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libs/hwcodec/externals/nvEncDXGIOutputDuplicationSample/Preproc.h

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+/*
+ * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  * Neither the name of NVIDIA CORPORATION nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+#include <dxgi1_2.h>
+#include <d3d11_2.h>
+#include <unordered_map>
+using namespace std;
+
+class RGBToNV12
+{
+    /// Simple Preprocessor class
+    /// Uses DXVAHD VideoProcessBlt to perform colorspace conversion
+private:
+    /// D3D11 device to be used for Processing
+    ID3D11Device *m_pDev = nullptr;
+    /// D3D11 device context to be used for Processing
+    ID3D11DeviceContext* m_pCtx = nullptr;
+    /// D3D11 video device to be used for Processing, obtained from d3d11 device
+    ID3D11VideoDevice* m_pVid = nullptr;
+    /// D3D11 video device context to be used for Processing, obtained from d3d11 device
+    ID3D11VideoContext* m_pVidCtx = nullptr;
+    /// DXVAHD video processor configured for processing.
+    /// Needs to be reconfigured based on input and output textures for each Convert() call
+    ID3D11VideoProcessor* m_pVP = nullptr;
+    /// DXVAHD VpBlt output target. Obtained from the output texture passed to Convert()
+    ID3D11VideoProcessorOutputView* m_pVPOut = nullptr;
+    /// D3D11 video processor enumerator. Required to configure Video processor streams
+    ID3D11VideoProcessorEnumerator* m_pVPEnum = nullptr;
+    /// Mapping of Texture2D handle and corresponding Video Processor output view handle
+    /// Optimization to avoid having to create video processor output views in each Convert() call
+    std::unordered_map<ID3D11Texture2D*, ID3D11VideoProcessorOutputView*> viewMap;
+    /// Input and Output Texture2D properties.
+    /// Required to optimize Video Processor stream usage
+    D3D11_TEXTURE2D_DESC m_inDesc = { 0 };
+    D3D11_TEXTURE2D_DESC m_outDesc = { 0 };
+private:
+    /// Default Constructor
+    RGBToNV12() 
+    {
+    }
+
+public:
+    /// Initialize Video Context
+    HRESULT Init();
+    /// Perform Colorspace conversion
+    HRESULT Convert(ID3D11Texture2D* pRGB, ID3D11Texture2D*pYUV);
+    /// Release all resources
+    void Cleanup();
+
+public:
+    /// Constructor
+    RGBToNV12(ID3D11Device *pDev, ID3D11DeviceContext *pCtx);
+    /// Destructor. Release all resources before destroying object
+    ~RGBToNV12() 
+    {
+        Cleanup(); 
+    }
+
+};
+
+