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.
5 #include "chrome/browser/ui/ash/volume_controller_chromeos.h"
7 #include "ash/ash_switches.h"
8 #include "chrome/browser/browser_process.h"
9 #include "chrome/browser/extensions/api/system_private/system_private_api.h"
10 #include "content/public/browser/user_metrics.h"
12 using chromeos::CrasAudioHandler;
16 // Percent by which the volume should be changed when a volume key is pressed.
17 const double kStepPercentage = 4.0;
21 VolumeController::VolumeController() {
22 CrasAudioHandler::Get()->AddAudioObserver(this);
25 VolumeController::~VolumeController() {
26 if (CrasAudioHandler::IsInitialized())
27 CrasAudioHandler::Get()->RemoveAudioObserver(this);
30 bool VolumeController::HandleVolumeMute(const ui::Accelerator& accelerator) {
31 if (accelerator.key_code() == ui::VKEY_VOLUME_MUTE)
32 content::RecordAction(content::UserMetricsAction("Accel_VolumeMute_F8"));
34 CrasAudioHandler::Get()->SetOutputMute(true);
38 bool VolumeController::HandleVolumeDown(const ui::Accelerator& accelerator) {
39 if (accelerator.key_code() == ui::VKEY_VOLUME_DOWN)
40 content::RecordAction(content::UserMetricsAction("Accel_VolumeDown_F9"));
42 CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
43 if (audio_handler->IsOutputMuted()) {
44 audio_handler->SetOutputVolumePercent(0);
46 audio_handler->AdjustOutputVolumeByPercent(-kStepPercentage);
47 if (audio_handler->IsOutputVolumeBelowDefaultMuteLvel())
48 audio_handler->SetOutputMute(true);
53 bool VolumeController::HandleVolumeUp(const ui::Accelerator& accelerator) {
54 if (accelerator.key_code() == ui::VKEY_VOLUME_UP)
55 content::RecordAction(content::UserMetricsAction("Accel_VolumeUp_F10"));
57 CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
58 if (audio_handler->IsOutputMuted()) {
59 audio_handler->SetOutputMute(false);
60 audio_handler->AdjustOutputVolumeToAudibleLevel();
62 audio_handler->AdjustOutputVolumeByPercent(kStepPercentage);
68 void VolumeController::OnOutputVolumeChanged() {
69 CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
70 extensions::DispatchVolumeChangedEvent(
71 audio_handler->GetOutputVolumePercent(),
72 audio_handler->IsOutputMuted());
75 void VolumeController::OnOutputMuteChanged() {
76 CrasAudioHandler* audio_handler = CrasAudioHandler::Get();
77 extensions::DispatchVolumeChangedEvent(
78 audio_handler->GetOutputVolumePercent(),
79 audio_handler->IsOutputMuted());