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24263f4ffb
Bug: None Change-Id: I4c13bdabd08dd6a6011cb534c765c1dd09f218d1 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/176843 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Björn Terelius <terelius@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31500}
100 lines
3.4 KiB
C++
100 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/codecs/av1/scalability_structure_l2t1.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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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[4][2] = {
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{kSwitch, kSwitch}, // Key, S0
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{kNotPresent, kSwitch}, // Key, S1
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{kSwitch, kRequired}, // Delta, S0
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{kNotPresent, kRequired}, // Delta, S1
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};
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} // namespace
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ScalabilityStructureL2T1::~ScalabilityStructureL2T1() = default;
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ScalableVideoController::StreamLayersConfig
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ScalabilityStructureL2T1::StreamConfig() const {
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StreamLayersConfig result;
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result.num_spatial_layers = 2;
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result.num_temporal_layers = 1;
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return result;
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}
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FrameDependencyStructure ScalabilityStructureL2T1::DependencyStructure() const {
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FrameDependencyStructure structure;
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structure.num_decode_targets = 2;
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structure.num_chains = 2;
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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("SR").ChainDiffs({2, 1}).FrameDiffs({2});
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structure.templates[1].S(0).Dtis("SS").ChainDiffs({0, 0});
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structure.templates[2].S(1).Dtis("-R").ChainDiffs({1, 1}).FrameDiffs({2, 1});
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structure.templates[3].S(1).Dtis("-S").ChainDiffs({1, 1}).FrameDiffs({1});
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return structure;
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}
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ScalableVideoController::LayerFrameConfig
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ScalabilityStructureL2T1::KeyFrameConfig() const {
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return LayerFrameConfig().Id(0).S(0).Keyframe().Update(0);
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}
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std::vector<ScalableVideoController::LayerFrameConfig>
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ScalabilityStructureL2T1::NextFrameConfig(bool restart) {
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std::vector<LayerFrameConfig> result(2);
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// Buffer0 keeps latest S0 frame, Buffer1 keeps latest S1 frame.
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if (restart || keyframe_) {
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result[0] = KeyFrameConfig();
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result[1].Id(1).S(1).Reference(0).Update(1);
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keyframe_ = false;
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} else {
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result[0].Id(2).S(0).ReferenceAndUpdate(0);
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result[1].Id(3).S(1).Reference(0).ReferenceAndUpdate(1);
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}
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return result;
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}
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absl::optional<GenericFrameInfo> ScalabilityStructureL2T1::OnEncodeDone(
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LayerFrameConfig config) {
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absl::optional<GenericFrameInfo> frame_info;
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if (config.IsKeyframe()) {
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config = KeyFrameConfig();
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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 = std::move(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, true};
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return frame_info;
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}
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} // namespace webrtc
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