers = 1;
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result.scaling_factor_num[0] = 1;
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result.scaling_factor_den[0] = 2;
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return result;
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}
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FrameDependencyStructure ScalabilityStructureS2T1::DependencyStructure() const {
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FrameDependencyStructure structure;
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structure.num_decode_targets = kNumSpatialLayers;
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structure.num_chains = kNumSpatialLayers;
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structure.decode_target_protected_by_chain = {0, 1};
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structure.templates.resize(4);
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structure.templates[0].S(0).Dtis("S-").ChainDiffs({2, 1}).FrameDiffs({2});
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structure.templates[1].S(0).Dtis("S-").ChainDiffs({0, 0});
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structure.templates[2].S(1).Dtis("-S").ChainDiffs({1, 2}).FrameDiffs({2});
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structure.templates[3].S(1).Dtis("-S").ChainDiffs({1, 0});
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return structure;
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}
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std::vector<ScalableVideoController::LayerFrameConfig>
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ScalabilityStructureS2T1::NextFrameConfig(bool restart) {
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if (restart) {
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can_reference_frame_for_spatial_id_.reset();
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}
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std::vector<LayerFrameConfig> configs;
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configs.reserve(kNumSpatialLayers);
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for (int sid = 0; sid < kNumSpatialLayers; ++sid) {
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if (!active_decode_targets_[sid]) {
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can_reference_frame_for_spatial_id_.reset(sid);
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continue;
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}
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configs.emplace_back();
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LayerFrameConfig& config = configs.back().S(sid);
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if (can_reference_frame_for_spatial_id_[sid]) {
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config.ReferenceAndUpdate(sid);
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} else {
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config.Keyframe().Update(sid);
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can_reference_frame_for_spatial_id_.set(sid);
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}
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}
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return configs;
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}
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GenericFrameInfo ScalabilityStructureS2T1::OnEncodeDone(
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const LayerFrameConfig& config) {
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GenericFrameInfo frame_info;
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frame_info.spatial_id = config.SpatialId();
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frame_info.temporal_id = config.TemporalId();
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frame_info.encoder_buffers = config.Buffers();
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frame_info.decode_target_indications = {
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config.SpatialId() == 0 ? DecodeTargetIndication::kSwitch
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: DecodeTargetIndication::kNotPresent,
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config.SpatialId() == 1 ? DecodeTargetIndication::kSwitch
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: DecodeTargetIndication::kNotPresent,
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};
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frame_info.part_of_chain = {config.SpatialId() == 0, config.SpatialId() == 1};
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frame_info.active_decode_targets = active_decode_targets_;
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return frame_info;
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}
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void ScalabilityStructureS2T1::OnRatesUpdated(
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const VideoBitrateAllocation& bitrates) {
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active_decode_targets_.set(0, bitrates.GetBitrate(/*sid=*/0, /*tid=*/0) > 0);
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active_decode_targets_.set(1, bitrates.GetBitrate(/*sid=*/1, /*tid=*/0) > 0);
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}
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} // namespace webrtc
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