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/* 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.
*/
/* xtract_scalar.h: declares functions that extract a feature as a vector from an input vector */
#ifndef XTRACT_VECTOR
#define XTRACT_VECTOR
#ifdef __cplusplus
extern "C" {
#endif
/* Extracts normalized (0-1) frequency domain magnitude spectrum from time domain signal */
int xtract_magnitude_spectrum(float *data, int N, void *argv, float *result);
/* Autocorrelation */
int xtract_autocorrelation(float *data, int N, void *argv, float *result);
int xtract_autocorrelation_fft(float *data, int N, void *argv, float *result);
/* Average Magnitude Difference Function */
int xtract_amdf(float *data, int N, void *argv, float *result);
/* Average Squared Difference Function */
int xtract_asdf(float *data, int N, void *argv, float *result);
/* MFCC */
/* Rabiner */
int xtract_mfcc(float *data, int N, void *argv, float *result);
/* Bark band */
int xtract_bark_coefficients(float *data, int N, void *argv, float *result);
/* Discrete cosine transform */
int xtract_dct(float *data, int N, void *argv, float *result);
/* Frequency and amplitude of spectral peaks */
/* Takes peak threshold as percentage below max peak, and sr as argv, returns a pointer to an array of size N, containing N/2 freqs and N/2 amplitudes, amplitudes are on a decibel scale with dbFS = 0 */
int xtract_peaks(float *data, int N, void *argv, float *result);
#ifdef __cplusplus
}
#endif
#endif
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