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aa40b89006
Bug: webrtc:10342 Change-Id: Ia768f6b37a4e9b0ce66139e799833746054e3a4e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/176443 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31438}
122 lines
4 KiB
C++
122 lines
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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using Builder = GenericFrameInfo::Builder;
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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 = {
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Builder().S(0).Dtis("SR").Fdiffs({2}).ChainDiffs({2, 1}).Build(),
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Builder().S(0).Dtis("SS").ChainDiffs({0, 0}).Build(),
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Builder().S(1).Dtis("-R").Fdiffs({2, 1}).ChainDiffs({1, 1}).Build(),
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Builder().S(1).Dtis("-S").Fdiffs({1}).ChainDiffs({1, 1}).Build(),
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};
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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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LayerFrameConfig result;
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result.id = 0;
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result.spatial_id = 0;
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result.is_keyframe = true;
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result.buffers = {{/*id=*/0, /*references=*/false, /*updates=*/true}};
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return result;
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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;
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result[1].spatial_id = 1;
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result[1].is_keyframe = false;
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result[1].buffers = {{/*id=*/0, /*references=*/true, /*updates=*/false},
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{/*id=*/1, /*references=*/false, /*updates=*/true}};
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keyframe_ = false;
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} else {
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result[0].id = 2;
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result[0].spatial_id = 0;
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result[0].is_keyframe = false;
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result[0].buffers = {{/*id=*/0, /*references=*/true, /*updates=*/true}};
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result[1].id = 3;
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result[1].spatial_id = 1;
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result[1].is_keyframe = false;
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result[1].buffers = {{/*id=*/0, /*references=*/true, /*updates=*/false},
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{/*id=*/1, /*references=*/true, /*updates=*/true}};
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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.is_keyframe) {
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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.spatial_id;
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frame_info->temporal_id = config.temporal_id;
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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.spatial_id == 0, true};
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return frame_info;
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}
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} // namespace webrtc
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