sunshine-sdk/src/platform/linux/cuda.h

/**
 * @file src/platform/linux/cuda.h
 * @brief todo
 */
#pragma once

#if defined(SUNSHINE_BUILD_CUDA)

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

#include "src/video_colorspace.h"

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

namespace cuda {

namespace nvfbc {
std::vector<std::string> display_names();
}
std::unique_ptr<platf::avcodec_encode_device_t> make_avcodec_encode_device(
    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 apply_colorspace(const video::sunshine_colorspace_t &colorspace);

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

    ptr_t color_matrix;

    int threadsPerBlock;

    viewport_t viewport;

    float scale;
};
}  // namespace cuda

#endif