blob: f608590583bdb811f846a43ca9e3588745392488 [file] [log] [blame]
/*
* Copyright (c) 2018 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 MODULES_CONGESTION_CONTROLLER_CONGESTION_WINDOW_PUSHBACK_CONTROLLER_H_
#define MODULES_CONGESTION_CONTROLLER_CONGESTION_WINDOW_PUSHBACK_CONTROLLER_H_
#include "api/transport/network_types.h"
#include "common_types.h" // NOLINT(build/include)
#include "rtc_base/criticalsection.h"
#include "rtc_base/format_macros.h"
namespace webrtc {
// This class enables pushback from congestion window directly to video encoder.
// When the congestion window is filling up, the video encoder target bitrate
// will be reduced accordingly to accommodate the network changes. To avoid
// pausing video too frequently, a minimum encoder target bitrate threshold is
// used to prevent video pause due to a full congestion window.
class CongestionWindowPushbackController {
public:
CongestionWindowPushbackController();
void UpdateOutstandingData(size_t outstanding_bytes);
void UpdateMaxOutstandingData(size_t max_outstanding_bytes);
uint32_t UpdateTargetBitrate(uint32_t bitrate_bps);
void SetDataWindow(DataSize data_window);
private:
absl::optional<DataSize> current_data_window_;
size_t outstanding_bytes_ = 0;
uint32_t min_pushback_target_bitrate_bps_;
double encoding_rate_ratio_ = 1.0;
};
} // namespace webrtc
#endif // MODULES_CONGESTION_CONTROLLER_CONGESTION_WINDOW_PUSHBACK_CONTROLLER_H_