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Diffstat (limited to 'third_party/libwebrtc/modules/congestion_controller/goog_cc/congestion_window_pushback_controller.h')
-rw-r--r-- | third_party/libwebrtc/modules/congestion_controller/goog_cc/congestion_window_pushback_controller.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/congestion_window_pushback_controller.h b/third_party/libwebrtc/modules/congestion_controller/goog_cc/congestion_window_pushback_controller.h new file mode 100644 index 0000000000..ea9ed97c3d --- /dev/null +++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/congestion_window_pushback_controller.h @@ -0,0 +1,48 @@ +/* + * 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_GOOG_CC_CONGESTION_WINDOW_PUSHBACK_CONTROLLER_H_ +#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_CONGESTION_WINDOW_PUSHBACK_CONTROLLER_H_ + +#include <stddef.h> +#include <stdint.h> + +#include "absl/types/optional.h" +#include "api/field_trials_view.h" +#include "api/units/data_size.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: + explicit CongestionWindowPushbackController( + const FieldTrialsView* key_value_config); + void UpdateOutstandingData(int64_t outstanding_bytes); + void UpdatePacingQueue(int64_t pacing_bytes); + uint32_t UpdateTargetBitrate(uint32_t bitrate_bps); + void SetDataWindow(DataSize data_window); + + private: + const bool add_pacing_; + const uint32_t min_pushback_target_bitrate_bps_; + absl::optional<DataSize> current_data_window_; + int64_t outstanding_bytes_ = 0; + int64_t pacing_bytes_ = 0; + double encoding_rate_ratio_ = 1.0; +}; + +} // namespace webrtc + +#endif // MODULES_CONGESTION_CONTROLLER_GOOG_CC_CONGESTION_WINDOW_PUSHBACK_CONTROLLER_H_ |