forked from mirrors/gecko-dev
efe35b01d5
In this patch, we ask the media engine to return a handle for shareable dcomp surface, which will then be packaged into a new texture data type and being shared with the GPU process via the video bridge. DcompSurfaceImage is the image which contains the handle texture data, which doesn't support being accessed in the content process. When the compositor uploads the image to the GPU process, the corresponding texture host will be created. The render texture host will be created by that texture host, and it will be used in DCLayerTree. In DCLayerTree, we create a new type of surface for our dcomp handle. DCSurfaceHandle will ask the render texture host to reconstruct the surface by the handle shared from the remote process (the handle is actually duplicated to the parent process first due to the sandbox policy, and then be duplicated to the GPU process later) DCSurfaceHandle will attach that surface to its visual in order to display the video frame directly. In the whole process, it's not possible for Gecko to access any decoded video data which is protected by the media engine itself. Depends on D149941 Differential Revision: https://phabricator.services.mozilla.com/D151019
71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_GFX_RENDERTEXTUREHOSTWRAPPER_H
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#define MOZILLA_GFX_RENDERTEXTUREHOSTWRAPPER_H
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#include "RenderTextureHostSWGL.h"
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namespace mozilla {
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namespace wr {
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/**
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* RenderTextureHost of GPUVideoTextureHost.
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*
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* GPUVideoTextureHost wraps TextureHost. This class wraps RenderTextureHost of
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* the wrapped TextureHost. Lifetime of the wrapped TextureHost is usually
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* longer than GPUVideoTextureHost and the wrapped TextureHost is used by
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* multiple GPUVideoTextureHosts. This class is used to reduce recreations of
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* the wrappded RenderTextureHost. Initializations of some
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* RenderTextureHosts(RenderDXGITextureHost and
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* RenderDXGIYCbCrTextureHost) have overhead.
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*/
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class RenderTextureHostWrapper final : public RenderTextureHostSWGL {
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public:
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explicit RenderTextureHostWrapper(ExternalImageId aExternalImageId);
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// RenderTextureHost
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wr::WrExternalImage Lock(uint8_t aChannelIndex, gl::GLContext* aGL,
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wr::ImageRendering aRendering) override;
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void Unlock() override;
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void ClearCachedResources() override;
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void PrepareForUse() override;
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void NotifyForUse() override;
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void NotifyNotUsed() override;
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bool SyncObjectNeeded() override;
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RenderMacIOSurfaceTextureHost* AsRenderMacIOSurfaceTextureHost() override;
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RenderDXGITextureHost* AsRenderDXGITextureHost() override;
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RenderDXGIYCbCrTextureHost* AsRenderDXGIYCbCrTextureHost() override;
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RenderDcompSurfaceTextureHost* AsRenderDcompSurfaceTextureHost() override;
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// RenderTextureHostSWGL
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size_t GetPlaneCount() const override;
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gfx::SurfaceFormat GetFormat() const override;
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gfx::ColorDepth GetColorDepth() const override;
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gfx::YUVRangedColorSpace GetYUVColorSpace() const override;
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bool MapPlane(RenderCompositor* aCompositor, uint8_t aChannelIndex,
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PlaneInfo& aPlaneInfo) override;
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void UnmapPlanes() override;
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// This is just a wrapper, so doesn't need to report the
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// size of the wrapped object (which reports itself).
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size_t Bytes() override { return 0; }
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private:
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~RenderTextureHostWrapper() override;
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void EnsureTextureHost() const;
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RenderTextureHostSWGL* EnsureRenderTextureHostSWGL() const;
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const ExternalImageId mExternalImageId;
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mutable RefPtr<RenderTextureHost> mTextureHost;
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};
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} // namespace wr
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} // namespace mozilla
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#endif // MOZILLA_GFX_RENDERTEXTUREHOSTWRAPPER_H
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