blob: 17b5681ebce457ca4feffe8a9f1479fa95ee4832 [file] [log] [blame]
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/audio/audio_devices_pref_handler_impl.h"
#include <algorithm>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/logging.h"
#include "base/prefs/pref_registry_simple.h"
#include "base/prefs/pref_service.h"
#include "base/prefs/scoped_user_pref_update.h"
#include "base/strings/string_number_conversions.h"
#include "chromeos/audio/audio_device.h"
#include "chromeos/chromeos_pref_names.h"
namespace {
// Values used for muted preference.
const int kPrefMuteOff = 0;
const int kPrefMuteOn = 1;
// Gets the device id string for storing audio preference. The format of
// device string is a string consisting of 3 parts.
// |device_name| : |integer from lower 32 bit of device id| :
// |0(output device) or 1(input device)|
// If an audio device has both integrated input and output devices, the first 2
// parts of the string could be identical, only the last part will differentiate
// them.
std::string GetDeviceIdString(const chromeos::AudioDevice& device) {
std::string device_id_string =
device.device_name + " : " +
base::Uint64ToString(device.id & static_cast<uint64>(0xffffffff)) +
" : " + (device.is_input ? "1" : "0");
// Replace any periods from the device id string with a space, since setting
// names cannot contain periods.
std::replace(device_id_string.begin(), device_id_string.end(), '.', ' ');
return device_id_string;
}
} // namespace
namespace chromeos {
double AudioDevicesPrefHandlerImpl::GetOutputVolumeValue(
const AudioDevice* device) {
if (!device)
return kDefaultOutputVolumePercent;
else
return GetVolumeGainPrefValue(*device);
}
double AudioDevicesPrefHandlerImpl::GetInputGainValue(
const AudioDevice* device) {
DCHECK(device);
return GetVolumeGainPrefValue(*device);
}
void AudioDevicesPrefHandlerImpl::SetVolumeGainValue(
const AudioDevice& device, double value) {
device_volume_settings_->SetDouble(GetDeviceIdString(device), value);
SaveDevicesVolumePref();
}
bool AudioDevicesPrefHandlerImpl::GetMuteValue(const AudioDevice& device) {
UpdateDevicesMutePref();
std::string device_id_str = GetDeviceIdString(device);
if (!device_mute_settings_->HasKey(device_id_str))
MigrateDeviceMuteSettings(device_id_str);
int mute = kPrefMuteOff;
device_mute_settings_->GetInteger(device_id_str, &mute);
return (mute == kPrefMuteOn);
}
void AudioDevicesPrefHandlerImpl::SetMuteValue(const AudioDevice& device,
bool mute) {
device_mute_settings_->SetInteger(GetDeviceIdString(device),
mute ? kPrefMuteOn : kPrefMuteOff);
SaveDevicesMutePref();
}
bool AudioDevicesPrefHandlerImpl::GetAudioOutputAllowedValue() {
return local_state_->GetBoolean(prefs::kAudioOutputAllowed);
}
void AudioDevicesPrefHandlerImpl::AddAudioPrefObserver(
AudioPrefObserver* observer) {
observers_.AddObserver(observer);
}
void AudioDevicesPrefHandlerImpl::RemoveAudioPrefObserver(
AudioPrefObserver* observer) {
observers_.RemoveObserver(observer);
}
double AudioDevicesPrefHandlerImpl::GetVolumeGainPrefValue(
const AudioDevice& device) {
UpdateDevicesVolumePref();
std::string device_id_str = GetDeviceIdString(device);
if (!device_volume_settings_->HasKey(device_id_str))
MigrateDeviceVolumeSettings(device_id_str);
// TODO(jennyz, rkc): Return a meaningful input gain default value, when
// cras has added support for normalizing input gain range.
double value = device.is_input ?
0.0 : GetDeviceDefaultOutputVolume(device);
// TODO(rkc): The above code is completely ignored since we 'always' have a
// default pref value. Fix this. http://crbug.com/442489
device_volume_settings_->GetDouble(device_id_str, &value);
return value;
}
double AudioDevicesPrefHandlerImpl::GetDeviceDefaultOutputVolume(
const AudioDevice& device) {
if (device.type == AUDIO_TYPE_HDMI)
return kDefaultHdmiOutputVolumePercent;
else
return kDefaultOutputVolumePercent;
}
AudioDevicesPrefHandlerImpl::AudioDevicesPrefHandlerImpl(
PrefService* local_state)
: device_mute_settings_(new base::DictionaryValue()),
device_volume_settings_(new base::DictionaryValue()),
local_state_(local_state) {
InitializePrefObservers();
UpdateDevicesMutePref();
UpdateDevicesVolumePref();
}
AudioDevicesPrefHandlerImpl::~AudioDevicesPrefHandlerImpl() {
}
void AudioDevicesPrefHandlerImpl::InitializePrefObservers() {
pref_change_registrar_.Init(local_state_);
base::Closure callback =
base::Bind(&AudioDevicesPrefHandlerImpl::NotifyAudioPolicyChange,
base::Unretained(this));
pref_change_registrar_.Add(prefs::kAudioOutputAllowed, callback);
}
void AudioDevicesPrefHandlerImpl::UpdateDevicesMutePref() {
const base::DictionaryValue* mute_prefs =
local_state_->GetDictionary(prefs::kAudioDevicesMute);
if (mute_prefs)
device_mute_settings_.reset(mute_prefs->DeepCopy());
}
void AudioDevicesPrefHandlerImpl::SaveDevicesMutePref() {
DictionaryPrefUpdate dict_update(local_state_, prefs::kAudioDevicesMute);
base::DictionaryValue::Iterator it(*device_mute_settings_);
while (!it.IsAtEnd()) {
int mute = kPrefMuteOff;
it.value().GetAsInteger(&mute);
dict_update->SetInteger(it.key(), mute);
it.Advance();
}
}
void AudioDevicesPrefHandlerImpl::UpdateDevicesVolumePref() {
const base::DictionaryValue* volume_prefs =
local_state_->GetDictionary(prefs::kAudioDevicesVolumePercent);
if (volume_prefs)
device_volume_settings_.reset(volume_prefs->DeepCopy());
}
void AudioDevicesPrefHandlerImpl::SaveDevicesVolumePref() {
DictionaryPrefUpdate dict_update(local_state_,
prefs::kAudioDevicesVolumePercent);
base::DictionaryValue::Iterator it(*device_volume_settings_);
while (!it.IsAtEnd()) {
double volume = kDefaultOutputVolumePercent;
bool success = it.value().GetAsDouble(&volume);
DCHECK(success);
dict_update->SetDouble(it.key(), volume);
it.Advance();
}
}
void AudioDevicesPrefHandlerImpl::MigrateDeviceMuteSettings(
const std::string& active_device) {
int old_mute = local_state_->GetInteger(prefs::kAudioMute);
device_mute_settings_->SetInteger(active_device, old_mute);
SaveDevicesMutePref();
}
void AudioDevicesPrefHandlerImpl::MigrateDeviceVolumeSettings(
const std::string& active_device) {
double old_volume = local_state_->GetDouble(prefs::kAudioVolumePercent);
device_volume_settings_->SetDouble(active_device, old_volume);
SaveDevicesVolumePref();
}
void AudioDevicesPrefHandlerImpl::NotifyAudioPolicyChange() {
FOR_EACH_OBSERVER(AudioPrefObserver,
observers_,
OnAudioPolicyPrefChanged());
}
// static
void AudioDevicesPrefHandlerImpl::RegisterPrefs(PrefRegistrySimple* registry) {
registry->RegisterDictionaryPref(prefs::kAudioDevicesVolumePercent);
registry->RegisterDictionaryPref(prefs::kAudioDevicesMute);
// Register the prefs backing the audio muting policies.
// Policy for audio input is handled by kAudioCaptureAllowed in the Chrome
// media system.
registry->RegisterBooleanPref(prefs::kAudioOutputAllowed, true);
// Register the legacy audio prefs for migration.
registry->RegisterDoublePref(prefs::kAudioVolumePercent,
kDefaultOutputVolumePercent);
registry->RegisterIntegerPref(prefs::kAudioMute, kPrefMuteOff);
}
} // namespace chromeos