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** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
** 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
** 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.

#define     ABS(a)                  (((a) < 0) ? - (a) : (a))
#define MIN(a,b)        (((a) < (b)) ? (a) : (b))
#define     MAX(a,b)          (((a) >= (b)) ? (a) : (b))

#define     ARRAY_LEN(x)      ((int) (sizeof (x) / sizeof ((x) [0])))

void gen_windowed_sines (int freq_count, const double *freqs, double max, float *output, int output_len) ;

void save_oct_float (char *filename, float *input, int in_len, float *output, int out_len) ;
void save_oct_double (char *filename, double *input, int in_len, double *output, int out_len) ;

void interleave_data (const float *in, float *out, int frames, int channels) ;

void deinterleave_data (const float *in, float *out, int frames, int channels) ;

void reverse_data (float *data, int datalen) ;

double calculate_snr (float *data, int len, int expected_peaks) ;

#if OS_IS_WIN32
**    Extra Win32 hacks.
**    Despite Microsoft claim of windows being POSIX compatibile it has '_sleep'
**    instead of 'sleep'.

#define sleep _sleep

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