Added NvFBC on Linux

sunshine/platform/linux/cuda.h

@@ -1,15 +1,16 @@
 #ifndef SUNSHINE_PLATFORM_CUDA_H
 #define SUNSHINE_PLATFORM_CUDA_H
 
-#include <memory>
-
 #ifndef __NVCC__
 
 #include "sunshine/platform/common.h"
 #include "x11grab.h"
 
 namespace cuda {
-std::shared_ptr<platf::hwdevice_t> make_hwdevice(int width, int height, platf::x11::xdisplay_t::pointer xdisplay);
+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
 
@@ -41,9 +42,26 @@ struct viewport_t {
   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;
+  cudaTextureObject_t texture;
+};
+
 class sws_t {
 public:
-  ~sws_t();
+  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);
 
   /**
@@ -52,19 +70,17 @@ public:
    * 
    * pitch -- The size of a single row of pixels in bytes
    */
-  static std::unique_ptr<sws_t> make(int in_width, int in_height, int out_width, int out_height, int pitch);
+  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);
-  int convert(std::uint8_t *Y, std::uint8_t *UV, std::uint32_t pitchY, std::uint32_t pitchUV, const viewport_t &viewport);
+  int convert(std::uint8_t *Y, std::uint8_t *UV, std::uint32_t pitchY, std::uint32_t pitchUV, cudaTextureObject_t texture);
+  int convert(std::uint8_t *Y, std::uint8_t *UV, std::uint32_t pitchY, std::uint32_t pitchUV, cudaTextureObject_t texture, const viewport_t &viewport);
 
   void set_colorspace(std::uint32_t colorspace, std::uint32_t color_range);
 
-  int load_ram(platf::img_t &img);
+  int load_ram(platf::img_t &img, cudaArray_t array);
 
   ptr_t color_matrix;
-  cudaArray_t array;
-  cudaTextureObject_t texture;
 
   int threadsPerBlock;