libvoipcodecs  0.0.1
lsf.h
1 /*
2  * iLBC - a library for the iLBC codec
3  *
4  * lsf.h - The iLBC low bit rate speech codec.
5  *
6  * Adapted by Steve Underwood <steveu@coppice.org> from the reference
7  * iLBC code supplied in RFC3951.
8  *
9  * Original code Copyright (C) The Internet Society (2004).
10  * All changes to produce this version Copyright (C) 2008 by Steve Underwood
11  * All Rights Reserved.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16  *
17  * $Id: lsf.h,v 1.2 2008/03/06 12:27:38 steveu Exp $
18  */
19 
20 #ifndef __iLBC_LSF_H
21 #define __iLBC_LSF_H
22 
23 void a2lsf(float *freq, /* (o) lsf coefficients */
24  float *a); /* (i) lpc coefficients */
25 
26 void lsf2a(float *a_coef, /* (o) lpc coefficients */
27  float *freq); /* (i) lsf coefficients */
28 
29 #endif