1
2#ifndef __SOUND_PCM_PARAMS_H
3#define __SOUND_PCM_PARAMS_H
4
5
6
7
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
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
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
299
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
309
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
319
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
330
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
340
341
342
343
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
352
353
354
355
356
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
370