media/audio/fuchsia/audio_manager_fuchsia.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_AUDIO_FUCHSIA_AUDIO_MANAGER_FUCHSIA_H_
#define MEDIA_AUDIO_FUCHSIA_AUDIO_MANAGER_FUCHSIA_H_

#include "media/audio/audio_manager_base.h"

#include <fuchsia/media/cpp/fidl.h>

#include <map>

namespace media {

class AudioManagerFuchsia : public AudioManagerBase {
 public:
  AudioManagerFuchsia(std::unique_ptr<AudioThread> audio_thread,
                      AudioLogFactory* audio_log_factory);

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

  ~AudioManagerFuchsia() override;

  // Implementation of AudioManager.
  void ShutdownOnAudioThread() override;
  bool HasAudioOutputDevices() override;
  bool HasAudioInputDevices() override;
  void GetAudioInputDeviceNames(AudioDeviceNames* device_names) override;
  void GetAudioOutputDeviceNames(AudioDeviceNames* device_names) override;
  AudioParameters GetInputStreamParameters(
      const std::string& device_id) override;
  const char* GetName() override;

  // Implementation of AudioManagerBase.
  AudioOutputStream* MakeLinearOutputStream(
      const AudioParameters& params,
      const LogCallback& log_callback) override;
  AudioOutputStream* MakeLowLatencyOutputStream(
      const AudioParameters& params,
      const std::string& device_id,
      const LogCallback& log_callback) override;
  AudioInputStream* MakeLinearInputStream(
      const AudioParameters& params,
      const std::string& device_id,
      const LogCallback& log_callback) override;
  AudioInputStream* MakeLowLatencyInputStream(
      const AudioParameters& params,
      const std::string& device_id,
      const LogCallback& log_callback) override;

 protected:
  AudioParameters GetPreferredOutputStreamParameters(
      const std::string& output_device_id,
      const AudioParameters& input_params) override;

 private:
  AudioInputStream* MakeInputStream(const AudioParameters& input_params,
                                    const std::string& device_id);

  // Initialize the `enumerator_` and the `audio_devices_` on the audio thread.
  void InitOnAudioThread();

  // Events from ::fuchsia::media::AudioDeviceEnumerator
  void OnDeviceAdded(::fuchsia::media::AudioDeviceInfo device_info);
  void OnDeviceRemoved(uint64_t device_token);

  bool HasAudioDevice(bool is_input);
  void GetAudioDevices(AudioDeviceNames* device_names, bool is_input);

  ::fuchsia::media::AudioDeviceEnumeratorPtr enumerator_;
  std::map<uint64_t, ::fuchsia::media::AudioDeviceInfo> audio_devices_;
};

}  // namespace media

#endif  // MEDIA_AUDIO_FUCHSIA_AUDIO_MANAGER_FUCHSIA_H_