Changeset 7a46bf6 for src/filterbank.h


Ignore:
Timestamp:
Sep 10, 2007, 7:29:32 PM (17 years ago)
Author:
Amaury Hazan <mahmoudax@gmail.org>
Branches:
feature/autosink, feature/cnn, feature/cnn_org, feature/constantq, feature/crepe, feature/crepe_org, feature/pitchshift, feature/pydocstrings, feature/timestretch, fix/ffmpeg5, master, pitchshift, sampler, timestretch, yinfft+
Children:
787f1f3, ef1c3b7
Parents:
7c6c806d (diff), 45134c5 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

merged from piem, corrected mffcs coefs/filter number
added some scripts to visualize filterbank and mfccs

File:
1 edited

Legend:

Unmodified
Added
Removed

  • src/filterbank.h

    r7c6c806d r7a46bf6  
    11/*
    2    Copyright (C) 2007 Amaury Hazan
    3    Ported to aubio from LibXtract
    4    http://libxtract.sourceforge.net/
    5    
     2   Copyright (C) 2007 Amaury Hazan <ahazan@iua.upf.edu>
     3                  and Paul Brossier <piem@piem.org>
    64
    75   This program is free software; you can redistribute it and/or modify
    … …  
    2018*/
    2119
    22 #ifndef AUBIOFILTERBANK_H
    23 #define AUBIOFILTERBANK_H
     20/** \file
     21
     22  Filterbank object
     23
     24  General-purpose spectral filterbank object. Comes with mel-filter initialization function.
     25
     26*/
     27
     28#ifndef FILTERBANK_H
     29#define FILTERBANK_H
    2430
    2531#ifdef __cplusplus
    … …  
    2733#endif
    2834
     35typedef struct aubio_filterbank_t_ aubio_filterbank_t;
     36
     37/** create filterbank object
     38
     39  \param win_s size of analysis buffer (and length the FFT transform)
     40  \param n_filters number of filters to create
     41
     42*/
     43
     44aubio_filterbank_t * new_aubio_filterbank(uint_t n_filters, uint_t win_s);
     45
     46/** filterbank initialization for mel filters
     47
     48  \param nyquist nyquist frequency, i.e. half of the sampling rate
     49  \param style libxtract style
     50  \param freqmin lowest filter frequency
     51  \param freqmax highest filter frequency
     52
     53*/
     54aubio_filterbank_t * new_aubio_filterbank_mfcc(uint_t n_filters, uint_t win_s, smpl_t samplerate, smpl_t freq_min, smpl_t freq_max);
    2955
    3056
    31 typedef struct aubio_mel_filter_ aubio_mel_filter;
     57/** destroy filterbank object
    3258
    33 // Initialization
     59  \param fb filterbank, as returned by new_aubio_filterbank method
    3460
    35 /** \brief A function to initialise a mel filter bank
    36  *
    37  * It is up to the caller to pass in a pointer to memory allocated for freq_bands arrays of length N. This function populates these arrays with magnitude coefficients representing the mel filterbank on a linear scale
    38  */
    39 int aubio_mfcc_init(int N, smpl_t nyquist, int style, smpl_t freq_min, smpl_t freq_max, int freq_bands, smpl_t ** fft_tables);
     61*/
     62void del_aubio_filterbank(aubio_filterbank_t * fb);
     63
     64/** compute filterbank
     65
     66*/
     67void aubio_filterbank_do(aubio_filterbank_t * fb, cvec_t * in, fvec_t *out);
    4068
    4169#ifdef __cplusplus
    … …  
    4371#endif
    4472
    45 #endif
     73#endif // FILTERBANK_H
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