* Copyright (c) 1997 The NetBSD Foundation, Inc.

/* $NetBSD: auconv.h,v 1.6 2023/04/15 12:39:44 mlelstv Exp $ */

/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>

/* Convert between signed and unsigned. */
static inline void change_sign8(u_char *, int);
static inline void change_sign16_le(u_char *, int);
static inline void change_sign16_be(u_char *, int);
static inline void change_sign32_le(u_char *, int);
static inline void change_sign32_be(u_char *, int);
/* Convert between little and big endian. */
static inline void swap_bytes(u_char *, int);
static inline void swap_bytes32(u_char *, int);
static inline void swap_bytes_change_sign16_le(u_char *, int);
static inline void swap_bytes_change_sign16_be(u_char *, int);
static inline void change_sign16_swap_bytes_le(u_char *, int);
static inline void change_sign16_swap_bytes_be(u_char *, int);
static inline void swap_bytes_change_sign32_le(u_char *, int);
static inline void swap_bytes_change_sign32_be(u_char *, int);
static inline void change_sign32_swap_bytes_le(u_char *, int);
static inline void change_sign32_swap_bytes_be(u_char *, int);

static inline void
change_sign8(u_char *p, int cc)
{
while (--cc >= 0) {
*p ^= 0x80;
++p;
}
}

static inline void
change_sign16_le(u_char *p, int cc)
{
while ((cc -= 2) >= 0) {
p[1] ^= 0x80;
p += 2;
}
}

static inline void
change_sign16_be(u_char *p, int cc)
{
while ((cc -= 2) >= 0) {
p[0] ^= 0x80;
p += 2;
}
}

static inline void
change_sign24_le(u_char *p, int cc)
{
while ((cc -= 3) >= 0) {
p[2] ^= 0x80;
p += 3;
}
}

static inline void
change_sign24_be(u_char *p, int cc)
{
while ((cc -= 3) >= 0) {
p[0] ^= 0x80;
p += 3;
}
}

static inline void
change_sign32_le(u_char *p, int cc)
{
while ((cc -= 4) >= 0) {
p[3] ^= 0x80;
p += 4;
}
}

static inline void
change_sign32_be(u_char *p, int cc)
{
while ((cc -= 4) >= 0) {
p[0] ^= 0x80;
p += 4;
}
}

static inline void
swap_bytes(u_char *p, int cc)
{
u_char t;

while ((cc -= 2) >= 0) {
t = p[0];
p[0] = p[1];
p[1] = t;
p += 2;
}
}

static inline void
swap_bytes32(u_char *p, int cc)
{
u_char t;

while ((cc -= 4) >= 0) {
t = p[0];
p[0] = p[3];
p[3] = t;
t = p[1];
p[1] = p[2];
p[2] = t;
p += 4;
}
}

static inline void
swap_bytes_change_sign16_le(u_char *p, int cc)
{
u_char t;

while ((cc -= 2) >= 0) {
t = p[1];
p[1] = p[0] ^ 0x80;
p[0] = t;
p += 2;
}
}

static inline void
swap_bytes_change_sign16_be(u_char *p, int cc)
{
u_char t;

while ((cc -= 2) >= 0) {
t = p[0];
p[0] = p[1] ^ 0x80;
p[1] = t;
p += 2;
}
}

static inline void
change_sign16_swap_bytes_le(u_char *p, int cc)
{
swap_bytes_change_sign16_be(p, cc);
}

static inline void
change_sign16_swap_bytes_be(u_char *p, int cc)
{
swap_bytes_change_sign16_le(p, cc);
}

static inline void
swap_bytes_change_sign24_le(u_char *p, int cc)
{
u_char t;

while ((cc -= 3) >= 0) {
t = p[2];
p[2] = p[0] ^ 0x80;
p[0] = t;
p += 3;
}
}

static inline void
swap_bytes_change_sign24_be(u_char *p, int cc)
{
u_char t;

while ((cc -= 3) >= 0) {
t = p[0];
p[0] = p[2] ^ 0x80;
p[2] = t;
p += 3;
}
}

static inline void
change_sign24_swap_bytes_le(u_char *p, int cc)
{
swap_bytes_change_sign24_be(p, cc);
}

static inline void
change_sign24_swap_bytes_be(u_char *p, int cc)
{
swap_bytes_change_sign24_le(p, cc);
}

static inline void
swap_bytes_change_sign32_le(u_char *p, int cc)
{
u_char t;

while ((cc -= 4) >= 0) {
t = p[3];
p[3] = p[0] ^ 0x80;
p[0] = t;
t = p[1];
p[1] = p[2];
p[2] = t;
p += 4;
}
}

static inline void
swap_bytes_change_sign32_be(u_char *p, int cc)
{
u_char t;

while ((cc -= 4) >= 0) {
t = p[0];
p[0] = p[3] ^ 0x80;
p[3] = t;
t = p[1];
p[1] = p[2];
p[2] = t;
p += 4;
}
}

static inline void
change_sign32_swap_bytes_le(u_char *p, int cc)
{
swap_bytes_change_sign32_be(p, cc);
}

static inline void
change_sign32_swap_bytes_be(u_char *p, int cc)
{
swap_bytes_change_sign32_le(p, cc);
}