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224 lines
8.9 KiB
Common Lisp
224 lines
8.9 KiB
Common Lisp
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/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2010-2012, Institute Of Software Chinese Academy Of Science, all rights reserved.
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// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// @Authors
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// Zhang Ying, zhangying913@gmail.com
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors as is and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#ifdef DOUBLE_SUPPORT
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#ifdef cl_amd_fp64
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#pragma OPENCL EXTENSION cl_amd_fp64:enable
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#elif defined (cl_khr_fp64)
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#pragma OPENCL EXTENSION cl_khr_fp64:enable
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#endif
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#define CT double
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#else
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#define CT float
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#endif
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#define INTER_BITS 5
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#define INTER_TAB_SIZE (1 << INTER_BITS)
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#define INTER_SCALE 1.f / INTER_TAB_SIZE
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#define AB_BITS max(10, (int)INTER_BITS)
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#define AB_SCALE (1 << AB_BITS)
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#define INTER_REMAP_COEF_BITS 15
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#define INTER_REMAP_COEF_SCALE (1 << INTER_REMAP_COEF_BITS)
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#define noconvert
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#ifdef INTER_NEAREST
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__kernel void warpPerspective(__global const uchar * srcptr, int src_step, int src_offset, int src_rows, int src_cols,
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__global uchar * dstptr, int dst_step, int dst_offset, int dst_rows, int dst_cols,
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__constant CT * M, T scalar)
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{
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int dx = get_global_id(0);
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int dy = get_global_id(1);
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if (dx < dst_cols && dy < dst_rows)
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{
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CT X0 = M[0] * dx + M[1] * dy + M[2];
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CT Y0 = M[3] * dx + M[4] * dy + M[5];
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CT W = M[6] * dx + M[7] * dy + M[8];
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W = W != 0.0f ? 1.f / W : 0.0f;
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short sx = convert_short_sat_rte(X0*W);
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short sy = convert_short_sat_rte(Y0*W);
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int dst_index = mad24(dy, dst_step, dx * (int)sizeof(T) + dst_offset);
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__global T * dst = (__global T *)(dstptr + dst_index);
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if (sx >= 0 && sx < src_cols && sy >= 0 && sy < src_rows)
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{
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int src_index = mad24(sy, src_step, sx * (int)sizeof(T) + src_offset);
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__global const T * src = (__global const T *)(srcptr + src_index);
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dst[0] = src[0];
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}
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else
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dst[0] = scalar;
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}
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}
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#elif defined INTER_LINEAR
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__kernel void warpPerspective(__global const uchar * srcptr, int src_step, int src_offset, int src_rows, int src_cols,
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__global uchar * dstptr, int dst_step, int dst_offset, int dst_rows, int dst_cols,
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__constant CT * M, WT scalar)
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{
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int dx = get_global_id(0);
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int dy = get_global_id(1);
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if (dx < dst_cols && dy < dst_rows)
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{
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CT X0 = M[0] * dx + M[1] * dy + M[2];
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CT Y0 = M[3] * dx + M[4] * dy + M[5];
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CT W = M[6] * dx + M[7] * dy + M[8];
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W = W != 0.0f ? INTER_TAB_SIZE / W : 0.0f;
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int X = rint(X0 * W), Y = rint(Y0 * W);
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short sx = convert_short_sat(X >> INTER_BITS);
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short sy = convert_short_sat(Y >> INTER_BITS);
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short ay = (short)(Y & (INTER_TAB_SIZE - 1));
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short ax = (short)(X & (INTER_TAB_SIZE - 1));
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WT v0 = (sx >= 0 && sx < src_cols && sy >= 0 && sy < src_rows) ?
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convertToWT(*(__global const T *)(srcptr + mad24(sy, src_step, src_offset + sx * (int)sizeof(T)))) : scalar;
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WT v1 = (sx+1 >= 0 && sx+1 < src_cols && sy >= 0 && sy < src_rows) ?
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convertToWT(*(__global const T *)(srcptr + mad24(sy, src_step, src_offset + (sx+1) * (int)sizeof(T)))) : scalar;
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WT v2 = (sx >= 0 && sx < src_cols && sy+1 >= 0 && sy+1 < src_rows) ?
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convertToWT(*(__global const T *)(srcptr + mad24(sy+1, src_step, src_offset + sx * (int)sizeof(T)))) : scalar;
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WT v3 = (sx+1 >= 0 && sx+1 < src_cols && sy+1 >= 0 && sy+1 < src_rows) ?
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convertToWT(*(__global const T *)(srcptr + mad24(sy+1, src_step, src_offset + (sx+1) * (int)sizeof(T)))) : scalar;
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float taby = 1.f/INTER_TAB_SIZE*ay;
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float tabx = 1.f/INTER_TAB_SIZE*ax;
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int dst_index = mad24(dy, dst_step, dst_offset + dx * (int)sizeof(T));
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__global T * dst = (__global T *)(dstptr + dst_index);
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#if depth <= 4
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int itab0 = convert_short_sat_rte( (1.0f-taby)*(1.0f-tabx) * INTER_REMAP_COEF_SCALE );
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int itab1 = convert_short_sat_rte( (1.0f-taby)*tabx * INTER_REMAP_COEF_SCALE );
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int itab2 = convert_short_sat_rte( taby*(1.0f-tabx) * INTER_REMAP_COEF_SCALE );
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int itab3 = convert_short_sat_rte( taby*tabx * INTER_REMAP_COEF_SCALE );
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WT val = v0 * itab0 + v1 * itab1 + v2 * itab2 + v3 * itab3;
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dst[0] = convertToT((val + (1 << (INTER_REMAP_COEF_BITS-1))) >> INTER_REMAP_COEF_BITS);
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#else
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float tabx2 = 1.0f - tabx, taby2 = 1.0f - taby;
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WT val = v0 * tabx2 * taby2 + v1 * tabx * taby2 + v2 * tabx2 * taby + v3 * tabx * taby;
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dst[0] = convertToT(val);
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#endif
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}
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}
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#elif defined INTER_CUBIC
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inline void interpolateCubic( float x, float* coeffs )
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{
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const float A = -0.75f;
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coeffs[0] = ((A*(x + 1.f) - 5.0f*A)*(x + 1.f) + 8.0f*A)*(x + 1.f) - 4.0f*A;
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coeffs[1] = ((A + 2.f)*x - (A + 3.f))*x*x + 1.f;
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coeffs[2] = ((A + 2.f)*(1.f - x) - (A + 3.f))*(1.f - x)*(1.f - x) + 1.f;
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coeffs[3] = 1.f - coeffs[0] - coeffs[1] - coeffs[2];
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}
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__kernel void warpPerspective(__global const uchar * srcptr, int src_step, int src_offset, int src_rows, int src_cols,
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__global uchar * dstptr, int dst_step, int dst_offset, int dst_rows, int dst_cols,
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__constant CT * M, WT scalar)
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{
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int dx = get_global_id(0);
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int dy = get_global_id(1);
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if (dx < dst_cols && dy < dst_rows)
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{
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CT X0 = M[0] * dx + M[1] * dy + M[2];
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CT Y0 = M[3] * dx + M[4] * dy + M[5];
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CT W = M[6] * dx + M[7] * dy + M[8];
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W = W != 0.0f ? INTER_TAB_SIZE / W : 0.0f;
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int X = rint(X0 * W), Y = rint(Y0 * W);
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short sx = convert_short_sat(X >> INTER_BITS) - 1;
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short sy = convert_short_sat(Y >> INTER_BITS) - 1;
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short ay = (short)(Y & (INTER_TAB_SIZE-1));
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short ax = (short)(X & (INTER_TAB_SIZE-1));
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WT v[16];
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#pragma unroll
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for (int y = 0; y < 4; y++)
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#pragma unroll
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for (int x = 0; x < 4; x++)
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v[mad24(y, 4, x)] = (sx+x >= 0 && sx+x < src_cols && sy+y >= 0 && sy+y < src_rows) ?
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convertToWT(*(__global const T *)(srcptr + mad24(sy+y, src_step, src_offset + (sx+x) * (int)sizeof(T)))) : scalar;
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float tab1y[4], tab1x[4];
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float ayy = INTER_SCALE * ay;
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float axx = INTER_SCALE * ax;
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interpolateCubic(ayy, tab1y);
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interpolateCubic(axx, tab1x);
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int dst_index = mad24(dy, dst_step, dst_offset + dx * (int)sizeof(T));
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__global T * dst = (__global T *)(dstptr + dst_index);
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WT sum = (WT)(0);
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#if depth <= 4
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int itab[16];
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#pragma unroll
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for (int i = 0; i < 16; i++)
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itab[i] = rint(tab1y[(i>>2)] * tab1x[(i&3)] * INTER_REMAP_COEF_SCALE);
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#pragma unroll
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for (int i = 0; i < 16; i++)
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sum += v[i] * itab[i];
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dst[0] = convertToT( (sum + (1 << (INTER_REMAP_COEF_BITS-1))) >> INTER_REMAP_COEF_BITS );
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#else
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#pragma unroll
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for (int i = 0; i < 16; i++)
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sum += v[i] * tab1y[(i>>2)] * tab1x[(i&3)];
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dst[0] = convertToT( sum );
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#endif
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}
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}
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#endif
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