src/chrome/browser/ui/ash/volume_controller_chromeos.cc

   1 // Copyright (c) 2012 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 "chrome/browser/ui/ash/volume_controller_chromeos.h"
   6
   7 #include "ash/ash_switches.h"
   8 #include "ash/audio/sounds.h"
   9 #include "base/command_line.h"
  10 #include "chrome/browser/browser_process.h"
  11 #include "chrome/browser/extensions/api/system_private/system_private_api.h"
  12 #include "chromeos/audio/chromeos_sounds.h"
  13 #include "chromeos/chromeos_switches.h"
  14 #include "content/public/browser/user_metrics.h"
  15 #include "grit/browser_resources.h"
  16 #include "media/audio/sounds/sounds_manager.h"
  17 #include "ui/base/resource/resource_bundle.h"
  18
  19 using chromeos::CrasAudioHandler;
  20
  21 namespace {
  22
  23 // Percent by which the volume should be changed when a volume key is pressed.
  24 const double kStepPercentage = 4.0;
  25
  26 bool VolumeAdjustSoundEnabled() {
  27   return !CommandLine::ForCurrentProcess()->HasSwitch(
  28       chromeos::switches::kDisableVolumeAdjustSound);
  29 }
  30
  31 void PlayVolumeAdjustSound() {
  32   if (VolumeAdjustSoundEnabled())
  33     ash::PlaySystemSoundIfSpokenFeedback(chromeos::SOUND_VOLUME_ADJUST);
  34 }
  35
  36 }  // namespace
  37
  38 VolumeController::VolumeController() {
  39   CrasAudioHandler::Get()->AddAudioObserver(this);
  40   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
  41   if (VolumeAdjustSoundEnabled()) {
  42     media::SoundsManager::Get()->Initialize(
  43         chromeos::SOUND_VOLUME_ADJUST,
  44         bundle.GetRawDataResource(IDR_SOUND_VOLUME_ADJUST_WAV));
  45   }
  46 }
  47
  48 VolumeController::~VolumeController() {
  49   if (CrasAudioHandler::IsInitialized())
  50     CrasAudioHandler::Get()->RemoveAudioObserver(this);
  51 }
  52
  53 bool VolumeController::HandleVolumeMute(const ui::Accelerator& accelerator) {
  54   if (accelerator.key_code() == ui::VKEY_VOLUME_MUTE)
  55     content::RecordAction(base::UserMetricsAction("Accel_VolumeMute_F8"));
  56
  57   CrasAudioHandler::Get()->SetOutputMute(true);
  58   return true;
  59 }
  60
  61 bool VolumeController::HandleVolumeDown(const ui::Accelerator& accelerator) {
  62   if (accelerator.key_code() == ui::VKEY_VOLUME_DOWN)
  63     content::RecordAction(base::UserMetricsAction("Accel_VolumeDown_F9"));
  64
  65   CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
  66   if (audio_handler->IsOutputMuted()) {
  67     audio_handler->SetOutputVolumePercent(0);
  68   } else {
  69     audio_handler->AdjustOutputVolumeByPercent(-kStepPercentage);
  70     if (audio_handler->IsOutputVolumeBelowDefaultMuteLevel())
  71       audio_handler->SetOutputMute(true);
  72     else
  73       PlayVolumeAdjustSound();
  74   }
  75   return true;
  76 }
  77
  78 bool VolumeController::HandleVolumeUp(const ui::Accelerator& accelerator) {
  79   if (accelerator.key_code() == ui::VKEY_VOLUME_UP)
  80     content::RecordAction(base::UserMetricsAction("Accel_VolumeUp_F10"));
  81
  82   CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
  83   bool play_sound = false;
  84   if (audio_handler->IsOutputMuted()) {
  85     audio_handler->SetOutputMute(false);
  86     audio_handler->AdjustOutputVolumeToAudibleLevel();
  87     play_sound = true;
  88   } else {
  89     play_sound = audio_handler->GetOutputVolumePercent() != 100;
  90     audio_handler->AdjustOutputVolumeByPercent(kStepPercentage);
  91   }
  92
  93   if (play_sound)
  94     PlayVolumeAdjustSound();
  95   return true;
  96 }
  97
  98 void VolumeController::OnOutputVolumeChanged() {
  99   CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
 100   extensions::DispatchVolumeChangedEvent(
 101       audio_handler->GetOutputVolumePercent(),
 102       audio_handler->IsOutputMuted());
 103 }
 104
 105 void VolumeController::OnOutputMuteChanged() {
 106   CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
 107   extensions::DispatchVolumeChangedEvent(
 108       audio_handler->GetOutputVolumePercent(),
 109       audio_handler->IsOutputMuted());
 110 }