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 | /** \file |
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22 | |
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23 | Pitch detection using a fast harmonic comb filter |
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24 | |
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25 | This pitch extraction method implements a fast harmonic comb filter to |
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26 | determine the fundamental frequency of a harmonic sound. |
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27 | |
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28 | This file was derived from the tuneit project, written by Mario Lang to |
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29 | detect the fundamental frequency of a sound. |
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30 | |
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31 | see http://delysid.org/tuneit.html |
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32 | |
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33 | */ |
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34 | |
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35 | #ifndef _PITCHFCOMB_H |
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36 | #define _PITCHFCOMB_H |
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37 | |
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38 | #ifdef __cplusplus |
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39 | extern "C" { |
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40 | #endif |
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41 | |
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42 | /** pitch detection object */ |
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43 | typedef struct _aubio_pitchfcomb_t aubio_pitchfcomb_t; |
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44 | |
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45 | /** execute pitch detection on an input buffer |
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46 | |
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47 | \param p pitch detection object as returned by new_aubio_pitchfcomb |
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48 | \param input input signal window (length as specified at creation time) |
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49 | \param output pitch candidates in bins |
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50 | |
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51 | */ |
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52 | void aubio_pitchfcomb_do (aubio_pitchfcomb_t *p, fvec_t * input, fvec_t * output); |
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53 | /** creation of the pitch detection object |
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54 | |
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55 | \param bufsize size of the input buffer to analyse |
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56 | \param hopsize step size between two consecutive analysis instant |
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57 | \param channels number of channels to detect pitch on |
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58 | |
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59 | */ |
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60 | aubio_pitchfcomb_t * new_aubio_pitchfcomb (uint_t bufsize, uint_t hopsize, uint_t channels); |
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61 | /** deletion of the pitch detection object |
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62 | |
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63 | \param p pitch detection object as returned by new_aubio_pitchfcomb |
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64 | |
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65 | */ |
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66 | void del_aubio_pitchfcomb (aubio_pitchfcomb_t *p); |
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67 | |
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68 | |
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69 | #ifdef __cplusplus |
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70 | } |
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71 | #endif |
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72 | |
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73 | #endif /* _PITCHFCOMB_H */ |
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74 | |
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75 | |
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