import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/layers/GPUVideoImage.h

@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 20; 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/. */
+
+#ifndef GFX_GPU_VIDEO_IMAGE_H
+#define GFX_GPU_VIDEO_IMAGE_H
+
+#include "mozilla/RefPtr.h"
+#include "ImageContainer.h"
+#include "mozilla/layers/GPUVideoTextureClient.h"
+#include "mozilla/layers/CompositableClient.h"
+#include "mozilla/layers/ImageBridgeChild.h"
+
+namespace mozilla {
+namespace dom {
+class VideoDecoderManagerChild;
+}
+namespace layers {
+
+// Image class that refers to a decoded video frame within
+// the GPU process.
+class GPUVideoImage final : public Image {
+public:
+  GPUVideoImage(dom::VideoDecoderManagerChild* aManager,
+                const SurfaceDescriptorGPUVideo& aSD,
+                const gfx::IntSize& aSize)
+    : Image(nullptr, ImageFormat::GPU_VIDEO)
+    , mSize(aSize)
+  {
+    // Create the TextureClient immediately since the GPUVideoTextureData
+    // is responsible for deallocating the SurfaceDescriptor.
+    //
+    // Use the RECYCLE texture flag, since it's likely that our 'real'
+    // TextureData (in the decoder thread of the GPU process) is using
+    // it too, and we want to make sure we don't send the delete message
+    // until we've stopped being used on the compositor.
+    mTextureClient =
+      TextureClient::CreateWithData(new GPUVideoTextureData(aManager, aSD, aSize),
+                                    TextureFlags::RECYCLE,
+                                    ImageBridgeChild::GetSingleton().get());
+  }
+
+  ~GPUVideoImage() override {}
+
+  gfx::IntSize GetSize() override { return mSize; }
+
+  virtual already_AddRefed<gfx::SourceSurface> GetAsSourceSurface() override
+  {
+    if (!mTextureClient) {
+      return nullptr;
+    }
+    GPUVideoTextureData* data = mTextureClient->GetInternalData()->AsGPUVideoTextureData();
+    return data->GetAsSourceSurface();
+  }
+
+  virtual TextureClient* GetTextureClient(KnowsCompositor* aForwarder) override
+  {
+    MOZ_ASSERT(aForwarder == ImageBridgeChild::GetSingleton(), "Must only use GPUVideo on ImageBridge");
+    return mTextureClient;
+  }
+
+private:
+  gfx::IntSize mSize;
+  RefPtr<TextureClient> mTextureClient;
+};
+
+} // namepace layers
+} // namespace mozilla
+
+#endif // GFX_GPU_VIDEO_IMAGE_H