| /* |
| * Copyright (c) 2016 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_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_FRAME_LENGTH_CONTROLLER_H_ |
| #define MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_FRAME_LENGTH_CONTROLLER_H_ |
| |
| #include <stddef.h> |
| |
| #include <map> |
| #include <set> |
| |
| #include "absl/types/optional.h" |
| #include "modules/audio_coding/audio_network_adaptor/controller.h" |
| #include "modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor_config.h" |
| |
| namespace webrtc { |
| |
| // Determines target frame length based on the network metrics and the decision |
| // of FEC controller. |
| class FrameLengthController final : public Controller { |
| public: |
| struct Config { |
| struct FrameLengthChange { |
| FrameLengthChange(int from_frame_length_ms, int to_frame_length_ms); |
| bool operator<(const FrameLengthChange& rhs) const; |
| int from_frame_length_ms; |
| int to_frame_length_ms; |
| }; |
| Config(const std::set<int>& encoder_frame_lengths_ms, |
| int initial_frame_length_ms, |
| int min_encoder_bitrate_bps, |
| float fl_increasing_packet_loss_fraction, |
| float fl_decreasing_packet_loss_fraction, |
| int fl_increase_overhead_offset, |
| int fl_decrease_overhead_offset, |
| std::map<FrameLengthChange, int> fl_changing_bandwidths_bps); |
| Config(const Config& other); |
| ~Config(); |
| std::set<int> encoder_frame_lengths_ms; |
| int initial_frame_length_ms; |
| int min_encoder_bitrate_bps; |
| // Uplink packet loss fraction below which frame length can increase. |
| float fl_increasing_packet_loss_fraction; |
| // Uplink packet loss fraction below which frame length should decrease. |
| float fl_decreasing_packet_loss_fraction; |
| // Offset to apply to overhead calculation when increasing frame length. |
| int fl_increase_overhead_offset; |
| // Offset to apply to overhead calculation when decreasing frame length. |
| int fl_decrease_overhead_offset; |
| std::map<FrameLengthChange, int> fl_changing_bandwidths_bps; |
| }; |
| |
| explicit FrameLengthController(const Config& config); |
| |
| ~FrameLengthController() override; |
| |
| FrameLengthController(const FrameLengthController&) = delete; |
| FrameLengthController& operator=(const FrameLengthController&) = delete; |
| |
| void UpdateNetworkMetrics(const NetworkMetrics& network_metrics) override; |
| |
| void MakeDecision(AudioEncoderRuntimeConfig* config) override; |
| |
| private: |
| bool FrameLengthIncreasingDecision(const AudioEncoderRuntimeConfig& config); |
| |
| bool FrameLengthDecreasingDecision(const AudioEncoderRuntimeConfig& config); |
| |
| const Config config_; |
| |
| std::set<int>::const_iterator frame_length_ms_; |
| |
| absl::optional<int> uplink_bandwidth_bps_; |
| |
| absl::optional<float> uplink_packet_loss_fraction_; |
| |
| absl::optional<size_t> overhead_bytes_per_packet_; |
| |
| // True if the previous frame length decision was an increase, otherwise |
| // false. |
| bool prev_decision_increase_ = false; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_FRAME_LENGTH_CONTROLLER_H_ |