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c9b9930c97
Bug: webrtc:11999 Change-Id: I1bfb8674b95be8155035117c771b5e4c4bfc29c5 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/208260 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Commit-Queue: Emil Lundmark <lndmrk@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33299}
78 lines
2.7 KiB
C++
78 lines
2.7 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/create_scalability_structure.h"
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#include <memory>
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#include "absl/strings/string_view.h"
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#include "modules/video_coding/svc/scalability_structure_full_svc.h"
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#include "modules/video_coding/svc/scalability_structure_key_svc.h"
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#include "modules/video_coding/svc/scalability_structure_l2t2_key_shift.h"
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#include "modules/video_coding/svc/scalability_structure_simulcast.h"
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#include "modules/video_coding/svc/scalable_video_controller.h"
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#include "modules/video_coding/svc/scalable_video_controller_no_layering.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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namespace {
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struct NamedStructureFactory {
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absl::string_view name;
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// Use function pointer to make NamedStructureFactory trivally destructable.
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std::unique_ptr<ScalableVideoController> (*factory)();
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};
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// Wrap std::make_unique function to have correct return type.
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template <typename T>
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std::unique_ptr<ScalableVideoController> Create() {
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return std::make_unique<T>();
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}
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template <typename T>
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std::unique_ptr<ScalableVideoController> CreateH() {
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// 1.5:1 scaling, see https://w3c.github.io/webrtc-svc/#scalabilitymodes*
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typename T::ScalingFactor factor;
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factor.num = 2;
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factor.den = 3;
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return std::make_unique<T>(factor);
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}
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constexpr NamedStructureFactory kFactories[] = {
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{"NONE", Create<ScalableVideoControllerNoLayering>},
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{"L1T2", Create<ScalabilityStructureL1T2>},
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{"L1T3", Create<ScalabilityStructureL1T3>},
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{"L2T1", Create<ScalabilityStructureL2T1>},
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{"L2T1h", CreateH<ScalabilityStructureL2T1>},
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{"L2T1_KEY", Create<ScalabilityStructureL2T1Key>},
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{"L2T2", Create<ScalabilityStructureL2T2>},
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{"L2T2_KEY", Create<ScalabilityStructureL2T2Key>},
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{"L2T2_KEY_SHIFT", Create<ScalabilityStructureL2T2KeyShift>},
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{"L2T3_KEY", Create<ScalabilityStructureL2T3Key>},
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{"L3T1", Create<ScalabilityStructureL3T1>},
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{"L3T3", Create<ScalabilityStructureL3T3>},
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{"L3T3_KEY", Create<ScalabilityStructureL3T3Key>},
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{"S2T1", Create<ScalabilityStructureS2T1>},
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{"S3T3", Create<ScalabilityStructureS3T3>},
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};
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} // namespace
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std::unique_ptr<ScalableVideoController> CreateScalabilityStructure(
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absl::string_view name) {
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RTC_DCHECK(!name.empty());
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for (const auto& entry : kFactories) {
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if (entry.name == name) {
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return entry.factory();
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}
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}
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return nullptr;
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}
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} // namespace webrtc
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