转过头再找个复杂的播放程序验证一下，还是用我比较熟悉的MediaSDK的播放程序。基本思路就是

1. 在初始化解码输出显示的窗口的时候同时也初始化一个vulkan显示的窗口
2. 初始化d3d11设备的时候初始化vulkan, 同时多创建一个D3D11Texture2D的共享纹理
3. 最后在MSDK每个frame在解码结束，把视频帧输出到DXGI的back buffer的同时，也把视频帧用VideoProcessorBlt()的方法更新进共享纹理里去
4. 通过以上3步，应该那个vulkan的窗口里的纹理也会正常显示出我的解码图像了

实现的时候基本难度不大，有了前面共享opengl和opencl的经验，很快就集成好了。集成的过程里有2个坑：

• 在集成的时候，发现在sample_decode的程序里创建的D3D11Texture2D的属性MiscFlags如果有D3D11_RESOURCE_MISC_SHARED_KEYMUTEX则这个Texture2D对象创建失败，CreateTexture2D()返回E_INVALIDARG；但是如果MiscFlags的属性是 D3D11_RESOURCE_MISC_SHARED则没有问题。同时前一篇文章里基于vulkan tutorial的测试代码则没有问题。

    hres = CreateDXGIFactory(__uuidof(IDXGIFactory2), (void**)(&m_pDXGIFactory));if (FAILED(hres))return MFX_ERR_DEVICE_FAILED;hres = m_pDXGIFactory->EnumAdapters(nAdapterNum,&m_pAdapter);if (FAILED(hres))return MFX_ERR_DEVICE_FAILED;hres =  D3D11CreateDevice(m_pAdapter ,D3D_DRIVER_TYPE_UNKNOWN,NULL,0,FeatureLevels,MSDK_ARRAY_LEN(FeatureLevels),D3D11_SDK_VERSION,&m_pD3D11Device,&pFeatureLevelsOut,&m_pD3D11Ctx);if (FAILED(hres))return MFX_ERR_DEVICE_FAILED;#if 1CD3D11_TEXTURE2D_DESC TextureDesc2(DXGI_FORMAT_R8G8B8A8_UNORM, SHARED_TEXTURE_WIDTH, SHARED_TEXTURE_HEIGHT, 1, 1);TextureDesc2.BindFlags = D3D11_BIND_RENDER_TARGET;//当MiscFlags有D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX时TextureDesc2.MiscFlags = D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX | D3D11_RESOURCE_MISC_SHARED_NTHANDLE;hres = m_pD3D11Device->CreateTexture2D(&TextureDesc2, 0, &Shared_Texture);//这里hres返回E_INVALIDARGif (FAILED(hres))return MFX_ERR_DEVICE_FAILED;
#endif

经过反复比对，最终定位到了这个函数，MediaSDK sample_decode调用的是

hres = CreateDXGIFactory(__uuidof(IDXGIFactory2), (void**)(&m_pDXGIFactory) );

vulkan tutorial调用的是

VERIFY(SUCCEEDED(CreateDXGIFactory2(0, IID_PPV_ARGS(&DxgiFactory))));

上网搜索了一下，在这里找到了答案

CreateDXGIFactory was the original DXGI 1.0 factory function for Direct3D 10. For Direct3D 11, you should always use CreateDXGIFactory1 and create a IDXGIFactory1 or later interface.

最后验证一下，把原来代码里的 hres = CreateDXGIFactory(__uuidof(IDXGIFactory2), (void**)(&m_pDXGIFactory) );

改成hres = CreateDXGIFactory1(__uuidof(IDXGIFactory2), (void**)(&m_pDXGIFactory) );

下面的CreateTexture2D()就返回S_OK了

• 代码编译过去以后在链接的时候报错，报一些标准库函数找不到

查了一下，主要原因是MediaSDK的sample_decode/sample_common工程的编译参数里Runtime Library设置的是Multi-threaded. 而link的GLFW库我在编译的时候用的是默认设置，Runtime Library用的是Multi-threaded DLL设置，所以把GLFW项目设置成Multi-threaded, 重新编译一遍就链接成功了

Windows specific CMake options USE_MSVC_RUNTIME_LIBRARY_DLL determines whether to use the DLL version or the static library version of the Visual C++ runtime library. When enabled, the DLL version of the Visual C++ library is used. This is enabled by default. On CMake 3.15 and later you can set the standard CMake CMAKE_MSVC_RUNTIME_LIBRARY variable instead of this GLFW-specific option.

最后运行一下编译出的代码，

 一切正常，收工 :)

最后按照惯例，源码奉上，仅供参考

Intel_mediasdk2021_sample_decode_with_vulkan_sharing: MSDK 2021 解码例程，用来演示D3D11 texture2D和vulkan vkImage共享buffer