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/*
* Copyright (C) 2007-2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef MediaPlayer_h
#define MediaPlayer_h
#if ENABLE(VIDEO)
#include "GraphicsTypes3D.h"
#include "AudioTrackPrivate.h"
#include "LegacyCDMSession.h"
#include "InbandTextTrackPrivate.h"
#include "IntRect.h"
#include "URL.h"
#include "LayoutRect.h"
#include "MediaPlayerEnums.h"
#include "NativeImage.h"
#include "PlatformLayer.h"
#include "PlatformMediaResourceLoader.h"
#include "PlatformMediaSession.h"
#include "SecurityOriginHash.h"
#include "Timer.h"
#include "VideoTrackPrivate.h"
#include <runtime/Uint8Array.h>
#include <wtf/Forward.h>
#include <wtf/HashSet.h>
#include <wtf/MediaTime.h>
#include <wtf/Noncopyable.h>
#include <wtf/Ref.h>
#include <wtf/RefCounted.h>
#include <wtf/text/StringHash.h>
#if ENABLE(AVF_CAPTIONS)
#include "PlatformTextTrack.h"
#endif
OBJC_CLASS AVAsset;
OBJC_CLASS AVPlayer;
OBJC_CLASS NSArray;
OBJC_CLASS QTMovie;
class AVCFPlayer;
class QTMovieGWorld;
class QTMovieVisualContext;
namespace WebCore {
class AudioSourceProvider;
class AuthenticationChallenge;
class MediaPlaybackTarget;
#if ENABLE(MEDIA_SOURCE)
class MediaSourcePrivateClient;
#endif
#if ENABLE(MEDIA_STREAM)
class MediaStreamPrivate;
#endif
class MediaPlayerPrivateInterface;
class TextTrackRepresentation;
struct Cookie;
// Structure that will hold every native
// types supported by the current media player.
// We have to do that has multiple media players
// backend can live at runtime.
struct PlatformMedia {
enum {
None,
QTMovieType,
QTMovieGWorldType,
QTMovieVisualContextType,
AVFoundationMediaPlayerType,
AVFoundationCFMediaPlayerType,
AVFoundationAssetType,
} type;
union {
QTMovie* qtMovie;
QTMovieGWorld* qtMovieGWorld;
QTMovieVisualContext* qtMovieVisualContext;
AVPlayer* avfMediaPlayer;
AVCFPlayer* avcfMediaPlayer;
AVAsset* avfAsset;
} media;
};
struct MediaEngineSupportParameters {
MediaEngineSupportParameters() { }
String type;
String codecs;
URL url;
bool isMediaSource { false };
bool isMediaStream { false };
};
extern const PlatformMedia NoPlatformMedia;
class CDMSessionClient;
class CachedResourceLoader;
class ContentType;
class GraphicsContext;
class GraphicsContext3D;
class IntRect;
class IntSize;
class MediaPlayer;
class PlatformTimeRanges;
struct MediaPlayerFactory;
#if PLATFORM(WIN) && USE(AVFOUNDATION)
struct GraphicsDeviceAdapter;
#endif
#if USE(GSTREAMER)
class MediaPlayerRequestInstallMissingPluginsCallback;
#endif
class MediaPlayerClient {
public:
virtual ~MediaPlayerClient() { }
// the network state has changed
virtual void mediaPlayerNetworkStateChanged(MediaPlayer*) { }
// the ready state has changed
virtual void mediaPlayerReadyStateChanged(MediaPlayer*) { }
// the volume state has changed
virtual void mediaPlayerVolumeChanged(MediaPlayer*) { }
// the mute state has changed
virtual void mediaPlayerMuteChanged(MediaPlayer*) { }
// time has jumped, eg. not as a result of normal playback
virtual void mediaPlayerTimeChanged(MediaPlayer*) { }
// the media file duration has changed, or is now known
virtual void mediaPlayerDurationChanged(MediaPlayer*) { }
// the playback rate has changed
virtual void mediaPlayerRateChanged(MediaPlayer*) { }
// the play/pause status changed
virtual void mediaPlayerPlaybackStateChanged(MediaPlayer*) { }
// The MediaPlayer has found potentially problematic media content.
// This is used internally to trigger swapping from a <video>
// element to an <embed> in standalone documents
virtual void mediaPlayerSawUnsupportedTracks(MediaPlayer*) { }
// The MediaPlayer could not discover an engine which supports the requested resource.
virtual void mediaPlayerResourceNotSupported(MediaPlayer*) { }
// Presentation-related methods
// a new frame of video is available
virtual void mediaPlayerRepaint(MediaPlayer*) { }
// the movie size has changed
virtual void mediaPlayerSizeChanged(MediaPlayer*) { }
virtual void mediaPlayerEngineUpdated(MediaPlayer*) { }
// The first frame of video is available to render. A media engine need only make this callback if the
// first frame is not available immediately when prepareForRendering is called.
virtual void mediaPlayerFirstVideoFrameAvailable(MediaPlayer*) { }
// A characteristic of the media file, eg. video, audio, closed captions, etc, has changed.
virtual void mediaPlayerCharacteristicChanged(MediaPlayer*) { }
// whether the rendering system can accelerate the display of this MediaPlayer.
virtual bool mediaPlayerRenderingCanBeAccelerated(MediaPlayer*) { return false; }
// called when the media player's rendering mode changed, which indicates a change in the
// availability of the platformLayer().
virtual void mediaPlayerRenderingModeChanged(MediaPlayer*) { }
// whether accelerated compositing is enabled for video rendering
virtual bool mediaPlayerAcceleratedCompositingEnabled() { return false; }
virtual void mediaPlayerActiveSourceBuffersChanged(const MediaPlayer*) { }
#if PLATFORM(WIN) && USE(AVFOUNDATION)
virtual GraphicsDeviceAdapter* mediaPlayerGraphicsDeviceAdapter(const MediaPlayer*) const { return 0; }
#endif
#if ENABLE(LEGACY_ENCRYPTED_MEDIA)
virtual RefPtr<ArrayBuffer> mediaPlayerCachedKeyForKeyId(const String&) const { return nullptr; }
virtual bool mediaPlayerKeyNeeded(MediaPlayer*, Uint8Array*) { return false; }
virtual String mediaPlayerMediaKeysStorageDirectory() const { return emptyString(); }
#endif
#if ENABLE(WIRELESS_PLAYBACK_TARGET)
virtual void mediaPlayerCurrentPlaybackTargetIsWirelessChanged(MediaPlayer*) { };
#endif
virtual String mediaPlayerReferrer() const { return String(); }
virtual String mediaPlayerUserAgent() const { return String(); }
virtual void mediaPlayerEnterFullscreen() { }
virtual void mediaPlayerExitFullscreen() { }
virtual bool mediaPlayerIsFullscreen() const { return false; }
virtual bool mediaPlayerIsFullscreenPermitted() const { return false; }
virtual bool mediaPlayerIsVideo() const { return false; }
virtual LayoutRect mediaPlayerContentBoxRect() const { return LayoutRect(); }
virtual float mediaPlayerContentsScale() const { return 1; }
virtual void mediaPlayerSetSize(const IntSize&) { }
virtual void mediaPlayerPause() { }
virtual void mediaPlayerPlay() { }
virtual bool mediaPlayerPlatformVolumeConfigurationRequired() const { return false; }
virtual bool mediaPlayerIsPaused() const { return true; }
virtual bool mediaPlayerIsLooping() const { return false; }
virtual CachedResourceLoader* mediaPlayerCachedResourceLoader() { return 0; }
virtual RefPtr<PlatformMediaResourceLoader> mediaPlayerCreateResourceLoader() { return nullptr; }
virtual bool doesHaveAttribute(const AtomicString&, AtomicString* = 0) const { return false; }
virtual bool mediaPlayerShouldUsePersistentCache() const { return true; }
virtual const String& mediaPlayerMediaCacheDirectory() const { return emptyString(); }
#if ENABLE(VIDEO_TRACK)
virtual void mediaPlayerDidAddAudioTrack(AudioTrackPrivate&) { }
virtual void mediaPlayerDidAddTextTrack(InbandTextTrackPrivate&) { }
virtual void mediaPlayerDidAddVideoTrack(VideoTrackPrivate&) { }
virtual void mediaPlayerDidRemoveAudioTrack(AudioTrackPrivate&) { }
virtual void mediaPlayerDidRemoveTextTrack(InbandTextTrackPrivate&) { }
virtual void mediaPlayerDidRemoveVideoTrack(VideoTrackPrivate&) { }
virtual void textTrackRepresentationBoundsChanged(const IntRect&) { }
#if ENABLE(AVF_CAPTIONS)
virtual Vector<RefPtr<PlatformTextTrack>> outOfBandTrackSources() { return Vector<RefPtr<PlatformTextTrack>>(); }
#endif
#endif
#if PLATFORM(IOS)
virtual String mediaPlayerNetworkInterfaceName() const { return String(); }
virtual bool mediaPlayerGetRawCookies(const URL&, Vector<Cookie>&) const { return false; }
#endif
virtual bool mediaPlayerShouldWaitForResponseToAuthenticationChallenge(const AuthenticationChallenge&) { return false; }
virtual void mediaPlayerHandlePlaybackCommand(PlatformMediaSession::RemoteControlCommandType) { }
virtual String mediaPlayerSourceApplicationIdentifier() const { return emptyString(); }
virtual bool mediaPlayerIsInMediaDocument() const { return false; }
virtual void mediaPlayerEngineFailedToLoad() const { }
virtual double mediaPlayerRequestedPlaybackRate() const { return 0; }
virtual MediaPlayerEnums::VideoFullscreenMode mediaPlayerFullscreenMode() const { return MediaPlayerEnums::VideoFullscreenModeNone; }
virtual Vector<String> mediaPlayerPreferredAudioCharacteristics() const { return Vector<String>(); }
#if USE(GSTREAMER)
virtual void requestInstallMissingPlugins(const String&, const String&, MediaPlayerRequestInstallMissingPluginsCallback&) { };
#endif
virtual bool mediaPlayerShouldDisableSleep() const { return false; }
};
class MediaPlayerSupportsTypeClient {
public:
virtual ~MediaPlayerSupportsTypeClient() { }
virtual bool mediaPlayerNeedsSiteSpecificHacks() const { return false; }
virtual String mediaPlayerDocumentHost() const { return String(); }
};
class MediaPlayer : public MediaPlayerEnums, public RefCounted<MediaPlayer> {
WTF_MAKE_NONCOPYABLE(MediaPlayer); WTF_MAKE_FAST_ALLOCATED;
public:
static Ref<MediaPlayer> create(MediaPlayerClient&);
virtual ~MediaPlayer();
void invalidate();
// Media engine support.
enum SupportsType { IsNotSupported, IsSupported, MayBeSupported };
static MediaPlayer::SupportsType supportsType(const MediaEngineSupportParameters&, const MediaPlayerSupportsTypeClient*);
static void getSupportedTypes(HashSet<String, ASCIICaseInsensitiveHash>&);
static bool isAvailable();
static HashSet<RefPtr<SecurityOrigin>> originsInMediaCache(const String& path);
static void clearMediaCache(const String& path, std::chrono::system_clock::time_point modifiedSince);
static void clearMediaCacheForOrigins(const String& path, const HashSet<RefPtr<SecurityOrigin>>&);
static bool supportsKeySystem(const String& keySystem, const String& mimeType);
bool supportsFullscreen() const;
bool supportsScanning() const;
bool canSaveMediaData() const;
bool requiresImmediateCompositing() const;
bool doesHaveAttribute(const AtomicString&, AtomicString* value = nullptr) const;
PlatformMedia platformMedia() const;
PlatformLayer* platformLayer() const;
#if PLATFORM(IOS) || (PLATFORM(MAC) && ENABLE(VIDEO_PRESENTATION_MODE))
void setVideoFullscreenLayer(PlatformLayer*, std::function<void()> completionHandler = [] { });
void setVideoFullscreenFrame(FloatRect);
using MediaPlayerEnums::VideoGravity;
void setVideoFullscreenGravity(VideoGravity);
void setVideoFullscreenMode(VideoFullscreenMode);
VideoFullscreenMode fullscreenMode() const;
#endif
#if PLATFORM(IOS)
NSArray *timedMetadata() const;
String accessLog() const;
String errorLog() const;
#endif
FloatSize naturalSize();
bool hasVideo() const;
bool hasAudio() const;
bool inMediaDocument() const;
IntSize size() const { return m_size; }
void setSize(const IntSize& size);
bool load(const URL&, const ContentType&, const String& keySystem);
#if ENABLE(MEDIA_SOURCE)
bool load(const URL&, const ContentType&, MediaSourcePrivateClient*);
#endif
#if ENABLE(MEDIA_STREAM)
bool load(MediaStreamPrivate*);
#endif
void cancelLoad();
bool visible() const;
void setVisible(bool);
void prepareToPlay();
void play();
void pause();
void setShouldBufferData(bool);
#if ENABLE(LEGACY_ENCRYPTED_MEDIA)
// Represents synchronous exceptions that can be thrown from the Encrypted Media methods.
// This is different from the asynchronous MediaKeyError.
enum MediaKeyException { NoError, InvalidPlayerState, KeySystemNotSupported };
std::unique_ptr<CDMSession> createSession(const String& keySystem, CDMSessionClient*);
void setCDMSession(CDMSession*);
void keyAdded();
#endif
bool paused() const;
bool seeking() const;
static double invalidTime() { return -1.0;}
MediaTime duration() const;
MediaTime currentTime() const;
void seek(const MediaTime&);
void seekWithTolerance(const MediaTime&, const MediaTime& negativeTolerance, const MediaTime& positiveTolerance);
MediaTime startTime() const;
MediaTime initialTime() const;
MediaTime getStartDate() const;
double rate() const;
void setRate(double);
double requestedRate() const;
bool preservesPitch() const;
void setPreservesPitch(bool);
std::unique_ptr<PlatformTimeRanges> buffered();
std::unique_ptr<PlatformTimeRanges> seekable();
MediaTime minTimeSeekable();
MediaTime maxTimeSeekable();
bool didLoadingProgress();
double volume() const;
void setVolume(double);
bool platformVolumeConfigurationRequired() const { return client().mediaPlayerPlatformVolumeConfigurationRequired(); }
bool muted() const;
void setMuted(bool);
bool hasClosedCaptions() const;
void setClosedCaptionsVisible(bool closedCaptionsVisible);
bool autoplay() const;
void setAutoplay(bool);
void paint(GraphicsContext&, const FloatRect&);
void paintCurrentFrameInContext(GraphicsContext&, const FloatRect&);
// copyVideoTextureToPlatformTexture() is used to do the GPU-GPU textures copy without a readback to system memory.
// The first five parameters denote the corresponding GraphicsContext, destination texture, requested level, requested type and the required internalFormat for destination texture.
// The last two parameters premultiplyAlpha and flipY denote whether addtional premultiplyAlpha and flip operation are required during the copy.
// It returns true on success and false on failure.
// In the GPU-GPU textures copy, the source texture(Video texture) should have valid target, internalFormat and size, etc.
// The destination texture may need to be resized to to the dimensions of the source texture or re-defined to the required internalFormat.
// The current restrictions require that format shoud be RGB or RGBA, type should be UNSIGNED_BYTE and level should be 0. It may be lifted in the future.
// Each platform port can have its own implementation on this function. The default implementation for it is a single "return false" in MediaPlayerPrivate.h.
// In chromium, the implementation is based on GL_CHROMIUM_copy_texture extension which is documented at
// http://src.chromium.org/viewvc/chrome/trunk/src/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt and implemented at
// http://src.chromium.org/viewvc/chrome/trunk/src/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc via shaders.
bool copyVideoTextureToPlatformTexture(GraphicsContext3D*, Platform3DObject texture, GC3Denum target, GC3Dint level, GC3Denum internalFormat, GC3Denum format, GC3Denum type, bool premultiplyAlpha, bool flipY);
NativeImagePtr nativeImageForCurrentTime();
using MediaPlayerEnums::NetworkState;
NetworkState networkState();
using MediaPlayerEnums::ReadyState;
ReadyState readyState();
using MediaPlayerEnums::MovieLoadType;
MovieLoadType movieLoadType() const;
using MediaPlayerEnums::Preload;
Preload preload() const;
void setPreload(Preload);
void networkStateChanged();
void readyStateChanged();
void volumeChanged(double);
void muteChanged(bool);
void timeChanged();
void sizeChanged();
void rateChanged();
void playbackStateChanged();
void durationChanged();
void firstVideoFrameAvailable();
void characteristicChanged();
void repaint();
MediaPlayerClient& client() const { return *m_client; }
bool hasAvailableVideoFrame() const;
void prepareForRendering();
bool canLoadPoster() const;
void setPoster(const String&);
#if USE(NATIVE_FULLSCREEN_VIDEO)
void enterFullscreen();
void exitFullscreen();
#endif
#if ENABLE(WIRELESS_PLAYBACK_TARGET)
enum WirelessPlaybackTargetType { TargetTypeNone, TargetTypeAirPlay, TargetTypeTVOut };
WirelessPlaybackTargetType wirelessPlaybackTargetType() const;
String wirelessPlaybackTargetName() const;
bool wirelessVideoPlaybackDisabled() const;
void setWirelessVideoPlaybackDisabled(bool);
void currentPlaybackTargetIsWirelessChanged();
void playbackTargetAvailabilityChanged();
bool isCurrentPlaybackTargetWireless() const;
bool canPlayToWirelessPlaybackTarget() const;
void setWirelessPlaybackTarget(Ref<MediaPlaybackTarget>&&);
void setShouldPlayToPlaybackTarget(bool);
#endif
double minFastReverseRate() const;
double maxFastForwardRate() const;
#if USE(NATIVE_FULLSCREEN_VIDEO)
bool canEnterFullscreen() const;
#endif
// whether accelerated rendering is supported by the media engine for the current media.
bool supportsAcceleratedRendering() const;
// called when the rendering system flips the into or out of accelerated rendering mode.
void acceleratedRenderingStateChanged();
bool shouldMaintainAspectRatio() const;
void setShouldMaintainAspectRatio(bool);
#if PLATFORM(WIN) && USE(AVFOUNDATION)
GraphicsDeviceAdapter* graphicsDeviceAdapter() const;
#endif
bool hasSingleSecurityOrigin() const;
bool didPassCORSAccessCheck() const;
MediaTime mediaTimeForTimeValue(const MediaTime&) const;
double maximumDurationToCacheMediaTime() const;
unsigned decodedFrameCount() const;
unsigned droppedFrameCount() const;
unsigned audioDecodedByteCount() const;
unsigned videoDecodedByteCount() const;
void setPrivateBrowsingMode(bool);
#if ENABLE(WEB_AUDIO)
AudioSourceProvider* audioSourceProvider();
#endif
#if ENABLE(LEGACY_ENCRYPTED_MEDIA)
RefPtr<ArrayBuffer> cachedKeyForKeyId(const String& keyId) const;
bool keyNeeded(Uint8Array* initData);
String mediaKeysStorageDirectory() const;
#endif
String referrer() const;
String userAgent() const;
String engineDescription() const;
long platformErrorCode() const;
CachedResourceLoader* cachedResourceLoader();
PassRefPtr<PlatformMediaResourceLoader> createResourceLoader();
#if ENABLE(VIDEO_TRACK)
void addAudioTrack(AudioTrackPrivate&);
void addTextTrack(InbandTextTrackPrivate&);
void addVideoTrack(VideoTrackPrivate&);
void removeAudioTrack(AudioTrackPrivate&);
void removeTextTrack(InbandTextTrackPrivate&);
void removeVideoTrack(VideoTrackPrivate&);
bool requiresTextTrackRepresentation() const;
void setTextTrackRepresentation(TextTrackRepresentation*);
void syncTextTrackBounds();
void tracksChanged();
#if ENABLE(AVF_CAPTIONS)
void notifyTrackModeChanged();
Vector<RefPtr<PlatformTextTrack>> outOfBandTrackSources();
#endif
#endif
#if PLATFORM(IOS)
String mediaPlayerNetworkInterfaceName() const;
bool getRawCookies(const URL&, Vector<Cookie>&) const;
#endif
static void resetMediaEngines();
#if USE(GSTREAMER)
WEBCORE_EXPORT void simulateAudioInterruption();
#endif
String languageOfPrimaryAudioTrack() const;
size_t extraMemoryCost() const;
unsigned long long fileSize() const;
#if ENABLE(MEDIA_SOURCE)
unsigned long totalVideoFrames();
unsigned long droppedVideoFrames();
unsigned long corruptedVideoFrames();
MediaTime totalFrameDelay();
#endif
bool shouldWaitForResponseToAuthenticationChallenge(const AuthenticationChallenge&);
void handlePlaybackCommand(PlatformMediaSession::RemoteControlCommandType);
String sourceApplicationIdentifier() const;
Vector<String> preferredAudioCharacteristics() const;
bool ended() const;
void setShouldDisableSleep(bool);
bool shouldDisableSleep() const;
private:
MediaPlayer(MediaPlayerClient&);
const MediaPlayerFactory* nextBestMediaEngine(const MediaPlayerFactory*) const;
void loadWithNextMediaEngine(const MediaPlayerFactory*);
void reloadTimerFired();
static void initializeMediaEngines();
MediaPlayerClient* m_client;
Timer m_reloadTimer;
std::unique_ptr<MediaPlayerPrivateInterface> m_private;
const MediaPlayerFactory* m_currentMediaEngine;
URL m_url;
String m_contentMIMEType;
String m_contentTypeCodecs;
String m_keySystem;
IntSize m_size;
Preload m_preload;
bool m_visible;
double m_volume;
bool m_muted;
bool m_preservesPitch;
bool m_privateBrowsing;
bool m_shouldPrepareToRender;
bool m_contentMIMETypeWasInferredFromExtension;
bool m_initializingMediaEngine { false };
#if ENABLE(MEDIA_SOURCE)
RefPtr<MediaSourcePrivateClient> m_mediaSource;
#endif
#if ENABLE(MEDIA_STREAM)
RefPtr<MediaStreamPrivate> m_mediaStream;
#endif
};
typedef std::function<std::unique_ptr<MediaPlayerPrivateInterface> (MediaPlayer*)> CreateMediaEnginePlayer;
typedef void (*MediaEngineSupportedTypes)(HashSet<String, ASCIICaseInsensitiveHash>& types);
typedef MediaPlayer::SupportsType (*MediaEngineSupportsType)(const MediaEngineSupportParameters& parameters);
typedef HashSet<RefPtr<SecurityOrigin>> (*MediaEngineOriginsInMediaCache)(const String& path);
typedef void (*MediaEngineClearMediaCache)(const String& path, std::chrono::system_clock::time_point modifiedSince);
typedef void (*MediaEngineClearMediaCacheForOrigins)(const String& path, const HashSet<RefPtr<SecurityOrigin>>&);
typedef bool (*MediaEngineSupportsKeySystem)(const String& keySystem, const String& mimeType);
typedef void (*MediaEngineRegistrar)(CreateMediaEnginePlayer, MediaEngineSupportedTypes, MediaEngineSupportsType,
MediaEngineOriginsInMediaCache, MediaEngineClearMediaCache, MediaEngineClearMediaCacheForOrigins, MediaEngineSupportsKeySystem);
typedef void (*MediaEngineRegister)(MediaEngineRegistrar);
class MediaPlayerFactorySupport {
public:
WEBCORE_EXPORT static void callRegisterMediaEngine(MediaEngineRegister);
};
}
#endif // ENABLE(VIDEO)
#endif