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/*____________________________________________________________________________
FreeAmp - The Free MP3 Player
MP3 Decoder originally Copyright (C) 1995-1997 Xing Technology
Corp. http://www.xingtech.com
Portions Copyright (C) 1998 EMusic.com
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id$
____________________________________________________________________________*/
/*---- wcvt.c --------------------------------------------
conditional inclusion to wavep.c
pcm conversion to wave format
for big endians or when sizeof(short) > 16 bits
mod 1/9/97 warnings
-----------------------------------------------------------*/
static int bytes_per_samp = 1;
static int big_ender;
static int cvt_flag;
/*-------------------------------------------------------*/
void cvt_to_wave_init(int bits)
{
big_ender = 1;
if ((*(unsigned char *) &big_ender) == 1)
big_ender = 0;
/*--- printf("\n big_ender = %d", big_ender ); ---*/
if (bits == 8)
bytes_per_samp = 1;
else
bytes_per_samp = sizeof(short);
cvt_flag = 0;
if (bits > 8)
{
if (big_ender)
cvt_flag = 1;
cvt_flag |= (sizeof(short) > 2);
}
}
/*-------------------------------------------------------*/
unsigned int cvt_to_wave(unsigned char *pcm, unsigned int bytes_in)
{
unsigned int i, k;
unsigned int nsamp;
short tmp;
unsigned short *w;
// printf("\n wave convert");
if (cvt_flag == 0)
return bytes_in;
/*-- no conversion required --*/
nsamp = bytes_in / bytes_per_samp;
w = (unsigned short *) pcm;
for (i = 0, k = 0; i < nsamp; i++, k += 2)
{
tmp = w[i];
pcm[k] = (unsigned char) tmp;
pcm[k + 1] = (unsigned char) (tmp >> 8);
}
return (nsamp << 1);
/*--- return bytes out ---*/
}
/*-------------------------------------------------------*/
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