blob: c2132dbe63f2e58bf143bb2d4889d5fe54ffd0ab (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
// 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.
#ifndef CHROMEOS_AUDIO_AUDIO_DEVICES_PREF_HANDLER_IMPL_H_
#define CHROMEOS_AUDIO_AUDIO_DEVICES_PREF_HANDLER_IMPL_H_
#include <string>
#include "base/macros.h"
#include "base/observer_list.h"
#include "base/prefs/pref_change_registrar.h"
#include "base/values.h"
#include "chromeos/audio/audio_devices_pref_handler.h"
#include "chromeos/chromeos_export.h"
class PrefRegistrySimple;
class PrefService;
namespace chromeos {
// Class which implements AudioDevicesPrefHandler interface and register audio
// preferences as well.
class CHROMEOS_EXPORT AudioDevicesPrefHandlerImpl
: public AudioDevicesPrefHandler {
public:
// |local_state| is the device-wide preference service.
explicit AudioDevicesPrefHandlerImpl(PrefService* local_state);
// Overridden from AudioDevicesPrefHandler.
double GetOutputVolumeValue(const AudioDevice* device) override;
double GetInputGainValue(const AudioDevice* device) override;
void SetVolumeGainValue(const AudioDevice& device, double value) override;
bool GetMuteValue(const AudioDevice& device) override;
void SetMuteValue(const AudioDevice& device, bool mute_on) override;
AudioDeviceState GetDeviceState(const AudioDevice& device) override;
void SetDeviceState(const AudioDevice& device,
AudioDeviceState state) override;
bool GetAudioOutputAllowedValue() override;
void AddAudioPrefObserver(AudioPrefObserver* observer) override;
void RemoveAudioPrefObserver(AudioPrefObserver* observer) override;
// Registers volume and mute preferences.
static void RegisterPrefs(PrefRegistrySimple* registry);
protected:
~AudioDevicesPrefHandlerImpl() override;
private:
// Initializes the observers for the policy prefs.
void InitializePrefObservers();
// Load and save methods for the mute preferences for all devices.
void LoadDevicesMutePref();
void SaveDevicesMutePref();
// Load and save methods for the volume preferences for all devices.
void LoadDevicesVolumePref();
void SaveDevicesVolumePref();
// Load and save methods for the active state for all devices.
void LoadDevicesStatePref();
void SaveDevicesStatePref();
double GetVolumeGainPrefValue(const AudioDevice& device);
double GetDeviceDefaultOutputVolume(const AudioDevice& device);
// Methods to migrate the mute and volume settings for a device from the
// previous global pref value to the new per device pref value for the
// current active device. If a previous global setting doesn't exist, we'll
// use default values of mute = off and volume = 75%.
void MigrateDeviceMuteSettings(const std::string& active_device);
void MigrateDeviceVolumeSettings(const std::string& active_device);
// Notifies the AudioPrefObserver for audio policy pref changes.
void NotifyAudioPolicyChange();
scoped_ptr<base::DictionaryValue> device_mute_settings_;
scoped_ptr<base::DictionaryValue> device_volume_settings_;
scoped_ptr<base::DictionaryValue> device_state_settings_;
PrefService* local_state_; // not owned
PrefChangeRegistrar pref_change_registrar_;
base::ObserverList<AudioPrefObserver> observers_;
DISALLOW_COPY_AND_ASSIGN(AudioDevicesPrefHandlerImpl);
};
} // namespace chromeos
#endif // CHROMEOS_AUDIO_AUDIO_DEVICES_PREF_HANDLER_IMPL_H_
|
