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1e10a61564
Bug: webrtc:11042 Change-Id: I93f125fba1fa21d060de47c96435798525f6b374 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/178566 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31617}
112 lines
4.1 KiB
C++
112 lines
4.1 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/codecs/av1/scalability_structure_l3t1.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 "absl/types/optional.h"
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#include "api/transport/rtp/dependency_descriptor.h"
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#include "rtc_base/logging.h"
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namespace webrtc {
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namespace {
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constexpr auto kNotPresent = DecodeTargetIndication::kNotPresent;
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constexpr auto kSwitch = DecodeTargetIndication::kSwitch;
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constexpr auto kRequired = DecodeTargetIndication::kRequired;
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constexpr DecodeTargetIndication kDtis[5][3] = {
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{kSwitch, kSwitch, kSwitch}, // Key, S0
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{kNotPresent, kSwitch, kSwitch}, // Key, S1
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{kNotPresent, kNotPresent, kSwitch}, // Key and Delta, S2
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{kSwitch, kRequired, kRequired}, // Delta, S0
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{kNotPresent, kSwitch, kRequired}, // Delta, S1
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};
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} // namespace
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ScalabilityStructureL3T1::~ScalabilityStructureL3T1() = default;
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ScalableVideoController::StreamLayersConfig
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ScalabilityStructureL3T1::StreamConfig() const {
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StreamLayersConfig result;
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result.num_spatial_layers = 3;
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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] = 4;
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result.scaling_factor_num[1] = 1;
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result.scaling_factor_den[1] = 2;
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return result;
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}
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FrameDependencyStructure ScalabilityStructureL3T1::DependencyStructure() const {
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FrameDependencyStructure structure;
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structure.num_decode_targets = 3;
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structure.num_chains = 3;
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structure.decode_target_protected_by_chain = {0, 1, 2};
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auto& templates = structure.templates;
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templates.resize(6);
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templates[0].S(0).Dtis("SRR").ChainDiffs({3, 2, 1}).FrameDiffs({3});
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templates[1].S(0).Dtis("SSS").ChainDiffs({0, 0, 0});
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templates[2].S(1).Dtis("-SR").ChainDiffs({1, 1, 1}).FrameDiffs({3, 1});
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templates[3].S(1).Dtis("-SS").ChainDiffs({1, 1, 1}).FrameDiffs({1});
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templates[4].S(2).Dtis("--S").ChainDiffs({2, 1, 1}).FrameDiffs({3, 1});
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templates[5].S(2).Dtis("--S").ChainDiffs({2, 1, 1}).FrameDiffs({1});
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return structure;
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}
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std::vector<ScalableVideoController::LayerFrameConfig>
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ScalabilityStructureL3T1::NextFrameConfig(bool restart) {
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std::vector<LayerFrameConfig> config(3);
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// Buffer i keeps latest frame for spatial layer i
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if (restart || keyframe_) {
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config[0].Id(0).S(0).Keyframe().Update(0);
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config[1].Id(1).S(1).Update(1).Reference(0);
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config[2].Id(2).S(2).Update(2).Reference(1);
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keyframe_ = false;
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} else {
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config[0].Id(3).S(0).ReferenceAndUpdate(0);
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config[1].Id(4).S(1).ReferenceAndUpdate(1).Reference(0);
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config[2].Id(2).S(2).ReferenceAndUpdate(2).Reference(1);
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}
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return config;
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}
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absl::optional<GenericFrameInfo> ScalabilityStructureL3T1::OnEncodeDone(
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LayerFrameConfig config) {
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absl::optional<GenericFrameInfo> frame_info;
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if (config.IsKeyframe() && config.Id() != 0) {
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// Encoder generated a key frame without asking to.
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if (config.SpatialId() > 0) {
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RTC_LOG(LS_WARNING) << "Unexpected spatial id " << config.SpatialId()
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<< " for key frame.";
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}
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config = LayerFrameConfig().Id(0).S(0).Keyframe().Update(0);
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}
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if (config.Id() < 0 || config.Id() >= int{ABSL_ARRAYSIZE(kDtis)}) {
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RTC_LOG(LS_ERROR) << "Unexpected config id " << config.Id();
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return frame_info;
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}
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frame_info.emplace();
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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.assign(std::begin(kDtis[config.Id()]),
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std::end(kDtis[config.Id()]));
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frame_info->part_of_chain = {config.SpatialId() == 0, config.SpatialId() <= 1,
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true};
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return frame_info;
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}
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} // namespace webrtc
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