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/* Copyright 2017. The Regents of the University of California.
* All rights reserved. Use of this source code is governed by
* a BSD-style license which can be found in the LICENSE file.
*
* Authors:
* 2017 Jon Tamir <jtamir@eecs.berkeley.edu>
*/
#include <stdlib.h>
#include "num/filter.h"
#include "num/flpmath.h"
#include "num/multind.h"
#include "misc/misc.h"
#include "utest.h"
static bool test_window(unsigned int D, long dims[D], long flags, bool hamming, const complex float* ref)
{
complex float* in = md_alloc(3, dims, CFL_SIZE);
md_zfill(3, dims, in, 1.);
complex float* out = md_alloc(3, dims, CFL_SIZE);
(hamming ? md_zhamming : md_zhann)(3, dims, flags, out, in);
bool ret = (md_znrmse(3, dims, &ref[0], out) < UT_TOL);
md_free(out);
md_free(in);
return ret;
}
static bool test_hamming(void)
{
// compare to Matlab:
// >> z = permute(repmat(hamming(5)*hamming(4)', [1, 1, 2]), [3, 1, 2]);
// >> z(:)
const complex float ref[2 * 5 * 4] = {
0.0064, 0.0064, 0.0432, 0.0432,
0.0800, 0.0800, 0.0432, 0.0432,
0.0064, 0.0064, 0.0616, 0.0616,
0.4158, 0.4158, 0.7700, 0.7700,
0.4158, 0.4158, 0.0616, 0.0616,
0.0616, 0.0616, 0.4158, 0.4158,
0.7700, 0.7700, 0.4158, 0.4158,
0.0616, 0.0616, 0.0064, 0.0064,
0.0432, 0.0432, 0.0800, 0.0800,
0.0432, 0.0432, 0.0064, 0.0064,
};
long dims[3] = { 2, 5, 4 };
return test_window(3, dims, MD_BIT(1) | MD_BIT(2), true, ref);
}
UT_REGISTER_TEST(test_hamming);
static bool test_hann(void)
{
// compare to Matlab:
// >> z = permute(repmat(hann(4)*hann(5)', [1, 1, 2]), [1, 3, 2]);
// >> z(:)
const complex float ref[4 * 2 * 5] = {
0.0000, 0.0000, 0.0000, 0.0000,
0.0000, 0.0000, 0.0000, 0.0000,
0.0000, 0.3750, 0.3750, 0.0000,
0.0000, 0.3750, 0.3750, 0.0000,
0.0000, 0.7500, 0.7500, 0.0000,
0.0000, 0.7500, 0.7500, 0.0000,
0.0000, 0.3750, 0.3750, 0.0000,
0.0000, 0.3750, 0.3750, 0.0000,
0.0000, 0.0000, 0.0000, 0.0000,
0.0000, 0.0000, 0.0000, 0.0000,
};
long dims[3] = { 4, 2, 5 };
return test_window(3, dims, MD_BIT(0) | MD_BIT(2), false, ref);
}
UT_REGISTER_TEST(test_hann);
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