Sunshine/sunshine/platform/linux/cuda.h

#if !defined(SUNSHINE_PLATFORM_CUDA_H) && defined(SUNSHINE_BUILD_CUDA)
#define SUNSHINE_PLATFORM_CUDA_H

#include <memory>
#include <optional>
#include <string>
#include <vector>

namespace platf {
class hwdevice_t;
class img_t;
} // namespace platf

namespace cuda {

namespace nvfbc {
std::vector<std::string> display_names();
}
std::shared_ptr<platf::hwdevice_t> make_hwdevice(int width, int height, bool vram);
int init();
} // namespace cuda

typedef struct cudaArray *cudaArray_t;

#if !defined(__CUDACC__)
typedef struct CUstream_st *cudaStream_t;
typedef unsigned long long cudaTextureObject_t;
#else  /* defined(__CUDACC__) */
typedef __location__(device_builtin) struct CUstream_st *cudaStream_t;
typedef __location__(device_builtin) unsigned long long cudaTextureObject_t;
#endif /* !defined(__CUDACC__) */

namespace cuda {

class freeCudaPtr_t {
public:
  void operator()(void *ptr);
};

class freeCudaStream_t {
public:
  void operator()(cudaStream_t ptr);
};

using ptr_t    = std::unique_ptr<void, freeCudaPtr_t>;
using stream_t = std::unique_ptr<CUstream_st, freeCudaStream_t>;

stream_t make_stream(int flags = 0);

struct viewport_t {
  int width, height;
  int offsetX, offsetY;
};

class tex_t {
public:
  static std::optional<tex_t> make(int height, int pitch);

  tex_t();
  tex_t(tex_t &&);

  tex_t &operator=(tex_t &&other);

  ~tex_t();

  int copy(std::uint8_t *src, int height, int pitch);

  cudaArray_t array;

  struct texture {
    cudaTextureObject_t point;
    cudaTextureObject_t linear;
  } texture;
};

class sws_t {
public:
  sws_t() = default;
  sws_t(int in_width, int in_height, int out_width, int out_height, int pitch, int threadsPerBlock, ptr_t &&color_matrix);

  /**
   * in_width, in_height -- The width and height of the captured image in pixels
   * out_width, out_height -- the width and height of the NV12 image in pixels
   * 
   * pitch -- The size of a single row of pixels in bytes
   */
  static std::optional<sws_t> make(int in_width, int in_height, int out_width, int out_height, int pitch);

  // Converts loaded image into a CUDevicePtr
  int convert(std::uint8_t *Y, std::uint8_t *UV, std::uint32_t pitchY, std::uint32_t pitchUV, cudaTextureObject_t texture, stream_t::pointer stream);
  int convert(std::uint8_t *Y, std::uint8_t *UV, std::uint32_t pitchY, std::uint32_t pitchUV, cudaTextureObject_t texture, stream_t::pointer stream, const viewport_t &viewport);

  void set_colorspace(std::uint32_t colorspace, std::uint32_t color_range);

  int load_ram(platf::img_t &img, cudaArray_t array);

  ptr_t color_matrix;

  int threadsPerBlock;

  viewport_t viewport;

  float scale;
};
} // namespace cuda

#endif