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/******************************************************************************
* *
* Copyright (C) 1992-1995 Tony Robinson *
* *
* See the file doc/LICENSE.shorten for conditions on distribution and usage *
* *
******************************************************************************/
/*
* $Id: shorten.c,v 1.7 2003/08/26 05:34:04 jason Exp $
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <setjmp.h>
#include "shorten.h"
void init_offset(slong **offset,int nchan,int nblock,int ftype)
{
slong mean = 0;
int chan, i;
/* initialise offset */
switch(ftype)
{
case TYPE_AU1:
case TYPE_S8:
case TYPE_S16HL:
case TYPE_S16LH:
case TYPE_ULAW:
case TYPE_AU2:
case TYPE_AU3:
case TYPE_ALAW:
mean = 0;
break;
case TYPE_U8:
mean = 0x80;
break;
case TYPE_U16HL:
case TYPE_U16LH:
mean = 0x8000;
break;
default:
shn_debug("Unknown file type: %d", ftype);
}
for(chan = 0; chan < nchan; chan++)
for(i = 0; i < nblock; i++)
offset[chan][i] = mean;
}
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