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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 | ||
f3761c39 MB |
25 | #include <sound/pcm.h> |
26 | ||
e88e8ae6 TI |
27 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
28 | struct snd_pcm_hw_params *params, | |
29 | snd_pcm_hw_param_t var, int *dir); | |
30 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, | |
31 | struct snd_pcm_hw_params *params, | |
32 | snd_pcm_hw_param_t var, int *dir); | |
33 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, | |
34 | snd_pcm_hw_param_t var, int *dir); | |
1da177e4 | 35 | |
1da177e4 LT |
36 | #define SNDRV_MASK_BITS 64 /* we use so far 64bits only */ |
37 | #define SNDRV_MASK_SIZE (SNDRV_MASK_BITS / 32) | |
38 | #define MASK_OFS(i) ((i) >> 5) | |
39 | #define MASK_BIT(i) (1U << ((i) & 31)) | |
40 | ||
9bb22e21 | 41 | static inline unsigned int ld2(u_int32_t v) |
1da177e4 LT |
42 | { |
43 | unsigned r = 0; | |
44 | ||
45 | if (v >= 0x10000) { | |
46 | v >>= 16; | |
47 | r += 16; | |
48 | } | |
49 | if (v >= 0x100) { | |
50 | v >>= 8; | |
51 | r += 8; | |
52 | } | |
53 | if (v >= 0x10) { | |
54 | v >>= 4; | |
55 | r += 4; | |
56 | } | |
57 | if (v >= 4) { | |
58 | v >>= 2; | |
59 | r += 2; | |
60 | } | |
61 | if (v >= 2) | |
62 | r++; | |
63 | return r; | |
64 | } | |
65 | ||
9bb22e21 | 66 | static inline size_t snd_mask_sizeof(void) |
1da177e4 | 67 | { |
877211f5 | 68 | return sizeof(struct snd_mask); |
1da177e4 LT |
69 | } |
70 | ||
9bb22e21 | 71 | static inline void snd_mask_none(struct snd_mask *mask) |
1da177e4 LT |
72 | { |
73 | memset(mask, 0, sizeof(*mask)); | |
74 | } | |
75 | ||
9bb22e21 | 76 | static inline void snd_mask_any(struct snd_mask *mask) |
1da177e4 LT |
77 | { |
78 | memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t)); | |
79 | } | |
80 | ||
9bb22e21 | 81 | static inline int snd_mask_empty(const struct snd_mask *mask) |
1da177e4 LT |
82 | { |
83 | int i; | |
84 | for (i = 0; i < SNDRV_MASK_SIZE; i++) | |
85 | if (mask->bits[i]) | |
86 | return 0; | |
87 | return 1; | |
88 | } | |
89 | ||
9bb22e21 | 90 | static inline unsigned int snd_mask_min(const struct snd_mask *mask) |
1da177e4 LT |
91 | { |
92 | int i; | |
1da177e4 LT |
93 | for (i = 0; i < SNDRV_MASK_SIZE; i++) { |
94 | if (mask->bits[i]) | |
95 | return ffs(mask->bits[i]) - 1 + (i << 5); | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
9bb22e21 | 100 | static inline unsigned int snd_mask_max(const struct snd_mask *mask) |
1da177e4 LT |
101 | { |
102 | int i; | |
1da177e4 LT |
103 | for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) { |
104 | if (mask->bits[i]) | |
105 | return ld2(mask->bits[i]) + (i << 5); | |
106 | } | |
107 | return 0; | |
108 | } | |
109 | ||
9bb22e21 | 110 | static inline void snd_mask_set(struct snd_mask *mask, unsigned int val) |
1da177e4 | 111 | { |
1da177e4 LT |
112 | mask->bits[MASK_OFS(val)] |= MASK_BIT(val); |
113 | } | |
114 | ||
9bb22e21 | 115 | static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val) |
1da177e4 | 116 | { |
1da177e4 LT |
117 | mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val); |
118 | } | |
119 | ||
9bb22e21 TI |
120 | static inline void snd_mask_set_range(struct snd_mask *mask, |
121 | unsigned int from, unsigned int to) | |
1da177e4 LT |
122 | { |
123 | unsigned int i; | |
1da177e4 LT |
124 | for (i = from; i <= to; i++) |
125 | mask->bits[MASK_OFS(i)] |= MASK_BIT(i); | |
126 | } | |
127 | ||
9bb22e21 TI |
128 | static inline void snd_mask_reset_range(struct snd_mask *mask, |
129 | unsigned int from, unsigned int to) | |
1da177e4 LT |
130 | { |
131 | unsigned int i; | |
1da177e4 LT |
132 | for (i = from; i <= to; i++) |
133 | mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i); | |
134 | } | |
135 | ||
9bb22e21 | 136 | static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val) |
1da177e4 LT |
137 | { |
138 | unsigned int v; | |
1da177e4 LT |
139 | v = mask->bits[MASK_OFS(val)] & MASK_BIT(val); |
140 | snd_mask_none(mask); | |
141 | mask->bits[MASK_OFS(val)] = v; | |
142 | } | |
143 | ||
9bb22e21 TI |
144 | static inline void snd_mask_intersect(struct snd_mask *mask, |
145 | const struct snd_mask *v) | |
1da177e4 LT |
146 | { |
147 | int i; | |
148 | for (i = 0; i < SNDRV_MASK_SIZE; i++) | |
149 | mask->bits[i] &= v->bits[i]; | |
150 | } | |
151 | ||
9bb22e21 TI |
152 | static inline int snd_mask_eq(const struct snd_mask *mask, |
153 | const struct snd_mask *v) | |
1da177e4 LT |
154 | { |
155 | return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t)); | |
156 | } | |
157 | ||
9bb22e21 TI |
158 | static inline void snd_mask_copy(struct snd_mask *mask, |
159 | const struct snd_mask *v) | |
1da177e4 LT |
160 | { |
161 | *mask = *v; | |
162 | } | |
163 | ||
9bb22e21 | 164 | static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val) |
1da177e4 | 165 | { |
1da177e4 LT |
166 | return mask->bits[MASK_OFS(val)] & MASK_BIT(val); |
167 | } | |
168 | ||
9bb22e21 | 169 | static inline int snd_mask_single(const struct snd_mask *mask) |
1da177e4 LT |
170 | { |
171 | int i, c = 0; | |
1da177e4 LT |
172 | for (i = 0; i < SNDRV_MASK_SIZE; i++) { |
173 | if (! mask->bits[i]) | |
174 | continue; | |
175 | if (mask->bits[i] & (mask->bits[i] - 1)) | |
176 | return 0; | |
177 | if (c) | |
178 | return 0; | |
179 | c++; | |
180 | } | |
181 | return 1; | |
182 | } | |
183 | ||
9bb22e21 TI |
184 | static inline int snd_mask_refine(struct snd_mask *mask, |
185 | const struct snd_mask *v) | |
1da177e4 | 186 | { |
877211f5 | 187 | struct snd_mask old; |
1da177e4 LT |
188 | snd_mask_copy(&old, mask); |
189 | snd_mask_intersect(mask, v); | |
190 | if (snd_mask_empty(mask)) | |
191 | return -EINVAL; | |
192 | return !snd_mask_eq(mask, &old); | |
193 | } | |
194 | ||
9bb22e21 | 195 | static inline int snd_mask_refine_first(struct snd_mask *mask) |
1da177e4 | 196 | { |
1da177e4 LT |
197 | if (snd_mask_single(mask)) |
198 | return 0; | |
199 | snd_mask_leave(mask, snd_mask_min(mask)); | |
200 | return 1; | |
201 | } | |
202 | ||
9bb22e21 | 203 | static inline int snd_mask_refine_last(struct snd_mask *mask) |
1da177e4 | 204 | { |
1da177e4 LT |
205 | if (snd_mask_single(mask)) |
206 | return 0; | |
207 | snd_mask_leave(mask, snd_mask_max(mask)); | |
208 | return 1; | |
209 | } | |
210 | ||
9bb22e21 | 211 | static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val) |
1da177e4 | 212 | { |
1da177e4 LT |
213 | if (snd_mask_min(mask) >= val) |
214 | return 0; | |
215 | snd_mask_reset_range(mask, 0, val - 1); | |
216 | if (snd_mask_empty(mask)) | |
217 | return -EINVAL; | |
218 | return 1; | |
219 | } | |
220 | ||
9bb22e21 | 221 | static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val) |
1da177e4 | 222 | { |
1da177e4 LT |
223 | if (snd_mask_max(mask) <= val) |
224 | return 0; | |
225 | snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS); | |
226 | if (snd_mask_empty(mask)) | |
227 | return -EINVAL; | |
228 | return 1; | |
229 | } | |
230 | ||
9bb22e21 | 231 | static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val) |
1da177e4 LT |
232 | { |
233 | int changed; | |
1da177e4 LT |
234 | changed = !snd_mask_single(mask); |
235 | snd_mask_leave(mask, val); | |
236 | if (snd_mask_empty(mask)) | |
237 | return -EINVAL; | |
238 | return changed; | |
239 | } | |
240 | ||
9bb22e21 | 241 | static inline int snd_mask_value(const struct snd_mask *mask) |
1da177e4 | 242 | { |
1da177e4 LT |
243 | return snd_mask_min(mask); |
244 | } | |
245 | ||
9bb22e21 | 246 | static inline void snd_interval_any(struct snd_interval *i) |
1da177e4 LT |
247 | { |
248 | i->min = 0; | |
249 | i->openmin = 0; | |
250 | i->max = UINT_MAX; | |
251 | i->openmax = 0; | |
252 | i->integer = 0; | |
253 | i->empty = 0; | |
254 | } | |
255 | ||
9bb22e21 | 256 | static inline void snd_interval_none(struct snd_interval *i) |
1da177e4 LT |
257 | { |
258 | i->empty = 1; | |
259 | } | |
260 | ||
9bb22e21 | 261 | static inline int snd_interval_checkempty(const struct snd_interval *i) |
1da177e4 LT |
262 | { |
263 | return (i->min > i->max || | |
264 | (i->min == i->max && (i->openmin || i->openmax))); | |
265 | } | |
266 | ||
9bb22e21 | 267 | static inline int snd_interval_empty(const struct snd_interval *i) |
1da177e4 LT |
268 | { |
269 | return i->empty; | |
270 | } | |
271 | ||
9bb22e21 | 272 | static inline int snd_interval_single(const struct snd_interval *i) |
1da177e4 | 273 | { |
1da177e4 LT |
274 | return (i->min == i->max || |
275 | (i->min + 1 == i->max && i->openmax)); | |
276 | } | |
277 | ||
9bb22e21 | 278 | static inline int snd_interval_value(const struct snd_interval *i) |
1da177e4 | 279 | { |
1da177e4 LT |
280 | return i->min; |
281 | } | |
282 | ||
9bb22e21 | 283 | static inline int snd_interval_min(const struct snd_interval *i) |
1da177e4 | 284 | { |
1da177e4 LT |
285 | return i->min; |
286 | } | |
287 | ||
9bb22e21 | 288 | static inline int snd_interval_max(const struct snd_interval *i) |
1da177e4 LT |
289 | { |
290 | unsigned int v; | |
1da177e4 LT |
291 | v = i->max; |
292 | if (i->openmax) | |
293 | v--; | |
294 | return v; | |
295 | } | |
296 | ||
9bb22e21 | 297 | static inline int snd_interval_test(const struct snd_interval *i, unsigned int val) |
1da177e4 LT |
298 | { |
299 | return !((i->min > val || (i->min == val && i->openmin) || | |
300 | i->max < val || (i->max == val && i->openmax))); | |
301 | } | |
302 | ||
9bb22e21 | 303 | static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s) |
1da177e4 LT |
304 | { |
305 | *d = *s; | |
306 | } | |
307 | ||
9bb22e21 | 308 | static inline int snd_interval_setinteger(struct snd_interval *i) |
1da177e4 LT |
309 | { |
310 | if (i->integer) | |
311 | return 0; | |
312 | if (i->openmin && i->openmax && i->min == i->max) | |
313 | return -EINVAL; | |
314 | i->integer = 1; | |
315 | return 1; | |
316 | } | |
317 | ||
9bb22e21 | 318 | static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2) |
1da177e4 LT |
319 | { |
320 | if (i1->empty) | |
321 | return i2->empty; | |
322 | if (i2->empty) | |
323 | return i1->empty; | |
324 | return i1->min == i2->min && i1->openmin == i2->openmin && | |
325 | i1->max == i2->max && i1->openmax == i2->openmax; | |
326 | } | |
327 | ||
328 | static inline unsigned int add(unsigned int a, unsigned int b) | |
329 | { | |
330 | if (a >= UINT_MAX - b) | |
331 | return UINT_MAX; | |
332 | return a + b; | |
333 | } | |
334 | ||
335 | static inline unsigned int sub(unsigned int a, unsigned int b) | |
336 | { | |
337 | if (a > b) | |
338 | return a - b; | |
339 | return 0; | |
340 | } | |
341 | ||
b51beb75 TI |
342 | #define params_access(p) ((__force snd_pcm_access_t)\ |
343 | snd_mask_min(hw_param_mask_c((p), SNDRV_PCM_HW_PARAM_ACCESS))) | |
344 | #define params_format(p) ((__force snd_pcm_format_t)\ | |
345 | snd_mask_min(hw_param_mask_c((p), SNDRV_PCM_HW_PARAM_FORMAT))) | |
346 | #define params_subformat(p) \ | |
347 | snd_mask_min(hw_param_mask_c((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) | |
1da177e4 | 348 | |
b51beb75 TI |
349 | static inline unsigned int |
350 | params_period_bytes(const struct snd_pcm_hw_params *p) | |
351 | { | |
352 | return (params_period_size(p) * | |
353 | snd_pcm_format_physical_width(params_format(p)) * | |
354 | params_channels(p)) / 8; | |
355 | } | |
356 | ||
8c5178fc MB |
357 | static inline int |
358 | params_width(const struct snd_pcm_hw_params *p) | |
359 | { | |
360 | return snd_pcm_format_width(params_format(p)); | |
361 | } | |
362 | ||
363 | static inline int | |
364 | params_physical_width(const struct snd_pcm_hw_params *p) | |
365 | { | |
366 | return snd_pcm_format_physical_width(params_format(p)); | |
367 | } | |
368 | ||
b51beb75 | 369 | #endif /* __SOUND_PCM_PARAMS_H */ |