/*
 *   Copyright (c) 1997, 1999 Hellmuth Michaelis. All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 *   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 *   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 *   OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *   OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *   SUCH DAMAGE.
 *
 *---------------------------------------------------------------------------
 *
 *	convert a-law / u-law sound files
 *	---------------------------------
 *
 *	last edit-date: [Tue Feb 16 11:23:27 1999]
 *
 *	$Id: alaw2ulaw.c,v 1.4 1999/02/16 10:40:18 hm Exp $
 *
 *---------------------------------------------------------------------------*/

#include <string.h>
#include <unistd.h>

#define BUF_SIZ	2048

static unsigned char raw_ulaw[];
static unsigned char ulaw_raw[];

	
int main(int argc, char *argv[])
{
	int i, j;
	unsigned char buffer[BUF_SIZ];
	char *p;
	unsigned char *cp;

	if((p = rindex(*argv, '/')) != NULL)
		p++;
	else
		p = *argv;

	if(!strcmp(p, "ulaw2alaw"))
	{
		cp = ulaw_raw;
	}
	else if(!strcmp(p, "alaw2ulaw"))
	{
		cp = raw_ulaw;
	}
	else
	{
		return(1);
	}
	
	while(((j = read(0, buffer, BUF_SIZ)) > 0))
	{
		for(i = 0; i < j; i++)
			buffer[i] = cp[buffer[i]];
		write(1, buffer, j);
	}
	return(0);
}


/*---------------------------------------------------------------------------*
 *	Line format to mu-law conversion
 *---------------------------------------------------------------------------*/
static unsigned char raw_ulaw[256] = {
	0x2a, 0xa9, 0x62, 0xe1, 0x0a, 0x8a, 0x48, 0xc8, 0x39, 0xb9, 0x75, 0xf3,0x1a, 0x9a, 0x56, 0xd6,
	0x22, 0xa1, 0x5d, 0xdc, 0x02, 0x82, 0x40, 0xc0, 0x31, 0xb1, 0x6a, 0xe9,0x12, 0x92, 0x4f, 0xcf,
	0x2e, 0xad, 0x66, 0xe5, 0x0e, 0x8e, 0x4c, 0xcc, 0x3d, 0xbd, 0x7d, 0xfb,0x1e, 0x9e, 0x5a, 0xda,
	0x26, 0xa5, 0x5f, 0xde, 0x06, 0x86, 0x44, 0xc4, 0x35, 0xb5, 0x6e, 0xed,0x16, 0x96, 0x52, 0xd2,
	0x28, 0xa7, 0x60, 0xdf, 0x08, 0x88, 0x46, 0xc6, 0x37, 0xb7, 0x71, 0xef,0x18, 0x98, 0x54, 0xd4,
	0x20, 0x9f, 0x5c, 0xdb, 0x00, 0x80, 0x3f, 0xbf, 0x2f, 0xaf, 0x68, 0xe7,0x10, 0x90, 0x4e, 0xce,
	0x2c, 0xab, 0x64, 0xe3, 0x0c, 0x8c, 0x4a, 0xca, 0x3b, 0xbb, 0x79, 0xf7,0x1c, 0x9c, 0x58, 0xd8,
	0x24, 0xa3, 0x5e, 0xdd, 0x04, 0x84, 0x42, 0xc2, 0x33, 0xb3, 0x6c, 0xeb,0x14, 0x94, 0x50, 0xd0,
	0x2b, 0xaa, 0x63, 0xe2, 0x0b, 0x8b, 0x49, 0xc9, 0x3a, 0xba, 0x77, 0xf5,0x1b, 0x9b, 0x57, 0xd7,
	0x23, 0xa2, 0x5d, 0xdd, 0x03, 0x83, 0x41, 0xc1, 0x32, 0xb2, 0x6b, 0xea,0x13, 0x93, 0x4f, 0xcf,
	0x2f, 0xae, 0x67, 0xe6, 0x0f, 0x8f, 0x4d, 0xcd, 0x3e, 0xbe, 0xff, 0xfd,0x1f, 0x9f, 0x5b, 0xdb,
	0x27, 0xa6, 0x5f, 0xdf, 0x07, 0x87, 0x45, 0xc5, 0x36, 0xb6, 0x6f, 0xee,0x17, 0x97, 0x53, 0xd3,
	0x29, 0xa8, 0x61, 0xe0, 0x09, 0x89, 0x47, 0xc7, 0x38, 0xb8, 0x73, 0xf1,0x19, 0x99, 0x55, 0xd5,
	0x21, 0xa0, 0x5c, 0xdc, 0x01, 0x81, 0x3f, 0xbf, 0x30, 0xb0, 0x69, 0xe8,0x11, 0x91, 0x4e, 0xce,
	0x2d, 0xac, 0x65, 0xe4, 0x0d, 0x8d, 0x4b, 0xcb, 0x3c, 0xbc, 0x7b, 0xf9,0x1d, 0x9d, 0x59, 0xd9,
	0x25, 0xa4, 0x5e, 0xde, 0x05, 0x85, 0x43, 0xc3, 0x34, 0xb4, 0x6d, 0xec,0x15, 0x95, 0x51, 0xd1
};


/*---------------------------------------------------------------------------*
 *	mu-law to line format conversion
*---------------------------------------------------------------------------*/
static unsigned char ulaw_raw[256] = {
	0x54, 0xd4, 0x14, 0x94, 0x74, 0xf4, 0x34, 0xb4, 0x44, 0xc4, 0x04, 0x84,0x64, 0xe4, 0x24, 0xa4,
	0x5c, 0xdc, 0x1c, 0x9c, 0x7c, 0xfc, 0x3c, 0xbc, 0x4c, 0xcc, 0x0c, 0x8c,0x6c, 0xec, 0x2c, 0xac,
	0xd0, 0x10, 0x90, 0x70, 0xf0, 0x30, 0xb0, 0x40, 0xc0, 0x00, 0x80, 0x60,0xe0, 0x20, 0xa0, 0x58,
	0xd8, 0x18, 0x98, 0x78, 0xf8, 0x38, 0xb8, 0x48, 0xc8, 0x08, 0x88, 0x68,0xe8, 0x28, 0xa8, 0xd6,
	0x16, 0x96, 0x76, 0xf6, 0x36, 0xb6, 0x46, 0xc6, 0x06, 0x86, 0x66, 0xe6,0x26, 0xa6, 0xde, 0x9e,
	0x7e, 0xfe, 0x3e, 0xbe, 0x4e, 0xce, 0x0e, 0x8e, 0x6e, 0xee, 0x2e, 0xae,0xd2, 0x92, 0xf2, 0xb2,
	0xc2, 0x02, 0x82, 0x62, 0xe2, 0x22, 0xa2, 0x5a, 0xda, 0x1a, 0x9a, 0x7a,0xfa, 0x3a, 0xba, 0x4a,
	0x4a, 0xca, 0xca, 0x0a, 0x0a, 0x8a, 0x8a, 0x6a, 0x6a, 0xea, 0xea, 0x2a,0x2a, 0xaa, 0xab, 0xab,
	0x55, 0xd5, 0x15, 0x95, 0x75, 0xf5, 0x35, 0xb5, 0x45, 0xc5, 0x05, 0x85,0x65, 0xe5, 0x25, 0xa5,
	0x5d, 0xdd, 0x1d, 0x9d, 0x7d, 0xfd, 0x3d, 0xbd, 0x4d, 0xcd, 0x0d, 0x8d,0x6d, 0xed, 0x2d, 0xad,
	0x51, 0xd1, 0x11, 0x91, 0x71, 0xf1, 0x31, 0xb1, 0x41, 0xc1, 0x01, 0x81,0x61, 0xe1, 0x21, 0xa1,
	0xd9, 0x19, 0x99, 0x79, 0xf9, 0x39, 0xb9, 0x49, 0xc9, 0x09, 0x89, 0x69,0xe9, 0x29, 0xa9, 0x57,
	0x17, 0x97, 0x77, 0xf7, 0x37, 0xb7, 0x47, 0xc7, 0x07, 0x87, 0x67, 0xe7,0x27, 0xa7, 0x5f, 0x1f,
	0x7f, 0xff, 0x3f, 0xbf, 0x4f, 0xcf, 0x0f, 0x8f, 0x6f, 0xef, 0x2f, 0xaf,0x53, 0x13, 0x73, 0x33,
	0x43, 0xc3, 0x03, 0x83, 0x63, 0xe3, 0x23, 0xa3, 0x5b, 0xdb, 0x1b, 0x9b,0x7b, 0xfb, 0x3b, 0xbb,
	0xbb, 0x4b, 0x4b, 0xcb, 0xcb, 0x0b, 0x0b, 0x8b, 0x8b, 0x6b, 0x6b, 0xeb,0xeb, 0x2b, 0x2b, 0xab
};

/* EOF */