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

chromeos/audio/audio_device.cc

 // 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.
 
 #include "chromeos/audio/audio_device.h"
 
 #include <stdint.h>
 
 #include "base/format_macros.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 168 matching lines @@
                       "active = %s ",
                       active ? "true" : "false");
   base::StringAppendF(&result,
                       "plugged_time= %s ",
                       base::Uint64ToString(plugged_time).c_str());
   base::StringAppendF(&result, "mic_positions = %s ", mic_positions.c_str());
 
   return result;
 }
 
+bool AudioDevice::IsExternalDevice() const {
+  if (!is_for_simple_usage())
+    return false;
+
+  if (is_input) {
+    return (type != AUDIO_TYPE_INTERNAL_MIC && type != AUDIO_TYPE_FRONT_MIC &&
+            type != AUDIO_TYPE_REAR_MIC);
+  } else {
+    return (type != AUDIO_TYPE_INTERNAL_SPEAKER);
+  }
+}
+
 }  // namespace chromeos