libvoipcodecs  0.0.1
gainquant.h
1 /*
2  * iLBC - a library for the iLBC codec
3  *
4  * gainquant.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: gainquant.h,v 1.2 2008/03/06 12:27:38 steveu Exp $
18  */
19 
20 #ifndef __iLBC_GAINQUANT_H
21 #define __iLBC_GAINQUANT_H
22 
23 float gainquant( /* (o) quantized gain value */
24  float in, /* (i) gain value */
25  float maxIn, /* (i) maximum of gain value */
26  int cblen, /* (i) number of quantization indices */
27  int *index); /* (o) quantization index */
28 
29 float gaindequant( /* (o) quantized gain value */
30  int index, /* (i) quantization index */
31  float maxIn, /* (i) maximum of unquantized gain */
32  int cblen); /* (i) number of quantization indices */
33 
34 #endif