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/*
* 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.
*/
#ifndef MODULES_VIDEO_CODING_CODECS_AV1_SCALABILITY_STRUCTURE_L2T2_H_
#define MODULES_VIDEO_CODING_CODECS_AV1_SCALABILITY_STRUCTURE_L2T2_H_
#include <vector>
#include "api/transport/rtp/dependency_descriptor.h"
#include "common_video/generic_frame_descriptor/generic_frame_info.h"
#include "modules/video_coding/codecs/av1/scalable_video_controller.h"
namespace webrtc {
// S1T1 0 0
// /| /| /
// S1T0 0-+-0-+-0
// | | | | | ...
// S0T1 | 0 | 0 |
// |/ |/ |/
// S0T0 0---0---0--
// Time-> 0 1 2 3 4
class ScalabilityStructureL2T2 : public ScalableVideoController {
public:
~ScalabilityStructureL2T2() override;
StreamLayersConfig StreamConfig() const override;
FrameDependencyStructure DependencyStructure() const override;
std::vector<LayerFrameConfig> NextFrameConfig(bool restart) override;
absl::optional<GenericFrameInfo> OnEncodeDone(
LayerFrameConfig config) override;
private:
enum FramePattern {
kKey,
kDeltaT1,
kDeltaT0,
};
LayerFrameConfig KeyFrameConfig() const;
FramePattern next_pattern_ = kKey;
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_CODECS_AV1_SCALABILITY_STRUCTURE_L2T2_H_