libilbc  0.0.1
lsf.h
00001 /*
00002  * iLBC - a library for the iLBC codec
00003  *
00004  * lsf.h - The iLBC low bit rate speech codec.
00005  *
00006  * Adapted by Steve Underwood <steveu@coppice.org> from the reference
00007  * iLBC code supplied in RFC3951.
00008  *
00009  * Original code Copyright (C) The Internet Society (2004).
00010  * All changes to produce this version Copyright (C) 2008 by Steve Underwood
00011  * All Rights Reserved.
00012  *
00013  * This program is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00016  *
00017  * $Id: lsf.h,v 1.2 2008/03/06 12:27:38 steveu Exp $
00018  */
00019 
00020 #ifndef __iLBC_LSF_H
00021 #define __iLBC_LSF_H
00022 
00023 void a2lsf(float *freq,     /* (o) lsf coefficients */
00024            float *a);       /* (i) lpc coefficients */
00025 
00026 void lsf2a(float *a_coef,   /* (o) lpc coefficients */
00027            float *freq);    /* (i) lsf coefficients */
00028 
00029 #endif