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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 | |
25 | #include <sound/pcm.h> |
26 | |
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); |
35 | |
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 | |
41 | static inline unsigned int ld2(u_int32_t v) |
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 | |
66 | static inline size_t snd_mask_sizeof(void) |
67 | { |
68 | return sizeof(struct snd_mask); |
69 | } |
70 | |
71 | static inline void snd_mask_none(struct snd_mask *mask) |
72 | { |
73 | memset(mask, 0, sizeof(*mask)); |
74 | } |
75 | |
76 | static inline void snd_mask_any(struct snd_mask *mask) |
77 | { |
78 | memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t)); |
79 | } |
80 | |
81 | static inline int snd_mask_empty(const struct snd_mask *mask) |
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 | |
90 | static inline unsigned int snd_mask_min(const struct snd_mask *mask) |
91 | { |
92 | int i; |
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 | |
100 | static inline unsigned int snd_mask_max(const struct snd_mask *mask) |
101 | { |
102 | int i; |
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 | |
110 | static inline void snd_mask_set(struct snd_mask *mask, unsigned int val) |
111 | { |
112 | mask->bits[MASK_OFS(val)] |= MASK_BIT(val); |
113 | } |
114 | |
115 | static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val) |
116 | { |
117 | mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val); |
118 | } |
119 | |
120 | static inline void snd_mask_set_range(struct snd_mask *mask, |
121 | unsigned int from, unsigned int to) |
122 | { |
123 | unsigned int i; |
124 | for (i = from; i <= to; i++) |
125 | mask->bits[MASK_OFS(i)] |= MASK_BIT(i); |
126 | } |
127 | |
128 | static inline void snd_mask_reset_range(struct snd_mask *mask, |
129 | unsigned int from, unsigned int to) |
130 | { |
131 | unsigned int i; |
132 | for (i = from; i <= to; i++) |
133 | mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i); |
134 | } |
135 | |
136 | static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val) |
137 | { |
138 | unsigned int v; |
139 | v = mask->bits[MASK_OFS(val)] & MASK_BIT(val); |
140 | snd_mask_none(mask); |
141 | mask->bits[MASK_OFS(val)] = v; |
142 | } |
143 | |
144 | static inline void snd_mask_intersect(struct snd_mask *mask, |
145 | const struct snd_mask *v) |
146 | { |
147 | int i; |
148 | for (i = 0; i < SNDRV_MASK_SIZE; i++) |
149 | mask->bits[i] &= v->bits[i]; |
150 | } |
151 | |
152 | static inline int snd_mask_eq(const struct snd_mask *mask, |
153 | const struct snd_mask *v) |
154 | { |
155 | return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t)); |
156 | } |
157 | |
158 | static inline void snd_mask_copy(struct snd_mask *mask, |
159 | const struct snd_mask *v) |
160 | { |
161 | *mask = *v; |
162 | } |
163 | |
164 | static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val) |
165 | { |
166 | return mask->bits[MASK_OFS(val)] & MASK_BIT(val); |
167 | } |
168 | |
169 | static inline int snd_mask_single(const struct snd_mask *mask) |
170 | { |
171 | int i, c = 0; |
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 | |
184 | static inline int snd_mask_refine(struct snd_mask *mask, |
185 | const struct snd_mask *v) |
186 | { |
187 | struct snd_mask old; |
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 | |
195 | static inline int snd_mask_refine_first(struct snd_mask *mask) |
196 | { |
197 | if (snd_mask_single(mask)) |
198 | return 0; |
199 | snd_mask_leave(mask, snd_mask_min(mask)); |
200 | return 1; |
201 | } |
202 | |
203 | static inline int snd_mask_refine_last(struct snd_mask *mask) |
204 | { |
205 | if (snd_mask_single(mask)) |
206 | return 0; |
207 | snd_mask_leave(mask, snd_mask_max(mask)); |
208 | return 1; |
209 | } |
210 | |
211 | static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val) |
212 | { |
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 | |
221 | static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val) |
222 | { |
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 | |
231 | static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val) |
232 | { |
233 | int changed; |
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 | |
241 | static inline int snd_mask_value(const struct snd_mask *mask) |
242 | { |
243 | return snd_mask_min(mask); |
244 | } |
245 | |
246 | static inline void snd_interval_any(struct snd_interval *i) |
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 | |
256 | static inline void snd_interval_none(struct snd_interval *i) |
257 | { |
258 | i->empty = 1; |
259 | } |
260 | |
261 | static inline int snd_interval_checkempty(const struct snd_interval *i) |
262 | { |
263 | return (i->min > i->max || |
264 | (i->min == i->max && (i->openmin || i->openmax))); |
265 | } |
266 | |
267 | static inline int snd_interval_empty(const struct snd_interval *i) |
268 | { |
269 | return i->empty; |
270 | } |
271 | |
272 | static inline int snd_interval_single(const struct snd_interval *i) |
273 | { |
274 | return (i->min == i->max || |
275 | (i->min + 1 == i->max && i->openmax)); |
276 | } |
277 | |
278 | static inline int snd_interval_value(const struct snd_interval *i) |
279 | { |
280 | return i->min; |
281 | } |
282 | |
283 | static inline int snd_interval_min(const struct snd_interval *i) |
284 | { |
285 | return i->min; |
286 | } |
287 | |
288 | static inline int snd_interval_max(const struct snd_interval *i) |
289 | { |
290 | unsigned int v; |
291 | v = i->max; |
292 | if (i->openmax) |
293 | v--; |
294 | return v; |
295 | } |
296 | |
297 | static inline int snd_interval_test(const struct snd_interval *i, unsigned int val) |
298 | { |
299 | return !((i->min > val || (i->min == val && i->openmin) || |
300 | i->max < val || (i->max == val && i->openmax))); |
301 | } |
302 | |
303 | static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s) |
304 | { |
305 | *d = *s; |
306 | } |
307 | |
308 | static inline int snd_interval_setinteger(struct snd_interval *i) |
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 | |
318 | static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2) |
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 | |
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)) |
348 | |
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 | |
357 | #endif /* __SOUND_PCM_PARAMS_H */ |
358 |
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