1 files changed, 121 insertions, 0 deletions
diff --git a/dom/media/VideoSegment.cpp b/dom/media/VideoSegment.cpp
new file mode 100644
index 000000000..48e4760ba
--- /dev/null
+++ b/dom/media/VideoSegment.cpp
@@ -0,0 +1,121 @@
+/* -*- 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/. */
+
+#include "VideoSegment.h"
+
+#include "gfx2DGlue.h"
+#include "ImageContainer.h"
+#include "Layers.h"
+#include "mozilla/UniquePtr.h"
+
+namespace mozilla {
+
+using namespace layers;
+
+VideoFrame::VideoFrame(already_AddRefed<Image>& aImage,
+                       const gfx::IntSize& aIntrinsicSize)
+  : mImage(aImage), mIntrinsicSize(aIntrinsicSize), mForceBlack(false),
+    mPrincipalHandle(PRINCIPAL_HANDLE_NONE)
+{}
+
+VideoFrame::VideoFrame()
+  : mIntrinsicSize(0, 0), mForceBlack(false), mPrincipalHandle(PRINCIPAL_HANDLE_NONE)
+{}
+
+VideoFrame::~VideoFrame()
+{}
+
+void
+VideoFrame::SetNull() {
+  mImage = nullptr;
+  mIntrinsicSize = gfx::IntSize(0, 0);
+  mPrincipalHandle = PRINCIPAL_HANDLE_NONE;
+}
+
+void
+VideoFrame::TakeFrom(VideoFrame* aFrame)
+{
+  mImage = aFrame->mImage.forget();
+  mIntrinsicSize = aFrame->mIntrinsicSize;
+  mForceBlack = aFrame->GetForceBlack();
+  mPrincipalHandle = aFrame->mPrincipalHandle;
+}
+
+/* static */ already_AddRefed<Image>
+VideoFrame::CreateBlackImage(const gfx::IntSize& aSize)
+{
+  RefPtr<ImageContainer> container =
+    LayerManager::CreateImageContainer(ImageContainer::ASYNCHRONOUS);
+  RefPtr<PlanarYCbCrImage> image = container->CreatePlanarYCbCrImage();
+  if (!image) {
+    MOZ_ASSERT(false);
+    return nullptr;
+  }
+
+  int len = ((aSize.width * aSize.height) * 3 / 2);
+
+  // Generate a black image.
+  auto frame = MakeUnique<uint8_t[]>(len);
+  int y = aSize.width * aSize.height;
+  // Fill Y plane.
+  memset(frame.get(), 0x10, y);
+  // Fill Cb/Cr planes.
+  memset(frame.get() + y, 0x80, (len - y));
+
+  const uint8_t lumaBpp = 8;
+  const uint8_t chromaBpp = 4;
+
+  layers::PlanarYCbCrData data;
+  data.mYChannel = frame.get();
+  data.mYSize = gfx::IntSize(aSize.width, aSize.height);
+  data.mYStride = (int32_t) (aSize.width * lumaBpp / 8.0);
+  data.mCbCrStride = (int32_t) (aSize.width * chromaBpp / 8.0);
+  data.mCbChannel = frame.get() + aSize.height * data.mYStride;
+  data.mCrChannel = data.mCbChannel + aSize.height * data.mCbCrStride / 2;
+  data.mCbCrSize = gfx::IntSize(aSize.width / 2, aSize.height / 2);
+  data.mPicX = 0;
+  data.mPicY = 0;
+  data.mPicSize = gfx::IntSize(aSize.width, aSize.height);
+  data.mStereoMode = StereoMode::MONO;
+
+  // Copies data, so we can free data.
+  if (!image->CopyData(data)) {
+    MOZ_ASSERT(false);
+    return nullptr;
+  }
+
+  return image.forget();
+}
+
+VideoChunk::VideoChunk()
+{}
+
+VideoChunk::~VideoChunk()
+{}
+
+void
+VideoSegment::AppendFrame(already_AddRefed<Image>&& aImage,
+                          StreamTime aDuration,
+                          const IntSize& aIntrinsicSize,
+                          const PrincipalHandle& aPrincipalHandle,
+                          bool aForceBlack,
+                          TimeStamp aTimeStamp)
+{
+  VideoChunk* chunk = AppendChunk(aDuration);
+  chunk->mTimeStamp = aTimeStamp;
+  VideoFrame frame(aImage, aIntrinsicSize);
+  frame.SetForceBlack(aForceBlack);
+  frame.SetPrincipalHandle(aPrincipalHandle);
+  chunk->mFrame.TakeFrom(&frame);
+}
+
+VideoSegment::VideoSegment()
+  : MediaSegmentBase<VideoSegment, VideoChunk>(VIDEO)
+{}
+
+VideoSegment::~VideoSegment()
+{}
+
+} // namespace mozilla