diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/auconv.c | 152 | ||||
| -rw-r--r-- | sys/dev/auconv.h | 46 |
2 files changed, 198 insertions, 0 deletions
diff --git a/sys/dev/auconv.c b/sys/dev/auconv.c new file mode 100644 index 00000000000..d144027462c --- /dev/null +++ b/sys/dev/auconv.c @@ -0,0 +1,152 @@ +/* $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; + } +} diff --git a/sys/dev/auconv.h b/sys/dev/auconv.h new file mode 100644 index 00000000000..4e52bfdb62c --- /dev/null +++ b/sys/dev/auconv.h @@ -0,0 +1,46 @@ +/* $OpenBSD: auconv.h,v 1.1 1997/10/07 14:07:46 niklas Exp $ */ +/* $NetBSD: auconv.h,v 1.2 1997/08/24 22:20:25 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 NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 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 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. + */ + +/* Convert between signed and unsigned. */ +extern void change_sign8 __P((void *, u_char *, int)); +extern void change_sign16 __P((void *, u_char *, int)); +/* Convert between little and big endian. */ +extern void swap_bytes __P((void *, u_char *, int)); +extern void swap_bytes_change_sign16 __P((void *, u_char *, int)); +extern void change_sign16_swap_bytes __P((void *, u_char *, int)); +/* Byte expansion/contraction */ +extern void linear8_to_linear16 __P((void *, u_char *, int)); +extern void linear16_to_linear8 __P((void *, u_char *, int)); |