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