kopia lustrzana https://github.com/Dsplib/libdspl-2.0
75 wiersze
2.4 KiB
C
75 wiersze
2.4 KiB
C
/*
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* Copyright (c) 2015-2019 Sergey Bakhurin
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* Digital Signal Processing Library [http://dsplib.org]
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*
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* This file is part of libdspl-2.0.
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*
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* is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DSPL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef DSPL_INTERNAL_H
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#define DSPL_INTERNAL_H
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#define DSPL_FARROW_LAGRANGE_COEFF 0.16666666666666666666666666666667
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#define DSPL_RAND_MOD_X1 2147483647
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#define DSPL_RAND_MOD_X2 2145483479
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// sqrt(2^31)
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#define FFT_COMPOSITE_MAX 46340
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void transpose(double* a, int n, int m, double* b);
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void transpose_cmplx(complex_t* a, int n, int m, complex_t* b);
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void transpose_hermite(complex_t* a, int n, int m, complex_t* b);
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int fft_krn(complex_t* t0, complex_t* t1, fft_t* p, int n, int addr);
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void dft2 (complex_t *x, complex_t* y);
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#define DFT3_W 0.866025403784439
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void dft3 (complex_t *x, complex_t* y);
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void dft4 (complex_t *x, complex_t* y);
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#define DFT5_W1 -1.250000000000000
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#define DFT5_W2 0.559016994374947
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#define DFT5_W3 1.538841768587630
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#define DFT5_W4 0.587785252292473
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#define DFT5_W5 0.363271264002680
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void dft5 (complex_t *x, complex_t* y);
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#define DFT7_W1 -1.166666666666666518636930
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#define DFT7_W2 0.790156468525400224045541
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#define DFT7_W3 0.055854267289647742400494
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#define DFT7_W4 0.734302201235752405317214
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#define DFT7_W5 -0.440958551844098378680314
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#define DFT7_W6 -0.340872930623931369442658
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#define DFT7_W7 0.533969360337725240661655
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#define DFT7_W8 -0.874842290961656665615465
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void dft7 (complex_t *x, complex_t* y);
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#define DFT16_W1 0.923879532511287
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#define DFT16_W2 0.382683432365090
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#define DFT16_W3 0.707106781186548
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void dft16 (complex_t *x, complex_t* y);
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void transpose4x4(complex_t *x, complex_t* y);
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#endif
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