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Annotation of sys/dev/mulaw.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: mulaw.h,v 1.12 2005/04/14 01:24:20 pascoe Exp $ */
                      2: /*     $NetBSD: mulaw.h,v 1.11 1999/11/01 18:12:19 augustss Exp $      */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1996 The NetBSD Foundation, Inc.
                      6:  * All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to The NetBSD Foundation
                      9:  * by John T. Kohl.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *        This product includes software developed by the NetBSD
                     22:  *        Foundation, Inc. and its contributors.
                     23:  * 4. Neither the name of The NetBSD Foundation nor the names of its
                     24:  *    contributors may be used to endorse or promote products derived
                     25:  *    from this software without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     28:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     29:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     30:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     31:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     32:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     33:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     34:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     35:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     36:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     37:  * POSSIBILITY OF SUCH DAMAGE.
                     38:  */
                     39:
                     40: /* *_mts versions convert mono to stereo, in addition */
                     41:
                     42: /* Convert 8-bit mu-law to 16 bit unsigned linear. */
                     43: extern void mulaw_to_ulinear16_le(void *, u_char *, int);
                     44: extern void mulaw_to_ulinear16_le_mts(void *, u_char *, int);
                     45: extern void mulaw_to_ulinear16_be(void *, u_char *, int);
                     46: extern void mulaw_to_ulinear16_be_mts(void *, u_char *, int);
                     47: /* Convert 8-bit mu-law to/from 16 bit signed linear. */
                     48: extern void mulaw_to_slinear16_le(void *, u_char *, int);
                     49: extern void mulaw_to_slinear16_le_mts(void *, u_char *, int);
                     50: extern void mulaw_to_slinear16_be(void *, u_char *, int);
                     51: extern void mulaw_to_slinear16_be_mts(void *, u_char *, int);
                     52: extern void slinear16_to_mulaw_le(void *, u_char *, int);
                     53: /* Convert 8-bit mu-law to/from 8 bit unsigned linear. */
                     54: extern void mulaw_to_ulinear8(void *, u_char *, int);
                     55: extern void ulinear8_to_mulaw(void *, u_char *, int);
                     56: /* Convert 8-bit mu-law to/from 8 bit signed linear. */
                     57: extern void mulaw_to_slinear8(void *, u_char *, int);
                     58: extern void slinear8_to_mulaw(void *, u_char *, int);
                     59: /* Convert 8-bit a-law to 16 bit unsigned linear. */
                     60: extern void alaw_to_ulinear16_le(void *, u_char *, int);
                     61: extern void alaw_to_ulinear16_be(void *, u_char *, int);
                     62: /* Convert 8-bit a-law to/from 16 bit signed linear. */
                     63: extern void alaw_to_slinear16_le(void *, u_char *, int);
                     64: extern void alaw_to_slinear16_le_mts(void *, u_char *, int);
                     65: extern void alaw_to_slinear16_be(void *, u_char *, int);
                     66: extern void alaw_to_slinear16_be_mts(void *, u_char *, int);
                     67: extern void slinear16_to_alaw_le(void *, u_char *, int);
                     68: extern void slinear16_to_alaw_be(void *, u_char *, int);
                     69: /* Convert 8-bit a-law to/from 8 bit unsigned linear. */
                     70: extern void alaw_to_ulinear8(void *, u_char *, int);
                     71: extern void ulinear8_to_alaw(void *, u_char *, int);
                     72: /* Convert 8-bit a-law to/from 8 bit signed linear. */
                     73: extern void alaw_to_slinear8(void *, u_char *, int);
                     74: extern void slinear8_to_alaw(void *, u_char *, int);
                     75: /* Convert 8-bit a-law to/from mulaw */
                     76: void alaw_to_mulaw(void *, u_char *, int);
                     77: void mulaw_to_alaw(void *, u_char *, int);
                     78:
                     79: /* backwards compat for now */
                     80: #if BYTE_ORDER == LITTLE_ENDIAN
                     81: #define mulaw_to_ulinear16 mulaw_to_ulinear16_le
                     82: #define alaw_to_ulinear16 alaw_to_ulinear16_le
                     83: #define mulaw_to_slinear16 mulaw_to_slinear16_le
                     84: #define mulaw_to_slinear16_mts mulaw_to_slinear16_le_mts
                     85: #define alaw_to_slinear16 alaw_to_slinear16_le
                     86: #define alaw_to_slinear16_mts alaw_to_slinear16_le_mts
                     87: #else
                     88: #define mulaw_to_ulinear16 mulaw_to_ulinear16_be
                     89: #define alaw_to_ulinear16 alaw_to_ulinear16_be
                     90: #define mulaw_to_slinear16 mulaw_to_slinear16_be
                     91: #define mulaw_to_slinear16_mts mulaw_to_slinear16_be_mts
                     92: #define alaw_to_slinear16 alaw_to_slinear16_be
                     93: #define alaw_to_slinear16_mts alaw_to_slinear16_be_mts
                     94: #endif