/* $Id: ulaw.h,v 1.3 1999/03/10 07:58:05 boyns Exp $ */
/*
* Copyright (C) 1993-99 Mark R. Boyns <boyns@doit.org>
*
* This file is part of rplay.
*
* rplay is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* rplay is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rplay; see the file COPYING. If not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _ulaw_h
#define _ulaw_h
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/*
* ulaw formats
*/
#define ULAW_MULAW_8 1 /* 8-bit ISDN u-law (CCITT G.711) */
#define ULAW_LINEAR_8 2 /* 8-bit linear PCM */
#define ULAW_LINEAR_16 3 /* 16-bit linear PCM */
#define ULAW_LINEAR_24 4 /* 24-bit linear PCM */
#define ULAW_LINEAR_32 5 /* 32-bit linear PCM */
#define ULAW_LINEAR_FLOAT 6 /* 32-bit IEEE floating point */
#define ULAW_LINEAR_DOUBLE 7 /* 64-bit IEEE floating point */
#define ULAW_G721 23 /* CCITT G.721 4-bits ADPCM */
#define ULAW_G723_3 25 /* CCITT G.723 3-bits ADPCM */
#define ULAW_G723_5 26 /* CCITT G.723 5-bits ADPCM */
#define ULAW_MAGIC 0x2e736e64 /* ".snd" ulaw file header */
#define ULAW_HDRSIZE 24 /* minimum ulaw header size */
extern short _ulaw2linear[];
extern unsigned char *_linear2ulaw;
#define ulaw_to_linear(ulaw8) (_ulaw2linear[(unsigned char)(ulaw8)])
#define linear_to_ulaw(lin16) (_linear2ulaw[(short)(lin16) >> 3])
#if 0
#ifdef __STDC__
extern unsigned char st_linear_to_ulaw (int sample);
extern int st_ulaw_to_linear (unsigned char ulawbyte);
#else
extern unsigned char st_linear_to_ulaw ( /* int sample */ );
extern int st_ulaw_to_linear ( /* unsigned char ulawbyte */ );
#endif
#endif
#endif /* _ulaw_h */