media/audio/mac/aggregate_device_manager.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_AUDIO_MAC_AGGREGATE_DEVICE_MANAGER_H_
   6 #define MEDIA_AUDIO_MAC_AGGREGATE_DEVICE_MANAGER_H_
   7
   8 #include <CoreAudio/CoreAudio.h>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "media/base/media_export.h"
  13
  14 namespace media {
  15
  16 class MEDIA_EXPORT AggregateDeviceManager {
  17  public:
  18   AggregateDeviceManager();
  19   ~AggregateDeviceManager();
  20
  21   // Lazily creates an aggregate device based on the default
  22   // input and output devices.
  23   // It will either return a valid device or kAudioDeviceUnknown
  24   // if the default devices are not suitable for aggregate devices.
  25   AudioDeviceID GetDefaultAggregateDevice();
  26
  27  private:
  28   // The caller is responsible for releasing the CFStringRef.
  29   static CFStringRef GetDeviceUID(AudioDeviceID id);
  30
  31   static void GetDeviceName(AudioDeviceID id, char* name, UInt32 size);
  32   static UInt32 GetClockDomain(AudioDeviceID device_id);
  33   static OSStatus GetPluginID(AudioObjectID* id);
  34
  35   CFMutableDictionaryRef CreateAggregateDeviceDictionary(
  36       AudioDeviceID input_id,
  37       AudioDeviceID output_id);
  38
  39   CFMutableArrayRef CreateSubDeviceArray(CFStringRef input_device_UID,
  40                                          CFStringRef output_device_UID);
  41
  42   OSStatus CreateAggregateDevice(AudioDeviceID input_id,
  43                                  AudioDeviceID output_id,
  44                                  AudioDeviceID* aggregate_device);
  45   void DestroyAggregateDevice();
  46
  47   AudioObjectID plugin_id_;
  48   AudioDeviceID input_device_;
  49   AudioDeviceID output_device_;
  50
  51   AudioDeviceID aggregate_device_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(AggregateDeviceManager);
  54 };
  55
  56 }  // namespace media
  57
  58 #endif  // MEDIA_AUDIO_MAC_AGGREGATE_DEVICE_MANAGER_H_