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/*
* Copyright 2021 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 COMMON_VIDEO_FRAMERATE_CONTROLLER_H_
#define COMMON_VIDEO_FRAMERATE_CONTROLLER_H_
#include <stdint.h>
#include "absl/types/optional.h"
namespace webrtc {
// Determines which frames that should be dropped based on input framerate and
// requested framerate.
class FramerateController {
public:
FramerateController();
explicit FramerateController(double max_framerate);
~FramerateController();
// Sets max framerate (default is maxdouble).
void SetMaxFramerate(double max_framerate);
double GetMaxFramerate() const;
// Returns true if the frame should be dropped, false otherwise.
bool ShouldDropFrame(int64_t in_timestamp_ns);
void Reset();
void KeepFrame(int64_t in_timestamp_ns);
private:
double max_framerate_;
absl::optional<int64_t> next_frame_timestamp_ns_;
};
} // namespace webrtc
#endif // COMMON_VIDEO_FRAMERATE_CONTROLLER_H_