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 
11 #ifndef MODULES_VIDEO_CODING_FRAME_DEPENDENCIES_CALCULATOR_H_
12 #define MODULES_VIDEO_CODING_FRAME_DEPENDENCIES_CALCULATOR_H_
13 
14 #include <stdint.h>
15 
16 #include <vector>
17 
18 #include "absl/container/inlined_vector.h"
19 #include "absl/types/optional.h"
20 #include "api/array_view.h"
21 #include "common_video/generic_frame_descriptor/generic_frame_info.h"
22 
23 namespace webrtc {
24 
25 // This class is thread compatible.
26 class FrameDependenciesCalculator {
27  public:
28   FrameDependenciesCalculator() = default;
29   FrameDependenciesCalculator(const FrameDependenciesCalculator&) = default;
30   FrameDependenciesCalculator& operator=(const FrameDependenciesCalculator&) =
31       default;
32 
33   // Calculates frame dependencies based on previous encoder buffer usage.
34   absl::InlinedVector<int64_t, 5> FromBuffersUsage(
35       int64_t frame_id,
36       rtc::ArrayView<const CodecBufferUsage> buffers_usage);
37 
38  private:
39   struct BufferUsage {
40     absl::optional<int64_t> frame_id;
41     absl::InlinedVector<int64_t, 4> dependencies;
42   };
43 
44   absl::InlinedVector<BufferUsage, 4> buffers_;
45 };
46 
47 }  // namespace webrtc
48 
49 #endif  // MODULES_VIDEO_CODING_FRAME_DEPENDENCIES_CALCULATOR_H_
50