Lock the decoder device (Angle) device from the decoder thread before copying the decoded frame to …

content/common/gpu/media/dxva_video_decode_accelerator.h

Index: content/common/gpu/media/dxva_video_decode_accelerator.h
diff --git a/content/common/gpu/media/dxva_video_decode_accelerator.h b/content/common/gpu/media/dxva_video_decode_accelerator.h
index 706e2dc92d05abfdfedb9fd2c45b983137b6ddea..d8e58ba5cbfdee5c555d80cbf59e2c2fd0b2f2cd 100644
--- a/content/common/gpu/media/dxva_video_decode_accelerator.h
+++ b/content/common/gpu/media/dxva_video_decode_accelerator.h
@@ -19,6 +19,7 @@
 #include <vector>
 
 #include "base/compiler_specific.h"
+#include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/lock.h"
@@ -241,6 +242,9 @@ class CONTENT_EXPORT DXVAVideoDecodeAccelerator
   // Returns true on success.
   bool GetVideoFrameDimensions(IMFSample* sample, int* width, int* height);
 
+  // Performs any cleanup on the decoder thread and stops it.
+  void StopDecoderThread();
+
   // To expose client callbacks from VideoDecodeAccelerator.
   media::VideoDecodeAccelerator::Client* client_;
 
@@ -256,6 +260,7 @@ class CONTENT_EXPORT DXVAVideoDecodeAccelerator
   base::win::ScopedComPtr<ID3D11Device > d3d11_device_;
   base::win::ScopedComPtr<IMFDXGIDeviceManager> d3d11_device_manager_;
   base::win::ScopedComPtr<ID3D11Query> d3d11_query_;
+  base::win::ScopedComPtr<ID3D10Multithread> multi_threaded_;
 
   // Ideally the reset token would be a stack variable which is used while
   // creating the device manager. However it seems that the device manager
@@ -368,6 +373,12 @@ class CONTENT_EXPORT DXVAVideoDecodeAccelerator
 
   // Function pointer for the MFCreateDXGIDeviceManager API.
   static CreateDXGIDeviceManager create_dxgi_device_manager_;
+
+  // Set to true if the DX11 device has been locked. This member is only
+  // accessed on the decoder thread.
+  bool dx11_device_locked_;
+
+  DISALLOW_COPY_AND_ASSIGN(DXVAVideoDecodeAccelerator);
 };
 
 }  // namespace content