mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-21 06:03:12 +00:00
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
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 */
|