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/* $OpenBSD: auconv.c,v 1.1 1997/10/07 14:07:45 niklas Exp $ */
/* $NetBSD: auconv.c,v 1.2 1997/08/24 22:20:24 augustss Exp $ */
/*
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
*/
#include <sys/types.h>
#include <sys/audioio.h>
#include <machine/endian.h>
#include <dev/auconv.h>
#if BYTE_ORDER == LITTLE_ENDIAN
#define LO 0
#define HI 1
#else
#define LO 1
#define HI 0
#endif
void
change_sign8(v, p, cc)
void *v;
u_char *p;
int cc;
{
while (--cc >= 0) {
*p ^= 0x80;
++p;
}
}
void
change_sign16(v, p, cc)
void *v;
u_char *p;
int cc;
{
while ((cc -= 2) >= 0) {
p[HI] ^= 0x80;
p += 2;
}
}
void
swap_bytes(v, p, cc)
void *v;
u_char *p;
int cc;
{
u_char t;
while ((cc -= 2) >= 0) {
t = p[0];
p[0] = p[1];
p[1] = t;
p += 2;
}
}
void
swap_bytes_change_sign16(v, p, cc)
void *v;
u_char *p;
int cc;
{
u_char t;
while ((cc -= 2) >= 0) {
t = p[HI];
p[HI] = p[LO] ^ 0x80;
p[LO] = t;
p += 2;
}
}
void
change_sign16_swap_bytes(v, p, cc)
void *v;
u_char *p;
int cc;
{
u_char t;
while ((cc -= 2) >= 0) {
t = p[LO];
p[LO] = p[HI] ^ 0x80;
p[HI] = t;
p += 2;
}
}
void
linear8_to_linear16(v, p, cc)
void *v;
u_char *p;
int cc;
{
u_char *q = p;
p += cc;
q += cc * 2;
while (--cc >= 0) {
q -= 2;
q[HI] = *--p;
q[LO] = 0;
}
}
void
linear16_to_linear8(v, p, cc)
void *v;
u_char *p;
int cc;
{
u_char *q = p;
while ((cc -= 2) >= 0) {
*q++ = p[HI];
p += 2;
}
}
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