mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-27 02:43:07 +00:00
105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
/* -*- 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 VIDEOFRAMECONTAINER_H_
|
|
#define VIDEOFRAMECONTAINER_H_
|
|
|
|
#include "mozilla/Mutex.h"
|
|
#include "mozilla/TimeStamp.h"
|
|
#include "gfxPoint.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsAutoPtr.h"
|
|
|
|
namespace mozilla {
|
|
|
|
namespace dom {
|
|
class HTMLMediaElement;
|
|
}
|
|
|
|
namespace layers {
|
|
class Image;
|
|
class ImageContainer;
|
|
}
|
|
|
|
/**
|
|
* This object is used in the decoder backend threads and the main thread
|
|
* to manage the "current video frame" state. This state includes timing data
|
|
* and an intrinsic size (see below).
|
|
* This has to be a thread-safe object since it's accessed by resource decoders
|
|
* and other off-main-thread components. So we can't put this state in the media
|
|
* element itself ... well, maybe we could, but it could be risky and/or
|
|
* confusing.
|
|
*/
|
|
class VideoFrameContainer {
|
|
~VideoFrameContainer();
|
|
|
|
public:
|
|
typedef layers::ImageContainer ImageContainer;
|
|
typedef layers::Image Image;
|
|
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VideoFrameContainer)
|
|
|
|
VideoFrameContainer(dom::HTMLMediaElement* aElement,
|
|
already_AddRefed<ImageContainer> aContainer);
|
|
|
|
// Call on any thread
|
|
void SetCurrentFrame(const gfxIntSize& aIntrinsicSize, Image* aImage,
|
|
TimeStamp aTargetTime);
|
|
void ClearCurrentFrame(bool aResetSize = false);
|
|
// Reset the VideoFrameContainer
|
|
void Reset();
|
|
// Time in seconds by which the last painted video frame was late by.
|
|
// E.g. if the last painted frame should have been painted at time t,
|
|
// but was actually painted at t+n, this returns n in seconds. Threadsafe.
|
|
double GetFrameDelay();
|
|
// Call on main thread
|
|
enum {
|
|
INVALIDATE_DEFAULT,
|
|
INVALIDATE_FORCE
|
|
};
|
|
void Invalidate() { InvalidateWithFlags(INVALIDATE_DEFAULT); }
|
|
void InvalidateWithFlags(uint32_t aFlags);
|
|
ImageContainer* GetImageContainer();
|
|
void ForgetElement() { mElement = nullptr; }
|
|
|
|
protected:
|
|
// Non-addreffed pointer to the element. The element calls ForgetElement
|
|
// to clear this reference when the element is destroyed.
|
|
dom::HTMLMediaElement* mElement;
|
|
nsRefPtr<ImageContainer> mImageContainer;
|
|
|
|
// mMutex protects all the fields below.
|
|
Mutex mMutex;
|
|
// The intrinsic size is the ideal size which we should render the
|
|
// ImageContainer's current Image at.
|
|
// This can differ from the Image's actual size when the media resource
|
|
// specifies that the Image should be stretched to have the correct aspect
|
|
// ratio.
|
|
gfxIntSize mIntrinsicSize;
|
|
// The time at which the current video frame should have been painted.
|
|
// Access protected by mVideoUpdateLock.
|
|
TimeStamp mPaintTarget;
|
|
// The delay between the last video frame being presented and it being
|
|
// painted. This is time elapsed after mPaintTarget until the most recently
|
|
// painted frame appeared on screen.
|
|
TimeDuration mPaintDelay;
|
|
// True when the intrinsic size has been changed by SetCurrentFrame() since
|
|
// the last call to Invalidate().
|
|
// The next call to Invalidate() will recalculate
|
|
// and update the intrinsic size on the element, request a frame reflow and
|
|
// then reset this flag.
|
|
bool mIntrinsicSizeChanged;
|
|
// True when the Image size has changed since the last time Invalidate() was
|
|
// called. When set, the next call to Invalidate() will ensure that the
|
|
// frame is fully invalidated instead of just invalidating for the image change
|
|
// in the ImageLayer.
|
|
bool mImageSizeChanged;
|
|
};
|
|
|
|
}
|
|
|
|
#endif /* VIDEOFRAMECONTAINER_H_ */
|