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Optimize OpenCL LUT function

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This commit is contained in:
vbystricky 2014-05-15 13:08:17 +04:00
parent ab2749d648
commit 47b092e527
2 changed files with 143 additions and 13 deletions
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27
modules/core/src/convert.cpp
View File

@ -1544,22 +1544,33 @@ static LUTFunc lutTab[] =
static bool ocl_LUT(InputArray _src, InputArray _lut, OutputArray _dst)
{
int lcn = _lut.channels(), dcn = _src.channels(), ddepth = _lut.depth();
int sdepth = _src.depth();
UMat src = _src.getUMat(), lut = _lut.getUMat();
_dst.create(src.size(), CV_MAKETYPE(ddepth, dcn));
int dtype = CV_MAKETYPE(ddepth, dcn);
_dst.create(src.size(), dtype);
UMat dst = _dst.getUMat();
ocl::Kernel k("LUT", ocl::core::lut_oclsrc,
format("-D dcn=%d -D lcn=%d -D srcT=%s -D dstT=%s", dcn, lcn,
ocl::typeToStr(src.depth()), ocl::memopTypeToStr(ddepth)));
if (k.empty())
size_t globalSize[2] = { dst.cols, dst.rows / 2};
cv::String build_opt = format("-D dcn=%d -D lcn=%d -D srcT=%s -D dstT=%s", dcn, lcn,
ocl::typeToStr(sdepth), ocl::memopTypeToStr(ddepth)
);
ocl::Kernel kernel;
if ((4 == lcn) && (CV_8U == sdepth))
kernel.create("LUTC4", ocl::core::lut_oclsrc, build_opt);
else if ((3 == lcn) && (CV_8U == sdepth))
kernel.create("LUTC3", ocl::core::lut_oclsrc, build_opt);
else
kernel.create("LUT", ocl::core::lut_oclsrc, build_opt);
if (kernel.empty())
return false;
k.args(ocl::KernelArg::ReadOnlyNoSize(src), ocl::KernelArg::ReadOnlyNoSize(lut),
kernel.args(ocl::KernelArg::ReadOnlyNoSize(src), ocl::KernelArg::ReadOnlyNoSize(lut),
ocl::KernelArg::WriteOnly(dst));
size_t globalSize[2] = { dst.cols, dst.rows };
return k.run(2, globalSize, NULL, false);
return kernel.run(2, globalSize, NULL, true);
}
#endif

129
modules/core/src/opencl/lut.cl
View File

@ -34,30 +34,149 @@
//
//
__kernel void LUT(__global const uchar * srcptr, int src_step, int src_offset,
__kernel void LUTC4(__global const uchar * srcptr, int src_step, int src_offset,
__global const uchar * lutptr, int lut_step, int lut_offset,
__global uchar * dstptr, int dst_step, int dst_offset, int rows, int cols)
{
int x = get_global_id(0);
int y = get_global_id(1);
int y = 2 * get_global_id(1);
__global const dstT * lut = (__global const dstT *)(lutptr + lut_offset);
__local dstT lut_l[256 * lcn];
int init = mad24(get_local_id(1), get_local_size(0), get_local_id(0));
int step = get_local_size(0) * get_local_size(1);
for (int i = init; i < 256 * lcn; i += step)
{
lut_l[i + 0] = lut[i + 0];
}
barrier(CLK_LOCAL_MEM_FENCE);
if (x < cols && y < rows)
{
int src_index = mad24(y, src_step, mad24(x, (int)sizeof(srcT) * dcn, src_offset));
int dst_index = mad24(y, dst_step, mad24(x, (int)sizeof(dstT) * dcn, dst_offset));
__global const uchar4 * src = (__global const uchar4 *)(srcptr + src_index);
int4 idx = convert_int4(src[0]) * lcn + (int4)(0, 1, 2, 3);
__global dstT * dst = (__global dstT *)(dstptr + dst_index);
dst[0] = lut_l[idx.x];
dst[1] = lut_l[idx.y];
dst[2] = lut_l[idx.z];
dst[3] = lut_l[idx.w];
if (y < rows - 1)
{
src = (__global const uchar4 *)(srcptr + src_index + src_step);
idx = convert_int4(src[0]) * lcn + (int4)(0, 1, 2, 3);
dst = (__global dstT *)(dstptr + dst_index + dst_step);
dst[0] = lut_l[idx.x];
dst[1] = lut_l[idx.y];
dst[2] = lut_l[idx.z];
dst[3] = lut_l[idx.w];
}
}
}
__kernel void LUTC3(__global const uchar * srcptr, int src_step, int src_offset,
__global const uchar * lutptr, int lut_step, int lut_offset,
__global uchar * dstptr, int dst_step, int dst_offset, int rows, int cols)
{
int x = get_global_id(0);
int y = 2 * get_global_id(1);
__global const dstT * lut = (__global const dstT *)(lutptr + lut_offset);
__local dstT lut_l[256 * lcn];
int init = mad24(get_local_id(1), get_local_size(0), get_local_id(0));
int step = get_local_size(0) * get_local_size(1);
for (int i = init; i < 256 * lcn; i += step)
{
lut_l[i + 0] = lut[i + 0];
}
barrier(CLK_LOCAL_MEM_FENCE);
if (x < cols && y < rows)
{
int src_index = mad24(y, src_step, mad24(x, (int)sizeof(srcT) * dcn, src_offset));
int dst_index = mad24(y, dst_step, mad24(x, (int)sizeof(dstT) * dcn, dst_offset));
uchar3 src_pixel = vload3(0, (__global const uchar *)(srcptr + src_index));
int3 idx = convert_int3(src_pixel) * lcn + (int3)(0, 1, 2);
__global dstT * dst = (__global dstT *)(dstptr + dst_index);
dst[0] = lut_l[idx.x];
dst[1] = lut_l[idx.y];
dst[2] = lut_l[idx.z];
if (y < rows - 1)
{
uchar3 src_pixel = vload3(0, (__global const uchar *)(srcptr + src_index + src_step));
idx = convert_int3(src_pixel) * lcn + (int3)(0, 1, 2);
dst = (__global dstT *)(dstptr + dst_index + dst_step);
dst[0] = lut_l[idx.x];
dst[1] = lut_l[idx.y];
dst[2] = lut_l[idx.z];
}
}
}
__kernel void LUT(__global const uchar * srcptr, int src_step, int src_offset,
__global const uchar * lutptr, int lut_step, int lut_offset,
__global uchar * dstptr, int dst_step, int dst_offset, int rows, int cols)
{
__global const dstT * lut = (__global const dstT *)(lutptr + lut_offset);
__local dstT lut_l[256 * lcn];
int init = mad24(get_local_id(1), get_local_size(0), get_local_id(0));
int step = get_local_size(0) * get_local_size(1);
for (int i = init; i < 256 * lcn; i += step)
{
lut_l[i + 0] = lut[i + 0];
}
barrier(CLK_LOCAL_MEM_FENCE);
int x = get_global_id(0);
int y = 2 * get_global_id(1);
if (x < cols && y < rows)
{
int src_index = mad24(y, src_step, mad24(x, (int)sizeof(srcT) * dcn, src_offset));
__global const srcT * src = (__global const srcT *)(srcptr + src_index);
__global const dstT * lut = (__global const dstT *)(lutptr + lut_offset);
int dst_index = mad24(y, dst_step, mad24(x, (int)sizeof(dstT) * dcn, dst_offset));
__global dstT * dst = (__global dstT *)(dstptr + dst_index);
#if lcn == 1
#pragma unroll
for (int cn = 0; cn < dcn; ++cn)
dst[cn] = lut[src[cn]];
#else
dst[cn] = lut_l[src[cn]];
#else //lcn == scn == dcn
#pragma unroll
for (int cn = 0; cn < dcn; ++cn)
dst[cn] = lut[mad24(src[cn], dcn, cn)];
dst[cn] = lut_l[mad24(src[cn], lcn, cn)];
#endif
if (y < rows - 1)
{
src = (__global const srcT *)(srcptr + src_index + src_step);
dst = (__global dstT *)(dstptr + dst_index + dst_step);
#if lcn == 1
#pragma unroll
for (int cn = 0; cn < dcn; ++cn)
dst[cn] = lut_l[src[cn]];
#else //lcn == scn == dcn
#pragma unroll
for (int cn = 0; cn < dcn; ++cn)
dst[cn] = lut_l[mad24(src[cn], lcn, cn)];
#endif
}
}
}