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gecko-dev
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gecko-dev/dom/media/MediaPrefs.h

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C++
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/* -*- 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
#ifdef MOZ_WIDGET_ANDROID
#include "GeneratedJNIWrappers.h"
#endif
#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.
// Cache sizes.
DECL_MEDIA_PREF("media.cache.resource-index", MediaResourceIndexCache, uint32_t, 8192);
// 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);
#if defined(XP_WIN) || defined(XP_DARWIN) || defined(MOZ_PULSEAUDIO)
// libcubeb backend implement .get_preferred_channel_layout
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.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_GONK_MEDIACODEC
DECL_MEDIA_PREF("media.gonk.enabled", PDMGonkDecoderEnabled, bool, true);
#endif
#ifdef MOZ_WIDGET_ANDROID
DECL_MEDIA_PREF("media.android-media-codec.enabled", PDMAndroidMediaCodecEnabled, bool, false);
DECL_MEDIA_PREF("media.android-media-codec.preferred", PDMAndroidMediaCodecPreferred, bool, false);
DECL_MEDIA_PREF("media.navigator.hardware.vp8_encode.acceleration_remote_enabled", RemoteMediaCodecVP8EncoderEnabled, bool, false);
#endif
#ifdef MOZ_FFMPEG
DECL_MEDIA_PREF("media.ffmpeg.enabled", PDMFFmpegEnabled, bool, true);
DECL_MEDIA_PREF("media.libavcodec.allow-obsolete", LibavcodecAllowObsolete, bool, false);
#endif
#if defined(MOZ_FFMPEG) || defined(MOZ_FFVPX)
DECL_MEDIA_PREF("media.ffmpeg.low-latency.enabled", PDMFFmpegLowLatencyEnabled, bool, false);
#endif
#ifdef MOZ_FFVPX
DECL_MEDIA_PREF("media.ffvpx.enabled", PDMFFVPXEnabled, bool, true);
#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);
DECL_MEDIA_PREF("media.wmf.allow-unsupported-resolutions", PDMWMFAllowUnsupportedResolutions, bool, false);
#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.decoder.recycle.enabled", MediaDecoderCheckRecycling, bool, false);
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);
DECL_MEDIA_PREF("media.eme.audio.blank", EMEBlankAudio, bool, false);
DECL_MEDIA_PREF("media.eme.video.blank", EMEBlankVideo, bool, false);
DECL_MEDIA_PREF("media.eme.chromium-api.enabled", EMEChromiumAPIEnabled, bool, false);
DECL_MEDIA_PREF("media.eme.chromium-api.video-shmems",
EMEChromiumAPIVideoShmemCount,
uint32_t,
3);
// 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());
#if defined(RELEASE_OR_BETA)
DECL_MEDIA_PREF("media.audio-max-decode-error", MaxAudioDecodeError, uint32_t, 3);
DECL_MEDIA_PREF("media.video-max-decode-error", MaxVideoDecodeError, uint32_t, 2);
#else
// Take zero tolerance of decoding error in debug for any decoder regression.
DECL_MEDIA_PREF("media.audio-max-decode-error", MaxAudioDecodeError, uint32_t, 0);
DECL_MEDIA_PREF("media.video-max-decode-error", MaxVideoDecodeError, uint32_t, 0);
#endif
// 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);
#if !defined(RELEASE_OR_BETA)
DECL_MEDIA_PREF("media.rust.test_mode", RustTestMode, bool, false);
#endif
#if defined(MOZ_WIDGET_GTK)
DECL_MEDIA_PREF("media.rust.mp4parser", EnableRustMP4Parser, bool, true);
#else
DECL_MEDIA_PREF("media.rust.mp4parser", EnableRustMP4Parser, bool, false);
#endif
DECL_MEDIA_PREF("media.mp4.enabled", MP4Enabled, bool, false);
// Error/warning handling, Decoder Doctor
DECL_MEDIA_PREF("media.playback.warnings-as-errors", MediaWarningsAsErrors, bool, false);
DECL_MEDIA_PREF("media.playback.warnings-as-errors.stagefright-vs-rust",
MediaWarningsAsErrorsStageFrightVsRust, bool, false);
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()
{
#ifdef MOZ_WIDGET_ANDROID
if (jni::GetAPIVersion() < 18) {
// Older Android versions have broken support for multiple simultaneous
// decoders, see bug 1278574.
return 1;
}
#endif
// Otherwise, 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 */
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