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 19using chromeos::CrasAudioHandler; 20 21namespace { 22 23// Percent by which the volume should be changed when a volume key is pressed. 24const double kStepPercentage = 4.0; 25 26bool VolumeAdjustSoundEnabled() { 27 return !CommandLine::ForCurrentProcess()->HasSwitch( 28 chromeos::switches::kDisableVolumeAdjustSound); 29} 30 31void PlayVolumeAdjustSound() { 32 if (VolumeAdjustSoundEnabled()) 33 ash::PlaySystemSoundIfSpokenFeedback(chromeos::SOUND_VOLUME_ADJUST); 34} 35 36} // namespace 37 38VolumeController::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 48VolumeController::~VolumeController() { 49 if (CrasAudioHandler::IsInitialized()) 50 CrasAudioHandler::Get()->RemoveAudioObserver(this); 51} 52 53bool 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 61bool 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 78bool 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 98void VolumeController::OnOutputVolumeChanged() { 99 CrasAudioHandler* audio_handler = CrasAudioHandler::Get(); 100 extensions::DispatchVolumeChangedEvent( 101 audio_handler->GetOutputVolumePercent(), 102 audio_handler->IsOutputMuted()); 103} 104 105void VolumeController::OnOutputMuteChanged() { 106 CrasAudioHandler* audio_handler = CrasAudioHandler::Get(); 107 extensions::DispatchVolumeChangedEvent( 108 audio_handler->GetOutputVolumePercent(), 109 audio_handler->IsOutputMuted()); 110} 111