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Optimize OpenCL version of sepFilter2D

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This commit is contained in:
vbystricky 2014-06-26 12:46:03 +04:00
parent d4f938ed56
commit 730ead44fe
2 changed files with 59 additions and 33 deletions
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2
modules/imgproc/src/filter.cpp
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@ -3492,7 +3492,7 @@ static bool ocl_sepFilter2D_SinglePass(InputArray _src, OutputArray _dst,
return false;
size_t lt2[2] = { optimizedSepFilterLocalSize, optimizedSepFilterLocalSize };
size_t gt2[2] = { lt2[0] * (1 + (size.width - 1) / lt2[0]), lt2[1] * (1 + (size.height - 1) / lt2[1]) };
size_t gt2[2] = { lt2[0] * (1 + (size.width - 1) / lt2[0]), optimizedSepFilterLocalSize};
char cvt[2][40];
const char * const borderMap[] = { "BORDER_CONSTANT", "BORDER_REPLICATE", "BORDER_REFLECT", "BORDER_WRAP",

90
modules/imgproc/src/opencl/filterSep_singlePass.cl
View File

@ -119,17 +119,15 @@ __kernel void sep_filter(__global uchar* Src, int src_step, int srcOffsetX, int
int liy = get_local_id(1);
int x = get_global_id(0);
int y = get_global_id(1);
// calculate pixel position in source image taking image offset into account
int srcX = x + srcOffsetX - RADIUSX;
int srcY = y + srcOffsetY - RADIUSY;
// extrapolate coordinates, if needed
// and read my own source pixel into local memory
// with account for extra border pixels, which will be read by starting workitems
int clocY = liy;
int cSrcY = srcY;
int cSrcY = liy + srcOffsetY - RADIUSY;
do
{
int yb = cSrcY;
@ -154,48 +152,76 @@ __kernel void sep_filter(__global uchar* Src, int src_step, int srcOffsetX, int
while (clocY < BLK_Y+(RADIUSY*2));
barrier(CLK_LOCAL_MEM_FENCE);
// do vertical filter pass
// and store intermediate results to second local memory array
int i, clocX = lix;
WT sum = (WT) 0;
do
for (int y = 0; y < dst_rows; y+=BLK_Y)
{
sum = (WT) 0;
for (i=0; i<=2*RADIUSY; i++)
// do vertical filter pass
// and store intermediate results to second local memory array
int i, clocX = lix;
WT sum = (WT) 0;
do
{
sum = (WT) 0;
for (i=0; i<=2*RADIUSY; i++)
#if (defined(INTEGER_ARITHMETIC) && !INTEL_DEVICE)
sum = mad24(lsmem[liy+i][clocX], mat_kernelY[i], sum);
sum = mad24(lsmem[liy + i][clocX], mat_kernelY[i], sum);
#else
sum = mad(lsmem[liy+i][clocX], mat_kernelY[i], sum);
sum = mad(lsmem[liy + i][clocX], mat_kernelY[i], sum);
#endif
lsmemDy[liy][clocX] = sum;
clocX += BLK_X;
}
while(clocX < BLK_X+(RADIUSX*2));
barrier(CLK_LOCAL_MEM_FENCE);
lsmemDy[liy][clocX] = sum;
clocX += BLK_X;
}
while(clocX < BLK_X+(RADIUSX*2));
barrier(CLK_LOCAL_MEM_FENCE);
// if this pixel happened to be out of image borders because of global size rounding,
// then just return
if( x >= dst_cols || y >=dst_rows )
return;
// do second horizontal filter pass
// and calculate final result
sum = 0.0f;
for (i=0; i<=2*RADIUSX; i++)
// if this pixel happened to be out of image borders because of global size rounding,
// then just return
if ((x < dst_cols) && (y + liy < dst_rows))
{
// do second horizontal filter pass
// and calculate final result
sum = 0.0f;
for (i=0; i<=2*RADIUSX; i++)
#if (defined(INTEGER_ARITHMETIC) && !INTEL_DEVICE)
sum = mad24(lsmemDy[liy][lix+i], mat_kernelX[i], sum);
sum = mad24(lsmemDy[liy][lix+i], mat_kernelX[i], sum);
#else
sum = mad(lsmemDy[liy][lix+i], mat_kernelX[i], sum);
sum = mad(lsmemDy[liy][lix+i], mat_kernelX[i], sum);
#endif
#ifdef INTEGER_ARITHMETIC
#ifdef INTEL_DEVICE
sum = (sum + (1 << (SHIFT_BITS-1))) / (1 << SHIFT_BITS);
sum = (sum + (1 << (SHIFT_BITS-1))) / (1 << SHIFT_BITS);
#else
sum = (sum + (1 << (SHIFT_BITS-1))) >> SHIFT_BITS;
sum = (sum + (1 << (SHIFT_BITS-1))) >> SHIFT_BITS;
#endif
#endif
// store result into destination image
storepix(convertToDstT(sum + (WT)(delta)), Dst + mad24(y + liy, dst_step, mad24(x, DSTSIZE, dst_offset)));
}
for (int i = liy * BLK_X + lix; i < (RADIUSY*2) * (BLK_X+(RADIUSX*2)); i += BLK_X * BLK_Y)
{
int clocX = i % (BLK_X+(RADIUSX*2));
int clocY = i / (BLK_X+(RADIUSX*2));
lsmem[clocY][clocX] = lsmem[clocY + BLK_Y][clocX];
}
barrier(CLK_LOCAL_MEM_FENCE);
int cSrcY = y + BLK_Y + liy + srcOffsetY + RADIUSY;
EXTRAPOLATE(cSrcY, (height));
clocX = lix;
int cSrcX = x + srcOffsetX - RADIUSX;
do
{
int xb = cSrcX;
EXTRAPOLATE(xb,(width));
lsmem[liy + 2*RADIUSY][clocX] = ELEM(xb, cSrcY, (width), (height), 0 );
clocX += BLK_X;
cSrcX += BLK_X;
}
while(clocX < BLK_X+(RADIUSX*2));
barrier(CLK_LOCAL_MEM_FENCE);
}
// store result into destination image
storepix(convertToDstT(sum + (WT)(delta)), Dst + mad24(y, dst_step, mad24(x, DSTSIZE, dst_offset)));
}