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