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