/* $NetBSD: mulaw.c,v 1.6 1997/06/14 22:25:11 thorpej Exp $ */ /* * Copyright (c) 1991-1993 Regents of the University of California. * 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 #include #include #include static u_char mulawtolin[256] = { 128, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 112, 113, 113, 114, 114, 115, 115, 116, 116, 117, 117, 118, 118, 119, 119, 120, 120, 120, 121, 121, 121, 121, 122, 122, 122, 122, 123, 123, 123, 123, 124, 124, 124, 124, 124, 125, 125, 125, 125, 125, 125, 125, 125, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 255, 251, 247, 243, 239, 235, 231, 227, 223, 219, 215, 211, 207, 203, 199, 195, 191, 189, 187, 185, 183, 181, 179, 177, 175, 173, 171, 169, 167, 165, 163, 161, 159, 158, 157, 156, 155, 154, 153, 152, 151, 150, 149, 148, 147, 146, 145, 144, 143, 143, 142, 142, 141, 141, 140, 140, 139, 139, 138, 138, 137, 137, 136, 136, 135, 135, 135, 134, 134, 134, 134, 133, 133, 133, 133, 132, 132, 132, 132, 131, 131, 131, 131, 131, 130, 130, 130, 130, 130, 130, 130, 130, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, }; static u_char lintomulaw[256] = { 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 52, 54, 56, 58, 60, 62, 65, 69, 73, 77, 83, 91, 103, 255, 231, 219, 211, 205, 201, 197, 193, 190, 188, 186, 184, 182, 180, 178, 176, 175, 174, 173, 172, 171, 170, 169, 168, 167, 166, 165, 164, 163, 162, 161, 160, 159, 159, 158, 158, 157, 157, 156, 156, 155, 155, 154, 154, 153, 153, 152, 152, 151, 151, 150, 150, 149, 149, 148, 148, 147, 147, 146, 146, 145, 145, 144, 144, 143, 143, 143, 143, 142, 142, 142, 142, 141, 141, 141, 141, 140, 140, 140, 140, 139, 139, 139, 139, 138, 138, 138, 138, 137, 137, 137, 137, 136, 136, 136, 136, 135, 135, 135, 135, 134, 134, 134, 134, 133, 133, 133, 133, 132, 132, 132, 132, 131, 131, 131, 131, 130, 130, 130, 130, 129, 129, 129, 129, 128, 128, 128, 128, }; static u_char alawtolin[256] = { 107, 108, 105, 106, 111, 112, 109, 110, 99, 100, 97, 98, 103, 104, 101, 102, 118, 118, 117, 117, 120, 120, 119, 119, 114, 114, 113, 113, 116, 116, 115, 115, 42, 46, 34, 38, 58, 62, 50, 54, 10, 14, 2, 6, 26, 30, 18, 22, 85, 87, 81, 83, 93, 95, 89, 91, 69, 71, 65, 67, 77, 79, 73, 75, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 123, 123, 123, 123, 124, 124, 124, 124, 121, 121, 121, 121, 122, 122, 122, 122, 126, 126, 126, 126, 126, 126, 126, 126, 125, 125, 125, 125, 125, 125, 125, 125, 149, 148, 151, 150, 145, 144, 147, 146, 157, 156, 159, 158, 153, 152, 155, 154, 138, 138, 139, 139, 136, 136, 137, 137, 142, 142, 143, 143, 140, 140, 141, 141, 214, 210, 222, 218, 198, 194, 206, 202, 246, 242, 254, 250, 230, 226, 238, 234, 171, 169, 175, 173, 163, 161, 167, 165, 187, 185, 191, 189, 179, 177, 183, 181, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 133, 133, 133, 133, 132, 132, 132, 132, 135, 135, 135, 135, 134, 134, 134, 134, 130, 130, 130, 130, 130, 130, 130, 130, 131, 131, 131, 131, 131, 131, 131, 131, }; static u_char lintoalaw[256] = { 42, 42, 42, 42, 43, 43, 43, 43, 40, 40, 40, 40, 41, 41, 41, 41, 46, 46, 46, 46, 47, 47, 47, 47, 44, 44, 44, 44, 45, 45, 45, 45, 34, 34, 34, 34, 35, 35, 35, 35, 32, 32, 32, 32, 33, 33, 33, 33, 38, 38, 38, 38, 39, 39, 39, 39, 36, 36, 36, 36, 37, 37, 37, 37, 58, 58, 59, 59, 56, 56, 57, 57, 62, 62, 63, 63, 60, 60, 61, 61, 50, 50, 51, 51, 48, 48, 49, 49, 54, 54, 55, 55, 52, 52, 53, 53, 10, 11, 8, 9, 14, 15, 12, 13, 2, 3, 0, 1, 6, 7, 4, 5, 26, 24, 30, 28, 18, 16, 22, 20, 106, 110, 98, 102, 122, 114, 74, 90, 213, 197, 245, 253, 229, 225, 237, 233, 149, 151, 145, 147, 157, 159, 153, 155, 133, 132, 135, 134, 129, 128, 131, 130, 141, 140, 143, 142, 137, 136, 139, 138, 181, 181, 180, 180, 183, 183, 182, 182, 177, 177, 176, 176, 179, 179, 178, 178, 189, 189, 188, 188, 191, 191, 190, 190, 185, 185, 184, 184, 187, 187, 186, 186, 165, 165, 165, 165, 164, 164, 164, 164, 167, 167, 167, 167, 166, 166, 166, 166, 161, 161, 161, 161, 160, 160, 160, 160, 163, 163, 163, 163, 162, 162, 162, 162, 173, 173, 173, 173, 172, 172, 172, 172, 175, 175, 175, 175, 174, 174, 174, 174, 169, 169, 169, 169, 168, 168, 168, 168, 171, 171, 171, 171, 170, 170, 170, 170, }; void mulaw_to_ulinear8(v, p, cc) void *v; u_char *p; int cc; { while (--cc >= 0) { *p = mulawtolin[*p]; ++p; } } void ulinear8_to_mulaw(v, p, cc) void *v; u_char *p; int cc; { while (--cc >= 0) { *p = lintomulaw[*p]; ++p; } } void alaw_to_ulinear8(v, p, cc) void *v; u_char *p; int cc; { while (--cc >= 0) { *p = alawtolin[*p]; ++p; } } void ulinear8_to_alaw(v, p, cc) void *v; u_char *p; int cc; { while (--cc >= 0) { *p = lintoalaw[*p]; ++p; } } void change_sign8(v, p, cc) void *v; u_char *p; int cc; { while (--cc >= 0) { *p = *p ^ 0x80; ++p; } } void change_sign16(v, p, cc) void *v; u_char *p; int cc; { #if BYTE_ORDER == LITTLE_ENDIAN while ((cc -=2) >= 0) { p[1] = p[1] ^ 0x80; p += 2; } #else while ((cc -=2) >= 0) { *p = *p ^ 0x80; p += 2; } #endif } 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; { swap_bytes(v, p, cc); change_sign16(v, p, cc); } void change_sign16_swap_bytes(v, p, cc) void *v; u_char *p; int cc; { change_sign16(v, p, cc); swap_bytes(v, p, cc); }