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// 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_
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