text: // This file is auto-generated. Do not edit!
  
  #include "precomp.hpp"
  #include "cvconfig.h"
  #include "opencl_kernels_calib3d.hpp"
  
  #ifdef HAVE_OPENCL
  
  namespace cv
  {
  namespace ocl
  {
  namespace calib3d
  {
  
  static const char* const moduleName = "calib3d";
  
  struct cv::ocl::internal::ProgramEntry stereobm_oclsrc={moduleName, "stereobm",
  "#define MAX_VAL 32767\n"
  "#ifndef WSZ\n"
  "#define WSZ     2\n"
  "#endif\n"
  "#define WSZ2    (WSZ / 2)\n"
  "#ifdef DEFINE_KERNEL_STEREOBM\n"
  "#define DISPARITY_SHIFT     4\n"
  "#define FILTERED            ((MIN_DISP - 1) << DISPARITY_SHIFT)\n"
  "void calcDisp(__local short * cost, __global short * disp, int uniquenessRatio,\n"
  "__local int * bestDisp, __local int * bestCost, int d, int x, int y, int cols, int rows)\n"
  "{\n"
  "int best_disp = *bestDisp, best_cost = *bestCost;\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "short c = cost[0];\n"
  "int thresh = best_cost + (best_cost * uniquenessRatio / 100);\n"
  "bool notUniq = ( (c <= thresh) && (d < (best_disp - 1) || d > (best_disp + 1) ) );\n"
  "if (notUniq)\n"
  "*bestCost = FILTERED;\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "if( *bestCost != FILTERED && x < cols - WSZ2 - MIN_DISP && y < rows - WSZ2 && d == best_disp)\n"
  "{\n"
  "int d_aprox = 0;\n"
  "int yp =0, yn = 0;\n"
  "if ((0 < best_disp) && (best_disp < NUM_DISP - 1))\n"
  "{\n"
  "yp = cost[-2 * BLOCK_SIZE_Y];\n"
  "yn = cost[2 * BLOCK_SIZE_Y];\n"
  "d_aprox = yp + yn - 2 * c + abs(yp - yn);\n"
  "}\n"
  "disp[0] = (short)(((best_disp + MIN_DISP)*256 + (d_aprox != 0 ? (yp - yn) * 256 / d_aprox : 0) + 15) >> 4);\n"
  "}\n"
  "}\n"
  "short calcCostBorder(__global const uchar * leftptr, __global const uchar * rightptr, int x, int y, int nthread,\n"
  "short * costbuf, int *h, int cols, int d, short cost)\n"
  "{\n"
  "int head = (*h) % WSZ;\n"
  "__global const uchar * left, * right;\n"
  "int idx = mad24(y + WSZ2 * (2 * nthread - 1), cols, x + WSZ2 * (1 - 2 * nthread));\n"
  "left = leftptr + idx;\n"
  "right = rightptr + (idx - d);\n"
  "short costdiff = 0;\n"
  "if (0 == nthread)\n"
  "{\n"
  "#pragma unroll\n"
  "for (int i = 0; i < WSZ; i++)\n"
  "{\n"
  "costdiff += abs( left[0] - right[0] );\n"
  "left += cols;\n"
  "right += cols;\n"
  "}\n"
  "}\n"
  "else\n"
  "{\n"
  "#pragma unroll\n"
  "for (int i = 0; i < WSZ; i++)\n"
  "{\n"
  "costdiff += abs(left[i] - right[i]);\n"
  "}\n"
  "}\n"
  "cost += costdiff - costbuf[head];\n"
  "costbuf[head] = costdiff;\n"
  "*h = head + 1;\n"
  "return cost;\n"
  "}\n"
  "short calcCostInside(__global const uchar * leftptr, __global const uchar * rightptr, int x, int y,\n"
  "int cols, int d, short cost_up_left, short cost_up, short cost_left)\n"
  "{\n"
  "__global const uchar * left, * right;\n"
  "int idx = mad24(y - WSZ2 - 1, cols, x - WSZ2 - 1);\n"
  "left = leftptr + idx;\n"
  "right = rightptr + (idx - d);\n"
  "int idx2 = WSZ*cols;\n"
  "uchar corrner1 = abs(left[0] - right[0]),\n"
  "corrner2 = abs(left[WSZ] - right[WSZ]),\n"
  "corrner3 = abs(left[idx2] - right[idx2]),\n"
  "corrner4 = abs(left[idx2 + WSZ] - right[idx2 + WSZ]);\n"
  "return cost_up + cost_left - cost_up_left + corrner1 -\n"
  "corrner2 - corrner3 + corrner4;\n"
  "}\n"
  "__kernel void stereoBM(__global const uchar * leftptr,\n"
  "__global const uchar * rightptr,\n"
  "__global uchar * dispptr, int disp_step, int disp_offset,\n"
  "int rows, int cols,\n"
  "int textureTreshold, int uniquenessRatio)\n"
  "{\n"
  "int lz = get_local_id(0);\n"
  "int gx = get_global_id(1) * BLOCK_SIZE_X;\n"
  "int gy = get_global_id(2) * BLOCK_SIZE_Y;\n"
  "int nthread = lz / NUM_DISP;\n"
  "int disp_idx = lz % NUM_DISP;\n"
  "__global short * disp;\n"
  "__global const uchar * left, * right;\n"
  "__local short costFunc[2 * BLOCK_SIZE_Y * NUM_DISP];\n"
  "__local short * cost;\n"
  "__local int best_disp[2];\n"
  "__local int best_cost[2];\n"
  "best_cost[nthread] = MAX_VAL;\n"
  "best_disp[nthread] = -1;\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "short costbuf[WSZ];\n"
  "int head = 0;\n"
  "int shiftX = WSZ2 + NUM_DISP + MIN_DISP - 1;\n"
  "int shiftY = WSZ2;\n"
  "int x = gx + shiftX, y = gy + shiftY, lx = 0, ly = 0;\n"
  "int costIdx = disp_idx * 2 * BLOCK_SIZE_Y + (BLOCK_SIZE_Y - 1);\n"
  "cost = costFunc + costIdx;\n"
  "int tempcost = 0;\n"
  "if (x < cols - WSZ2 - MIN_DISP && y < rows - WSZ2)\n"
  "{\n"
  "if (0 == nthread)\n"
  "{\n"
  "#pragma unroll\n"
  "for (int i = 0; i < WSZ; i++)\n"
  "{\n"
  "int idx = mad24(y - WSZ2, cols, x - WSZ2 + i);\n"
  "left = leftptr + idx;\n"
  "right = rightptr + (idx - disp_idx);\n"
  "short costdiff = 0;\n"
  "for(int j = 0; j < WSZ; j++)\n"
  "{\n"
  "costdiff += abs( left[0] - right[0] );\n"
  "left += cols;\n"
  "right += cols;\n"
  "}\n"
  "costbuf[i] = costdiff;\n"
  "}\n"
  "}\n"
  "else\n"
  "{\n"
  "#pragma unroll\n"
  "for (int i = 0; i < WSZ; i++)\n"
  "{\n"
  "int idx = mad24(y - WSZ2 + i, cols, x - WSZ2);\n"
  "left = leftptr + idx;\n"
  "right = rightptr + (idx - disp_idx);\n"
  "short costdiff = 0;\n"
  "for (int j = 0; j < WSZ; j++)\n"
  "{\n"
  "costdiff += abs( left[j] - right[j]);\n"
  "}\n"
  "tempcost += costdiff;\n"
  "costbuf[i] = costdiff;\n"
  "}\n"
  "}\n"
  "}\n"
  "if (nthread == 1)\n"
  "{\n"
  "cost[0] = tempcost;\n"
  "atomic_min(best_cost + 1, tempcost);\n"
  "}\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "if (best_cost[1] == tempcost)\n"
  "atomic_max(best_disp + 1, disp_idx);\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "int dispIdx = mad24(gy, disp_step, mad24((int)sizeof(short), gx, disp_offset));\n"
  "disp = (__global short *)(dispptr + dispIdx);\n"
  "calcDisp(cost, disp, uniquenessRatio, best_disp + 1, best_cost + 1, disp_idx, x, y, cols, rows);\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "lx = 1 - nthread;\n"
  "ly = nthread;\n"
  "for (int i = 0; i < BLOCK_SIZE_Y * BLOCK_SIZE_X / 2; i++)\n"
  "{\n"
  "x = (lx < BLOCK_SIZE_X) ? gx + shiftX + lx : cols;\n"
  "y = (ly < BLOCK_SIZE_Y) ? gy + shiftY + ly : rows;\n"
  "best_cost[nthread] = MAX_VAL;\n"
  "best_disp[nthread] = -1;\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "costIdx = mad24(2 * BLOCK_SIZE_Y, disp_idx, (BLOCK_SIZE_Y - 1 - ly + lx));\n"
  "if (0 > costIdx)\n"
  "costIdx = BLOCK_SIZE_Y - 1;\n"
  "cost = costFunc + costIdx;\n"
  "if (x < cols - WSZ2 - MIN_DISP && y < rows - WSZ2)\n"
  "{\n"
  "tempcost = (ly * (1 - nthread) + lx * nthread == 0) ?\n"
  "calcCostBorder(leftptr, rightptr, x, y, nthread, costbuf, &head, cols, disp_idx, cost[2*nthread-1]) :\n"
  "calcCostInside(leftptr, rightptr, x, y, cols, disp_idx, cost[0], cost[1], cost[-1]);\n"
  "}\n"
  "cost[0] = tempcost;\n"
  "atomic_min(best_cost + nthread, tempcost);\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "if (best_cost[nthread] == tempcost)\n"
  "atomic_max(best_disp + nthread, disp_idx);\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "dispIdx = mad24(gy + ly, disp_step, mad24((int)sizeof(short), (gx + lx), disp_offset));\n"
  "disp = (__global short *)(dispptr + dispIdx);\n"
  "calcDisp(cost, disp, uniquenessRatio, best_disp + nthread, best_cost + nthread, disp_idx, x, y, cols, rows);\n"
  "barrier(CLK_LOCAL_MEM_FENCE);\n"
  "if (lx + nthread - 1 == ly)\n"
  "{\n"
  "lx = (lx + nthread + 1) * (1 - nthread);\n"
  "ly = (ly + 1) * nthread;\n"
  "}\n"
  "else\n"
  "{\n"
  "lx += nthread;\n"
  "ly = ly - nthread + 1;\n"
  "}\n"
  "}\n"
  "}\n"
  "#endif\n"
  "__kernel void prefilter_norm(__global unsigned char *input, __global unsigned char *output,\n"
  "int rows, int cols, int prefilterCap, int scale_g, int scale_s)\n"
  "{\n"
  "int x = get_global_id(0);\n"
  "int y = get_global_id(1);\n"
  "if(x < cols && y < rows)\n"
  "{\n"
  "int cov1 =                                   input[   max(y-1, 0)   * cols + x] * 1 +\n"
  "input[y * cols + max(x-1,0)] * 1 + input[      y          * cols + x] * 4 + input[y * cols + min(x+1, cols-1)] * 1 +\n"
  "input[min(y+1, rows-1) * cols + x] * 1;\n"
  "int cov2 = 0;\n"
  "for(int i = -WSZ2; i < WSZ2+1; i++)\n"
  "for(int j = -WSZ2; j < WSZ2+1; j++)\n"
  "cov2 += input[clamp(y+i, 0, rows-1) * cols + clamp(x+j, 0, cols-1)];\n"
  "int res = (cov1*scale_g - cov2*scale_s)>>10;\n"
  "res = clamp(res, -prefilterCap, prefilterCap) + prefilterCap;\n"
  "output[y * cols + x] = res;\n"
  "}\n"
  "}\n"
  "__kernel void prefilter_xsobel(__global unsigned char *input, __global unsigned char *output,\n"
  "int rows, int cols, int prefilterCap)\n"
  "{\n"
  "int x = get_global_id(0);\n"
  "int y = get_global_id(1);\n"
  "if(x < cols && y < rows)\n"
  "{\n"
  "if (0 < x && !((y == rows-1) & (rows%2==1) ) )\n"
  "{\n"
  "int cov = input[ ((y > 0) ? y-1 : y+1)  * cols + (x-1)] * (-1) + input[ ((y > 0) ? y-1 : y+1)  * cols + ((x<cols-1) ? x+1 : x-1)] * (1) +\n"
  "input[              (y)       * cols + (x-1)] * (-2) + input[        (y)             * cols + ((x<cols-1) ? x+1 : x-1)] * (2) +\n"
  "input[((y<rows-1)?(y+1):(y-1))* cols + (x-1)] * (-1) + input[((y<rows-1)?(y+1):(y-1))* cols + ((x<cols-1) ? x+1 : x-1)] * (1);\n"
  "cov = clamp(cov, -prefilterCap, prefilterCap) + prefilterCap;\n"
  "output[y * cols + x] = cov;\n"
  "}\n"
  "else\n"
  "output[y * cols + x] = prefilterCap;\n"
  "}\n"
  "}\n"
  , "8ede5990f0c9582639e5bef29cfd6cf9", NULL};
  
  }}}
  #endif
  