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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
Mark Brownf3761c32012-06-19 19:31:48 +010025#include <sound/pcm.h>
26
Takashi Iwaie88e8ae62006-04-28 15:13:40 +020027int 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);
30int 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);
33int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
34 snd_pcm_hw_param_t var, int *dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#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
Takashi Iwai9bb22e22006-04-28 15:13:39 +020041static inline unsigned int ld2(u_int32_t v)
Linus Torvalds1da177e2005-04-16 15:20:36 -070042{
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
Takashi Iwai9bb22e22006-04-28 15:13:39 +020066static inline size_t snd_mask_sizeof(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070067{
Takashi Iwai877211f2005-11-17 13:59:38 +010068 return sizeof(struct snd_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069}
70
Takashi Iwai9bb22e22006-04-28 15:13:39 +020071static inline void snd_mask_none(struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
73 memset(mask, 0, sizeof(*mask));
74}
75
Takashi Iwai9bb22e22006-04-28 15:13:39 +020076static inline void snd_mask_any(struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077{
78 memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
79}
80
Takashi Iwai9bb22e22006-04-28 15:13:39 +020081static inline int snd_mask_empty(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070082{
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
Takashi Iwai9bb22e22006-04-28 15:13:39 +020090static inline unsigned int snd_mask_min(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070091{
92 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200100static inline unsigned int snd_mask_max(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101{
102 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200110static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
113}
114
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200115static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
118}
119
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200120static inline void snd_mask_set_range(struct snd_mask *mask,
121 unsigned int from, unsigned int to)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
123 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 for (i = from; i <= to; i++)
125 mask->bits[MASK_OFS(i)] |= MASK_BIT(i);
126}
127
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200128static inline void snd_mask_reset_range(struct snd_mask *mask,
129 unsigned int from, unsigned int to)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{
131 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 for (i = from; i <= to; i++)
133 mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
134}
135
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200136static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137{
138 unsigned int v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
140 snd_mask_none(mask);
141 mask->bits[MASK_OFS(val)] = v;
142}
143
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200144static inline void snd_mask_intersect(struct snd_mask *mask,
145 const struct snd_mask *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
147 int i;
148 for (i = 0; i < SNDRV_MASK_SIZE; i++)
149 mask->bits[i] &= v->bits[i];
150}
151
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200152static inline int snd_mask_eq(const struct snd_mask *mask,
153 const struct snd_mask *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
155 return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
156}
157
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200158static inline void snd_mask_copy(struct snd_mask *mask,
159 const struct snd_mask *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160{
161 *mask = *v;
162}
163
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200164static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
167}
168
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200169static inline int snd_mask_single(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170{
171 int i, c = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200184static inline int snd_mask_refine(struct snd_mask *mask,
185 const struct snd_mask *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
Takashi Iwai877211f2005-11-17 13:59:38 +0100187 struct snd_mask old;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200195static inline int snd_mask_refine_first(struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 if (snd_mask_single(mask))
198 return 0;
199 snd_mask_leave(mask, snd_mask_min(mask));
200 return 1;
201}
202
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200203static inline int snd_mask_refine_last(struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 if (snd_mask_single(mask))
206 return 0;
207 snd_mask_leave(mask, snd_mask_max(mask));
208 return 1;
209}
210
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200211static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200221static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200231static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
233 int changed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200241static inline int snd_mask_value(const struct snd_mask *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 return snd_mask_min(mask);
244}
245
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200246static inline void snd_interval_any(struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247{
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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200256static inline void snd_interval_none(struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257{
258 i->empty = 1;
259}
260
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200261static inline int snd_interval_checkempty(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{
263 return (i->min > i->max ||
264 (i->min == i->max && (i->openmin || i->openmax)));
265}
266
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200267static inline int snd_interval_empty(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268{
269 return i->empty;
270}
271
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200272static inline int snd_interval_single(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 return (i->min == i->max ||
275 (i->min + 1 == i->max && i->openmax));
276}
277
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200278static inline int snd_interval_value(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 return i->min;
281}
282
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200283static inline int snd_interval_min(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 return i->min;
286}
287
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200288static inline int snd_interval_max(const struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
290 unsigned int v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 v = i->max;
292 if (i->openmax)
293 v--;
294 return v;
295}
296
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200297static inline int snd_interval_test(const struct snd_interval *i, unsigned int val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298{
299 return !((i->min > val || (i->min == val && i->openmin) ||
300 i->max < val || (i->max == val && i->openmax)));
301}
302
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200303static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304{
305 *d = *s;
306}
307
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200308static inline int snd_interval_setinteger(struct snd_interval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
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
Takashi Iwai9bb22e22006-04-28 15:13:39 +0200318static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319{
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
328static 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
335static inline unsigned int sub(unsigned int a, unsigned int b)
336{
337 if (a > b)
338 return a - b;
339 return 0;
340}
341
Takashi Iwaib51beb72011-07-26 12:02:56 +0200342#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))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Takashi Iwaib51beb72011-07-26 12:02:56 +0200349static inline unsigned int
350params_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 */