aubio
0.3.2
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00001 /* 00002 Copyright (C) 2003 Paul Brossier 00003 00004 This program is free software; you can redistribute it and/or modify 00005 it under the terms of the GNU General Public License as published by 00006 the Free Software Foundation; either version 2 of the License, or 00007 (at your option) any later version. 00008 00009 This program is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 GNU General Public License for more details. 00013 00014 You should have received a copy of the GNU General Public License 00015 along with this program; if not, write to the Free Software 00016 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00017 00018 */ 00019 00029 #ifndef MATHUTILS_H 00030 #define MATHUTILS_H 00031 00041 #ifdef __cplusplus 00042 extern "C" { 00043 #endif 00044 00045 typedef enum { 00046 aubio_win_rectangle, 00047 aubio_win_hamming, 00048 aubio_win_hanning, 00049 aubio_win_hanningz, 00050 aubio_win_blackman, 00051 aubio_win_blackman_harris, 00052 aubio_win_gaussian, 00053 aubio_win_welch, 00054 aubio_win_parzen 00055 } aubio_window_type; 00056 00058 void aubio_window(smpl_t *w, uint_t size, aubio_window_type wintype); 00059 00064 smpl_t aubio_unwrap2pi (smpl_t phase); 00065 00070 smpl_t vec_mean(fvec_t *s); 00075 smpl_t vec_max(fvec_t *s); 00080 smpl_t vec_min(fvec_t *s); 00085 uint_t vec_min_elem(fvec_t *s); 00090 uint_t vec_max_elem(fvec_t *s); 00099 void vec_shift(fvec_t *s); 00101 smpl_t vec_sum(fvec_t *s); 00106 smpl_t vec_local_energy(fvec_t * f); 00110 smpl_t vec_local_hfc(fvec_t * f); 00120 smpl_t vec_alpha_norm(fvec_t * DF, smpl_t alpha); 00122 void vec_dc_removal(fvec_t * mag); 00124 void vec_alpha_normalise(fvec_t * mag, uint_t alpha); 00126 void vec_add(fvec_t * mag, smpl_t threshold); 00127 00129 void vec_adapt_thres(fvec_t * vec, fvec_t * tmp, 00130 uint_t win_post, uint_t win_pre); 00150 smpl_t vec_moving_thres(fvec_t * vec, fvec_t * tmp, 00151 uint_t win_post, uint_t win_pre, uint_t win_pos); 00152 00162 smpl_t vec_median(fvec_t * input); 00163 00165 smpl_t vec_quadint(fvec_t * x,uint_t pos); 00166 00168 smpl_t vec_quadint_min(fvec_t * x,uint_t pos, uint_t span); 00169 00180 smpl_t aubio_quadfrac(smpl_t s0, smpl_t s1, smpl_t s2, smpl_t pf); 00181 00183 uint_t vec_peakpick(fvec_t * input, uint_t pos); 00184 00186 smpl_t aubio_bintomidi(smpl_t bin, smpl_t samplerate, smpl_t fftsize); 00188 smpl_t aubio_miditobin(smpl_t midi, smpl_t samplerate, smpl_t fftsize); 00190 smpl_t aubio_bintofreq(smpl_t bin, smpl_t samplerate, smpl_t fftsize); 00192 smpl_t aubio_freqtobin(smpl_t freq, smpl_t samplerate, smpl_t fftsize); 00194 smpl_t aubio_freqtomidi(smpl_t freq); 00196 smpl_t aubio_miditofreq(smpl_t midi); 00197 00199 uint_t aubio_silence_detection(fvec_t * ibuf, smpl_t threshold); 00201 smpl_t aubio_level_detection(fvec_t * ibuf, smpl_t threshold); 00205 void aubio_autocorr(fvec_t * input, fvec_t * output); 00213 void aubio_cleanup(void); 00214 00215 #ifdef __cplusplus 00216 } 00217 #endif 00218 00219 #endif 00220