/*
 *  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_CHANNEL_CONTROLLER_H_
#define MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_CHANNEL_CONTROLLER_H_

#include <stddef.h>

#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"
#include "rtc_base/constructor_magic.h"

namespace webrtc {

class ChannelController final : public Controller {
 public:
  struct Config {
    Config(size_t num_encoder_channels,
           size_t intial_channels_to_encode,
           int channel_1_to_2_bandwidth_bps,
           int channel_2_to_1_bandwidth_bps);
    size_t num_encoder_channels;
    size_t intial_channels_to_encode;
    // Uplink bandwidth above which the number of encoded channels should switch
    // from 1 to 2.
    int channel_1_to_2_bandwidth_bps;
    // Uplink bandwidth below which the number of encoded channels should switch
    // from 2 to 1.
    int channel_2_to_1_bandwidth_bps;
  };

  explicit ChannelController(const Config& config);

  ~ChannelController() override;

  void UpdateNetworkMetrics(const NetworkMetrics& network_metrics) override;

  void MakeDecision(AudioEncoderRuntimeConfig* config) override;

 private:
  const Config config_;
  size_t channels_to_encode_;
  absl::optional<int> uplink_bandwidth_bps_;
  RTC_DISALLOW_COPY_AND_ASSIGN(ChannelController);
};

}  // namespace webrtc

#endif  // MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_CHANNEL_CONTROLLER_H_