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