Copy NV12 picture buffers on demand on the main thread.

media/gpu/dxva_video_decode_accelerator_win.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_GPU_DXVA_VIDEO_DECODE_ACCELERATOR_WIN_H_
 #define MEDIA_GPU_DXVA_VIDEO_DECODE_ACCELERATOR_WIN_H_
 
 #include <d3d11_1.h>
 #include <d3d9.h>
 #include <initguid.h>
@@ skipping 126 matching lines @@
 
   static VideoDecodeAccelerator::SupportedProfiles GetSupportedProfiles(
       const gpu::GpuPreferences& gpu_preferences,
       const gpu::GpuDriverBugWorkarounds& workarounds);
 
   // Preload dlls required for decoding.
   static void PreSandboxInitialization();
 
  private:
   friend class DXVAPictureBuffer;
+  friend class EGLStreamDelayedCopyPictureBuffer;
   friend class EGLStreamCopyPictureBuffer;
   friend class EGLStreamPictureBuffer;
   friend class PbufferPictureBuffer;
   typedef void* EGLConfig;
   typedef void* EGLSurface;
   typedef std::list<base::win::ScopedComPtr<IMFSample>> PendingInputs;
 
+  enum class PictureBufferMechanism {
+    // Copy to either a BGRA8 or FP16 texture using the video processor.
+    COPY_TO_RGB,
+
+    // Copy to another NV12 texture that can be used in ANGLE.
+    COPY_TO_NV12,
+
+    // Bind the resulting GLImage to the NV12 texture. If the texture's used
+    // in a an overlay than use it directly, otherwise copy it to another NV12
+    // texture when necessary.
+    DELAYED_COPY_TO_NV12,
+
+    // Bind the NV12 decoder texture directly to the texture used in ANGLE.
+    BIND
+  };
+
   // Returns the minimum resolution for the |profile| passed in.
   static std::pair<int, int> GetMinResolution(const VideoCodecProfile profile);
 
   // Returns the maximum resolution for the |profile| passed in.
   static std::pair<int, int> GetMaxResolution(const VideoCodecProfile profile);
 
   // Returns the maximum resolution for H264 video.
   static std::pair<int, int> GetMaxH264Resolution();
 
   // Certain AMD GPU drivers like R600, R700, Evergreen and Cayman and
@@ skipping 204 matching lines @@
   // The |config_changed| parameter is set to true if we detect a change in the
   // stream.
   HRESULT CheckConfigChanged(IMFSample* sample, bool* config_changed);
 
   // Called when we detect a stream configuration change. We reinitialize the
   // decoder here.
   void ConfigChanged(const Config& config);
 
   uint32_t GetTextureTarget() const;
 
+  PictureBufferMechanism GetPictureBufferMechanism() const;
+  bool ShouldUseANGLEDevice() const;
   ID3D11Device* D3D11Device() const;
 
   // To expose client callbacks from VideoDecodeAccelerator.
   VideoDecodeAccelerator::Client* client_;
 
   base::win::ScopedComPtr<IMFTransform> decoder_;
 
   base::win::ScopedComPtr<IDirect3D9Ex> d3d9_;
   base::win::ScopedComPtr<IDirect3DDevice9Ex> d3d9_device_ex_;
   base::win::ScopedComPtr<IDirect3DDeviceManager9> device_manager_;
@@ skipping 122 matching lines @@
   // attain a WeakPtr.
   base::WeakPtr<DXVAVideoDecodeAccelerator> weak_ptr_;
 
   // Set to true if we are in the context of a Flush operation. Used to prevent
   // multiple flush done notifications being sent out.
   bool pending_flush_;
 
   // Use CODECAPI_AVLowLatencyMode.
   bool enable_low_latency_;
 
-  bool share_nv12_textures_;
+  // Supports sharing the decoded NV12 textures with ANGLE
+  bool support_share_nv12_textures_;
 
-  // Copy NV12 texture to another NV12 texture.
-  bool copy_nv12_textures_;
+  // Supports copying the NV12 texture to another NV12 texture to use in
+  // ANGLE.
+  bool support_copy_nv12_textures_;
 
   // Copy video to FP16 scRGB textures.
   bool use_fp16_ = false;
 
   // When converting YUV to RGB, make sure we tell the blitter about the input
   // color space so that it can convert it correctly.
   bool use_color_info_ = true;
 
   // Defaults to false. Indicates if we should use D3D or DX11 interfaces for
   // H/W decoding.
@@ skipping 33 matching lines @@
 
   // Function pointer for the MFCreateDXGIDeviceManager API.
   static CreateDXGIDeviceManager create_dxgi_device_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(DXVAVideoDecodeAccelerator);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_DXVA_VIDEO_DECODE_ACCELERATOR_WIN_H_