view src/libxtract.c @ 96:757e6f99dcd7

Dan Stowell: Removed strange "zeroing" part of xtract_mfcc() which was zeroing a load of elements despite the fact that they're ignored by the DCT process called next, and never used for anything. This was writing to an assumed large result array (same size as number of FFT bins) despite the fact that only a small number of MFCCs (typically less than 50) are required, therefore either wasting memory or writing to memory it shouldn't do!

/* libxtract feature extraction library
 *  
 * Copyright (C) 2006 Jamie Bullock
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.
 */


#include "xtract/libxtract.h"
#define XTRACT_H

int(*xtract[])(const float *, const int, const void *, float *) = {
    /* xtract_scalar.h */
    xtract_mean,
    xtract_variance,
    xtract_standard_deviation,
    xtract_average_deviation,
    xtract_skewness,
    xtract_kurtosis,
    xtract_spectral_mean,
    xtract_spectral_variance,
    xtract_spectral_standard_deviation,
    xtract_spectral_average_deviation,
    xtract_spectral_skewness,
    xtract_spectral_kurtosis,
    xtract_spectral_centroid,
    xtract_irregularity_k,
    xtract_irregularity_j,
    xtract_tristimulus_1,
    xtract_tristimulus_2,
    xtract_tristimulus_3,
    xtract_smoothness,
    xtract_spread,
    xtract_zcr,
    xtract_rolloff,
    xtract_loudness,
    xtract_flatness,
    xtract_tonality,
    xtract_crest,
    xtract_noisiness,
    xtract_rms_amplitude,
    xtract_spectral_inharmonicity,
    xtract_power,
    xtract_odd_even_ratio,
    xtract_sharpness,
    xtract_spectral_slope,
    xtract_lowest_value,
    xtract_highest_value,
    xtract_sum,
    xtract_nonzero_count,
    xtract_hps,
    xtract_f0,
    xtract_failsafe_f0,
/* xtract_delta.h */
    xtract_flux,
    xtract_attack_time,
    xtract_decay_time,
    xtract_delta_feature,
/* xtract_vector.h */
    xtract_autocorrelation,
    xtract_amdf,
    xtract_asdf,
    xtract_bark_coefficients,
    xtract_peak_spectrum,
    xtract_spectrum,
    xtract_autocorrelation_fft,
    xtract_mfcc,
    xtract_dct,
    xtract_harmonic_spectrum
};