56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
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/*
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* Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VIDEO_ENCODER_OVERSHOOT_DETECTOR_H_
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#define VIDEO_ENCODER_OVERSHOOT_DETECTOR_H_
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#include <deque>
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#include "absl/types/optional.h"
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#include "api/units/data_rate.h"
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namespace webrtc {
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class EncoderOvershootDetector {
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public:
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explicit EncoderOvershootDetector(int64_t window_size_ms);
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~EncoderOvershootDetector();
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void SetTargetRate(DataRate target_bitrate,
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double target_framerate_fps,
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int64_t time_ms);
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void OnEncodedFrame(size_t bytes, int64_t time_ms);
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absl::optional<double> GetUtilizationFactor(int64_t time_ms);
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void Reset();
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private:
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int64_t IdealFrameSizeBits() const;
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void LeakBits(int64_t time_ms);
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const int64_t window_size_ms_;
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int64_t time_last_update_ms_;
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struct BitrateUpdate {
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BitrateUpdate(double utilization_factor, int64_t update_time_ms)
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: utilization_factor(utilization_factor),
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update_time_ms(update_time_ms) {}
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double utilization_factor;
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int64_t update_time_ms;
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};
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std::deque<BitrateUpdate> utilization_factors_;
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double sum_utilization_factors_;
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DataRate target_bitrate_;
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double target_framerate_fps_;
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int64_t buffer_level_bits_;
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};
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} // namespace webrtc
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#endif // VIDEO_ENCODER_OVERSHOOT_DETECTOR_H_
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