1 /*
2  *  Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 #ifndef MODULES_VIDEO_CODING_CODECS_AV1_SCALABILITY_STRUCTURE_L3T1_H_
11 #define MODULES_VIDEO_CODING_CODECS_AV1_SCALABILITY_STRUCTURE_L3T1_H_
12 
13 #include <vector>
14 
15 #include "absl/types/optional.h"
16 #include "api/transport/rtp/dependency_descriptor.h"
17 #include "common_video/generic_frame_descriptor/generic_frame_info.h"
18 #include "modules/video_coding/codecs/av1/scalable_video_controller.h"
19 
20 namespace webrtc {
21 
22 // S2     0-0-0-
23 //        | | |
24 // S1     0-0-0-...
25 //        | | |
26 // S0     0-0-0-
27 // Time-> 0 1 2
28 class ScalabilityStructureL3T1 : public ScalableVideoController {
29  public:
30   ~ScalabilityStructureL3T1() override;
31 
32   StreamLayersConfig StreamConfig() const override;
33   FrameDependencyStructure DependencyStructure() const override;
34 
35   std::vector<LayerFrameConfig> NextFrameConfig(bool restart) override;
36   absl::optional<GenericFrameInfo> OnEncodeDone(
37       LayerFrameConfig config) override;
38 
39  private:
40   bool keyframe_ = true;
41 };
42 
43 }  // namespace webrtc
44 
45 #endif  // MODULES_VIDEO_CODING_CODECS_AV1_SCALABILITY_STRUCTURE_L3T1_H_
46