mirror of https://git.ffmpeg.org/ffmpeg.git
80 lines
2.7 KiB
Plaintext
80 lines
2.7 KiB
Plaintext
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/*
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* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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extern "C" {
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texture<unsigned char, 2> uchar_tex;
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texture<uchar2, 2> uchar2_tex;
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texture<unsigned short, 2> ushort_tex;
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texture<ushort2, 2> ushort2_tex;
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__global__ void Thumbnail_uchar(int *histogram, int src_width, int src_height)
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{
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int x = blockIdx.x * blockDim.x + threadIdx.x;
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int y = blockIdx.y * blockDim.y + threadIdx.y;
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if (y < src_height && x < src_width)
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{
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unsigned char pixel = tex2D(uchar_tex, x, y);
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atomicAdd(&histogram[pixel], 1);
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}
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}
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__global__ void Thumbnail_uchar2(int *histogram, int src_width, int src_height)
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{
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int x = blockIdx.x * blockDim.x + threadIdx.x;
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int y = blockIdx.y * blockDim.y + threadIdx.y;
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if (y < src_height && x < src_width)
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{
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uchar2 pixel = tex2D(uchar2_tex, x, y);
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atomicAdd(&histogram[pixel.x], 1);
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atomicAdd(&histogram[256 + pixel.y], 1);
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}
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}
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__global__ void Thumbnail_ushort(int *histogram, int src_width, int src_height)
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{
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int x = blockIdx.x * blockDim.x + threadIdx.x;
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int y = blockIdx.y * blockDim.y + threadIdx.y;
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if (y < src_height && x < src_width)
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{
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unsigned short pixel = (tex2D(ushort_tex, x, y) + 128) >> 8;
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atomicAdd(&histogram[pixel], 1);
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}
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}
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__global__ void Thumbnail_ushort2(int *histogram, int src_width, int src_height)
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{
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int x = blockIdx.x * blockDim.x + threadIdx.x;
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int y = blockIdx.y * blockDim.y + threadIdx.y;
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if (y < src_height && x < src_width)
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{
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ushort2 pixel = tex2D(ushort2_tex, x, y);
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atomicAdd(&histogram[(pixel.x + 128) >> 8], 1);
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atomicAdd(&histogram[256 + (pixel.y + 128) >> 8], 1);
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}
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}
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}
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