xbmc/cores/RetroPlayer/buffers/RenderBufferDMA.h

   1 /*
   2  *  Copyright (C) 2017-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #pragma once
  10
  11 #include "cores/RetroPlayer/buffers/BaseRenderBuffer.h"
  12
  13 #include <memory>
  14
  15 #include "system_gl.h"
  16
  17 class CEGLImage;
  18 class IBufferObject;
  19
  20 namespace KODI
  21 {
  22 namespace RETRO
  23 {
  24 class CRenderContext;
  25
  26 /**
  27  * @brief Special IRenderBuffer implementation for use with CBufferObject.
  28  *        This buffer type uses Direct Memory Access (DMA) sharing via file
  29  *        descriptors (fds). The file descriptor is then used to create an
  30  *        EGL image.
  31  *
  32  */
  33 class CRenderBufferDMA : public CBaseRenderBuffer
  34 {
  35 public:
  36   CRenderBufferDMA(CRenderContext& context, int fourcc);
  37   ~CRenderBufferDMA() override;
  38
  39   // implementation of IRenderBuffer via CRenderBufferSysMem
  40   bool Allocate(AVPixelFormat format, unsigned int width, unsigned int height) override;
  41   size_t GetFrameSize() const override;
  42   uint8_t* GetMemory() override;
  43   void ReleaseMemory() override;
  44
  45   // implementation of IRenderBuffer
  46   bool UploadTexture() override;
  47
  48   GLuint TextureID() const { return m_textureId; }
  49
  50 protected:
  51   // Construction parameters
  52   CRenderContext& m_context;
  53   const int m_fourcc = 0;
  54
  55   const GLenum m_textureTarget = GL_TEXTURE_2D;
  56   GLuint m_textureId = 0;
  57
  58 private:
  59   void CreateTexture();
  60   void DeleteTexture();
  61
  62   std::unique_ptr<CEGLImage> m_egl;
  63   std::unique_ptr<IBufferObject> m_bo;
  64 };
  65 } // namespace RETRO
  66 } // namespace KODI