/*
 *  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 API_AUDIO_ECHO_CANCELLER3_FACTORY_H_
#define API_AUDIO_ECHO_CANCELLER3_FACTORY_H_

#include <memory>
#include <optional>

#include "absl/base/nullability.h"
#include "api/audio/echo_canceller3_config.h"
#include "api/audio/echo_control.h"
#include "api/audio/neural_residual_echo_estimator.h"
#include "api/environment/environment.h"
#include "rtc_base/system/rtc_export.h"

namespace webrtc {

class RTC_EXPORT EchoCanceller3Factory : public EchoControlFactory {
 public:
  // Factory producing EchoCanceller3 instances with the default configuration.
  EchoCanceller3Factory();

  // Factory producing EchoCanceller3 instances with the specified
  // configuration.
  explicit EchoCanceller3Factory(const EchoCanceller3Config& config);

  // Factory producing EchoCanceller3 instances with the specified
  // configuration and multichannel configuration.
  EchoCanceller3Factory(
      const EchoCanceller3Config& config,
      std::optional<EchoCanceller3Config> multichannel_config);

  // Creates an EchoCanceller3 with a specified channel count and sampling rate.
  absl_nonnull std::unique_ptr<EchoControl> Create(
      const Environment& env,
      int sample_rate_hz,
      int num_render_channels,
      int num_capture_channels) override;

  // Creates an EchoCanceller3 with a specified channel count and sampling rate.
  // If provided, `neural_residual_echo_estimator` is used to estimate the
  // residual echo.
  absl_nonnull std::unique_ptr<EchoControl> Create(
      const Environment& env,
      int sample_rate_hz,
      int num_render_channels,
      int num_capture_channels,
      NeuralResidualEchoEstimator* neural_residual_echo_estimator) override;

 private:
  const EchoCanceller3Config config_;
  const std::optional<EchoCanceller3Config> multichannel_config_;
};
}  // namespace webrtc

#endif  // API_AUDIO_ECHO_CANCELLER3_FACTORY_H_