components/mirroring/service/captured_audio_input.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_MIRRORING_SERVICE_CAPTURED_AUDIO_INPUT_H_
#define COMPONENTS_MIRRORING_SERVICE_CAPTURED_AUDIO_INPUT_H_

#include <string_view>

#include "base/component_export.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/sequence_checker.h"
#include "components/mirroring/mojom/resource_provider.mojom.h"
#include "components/mirroring/mojom/session_observer.mojom-forward.h"
#include "components/mirroring/service/mirroring_logger.h"
#include "media/audio/audio_input_ipc.h"
#include "media/mojo/mojom/audio_input_stream.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"

namespace mirroring {

// CapturedAudioInput handles the creation, initialization and control of an
// audio input stream created by Audio Service.
class COMPONENT_EXPORT(MIRRORING_SERVICE) CapturedAudioInput final
    : public media::AudioInputIPC,
      public mojom::AudioStreamCreatorClient,
      public media::mojom::AudioInputStreamClient {
 public:
  using StreamCreatorCallback = base::RepeatingCallback<void(
      mojo::PendingRemote<mojom::AudioStreamCreatorClient> client,
      const media::AudioParameters& params,
      uint32_t total_segments)>;
  CapturedAudioInput(StreamCreatorCallback callback,
                     mojo::Remote<mojom::SessionObserver>& observer);

  CapturedAudioInput(const CapturedAudioInput&) = delete;
  CapturedAudioInput& operator=(const CapturedAudioInput&) = delete;

  ~CapturedAudioInput() override;

 private:
  // media::AudioInputIPC implementation.
  void CreateStream(media::AudioInputIPCDelegate* delegate,
                    const media::AudioParameters& params,
                    bool automatic_gain_control,
                    uint32_t total_segments) override;
  void RecordStream() override;
  void SetVolume(double volume) override;
  void CloseStream() override;
  void SetOutputDeviceForAec(const std::string& output_device_id) override;

  // mojom::AudioStreamCreatorClient implementation
  void StreamCreated(
      mojo::PendingRemote<media::mojom::AudioInputStream> stream,
      mojo::PendingReceiver<media::mojom::AudioInputStreamClient>
          client_receiver,
      media::mojom::ReadWriteAudioDataPipePtr data_pipe) override;

  // media::mojom::AudioInputStreamClient implementation.
  void OnError(media::mojom::InputStreamErrorCode code) override;
  void OnMutedStateChanged(bool is_muted) override;

  SEQUENCE_CHECKER(sequence_checker_);

  const StreamCreatorCallback stream_creator_callback_;
  mojo::Receiver<media::mojom::AudioInputStreamClient> stream_client_receiver_{
      this};
  mojo::Receiver<mojom::AudioStreamCreatorClient>
      stream_creator_client_receiver_{this};
  raw_ptr<media::AudioInputIPCDelegate> delegate_ = nullptr;
  mojo::Remote<media::mojom::AudioInputStream> stream_;
  MirroringLogger logger_;
};

}  // namespace mirroring

#endif  // COMPONENTS_MIRRORING_SERVICE_CAPTURED_AUDIO_INPUT_H_