Refacto CUDA files

[simon-riou]

Structure might not always be the best
Useless includes
Dead code
Unused function
Bad comments
...

[simon-riou]

https://developer.nvidia.com/blog/cuda-pro-tip-optimize-pointer-aliasing/

[simon-riou]

Todo list of CUDA files

• apply_mask.cu
• composite.cu
• convolution.cu
• angular_spectrum.cu
• frame_reshape.cu
• input_filter.cu
• percentile.cu
• rgb.cu
• stft.c
• texture_update.cu
• tools_compute.cu
• tools_hsv.cu
• transforms.cu
• chart.cu
• contrast_correction.cu
• fresnel_transform.cu
• filter2D.cu
• hsv.cu
• map.cu
• reduce.cu
• shift_corners.cu
• test_reduce.cu (What is the purpose of this file ?)
• tools.cu
• tools_conversion.cu
• tools_unwrap.cu
• unpack.cu
• cuda_memory

[Hpn4]

You can delete:

• frame_reshape.cc and frame_reshape.hh
• in reduce functions: reduce_min, reduce_max, gpu_reduce and delete duplicate functions that are in reduce.cc and in reduce.cuhxx (you can basically delete reduce.cc)
• in map functions: map_divide
• in shift_corners functions that have 6 paramètres (only the 5 parameters one are called)

[simon-riou]

https://developer.nvidia.com/blog/using-cuda-warp-level-primitives/

I use it in kernel_apply_mapped_zone_sum in chart.cu to avoid too many calls of atomic op