1 | /* |
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2 | Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org> |
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3 | |
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4 | This file is part of aubio. |
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5 | |
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6 | aubio is free software: you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation, either version 3 of the License, or |
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9 | (at your option) any later version. |
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10 | |
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11 | aubio is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
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17 | along with aubio. If not, see <http://www.gnu.org/licenses/>. |
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18 | |
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19 | */ |
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20 | |
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21 | #include "config.h" |
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22 | |
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23 | #if HAVE_SAMPLERATE |
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24 | |
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25 | #include <samplerate.h> /* from libsamplerate */ |
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26 | |
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27 | #include "aubio_priv.h" |
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28 | #include "fvec.h" |
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29 | #include "temporal/resampler.h" |
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30 | |
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31 | struct _aubio_resampler_t { |
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32 | SRC_DATA *proc; |
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33 | SRC_STATE *stat; |
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34 | smpl_t ratio; |
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35 | uint_t type; |
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36 | }; |
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37 | |
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38 | aubio_resampler_t * new_aubio_resampler(smpl_t ratio, uint_t type) { |
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39 | aubio_resampler_t * s = AUBIO_NEW(aubio_resampler_t); |
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40 | int error = 0; |
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41 | s->stat = src_new (type, 1, &error) ; /* only one channel */ |
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42 | s->proc = AUBIO_NEW(SRC_DATA); |
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43 | if (error) AUBIO_ERR("%s\n",src_strerror(error)); |
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44 | s->ratio = ratio; |
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45 | return s; |
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46 | } |
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47 | |
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48 | void del_aubio_resampler(aubio_resampler_t *s) { |
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49 | src_delete(s->stat); |
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50 | AUBIO_FREE(s->proc); |
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51 | AUBIO_FREE(s); |
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52 | } |
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53 | |
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54 | void aubio_resampler_do (aubio_resampler_t *s, |
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55 | fvec_t * input, fvec_t * output) { |
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56 | uint_t i ; |
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57 | s->proc->input_frames = input->length; |
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58 | s->proc->output_frames = output->length; |
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59 | s->proc->src_ratio = (double)s->ratio; |
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60 | for (i = 0 ; i< input->channels; i++) |
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61 | { |
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62 | /* make SRC_PROC data point to input outputs */ |
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63 | s->proc->data_in = (float *)input->data[i]; |
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64 | s->proc->data_out= (float *)output->data[i]; |
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65 | /* do resampling */ |
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66 | src_process (s->stat, s->proc) ; |
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67 | } |
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68 | } |
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69 | |
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70 | #endif /* HAVE_SAMPLERATE */ |
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