为什么在使用 CopyResource 跨 ID3D11Devices 共享纹理时会出现视频内存泄漏？

问题描述

• 我创建了两个设备 A 和 B，其中 A 是生产者，B 是消费者。纹理在两者之间通过 D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX 共享。现在我发现每次B调用copyResource将共享纹理复制到本地时，显存会不断增加。这个问题困扰了我很久。我搜索了github或其他代码源，但找不到解决方案。我的机器是Win10和Geforce GTX 1060。

• 重现问题最精简的代码如下：

   #include <dxgi.h>
   #include <d3d11.h>
   #include <atlbase.h>
   #pragma comment(lib,"D3D11.lib")
  
   #define RETURN_ON_FAIL(hr)    if(Failed(hr)) return hr;
  
   namespace SharedTextureLeakTest
   {
   const UINT32 texture_width = 320;
   const UINT32 texture_height = 240;
  
   ATL::CComPtr<ID3D11Device>          device_1 = nullptr;
   ATL::CComPtr<ID3D11DeviceContext>   context_1 = nullptr;
   ATL::CComPtr<ID3D11Device>          device_2 = nullptr;
   ATL::CComPtr<ID3D11DeviceContext>   context_2 = nullptr;
   ATL::CComPtr<ID3D11Texture2D>       shared_texture_dev1 = nullptr;  //owner by device1
   ATL::CComPtr<ID3D11Texture2D>       dst_texture_dev2 = nullptr; //owner by device2
   HANDLE  shared_handle = nullptr;
  
   HRESULT CheckEnvironmentValid()
   {
       HRESULT hr = S_OK;
  
       //Create Device1
       if (!device_1)
       {
           D3D_FEATURE_LEVEL pFeatureLevel;
           UINT Flags = D3D11_CREATE_DEVICE_DEBUG;
           hr = ::D3D11CreateDevice(nullptr,D3D_DRIVER_TYPE_HARDWARE,nullptr,Flags,D3D11_SDK_VERSION,&device_1,&pFeatureLevel,&context_1);
           if (Failed(hr)) 
           {
               device_1 = nullptr;
               return hr;
           }
       }
  
       //Create Shared Texture
       if (!shared_texture_dev1)
       {
           D3D11_TEXTURE2D_DESC desc;
           desc.ArraySize = 1;
           desc.BindFlags = D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE;
           desc.cpuAccessFlags = 0;
           desc.Format = dxgi_FORMAT_B8G8R8A8_UnorM;
           desc.Width = texture_width;
           desc.Height = texture_height;
           desc.MipLevels = 1;
           desc.Usage = D3D11_USAGE_DEFAULT;
           desc.MiscFlags = D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX;
           desc.SampleDesc.Count = 1;
           desc.SampleDesc.Quality = 0;
  
           hr = device_1->CreateTexture2D(&desc,&shared_texture_dev1);
           RETURN_ON_FAIL(hr);
       }
  
       //Get Handle of Shared Texture
       if (!shared_handle)
       {
           ATL::CComPtr<IdxgiResource> dxgi_res;
           hr = shared_texture_dev1->QueryInterface(__uuidof(IdxgiResource),(void**)&dxgi_res);
           RETURN_ON_FAIL(hr);
  
           hr = dxgi_res->GetSharedHandle(&shared_handle);
           RETURN_ON_FAIL(hr);
       }
  
       //Create Device2
       if (!device_2)
       {
           D3D_FEATURE_LEVEL pFeatureLevel;
           UINT Flags = D3D11_CREATE_DEVICE_DEBUG;
           hr = ::D3D11CreateDevice(nullptr,&device_2,&context_2);
           if (Failed(hr))
           {
               device_2= nullptr;
               return hr;
           }
       }
  
       //Create Dst Texture
       if (!dst_texture_dev2)
       {
           D3D11_TEXTURE2D_DESC desc;
           desc.ArraySize = 1;
           desc.BindFlags = D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE;
           desc.cpuAccessFlags = 0;
           desc.Format = dxgi_FORMAT_B8G8R8A8_UnorM;
           desc.Width = texture_width;
           desc.Height = texture_height;
           desc.MipLevels = 1;
           desc.Usage = D3D11_USAGE_DEFAULT;
           desc.MiscFlags = 0;
           desc.SampleDesc.Count = 1;
           desc.SampleDesc.Quality = 0;
  
           hr = device_2->CreateTexture2D(&desc,&dst_texture_dev2);
           RETURN_ON_FAIL(hr);
       }
  
       return hr;
   }
  
   HRESULT LoopOncetest()
   {
       HRESULT hr = CheckEnvironmentValid();
       RETURN_ON_FAIL(hr);
  
       //Open Shared Texture
       ATL::CComPtr<ID3D11Texture2D>   shared_texture_dev2;
       hr = device_2->OpenSharedResource(shared_handle,IID_PPV_ARGS(&shared_texture_dev2));
       RETURN_ON_FAIL(hr);
  
       //copy
       do
       {
           CComPtr<IdxgiKeyedMutex> km;
           hr = shared_texture_dev2->QueryInterface(__uuidof(IdxgiKeyedMutex),(void**)&km);
           RETURN_ON_FAIL(hr);
  
           INT64 release_key = 0;
           hr = km->AcquireSync(0,10);
           RETURN_ON_FAIL(hr);
  
           if (hr == WAIT_OBJECT_0)
           {
               context_2->copyResource(dst_texture_dev2,shared_texture_dev2);
           //  context_2->Flush();
           }
  
           hr = km->ReleaseSync(0);
           RETURN_ON_FAIL(hr);
  
       } while (FALSE);
  
       return hr;
   }
   }
  
   void Dotest()
   {
       for(;;)
       {
            SharedTextureLeakTest::LoopOncetest();
            Sleep(1000);
       }
   }
  

解决方法

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