From 4a2b70d02706c2343fdb31e8c6f50fa20b422b88 Mon Sep 17 00:00:00 2001 From: pp Date: Wed, 12 Mar 2008 14:44:11 +0000 Subject: - initial import of the original 0.7.6 release git-svn-id: https://lampka.siedziba.pl:790/svn/repos/lingot-win32@291 455248ca-bdda-0310-9134-f4ebb693071a --- src/lingot-signal.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/lingot-signal.h (limited to 'src/lingot-signal.h') diff --git a/src/lingot-signal.h b/src/lingot-signal.h new file mode 100644 index 0000000..7092f92 --- /dev/null +++ b/src/lingot-signal.h @@ -0,0 +1,49 @@ +//-*- 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__*/ -- cgit v1.2.3