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/* Rhythm estimation in real time
Copyright (C) 2000 Jarno Seppänen and Piotr Majdak
$Id: rhythm_quantum.h,v 1.1 2002-11-19 11:39:55 ggeiger Exp $
This file is part of rhythm_estimator.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifndef __RHYTHM_QUANTUM_H__
#define __RHYTHM_QUANTUM_H__
#include "rhythm_estimator.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Parameter default values */
#define RHYTHM_QUANTUM_DEFAULT_GCD_PERC 0.4 /* internal */
#define RHYTHM_QUANTUM_GCD_PERC_MIN 0
#define RHYTHM_QUANTUM_GCD_PERC_MAX 1
typedef struct
{
/* --- Public data --- */
/* User-changeable parameters: */
/* --- Private data --- */
/* Internal parameters: */
float gcd_perc;
float max_quantum;
float min_quantum;
float ioi_resolution;
/* Internal "helper" variables */
float* gcd_remainder_error; /* Length is below */
unsigned gcd_re_length; /* ceil(max_quantum/ioi_resolution) */
} Rhythm_Quantum;
Rhythm_Quantum* rhythm_quantum_new (void);
void rhythm_quantum_delete (Rhythm_Quantum* rhythm_quantum);
void rhythm_quantum_initialize (Rhythm_Quantum* rhythm_quantum);
void rhythm_quantum_finish (Rhythm_Quantum* rhythm_quantum);
float rhythm_quantum_compute_quantum (Rhythm_Quantum* rhythm_quantum, float *vector, unsigned len);
/* Subroutines */
static float rhythm_quantum_determine_quantum (Rhythm_Quantum* ge);
static void rhythm_quantum_compute_gcd_re (Rhythm_Quantum* ge, float *histogram, unsigned hist_len);
static float compute_median (float* vector, unsigned length);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __RHYTHM_QUANTUM_H__ */
/* EOF */
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