avfilter/vf_thumbnail_cuda: Switch to using ffnvcodec

This change switches the vf_thumbnail_cuda filter from using the
full cuda sdk to using the ffnvcodec headers and loader.

Most of the change is a direct mapping, but I also switched from
using texture references to using texture objects. This is supposed
to be the preferred way of using textures, and the texture object API
is the one I added to ffnvcodec.
Signed-off-by: Philip Langdale <philipl@overt.org>
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

configure

@@ -2976,7 +2976,7 @@ v4l2_m2m_deps="linux_videodev2_h sem_timedwait"
 hwupload_cuda_filter_deps="ffnvcodec"
 scale_npp_filter_deps="ffnvcodec libnpp"
 scale_cuda_filter_deps="ffnvcodec cuda_nvcc"
-thumbnail_cuda_filter_deps="cuda_sdk"
+thumbnail_cuda_filter_deps="ffnvcodec cuda_nvcc"
 transpose_npp_filter_deps="ffnvcodec libnpp"
 
 amf_deps_any="libdl LoadLibrary"

libavfilter/vf_thumbnail_cuda.cu

@@ -22,55 +22,54 @@
 
 extern "C" {
 
-texture<unsigned char, 2> uchar_tex;
-texture<uchar2, 2>  uchar2_tex;
-texture<unsigned short, 2> ushort_tex;
-texture<ushort2, 2>  ushort2_tex;
-
-__global__ void Thumbnail_uchar(int *histogram, int src_width, int src_height)
+__global__ void Thumbnail_uchar(cudaTextureObject_t uchar_tex,
+                                int *histogram, int src_width, int src_height)
 {
     int x = blockIdx.x * blockDim.x + threadIdx.x;
     int y = blockIdx.y * blockDim.y + threadIdx.y;
     if (y < src_height && x < src_width)
     {
-        unsigned char pixel = tex2D(uchar_tex, x, y);
+        unsigned char pixel = tex2D<unsigned char>(uchar_tex, x, y);
         atomicAdd(&histogram[pixel], 1);
     }
 }
 
-__global__ void Thumbnail_uchar2(int *histogram, int src_width, int src_height)
+__global__ void Thumbnail_uchar2(cudaTextureObject_t uchar2_tex,
+                                 int *histogram, int src_width, int src_height)
 {
     int x = blockIdx.x * blockDim.x + threadIdx.x;
     int y = blockIdx.y * blockDim.y + threadIdx.y;
 
     if (y < src_height && x < src_width)
     {
-        uchar2 pixel = tex2D(uchar2_tex, x, y);
+        uchar2 pixel = tex2D<uchar2>(uchar2_tex, x, y);
         atomicAdd(&histogram[pixel.x], 1);
         atomicAdd(&histogram[256 + pixel.y], 1);
     }
 }
 
-__global__ void Thumbnail_ushort(int *histogram, int src_width, int src_height)
+__global__ void Thumbnail_ushort(cudaTextureObject_t ushort_tex,
+                                 int *histogram, int src_width, int src_height)
 {
     int x = blockIdx.x * blockDim.x + threadIdx.x;
     int y = blockIdx.y * blockDim.y + threadIdx.y;
 
     if (y < src_height && x < src_width)
     {
-        unsigned short pixel = (tex2D(ushort_tex, x, y) + 128) >> 8;
+        unsigned short pixel = (tex2D<unsigned short>(ushort_tex, x, y) + 128) >> 8;
         atomicAdd(&histogram[pixel], 1);
     }
 }
 
-__global__ void Thumbnail_ushort2(int *histogram, int src_width, int src_height)
+__global__ void Thumbnail_ushort2(cudaTextureObject_t ushort2_tex,
+                                  int *histogram, int src_width, int src_height)
 {
     int x = blockIdx.x * blockDim.x + threadIdx.x;
     int y = blockIdx.y * blockDim.y + threadIdx.y;
 
     if (y < src_height && x < src_width)
     {
-        ushort2 pixel = tex2D(ushort2_tex, x, y);
+        ushort2 pixel = tex2D<ushort2>(ushort2_tex, x, y);
         atomicAdd(&histogram[(pixel.x + 128) >> 8], 1);
         atomicAdd(&histogram[256 + (pixel.y + 128) >> 8], 1);
     }