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
change_sign8(u_char * p,int cc)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
change_sign16_le(u_char * p,int cc)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
change_sign16_be(u_char * p,int cc)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
change_sign24_le(u_char * p,int cc)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
change_sign24_be(u_char * p,int cc)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
change_sign32_le(u_char * p,int cc)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
change_sign32_be(u_char * p,int cc)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
swap_bytes(u_char * p,int cc)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
swap_bytes32(u_char * p,int cc)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
swap_bytes_change_sign16_le(u_char * p,int cc)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
swap_bytes_change_sign16_be(u_char * p,int cc)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
change_sign16_swap_bytes_le(u_char * p,int cc)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
change_sign16_swap_bytes_be(u_char * p,int cc)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
swap_bytes_change_sign24_le(u_char * p,int cc)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
swap_bytes_change_sign24_be(u_char * p,int cc)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
change_sign24_swap_bytes_le(u_char * p,int cc)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
change_sign24_swap_bytes_be(u_char * p,int cc)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
swap_bytes_change_sign32_le(u_char * p,int cc)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
swap_bytes_change_sign32_be(u_char * p,int cc)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
change_sign32_swap_bytes_le(u_char * p,int cc)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
change_sign32_swap_bytes_be(u_char * p,int cc)260 change_sign32_swap_bytes_be(u_char *p, int cc)
261 {
262 swap_bytes_change_sign32_le(p, cc);
263 }
264