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/*
* 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_FEC_CONTROLLER_PLR_BASED_H_
#define MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_FEC_CONTROLLER_PLR_BASED_H_
#include <memory>
#include "absl/types/optional.h"
#include "common_audio/smoothing_filter.h"
#include "modules/audio_coding/audio_network_adaptor/controller.h"
#include "modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor_config.h"
#include "modules/audio_coding/audio_network_adaptor/util/threshold_curve.h"
namespace webrtc {
class FecControllerPlrBased final : public Controller {
public:
struct Config {
// `fec_enabling_threshold` defines a curve, above which FEC should be
// enabled. `fec_disabling_threshold` defines a curve, under which FEC
// should be disabled. See below
//
// packet-loss ^ | |
// | | | FEC
// | \ \ ON
// | FEC \ \_______ fec_enabling_threshold
// | OFF \_________ fec_disabling_threshold
// |-----------------> bandwidth
Config(bool initial_fec_enabled,
const ThresholdCurve& fec_enabling_threshold,
const ThresholdCurve& fec_disabling_threshold,
int time_constant_ms);
bool initial_fec_enabled;
ThresholdCurve fec_enabling_threshold;
ThresholdCurve fec_disabling_threshold;
int time_constant_ms;
};
// Dependency injection for testing.
FecControllerPlrBased(const Config& config,
std::unique_ptr<SmoothingFilter> smoothing_filter);
explicit FecControllerPlrBased(const Config& config);
~FecControllerPlrBased() override;
FecControllerPlrBased(const FecControllerPlrBased&) = delete;
FecControllerPlrBased& operator=(const FecControllerPlrBased&) = delete;
void UpdateNetworkMetrics(const NetworkMetrics& network_metrics) override;
void MakeDecision(AudioEncoderRuntimeConfig* config) override;
private:
bool FecEnablingDecision(const absl::optional<float>& packet_loss) const;
bool FecDisablingDecision(const absl::optional<float>& packet_loss) const;
const Config config_;
bool fec_enabled_;
absl::optional<int> uplink_bandwidth_bps_;
const std::unique_ptr<SmoothingFilter> packet_loss_smoother_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_FEC_CONTROLLER_PLR_BASED_H_
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