1 files changed, 261 insertions, 0 deletions
diff --git a/dom/media/VideoFrameContainer.cpp b/dom/media/VideoFrameContainer.cpp
new file mode 100644
index 0000000000..fb87fcf482
--- /dev/null
+++ b/dom/media/VideoFrameContainer.cpp
@@ -0,0 +1,261 @@
+/* -*- 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::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() {
+  MutexAutoLock lock(mMutex);
+  mImageContainer->ClearCachedResources();
+}
+
+ImageContainer* VideoFrameContainer::GetImageContainer() {
+  // Note - you'll need the lock to manipulate this.  The pointer is not
+  // modified from multiple threads, just the data pointed to by it.
+  return mImageContainer;
+}
+
+double VideoFrameContainer::GetFrameDelay() {
+  MutexAutoLock lock(mMutex);
+  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