extensions/shell/browser/shell_audio_controller_chromeos.cc

   1 // Copyright 2014 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 #include "extensions/shell/browser/shell_audio_controller_chromeos.h"
   6
   7 #include <algorithm>
   8
   9 #include "chromeos/audio/audio_device.h"
  10
  11 namespace extensions {
  12
  13 namespace {
  14
  15 // Default output and input volume.
  16 const double kOutputVolumePercent = 100.0;
  17 const double kInputGainPercent = 100.0;
  18
  19 // Returns a pointer to the device in |devices| with ID |node_id|, or NULL if it
  20 // isn't present.
  21 const chromeos::AudioDevice* GetDevice(const chromeos::AudioDeviceList& devices,
  22                                        uint64 node_id) {
  23   for (chromeos::AudioDeviceList::const_iterator it = devices.begin();
  24        it != devices.end(); ++it) {
  25     if (it->id == node_id)
  26       return &(*it);
  27   }
  28   return NULL;
  29 }
  30
  31 }  // namespace
  32
  33 ShellAudioController::PrefHandler::PrefHandler() {}
  34
  35 double ShellAudioController::PrefHandler::GetOutputVolumeValue(
  36     const chromeos::AudioDevice* device) {
  37   return kOutputVolumePercent;
  38 }
  39
  40 double ShellAudioController::PrefHandler::GetInputGainValue(
  41     const chromeos::AudioDevice* device) {
  42   return kInputGainPercent;
  43 }
  44
  45 void ShellAudioController::PrefHandler::SetVolumeGainValue(
  46     const chromeos::AudioDevice& device,
  47     double value) {
  48   // TODO(derat): Shove volume and mute prefs into a map so we can at least
  49   // honor changes that are made at runtime.
  50 }
  51
  52 bool ShellAudioController::PrefHandler::GetMuteValue(
  53     const chromeos::AudioDevice& device) {
  54   return false;
  55 }
  56
  57 void ShellAudioController::PrefHandler::SetMuteValue(
  58     const chromeos::AudioDevice& device,
  59     bool mute_on) {}
  60
  61 bool ShellAudioController::PrefHandler::GetAudioCaptureAllowedValue() {
  62   return true;
  63 }
  64
  65 bool ShellAudioController::PrefHandler::GetAudioOutputAllowedValue() {
  66   return true;
  67 }
  68
  69 void ShellAudioController::PrefHandler::AddAudioPrefObserver(
  70     chromeos::AudioPrefObserver* observer) {}
  71
  72 void ShellAudioController::PrefHandler::RemoveAudioPrefObserver(
  73     chromeos::AudioPrefObserver* observer) {}
  74
  75 ShellAudioController::PrefHandler::~PrefHandler() {}
  76
  77 ShellAudioController::ShellAudioController() {
  78   chromeos::CrasAudioHandler::Get()->AddAudioObserver(this);
  79   ActivateDevices();
  80 }
  81
  82 ShellAudioController::~ShellAudioController() {
  83   chromeos::CrasAudioHandler::Get()->RemoveAudioObserver(this);
  84 }
  85
  86 void ShellAudioController::OnOutputVolumeChanged() {}
  87
  88 void ShellAudioController::OnOutputMuteChanged() {}
  89
  90 void ShellAudioController::OnInputGainChanged() {}
  91
  92 void ShellAudioController::OnInputMuteChanged() {}
  93
  94 void ShellAudioController::OnAudioNodesChanged() {
  95   VLOG(1) << "Audio nodes changed";
  96   ActivateDevices();
  97 }
  98
  99 void ShellAudioController::OnActiveOutputNodeChanged() {}
 100
 101 void ShellAudioController::OnActiveInputNodeChanged() {}
 102
 103 void ShellAudioController::ActivateDevices() {
 104   chromeos::CrasAudioHandler* handler = chromeos::CrasAudioHandler::Get();
 105   chromeos::AudioDeviceList devices;
 106   handler->GetAudioDevices(&devices);
 107   sort(devices.begin(), devices.end(), chromeos::AudioDeviceCompare());
 108
 109   uint64 best_input = 0, best_output = 0;
 110   for (chromeos::AudioDeviceList::const_reverse_iterator it = devices.rbegin();
 111        it != devices.rend() && (!best_input || !best_output); ++it) {
 112     // TODO(derat): Need to check |plugged_time|?
 113     if (it->is_input && !best_input)
 114       best_input = it->id;
 115     else if (!it->is_input && !best_output)
 116       best_output = it->id;
 117   }
 118
 119   if (best_input && best_input != handler->GetPrimaryActiveInputNode()) {
 120     const chromeos::AudioDevice* device = GetDevice(devices, best_input);
 121     DCHECK(device);
 122     VLOG(1) << "Activating input device: " << device->ToString();
 123     handler->SwitchToDevice(*device);
 124   }
 125   if (best_output && best_output != handler->GetPrimaryActiveOutputNode()) {
 126     const chromeos::AudioDevice* device = GetDevice(devices, best_output);
 127     DCHECK(device);
 128     VLOG(1) << "Activating output device: " << device->ToString();
 129     handler->SwitchToDevice(*device);
 130   }
 131 }
 132
 133 }  // namespace extensions