audio_device: Add lineout node type

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>
 #include <string>
 #include <vector>
 
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/audio_node.h"
 
 namespace chromeos {
 
 // Ordered from the highest priority to the lowest.
 enum AudioDeviceType {
   AUDIO_TYPE_HEADPHONE,
   AUDIO_TYPE_MIC,
   AUDIO_TYPE_USB,
   AUDIO_TYPE_BLUETOOTH,
   AUDIO_TYPE_HDMI,
   AUDIO_TYPE_INTERNAL_SPEAKER,
   AUDIO_TYPE_INTERNAL_MIC,
   AUDIO_TYPE_KEYBOARD_MIC,
   AUDIO_TYPE_HOTWORD,
+  AUDIO_TYPE_LINEOUT,
   AUDIO_TYPE_POST_MIX_LOOPBACK,
   AUDIO_TYPE_POST_DSP_LOOPBACK,
   AUDIO_TYPE_OTHER,
 };
 
 struct CHROMEOS_EXPORT AudioDevice {
   AudioDevice();
   explicit AudioDevice(const AudioNode& node);
   AudioDevice(const AudioDevice& other);
   std::string ToString() const;
 
   // Converts between the string type sent via D-Bus and AudioDeviceType.
   // Static so they can be used by tests.
   static std::string GetTypeString(chromeos::AudioDeviceType type);
   static chromeos::AudioDeviceType GetAudioType(const std::string& node_type);
 
   // Indicates that an input or output audio device is for simple usage like
   // playback or recording for user. In contrast, audio device such as
   // loopback, always on keyword recognition (HOTWORD), and keyboard mic are
   // not for simple usage.
   bool is_for_simple_usage() const {
     return (type == AUDIO_TYPE_HEADPHONE ||
             type == AUDIO_TYPE_INTERNAL_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_INTERNAL_SPEAKER ||
+            type == AUDIO_TYPE_LINEOUT);
   }
 
   bool is_input;
 
   // 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
@@ skipping 31 matching lines @@
       return true;
     } else {
       return false;
     }
   }
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_AUDIO_AUDIO_DEVICE_H_