FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/pcm.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2006-2009 Ariff Abdullah <ariff@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #ifndef _SND_PCM_H_
32 #define _SND_PCM_H_
33
34 #include <sys/param.h>
35
36 /*
37 * Macros for reading/writing PCM sample / int values from bytes array.
38 * Since every process is done using signed integer (and to make our life
39 * less miserable), unsigned sample will be converted to its signed
40 * counterpart and restored during writing back. To avoid overflow,
41 * we truncate 32bit (and only 32bit) samples down to 24bit (see below
42 * for the reason), unless SND_PCM_64 is defined.
43 */
44
45 /*
46 * Automatically turn on 64bit arithmetic on suitable archs
47 * (amd64 64bit, etc..) for wider 32bit samples / integer processing.
48 */
49 #if LONG_BIT >= 64
50 #undef SND_PCM_64
51 #define SND_PCM_64 1
52 #endif
53
54 typedef int32_t intpcm_t;
55
56 typedef int32_t intpcm8_t;
57 typedef int32_t intpcm16_t;
58 typedef int32_t intpcm24_t;
59
60 typedef uint32_t uintpcm_t;
61
62 typedef uint32_t uintpcm8_t;
63 typedef uint32_t uintpcm16_t;
64 typedef uint32_t uintpcm24_t;
65
66 #ifdef SND_PCM_64
67 typedef int64_t intpcm32_t;
68 typedef uint64_t uintpcm32_t;
69 #else
70 typedef int32_t intpcm32_t;
71 typedef uint32_t uintpcm32_t;
72 #endif
73
74 typedef int64_t intpcm64_t;
75 typedef uint64_t uintpcm64_t;
76
77 /* 32bit fixed point shift */
78 #define PCM_FXSHIFT 8
79
80 #define PCM_S8_MAX 0x7f
81 #define PCM_S8_MIN -0x80
82 #define PCM_S16_MAX 0x7fff
83 #define PCM_S16_MIN -0x8000
84 #define PCM_S24_MAX 0x7fffff
85 #define PCM_S24_MIN -0x800000
86 #ifdef SND_PCM_64
87 #if LONG_BIT >= 64
88 #define PCM_S32_MAX 0x7fffffffL
89 #define PCM_S32_MIN -0x80000000L
90 #else
91 #define PCM_S32_MAX 0x7fffffffLL
92 #define PCM_S32_MIN -0x80000000LL
93 #endif
94 #else
95 #define PCM_S32_MAX 0x7fffffff
96 #define PCM_S32_MIN (-0x7fffffff - 1)
97 #endif
98
99 /* Bytes-per-sample definition */
100 #define PCM_8_BPS 1
101 #define PCM_16_BPS 2
102 #define PCM_24_BPS 3
103 #define PCM_32_BPS 4
104
105 #define INTPCM_T(v) ((intpcm_t)(v))
106 #define INTPCM8_T(v) ((intpcm8_t)(v))
107 #define INTPCM16_T(v) ((intpcm16_t)(v))
108 #define INTPCM24_T(v) ((intpcm24_t)(v))
109 #define INTPCM32_T(v) ((intpcm32_t)(v))
110
111 #if BYTE_ORDER == LITTLE_ENDIAN
112 #define _PCM_READ_S16_LE(b8) INTPCM_T(*((int16_t *)(b8)))
113 #define _PCM_READ_S32_LE(b8) INTPCM_T(*((int32_t *)(b8)))
114 #define _PCM_READ_S16_BE(b8) \
115 INTPCM_T((b8)[1] | (((int8_t)((b8)[0])) << 8))
116 #define _PCM_READ_S32_BE(b8) \
117 INTPCM_T((b8)[3] | ((b8)[2] << 8) | ((b8)[1] << 16) | \
118 (((int8_t)((b8)[0])) << 24))
119
120 #define _PCM_WRITE_S16_LE(b8, val) do { \
121 *((int16_t *)(b8)) = (val); \
122 } while (0)
123 #define _PCM_WRITE_S32_LE(b8, val) do { \
124 *((int32_t *)(b8)) = (val); \
125 } while (0)
126 #define _PCM_WRITE_S16_BE(bb8, vval) do { \
127 intpcm_t val = (vval); \
128 uint8_t *b8 = (bb8); \
129 b8[1] = val; \
130 b8[0] = val >> 8; \
131 } while (0)
132 #define _PCM_WRITE_S32_BE(bb8, vval) do { \
133 intpcm_t val = (vval); \
134 uint8_t *b8 = (bb8); \
135 b8[3] = val; \
136 b8[2] = val >> 8; \
137 b8[1] = val >> 16; \
138 b8[0] = val >> 24; \
139 } while (0)
140
141 #define _PCM_READ_U16_LE(b8) \
142 INTPCM_T((int16_t)(*((uint16_t *)(b8)) ^ 0x8000))
143 #define _PCM_READ_U32_LE(b8) \
144 INTPCM_T((int32_t)(*((uint32_t *)(b8)) ^ 0x80000000))
145 #define _PCM_READ_U16_BE(b8) \
146 INTPCM_T((b8)[1] | (((int8_t)((b8)[0] ^ 0x80)) << 8))
147 #define _PCM_READ_U32_BE(b8) \
148 INTPCM_T((b8)[3] | ((b8)[2] << 8) | ((b8)[1] << 16) | \
149 (((int8_t)((b8)[0] ^ 0x80)) << 24))
150
151 #define _PCM_WRITE_U16_LE(b8, val) do { \
152 *((uint16_t *)(b8)) = (val) ^ 0x8000; \
153 } while (0)
154 #define _PCM_WRITE_U32_LE(b8, val) do { \
155 *((uint32_t *)(b8)) = (val) ^ 0x80000000; \
156 } while (0)
157 #define _PCM_WRITE_U16_BE(bb8, vval) do { \
158 intpcm_t val = (vval); \
159 uint8_t *b8 = (bb8); \
160 b8[1] = val; \
161 b8[0] = (val >> 8) ^ 0x80; \
162 } while (0)
163 #define _PCM_WRITE_U32_BE(bb8, vval) do { \
164 intpcm_t val = (vval); \
165 uint8_t *b8 = (bb8); \
166 b8[3] = val; \
167 b8[2] = val >> 8; \
168 b8[1] = val >> 16; \
169 b8[0] = (val >> 24) ^ 0x80; \
170 } while (0)
171
172 #define _PCM_READ_S16_NE(b8) _PCM_READ_S16_LE(b8)
173 #define _PCM_READ_U16_NE(b8) _PCM_READ_U16_LE(b8)
174 #define _PCM_READ_S32_NE(b8) _PCM_READ_S32_LE(b8)
175 #define _PCM_READ_U32_NE(b8) _PCM_READ_U32_LE(b8)
176 #define _PCM_WRITE_S16_NE(b6) _PCM_WRITE_S16_LE(b8)
177 #define _PCM_WRITE_U16_NE(b6) _PCM_WRITE_U16_LE(b8)
178 #define _PCM_WRITE_S32_NE(b6) _PCM_WRITE_S32_LE(b8)
179 #define _PCM_WRITE_U32_NE(b6) _PCM_WRITE_U32_LE(b8)
180 #else /* !LITTLE_ENDIAN */
181 #define _PCM_READ_S16_LE(b8) \
182 INTPCM_T((b8)[0] | (((int8_t)((b8)[1])) << 8))
183 #define _PCM_READ_S32_LE(b8) \
184 INTPCM_T((b8)[0] | ((b8)[1] << 8) | ((b8)[2] << 16) | \
185 (((int8_t)((b8)[3])) << 24))
186 #define _PCM_READ_S16_BE(b8) INTPCM_T(*((int16_t *)(b8)))
187 #define _PCM_READ_S32_BE(b8) INTPCM_T(*((int32_t *)(b8)))
188
189 #define _PCM_WRITE_S16_LE(bb8, vval) do { \
190 intpcm_t val = (vval); \
191 uint8_t *b8 = (bb8); \
192 b8[0] = val; \
193 b8[1] = val >> 8; \
194 } while (0)
195 #define _PCM_WRITE_S32_LE(bb8, vval) do { \
196 intpcm_t val = (vval); \
197 uint8_t *b8 = (bb8); \
198 b8[0] = val; \
199 b8[1] = val >> 8; \
200 b8[2] = val >> 16; \
201 b8[3] = val >> 24; \
202 } while (0)
203 #define _PCM_WRITE_S16_BE(b8, val) do { \
204 *((int16_t *)(b8)) = (val); \
205 } while (0)
206 #define _PCM_WRITE_S32_BE(b8, val) do { \
207 *((int32_t *)(b8)) = (val); \
208 } while (0)
209
210 #define _PCM_READ_U16_LE(b8) \
211 INTPCM_T((b8)[0] | (((int8_t)((b8)[1] ^ 0x80)) << 8))
212 #define _PCM_READ_U32_LE(b8) \
213 INTPCM_T((b8)[0] | ((b8)[1] << 8) | ((b8)[2] << 16) | \
214 (((int8_t)((b8)[3] ^ 0x80)) << 24))
215 #define _PCM_READ_U16_BE(b8) \
216 INTPCM_T((int16_t)(*((uint16_t *)(b8)) ^ 0x8000))
217 #define _PCM_READ_U32_BE(b8) \
218 INTPCM_T((int32_t)(*((uint32_t *)(b8)) ^ 0x80000000))
219
220 #define _PCM_WRITE_U16_LE(bb8, vval) do { \
221 intpcm_t val = (vval); \
222 uint8_t *b8 = (bb8); \
223 b8[0] = val; \
224 b8[1] = (val >> 8) ^ 0x80; \
225 } while (0)
226 #define _PCM_WRITE_U32_LE(bb8, vval) do { \
227 intpcm_t val = (vval); \
228 uint8_t *b8 = (bb8); \
229 b8[0] = val; \
230 b8[1] = val >> 8; \
231 b8[2] = val >> 16; \
232 b8[3] = (val >> 24) ^ 0x80; \
233 } while (0)
234 #define _PCM_WRITE_U16_BE(b8, val) do { \
235 *((uint16_t *)(b8)) = (val) ^ 0x8000; \
236 } while (0)
237 #define _PCM_WRITE_U32_BE(b8, val) do { \
238 *((uint32_t *)(b8)) = (val) ^ 0x80000000; \
239 } while (0)
240
241 #define _PCM_READ_S16_NE(b8) _PCM_READ_S16_BE(b8)
242 #define _PCM_READ_U16_NE(b8) _PCM_READ_U16_BE(b8)
243 #define _PCM_READ_S32_NE(b8) _PCM_READ_S32_BE(b8)
244 #define _PCM_READ_U32_NE(b8) _PCM_READ_U32_BE(b8)
245 #define _PCM_WRITE_S16_NE(b6) _PCM_WRITE_S16_BE(b8)
246 #define _PCM_WRITE_U16_NE(b6) _PCM_WRITE_U16_BE(b8)
247 #define _PCM_WRITE_S32_NE(b6) _PCM_WRITE_S32_BE(b8)
248 #define _PCM_WRITE_U32_NE(b6) _PCM_WRITE_U32_BE(b8)
249 #endif /* LITTLE_ENDIAN */
250
251 #define _PCM_READ_S24_LE(b8) \
252 INTPCM_T((b8)[0] | ((b8)[1] << 8) | (((int8_t)((b8)[2])) << 16))
253 #define _PCM_READ_S24_BE(b8) \
254 INTPCM_T((b8)[2] | ((b8)[1] << 8) | (((int8_t)((b8)[0])) << 16))
255
256 #define _PCM_WRITE_S24_LE(bb8, vval) do { \
257 intpcm_t val = (vval); \
258 uint8_t *b8 = (bb8); \
259 b8[0] = val; \
260 b8[1] = val >> 8; \
261 b8[2] = val >> 16; \
262 } while (0)
263 #define _PCM_WRITE_S24_BE(bb8, vval) do { \
264 intpcm_t val = (vval); \
265 uint8_t *b8 = (bb8); \
266 b8[2] = val; \
267 b8[1] = val >> 8; \
268 b8[0] = val >> 16; \
269 } while (0)
270
271 #define _PCM_READ_U24_LE(b8) \
272 INTPCM_T((b8)[0] | ((b8)[1] << 8) | \
273 (((int8_t)((b8)[2] ^ 0x80)) << 16))
274 #define _PCM_READ_U24_BE(b8) \
275 INTPCM_T((b8)[2] | ((b8)[1] << 8) | \
276 (((int8_t)((b8)[0] ^ 0x80)) << 16))
277
278 #define _PCM_WRITE_U24_LE(bb8, vval) do { \
279 intpcm_t val = (vval); \
280 uint8_t *b8 = (bb8); \
281 b8[0] = val; \
282 b8[1] = val >> 8; \
283 b8[2] = (val >> 16) ^ 0x80; \
284 } while (0)
285 #define _PCM_WRITE_U24_BE(bb8, vval) do { \
286 intpcm_t val = (vval); \
287 uint8_t *b8 = (bb8); \
288 b8[2] = val; \
289 b8[1] = val >> 8; \
290 b8[0] = (val >> 16) ^ 0x80; \
291 } while (0)
292
293 #if BYTE_ORDER == LITTLE_ENDIAN
294 #define _PCM_READ_S24_NE(b8) _PCM_READ_S24_LE(b8)
295 #define _PCM_READ_U24_NE(b8) _PCM_READ_U24_LE(b8)
296 #define _PCM_WRITE_S24_NE(b6) _PCM_WRITE_S24_LE(b8)
297 #define _PCM_WRITE_U24_NE(b6) _PCM_WRITE_U24_LE(b8)
298 #else /* !LITTLE_ENDIAN */
299 #define _PCM_READ_S24_NE(b8) _PCM_READ_S24_BE(b8)
300 #define _PCM_READ_U24_NE(b8) _PCM_READ_U24_BE(b8)
301 #define _PCM_WRITE_S24_NE(b6) _PCM_WRITE_S24_BE(b8)
302 #define _PCM_WRITE_U24_NE(b6) _PCM_WRITE_U24_BE(b8)
303 #endif /* LITTLE_ENDIAN */
304 /*
305 * 8bit sample is pretty much useless since it doesn't provide
306 * sufficient dynamic range throughout our filtering process.
307 * For the sake of completeness, declare it anyway.
308 */
309 #define _PCM_READ_S8_NE(b8) INTPCM_T(*((int8_t *)(b8)))
310 #define _PCM_READ_U8_NE(b8) \
311 INTPCM_T((int8_t)(*((uint8_t *)(b8)) ^ 0x80))
312
313 #define _PCM_WRITE_S8_NE(b8, val) do { \
314 *((int8_t *)(b8)) = (val); \
315 } while (0)
316 #define _PCM_WRITE_U8_NE(b8, val) do { \
317 *((uint8_t *)(b8)) = (val) ^ 0x80; \
318 } while (0)
319
320 /*
321 * Common macross. Use this instead of "_", unless we want
322 * the real sample value.
323 */
324
325 /* 8bit */
326 #define PCM_READ_S8_NE(b8) _PCM_READ_S8_NE(b8)
327 #define PCM_READ_U8_NE(b8) _PCM_READ_U8_NE(b8)
328 #define PCM_WRITE_S8_NE(b8, val) _PCM_WRITE_S8_NE(b8, val)
329 #define PCM_WRITE_U8_NE(b8, val) _PCM_WRITE_U8_NE(b8, val)
330
331 /* 16bit */
332 #define PCM_READ_S16_LE(b8) _PCM_READ_S16_LE(b8)
333 #define PCM_READ_S16_BE(b8) _PCM_READ_S16_BE(b8)
334 #define PCM_READ_U16_LE(b8) _PCM_READ_U16_LE(b8)
335 #define PCM_READ_U16_BE(b8) _PCM_READ_U16_BE(b8)
336
337 #define PCM_WRITE_S16_LE(b8, val) _PCM_WRITE_S16_LE(b8, val)
338 #define PCM_WRITE_S16_BE(b8, val) _PCM_WRITE_S16_BE(b8, val)
339 #define PCM_WRITE_U16_LE(b8, val) _PCM_WRITE_U16_LE(b8, val)
340 #define PCM_WRITE_U16_BE(b8, val) _PCM_WRITE_U16_BE(b8, val)
341
342 #define PCM_READ_S16_NE(b8) _PCM_READ_S16_NE(b8)
343 #define PCM_READ_U16_NE(b8) _PCM_READ_U16_NE(b8)
344 #define PCM_WRITE_S16_NE(b8) _PCM_WRITE_S16_NE(b8)
345 #define PCM_WRITE_U16_NE(b8) _PCM_WRITE_U16_NE(b8)
346
347 /* 24bit */
348 #define PCM_READ_S24_LE(b8) _PCM_READ_S24_LE(b8)
349 #define PCM_READ_S24_BE(b8) _PCM_READ_S24_BE(b8)
350 #define PCM_READ_U24_LE(b8) _PCM_READ_U24_LE(b8)
351 #define PCM_READ_U24_BE(b8) _PCM_READ_U24_BE(b8)
352
353 #define PCM_WRITE_S24_LE(b8, val) _PCM_WRITE_S24_LE(b8, val)
354 #define PCM_WRITE_S24_BE(b8, val) _PCM_WRITE_S24_BE(b8, val)
355 #define PCM_WRITE_U24_LE(b8, val) _PCM_WRITE_U24_LE(b8, val)
356 #define PCM_WRITE_U24_BE(b8, val) _PCM_WRITE_U24_BE(b8, val)
357
358 #define PCM_READ_S24_NE(b8) _PCM_READ_S24_NE(b8)
359 #define PCM_READ_U24_NE(b8) _PCM_READ_U24_NE(b8)
360 #define PCM_WRITE_S24_NE(b8) _PCM_WRITE_S24_NE(b8)
361 #define PCM_WRITE_U24_NE(b8) _PCM_WRITE_U24_NE(b8)
362
363 /* 32bit */
364 #ifdef SND_PCM_64
365 #define PCM_READ_S32_LE(b8) _PCM_READ_S32_LE(b8)
366 #define PCM_READ_S32_BE(b8) _PCM_READ_S32_BE(b8)
367 #define PCM_READ_U32_LE(b8) _PCM_READ_U32_LE(b8)
368 #define PCM_READ_U32_BE(b8) _PCM_READ_U32_BE(b8)
369
370 #define PCM_WRITE_S32_LE(b8, val) _PCM_WRITE_S32_LE(b8, val)
371 #define PCM_WRITE_S32_BE(b8, val) _PCM_WRITE_S32_BE(b8, val)
372 #define PCM_WRITE_U32_LE(b8, val) _PCM_WRITE_U32_LE(b8, val)
373 #define PCM_WRITE_U32_BE(b8, val) _PCM_WRITE_U32_BE(b8, val)
374
375 #define PCM_READ_S32_NE(b8) _PCM_READ_S32_NE(b8)
376 #define PCM_READ_U32_NE(b8) _PCM_READ_U32_NE(b8)
377 #define PCM_WRITE_S32_NE(b8) _PCM_WRITE_S32_NE(b8)
378 #define PCM_WRITE_U32_NE(b8) _PCM_WRITE_U32_NE(b8)
379 #else /* !SND_PCM_64 */
380 /*
381 * 24bit integer ?!? This is quite unfortunate, eh? Get the fact straight:
382 * Dynamic range for:
383 * 1) Human =~ 140db
384 * 2) 16bit = 96db (close enough)
385 * 3) 24bit = 144db (perfect)
386 * 4) 32bit = 196db (way too much)
387 * 5) Bugs Bunny = Gazillion!@%$Erbzzztt-EINVAL db
388 * Since we're not Bugs Bunny ..uh..err.. avoiding 64bit arithmetic, 24bit
389 * is pretty much sufficient for our signed integer processing.
390 */
391 #define PCM_READ_S32_LE(b8) (_PCM_READ_S32_LE(b8) >> PCM_FXSHIFT)
392 #define PCM_READ_S32_BE(b8) (_PCM_READ_S32_BE(b8) >> PCM_FXSHIFT)
393 #define PCM_READ_U32_LE(b8) (_PCM_READ_U32_LE(b8) >> PCM_FXSHIFT)
394 #define PCM_READ_U32_BE(b8) (_PCM_READ_U32_BE(b8) >> PCM_FXSHIFT)
395
396 #define PCM_READ_S32_NE(b8) (_PCM_READ_S32_NE(b8) >> PCM_FXSHIFT)
397 #define PCM_READ_U32_NE(b8) (_PCM_READ_U32_NE(b8) >> PCM_FXSHIFT)
398
399 #define PCM_WRITE_S32_LE(b8, val) \
400 _PCM_WRITE_S32_LE(b8, (val) << PCM_FXSHIFT)
401 #define PCM_WRITE_S32_BE(b8, val) \
402 _PCM_WRITE_S32_BE(b8, (val) << PCM_FXSHIFT)
403 #define PCM_WRITE_U32_LE(b8, val) \
404 _PCM_WRITE_U32_LE(b8, (val) << PCM_FXSHIFT)
405 #define PCM_WRITE_U32_BE(b8, val) \
406 _PCM_WRITE_U32_BE(b8, (val) << PCM_FXSHIFT)
407
408 #define PCM_WRITE_S32_NE(b8, val) \
409 _PCM_WRITE_S32_NE(b8, (val) << PCM_FXSHIFT)
410 #define PCM_WRITE_U32_NE(b8, val) \
411 _PCM_WRITE_U32_NE(b8, (val) << PCM_FXSHIFT)
412 #endif /* SND_PCM_64 */
413
414 #define PCM_CLAMP_S8(val) \
415 (((val) > PCM_S8_MAX) ? PCM_S8_MAX : \
416 (((val) < PCM_S8_MIN) ? PCM_S8_MIN : (val)))
417 #define PCM_CLAMP_S16(val) \
418 (((val) > PCM_S16_MAX) ? PCM_S16_MAX : \
419 (((val) < PCM_S16_MIN) ? PCM_S16_MIN : (val)))
420 #define PCM_CLAMP_S24(val) \
421 (((val) > PCM_S24_MAX) ? PCM_S24_MAX : \
422 (((val) < PCM_S24_MIN) ? PCM_S24_MIN : (val)))
423
424 #ifdef SND_PCM_64
425 #define PCM_CLAMP_S32(val) \
426 (((val) > PCM_S32_MAX) ? PCM_S32_MAX : \
427 (((val) < PCM_S32_MIN) ? PCM_S32_MIN : (val)))
428 #else /* !SND_PCM_64 */
429 #define PCM_CLAMP_S32(val) \
430 (((val) > PCM_S24_MAX) ? PCM_S32_MAX : \
431 (((val) < PCM_S24_MIN) ? PCM_S32_MIN : \
432 ((val) << PCM_FXSHIFT)))
433 #endif /* SND_PCM_64 */
434
435 #define PCM_CLAMP_U8(val) PCM_CLAMP_S8(val)
436 #define PCM_CLAMP_U16(val) PCM_CLAMP_S16(val)
437 #define PCM_CLAMP_U24(val) PCM_CLAMP_S24(val)
438 #define PCM_CLAMP_U32(val) PCM_CLAMP_S32(val)
439
440 #endif /* !_SND_PCM_H_ */
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