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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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
Takashi Iwaie88e8ae62006-04-28 15:13:40 +020025int 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);
28int 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);
31int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
32 snd_pcm_hw_param_t var, int *dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#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
Takashi Iwai9bb22e22006-04-28 15:13:39 +020039static inline unsigned int ld2(u_int32_t v)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040{
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
Takashi Iwai9bb22e22006-04-28 15:13:39 +020064static inline size_t snd_mask_sizeof(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
Takashi Iwai877211f2005-11-17 13:59:38 +010066 return sizeof(struct snd_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067}
68
Takashi Iwai9bb22e22006-04-28 15:13:39 +020069static inline void snd_mask_none(struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
71 memset(mask, 0, sizeof(*mask));
72}
73
Takashi Iwai9bb22e22006-04-28 15:13:39 +020074static inline void snd_mask_any(struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070075{
76 memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
77}
78
Takashi Iwai9bb22e22006-04-28 15:13:39 +020079static inline int snd_mask_empty(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
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
Takashi Iwai9bb22e22006-04-28 15:13:39 +020088static inline unsigned int snd_mask_min(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070089{
90 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +020098static inline unsigned int snd_mask_max(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099{
100 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200108static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
111}
112
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200113static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
116}
117
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200118static inline void snd_mask_set_range(struct snd_mask *mask,
119 unsigned int from, unsigned int to)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120{
121 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 for (i = from; i <= to; i++)
123 mask->bits[MASK_OFS(i)] |= MASK_BIT(i);
124}
125
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200126static inline void snd_mask_reset_range(struct snd_mask *mask,
127 unsigned int from, unsigned int to)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128{
129 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 for (i = from; i <= to; i++)
131 mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
132}
133
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200134static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135{
136 unsigned int v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
138 snd_mask_none(mask);
139 mask->bits[MASK_OFS(val)] = v;
140}
141
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200142static inline void snd_mask_intersect(struct snd_mask *mask,
143 const struct snd_mask *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144{
145 int i;
146 for (i = 0; i < SNDRV_MASK_SIZE; i++)
147 mask->bits[i] &= v->bits[i];
148}
149
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200150static inline int snd_mask_eq(const struct snd_mask *mask,
151 const struct snd_mask *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152{
153 return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
154}
155
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200156static inline void snd_mask_copy(struct snd_mask *mask,
157 const struct snd_mask *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158{
159 *mask = *v;
160}
161
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200162static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
165}
166
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200167static inline int snd_mask_single(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168{
169 int i, c = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200182static inline int snd_mask_refine(struct snd_mask *mask,
183 const struct snd_mask *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{
Takashi Iwai877211f2005-11-17 13:59:38 +0100185 struct snd_mask old;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200193static inline int snd_mask_refine_first(struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 if (snd_mask_single(mask))
196 return 0;
197 snd_mask_leave(mask, snd_mask_min(mask));
198 return 1;
199}
200
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200201static inline int snd_mask_refine_last(struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 if (snd_mask_single(mask))
204 return 0;
205 snd_mask_leave(mask, snd_mask_max(mask));
206 return 1;
207}
208
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200209static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200219static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200229static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
231 int changed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200239static inline int snd_mask_value(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 return snd_mask_min(mask);
242}
243
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200244static inline void snd_interval_any(struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245{
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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200254static inline void snd_interval_none(struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255{
256 i->empty = 1;
257}
258
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200259static inline int snd_interval_checkempty(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260{
261 return (i->min > i->max ||
262 (i->min == i->max && (i->openmin || i->openmax)));
263}
264
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200265static inline int snd_interval_empty(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266{
267 return i->empty;
268}
269
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200270static inline int snd_interval_single(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 return (i->min == i->max ||
273 (i->min + 1 == i->max && i->openmax));
274}
275
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200276static inline int snd_interval_value(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 return i->min;
279}
280
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200281static inline int snd_interval_min(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 return i->min;
284}
285
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200286static inline int snd_interval_max(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287{
288 unsigned int v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 v = i->max;
290 if (i->openmax)
291 v--;
292 return v;
293}
294
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200295static inline int snd_interval_test(const struct snd_interval *i, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296{
297 return !((i->min > val || (i->min == val && i->openmin) ||
298 i->max < val || (i->max == val && i->openmax)));
299}
300
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200301static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302{
303 *d = *s;
304}
305
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200306static inline int snd_interval_setinteger(struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307{
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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200316static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
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
326static 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
333static inline unsigned int sub(unsigned int a, unsigned int b)
334{
335 if (a > b)
336 return a - b;
337 return 0;
338}
339
Takashi Iwaib51beb72011-07-26 12:02:56 +0200340#define params_access(p) ((__force snd_pcm_access_t)\
341 snd_mask_min(hw_param_mask_c((p), SNDRV_PCM_HW_PARAM_ACCESS)))
342#define params_format(p) ((__force snd_pcm_format_t)\
343 snd_mask_min(hw_param_mask_c((p), SNDRV_PCM_HW_PARAM_FORMAT)))
344#define params_subformat(p) \
345 snd_mask_min(hw_param_mask_c((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Takashi Iwaib51beb72011-07-26 12:02:56 +0200347static inline unsigned int
348params_period_bytes(const struct snd_pcm_hw_params *p)
349{
350 return (params_period_size(p) *
351 snd_pcm_format_physical_width(params_format(p)) *
352 params_channels(p)) / 8;
353}
354
355#endif /* __SOUND_PCM_PARAMS_H */