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/*******************************************************
* Copyright (c) 2014, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
********************************************************/
#include <approx.hpp>
#include <backend.hpp>
#include <common/ArrayInfo.hpp>
#include <common/err_common.hpp>
#include <handle.hpp>
#include <af/array.h>
#include <af/defines.h>
#include <af/signal.h>
using af::dim4;
using detail::approx1;
using detail::approx2;
using detail::cdouble;
using detail::cfloat;
namespace {
template<typename Ty, typename Tp>
inline void approx1(af_array *yo, const af_array yi, const af_array xo,
const int xdim, const Tp &xi_beg, const Tp &xi_step,
const af_interp_type method, const float offGrid) {
approx1<Ty>(getArray<Ty>(*yo), getArray<Ty>(yi), getArray<Tp>(xo), xdim,
xi_beg, xi_step, method, offGrid);
}
} // namespace
template<typename Ty, typename Tp>
inline void approx2(af_array *zo, const af_array zi, const af_array xo,
const int xdim, const Tp &xi_beg, const Tp &xi_step,
const af_array yo, const int ydim, const Tp &yi_beg,
const Tp &yi_step, const af_interp_type method,
const float offGrid) {
approx2<Ty>(getArray<Ty>(*zo), getArray<Ty>(zi), getArray<Tp>(xo), xdim,
xi_beg, xi_step, getArray<Tp>(yo), ydim, yi_beg, yi_step,
method, offGrid);
}
void af_approx1_common(af_array *yo, const af_array yi, const af_array xo,
const int xdim, const double xi_beg,
const double xi_step, const af_interp_type method,
const float offGrid, const bool allocate_yo) {
ARG_ASSERT(0, yo != 0); // *yo (the af_array) can be null, but not yo
ARG_ASSERT(1, yi != 0);
ARG_ASSERT(2, xo != 0);
const ArrayInfo &yi_info = getInfo(yi);
const ArrayInfo &xo_info = getInfo(xo);
const dim4 &yi_dims = yi_info.dims();
const dim4 &xo_dims = xo_info.dims();
dim4 yo_dims = yi_dims;
yo_dims[xdim] = xo_dims[xdim];
ARG_ASSERT(1, yi_info.isFloating()); // Only floating and complex types
ARG_ASSERT(2, xo_info.isRealFloating()); // Only floating types
ARG_ASSERT(1, yi_info.isSingle() ==
xo_info.isSingle()); // Must have same precision
ARG_ASSERT(1, yi_info.isDouble() ==
xo_info.isDouble()); // Must have same precision
ARG_ASSERT(3, xdim >= 0 && xdim < 4);
// POS should either be (x, 1, 1, 1) or (1, yi_dims[1], yi_dims[2],
// yi_dims[3])
if (xo_dims[xdim] != xo_dims.elements()) {
for (int i = 0; i < 4; i++) {
if (xdim != i) { DIM_ASSERT(2, xo_dims[i] == yi_dims[i]); }
}
}
ARG_ASSERT(5, xi_step != 0);
ARG_ASSERT(
6, (method == AF_INTERP_CUBIC || method == AF_INTERP_CUBIC_SPLINE ||
method == AF_INTERP_LINEAR || method == AF_INTERP_LINEAR_COSINE ||
method == AF_INTERP_LOWER || method == AF_INTERP_NEAREST));
if (yi_dims.ndims() == 0 || xo_dims.ndims() == 0) {
af_create_handle(yo, 0, nullptr, yi_info.getType());
return;
}
if (allocate_yo) { *yo = createHandle(yo_dims, yi_info.getType()); }
DIM_ASSERT(0, getInfo(*yo).dims() == yo_dims);
switch (yi_info.getType()) {
case f32:
approx1<float, float>(yo, yi, xo, xdim, xi_beg, xi_step, method,
offGrid);
break;
case f64:
approx1<double, double>(yo, yi, xo, xdim, xi_beg, xi_step, method,
offGrid);
break;
case c32:
approx1<cfloat, float>(yo, yi, xo, xdim, xi_beg, xi_step, method,
offGrid);
break;
case c64:
approx1<cdouble, double>(yo, yi, xo, xdim, xi_beg, xi_step, method,
offGrid);
break;
default: TYPE_ERROR(1, yi_info.getType());
}
}
af_err af_approx1_uniform(af_array *yo, const af_array yi, const af_array xo,
const int xdim, const double xi_beg,
const double xi_step, const af_interp_type method,
const float offGrid) {
try {
af_approx1_common(yo, yi, xo, xdim, xi_beg, xi_step, method, offGrid,
true);
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_approx1_uniform_v2(af_array *yo, const af_array yi, const af_array xo,
const int xdim, const double xi_beg,
const double xi_step, const af_interp_type method,
const float offGrid) {
try {
ARG_ASSERT(0, yo != 0); // need to dereference yo in next call
af_approx1_common(yo, yi, xo, xdim, xi_beg, xi_step, method, offGrid,
*yo == 0);
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_approx1(af_array *yo, const af_array yi, const af_array xo,
const af_interp_type method, const float offGrid) {
try {
af_approx1_common(yo, yi, xo, 0, 0.0, 1.0, method, offGrid, true);
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_approx1_v2(af_array *yo, const af_array yi, const af_array xo,
const af_interp_type method, const float offGrid) {
try {
ARG_ASSERT(0, yo != 0); // need to dereference yo in next call
af_approx1_common(yo, yi, xo, 0, 0.0, 1.0, method, offGrid, *yo == 0);
}
CATCHALL;
return AF_SUCCESS;
}
void af_approx2_common(af_array *zo, const af_array zi, const af_array xo,
const int xdim, const double xi_beg,
const double xi_step, const af_array yo, const int ydim,
const double yi_beg, const double yi_step,
const af_interp_type method, const float offGrid,
bool allocate_zo) {
ARG_ASSERT(0, zo != 0); // *zo (the af_array) can be null, but not zo
ARG_ASSERT(1, zi != 0);
ARG_ASSERT(2, xo != 0);
ARG_ASSERT(6, yo != 0);
const ArrayInfo &zi_info = getInfo(zi);
const ArrayInfo &xo_info = getInfo(xo);
const ArrayInfo &yo_info = getInfo(yo);
dim4 zi_dims = zi_info.dims();
dim4 xo_dims = xo_info.dims();
dim4 yo_dims = yo_info.dims();
ARG_ASSERT(1, zi_info.isFloating()); // Only floating and complex types
ARG_ASSERT(2, xo_info.isRealFloating()); // Only floating types
ARG_ASSERT(4, yo_info.isRealFloating()); // Only floating types
ARG_ASSERT(2,
xo_info.getType() == yo_info.getType()); // Must have same type
ARG_ASSERT(1, zi_info.isSingle() ==
xo_info.isSingle()); // Must have same precision
ARG_ASSERT(1, zi_info.isDouble() ==
xo_info.isDouble()); // Must have same precision
DIM_ASSERT(2, xo_dims == yo_dims); // POS0 and POS1 must have same dims
ARG_ASSERT(3, xdim >= 0 && xdim < 4);
ARG_ASSERT(5, ydim >= 0 && ydim < 4);
ARG_ASSERT(7, xi_step != 0);
ARG_ASSERT(9, yi_step != 0);
// POS should either be (x, y, 1, 1) or (x, y, zi_dims[2], zi_dims[3])
if (xo_dims[xdim] * xo_dims[ydim] != xo_dims.elements()) {
for (int i = 0; i < 4; i++) {
if (xdim != i && ydim != i) {
DIM_ASSERT(2, xo_dims[i] == zi_dims[i]);
}
}
}
if (zi_dims.ndims() == 0 || xo_dims.ndims() == 0 || yo_dims.ndims() == 0) {
af_create_handle(zo, 0, nullptr, zi_info.getType());
return;
}
dim4 zo_dims = zi_info.dims();
zo_dims[xdim] = xo_info.dims()[xdim];
zo_dims[ydim] = xo_info.dims()[ydim];
if (allocate_zo) { *zo = createHandle(zo_dims, zi_info.getType()); }
DIM_ASSERT(0, getInfo(*zo).dims() == zo_dims);
switch (zi_info.getType()) {
case f32:
approx2<float, float>(zo, zi, xo, xdim, xi_beg, xi_step, yo, ydim,
yi_beg, yi_step, method, offGrid);
break;
case f64:
approx2<double, double>(zo, zi, xo, xdim, xi_beg, xi_step, yo, ydim,
yi_beg, yi_step, method, offGrid);
break;
case c32:
approx2<cfloat, float>(zo, zi, xo, xdim, xi_beg, xi_step, yo, ydim,
yi_beg, yi_step, method, offGrid);
break;
case c64:
approx2<cdouble, double>(zo, zi, xo, xdim, xi_beg, xi_step, yo,
ydim, yi_beg, yi_step, method, offGrid);
break;
default: TYPE_ERROR(1, zi_info.getType());
}
}
af_err af_approx2_uniform(af_array *zo, const af_array zi, const af_array xo,
const int xdim, const double xi_beg,
const double xi_step, const af_array yo,
const int ydim, const double yi_beg,
const double yi_step, const af_interp_type method,
const float offGrid) {
try {
af_approx2_common(zo, zi, xo, xdim, xi_beg, xi_step, yo, ydim, yi_beg,
yi_step, method, offGrid, true);
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_approx2_uniform_v2(af_array *zo, const af_array zi, const af_array xo,
const int xdim, const double xi_beg,
const double xi_step, const af_array yo,
const int ydim, const double yi_beg,
const double yi_step, const af_interp_type method,
const float offGrid) {
try {
ARG_ASSERT(0, zo != 0); // need to dereference zo in next call
af_approx2_common(zo, zi, xo, xdim, xi_beg, xi_step, yo, ydim, yi_beg,
yi_step, method, offGrid, *zo == 0);
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_approx2(af_array *zo, const af_array zi, const af_array xo,
const af_array yo, const af_interp_type method,
const float offGrid) {
try {
af_approx2_common(zo, zi, xo, 0, 0.0, 1.0, yo, 1, 0.0, 1.0, method,
offGrid, true);
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_approx2_v2(af_array *zo, const af_array zi, const af_array xo,
const af_array yo, const af_interp_type method,
const float offGrid) {
try {
ARG_ASSERT(0, zo != 0); // need to dereference zo in next call
af_approx2_common(zo, zi, xo, 0, 0.0, 1.0, yo, 1, 0.0, 1.0, method,
offGrid, *zo == 0);
}
CATCHALL;
return AF_SUCCESS;
}