1 | /* |
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2 | Copyright (C) 2007 Amaury Hazan <ahazan@iua.upf.edu> |
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3 | and Paul Brossier <piem@piem.org> |
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4 | |
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5 | This program is free software; you can redistribute it and/or modify |
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6 | it under the terms of the GNU General Public License as published by |
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7 | the Free Software Foundation; either version 2 of the License, or |
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8 | (at your option) any later version. |
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9 | |
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10 | This program is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | GNU General Public License for more details. |
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14 | |
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15 | You should have received a copy of the GNU General Public License |
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16 | along with this program; if not, write to the Free Software |
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17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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18 | |
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19 | */ |
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20 | |
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21 | /* part of this mfcc implementation were inspired from LibXtract |
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22 | http://libxtract.sourceforge.net/ |
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23 | */ |
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24 | |
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25 | #include "aubio_priv.h" |
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26 | #include "filterbank.h" |
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27 | |
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28 | /** \brief A structure to store a set of n_filters filters of lenghts win_s */ |
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29 | struct aubio_filterbank_t_ { |
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30 | uint_t win_s; |
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31 | uint_t n_filters; |
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32 | fvec_t *filters; |
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33 | }; |
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34 | |
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35 | aubio_filterbank_t * new_aubio_filterbank(uint_t n_filters, uint_t win_s){ |
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36 | /** allocating space for filterbank object */ |
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37 | aubio_filterbank_t * fb = AUBIO_NEW(aubio_filterbank_t); |
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38 | uint_t filter_cnt; |
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39 | fb->win_s=win_s; |
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40 | fb->n_filters=n_filters; |
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41 | |
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42 | /** allocating filter tables */ |
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43 | fb->filters=AUBIO_ARRAY(n_filters,fvec_t); |
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44 | for (filter_cnt=0; filter_cnt<n_filters; filter_cnt++) |
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45 | /* considering one-channel filters */ |
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46 | filters[filter_cnt]=new_fvec(win_s, 1); |
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47 | |
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48 | } |
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49 | |
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50 | void del_aubio_filterbank(aubio_filterbank_t * fb){ |
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51 | |
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52 | int filter_cnt; |
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53 | /** deleting filter tables first */ |
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54 | for (filter_cnt=0; filter_cnt<fb->n_filters; filter_cnt++) |
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55 | del_fvec(fb->filters[filter_cnt]); |
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56 | AUBIO_FREE(fb->filters); |
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57 | AUBIO_FREE(fb); |
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58 | |
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59 | } |
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60 | |
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