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//-*- C++ -*-
/*
* lingot, a musical instrument tuner.
*
* Copyright (C) 2004-2007 Ibán Cereijo Graña, Jairo Chapela Martínez.
*
* This file is part of lingot.
*
* lingot 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.
*
* lingot 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 lingot; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __LINGOT_SIGNAL_H__
#define __LINGOT_SIGNAL_H__
/*
peak identification functions.
*/
#include "lingot-defs.h"
#include "lingot-config.h"
// returns noise threshold at a given frequency w.
FLT lingot_signal_get_noise_threshold(LingotConfig*, FLT w);
// returns if buffer has a peak at given index
int lingot_signal_is_peak(LingotConfig*, FLT* buffer, int index);
// returns the maximum index.
void lingot_signal_get_max(FLT *buffer, int N, int* Mi);
// returns the index of the peak that carries the fundamental freq.
int lingot_signal_get_fundamental_peak(LingotConfig*, FLT *x, FLT* y, int N);
// generates a Hamming window of N samples
void lingot_signal_hamming_window(int N, FLT* out);
#endif /*__LINGOT_SIGNAL_H__*/
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