mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-13 05:40:42 +01:00
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++
/*
|
|
* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
#include "modules/video_coding/svc/create_scalability_structure.h"
|
|
|
|
#include <memory>
|
|
|
|
#include "absl/strings/string_view.h"
|
|
#include "modules/video_coding/svc/scalability_structure_full_svc.h"
|
|
#include "modules/video_coding/svc/scalability_structure_key_svc.h"
|
|
#include "modules/video_coding/svc/scalability_structure_l2t2_key_shift.h"
|
|
#include "modules/video_coding/svc/scalability_structure_simulcast.h"
|
|
#include "modules/video_coding/svc/scalable_video_controller.h"
|
|
#include "modules/video_coding/svc/scalable_video_controller_no_layering.h"
|
|
#include "rtc_base/checks.h"
|
|
|
|
namespace webrtc {
|
|
namespace {
|
|
|
|
struct NamedStructureFactory {
|
|
absl::string_view name;
|
|
// Use function pointer to make NamedStructureFactory trivally destructable.
|
|
std::unique_ptr<ScalableVideoController> (*factory)();
|
|
};
|
|
|
|
// Wrap std::make_unique function to have correct return type.
|
|
template <typename T>
|
|
std::unique_ptr<ScalableVideoController> Create() {
|
|
return std::make_unique<T>();
|
|
}
|
|
|
|
template <typename T>
|
|
std::unique_ptr<ScalableVideoController> CreateH() {
|
|
// 1.5:1 scaling, see https://w3c.github.io/webrtc-svc/#scalabilitymodes*
|
|
typename T::ScalingFactor factor;
|
|
factor.num = 2;
|
|
factor.den = 3;
|
|
return std::make_unique<T>(factor);
|
|
}
|
|
|
|
constexpr NamedStructureFactory kFactories[] = {
|
|
{"NONE", Create<ScalableVideoControllerNoLayering>},
|
|
{"L1T2", Create<ScalabilityStructureL1T2>},
|
|
{"L1T3", Create<ScalabilityStructureL1T3>},
|
|
{"L2T1", Create<ScalabilityStructureL2T1>},
|
|
{"L2T1h", CreateH<ScalabilityStructureL2T1>},
|
|
{"L2T1_KEY", Create<ScalabilityStructureL2T1Key>},
|
|
{"L2T2", Create<ScalabilityStructureL2T2>},
|
|
{"L2T2_KEY", Create<ScalabilityStructureL2T2Key>},
|
|
{"L2T2_KEY_SHIFT", Create<ScalabilityStructureL2T2KeyShift>},
|
|
{"L2T3_KEY", Create<ScalabilityStructureL2T3Key>},
|
|
{"L3T1", Create<ScalabilityStructureL3T1>},
|
|
{"L3T3", Create<ScalabilityStructureL3T3>},
|
|
{"L3T3_KEY", Create<ScalabilityStructureL3T3Key>},
|
|
{"S2T1", Create<ScalabilityStructureS2T1>},
|
|
{"S3T3", Create<ScalabilityStructureS3T3>},
|
|
};
|
|
|
|
} // namespace
|
|
|
|
std::unique_ptr<ScalableVideoController> CreateScalabilityStructure(
|
|
absl::string_view name) {
|
|
RTC_DCHECK(!name.empty());
|
|
for (const auto& entry : kFactories) {
|
|
if (entry.name == name) {
|
|
return entry.factory();
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
} // namespace webrtc
|