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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MEDIA_PREFS_H
#define MEDIA_PREFS_H
#include "mozilla/Atomics.h"
// First time MediaPrefs::GetSingleton() needs to be called on the main thread,
// before any of the methods accessing the values are used, but after
// the Preferences system has been initialized.
// The static methods to access the preference value are safe to call
// from any thread after that first call.
// To register a preference, you need to add a line in this file using
// the DECL_MEDIA_PREF macro.
//
// For example this line in the .h:
// DECL_MEDIA_PREF("media.resampling.enabled",AudioSinkResampling,bool,false);
// means that you can call
// const bool& var = MediaPrefs::AudioSinkResampling();
// from any thread, you will get the most up to date preference value of
// "media.resampling.enabled". If the value is not set, the default would be
// false.
#define DECL_MEDIA_PREF(Pref, Name, Type, Default) \
public: \
static const Type& Name() { MOZ_ASSERT(SingletonExists()); return GetSingleton().mPref##Name.mValue; } \
private: \
static const char* Get##Name##PrefName() { return Pref; } \
static StripAtomic<Type> Get##Name##PrefDefault() { return Default; } \
PrefTemplate<Type, Get##Name##PrefDefault, Get##Name##PrefName> mPref##Name
// Custom Definitions.
#define GMP_DEFAULT_ASYNC_SHUTDOWN_TIMEOUT 3000
#define SUSPEND_BACKGROUND_VIDEO_DELAY_MS 10000
#define TEST_PREFERENCE_FAKE_RECOGNITION_SERVICE "media.webspeech.test.fake_recognition_service"
namespace mozilla {
template<class T> class StaticAutoPtr;
class MediaPrefs final
{
typedef Atomic<uint32_t, Relaxed> AtomicUint32;
template <typename T>
struct StripAtomicImpl {
typedef T Type;
};
template <typename T, MemoryOrdering Order>
struct StripAtomicImpl<Atomic<T, Order>> {
typedef T Type;
};
template <typename T>
using StripAtomic = typename StripAtomicImpl<T>::Type;
private:
// Since we cannot use const char*, use a function that returns it.
template <class T, StripAtomic<T> Default(), const char* Pref()>
class PrefTemplate
{
public:
PrefTemplate()
: mValue(Default())
{
Register(Pref());
}
T mValue;
private:
void Register(const char* aPreference)
{
AssertMainThread();
PrefAddVarCache(&mValue, aPreference, mValue);
}
};
// This is where DECL_MEDIA_PREF for each of the preferences should go.
// AudioSink
DECL_MEDIA_PREF("accessibility.monoaudio.enable", MonoAudio, bool, false);
DECL_MEDIA_PREF("media.resampling.enabled", AudioSinkResampling, bool, false);
DECL_MEDIA_PREF("media.resampling.rate", AudioSinkResampleRate, uint32_t, 48000);
#ifdef XP_WIN
// Enable multichannel support on Windows.
DECL_MEDIA_PREF("media.forcestereo.enabled", AudioSinkForceStereo, bool, false);
#else
DECL_MEDIA_PREF("media.forcestereo.enabled", AudioSinkForceStereo, bool, true);
#endif
// VideoSink
DECL_MEDIA_PREF("media.ruin-av-sync.enabled", RuinAvSync, bool, false);
// Encrypted Media Extensions
DECL_MEDIA_PREF("media.clearkey.persistent-license.enabled", ClearKeyPersistentLicenseEnabled, bool, false);
// PlatformDecoderModule
DECL_MEDIA_PREF("media.apple.forcevda", AppleForceVDA, bool, false);
DECL_MEDIA_PREF("media.gmp.insecure.allow", GMPAllowInsecure, bool, false);
DECL_MEDIA_PREF("media.gmp.async-shutdown-timeout", GMPAsyncShutdownTimeout, uint32_t, GMP_DEFAULT_ASYNC_SHUTDOWN_TIMEOUT);
DECL_MEDIA_PREF("media.eme.enabled", EMEEnabled, bool, false);
DECL_MEDIA_PREF("media.use-blank-decoder", PDMUseBlankDecoder, bool, false);
DECL_MEDIA_PREF("media.gpu-process-decoder", PDMUseGPUDecoder, bool, false);
#ifdef MOZ_FFMPEG
DECL_MEDIA_PREF("media.ffmpeg.enabled", PDMFFmpegEnabled, bool, true);
DECL_MEDIA_PREF("media.libavcodec.allow-obsolete", LibavcodecAllowObsolete, bool, false);
#endif
#ifdef MOZ_FFVPX
DECL_MEDIA_PREF("media.ffvpx.enabled", PDMFFVPXEnabled, bool, true);
#endif
#ifdef MOZ_AV1
DECL_MEDIA_PREF("media.av1.enabled", AV1Enabled, bool, false);
#endif
#ifdef XP_WIN
DECL_MEDIA_PREF("media.wmf.enabled", PDMWMFEnabled, bool, true);
DECL_MEDIA_PREF("media.wmf.skip-blacklist", PDMWMFSkipBlacklist, bool, false);
DECL_MEDIA_PREF("media.decoder-doctor.wmf-disabled-is-failure", DecoderDoctorWMFDisabledIsFailure, bool, false);
DECL_MEDIA_PREF("media.wmf.vp9.enabled", PDMWMFVP9DecoderEnabled, bool, true);
DECL_MEDIA_PREF("media.wmf.decoder.thread-count", PDMWMFThreadCount, int32_t, -1);
#endif
DECL_MEDIA_PREF("media.decoder.fuzzing.enabled", PDMFuzzingEnabled, bool, false);
DECL_MEDIA_PREF("media.decoder.fuzzing.video-output-minimum-interval-ms", PDMFuzzingInterval, uint32_t, 0);
DECL_MEDIA_PREF("media.decoder.fuzzing.dont-delay-inputexhausted", PDMFuzzingDelayInputExhausted, bool, true);
DECL_MEDIA_PREF("media.gmp.decoder.enabled", PDMGMPEnabled, bool, true);
DECL_MEDIA_PREF("media.gmp.decoder.aac", GMPAACPreferred, uint32_t, 0);
DECL_MEDIA_PREF("media.gmp.decoder.h264", GMPH264Preferred, uint32_t, 0);
// MediaDecoderStateMachine
DECL_MEDIA_PREF("media.suspend-bkgnd-video.enabled", MDSMSuspendBackgroundVideoEnabled, bool, false);
DECL_MEDIA_PREF("media.suspend-bkgnd-video.delay-ms", MDSMSuspendBackgroundVideoDelay, AtomicUint32, SUSPEND_BACKGROUND_VIDEO_DELAY_MS);
DECL_MEDIA_PREF("media.dormant-on-pause-timeout-ms", DormantOnPauseTimeout, int32_t, 5000);
// WebSpeech
DECL_MEDIA_PREF("media.webspeech.synth.force_global_queue", WebSpeechForceGlobal, bool, false);
DECL_MEDIA_PREF("media.webspeech.test.enable", WebSpeechTestEnabled, bool, false);
DECL_MEDIA_PREF("media.webspeech.test.fake_fsm_events", WebSpeechFakeFSMEvents, bool, false);
DECL_MEDIA_PREF(TEST_PREFERENCE_FAKE_RECOGNITION_SERVICE, WebSpeechFakeRecognitionService, bool, false);
DECL_MEDIA_PREF("media.webspeech.recognition.enable", WebSpeechRecognitionEnabled, bool, false);
DECL_MEDIA_PREF("media.webspeech.recognition.force_enable", WebSpeechRecognitionForceEnabled, bool, false);
DECL_MEDIA_PREF("media.num-decode-threads", MediaThreadPoolDefaultCount, uint32_t, 4);
DECL_MEDIA_PREF("media.decoder.limit", MediaDecoderLimit, int32_t, MediaDecoderLimitDefault());
// Ogg
DECL_MEDIA_PREF("media.ogg.enabled", OggEnabled, bool, true);
// Flac
DECL_MEDIA_PREF("media.ogg.flac.enabled", FlacInOgg, bool, false);
DECL_MEDIA_PREF("media.flac.enabled", FlacEnabled, bool, true);
public:
// Manage the singleton:
static MediaPrefs& GetSingleton();
static bool SingletonExists();
private:
template<class T> friend class StaticAutoPtr;
static StaticAutoPtr<MediaPrefs> sInstance;
// Default value functions
static int32_t MediaDecoderLimitDefault()
{
// Setting a decoder limit was only necessary for Android; set no decoder limit.
return -1;
}
// Creating these to avoid having to include Preferences.h in the .h
static void PrefAddVarCache(bool*, const char*, bool);
static void PrefAddVarCache(int32_t*, const char*, int32_t);
static void PrefAddVarCache(uint32_t*, const char*, uint32_t);
static void PrefAddVarCache(float*, const char*, float);
static void PrefAddVarCache(AtomicUint32*, const char*, uint32_t);
static void AssertMainThread();
MediaPrefs();
MediaPrefs(const MediaPrefs&) = delete;
MediaPrefs& operator=(const MediaPrefs&) = delete;
};
#undef DECL_MEDIA_PREF /* Don't need it outside of this file */
} // namespace mozilla
#endif /* MEDIA_PREFS_H */
|
