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/* -*- Mode: C++; tab-width: 2; 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 MediaDecoderOwner_h_
#define MediaDecoderOwner_h_
#include "AbstractMediaDecoder.h"
#include "nsAutoPtr.h"
namespace mozilla {
class VideoFrameContainer;
class MediaResult;
namespace dom {
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 nsresult DispatchAsyncEvent(const nsAString& aName) = 0;
// Triggers a recomputation of readyState.
virtual void UpdateReadyState() = 0;
/**
* Fires a timeupdate event. If aPeriodic is true, the event will only
* be fired if we've not fired a timeupdate event (for any reason) in the
* last 250ms, as required by the spec when the current time is periodically
* increasing during playback.
*/
virtual void FireTimeUpdate(bool aPeriodic) = 0;
// Get the HTMLMediaElement object if the decoder is being used from an
// HTML media element, and null otherwise.
virtual dom::HTMLMediaElement* GetMediaElement()
{
return nullptr;
}
// 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,
nsAutoPtr<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() = 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;
// 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 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 stream, on the main thread, when the download
// has been resumed by the cache or because the element itself
// asked the decoder to resumed the download.
// If aForceNetworkLoading is True, ignore the fact that the download has
// previously finished. We are downloading the middle of the media after
// having downloaded the end, we need to notify the element a download in
// ongoing.
virtual void DownloadResumed(bool aForceNetworkLoading = false) = 0;
// Called by the media decoder to indicate whether the media cache has
// suspended the channel.
virtual void NotifySuspendedByCache(bool aIsSuspended) = 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
};
// Check if the decoder owner is active.
virtual bool IsActive() const = 0;
// Check if the decoder owner is hidden.
virtual bool IsHidden() const = 0;
// Called by the media decoder and the video frame to get the
// ImageContainer containing the video data.
virtual VideoFrameContainer* GetVideoFrameContainer() = 0;
// 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;
};
} // namespace mozilla
#endif
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