| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MEDIA_BASE_VIDEO_BITRATE_ALLOCATION_H_ |
| #define MEDIA_BASE_VIDEO_BITRATE_ALLOCATION_H_ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "base/macros.h" |
| #include "media/base/media_export.h" |
| |
| namespace media { |
| |
| // Class that describes how video bitrate, in bps, is allocated across temporal |
| // and spatial layers. Note that bitrates are NOT cumulative. Depending on if |
| // layers are dependent or not, it is up to the user to aggregate. |
| class MEDIA_EXPORT VideoBitrateAllocation { |
| public: |
| static constexpr size_t kMaxSpatialLayers = 5; |
| static constexpr size_t kMaxTemporalLayers = 4; |
| |
| VideoBitrateAllocation(); |
| ~VideoBitrateAllocation() = default; |
| |
| // Returns if this bitrate can't be set (sum exceeds int max value). |
| bool SetBitrate(size_t spatial_index, size_t temporal_index, int bitrate_bps); |
| |
| // Returns the bitrate for specified spatial/temporal index, or 0 if not set. |
| int GetBitrateBps(size_t spatial_index, size_t temporal_index) const; |
| |
| // Sum of all bitrates. |
| int32_t GetSumBps() const; |
| |
| bool operator==(const VideoBitrateAllocation& other) const; |
| inline bool operator!=(const VideoBitrateAllocation& other) const { |
| return !(*this == other); |
| } |
| |
| private: |
| int sum_; // Cached sum of all elements of |bitrates_|, for performance. |
| int bitrates_[kMaxSpatialLayers][kMaxTemporalLayers]; |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_BASE_VIDEO_BITRATE_ALLOCATION_H_ |