1 /* $NetBSD: auconv.h,v 1.6 2023/04/15 12:39:44 mlelstv Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/audioio.h> 34 35 /* Convert between signed and unsigned. */ 36 static inline void change_sign8(u_char *, int); 37 static inline void change_sign16_le(u_char *, int); 38 static inline void change_sign16_be(u_char *, int); 39 static inline void change_sign32_le(u_char *, int); 40 static inline void change_sign32_be(u_char *, int); 41 /* Convert between little and big endian. */ 42 static inline void swap_bytes(u_char *, int); 43 static inline void swap_bytes32(u_char *, int); 44 static inline void swap_bytes_change_sign16_le(u_char *, int); 45 static inline void swap_bytes_change_sign16_be(u_char *, int); 46 static inline void change_sign16_swap_bytes_le(u_char *, int); 47 static inline void change_sign16_swap_bytes_be(u_char *, int); 48 static inline void swap_bytes_change_sign32_le(u_char *, int); 49 static inline void swap_bytes_change_sign32_be(u_char *, int); 50 static inline void change_sign32_swap_bytes_le(u_char *, int); 51 static inline void change_sign32_swap_bytes_be(u_char *, int); 52 53 static inline void 54 change_sign8(u_char *p, int cc) 55 { 56 while (--cc >= 0) { 57 *p ^= 0x80; 58 ++p; 59 } 60 } 61 62 static inline void 63 change_sign16_le(u_char *p, int cc) 64 { 65 while ((cc -= 2) >= 0) { 66 p[1] ^= 0x80; 67 p += 2; 68 } 69 } 70 71 static inline void 72 change_sign16_be(u_char *p, int cc) 73 { 74 while ((cc -= 2) >= 0) { 75 p[0] ^= 0x80; 76 p += 2; 77 } 78 } 79 80 static inline void 81 change_sign24_le(u_char *p, int cc) 82 { 83 while ((cc -= 3) >= 0) { 84 p[2] ^= 0x80; 85 p += 3; 86 } 87 } 88 89 static inline void 90 change_sign24_be(u_char *p, int cc) 91 { 92 while ((cc -= 3) >= 0) { 93 p[0] ^= 0x80; 94 p += 3; 95 } 96 } 97 98 static inline void 99 change_sign32_le(u_char *p, int cc) 100 { 101 while ((cc -= 4) >= 0) { 102 p[3] ^= 0x80; 103 p += 4; 104 } 105 } 106 107 static inline void 108 change_sign32_be(u_char *p, int cc) 109 { 110 while ((cc -= 4) >= 0) { 111 p[0] ^= 0x80; 112 p += 4; 113 } 114 } 115 116 static inline void 117 swap_bytes(u_char *p, int cc) 118 { 119 u_char t; 120 121 while ((cc -= 2) >= 0) { 122 t = p[0]; 123 p[0] = p[1]; 124 p[1] = t; 125 p += 2; 126 } 127 } 128 129 static inline void 130 swap_bytes32(u_char *p, int cc) 131 { 132 u_char t; 133 134 while ((cc -= 4) >= 0) { 135 t = p[0]; 136 p[0] = p[3]; 137 p[3] = t; 138 t = p[1]; 139 p[1] = p[2]; 140 p[2] = t; 141 p += 4; 142 } 143 } 144 145 static inline void 146 swap_bytes_change_sign16_le(u_char *p, int cc) 147 { 148 u_char t; 149 150 while ((cc -= 2) >= 0) { 151 t = p[1]; 152 p[1] = p[0] ^ 0x80; 153 p[0] = t; 154 p += 2; 155 } 156 } 157 158 static inline void 159 swap_bytes_change_sign16_be(u_char *p, int cc) 160 { 161 u_char t; 162 163 while ((cc -= 2) >= 0) { 164 t = p[0]; 165 p[0] = p[1] ^ 0x80; 166 p[1] = t; 167 p += 2; 168 } 169 } 170 171 static inline void 172 change_sign16_swap_bytes_le(u_char *p, int cc) 173 { 174 swap_bytes_change_sign16_be(p, cc); 175 } 176 177 static inline void 178 change_sign16_swap_bytes_be(u_char *p, int cc) 179 { 180 swap_bytes_change_sign16_le(p, cc); 181 } 182 183 static inline void 184 swap_bytes_change_sign24_le(u_char *p, int cc) 185 { 186 u_char t; 187 188 while ((cc -= 3) >= 0) { 189 t = p[2]; 190 p[2] = p[0] ^ 0x80; 191 p[0] = t; 192 p += 3; 193 } 194 } 195 196 static inline void 197 swap_bytes_change_sign24_be(u_char *p, int cc) 198 { 199 u_char t; 200 201 while ((cc -= 3) >= 0) { 202 t = p[0]; 203 p[0] = p[2] ^ 0x80; 204 p[2] = t; 205 p += 3; 206 } 207 } 208 209 static inline void 210 change_sign24_swap_bytes_le(u_char *p, int cc) 211 { 212 swap_bytes_change_sign24_be(p, cc); 213 } 214 215 static inline void 216 change_sign24_swap_bytes_be(u_char *p, int cc) 217 { 218 swap_bytes_change_sign24_le(p, cc); 219 } 220 221 static inline void 222 swap_bytes_change_sign32_le(u_char *p, int cc) 223 { 224 u_char t; 225 226 while ((cc -= 4) >= 0) { 227 t = p[3]; 228 p[3] = p[0] ^ 0x80; 229 p[0] = t; 230 t = p[1]; 231 p[1] = p[2]; 232 p[2] = t; 233 p += 4; 234 } 235 } 236 237 static inline void 238 swap_bytes_change_sign32_be(u_char *p, int cc) 239 { 240 u_char t; 241 242 while ((cc -= 4) >= 0) { 243 t = p[0]; 244 p[0] = p[3] ^ 0x80; 245 p[3] = t; 246 t = p[1]; 247 p[1] = p[2]; 248 p[2] = t; 249 p += 4; 250 } 251 } 252 253 static inline void 254 change_sign32_swap_bytes_le(u_char *p, int cc) 255 { 256 swap_bytes_change_sign32_be(p, cc); 257 } 258 259 static inline void 260 change_sign32_swap_bytes_be(u_char *p, int cc) 261 { 262 swap_bytes_change_sign32_le(p, cc); 263 } 264
Indexes created Tue Sep 23 22:09:46 GMT 2025