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/*
* Asterisk -- A telephony toolkit for Linux.
*
* u-Law to Signed linear conversion
*
* Copyright (C) 1999, Mark Spencer
*
* Mark Spencer <markster@linux-support.net>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#ifndef _ASTERISK_ULAW_H
#define _ASTERISK_ULAW_H
/*! Init the ulaw conversion stuff */
/*!
* To init the ulaw to slinear conversion stuff, this needs to be run.
*/
extern void ast_ulaw_init(void);
/*! converts signed linear to mulaw */
/*!
*/
extern unsigned char __ast_lin2mu[16384];
/*! help */
extern short __ast_mulaw[256];
#define AST_LIN2MU(a) (__ast_lin2mu[((unsigned short)(a)) >> 2])
#define AST_MULAW(a) (__ast_mulaw[(a)])
#endif
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