mirror of https://git.ffmpeg.org/ffmpeg.git
213 lines
9.5 KiB
Plaintext
213 lines
9.5 KiB
Plaintext
/*
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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<uchar4, 2> uchar4_tex;
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texture<unsigned short, 2> ushort_tex;
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texture<ushort2, 2> ushort2_tex;
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texture<ushort4, 2> ushort4_tex;
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__global__ void Subsample_Bilinear_uchar(unsigned char *dst,
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int dst_width, int dst_height, int dst_pitch,
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int src_width, int src_height)
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{
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int xo = blockIdx.x * blockDim.x + threadIdx.x;
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int yo = blockIdx.y * blockDim.y + threadIdx.y;
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if (yo < dst_height && xo < dst_width)
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{
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float hscale = (float)src_width / (float)dst_width;
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float vscale = (float)src_height / (float)dst_height;
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float xi = (xo + 0.5f) * hscale;
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float yi = (yo + 0.5f) * vscale;
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// 3-tap filter weights are {wh,1.0,wh} and {wv,1.0,wv}
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float wh = min(max(0.5f * (hscale - 1.0f), 0.0f), 1.0f);
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float wv = min(max(0.5f * (vscale - 1.0f), 0.0f), 1.0f);
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// Convert weights to two bilinear weights -> {wh,1.0,wh} -> {wh,0.5,0} + {0,0.5,wh}
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float dx = wh / (0.5f + wh);
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float dy = wv / (0.5f + wv);
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int y0 = tex2D(uchar_tex, xi-dx, yi-dy);
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int y1 = tex2D(uchar_tex, xi+dx, yi-dy);
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int y2 = tex2D(uchar_tex, xi-dx, yi+dy);
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int y3 = tex2D(uchar_tex, xi+dx, yi+dy);
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dst[yo*dst_pitch+xo] = (unsigned char)((y0+y1+y2+y3+2) >> 2);
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}
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}
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__global__ void Subsample_Bilinear_uchar2(uchar2 *dst,
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int dst_width, int dst_height, int dst_pitch2,
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int src_width, int src_height)
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{
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int xo = blockIdx.x * blockDim.x + threadIdx.x;
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int yo = blockIdx.y * blockDim.y + threadIdx.y;
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if (yo < dst_height && xo < dst_width)
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{
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float hscale = (float)src_width / (float)dst_width;
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float vscale = (float)src_height / (float)dst_height;
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float xi = (xo + 0.5f) * hscale;
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float yi = (yo + 0.5f) * vscale;
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// 3-tap filter weights are {wh,1.0,wh} and {wv,1.0,wv}
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float wh = min(max(0.5f * (hscale - 1.0f), 0.0f), 1.0f);
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float wv = min(max(0.5f * (vscale - 1.0f), 0.0f), 1.0f);
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// Convert weights to two bilinear weights -> {wh,1.0,wh} -> {wh,0.5,0} + {0,0.5,wh}
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float dx = wh / (0.5f + wh);
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float dy = wv / (0.5f + wv);
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uchar2 c0 = tex2D(uchar2_tex, xi-dx, yi-dy);
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uchar2 c1 = tex2D(uchar2_tex, xi+dx, yi-dy);
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uchar2 c2 = tex2D(uchar2_tex, xi-dx, yi+dy);
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uchar2 c3 = tex2D(uchar2_tex, xi+dx, yi+dy);
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int2 uv;
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uv.x = ((int)c0.x+(int)c1.x+(int)c2.x+(int)c3.x+2) >> 2;
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uv.y = ((int)c0.y+(int)c1.y+(int)c2.y+(int)c3.y+2) >> 2;
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dst[yo*dst_pitch2+xo] = make_uchar2((unsigned char)uv.x, (unsigned char)uv.y);
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}
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}
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__global__ void Subsample_Bilinear_uchar4(uchar4 *dst,
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int dst_width, int dst_height, int dst_pitch,
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int src_width, int src_height)
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{
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int xo = blockIdx.x * blockDim.x + threadIdx.x;
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int yo = blockIdx.y * blockDim.y + threadIdx.y;
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if (yo < dst_height && xo < dst_width)
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{
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float hscale = (float)src_width / (float)dst_width;
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float vscale = (float)src_height / (float)dst_height;
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float xi = (xo + 0.5f) * hscale;
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float yi = (yo + 0.5f) * vscale;
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// 3-tap filter weights are {wh,1.0,wh} and {wv,1.0,wv}
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float wh = min(max(0.5f * (hscale - 1.0f), 0.0f), 1.0f);
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float wv = min(max(0.5f * (vscale - 1.0f), 0.0f), 1.0f);
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// Convert weights to two bilinear weights -> {wh,1.0,wh} -> {wh,0.5,0} + {0,0.5,wh}
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float dx = wh / (0.5f + wh);
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float dy = wv / (0.5f + wv);
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uchar4 c0 = tex2D(uchar4_tex, xi-dx, yi-dy);
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uchar4 c1 = tex2D(uchar4_tex, xi+dx, yi-dy);
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uchar4 c2 = tex2D(uchar4_tex, xi-dx, yi+dy);
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uchar4 c3 = tex2D(uchar4_tex, xi+dx, yi+dy);
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int4 res;
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res.x = ((int)c0.x+(int)c1.x+(int)c2.x+(int)c3.x+2) >> 2;
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res.y = ((int)c0.y+(int)c1.y+(int)c2.y+(int)c3.y+2) >> 2;
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res.z = ((int)c0.z+(int)c1.z+(int)c2.z+(int)c3.z+2) >> 2;
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res.w = ((int)c0.w+(int)c1.w+(int)c2.w+(int)c3.w+2) >> 2;
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dst[yo*dst_pitch+xo] = make_uchar4(
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(unsigned char)res.x, (unsigned char)res.y, (unsigned char)res.z, (unsigned char)res.w);
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}
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}
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__global__ void Subsample_Bilinear_ushort(unsigned short *dst,
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int dst_width, int dst_height, int dst_pitch,
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int src_width, int src_height)
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{
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int xo = blockIdx.x * blockDim.x + threadIdx.x;
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int yo = blockIdx.y * blockDim.y + threadIdx.y;
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if (yo < dst_height && xo < dst_width)
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{
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float hscale = (float)src_width / (float)dst_width;
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float vscale = (float)src_height / (float)dst_height;
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float xi = (xo + 0.5f) * hscale;
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float yi = (yo + 0.5f) * vscale;
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// 3-tap filter weights are {wh,1.0,wh} and {wv,1.0,wv}
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float wh = min(max(0.5f * (hscale - 1.0f), 0.0f), 1.0f);
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float wv = min(max(0.5f * (vscale - 1.0f), 0.0f), 1.0f);
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// Convert weights to two bilinear weights -> {wh,1.0,wh} -> {wh,0.5,0} + {0,0.5,wh}
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float dx = wh / (0.5f + wh);
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float dy = wv / (0.5f + wv);
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int y0 = tex2D(ushort_tex, xi-dx, yi-dy);
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int y1 = tex2D(ushort_tex, xi+dx, yi-dy);
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int y2 = tex2D(ushort_tex, xi-dx, yi+dy);
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int y3 = tex2D(ushort_tex, xi+dx, yi+dy);
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dst[yo*dst_pitch+xo] = (unsigned short)((y0+y1+y2+y3+2) >> 2);
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}
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}
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__global__ void Subsample_Bilinear_ushort2(ushort2 *dst,
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int dst_width, int dst_height, int dst_pitch2,
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int src_width, int src_height)
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{
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int xo = blockIdx.x * blockDim.x + threadIdx.x;
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int yo = blockIdx.y * blockDim.y + threadIdx.y;
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if (yo < dst_height && xo < dst_width)
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{
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float hscale = (float)src_width / (float)dst_width;
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float vscale = (float)src_height / (float)dst_height;
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float xi = (xo + 0.5f) * hscale;
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float yi = (yo + 0.5f) * vscale;
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// 3-tap filter weights are {wh,1.0,wh} and {wv,1.0,wv}
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float wh = min(max(0.5f * (hscale - 1.0f), 0.0f), 1.0f);
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float wv = min(max(0.5f * (vscale - 1.0f), 0.0f), 1.0f);
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// Convert weights to two bilinear weights -> {wh,1.0,wh} -> {wh,0.5,0} + {0,0.5,wh}
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float dx = wh / (0.5f + wh);
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float dy = wv / (0.5f + wv);
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ushort2 c0 = tex2D(ushort2_tex, xi-dx, yi-dy);
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ushort2 c1 = tex2D(ushort2_tex, xi+dx, yi-dy);
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ushort2 c2 = tex2D(ushort2_tex, xi-dx, yi+dy);
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ushort2 c3 = tex2D(ushort2_tex, xi+dx, yi+dy);
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int2 uv;
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uv.x = ((int)c0.x+(int)c1.x+(int)c2.x+(int)c3.x+2) >> 2;
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uv.y = ((int)c0.y+(int)c1.y+(int)c2.y+(int)c3.y+2) >> 2;
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dst[yo*dst_pitch2+xo] = make_ushort2((unsigned short)uv.x, (unsigned short)uv.y);
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}
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}
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__global__ void Subsample_Bilinear_ushort4(ushort4 *dst,
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int dst_width, int dst_height, int dst_pitch,
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int src_width, int src_height)
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{
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int xo = blockIdx.x * blockDim.x + threadIdx.x;
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int yo = blockIdx.y * blockDim.y + threadIdx.y;
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if (yo < dst_height && xo < dst_width)
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{
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float hscale = (float)src_width / (float)dst_width;
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float vscale = (float)src_height / (float)dst_height;
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float xi = (xo + 0.5f) * hscale;
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float yi = (yo + 0.5f) * vscale;
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// 3-tap filter weights are {wh,1.0,wh} and {wv,1.0,wv}
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float wh = min(max(0.5f * (hscale - 1.0f), 0.0f), 1.0f);
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float wv = min(max(0.5f * (vscale - 1.0f), 0.0f), 1.0f);
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// Convert weights to two bilinear weights -> {wh,1.0,wh} -> {wh,0.5,0} + {0,0.5,wh}
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float dx = wh / (0.5f + wh);
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float dy = wv / (0.5f + wv);
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ushort4 c0 = tex2D(ushort4_tex, xi-dx, yi-dy);
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ushort4 c1 = tex2D(ushort4_tex, xi+dx, yi-dy);
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ushort4 c2 = tex2D(ushort4_tex, xi-dx, yi+dy);
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ushort4 c3 = tex2D(ushort4_tex, xi+dx, yi+dy);
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int4 res;
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res.x = ((int)c0.x+(int)c1.x+(int)c2.x+(int)c3.x+2) >> 2;
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res.y = ((int)c0.y+(int)c1.y+(int)c2.y+(int)c3.y+2) >> 2;
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res.z = ((int)c0.z+(int)c1.z+(int)c2.z+(int)c3.z+2) >> 2;
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res.w = ((int)c0.w+(int)c1.w+(int)c2.w+(int)c3.w+2) >> 2;
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dst[yo*dst_pitch+xo] = make_ushort4(
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(unsigned short)res.x, (unsigned short)res.y, (unsigned short)res.z, (unsigned short)res.w);
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}
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}
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}
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