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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_CONTROLLER_MANAGER_H_
#define MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_CONTROLLER_MANAGER_H_
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "absl/strings/string_view.h"
#include "modules/audio_coding/audio_network_adaptor/controller.h"
namespace webrtc {
class DebugDumpWriter;
class ControllerManager {
public:
virtual ~ControllerManager() = default;
// Sort controllers based on their significance.
virtual std::vector<Controller*> GetSortedControllers(
const Controller::NetworkMetrics& metrics) = 0;
virtual std::vector<Controller*> GetControllers() const = 0;
};
class ControllerManagerImpl final : public ControllerManager {
public:
struct Config {
Config(int min_reordering_time_ms, float min_reordering_squared_distance);
~Config();
// Least time since last reordering for a new reordering to be made.
int min_reordering_time_ms;
// Least squared distance from last scoring point for a new reordering to be
// made.
float min_reordering_squared_distance;
};
static std::unique_ptr<ControllerManager> Create(
absl::string_view config_string,
size_t num_encoder_channels,
rtc::ArrayView<const int> encoder_frame_lengths_ms,
int min_encoder_bitrate_bps,
size_t intial_channels_to_encode,
int initial_frame_length_ms,
int initial_bitrate_bps,
bool initial_fec_enabled,
bool initial_dtx_enabled);
static std::unique_ptr<ControllerManager> Create(
absl::string_view config_string,
size_t num_encoder_channels,
rtc::ArrayView<const int> encoder_frame_lengths_ms,
int min_encoder_bitrate_bps,
size_t intial_channels_to_encode,
int initial_frame_length_ms,
int initial_bitrate_bps,
bool initial_fec_enabled,
bool initial_dtx_enabled,
DebugDumpWriter* debug_dump_writer);
explicit ControllerManagerImpl(const Config& config);
// Dependency injection for testing.
ControllerManagerImpl(
const Config& config,
std::vector<std::unique_ptr<Controller>> controllers,
const std::map<const Controller*, std::pair<int, float>>&
chracteristic_points);
~ControllerManagerImpl() override;
ControllerManagerImpl(const ControllerManagerImpl&) = delete;
ControllerManagerImpl& operator=(const ControllerManagerImpl&) = delete;
// Sort controllers based on their significance.
std::vector<Controller*> GetSortedControllers(
const Controller::NetworkMetrics& metrics) override;
std::vector<Controller*> GetControllers() const override;
private:
// Scoring point is a subset of NetworkMetrics that is used for comparing the
// significance of controllers.
struct ScoringPoint {
// TODO(eladalon): Do we want to experiment with RPLR-based scoring?
ScoringPoint(int uplink_bandwidth_bps, float uplink_packet_loss_fraction);
// Calculate the normalized [0,1] distance between two scoring points.
float SquaredDistanceTo(const ScoringPoint& scoring_point) const;
int uplink_bandwidth_bps;
float uplink_packet_loss_fraction;
};
const Config config_;
std::vector<std::unique_ptr<Controller>> controllers_;
absl::optional<int64_t> last_reordering_time_ms_;
ScoringPoint last_scoring_point_;
std::vector<Controller*> default_sorted_controllers_;
std::vector<Controller*> sorted_controllers_;
// `scoring_points_` saves the scoring points of various
// controllers.
std::map<const Controller*, ScoringPoint> controller_scoring_points_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_CONTROLLER_MANAGER_H_
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