Source code

Revision control

Other Tools

/* -*- 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"
#ifdef MOZ_WIDGET_ANDROID
# include "GLImages.h" // for SurfaceTextureImage
#endif
#include "MediaDecoderOwner.h"
#include "mozilla/Telemetry.h"
#include "mozilla/AbstractThread.h"
using namespace mozilla::layers;
namespace mozilla {
#define NS_DispatchToMainThread(...) CompileError_UseAbstractMainThreadInstead
namespace {
template <Telemetry::HistogramID ID>
class AutoTimer {
// Set a threshold to reduce performance overhead
// for we're measuring hot spots.
static const uint32_t sThresholdMS = 1000;
public:
~AutoTimer() {
auto end = TimeStamp::Now();
auto diff = uint32_t((end - mStart).ToMilliseconds());
if (diff > sThresholdMS) {
Telemetry::Accumulate(ID, diff);
}
}
private:
const TimeStamp mStart = TimeStamp::Now();
};
} // namespace
VideoFrameContainer::VideoFrameContainer(
MediaDecoderOwner* aOwner, already_AddRefed<ImageContainer> aContainer)
: mOwner(aOwner),
mImageContainer(aContainer),
mMutex("nsVideoFrameContainer"),
mFrameID(0),
mPendingPrincipalHandle(PRINCIPAL_HANDLE_NONE),
mFrameIDForPendingPrincipalHandle(0),
mMainThread(aOwner->AbstractMainThread()) {
NS_ASSERTION(aOwner, "aOwner must not be null");
NS_ASSERTION(mImageContainer, "aContainer must not be null");
}
VideoFrameContainer::~VideoFrameContainer() = default;
PrincipalHandle VideoFrameContainer::GetLastPrincipalHandle() {
MutexAutoLock lock(mMutex);
return GetLastPrincipalHandleLocked();
}
PrincipalHandle VideoFrameContainer::GetLastPrincipalHandleLocked() {
return mLastPrincipalHandle;
}
void VideoFrameContainer::UpdatePrincipalHandleForFrameID(
const PrincipalHandle& aPrincipalHandle,
const ImageContainer::FrameID& aFrameID) {
MutexAutoLock lock(mMutex);
UpdatePrincipalHandleForFrameIDLocked(aPrincipalHandle, aFrameID);
}
void VideoFrameContainer::UpdatePrincipalHandleForFrameIDLocked(
const PrincipalHandle& aPrincipalHandle,
const ImageContainer::FrameID& aFrameID) {
if (mPendingPrincipalHandle == aPrincipalHandle) {
return;
}
mPendingPrincipalHandle = aPrincipalHandle;
mFrameIDForPendingPrincipalHandle = aFrameID;
}
#ifdef MOZ_WIDGET_ANDROID
static void NotifySetCurrent(Image* aImage) {
if (aImage == nullptr) {
return;
}
SurfaceTextureImage* image = aImage->AsSurfaceTextureImage();
if (image == nullptr) {
return;
}
image->OnSetCurrent();
}
#endif
void VideoFrameContainer::SetCurrentFrame(const gfx::IntSize& aIntrinsicSize,
Image* aImage,
const TimeStamp& aTargetTime) {
#ifdef MOZ_WIDGET_ANDROID
NotifySetCurrent(aImage);
#endif
if (aImage) {
MutexAutoLock lock(mMutex);
AutoTArray<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) {
#ifdef MOZ_WIDGET_ANDROID
// When there are multiple frames, only the last one is effective
// (see bug 1299068 comment 4). Here I just count on VideoSink and VideoOutput
// to send one frame at a time and warn if not.
Unused << NS_WARN_IF(aImages.Length() > 1);
for (auto& image : aImages) {
NotifySetCurrent(image.mImage);
}
#endif
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;
RefPtr<VideoFrameContainer> self = this;
mMainThread->Dispatch(NS_NewRunnableFunction(
"IntrinsicSizeChanged", [this, self, aIntrinsicSize]() {
mMainThreadState.mIntrinsicSize = aIntrinsicSize;
mMainThreadState.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> oldImages;
mImageContainer->GetCurrentImages(&oldImages);
PrincipalHandle principalHandle = PRINCIPAL_HANDLE_NONE;
ImageContainer::FrameID lastFrameIDForOldPrincipalHandle =
mFrameIDForPendingPrincipalHandle - 1;
if (mPendingPrincipalHandle != PRINCIPAL_HANDLE_NONE &&
((!oldImages.IsEmpty() &&
oldImages.LastElement().mFrameID >= lastFrameIDForOldPrincipalHandle) ||
(!aImages.IsEmpty() &&
aImages[0].mFrameID > lastFrameIDForOldPrincipalHandle))) {
// We are releasing the last FrameID prior to
// `lastFrameIDForOldPrincipalHandle` OR there are no FrameIDs prior to
// `lastFrameIDForOldPrincipalHandle` in the new set of images. This means
// that the old principal handle has been flushed out and we can notify our
// video element about this change.
principalHandle = mPendingPrincipalHandle;
mLastPrincipalHandle = mPendingPrincipalHandle;
mPendingPrincipalHandle = PRINCIPAL_HANDLE_NONE;
mFrameIDForPendingPrincipalHandle = 0;
}
if (aImages.IsEmpty()) {
mImageContainer->ClearAllImages();
} else {
mImageContainer->SetCurrentImages(aImages);
}
gfx::IntSize newFrameSize = mImageContainer->GetCurrentSize();
bool imageSizeChanged = (oldFrameSize != newFrameSize);
if (principalHandle != PRINCIPAL_HANDLE_NONE || imageSizeChanged) {
RefPtr<VideoFrameContainer> self = this;
mMainThread->Dispatch(NS_NewRunnableFunction(
"PrincipalHandleOrImageSizeChanged",
[this, self, principalHandle, imageSizeChanged]() {
mMainThreadState.mImageSizeChanged = imageSizeChanged;
if (mOwner && principalHandle != PRINCIPAL_HANDLE_NONE) {
mOwner->PrincipalHandleChangedForVideoFrameContainer(
this, principalHandle);
}
}));
}
}
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();
mImageContainer->ClearCachedResources();
}
void VideoFrameContainer::ClearFutureFrames(TimeStamp aNow) {
MutexAutoLock lock(mMutex);
// See comment in SetCurrentFrame for the reasoning behind
// using a kungFuDeathGrip here.
AutoTArray<ImageContainer::OwningImage, 10> kungFuDeathGrip;
mImageContainer->GetCurrentImages(&kungFuDeathGrip);
if (!kungFuDeathGrip.IsEmpty()) {
AutoTArray<ImageContainer::NonOwningImage, 1> currentFrame;
ImageContainer::OwningImage& img = kungFuDeathGrip[0];
// Find the current image in case there are several.
for (const auto& image : kungFuDeathGrip) {
if (image.mTimeStamp > aNow) {
break;
}
img = image;
}
currentFrame.AppendElement(ImageContainer::NonOwningImage(
img.mImage, img.mTimeStamp, img.mFrameID, img.mProducerID));
mImageContainer->SetCurrentImages(currentFrame);
}
}
void VideoFrameContainer::ClearCachedResources() {
mImageContainer->ClearCachedResources();
}
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 (!mOwner) {
// Owner has been destroyed
return;
}
bool imageSizeChanged = mMainThreadState.mImageSizeChanged;
mMainThreadState.mImageSizeChanged = false;
Maybe<nsIntSize> intrinsicSize;
if (mMainThreadState.mIntrinsicSizeChanged) {
intrinsicSize = Some(mMainThreadState.mIntrinsicSize);
mMainThreadState.mIntrinsicSizeChanged = false;
}
bool forceInvalidate = aFlags & INVALIDATE_FORCE;
mOwner->Invalidate(imageSizeChanged, intrinsicSize, forceInvalidate);
}
} // namespace mozilla
#undef NS_DispatchToMainThread