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Small optimization for buildMaps kernels in case rowsPerWI > 1

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This commit is contained in:
Alexander Karsakov 2014-10-22 17:43:29 +03:00
parent 54b59c3cfb
commit 62d4393883
2 changed files with 20 additions and 25 deletions
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39
modules/stitching/src/opencl/warpers.cl
View File

@ -56,19 +56,19 @@ __kernel void buildWarpPlaneMaps(__global uchar * xmapptr, int xmap_step, int xm
int xmap_index = mad24(dv0, xmap_step, mad24(du, (int)sizeof(float), xmap_offset));
int ymap_index = mad24(dv0, ymap_step, mad24(du, (int)sizeof(float), ymap_offset));
float u = tl_u + du;
float x_ = u * scale - ct[0];
float ct1 = 1 - ct[2];
for (int dv = dv0, dv1 = min(rows, dv0 + rowsPerWI); dv < dv1; ++dv, xmap_index += xmap_step,
ymap_index += ymap_step)
{
__global float * xmap = (__global float *)(xmapptr + xmap_index);
__global float * ymap = (__global float *)(ymapptr + ymap_index);
float u = tl_u + du;
float v = tl_v + dv;
float y_ = v * scale - ct[1];
float x_ = u / scale - ct[0];
float y_ = v / scale - ct[1];
float ct1 = 1 - ct[2];
float x = fma(ck_rinv[0], x_, fma(ck_rinv[1], y_, ck_rinv[2] * ct1));
float y = fma(ck_rinv[3], x_, fma(ck_rinv[4], y_, ck_rinv[5] * ct1));
float z = fma(ck_rinv[6], x_, fma(ck_rinv[7], y_, ck_rinv[8] * ct1));
@ -94,22 +94,19 @@ __kernel void buildWarpCylindricalMaps(__global uchar * xmapptr, int xmap_step,
int xmap_index = mad24(dv0, xmap_step, mad24(du, (int)sizeof(float), xmap_offset));
int ymap_index = mad24(dv0, ymap_step, mad24(du, (int)sizeof(float), ymap_offset));
float u = (tl_u + du) * scale;
float x_, z_;
x_ = sincos(u, &z_);
for (int dv = dv0, dv1 = min(rows, dv0 + rowsPerWI); dv < dv1; ++dv, xmap_index += xmap_step,
ymap_index += ymap_step)
{
__global float * xmap = (__global float *)(xmapptr + xmap_index);
__global float * ymap = (__global float *)(ymapptr + ymap_index);
float u = tl_u + du;
float v = tl_v + dv;
float x, y;
float y_ = (tl_v + dv) * scale;
u /= scale;
float x_, y_, z_;
x_ = sincos(u, &z_);
y_ = v / scale;
float z;
float x, y, z;
x = fma(ck_rinv[0], x_, fma(ck_rinv[1], y_, ck_rinv[2] * z_));
y = fma(ck_rinv[3], x_, fma(ck_rinv[4], y_, ck_rinv[5] * z_));
z = fma(ck_rinv[6], x_, fma(ck_rinv[7], y_, ck_rinv[8] * z_));
@ -137,25 +134,23 @@ __kernel void buildWarpSphericalMaps(__global uchar * xmapptr, int xmap_step, in
int xmap_index = mad24(dv0, xmap_step, mad24(du, (int)sizeof(float), xmap_offset));
int ymap_index = mad24(dv0, ymap_step, mad24(du, (int)sizeof(float), ymap_offset));
float u = (tl_u + du) * scale;
float cosu, sinu = sincos(u, &cosu);
for (int dv = dv0, dv1 = min(rows, dv0 + rowsPerWI); dv < dv1; ++dv, xmap_index += xmap_step,
ymap_index += ymap_step)
{
__global float * xmap = (__global float *)(xmapptr + xmap_index);
__global float * ymap = (__global float *)(ymapptr + ymap_index);
float u = tl_u + du;
float v = tl_v + dv;
float x, y;
float v = (tl_v + dv) * scale;
v /= scale;
u /= scale;
float cosv, sinv = sincos(v, &cosv), cosu, sinu = sincos(u, &cosu);
float cosv, sinv = sincos(v, &cosv);
float x_ = sinv * sinu;
float y_ = -cosv;
float z_ = sinv * cosu;
float z;
float x, y, z;
x = fma(ck_rinv[0], x_, fma(ck_rinv[1], y_, ck_rinv[2] * z_));
y = fma(ck_rinv[3], x_, fma(ck_rinv[4], y_, ck_rinv[5] * z_));
z = fma(ck_rinv[6], x_, fma(ck_rinv[7], y_, ck_rinv[8] * z_));

6
modules/stitching/src/warpers.cpp
View File

@ -110,7 +110,7 @@ Rect PlaneWarper::buildMaps(Size src_size, InputArray K, InputArray R, InputArra
k.args(ocl::KernelArg::WriteOnlyNoSize(uxmap), ocl::KernelArg::WriteOnly(uymap),
ocl::KernelArg::PtrReadOnly(uk_rinv), ocl::KernelArg::PtrReadOnly(ut),
dst_tl.x, dst_tl.y, projector_.scale, rowsPerWI);
dst_tl.x, dst_tl.y, 1/projector_.scale, rowsPerWI);
size_t globalsize[2] = { dsize.width, (dsize.height + rowsPerWI - 1) / rowsPerWI };
if (k.run(2, globalsize, NULL, true))
@ -388,7 +388,7 @@ Rect SphericalWarper::buildMaps(Size src_size, InputArray K, InputArray R, Outpu
UMat uxmap = xmap.getUMat(), uymap = ymap.getUMat(), uk_rinv = k_rinv.getUMat(ACCESS_READ);
k.args(ocl::KernelArg::WriteOnlyNoSize(uxmap), ocl::KernelArg::WriteOnly(uymap),
ocl::KernelArg::PtrReadOnly(uk_rinv), dst_tl.x, dst_tl.y, projector_.scale, rowsPerWI);
ocl::KernelArg::PtrReadOnly(uk_rinv), dst_tl.x, dst_tl.y, 1/projector_.scale, rowsPerWI);
size_t globalsize[2] = { dsize.width, (dsize.height + rowsPerWI - 1) / rowsPerWI };
if (k.run(2, globalsize, NULL, true))
@ -436,7 +436,7 @@ Rect CylindricalWarper::buildMaps(Size src_size, InputArray K, InputArray R, Out
UMat uxmap = xmap.getUMat(), uymap = ymap.getUMat(), uk_rinv = k_rinv.getUMat(ACCESS_READ);
k.args(ocl::KernelArg::WriteOnlyNoSize(uxmap), ocl::KernelArg::WriteOnly(uymap),
ocl::KernelArg::PtrReadOnly(uk_rinv), dst_tl.x, dst_tl.y, projector_.scale,
ocl::KernelArg::PtrReadOnly(uk_rinv), dst_tl.x, dst_tl.y, 1/projector_.scale,
rowsPerWI);
size_t globalsize[2] = { dsize.width, (dsize.height + rowsPerWI - 1) / rowsPerWI };