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Diffstat (limited to 'dom/media/MediaDecoderOwner.h')
| -rw-r--r-- | dom/media/MediaDecoderOwner.h | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/dom/media/MediaDecoderOwner.h b/dom/media/MediaDecoderOwner.h new file mode 100644 index 0000000000..f53a59f193 --- /dev/null +++ b/dom/media/MediaDecoderOwner.h @@ -0,0 +1,200 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et cindent: */ +/* 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 MediaDecoderOwner_h_ +#define MediaDecoderOwner_h_ + +#include "mozilla/UniquePtr.h" +#include "MediaInfo.h" +#include "MediaSegment.h" +#include "nsSize.h" + +namespace mozilla { + +class AbstractThread; +class GMPCrashHelper; +class VideoFrameContainer; +class MediaInfo; +class MediaResult; +enum class RFPTarget : uint64_t; + +namespace dom { +class Document; +class HTMLMediaElement; +} // namespace dom + +class MediaDecoderOwner { + public: + // Called by the media decoder to indicate that the download is progressing. + virtual void DownloadProgressed() = 0; + + // Dispatch an asynchronous event to the decoder owner + virtual void DispatchAsyncEvent(const nsAString& aName) = 0; + + // Triggers a recomputation of readyState. + virtual void UpdateReadyState() = 0; + + // Called by the decoder object to notify owner might need to dispatch the + // `timeupdate` event due to current time changes. + virtual void MaybeQueueTimeupdateEvent() = 0; + + // Return true if decoding should be paused + virtual bool GetPaused() = 0; + + // Called by the video decoder object, on the main thread, + // when it has read the metadata containing video dimensions, + // etc. + // Must take ownership of MetadataTags aTags argument. + virtual void MetadataLoaded(const MediaInfo* aInfo, + UniquePtr<const MetadataTags> aTags) = 0; + + // Called by the decoder object, on the main thread, + // when it has read the first frame of the video or audio. + virtual void FirstFrameLoaded() = 0; + + // Called by the decoder object, on the main thread, + // when the resource has a network error during loading. + // The decoder owner should call Shutdown() on the decoder and drop the + // reference to the decoder to prevent further calls into the decoder. + virtual void NetworkError(const MediaResult& aError) = 0; + + // Called by the decoder object, on the main thread, when the + // resource has a decode error during metadata loading or decoding. + // The decoder owner should call Shutdown() on the decoder and drop the + // reference to the decoder to prevent further calls into the decoder. + virtual void DecodeError(const MediaResult& aError) = 0; + + // Called by the decoder object, on the main thread, when the + // resource has a decode issue during metadata loading or decoding, but can + // continue decoding. + virtual void DecodeWarning(const MediaResult& aError) = 0; + + // Return true if media element error attribute is not null. + virtual bool HasError() const = 0; + + // Called by the video decoder object, on the main thread, when the + // resource load has been cancelled. + virtual void LoadAborted() = 0; + + // Called by the video decoder object, on the main thread, + // when the video playback has ended. + virtual void PlaybackEnded() = 0; + + // Called by the video decoder object, on the main thread, + // when the resource has started seeking. + virtual void SeekStarted() = 0; + + // Called by the video decoder object, on the main thread, + // when the resource has completed seeking. + virtual void SeekCompleted() = 0; + + // Called by the video decoder object, on the main thread, + // when the resource has aborted seeking. + virtual void SeekAborted() = 0; + + // Called by the media stream, on the main thread, when the download + // has been suspended by the cache or because the element itself + // asked the decoder to suspend the download. + virtual void DownloadSuspended() = 0; + + // Called by the media decoder to indicate whether the media cache has + // suspended the channel. + virtual void NotifySuspendedByCache(bool aSuspendedByCache) = 0; + + // called to notify that the principal of the decoder's media resource has + // changed. + virtual void NotifyDecoderPrincipalChanged() = 0; + + // The status of the next frame which might be available from the decoder + enum NextFrameStatus { + // The next frame of audio/video is available + NEXT_FRAME_AVAILABLE, + // The next frame of audio/video is unavailable because the decoder + // is paused while it buffers up data + NEXT_FRAME_UNAVAILABLE_BUFFERING, + // The next frame of audio/video is unavailable for the decoder is seeking. + NEXT_FRAME_UNAVAILABLE_SEEKING, + // The next frame of audio/video is unavailable for some other reasons + NEXT_FRAME_UNAVAILABLE, + // Sentinel value + NEXT_FRAME_UNINITIALIZED + }; + + // Called by media decoder when the audible state changed + virtual void SetAudibleState(bool aAudible) = 0; + + // Notified by the decoder that XPCOM shutdown has begun. + // The decoder owner should call Shutdown() on the decoder and drop the + // reference to the decoder to prevent further calls into the decoder. + virtual void NotifyXPCOMShutdown() = 0; + + // Dispatches a "encrypted" event to the HTMLMediaElement, with the + // provided init data. Actual dispatch may be delayed until HAVE_METADATA. + // Main thread only. + virtual void DispatchEncrypted(const nsTArray<uint8_t>& aInitData, + const nsAString& aInitDataType) = 0; + + // Notified by the decoder that a decryption key is required before emitting + // further output. + virtual void NotifyWaitingForKey() {} + + /* + * Methods that are used only in Gecko go here. We provide defaul + * implementations so they can compile in Servo without modification. + */ + // Return an abstract thread on which to run main thread runnables. + virtual AbstractThread* AbstractMainThread() const { return nullptr; } + + // Get the HTMLMediaElement object if the decoder is being used from an + // HTML media element, and null otherwise. + virtual dom::HTMLMediaElement* GetMediaElement() { return nullptr; } + + // Called by the media decoder and the video frame to get the + // ImageContainer containing the video data. + virtual VideoFrameContainer* GetVideoFrameContainer() { return nullptr; } + + // Return the decoder owner's owner document. + virtual mozilla::dom::Document* GetDocument() const { return nullptr; } + + // Called by the media decoder to create a GMPCrashHelper. + virtual already_AddRefed<GMPCrashHelper> CreateGMPCrashHelper() { + return nullptr; + } + + // Called by the frame container to notify the layout engine that the + // size of the image has changed, or the video needs to be be repainted + // for some other reason. + enum class ImageSizeChanged { No, Yes }; + enum class ForceInvalidate { No, Yes }; + virtual void Invalidate(ImageSizeChanged aImageSizeChanged, + const Maybe<nsIntSize>& aNewIntrinsicSize, + ForceInvalidate aForceInvalidate) {} + + // Called after the MediaStream we're playing rendered a frame to aContainer + // with a different principalHandle than the previous frame. + virtual void PrincipalHandleChangedForVideoFrameContainer( + VideoFrameContainer* aContainer, + const PrincipalHandle& aNewPrincipalHandle) {} + + // Called after the MediaDecoder has installed the given secondary video + // container and render potential frames to it. + virtual void OnSecondaryVideoContainerInstalled( + const RefPtr<VideoFrameContainer>& aSecondaryContainer) {} + + // Return true is the owner is actually invisible to users. + virtual bool IsActuallyInvisible() const = 0; + + // Returns true if the owner should resist fingerprinting. + virtual bool ShouldResistFingerprinting(RFPTarget aTarget) const = 0; + + /* + * Servo only methods go here. Please provide default implementations so they + * can build in Gecko without any modification. + */ +}; + +} // namespace mozilla + +#endif |