1 /*M/////////////////////////////////////////////////////////////////////////////////////// 2 // 3 // IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. 4 // 5 // By downloading, copying, installing or using the software you agree to this license. 6 // If you do not agree to this license, do not download, install, 7 // copy or use the software. 8 // 9 // 10 // License Agreement 11 // For Open Source Computer Vision Library 12 // 13 // Copyright (C) 2010-2012, Multicoreware, Inc., all rights reserved. 14 // Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved. 15 // Third party copyrights are property of their respective owners. 16 // 17 // @Authors 18 // Peng Xiao, pengxiao (at) multicorewareinc.com 19 // 20 // Redistribution and use in source and binary forms, with or without modification, 21 // are permitted provided that the following conditions are met: 22 // 23 // * Redistribution's of source code must retain the above copyright notice, 24 // this list of conditions and the following disclaimer. 25 // 26 // * Redistribution's in binary form must reproduce the above copyright notice, 27 // this list of conditions and the following disclaimer in the documentation 28 // and/or other materials provided with the distribution. 29 // 30 // * The name of the copyright holders may not be used to endorse or promote products 31 // derived from this software without specific prior written permission. 32 // 33 // This software is provided by the copyright holders and contributors as is and 34 // any express or implied warranties, including, but not limited to, the implied 35 // warranties of merchantability and fitness for a particular purpose are disclaimed. 36 // In no event shall the uintel Corporation or contributors be liable for any direct, 37 // indirect, incidental, special, exemplary, or consequential damages 38 // (including, but not limited to, procurement of substitute goods or services; 39 // loss of use, data, or profits; or business uinterruption) however caused 40 // and on any theory of liability, whether in contract, strict liability, 41 // or tort (including negligence or otherwise) arising in any way out of 42 // the use of this software, even if advised of the possibility of such damage. 43 // 44 //M*/ 45 46 inline float2 cmulf(float2 a, float2 b) 47 { 48 return (float2)(mad(a.x, b.x, - a.y * b.y), mad(a.x, b.y, a.y * b.x)); 49 } 50 51 inline float2 conjf(float2 a) 52 { 53 return (float2)(a.x, - a.y); 54 } 55 56 __kernel void mulAndScaleSpectrums(__global const uchar * src1ptr, int src1_step, int src1_offset, 57 __global const uchar * src2ptr, int src2_step, int src2_offset, 58 __global uchar * dstptr, int dst_step, int dst_offset, 59 int dst_rows, int dst_cols, int rowsPerWI) 60 { 61 int x = get_global_id(0); 62 int y0 = get_global_id(1) * rowsPerWI; 63 64 if (x < dst_cols) 65 { 66 int src1_index = mad24(y0, src1_step, mad24(x, (int)sizeof(float2), src1_offset)); 67 int src2_index = mad24(y0, src2_step, mad24(x, (int)sizeof(float2), src2_offset)); 68 int dst_index = mad24(y0, dst_step, mad24(x, (int)sizeof(float2), dst_offset)); 69 70 for (int y = y0, y1 = min(dst_rows, y0 + rowsPerWI); y < y1; ++y, 71 src1_index += src1_step, src2_index += src2_step, dst_index += dst_step) 72 { 73 float2 src0 = *(__global const float2 *)(src1ptr + src1_index); 74 float2 src1 = *(__global const float2 *)(src2ptr + src2_index); 75 __global float2 * dst = (__global float2 *)(dstptr + dst_index); 76 77 #ifdef CONJ 78 float2 v = cmulf(src0, conjf(src1)); 79 #else 80 float2 v = cmulf(src0, src1); 81 #endif 82 dst[0] = v; 83 } 84 } 85 } 86
