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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
* \brief u-Law to Signed linear conversion
*/
#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 /* _ASTERISK_ULAW_H */
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