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 void PlayVolumeAdjustSound() {
  27   if (CommandLine::ForCurrentProcess()->HasSwitch(
  28           chromeos::switches::kEnableVolumeAdjustSound)) {
  29     ash::PlaySystemSound(chromeos::SOUND_VOLUME_ADJUST,
  30                          true /* honor_spoken_feedback */);
  31   }
  32 }
  33
  34 }  // namespace
  35
  36 VolumeController::VolumeController() {
  37   CrasAudioHandler::Get()->AddAudioObserver(this);
  38   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
  39   media::SoundsManager::Get()->Initialize(
  40       chromeos::SOUND_VOLUME_ADJUST,
  41       bundle.GetRawDataResource(IDR_SOUND_VOLUME_ADJUST_WAV));
  42 }
  43
  44 VolumeController::~VolumeController() {
  45   if (CrasAudioHandler::IsInitialized())
  46     CrasAudioHandler::Get()->RemoveAudioObserver(this);
  47 }
  48
  49 bool VolumeController::HandleVolumeMute(const ui::Accelerator& accelerator) {
  50   if (accelerator.key_code() == ui::VKEY_VOLUME_MUTE)
  51     content::RecordAction(base::UserMetricsAction("Accel_VolumeMute_F8"));
  52
  53   CrasAudioHandler::Get()->SetOutputMute(true);
  54   return true;
  55 }
  56
  57 bool VolumeController::HandleVolumeDown(const ui::Accelerator& accelerator) {
  58   if (accelerator.key_code() == ui::VKEY_VOLUME_DOWN)
  59     content::RecordAction(base::UserMetricsAction("Accel_VolumeDown_F9"));
  60
  61   CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
  62   if (audio_handler->IsOutputMuted()) {
  63     audio_handler->SetOutputVolumePercent(0);
  64   } else {
  65     audio_handler->AdjustOutputVolumeByPercent(-kStepPercentage);
  66     if (audio_handler->IsOutputVolumeBelowDefaultMuteLvel())
  67       audio_handler->SetOutputMute(true);
  68     else
  69       PlayVolumeAdjustSound();
  70   }
  71   return true;
  72 }
  73
  74 bool VolumeController::HandleVolumeUp(const ui::Accelerator& accelerator) {
  75   if (accelerator.key_code() == ui::VKEY_VOLUME_UP)
  76     content::RecordAction(base::UserMetricsAction("Accel_VolumeUp_F10"));
  77
  78   CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
  79   bool play_sound = false;
  80   if (audio_handler->IsOutputMuted()) {
  81     audio_handler->SetOutputMute(false);
  82     audio_handler->AdjustOutputVolumeToAudibleLevel();
  83     play_sound = true;
  84   } else {
  85     play_sound = audio_handler->GetOutputVolumePercent() != 100;
  86     audio_handler->AdjustOutputVolumeByPercent(kStepPercentage);
  87   }
  88
  89   if (play_sound)
  90     PlayVolumeAdjustSound();
  91   return true;
  92 }
  93
  94 void VolumeController::OnOutputVolumeChanged() {
  95   CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
  96   extensions::DispatchVolumeChangedEvent(
  97       audio_handler->GetOutputVolumePercent(),
  98       audio_handler->IsOutputMuted());
  99 }
 100
 101 void VolumeController::OnOutputMuteChanged() {
 102   CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
 103   extensions::DispatchVolumeChangedEvent(
 104       audio_handler->GetOutputVolumePercent(),
 105       audio_handler->IsOutputMuted());
 106 }