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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}
103 lines
3.4 KiB
C++
103 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_l1t2.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 kDiscardable = DecodeTargetIndication::kDiscardable;
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constexpr auto kSwitch = DecodeTargetIndication::kSwitch;
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constexpr DecodeTargetIndication kDtis[3][2] = {
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{kSwitch, kSwitch}, // KeyFrame
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{kNotPresent, kDiscardable}, // DeltaFrame T1
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{kSwitch, kSwitch}, // DeltaFrame T0
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};
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} // namespace
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ScalabilityStructureL1T2::~ScalabilityStructureL1T2() = default;
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ScalableVideoController::StreamLayersConfig
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ScalabilityStructureL1T2::StreamConfig() const {
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StreamLayersConfig result;
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result.num_spatial_layers = 1;
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result.num_temporal_layers = 2;
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return result;
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}
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FrameDependencyStructure ScalabilityStructureL1T2::DependencyStructure() const {
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FrameDependencyStructure structure;
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structure.num_decode_targets = 2;
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structure.num_chains = 1;
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structure.decode_target_protected_by_chain = {0, 0};
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structure.templates.resize(3);
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structure.templates[0].T(0).Dtis("SS").ChainDiffs({0});
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structure.templates[1].T(0).Dtis("SS").ChainDiffs({2}).FrameDiffs({2});
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structure.templates[2].T(1).Dtis("-D").ChainDiffs({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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ScalabilityStructureL1T2::NextFrameConfig(bool restart) {
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if (restart) {
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next_pattern_ = kKeyFrame;
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}
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std::vector<LayerFrameConfig> result(1);
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switch (next_pattern_) {
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case kKeyFrame:
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result[0].Id(0).T(0).Keyframe().Update(0);
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next_pattern_ = kDeltaFrameT1;
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break;
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case kDeltaFrameT1:
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result[0].Id(1).T(1).Reference(0);
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next_pattern_ = kDeltaFrameT0;
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break;
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case kDeltaFrameT0:
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result[0].Id(2).T(0).ReferenceAndUpdate(0);
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next_pattern_ = kDeltaFrameT1;
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break;
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}
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return result;
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}
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absl::optional<GenericFrameInfo> ScalabilityStructureL1T2::OnEncodeDone(
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LayerFrameConfig config) {
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// Encoder may have generated a keyframe even when not asked for it. Treat
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// such frame same as requested keyframe, in particular restart the sequence.
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if (config.IsKeyframe()) {
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config = NextFrameConfig(/*restart=*/true).front();
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}
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absl::optional<GenericFrameInfo> frame_info;
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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->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.TemporalId() == 0};
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return frame_info;
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}
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} // namespace webrtc
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