Handle the dual microphones and dual cameras cases. Activate the proper microphone when user activa…

chromeos/audio/audio_device.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMEOS_AUDIO_AUDIO_DEVICE_H_
 #define CHROMEOS_AUDIO_AUDIO_DEVICE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 45 matching lines @@
             type == AUDIO_TYPE_FRONT_MIC ||
             type == AUDIO_TYPE_REAR_MIC ||
             type == AUDIO_TYPE_MIC ||
             type == AUDIO_TYPE_USB ||
             type == AUDIO_TYPE_BLUETOOTH ||
             type == AUDIO_TYPE_HDMI ||
             type == AUDIO_TYPE_INTERNAL_SPEAKER ||
             type == AUDIO_TYPE_LINEOUT);
   }
 
+  bool IsExternalDevice() const;
+
   bool is_input = false;
 
   // Id of this audio device. The legacy |id| is assigned to be unique everytime
   // when each device got plugged, so that the same physical device will have
   // a different id after unplug then re-plug.
   // The |stable_device_id| is designed to be persistent across system reboot
   // and plug/unplug for the same physical device. It is guaranteed that
   // different type of hardware has different |stable_device_id|, but not
   // guaranteed to be different between the same kind of audio device, e.g
   // USB headset. |id| and |stable_device_id| can be used together to achieve
@@ skipping 38 matching lines @@
       return true;
     } else {
       return false;
     }
   }
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_AUDIO_AUDIO_DEVICE_H_