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Diffstat (limited to 'libavfilter/vf_thumbnail_cuda.cu')
-rw-r--r-- | libavfilter/vf_thumbnail_cuda.cu | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/libavfilter/vf_thumbnail_cuda.cu b/libavfilter/vf_thumbnail_cuda.cu new file mode 100644 index 0000000000..98fad4303a --- /dev/null +++ b/libavfilter/vf_thumbnail_cuda.cu @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +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) +{ + 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); + atomicAdd(&histogram[pixel], 1); + } +} + +__global__ void Thumbnail_uchar2(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); + atomicAdd(&histogram[pixel.x], 1); + atomicAdd(&histogram[256 + pixel.y], 1); + } +} + +__global__ void Thumbnail_ushort(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; + atomicAdd(&histogram[pixel], 1); + } +} + +__global__ void Thumbnail_ushort2(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); + atomicAdd(&histogram[(pixel.x + 128) >> 8], 1); + atomicAdd(&histogram[256 + (pixel.y + 128) >> 8], 1); + } +} + +} |