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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
25int 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);
33
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
39static inline unsigned int ld2(u_int32_t v)
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
64static inline size_t snd_mask_sizeof(void)
65{
66 return sizeof(struct snd_mask);
67}
68
69static inline void snd_mask_none(struct snd_mask *mask)
70{
71 memset(mask, 0, sizeof(*mask));
72}
73
74static inline void snd_mask_any(struct snd_mask *mask)
75{
76 memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
77}
78
79static inline int snd_mask_empty(const struct snd_mask *mask)
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
88static inline unsigned int snd_mask_min(const struct snd_mask *mask)
89{
90 int i;
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
98static inline unsigned int snd_mask_max(const struct snd_mask *mask)
99{
100 int i;
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
108static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)
109{
110 mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
111}
112
113static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)
114{
115 mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
116}
117
118static inline void snd_mask_set_range(struct snd_mask *mask,
119 unsigned int from, unsigned int to)
120{
121 unsigned int i;
122 for (i = from; i <= to; i++)
123 mask->bits[MASK_OFS(i)] |= MASK_BIT(i);
124}
125
126static inline void snd_mask_reset_range(struct snd_mask *mask,
127 unsigned int from, unsigned int to)
128{
129 unsigned int i;
130 for (i = from; i <= to; i++)
131 mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
132}
133
134static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val)
135{
136 unsigned int v;
137 v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
138 snd_mask_none(mask);
139 mask->bits[MASK_OFS(val)] = v;
140}
141
142static inline void snd_mask_intersect(struct snd_mask *mask,
143 const struct snd_mask *v)
144{
145 int i;
146 for (i = 0; i < SNDRV_MASK_SIZE; i++)
147 mask->bits[i] &= v->bits[i];
148}
149
150static inline int snd_mask_eq(const struct snd_mask *mask,
151 const struct snd_mask *v)
152{
153 return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
154}
155
156static inline void snd_mask_copy(struct snd_mask *mask,
157 const struct snd_mask *v)
158{
159 *mask = *v;
160}
161
162static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val)
163{
164 return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
165}
166
167static inline int snd_mask_single(const struct snd_mask *mask)
168{
169 int i, c = 0;
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
182static inline int snd_mask_refine(struct snd_mask *mask,
183 const struct snd_mask *v)
184{
185 struct snd_mask old;
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
193static inline int snd_mask_refine_first(struct snd_mask *mask)
194{
195 if (snd_mask_single(mask))
196 return 0;
197 snd_mask_leave(mask, snd_mask_min(mask));
198 return 1;
199}
200
201static inline int snd_mask_refine_last(struct snd_mask *mask)
202{
203 if (snd_mask_single(mask))
204 return 0;
205 snd_mask_leave(mask, snd_mask_max(mask));
206 return 1;
207}
208
209static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val)
210{
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
219static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val)
220{
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
229static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val)
230{
231 int changed;
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
239static inline int snd_mask_value(const struct snd_mask *mask)
240{
241 return snd_mask_min(mask);
242}
243
244static inline void snd_interval_any(struct snd_interval *i)
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
254static inline void snd_interval_none(struct snd_interval *i)
255{
256 i->empty = 1;
257}
258
259static inline int snd_interval_checkempty(const struct snd_interval *i)
260{
261 return (i->min > i->max ||
262 (i->min == i->max && (i->openmin || i->openmax)));
263}
264
265static inline int snd_interval_empty(const struct snd_interval *i)
266{
267 return i->empty;
268}
269
270static inline int snd_interval_single(const struct snd_interval *i)
271{
272 return (i->min == i->max ||
273 (i->min + 1 == i->max && i->openmax));
274}
275
276static inline int snd_interval_value(const struct snd_interval *i)
277{
278 return i->min;
279}
280
281static inline int snd_interval_min(const struct snd_interval *i)
282{
283 return i->min;
284}
285
286static inline int snd_interval_max(const struct snd_interval *i)
287{
288 unsigned int v;
289 v = i->max;
290 if (i->openmax)
291 v--;
292 return v;
293}
294
295static inline int snd_interval_test(const struct snd_interval *i, unsigned int val)
296{
297 return !((i->min > val || (i->min == val && i->openmin) ||
298 i->max < val || (i->max == val && i->openmax)));
299}
300
301static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s)
302{
303 *d = *s;
304}
305
306static inline int snd_interval_setinteger(struct snd_interval *i)
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
316static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2)
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
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
340#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))
346
347static 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 */
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef __SOUND_PCM_PARAMS_H
3#define __SOUND_PCM_PARAMS_H
4
5/*
6 * PCM params helpers
7 * Copyright (c) by Abramo Bagnara <abramo@alsa-project.org>
8 */
9
10#include <sound/pcm.h>
11
12int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm,
13 struct snd_pcm_hw_params *params,
14 snd_pcm_hw_param_t var, int *dir);
15int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm,
16 struct snd_pcm_hw_params *params,
17 snd_pcm_hw_param_t var, int *dir);
18int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
19 snd_pcm_hw_param_t var, int *dir);
20
21#define SNDRV_MASK_BITS 64 /* we use so far 64bits only */
22#define SNDRV_MASK_SIZE (SNDRV_MASK_BITS / 32)
23#define MASK_OFS(i) ((i) >> 5)
24#define MASK_BIT(i) (1U << ((i) & 31))
25
26static inline size_t snd_mask_sizeof(void)
27{
28 return sizeof(struct snd_mask);
29}
30
31static inline void snd_mask_none(struct snd_mask *mask)
32{
33 memset(mask, 0, sizeof(*mask));
34}
35
36static inline void snd_mask_any(struct snd_mask *mask)
37{
38 memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
39}
40
41static inline int snd_mask_empty(const struct snd_mask *mask)
42{
43 int i;
44 for (i = 0; i < SNDRV_MASK_SIZE; i++)
45 if (mask->bits[i])
46 return 0;
47 return 1;
48}
49
50static inline unsigned int snd_mask_min(const struct snd_mask *mask)
51{
52 int i;
53 for (i = 0; i < SNDRV_MASK_SIZE; i++) {
54 if (mask->bits[i])
55 return __ffs(mask->bits[i]) + (i << 5);
56 }
57 return 0;
58}
59
60static inline unsigned int snd_mask_max(const struct snd_mask *mask)
61{
62 int i;
63 for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {
64 if (mask->bits[i])
65 return __fls(mask->bits[i]) + (i << 5);
66 }
67 return 0;
68}
69
70static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)
71{
72 mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
73}
74
75/* Most of drivers need only this one */
76static inline void snd_mask_set_format(struct snd_mask *mask,
77 snd_pcm_format_t format)
78{
79 snd_mask_set(mask, (__force unsigned int)format);
80}
81
82static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)
83{
84 mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
85}
86
87static inline void snd_mask_set_range(struct snd_mask *mask,
88 unsigned int from, unsigned int to)
89{
90 unsigned int i;
91 for (i = from; i <= to; i++)
92 mask->bits[MASK_OFS(i)] |= MASK_BIT(i);
93}
94
95static inline void snd_mask_reset_range(struct snd_mask *mask,
96 unsigned int from, unsigned int to)
97{
98 unsigned int i;
99 for (i = from; i <= to; i++)
100 mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
101}
102
103static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val)
104{
105 unsigned int v;
106 v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
107 snd_mask_none(mask);
108 mask->bits[MASK_OFS(val)] = v;
109}
110
111static inline void snd_mask_intersect(struct snd_mask *mask,
112 const struct snd_mask *v)
113{
114 int i;
115 for (i = 0; i < SNDRV_MASK_SIZE; i++)
116 mask->bits[i] &= v->bits[i];
117}
118
119static inline int snd_mask_eq(const struct snd_mask *mask,
120 const struct snd_mask *v)
121{
122 return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
123}
124
125static inline void snd_mask_copy(struct snd_mask *mask,
126 const struct snd_mask *v)
127{
128 *mask = *v;
129}
130
131static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val)
132{
133 return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
134}
135
136/* Most of drivers need only this one */
137static inline int snd_mask_test_format(const struct snd_mask *mask,
138 snd_pcm_format_t format)
139{
140 return snd_mask_test(mask, (__force unsigned int)format);
141}
142
143static inline int snd_mask_single(const struct snd_mask *mask)
144{
145 int i, c = 0;
146 for (i = 0; i < SNDRV_MASK_SIZE; i++) {
147 if (! mask->bits[i])
148 continue;
149 if (mask->bits[i] & (mask->bits[i] - 1))
150 return 0;
151 if (c)
152 return 0;
153 c++;
154 }
155 return 1;
156}
157
158static inline int snd_mask_refine(struct snd_mask *mask,
159 const struct snd_mask *v)
160{
161 struct snd_mask old;
162 snd_mask_copy(&old, mask);
163 snd_mask_intersect(mask, v);
164 if (snd_mask_empty(mask))
165 return -EINVAL;
166 return !snd_mask_eq(mask, &old);
167}
168
169static inline int snd_mask_refine_first(struct snd_mask *mask)
170{
171 if (snd_mask_single(mask))
172 return 0;
173 snd_mask_leave(mask, snd_mask_min(mask));
174 return 1;
175}
176
177static inline int snd_mask_refine_last(struct snd_mask *mask)
178{
179 if (snd_mask_single(mask))
180 return 0;
181 snd_mask_leave(mask, snd_mask_max(mask));
182 return 1;
183}
184
185static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val)
186{
187 if (snd_mask_min(mask) >= val)
188 return 0;
189 snd_mask_reset_range(mask, 0, val - 1);
190 if (snd_mask_empty(mask))
191 return -EINVAL;
192 return 1;
193}
194
195static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val)
196{
197 if (snd_mask_max(mask) <= val)
198 return 0;
199 snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS);
200 if (snd_mask_empty(mask))
201 return -EINVAL;
202 return 1;
203}
204
205static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val)
206{
207 int changed;
208 changed = !snd_mask_single(mask);
209 snd_mask_leave(mask, val);
210 if (snd_mask_empty(mask))
211 return -EINVAL;
212 return changed;
213}
214
215static inline int snd_mask_value(const struct snd_mask *mask)
216{
217 return snd_mask_min(mask);
218}
219
220static inline void snd_interval_any(struct snd_interval *i)
221{
222 i->min = 0;
223 i->openmin = 0;
224 i->max = UINT_MAX;
225 i->openmax = 0;
226 i->integer = 0;
227 i->empty = 0;
228}
229
230static inline void snd_interval_none(struct snd_interval *i)
231{
232 i->empty = 1;
233}
234
235static inline int snd_interval_checkempty(const struct snd_interval *i)
236{
237 return (i->min > i->max ||
238 (i->min == i->max && (i->openmin || i->openmax)));
239}
240
241static inline int snd_interval_empty(const struct snd_interval *i)
242{
243 return i->empty;
244}
245
246static inline int snd_interval_single(const struct snd_interval *i)
247{
248 return (i->min == i->max ||
249 (i->min + 1 == i->max && (i->openmin || i->openmax)));
250}
251
252static inline int snd_interval_value(const struct snd_interval *i)
253{
254 if (i->openmin && !i->openmax)
255 return i->max;
256 return i->min;
257}
258
259static inline int snd_interval_min(const struct snd_interval *i)
260{
261 return i->min;
262}
263
264static inline int snd_interval_max(const struct snd_interval *i)
265{
266 unsigned int v;
267 v = i->max;
268 if (i->openmax)
269 v--;
270 return v;
271}
272
273static inline int snd_interval_test(const struct snd_interval *i, unsigned int val)
274{
275 return !((i->min > val || (i->min == val && i->openmin) ||
276 i->max < val || (i->max == val && i->openmax)));
277}
278
279static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s)
280{
281 *d = *s;
282}
283
284static inline int snd_interval_setinteger(struct snd_interval *i)
285{
286 if (i->integer)
287 return 0;
288 if (i->openmin && i->openmax && i->min == i->max)
289 return -EINVAL;
290 i->integer = 1;
291 return 1;
292}
293
294static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2)
295{
296 if (i1->empty)
297 return i2->empty;
298 if (i2->empty)
299 return i1->empty;
300 return i1->min == i2->min && i1->openmin == i2->openmin &&
301 i1->max == i2->max && i1->openmax == i2->openmax;
302}
303
304/**
305 * params_access - get the access type from the hw params
306 * @p: hw params
307 */
308static inline snd_pcm_access_t params_access(const struct snd_pcm_hw_params *p)
309{
310 return (__force snd_pcm_access_t)snd_mask_min(hw_param_mask_c(p,
311 SNDRV_PCM_HW_PARAM_ACCESS));
312}
313
314/**
315 * params_format - get the sample format from the hw params
316 * @p: hw params
317 */
318static inline snd_pcm_format_t params_format(const struct snd_pcm_hw_params *p)
319{
320 return (__force snd_pcm_format_t)snd_mask_min(hw_param_mask_c(p,
321 SNDRV_PCM_HW_PARAM_FORMAT));
322}
323
324/**
325 * params_subformat - get the sample subformat from the hw params
326 * @p: hw params
327 */
328static inline snd_pcm_subformat_t
329params_subformat(const struct snd_pcm_hw_params *p)
330{
331 return (__force snd_pcm_subformat_t)snd_mask_min(hw_param_mask_c(p,
332 SNDRV_PCM_HW_PARAM_SUBFORMAT));
333}
334
335/**
336 * params_period_bytes - get the period size (in bytes) from the hw params
337 * @p: hw params
338 */
339static inline unsigned int
340params_period_bytes(const struct snd_pcm_hw_params *p)
341{
342 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_BYTES)->min;
343}
344
345/**
346 * params_width - get the number of bits of the sample format from the hw params
347 * @p: hw params
348 *
349 * This function returns the number of bits per sample that the selected sample
350 * format of the hw params has.
351 */
352static inline int params_width(const struct snd_pcm_hw_params *p)
353{
354 return snd_pcm_format_width(params_format(p));
355}
356
357/*
358 * params_physical_width - get the storage size of the sample format from the hw params
359 * @p: hw params
360 *
361 * This functions returns the number of bits per sample that the selected sample
362 * format of the hw params takes up in memory. This will be equal or larger than
363 * params_width().
364 */
365static inline int params_physical_width(const struct snd_pcm_hw_params *p)
366{
367 return snd_pcm_format_physical_width(params_format(p));
368}
369
370static inline void
371params_set_format(struct snd_pcm_hw_params *p, snd_pcm_format_t fmt)
372{
373 snd_mask_set_format(hw_param_mask(p, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
374}
375
376#endif /* __SOUND_PCM_PARAMS_H */