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  • src/spectral/mfcc.h

    rc879811 rdec8b9d  
    7474void aubio_mfcc_do (aubio_mfcc_t * mf, const cvec_t * in, fvec_t * out);
    7575
    76 /** set power parameter
    77 
    78   \param mf mfcc object, as returned by new_aubio_mfcc()
    79   \param power Raise norm of the input spectrum norm to this power before
    80   computing filterbank.  Defaults to `1`.
    81 
    82   See aubio_filterbank_set_power().
    83 
    84  */
    85 uint_t aubio_mfcc_set_power (aubio_mfcc_t *mf, smpl_t power);
    86 
    87 /** get power parameter
    88 
    89   \param mf mfcc object, as returned by new_aubio_mfcc()
    90   \return current power parameter. Defaults to `1`.
    91 
    92   See aubio_filterbank_get_power().
    93 
    94  */
    95 uint_t aubio_mfcc_get_power (aubio_mfcc_t *mf);
    96 
    97 /** set scaling parameter
    98 
    99   \param mf mfcc object, as returned by new_aubio_mfcc()
    100   \param scale Scaling value to apply.
    101 
    102   Scales the output of the filterbank after taking its logarithm and before
    103   computing the DCT. Defaults to `1`.
    104 
    105 */
    106 uint_t aubio_mfcc_set_scale (aubio_mfcc_t *mf, smpl_t scale);
    107 
    108 /** get scaling parameter
    109 
    110   \param mf mfcc object, as returned by new_aubio_mfcc()
    111   \return current scaling parameter. Defaults to `1`.
    112 
    113  */
    114 uint_t aubio_mfcc_get_scale (aubio_mfcc_t *mf);
    115 
    116 /** Mel filterbank initialization
    117 
    118   \param mf mfcc object
    119   \param fmin start frequency, in Hz
    120   \param fmax end frequency, in Hz
    121 
    122   The filterbank will be initialized with bands linearly spaced in the mel
    123   scale, from `fmin` to `fmax`.
    124 
    125   See also
    126   --------
    127 
    128   aubio_filterbank_set_mel_coeffs()
    129 
    130 */
    131 uint_t aubio_mfcc_set_mel_coeffs (aubio_mfcc_t *mf,
    132         smpl_t fmin, smpl_t fmax);
    133 
    134 /** Mel filterbank initialization
    135 
    136   \param mf mfcc object
    137   \param fmin start frequency, in Hz
    138   \param fmax end frequency, in Hz
    139 
    140   The bank of filters will be initalized to to cover linearly spaced bands in
    141   the Htk mel scale, from `fmin` to `fmax`.
    142 
    143   See also
    144   --------
    145 
    146   aubio_filterbank_set_mel_coeffs_htk()
    147 
    148 */
    149 uint_t aubio_mfcc_set_mel_coeffs_htk (aubio_mfcc_t *mf,
    150         smpl_t fmin, smpl_t fmax);
    151 
    152 /** Mel filterbank initialization (Auditory Toolbox's parameters)
    153 
    154   \param mf mfcc object
    155   \param samplerate audio sampling rate, in Hz
    156 
    157   The filter coefficients are built to match exactly Malcolm Slaney's Auditory
    158   Toolbox implementation. The number of filters should be 40.
    159 
    160   This is the default filterbank when `mf` was created with `n_filters = 40`.
    161 
    162   See also
    163   --------
    164 
    165   aubio_filterbank_set_mel_coeffs_slaney()
    166 
    167 */
    168 uint_t aubio_mfcc_set_mel_coeffs_slaney (aubio_mfcc_t *mf);
    169 
    17076#ifdef __cplusplus
    17177}
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