text: /*
   *  Copyright (c) 2011 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 AUDIO_DEVICE_AUDIO_MIXER_MANAGER_MAC_H_
  #define AUDIO_DEVICE_AUDIO_MIXER_MANAGER_MAC_H_
  
  #include "modules/audio_device/include/audio_device.h"
  #include "rtc_base/criticalsection.h"
  #include "rtc_base/logging.h"
  #include "typedefs.h"  // NOLINT(build/include)
  
  #include <CoreAudio/CoreAudio.h>
  
  namespace webrtc {
  
  class AudioMixerManagerMac {
   public:
    int32_t OpenSpeaker(AudioDeviceID deviceID);
    int32_t OpenMicrophone(AudioDeviceID deviceID);
    int32_t SetSpeakerVolume(uint32_t volume);
    int32_t SpeakerVolume(uint32_t& volume) const;
    int32_t MaxSpeakerVolume(uint32_t& maxVolume) const;
    int32_t MinSpeakerVolume(uint32_t& minVolume) const;
    int32_t SpeakerVolumeIsAvailable(bool& available);
    int32_t SpeakerMuteIsAvailable(bool& available);
    int32_t SetSpeakerMute(bool enable);
    int32_t SpeakerMute(bool& enabled) const;
    int32_t StereoPlayoutIsAvailable(bool& available);
    int32_t StereoRecordingIsAvailable(bool& available);
    int32_t MicrophoneMuteIsAvailable(bool& available);
    int32_t SetMicrophoneMute(bool enable);
    int32_t MicrophoneMute(bool& enabled) const;
    int32_t MicrophoneVolumeIsAvailable(bool& available);
    int32_t SetMicrophoneVolume(uint32_t volume);
    int32_t MicrophoneVolume(uint32_t& volume) const;
    int32_t MaxMicrophoneVolume(uint32_t& maxVolume) const;
    int32_t MinMicrophoneVolume(uint32_t& minVolume) const;
    int32_t Close();
    int32_t CloseSpeaker();
    int32_t CloseMicrophone();
    bool SpeakerIsInitialized() const;
    bool MicrophoneIsInitialized() const;
  
   public:
    AudioMixerManagerMac();
    ~AudioMixerManagerMac();
  
   private:
    static void logCAMsg(const rtc::LoggingSeverity sev,
                         const char* msg,
                         const char* err);
  
   private:
    rtc::CriticalSection _critSect;
  
    AudioDeviceID _inputDeviceID;
    AudioDeviceID _outputDeviceID;
  
    uint16_t _noInputChannels;
    uint16_t _noOutputChannels;
  };
  
  }  // namespace webrtc
  
  #endif  // AUDIO_MIXER_MAC_H
  