chromeos/audio/audio_device.h

   1 // Copyright (c) 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 CHROMEOS_AUDIO_AUDIO_DEVICE_H_
   6 #define CHROMEOS_AUDIO_AUDIO_DEVICE_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/basictypes.h"
  13 #include "chromeos/chromeos_export.h"
  14 #include "chromeos/dbus/audio_node.h"
  15
  16 namespace chromeos {
  17
  18 // Ordered from the highest priority to the lowest.
  19 enum AudioDeviceType {
  20   AUDIO_TYPE_HEADPHONE,
  21   AUDIO_TYPE_MIC,
  22   AUDIO_TYPE_USB,
  23   AUDIO_TYPE_BLUETOOTH,
  24   AUDIO_TYPE_HDMI,
  25   AUDIO_TYPE_INTERNAL_SPEAKER,
  26   AUDIO_TYPE_INTERNAL_MIC,
  27   AUDIO_TYPE_KEYBOARD_MIC,
  28   AUDIO_TYPE_OTHER,
  29 };
  30
  31 struct CHROMEOS_EXPORT AudioDevice {
  32   bool is_input;
  33   uint64 id;
  34   std::string display_name;
  35   std::string device_name;
  36   AudioDeviceType type;
  37   uint8 priority;
  38   bool active;
  39   uint64 plugged_time;
  40
  41   AudioDevice();
  42   explicit AudioDevice(const AudioNode& node);
  43   std::string ToString() const;
  44 };
  45
  46 typedef std::vector<AudioDevice> AudioDeviceList;
  47 typedef std::map<uint64, AudioDevice> AudioDeviceMap;
  48
  49 struct AudioDeviceCompare {
  50   // Rules used to discern which device is higher,
  51   // 1.) Device Type:
  52   //       [Headphones/USB/Bluetooh > HDMI > Internal Speakers]
  53   //       [External Mic/USB Mic/Bluetooth > Internal Mic]
  54   // 2.) Device Plugged in Time:
  55   //       [Later > Earlier]
  56   bool operator()(const chromeos::AudioDevice& a,
  57                   const chromeos::AudioDevice& b) const {
  58     if (a.priority < b.priority) {
  59       return true;
  60     } else if (b.priority < a.priority) {
  61       return false;
  62     } else if (a.plugged_time < b.plugged_time) {
  63       return true;
  64     } else {
  65       return false;
  66     }
  67   }
  68 };
  69
  70 }  // namespace chromeos
  71
  72 #endif  // CHROMEOS_AUDIO_AUDIO_DEVICE_H_