tenfourfox/dom/media/VideoFrameContainer.cpp

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2017-04-19 07:56:45 +00:00
/* -*- 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/. */
#include "VideoFrameContainer.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "nsIFrame.h"
#include "nsDisplayList.h"
#include "nsSVGEffects.h"
using namespace mozilla::layers;
namespace mozilla {
VideoFrameContainer::VideoFrameContainer(dom::HTMLMediaElement* aElement,
already_AddRefed<ImageContainer> aContainer)
: mElement(aElement),
mImageContainer(aContainer), mMutex("nsVideoFrameContainer"),
mFrameID(0),
mIntrinsicSizeChanged(false), mImageSizeChanged(false)
{
NS_ASSERTION(aElement, "aElement must not be null");
NS_ASSERTION(mImageContainer, "aContainer must not be null");
}
VideoFrameContainer::~VideoFrameContainer()
{}
void VideoFrameContainer::SetCurrentFrame(const gfx::IntSize& aIntrinsicSize,
Image* aImage,
const TimeStamp& aTargetTime)
{
if (aImage) {
MutexAutoLock lock(mMutex);
nsAutoTArray<ImageContainer::NonOwningImage,1> imageList;
imageList.AppendElement(
ImageContainer::NonOwningImage(aImage, aTargetTime, ++mFrameID));
SetCurrentFramesLocked(aIntrinsicSize, imageList);
} else {
ClearCurrentFrame(aIntrinsicSize);
}
}
void VideoFrameContainer::SetCurrentFrames(const gfx::IntSize& aIntrinsicSize,
const nsTArray<ImageContainer::NonOwningImage>& aImages)
{
MutexAutoLock lock(mMutex);
SetCurrentFramesLocked(aIntrinsicSize, aImages);
}
void VideoFrameContainer::SetCurrentFramesLocked(const gfx::IntSize& aIntrinsicSize,
const nsTArray<ImageContainer::NonOwningImage>& aImages)
{
mMutex.AssertCurrentThreadOwns();
if (aIntrinsicSize != mIntrinsicSize) {
mIntrinsicSize = aIntrinsicSize;
mIntrinsicSizeChanged = true;
}
gfx::IntSize oldFrameSize = mImageContainer->GetCurrentSize();
// When using the OMX decoder, destruction of the current image can indirectly
// block on main thread I/O. If we let this happen while holding onto
// |mImageContainer|'s lock, then when the main thread then tries to
// composite it can then block on |mImageContainer|'s lock, causing a
// deadlock. We use this hack to defer the destruction of the current image
// until it is safe.
nsTArray<ImageContainer::OwningImage> kungFuDeathGrip;
mImageContainer->GetCurrentImages(&kungFuDeathGrip);
if (aImages.IsEmpty()) {
mImageContainer->ClearAllImages();
} else {
mImageContainer->SetCurrentImages(aImages);
}
gfx::IntSize newFrameSize = mImageContainer->GetCurrentSize();
if (oldFrameSize != newFrameSize) {
mImageSizeChanged = true;
}
}
void VideoFrameContainer::ClearCurrentFrame()
{
MutexAutoLock lock(mMutex);
// See comment in SetCurrentFrame for the reasoning behind
// using a kungFuDeathGrip here.
nsTArray<ImageContainer::OwningImage> kungFuDeathGrip;
mImageContainer->GetCurrentImages(&kungFuDeathGrip);
mImageContainer->ClearAllImages();
}
void VideoFrameContainer::ClearFutureFrames()
{
MutexAutoLock lock(mMutex);
// See comment in SetCurrentFrame for the reasoning behind
// using a kungFuDeathGrip here.
nsTArray<ImageContainer::OwningImage> kungFuDeathGrip;
mImageContainer->GetCurrentImages(&kungFuDeathGrip);
if (!kungFuDeathGrip.IsEmpty()) {
nsTArray<ImageContainer::NonOwningImage> currentFrame;
const ImageContainer::OwningImage& img = kungFuDeathGrip[0];
currentFrame.AppendElement(ImageContainer::NonOwningImage(img.mImage,
img.mTimeStamp, img.mFrameID, img.mProducerID));
mImageContainer->SetCurrentImages(currentFrame);
}
}
ImageContainer* VideoFrameContainer::GetImageContainer() {
return mImageContainer;
}
double VideoFrameContainer::GetFrameDelay()
{
return mImageContainer->GetPaintDelay().ToSeconds();
}
void VideoFrameContainer::InvalidateWithFlags(uint32_t aFlags)
{
NS_ASSERTION(NS_IsMainThread(), "Must call on main thread");
if (!mElement) {
// Element has been destroyed
return;
}
nsIFrame* frame = mElement->GetPrimaryFrame();
bool invalidateFrame = false;
{
MutexAutoLock lock(mMutex);
// Get mImageContainerSizeChanged while holding the lock.
invalidateFrame = mImageSizeChanged;
mImageSizeChanged = false;
if (mIntrinsicSizeChanged) {
mElement->UpdateMediaSize(mIntrinsicSize);
mIntrinsicSizeChanged = false;
if (frame) {
nsPresContext* presContext = frame->PresContext();
nsIPresShell *presShell = presContext->PresShell();
presShell->FrameNeedsReflow(frame,
nsIPresShell::eStyleChange,
NS_FRAME_IS_DIRTY);
}
}
}
bool asyncInvalidate = mImageContainer &&
mImageContainer->IsAsync() &&
!(aFlags & INVALIDATE_FORCE);
if (frame) {
if (invalidateFrame) {
frame->InvalidateFrame();
} else {
frame->InvalidateLayer(nsDisplayItem::TYPE_VIDEO, nullptr, nullptr,
asyncInvalidate ? nsIFrame::UPDATE_IS_ASYNC : 0);
}
}
nsSVGEffects::InvalidateDirectRenderingObservers(mElement);
}
} // namespace mozilla