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 multiple-comb filter |
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24 | |
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25 | This fundamental frequency estimation algorithm implements spectral |
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26 | flattening, multi-comb filtering and peak histogramming. |
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27 | |
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28 | This method was designed by Juan P. Bello and described in: |
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29 | |
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30 | Juan-Pablo Bello. ``Towards the Automated Analysis of Simple Polyphonic |
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31 | Music''. PhD thesis, Centre for Digital Music, Queen Mary University of |
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32 | London, London, UK, 2003. |
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33 | |
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34 | */ |
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35 | |
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36 | #ifndef PITCHMCOMB_H |
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37 | #define PITCHMCOMB_H |
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38 | |
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39 | #ifdef __cplusplus |
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40 | extern "C" { |
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41 | #endif |
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42 | |
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43 | /** pitch detection object */ |
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44 | typedef struct _aubio_pitchmcomb_t aubio_pitchmcomb_t; |
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45 | |
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46 | /** execute pitch detection on an input spectral frame |
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47 | |
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48 | \param p pitch detection object as returned by new_aubio_pitchmcomb |
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49 | \param fftgrain input signal spectrum as computed by aubio_pvoc_do |
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50 | |
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51 | */ |
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52 | void aubio_pitchmcomb_do (aubio_pitchmcomb_t * p, cvec_t * fftgrain, 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 analyse |
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58 | \param samplerate sampling rate of the signal |
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59 | |
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60 | */ |
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61 | aubio_pitchmcomb_t * new_aubio_pitchmcomb(uint_t bufsize, uint_t hopsize, uint_t channels); |
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62 | /** deletion of the pitch detection object |
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63 | |
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64 | \param p pitch detection object as returned by new_aubio_pitchfcomb |
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65 | |
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66 | */ |
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67 | void del_aubio_pitchmcomb(aubio_pitchmcomb_t *p); |
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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/*PITCHMCOMB_H*/ |
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