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1da177e4 LT |
1 | #ifndef __SOUND_PCM_PARAMS_H |
2 | #define __SOUND_PCM_PARAMS_H | |
3 | ||
4 | /* | |
5 | * PCM params helpers | |
6 | * Copyright (c) by Abramo Bagnara <abramo@alsa-project.org> | |
7 | * | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | * | |
23 | */ | |
24 | ||
877211f5 TI |
25 | extern int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, |
26 | snd_pcm_hw_param_t var, const struct snd_mask *val); | |
27 | extern unsigned int snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, | |
1da177e4 | 28 | snd_pcm_hw_param_t var, int *dir); |
877211f5 | 29 | extern unsigned int snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, |
1da177e4 | 30 | snd_pcm_hw_param_t var, int *dir); |
877211f5 | 31 | extern int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, |
1da177e4 | 32 | snd_pcm_hw_param_t var, unsigned int val, int dir); |
877211f5 | 33 | extern int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, |
1da177e4 | 34 | snd_pcm_hw_param_t var); |
877211f5 | 35 | extern int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, |
1da177e4 LT |
36 | snd_pcm_hw_param_t var, unsigned int val, int dir); |
37 | ||
38 | /* To share the same code we have alsa-lib */ | |
39 | #define INLINE static inline | |
40 | #define assert(a) (void)(a) | |
41 | ||
42 | #define SNDRV_MASK_BITS 64 /* we use so far 64bits only */ | |
43 | #define SNDRV_MASK_SIZE (SNDRV_MASK_BITS / 32) | |
44 | #define MASK_OFS(i) ((i) >> 5) | |
45 | #define MASK_BIT(i) (1U << ((i) & 31)) | |
46 | ||
47 | INLINE unsigned int ld2(u_int32_t v) | |
48 | { | |
49 | unsigned r = 0; | |
50 | ||
51 | if (v >= 0x10000) { | |
52 | v >>= 16; | |
53 | r += 16; | |
54 | } | |
55 | if (v >= 0x100) { | |
56 | v >>= 8; | |
57 | r += 8; | |
58 | } | |
59 | if (v >= 0x10) { | |
60 | v >>= 4; | |
61 | r += 4; | |
62 | } | |
63 | if (v >= 4) { | |
64 | v >>= 2; | |
65 | r += 2; | |
66 | } | |
67 | if (v >= 2) | |
68 | r++; | |
69 | return r; | |
70 | } | |
71 | ||
72 | INLINE size_t snd_mask_sizeof(void) | |
73 | { | |
877211f5 | 74 | return sizeof(struct snd_mask); |
1da177e4 LT |
75 | } |
76 | ||
877211f5 | 77 | INLINE void snd_mask_none(struct snd_mask *mask) |
1da177e4 LT |
78 | { |
79 | memset(mask, 0, sizeof(*mask)); | |
80 | } | |
81 | ||
877211f5 | 82 | INLINE void snd_mask_any(struct snd_mask *mask) |
1da177e4 LT |
83 | { |
84 | memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t)); | |
85 | } | |
86 | ||
877211f5 | 87 | INLINE int snd_mask_empty(const struct snd_mask *mask) |
1da177e4 LT |
88 | { |
89 | int i; | |
90 | for (i = 0; i < SNDRV_MASK_SIZE; i++) | |
91 | if (mask->bits[i]) | |
92 | return 0; | |
93 | return 1; | |
94 | } | |
95 | ||
877211f5 | 96 | INLINE unsigned int snd_mask_min(const struct snd_mask *mask) |
1da177e4 LT |
97 | { |
98 | int i; | |
99 | assert(!snd_mask_empty(mask)); | |
100 | for (i = 0; i < SNDRV_MASK_SIZE; i++) { | |
101 | if (mask->bits[i]) | |
102 | return ffs(mask->bits[i]) - 1 + (i << 5); | |
103 | } | |
104 | return 0; | |
105 | } | |
106 | ||
877211f5 | 107 | INLINE unsigned int snd_mask_max(const struct snd_mask *mask) |
1da177e4 LT |
108 | { |
109 | int i; | |
110 | assert(!snd_mask_empty(mask)); | |
111 | for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) { | |
112 | if (mask->bits[i]) | |
113 | return ld2(mask->bits[i]) + (i << 5); | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | ||
877211f5 | 118 | INLINE void snd_mask_set(struct snd_mask *mask, unsigned int val) |
1da177e4 LT |
119 | { |
120 | assert(val <= SNDRV_MASK_BITS); | |
121 | mask->bits[MASK_OFS(val)] |= MASK_BIT(val); | |
122 | } | |
123 | ||
877211f5 | 124 | INLINE void snd_mask_reset(struct snd_mask *mask, unsigned int val) |
1da177e4 LT |
125 | { |
126 | assert(val <= SNDRV_MASK_BITS); | |
127 | mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val); | |
128 | } | |
129 | ||
877211f5 | 130 | INLINE void snd_mask_set_range(struct snd_mask *mask, unsigned int from, unsigned int to) |
1da177e4 LT |
131 | { |
132 | unsigned int i; | |
133 | assert(to <= SNDRV_MASK_BITS && from <= to); | |
134 | for (i = from; i <= to; i++) | |
135 | mask->bits[MASK_OFS(i)] |= MASK_BIT(i); | |
136 | } | |
137 | ||
877211f5 | 138 | INLINE void snd_mask_reset_range(struct snd_mask *mask, unsigned int from, unsigned int to) |
1da177e4 LT |
139 | { |
140 | unsigned int i; | |
141 | assert(to <= SNDRV_MASK_BITS && from <= to); | |
142 | for (i = from; i <= to; i++) | |
143 | mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i); | |
144 | } | |
145 | ||
877211f5 | 146 | INLINE void snd_mask_leave(struct snd_mask *mask, unsigned int val) |
1da177e4 LT |
147 | { |
148 | unsigned int v; | |
149 | assert(val <= SNDRV_MASK_BITS); | |
150 | v = mask->bits[MASK_OFS(val)] & MASK_BIT(val); | |
151 | snd_mask_none(mask); | |
152 | mask->bits[MASK_OFS(val)] = v; | |
153 | } | |
154 | ||
877211f5 | 155 | INLINE void snd_mask_intersect(struct snd_mask *mask, const struct snd_mask *v) |
1da177e4 LT |
156 | { |
157 | int i; | |
158 | for (i = 0; i < SNDRV_MASK_SIZE; i++) | |
159 | mask->bits[i] &= v->bits[i]; | |
160 | } | |
161 | ||
877211f5 | 162 | INLINE int snd_mask_eq(const struct snd_mask *mask, const struct snd_mask *v) |
1da177e4 LT |
163 | { |
164 | return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t)); | |
165 | } | |
166 | ||
877211f5 | 167 | INLINE void snd_mask_copy(struct snd_mask *mask, const struct snd_mask *v) |
1da177e4 LT |
168 | { |
169 | *mask = *v; | |
170 | } | |
171 | ||
877211f5 | 172 | INLINE int snd_mask_test(const struct snd_mask *mask, unsigned int val) |
1da177e4 LT |
173 | { |
174 | assert(val <= SNDRV_MASK_BITS); | |
175 | return mask->bits[MASK_OFS(val)] & MASK_BIT(val); | |
176 | } | |
177 | ||
877211f5 | 178 | INLINE int snd_mask_single(const struct snd_mask *mask) |
1da177e4 LT |
179 | { |
180 | int i, c = 0; | |
181 | assert(!snd_mask_empty(mask)); | |
182 | for (i = 0; i < SNDRV_MASK_SIZE; i++) { | |
183 | if (! mask->bits[i]) | |
184 | continue; | |
185 | if (mask->bits[i] & (mask->bits[i] - 1)) | |
186 | return 0; | |
187 | if (c) | |
188 | return 0; | |
189 | c++; | |
190 | } | |
191 | return 1; | |
192 | } | |
193 | ||
877211f5 | 194 | INLINE int snd_mask_refine(struct snd_mask *mask, const struct snd_mask *v) |
1da177e4 | 195 | { |
877211f5 | 196 | struct snd_mask old; |
1da177e4 LT |
197 | assert(!snd_mask_empty(mask)); |
198 | snd_mask_copy(&old, mask); | |
199 | snd_mask_intersect(mask, v); | |
200 | if (snd_mask_empty(mask)) | |
201 | return -EINVAL; | |
202 | return !snd_mask_eq(mask, &old); | |
203 | } | |
204 | ||
877211f5 | 205 | INLINE int snd_mask_refine_first(struct snd_mask *mask) |
1da177e4 LT |
206 | { |
207 | assert(!snd_mask_empty(mask)); | |
208 | if (snd_mask_single(mask)) | |
209 | return 0; | |
210 | snd_mask_leave(mask, snd_mask_min(mask)); | |
211 | return 1; | |
212 | } | |
213 | ||
877211f5 | 214 | INLINE int snd_mask_refine_last(struct snd_mask *mask) |
1da177e4 LT |
215 | { |
216 | assert(!snd_mask_empty(mask)); | |
217 | if (snd_mask_single(mask)) | |
218 | return 0; | |
219 | snd_mask_leave(mask, snd_mask_max(mask)); | |
220 | return 1; | |
221 | } | |
222 | ||
877211f5 | 223 | INLINE int snd_mask_refine_min(struct snd_mask *mask, unsigned int val) |
1da177e4 LT |
224 | { |
225 | assert(!snd_mask_empty(mask)); | |
226 | if (snd_mask_min(mask) >= val) | |
227 | return 0; | |
228 | snd_mask_reset_range(mask, 0, val - 1); | |
229 | if (snd_mask_empty(mask)) | |
230 | return -EINVAL; | |
231 | return 1; | |
232 | } | |
233 | ||
877211f5 | 234 | INLINE int snd_mask_refine_max(struct snd_mask *mask, unsigned int val) |
1da177e4 LT |
235 | { |
236 | assert(!snd_mask_empty(mask)); | |
237 | if (snd_mask_max(mask) <= val) | |
238 | return 0; | |
239 | snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS); | |
240 | if (snd_mask_empty(mask)) | |
241 | return -EINVAL; | |
242 | return 1; | |
243 | } | |
244 | ||
877211f5 | 245 | INLINE int snd_mask_refine_set(struct snd_mask *mask, unsigned int val) |
1da177e4 LT |
246 | { |
247 | int changed; | |
248 | assert(!snd_mask_empty(mask)); | |
249 | changed = !snd_mask_single(mask); | |
250 | snd_mask_leave(mask, val); | |
251 | if (snd_mask_empty(mask)) | |
252 | return -EINVAL; | |
253 | return changed; | |
254 | } | |
255 | ||
877211f5 | 256 | INLINE int snd_mask_value(const struct snd_mask *mask) |
1da177e4 LT |
257 | { |
258 | assert(!snd_mask_empty(mask)); | |
259 | return snd_mask_min(mask); | |
260 | } | |
261 | ||
877211f5 | 262 | INLINE void snd_interval_any(struct snd_interval *i) |
1da177e4 LT |
263 | { |
264 | i->min = 0; | |
265 | i->openmin = 0; | |
266 | i->max = UINT_MAX; | |
267 | i->openmax = 0; | |
268 | i->integer = 0; | |
269 | i->empty = 0; | |
270 | } | |
271 | ||
877211f5 | 272 | INLINE void snd_interval_none(struct snd_interval *i) |
1da177e4 LT |
273 | { |
274 | i->empty = 1; | |
275 | } | |
276 | ||
877211f5 | 277 | INLINE int snd_interval_checkempty(const struct snd_interval *i) |
1da177e4 LT |
278 | { |
279 | return (i->min > i->max || | |
280 | (i->min == i->max && (i->openmin || i->openmax))); | |
281 | } | |
282 | ||
877211f5 | 283 | INLINE int snd_interval_empty(const struct snd_interval *i) |
1da177e4 LT |
284 | { |
285 | return i->empty; | |
286 | } | |
287 | ||
877211f5 | 288 | INLINE int snd_interval_single(const struct snd_interval *i) |
1da177e4 LT |
289 | { |
290 | assert(!snd_interval_empty(i)); | |
291 | return (i->min == i->max || | |
292 | (i->min + 1 == i->max && i->openmax)); | |
293 | } | |
294 | ||
877211f5 | 295 | INLINE int snd_interval_value(const struct snd_interval *i) |
1da177e4 LT |
296 | { |
297 | assert(snd_interval_single(i)); | |
298 | return i->min; | |
299 | } | |
300 | ||
877211f5 | 301 | INLINE int snd_interval_min(const struct snd_interval *i) |
1da177e4 LT |
302 | { |
303 | assert(!snd_interval_empty(i)); | |
304 | return i->min; | |
305 | } | |
306 | ||
877211f5 | 307 | INLINE int snd_interval_max(const struct snd_interval *i) |
1da177e4 LT |
308 | { |
309 | unsigned int v; | |
310 | assert(!snd_interval_empty(i)); | |
311 | v = i->max; | |
312 | if (i->openmax) | |
313 | v--; | |
314 | return v; | |
315 | } | |
316 | ||
877211f5 | 317 | INLINE int snd_interval_test(const struct snd_interval *i, unsigned int val) |
1da177e4 LT |
318 | { |
319 | return !((i->min > val || (i->min == val && i->openmin) || | |
320 | i->max < val || (i->max == val && i->openmax))); | |
321 | } | |
322 | ||
877211f5 | 323 | INLINE void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s) |
1da177e4 LT |
324 | { |
325 | *d = *s; | |
326 | } | |
327 | ||
877211f5 | 328 | INLINE int snd_interval_setinteger(struct snd_interval *i) |
1da177e4 LT |
329 | { |
330 | if (i->integer) | |
331 | return 0; | |
332 | if (i->openmin && i->openmax && i->min == i->max) | |
333 | return -EINVAL; | |
334 | i->integer = 1; | |
335 | return 1; | |
336 | } | |
337 | ||
877211f5 | 338 | INLINE int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2) |
1da177e4 LT |
339 | { |
340 | if (i1->empty) | |
341 | return i2->empty; | |
342 | if (i2->empty) | |
343 | return i1->empty; | |
344 | return i1->min == i2->min && i1->openmin == i2->openmin && | |
345 | i1->max == i2->max && i1->openmax == i2->openmax; | |
346 | } | |
347 | ||
348 | static inline unsigned int add(unsigned int a, unsigned int b) | |
349 | { | |
350 | if (a >= UINT_MAX - b) | |
351 | return UINT_MAX; | |
352 | return a + b; | |
353 | } | |
354 | ||
355 | static inline unsigned int sub(unsigned int a, unsigned int b) | |
356 | { | |
357 | if (a > b) | |
358 | return a - b; | |
359 | return 0; | |
360 | } | |
361 | ||
362 | #undef INLINE | |
363 | #undef assert | |
364 | ||
365 | #endif /* __SOUND_PCM_PARAMS_H */ | |
366 |