43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/*
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* Copyright (c) 2013, Ismael Gomez-Miguelez <gomezi@tcd.ie>.
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* This file is part of OSLD-lib (http://https://github.com/ismagom/osld-lib)
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*
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* OSLD-lib 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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* OSLD-lib 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 Lesser 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 OSLD-lib. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FILTER2D_
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#define FILTER2D_
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/* 2-D real filter of complex input
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*
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*/
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typedef _Complex float cf_t;
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typedef struct {
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int sztime; // Output signal size in the time domain
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int szfreq; // Output signal size in the freq domain
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int ntime; // 2-D Filter size in time domain
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int nfreq; // 2-D Filter size in frequency domain
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float **taps; // 2-D filter coefficients
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cf_t *output; // Output signal
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} filter2d_t;
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int filter2d_init (filter2d_t* q, float **taps, int ntime, int nfreq, int sztime, int szfreq);
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int filter2d_init_default (filter2d_t* q, int ntime, int nfreq, int sztime, int szfreq);
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void filter2d_free(filter2d_t *q);
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void filter2d_reset(filter2d_t *q);
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void filter2d_add(filter2d_t *q, cf_t h, int time_idx, int freq_idx);
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#endif
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