text: // 
  // Notice Regarding Standards.  AMD does not provide a license or sublicense to
  // any Intellectual Property Rights relating to any standards, including but not
  // limited to any audio and/or video codec technologies such as MPEG-2, MPEG-4;
  // AVC/H.264; HEVC/H.265; AAC decode/FFMPEG; AAC encode/FFMPEG; VC-1; and MP3
  // (collectively, the "Media Technologies"). For clarity, you will pay any
  // royalties due for such third party technologies, which may include the Media
  // Technologies that are owed as a result of AMD providing the Software to you.
  // 
  // MIT license 
  // 
  // Copyright (c) 2018 Advanced Micro Devices, Inc. All rights reserved.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  //
  
  #ifndef AMF_Context_h
  #define AMF_Context_h
  #pragma once
  
  #include "Buffer.h"
  #include "AudioBuffer.h"
  #include "Surface.h"
  #include "Compute.h"
  #include "ComputeFactory.h"
  
  #if defined(__cplusplus)
  namespace amf
  {
  #endif
      //----------------------------------------------------------------------------------------------
      // AMFContext interface
      //----------------------------------------------------------------------------------------------
  #if defined(__cplusplus)
      class AMF_NO_VTABLE AMFContext : public AMFPropertyStorage
      {
      public:
          AMF_DECLARE_IID(0xa76a13f0, 0xd80e, 0x4fcc, 0xb5, 0x8, 0x65, 0xd0, 0xb5, 0x2e, 0xd9, 0xee)
          
          // Cleanup
          virtual AMF_RESULT          AMF_STD_CALL Terminate() = 0;
  
          // DX9
          virtual AMF_RESULT          AMF_STD_CALL InitDX9(void* pDX9Device) = 0;
          virtual void*               AMF_STD_CALL GetDX9Device(AMF_DX_VERSION dxVersionRequired = AMF_DX9) = 0;
          virtual AMF_RESULT          AMF_STD_CALL LockDX9() = 0;
          virtual AMF_RESULT          AMF_STD_CALL UnlockDX9() = 0;
          class AMFDX9Locker;
  
          // DX11
          virtual AMF_RESULT          AMF_STD_CALL InitDX11(void* pDX11Device, AMF_DX_VERSION dxVersionRequired = AMF_DX11_0) = 0;
          virtual void*               AMF_STD_CALL GetDX11Device(AMF_DX_VERSION dxVersionRequired = AMF_DX11_0) = 0;
          virtual AMF_RESULT          AMF_STD_CALL LockDX11() = 0;
          virtual AMF_RESULT          AMF_STD_CALL UnlockDX11() = 0;
          class AMFDX11Locker;
  
          // OpenCL
          virtual AMF_RESULT          AMF_STD_CALL InitOpenCL(void* pCommandQueue = NULL) = 0;
          virtual void*               AMF_STD_CALL GetOpenCLContext() = 0;
          virtual void*               AMF_STD_CALL GetOpenCLCommandQueue() = 0;
          virtual void*               AMF_STD_CALL GetOpenCLDeviceID() = 0;
          virtual AMF_RESULT          AMF_STD_CALL GetOpenCLComputeFactory(AMFComputeFactory **ppFactory) = 0; // advanced compute - multiple queries
          virtual AMF_RESULT          AMF_STD_CALL InitOpenCLEx(AMFComputeDevice *pDevice) = 0;
          virtual AMF_RESULT          AMF_STD_CALL LockOpenCL() = 0;
          virtual AMF_RESULT          AMF_STD_CALL UnlockOpenCL() = 0;
          class AMFOpenCLLocker;
  
          // OpenGL
          virtual AMF_RESULT          AMF_STD_CALL InitOpenGL(amf_handle hOpenGLContext, amf_handle hWindow, amf_handle hDC) = 0;
          virtual amf_handle          AMF_STD_CALL GetOpenGLContext() = 0;
          virtual amf_handle          AMF_STD_CALL GetOpenGLDrawable() = 0;
          virtual AMF_RESULT          AMF_STD_CALL LockOpenGL() = 0;
          virtual AMF_RESULT          AMF_STD_CALL UnlockOpenGL() = 0;
          class AMFOpenGLLocker;
  
          // XV - Linux
          virtual AMF_RESULT          AMF_STD_CALL InitXV(void* pXVDevice) = 0;
          virtual void*               AMF_STD_CALL GetXVDevice() = 0;
          virtual AMF_RESULT          AMF_STD_CALL LockXV() = 0;
          virtual AMF_RESULT          AMF_STD_CALL UnlockXV() = 0;
          class AMFXVLocker;
  
          // Gralloc - Android
          virtual AMF_RESULT          AMF_STD_CALL InitGralloc(void* pGrallocDevice) = 0;
          virtual void*               AMF_STD_CALL GetGrallocDevice() = 0;
          virtual AMF_RESULT          AMF_STD_CALL LockGralloc() = 0;
          virtual AMF_RESULT          AMF_STD_CALL UnlockGralloc() = 0;
          class AMFGrallocLocker;
  
          // Allocation
          virtual AMF_RESULT          AMF_STD_CALL AllocBuffer(AMF_MEMORY_TYPE type, amf_size size, AMFBuffer** ppBuffer) = 0;
          virtual AMF_RESULT          AMF_STD_CALL AllocSurface(AMF_MEMORY_TYPE type, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, AMFSurface** ppSurface) = 0;
          virtual AMF_RESULT          AMF_STD_CALL AllocAudioBuffer(AMF_MEMORY_TYPE type, AMF_AUDIO_FORMAT format, amf_int32 samples, amf_int32 sampleRate, amf_int32 channels, 
                                                      AMFAudioBuffer** ppAudioBuffer) = 0;
  
          // Wrap existing objects
          virtual AMF_RESULT          AMF_STD_CALL CreateBufferFromHostNative(void* pHostBuffer, amf_size size, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateSurfaceFromHostNative(AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, amf_int32 hPitch, amf_int32 vPitch, void* pData, 
                                                       AMFSurface** ppSurface, AMFSurfaceObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateSurfaceFromDX9Native(void* pDX9Surface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateSurfaceFromDX11Native(void* pDX11Surface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateSurfaceFromOpenGLNative(AMF_SURFACE_FORMAT format, amf_handle hGLTextureID, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateSurfaceFromGrallocNative(amf_handle hGrallocSurface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateSurfaceFromOpenCLNative(AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, void** pClPlanes, 
                                                       AMFSurface** ppSurface, AMFSurfaceObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateBufferFromOpenCLNative(void* pCLBuffer, amf_size size, AMFBuffer** ppBuffer) = 0;
  
          // Access to AMFCompute interface - AMF_MEMORY_OPENCL, AMF_MEMORY_COMPUTE_FOR_DX9, AMF_MEMORY_COMPUTE_FOR_DX11 are currently supported
          virtual AMF_RESULT          AMF_STD_CALL GetCompute(AMF_MEMORY_TYPE eMemType, AMFCompute** ppCompute) = 0;
      };
  
      //----------------------------------------------------------------------------------------------
      // smart pointer
      //----------------------------------------------------------------------------------------------
      typedef AMFInterfacePtr_T<AMFContext> AMFContextPtr;
  
      //----------------------------------------------------------------------------------------------
      // AMFContext1 interface
      //----------------------------------------------------------------------------------------------
  
      class AMF_NO_VTABLE AMFContext1 : public AMFContext
      {
      public:
          AMF_DECLARE_IID(0xd9e9f868, 0x6220, 0x44c6, 0xa2, 0x2f, 0x7c, 0xd6, 0xda, 0xc6, 0x86, 0x46)
  
          virtual AMF_RESULT          AMF_STD_CALL CreateBufferFromDX11Native(void* pHostBuffer, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver) = 0;
  
          virtual AMF_RESULT          AMF_STD_CALL AllocBufferEx(AMF_MEMORY_TYPE type, amf_size size, AMF_BUFFER_USAGE usage, AMF_MEMORY_CPU_ACCESS access, AMFBuffer** ppBuffer) = 0;
          virtual AMF_RESULT          AMF_STD_CALL AllocSurfaceEx(AMF_MEMORY_TYPE type, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, AMF_SURFACE_USAGE usage, AMF_MEMORY_CPU_ACCESS access, AMFSurface** ppSurface) = 0;
  
          // Vulkan - Windows, Linux
          virtual AMF_RESULT          AMF_STD_CALL InitVulkan(void* pVulkanDevice) = 0;
          virtual void*               AMF_STD_CALL GetVulkanDevice() = 0;
          virtual AMF_RESULT          AMF_STD_CALL LockVulkan() = 0;
          virtual AMF_RESULT          AMF_STD_CALL UnlockVulkan() = 0;
  
          virtual AMF_RESULT          AMF_STD_CALL CreateSurfaceFromVulkanNative(void* pVulkanImage, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateBufferFromVulkanNative(void* pVulkanBuffer, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL GetVulkanDeviceExtensions(amf_size *pCount, const char **ppExtensions) = 0;
  
          
          class AMFVulkanLocker;
      };
      //----------------------------------------------------------------------------------------------
      // smart pointer
      //----------------------------------------------------------------------------------------------
      typedef AMFInterfacePtr_T<AMFContext1> AMFContext1Ptr;
  
      class AMF_NO_VTABLE AMFContext2 : public AMFContext1
      {
      public:
          AMF_DECLARE_IID(0x726241d3, 0xbd46, 0x4e90, 0x99, 0x68, 0x93, 0xe0, 0x7e, 0xa2, 0x98, 0x4d)
  
          // DX12
          virtual AMF_RESULT          AMF_STD_CALL InitDX12(void* pDX11Device, AMF_DX_VERSION dxVersionRequired = AMF_DX12) = 0;
          virtual void*               AMF_STD_CALL GetDX12Device(AMF_DX_VERSION dxVersionRequired = AMF_DX12) = 0;
          virtual AMF_RESULT          AMF_STD_CALL LockDX12() = 0;
          virtual AMF_RESULT          AMF_STD_CALL UnlockDX12() = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateSurfaceFromDX12Native(void* pResourceTexture, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver) = 0;
          virtual AMF_RESULT          AMF_STD_CALL CreateBufferFromDX12Native(void* pResourceBuffer, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver) = 0;
  
          class AMFDX12Locker;
      };
      typedef AMFInterfacePtr_T<AMFContext2> AMFContext2Ptr;
  #else
      typedef struct AMFContext AMFContext;
      AMF_DECLARE_IID(AMFContext, 0xa76a13f0, 0xd80e, 0x4fcc, 0xb5, 0x8, 0x65, 0xd0, 0xb5, 0x2e, 0xd9, 0xee)
  
      typedef struct AMFContextVtbl
      {
          // AMFInterface interface
          amf_long            (AMF_STD_CALL *Acquire)(AMFContext* pThis);
          amf_long            (AMF_STD_CALL *Release)(AMFContext* pThis);
          enum AMF_RESULT     (AMF_STD_CALL *QueryInterface)(AMFContext* pThis, const struct AMFGuid *interfaceID, void** ppInterface);
          
          // AMFInterface AMFPropertyStorage
  
          AMF_RESULT          (AMF_STD_CALL *SetProperty)(AMFContext* pThis, const wchar_t* name, AMFVariantStruct value);
          AMF_RESULT          (AMF_STD_CALL *GetProperty)(AMFContext* pThis, const wchar_t* name, AMFVariantStruct* pValue);
          amf_bool            (AMF_STD_CALL *HasProperty)(AMFContext* pThis, const wchar_t* name);
          amf_size            (AMF_STD_CALL *GetPropertyCount)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *GetPropertyAt)(AMFContext* pThis, amf_size index, wchar_t* name, amf_size nameSize, AMFVariantStruct* pValue);
          AMF_RESULT          (AMF_STD_CALL *Clear)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *AddTo)(AMFContext* pThis, AMFPropertyStorage* pDest, amf_bool overwrite, amf_bool deep);
          AMF_RESULT          (AMF_STD_CALL *CopyTo)(AMFContext* pThis, AMFPropertyStorage* pDest, amf_bool deep);
          void                (AMF_STD_CALL *AddObserver)(AMFContext* pThis, AMFPropertyStorageObserver* pObserver);
          void                (AMF_STD_CALL *RemoveObserver)(AMFContext* pThis, AMFPropertyStorageObserver* pObserver);
  
          // AMFContext interface
         
          // Cleanup
          AMF_RESULT          (AMF_STD_CALL *Terminate)(AMFContext* pThis);
  
          // DX9
          AMF_RESULT          (AMF_STD_CALL *InitDX9)(AMFContext* pThis, void* pDX9Device);
          void*               (AMF_STD_CALL *GetDX9Device)(AMFContext* pThis, AMF_DX_VERSION dxVersionRequired);
          AMF_RESULT          (AMF_STD_CALL *LockDX9)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockDX9)(AMFContext* pThis);
          // DX11
          AMF_RESULT          (AMF_STD_CALL *InitDX11)(AMFContext* pThis, void* pDX11Device, AMF_DX_VERSION dxVersionRequired);
          void*               (AMF_STD_CALL *GetDX11Device)(AMFContext* pThis, AMF_DX_VERSION dxVersionRequired);
          AMF_RESULT          (AMF_STD_CALL *LockDX11)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockDX11)(AMFContext* pThis);
  
          // OpenCL
          AMF_RESULT          (AMF_STD_CALL *InitOpenCL)(AMFContext* pThis, void* pCommandQueue);
          void*               (AMF_STD_CALL *GetOpenCLContext)(AMFContext* pThis);
          void*               (AMF_STD_CALL *GetOpenCLCommandQueue)(AMFContext* pThis);
          void*               (AMF_STD_CALL *GetOpenCLDeviceID)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *GetOpenCLComputeFactory)(AMFContext* pThis, AMFComputeFactory **ppFactory); // advanced compute - multiple queries
          AMF_RESULT          (AMF_STD_CALL *InitOpenCLEx)(AMFContext* pThis, AMFComputeDevice *pDevice);
          AMF_RESULT          (AMF_STD_CALL *LockOpenCL)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockOpenCL)(AMFContext* pThis);
  
          // OpenGL
          AMF_RESULT          (AMF_STD_CALL *InitOpenGL)(AMFContext* pThis, amf_handle hOpenGLContext, amf_handle hWindow, amf_handle hDC);
          amf_handle          (AMF_STD_CALL *GetOpenGLContext)(AMFContext* pThis);
          amf_handle          (AMF_STD_CALL *GetOpenGLDrawable)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockOpenGL)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockOpenGL)(AMFContext* pThis);
          // XV - Linux
          AMF_RESULT          (AMF_STD_CALL *InitXV)(AMFContext* pThis, void* pXVDevice);
          void*               (AMF_STD_CALL *GetXVDevice)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockXV)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockXV)(AMFContext* pThis);
  
          // Gralloc - Android
          AMF_RESULT          (AMF_STD_CALL *InitGralloc)(AMFContext* pThis, void* pGrallocDevice);
          void*               (AMF_STD_CALL *GetGrallocDevice)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockGralloc)(AMFContext* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockGralloc)(AMFContext* pThis);
          // Allocation
          AMF_RESULT          (AMF_STD_CALL *AllocBuffer)(AMFContext* pThis, AMF_MEMORY_TYPE type, amf_size size, AMFBuffer** ppBuffer);
          AMF_RESULT          (AMF_STD_CALL *AllocSurface)(AMFContext* pThis, AMF_MEMORY_TYPE type, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, AMFSurface** ppSurface);
          AMF_RESULT          (AMF_STD_CALL *AllocAudioBuffer)(AMFContext* pThis, AMF_MEMORY_TYPE type, AMF_AUDIO_FORMAT format, amf_int32 samples, amf_int32 sampleRate, amf_int32 channels, 
                                                      AMFAudioBuffer** ppAudioBuffer);
  
          // Wrap existing objects
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromHostNative)(AMFContext* pThis, void* pHostBuffer, amf_size size, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromHostNative)(AMFContext* pThis, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, amf_int32 hPitch, amf_int32 vPitch, void* pData, 
                                                       AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromDX9Native)(AMFContext* pThis, void* pDX9Surface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromDX11Native)(AMFContext* pThis, void* pDX11Surface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromOpenGLNative)(AMFContext* pThis, AMF_SURFACE_FORMAT format, amf_handle hGLTextureID, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromGrallocNative)(AMFContext* pThis, amf_handle hGrallocSurface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromOpenCLNative)(AMFContext* pThis, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, void** pClPlanes, 
                                                       AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromOpenCLNative)(AMFContext* pThis, void* pCLBuffer, amf_size size, AMFBuffer** ppBuffer);
  
          // Access to AMFCompute interface - AMF_MEMORY_OPENCL, AMF_MEMORY_COMPUTE_FOR_DX9, AMF_MEMORY_COMPUTE_FOR_DX11 are currently supported
          AMF_RESULT          (AMF_STD_CALL *GetCompute)(AMFContext* pThis, AMF_MEMORY_TYPE eMemType, AMFCompute** ppCompute);
  
      } AMFContextVtbl;
  
      struct AMFContext
      {
          const AMFContextVtbl *pVtbl;
      };
  
  
      typedef struct AMFContext1 AMFContext1;
      AMF_DECLARE_IID(AMFContext1, 0xd9e9f868, 0x6220, 0x44c6, 0xa2, 0x2f, 0x7c, 0xd6, 0xda, 0xc6, 0x86, 0x46)
  
      typedef struct AMFContext1Vtbl
      {
          // AMFInterface interface
          amf_long            (AMF_STD_CALL *Acquire)(AMFContext1* pThis);
          amf_long            (AMF_STD_CALL *Release)(AMFContext1* pThis);
          enum AMF_RESULT     (AMF_STD_CALL *QueryInterface)(AMFContext1* pThis, const struct AMFGuid *interfaceID, void** ppInterface);
          
          // AMFInterface AMFPropertyStorage
  
          AMF_RESULT          (AMF_STD_CALL *SetProperty)(AMFContext1* pThis, const wchar_t* name, AMFVariantStruct value);
          AMF_RESULT          (AMF_STD_CALL *GetProperty)(AMFContext1* pThis, const wchar_t* name, AMFVariantStruct* pValue);
          amf_bool            (AMF_STD_CALL *HasProperty)(AMFContext1* pThis, const wchar_t* name);
          amf_size            (AMF_STD_CALL *GetPropertyCount)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *GetPropertyAt)(AMFContext1* pThis, amf_size index, wchar_t* name, amf_size nameSize, AMFVariantStruct* pValue);
          AMF_RESULT          (AMF_STD_CALL *Clear)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *AddTo)(AMFContext1* pThis, AMFPropertyStorage* pDest, amf_bool overwrite, amf_bool deep);
          AMF_RESULT          (AMF_STD_CALL *CopyTo)(AMFContext1* pThis, AMFPropertyStorage* pDest, amf_bool deep);
          void                (AMF_STD_CALL *AddObserver)(AMFContext1* pThis, AMFPropertyStorageObserver* pObserver);
          void                (AMF_STD_CALL *RemoveObserver)(AMFContext1* pThis, AMFPropertyStorageObserver* pObserver);
  
          // AMFContext interface
         
          // Cleanup
          AMF_RESULT          (AMF_STD_CALL *Terminate)(AMFContext1* pThis);
  
          // DX9
          AMF_RESULT          (AMF_STD_CALL *InitDX9)(AMFContext1* pThis, void* pDX9Device);
          void*               (AMF_STD_CALL *GetDX9Device)(AMFContext1* pThis, AMF_DX_VERSION dxVersionRequired);
          AMF_RESULT          (AMF_STD_CALL *LockDX9)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockDX9)(AMFContext1* pThis);
          // DX11
          AMF_RESULT          (AMF_STD_CALL *InitDX11)(AMFContext1* pThis, void* pDX11Device, AMF_DX_VERSION dxVersionRequired);
          void*               (AMF_STD_CALL *GetDX11Device)(AMFContext1* pThis, AMF_DX_VERSION dxVersionRequired);
          AMF_RESULT          (AMF_STD_CALL *LockDX11)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockDX11)(AMFContext1* pThis);
  
          // OpenCL
          AMF_RESULT          (AMF_STD_CALL *InitOpenCL)(AMFContext1* pThis, void* pCommandQueue);
          void*               (AMF_STD_CALL *GetOpenCLContext)(AMFContext1* pThis);
          void*               (AMF_STD_CALL *GetOpenCLCommandQueue)(AMFContext1* pThis);
          void*               (AMF_STD_CALL *GetOpenCLDeviceID)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *GetOpenCLComputeFactory)(AMFContext1* pThis, AMFComputeFactory **ppFactory); // advanced compute - multiple queries
          AMF_RESULT          (AMF_STD_CALL *InitOpenCLEx)(AMFContext1* pThis, AMFComputeDevice *pDevice);
          AMF_RESULT          (AMF_STD_CALL *LockOpenCL)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockOpenCL)(AMFContext1* pThis);
  
          // OpenGL
          AMF_RESULT          (AMF_STD_CALL *InitOpenGL)(AMFContext1* pThis, amf_handle hOpenGLContext, amf_handle hWindow, amf_handle hDC);
          amf_handle          (AMF_STD_CALL *GetOpenGLContext)(AMFContext1* pThis);
          amf_handle          (AMF_STD_CALL *GetOpenGLDrawable)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockOpenGL)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockOpenGL)(AMFContext1* pThis);
          // XV - Linux
          AMF_RESULT          (AMF_STD_CALL *InitXV)(AMFContext1* pThis, void* pXVDevice);
          void*               (AMF_STD_CALL *GetXVDevice)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockXV)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockXV)(AMFContext1* pThis);
  
          // Gralloc - Android
          AMF_RESULT          (AMF_STD_CALL *InitGralloc)(AMFContext1* pThis, void* pGrallocDevice);
          void*               (AMF_STD_CALL *GetGrallocDevice)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockGralloc)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockGralloc)(AMFContext1* pThis);
          // Allocation
          AMF_RESULT          (AMF_STD_CALL *AllocBuffer)(AMFContext1* pThis, AMF_MEMORY_TYPE type, amf_size size, AMFBuffer** ppBuffer);
          AMF_RESULT          (AMF_STD_CALL *AllocSurface)(AMFContext1* pThis, AMF_MEMORY_TYPE type, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, AMFSurface** ppSurface);
          AMF_RESULT          (AMF_STD_CALL *AllocAudioBuffer)(AMFContext1* pThis, AMF_MEMORY_TYPE type, AMF_AUDIO_FORMAT format, amf_int32 samples, amf_int32 sampleRate, amf_int32 channels, 
                                                      AMFAudioBuffer** ppAudioBuffer);
  
          // Wrap existing objects
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromHostNative)(AMFContext1* pThis, void* pHostBuffer, amf_size size, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromHostNative)(AMFContext1* pThis, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, amf_int32 hPitch, amf_int32 vPitch, void* pData, 
                                                       AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromDX9Native)(AMFContext1* pThis, void* pDX9Surface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromDX11Native)(AMFContext1* pThis, void* pDX11Surface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromOpenGLNative)(AMFContext1* pThis, AMF_SURFACE_FORMAT format, amf_handle hGLTextureID, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromGrallocNative)(AMFContext1* pThis, amf_handle hGrallocSurface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromOpenCLNative)(AMFContext1* pThis, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, void** pClPlanes, 
                                                       AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromOpenCLNative)(AMFContext1* pThis, void* pCLBuffer, amf_size size, AMFBuffer** ppBuffer);
  
          // Access to AMFCompute interface - AMF_MEMORY_OPENCL, AMF_MEMORY_COMPUTE_FOR_DX9, AMF_MEMORY_COMPUTE_FOR_DX11 are currently supported
          AMF_RESULT          (AMF_STD_CALL *GetCompute)(AMFContext1* pThis, AMF_MEMORY_TYPE eMemType, AMFCompute** ppCompute);
  
          // AMFContext1 interface
  
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromDX11Native)(AMFContext1* pThis, void* pHostBuffer, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *AllocBufferEx)(AMFContext1* pThis, AMF_MEMORY_TYPE type, amf_size size, AMF_BUFFER_USAGE usage, AMF_MEMORY_CPU_ACCESS access, AMFBuffer** ppBuffer);
          AMF_RESULT          (AMF_STD_CALL *AllocSurfaceEx)(AMFContext1* pThis, AMF_MEMORY_TYPE type, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, AMF_SURFACE_USAGE usage, AMF_MEMORY_CPU_ACCESS access, AMFSurface** ppSurface);
  
          // Vulkan - Windows, Linux
          AMF_RESULT          (AMF_STD_CALL *InitVulkan)(AMFContext1* pThis, void* pVulkanDevice);
          void*               (AMF_STD_CALL *GetVulkanDevice)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockVulkan)(AMFContext1* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockVulkan)(AMFContext1* pThis);
  
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromVulkanNative)(AMFContext1* pThis, void* pVulkanImage, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromVulkanNative)(AMFContext1* pThis, void* pVulkanBuffer, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *GetVulkanDeviceExtensions)(AMFContext1* pThis, amf_size *pCount, const char **ppExtensions);
  
      } AMFContext1Vtbl;
  
      struct AMFContext1
      {
          const AMFContext1Vtbl *pVtbl;
      };
  
      typedef struct AMFContext2 AMFContext2;
      AMF_DECLARE_IID(AMFContext2, 0xd9e9f868, 0x6220, 0x44c6, 0xa2, 0x2f, 0x7c, 0xd6, 0xda, 0xc6, 0x86, 0x46)
  
          typedef struct AMFContext2Vtbl
      {
          // AMFInterface interface
          amf_long            (AMF_STD_CALL *Acquire)(AMFContext2* pThis);
          amf_long            (AMF_STD_CALL *Release)(AMFContext2* pThis);
          enum AMF_RESULT     (AMF_STD_CALL *QueryInterface)(AMFContext2* pThis, const struct AMFGuid *interfaceID, void** ppInterface);
  
          // AMFInterface AMFPropertyStorage
  
          AMF_RESULT          (AMF_STD_CALL *SetProperty)(AMFContext2* pThis, const wchar_t* name, AMFVariantStruct value);
          AMF_RESULT          (AMF_STD_CALL *GetProperty)(AMFContext2* pThis, const wchar_t* name, AMFVariantStruct* pValue);
          amf_bool            (AMF_STD_CALL *HasProperty)(AMFContext2* pThis, const wchar_t* name);
          amf_size            (AMF_STD_CALL *GetPropertyCount)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *GetPropertyAt)(AMFContext2* pThis, amf_size index, wchar_t* name, amf_size nameSize, AMFVariantStruct* pValue);
          AMF_RESULT          (AMF_STD_CALL *Clear)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *AddTo)(AMFContext2* pThis, AMFPropertyStorage* pDest, amf_bool overwrite, amf_bool deep);
          AMF_RESULT          (AMF_STD_CALL *CopyTo)(AMFContext2* pThis, AMFPropertyStorage* pDest, amf_bool deep);
          void                (AMF_STD_CALL *AddObserver)(AMFContext2* pThis, AMFPropertyStorageObserver* pObserver);
          void                (AMF_STD_CALL *RemoveObserver)(AMFContext2* pThis, AMFPropertyStorageObserver* pObserver);
  
          // AMFContext interface
  
          // Cleanup
          AMF_RESULT          (AMF_STD_CALL *Terminate)(AMFContext2* pThis);
  
          // DX9
          AMF_RESULT          (AMF_STD_CALL *InitDX9)(AMFContext2* pThis, void* pDX9Device);
          void*                         (AMF_STD_CALL *GetDX9Device)(AMFContext2* pThis, AMF_DX_VERSION dxVersionRequired);
          AMF_RESULT          (AMF_STD_CALL *LockDX9)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockDX9)(AMFContext2* pThis);
          // DX11
          AMF_RESULT          (AMF_STD_CALL *InitDX11)(AMFContext2* pThis, void* pDX11Device, AMF_DX_VERSION dxVersionRequired);
          void*                         (AMF_STD_CALL *GetDX11Device)(AMFContext2* pThis, AMF_DX_VERSION dxVersionRequired);
          AMF_RESULT          (AMF_STD_CALL *LockDX11)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockDX11)(AMFContext2* pThis);
  
          // OpenCL
          AMF_RESULT          (AMF_STD_CALL *InitOpenCL)(AMFContext2* pThis, void* pCommandQueue);
          void*               (AMF_STD_CALL *GetOpenCLContext)(AMFContext2* pThis);
          void*               (AMF_STD_CALL *GetOpenCLCommandQueue)(AMFContext2* pThis);
          void*               (AMF_STD_CALL *GetOpenCLDeviceID)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *GetOpenCLComputeFactory)(AMFContext2* pThis, AMFComputeFactory **ppFactory); // advanced compute - multiple queries
          AMF_RESULT          (AMF_STD_CALL *InitOpenCLEx)(AMFContext2* pThis, AMFComputeDevice *pDevice);
          AMF_RESULT          (AMF_STD_CALL *LockOpenCL)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockOpenCL)(AMFContext2* pThis);
  
          // OpenGL
          AMF_RESULT          (AMF_STD_CALL *InitOpenGL)(AMFContext2* pThis, amf_handle hOpenGLContext, amf_handle hWindow, amf_handle hDC);
          amf_handle          (AMF_STD_CALL *GetOpenGLContext)(AMFContext2* pThis);
          amf_handle          (AMF_STD_CALL *GetOpenGLDrawable)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockOpenGL)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockOpenGL)(AMFContext2* pThis);
          // XV - Linux
          AMF_RESULT          (AMF_STD_CALL *InitXV)(AMFContext2* pThis, void* pXVDevice);
          void*               (AMF_STD_CALL *GetXVDevice)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockXV)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockXV)(AMFContext2* pThis);
  
          // Gralloc - Android
          AMF_RESULT          (AMF_STD_CALL *InitGralloc)(AMFContext2* pThis, void* pGrallocDevice);
          void*               (AMF_STD_CALL *GetGrallocDevice)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockGralloc)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockGralloc)(AMFContext2* pThis);
          // Allocation
          AMF_RESULT          (AMF_STD_CALL *AllocBuffer)(AMFContext2* pThis, AMF_MEMORY_TYPE type, amf_size size, AMFBuffer** ppBuffer);
          AMF_RESULT          (AMF_STD_CALL *AllocSurface)(AMFContext2* pThis, AMF_MEMORY_TYPE type, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, AMFSurface** ppSurface);
          AMF_RESULT          (AMF_STD_CALL *AllocAudioBuffer)(AMFContext2* pThis, AMF_MEMORY_TYPE type, AMF_AUDIO_FORMAT format, amf_int32 samples, amf_int32 sampleRate, amf_int32 channels, AMFAudioBuffer** ppAudioBuffer);
  
          // Wrap existing objects
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromHostNative)(AMFContext2* pThis, void* pHostBuffer, amf_size size, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromHostNative)(AMFContext2* pThis, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, amf_int32 hPitch, amf_int32 vPitch, void* pData,AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromDX9Native)(AMFContext2* pThis, void* pDX9Surface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromDX11Native)(AMFContext2* pThis, void* pDX11Surface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromOpenGLNative)(AMFContext2* pThis, AMF_SURFACE_FORMAT format, amf_handle hGLTextureID, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromGrallocNative)(AMFContext2* pThis, amf_handle hGrallocSurface, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromOpenCLNative)(AMFContext2* pThis, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, void** pClPlanes, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromOpenCLNative)(AMFContext2* pThis, void* pCLBuffer, amf_size size, AMFBuffer** ppBuffer);
  
          // Access to AMFCompute interface - AMF_MEMORY_OPENCL, AMF_MEMORY_COMPUTE_FOR_DX9, AMF_MEMORY_COMPUTE_FOR_DX11 are currently supported
          AMF_RESULT          (AMF_STD_CALL *GetCompute)(AMFContext2* pThis, AMF_MEMORY_TYPE eMemType, AMFCompute** ppCompute);
  
          // AMFContext1 interface
  
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromDX11Native)(AMFContext2* pThis, void* pHostBuffer, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *AllocBufferEx)(AMFContext2* pThis, AMF_MEMORY_TYPE type, amf_size size, AMF_BUFFER_USAGE usage, AMF_MEMORY_CPU_ACCESS access, AMFBuffer** ppBuffer);
          AMF_RESULT          (AMF_STD_CALL *AllocSurfaceEx)(AMFContext2* pThis, AMF_MEMORY_TYPE type, AMF_SURFACE_FORMAT format, amf_int32 width, amf_int32 height, AMF_SURFACE_USAGE usage, AMF_MEMORY_CPU_ACCESS access, AMFSurface** ppSurface);
  
          // Vulkan - Windows, Linux
          AMF_RESULT          (AMF_STD_CALL *InitVulkan)(AMFContext2* pThis, void* pVulkanDevice);
          void*               (AMF_STD_CALL *GetVulkanDevice)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *LockVulkan)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockVulkan)(AMFContext2* pThis);
  
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromVulkanNative)(AMFContext2* pThis, void* pVulkanImage, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromVulkanNative)(AMFContext2* pThis, void* pVulkanBuffer, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *GetVulkanDeviceExtensions)(AMFContext2* pThis, amf_size *pCount, const char **ppExtensions);
  
          // AMFContext2 interface
          AMF_RESULT          (AMF_STD_CALL *InitDX12)(AMFContext2* pThis, void* pDX11Device, AMF_DX_VERSION dxVersionRequired);
          void*               (AMF_STD_CALL *GetDX12Device)(AMFContext2* pThis, AMF_DX_VERSION dxVersionRequired);
          AMF_RESULT          (AMF_STD_CALL *LockDX12)(AMFContext2* pThis);
          AMF_RESULT          (AMF_STD_CALL *UnlockDX12)(AMFContext2* pThis);
  
          AMF_RESULT          (AMF_STD_CALL *CreateSurfaceFromDX12Native)(AMFContext2* pThis, void* pResourceTexture, AMFSurface** ppSurface, AMFSurfaceObserver* pObserver);
          AMF_RESULT          (AMF_STD_CALL *CreateBufferFromDX12Native)(AMFContext2* pThis, void* pResourceBuffer, AMFBuffer** ppBuffer, AMFBufferObserver* pObserver);
  
  
      } AMFContext2Vtbl;
  
      struct AMFContext2
      {
          const AMFContext2Vtbl *pVtbl;
      };
  #endif
  
  #if defined(__cplusplus)
      //----------------------------------------------------------------------------------------------
      // Lockers
      //----------------------------------------------------------------------------------------------
      class AMFContext::AMFDX9Locker
      {
      public:
          AMFDX9Locker() : m_Context(NULL)
          {}
          AMFDX9Locker(AMFContext* resources) : m_Context(NULL)
          {
              Lock(resources);
          }
          ~AMFDX9Locker()
          {
              if(m_Context != NULL)
              {
                  m_Context->UnlockDX9();
              }
          }
          void Lock(AMFContext* resources)
          {
              if(m_Context != NULL)
              {
                  m_Context->UnlockDX9();
              }
              m_Context = resources;
              if(m_Context != NULL)
              {
                  m_Context->LockDX9();
              }
          }
      protected:
          AMFContext* m_Context;
  
      private:
          AMFDX9Locker(const AMFDX9Locker&);
          AMFDX9Locker& operator=(const AMFDX9Locker&);
      };
      //----------------------------------------------------------------------------------------------
      class AMFContext::AMFDX11Locker
      {
      public:
          AMFDX11Locker() : m_Context(NULL)
          {}
          AMFDX11Locker(AMFContext* resources) : m_Context(NULL)
          {
              Lock(resources);
          }
          ~AMFDX11Locker()
          {
              if(m_Context != NULL)
              {
                  m_Context->UnlockDX11();
              }
          }
          void Lock(AMFContext* resources)
          {
              if(m_Context != NULL)
              {
                  m_Context->UnlockDX11();
              }
              m_Context = resources;
              if(m_Context != NULL)
              {
                  m_Context->LockDX11();
              }
          }
      protected:
          AMFContext* m_Context;
  
      private:
          AMFDX11Locker(const AMFDX11Locker&);
          AMFDX11Locker& operator=(const AMFDX11Locker&);
      };
      //----------------------------------------------------------------------------------------------
      class AMFContext::AMFOpenCLLocker
      {
      public:
          AMFOpenCLLocker() : m_Context(NULL)
          {}
          AMFOpenCLLocker(AMFContext* resources) : m_Context(NULL)
          {
              Lock(resources);
          }
          ~AMFOpenCLLocker()
          {
              if(m_Context != NULL)
              {
                  m_Context->UnlockOpenCL();
              }
          }
          void Lock(AMFContext* resources)
          {
              if(m_Context != NULL)
              {
                  m_Context->UnlockOpenCL();
              }
              m_Context = resources;
              if(m_Context != NULL)
              {
                  m_Context->LockOpenCL();
              }
          }
      protected:
          AMFContext* m_Context;
      private:
          AMFOpenCLLocker(const AMFOpenCLLocker&);
          AMFOpenCLLocker& operator=(const AMFOpenCLLocker&);
      };
      //----------------------------------------------------------------------------------------------
      class AMFContext::AMFOpenGLLocker
      {
      public:
          AMFOpenGLLocker(AMFContext* pContext) : m_pContext(pContext),
              m_GLLocked(false)
          {
              if(m_pContext != NULL)
              {
                  if(m_pContext->LockOpenGL() == AMF_OK)
                  {
                      m_GLLocked = true;
                  }
              }
          }
          ~AMFOpenGLLocker()
          {
              if(m_GLLocked)
              {
                  m_pContext->UnlockOpenGL();
              }
          }
      private:
          AMFContext* m_pContext;
          amf_bool m_GLLocked; ///< AMFOpenGLLocker can be called when OpenGL is not initialized yet
                               ///< in this case don't call UnlockOpenGL
          AMFOpenGLLocker(const AMFOpenGLLocker&);
          AMFOpenGLLocker& operator=(const AMFOpenGLLocker&);
      };
      //----------------------------------------------------------------------------------------------
      class AMFContext::AMFXVLocker
      {
      public:
          AMFXVLocker() : m_pContext(NULL)
          {}
          AMFXVLocker(AMFContext* pContext) : m_pContext(NULL)
          {
              Lock(pContext);
          }
          ~AMFXVLocker()
          {
              if(m_pContext != NULL)
              {
                  m_pContext->UnlockXV();
              }
          }
          void Lock(AMFContext* pContext)
          {
              if((pContext != NULL) && (pContext->GetXVDevice() != NULL))
              {
                  m_pContext = pContext;
                  m_pContext->LockXV();
              }
          }
      protected:
          AMFContext* m_pContext;
      private:
          AMFXVLocker(const AMFXVLocker&);
          AMFXVLocker& operator=(const AMFXVLocker&);
      };
      //----------------------------------------------------------------------------------------------
      class AMFContext::AMFGrallocLocker
      {
      public:
          AMFGrallocLocker() : m_pContext(NULL)
          {}
          AMFGrallocLocker(AMFContext* pContext) : m_pContext(NULL)
          {
              Lock(pContext);
          }
          ~AMFGrallocLocker()
          {
              if(m_pContext != NULL)
              {
                  m_pContext->UnlockGralloc();
              }
          }
          void Lock(AMFContext* pContext)
          {
              if((pContext != NULL) && (pContext->GetGrallocDevice() != NULL))
              {
                  m_pContext = pContext;
                  m_pContext->LockGralloc();
              }
          }
      protected:
          AMFContext* m_pContext;
      private:
          AMFGrallocLocker(const AMFGrallocLocker&);
          AMFGrallocLocker& operator=(const AMFGrallocLocker&);
      };
      //----------------------------------------------------------------------------------------------
      class AMFContext1::AMFVulkanLocker
      {
      public:
          AMFVulkanLocker() : m_pContext(NULL)
          {}
          AMFVulkanLocker(AMFContext1* pContext) : m_pContext(NULL)
          {
              Lock(pContext);
          }
          ~AMFVulkanLocker()
          {
              if(m_pContext != NULL)
              {
                  m_pContext->UnlockVulkan();
              }
          }
          void Lock(AMFContext1* pContext)
          {
              if((pContext != NULL) && (pContext->GetVulkanDevice() != NULL))
              {
                  m_pContext = pContext;
                  m_pContext->LockVulkan();
              }
          }
      protected:
          AMFContext1* m_pContext;
      private:
          AMFVulkanLocker(const AMFVulkanLocker&);
          AMFVulkanLocker& operator=(const AMFVulkanLocker&);
      };
      //----------------------------------------------------------------------------------------------
      class AMFContext2::AMFDX12Locker
      {
      public:
          AMFDX12Locker() : m_Context(NULL)
          {}
          AMFDX12Locker(AMFContext2* resources) : m_Context(NULL)
          {
              Lock(resources);
          }
          ~AMFDX12Locker()
          {
              if (m_Context != NULL)
              {
                  m_Context->UnlockDX12();
              }
          }
          void Lock(AMFContext2* resources)
          {
              if (m_Context != NULL)
              {
                  m_Context->UnlockDX12();
              }
              m_Context = resources;
              if (m_Context != NULL)
              {
                  m_Context->LockDX12();
              }
          }
      protected:
          AMFContext2* m_Context;
  
      private:
          AMFDX12Locker(const AMFDX12Locker&);
          AMFDX12Locker& operator=(const AMFDX12Locker&);
      };
      //----------------------------------------------------------------------------------------------
      //----------------------------------------------------------------------------------------------
      //----------------------------------------------------------------------------------------------
  #endif
  #if defined(__cplusplus)
  }
  #endif
  enum AMF_CONTEXT_DEVICETYPE_ENUM
  {
      AMF_CONTEXT_DEVICE_TYPE_GPU = 0,
      AMF_CONTEXT_DEVICE_TYPE_CPU
  };
  #define AMF_CONTEXT_DEVICE_TYPE  L"AMF_Context_DeviceType" //Value type: amf_int64; Values : AMF_CONTEXT_DEVICE_TYPE_GPU for GPU (default) , AMF_CONTEXT_DEVICE_TYPE_CPU for CPU.
  #endif //#ifndef AMF_Context_h
  