~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/sound/pcm_params.h

Version: ~ [ linux-5.8 ] ~ [ linux-5.7.14 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.57 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.138 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.193 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.232 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.232 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 
 27 int 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);
 30 int 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);
 33 int 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 
 41 static inline size_t snd_mask_sizeof(void)
 42 {
 43         return sizeof(struct snd_mask);
 44 }
 45 
 46 static inline void snd_mask_none(struct snd_mask *mask)
 47 {
 48         memset(mask, 0, sizeof(*mask));
 49 }
 50 
 51 static inline void snd_mask_any(struct snd_mask *mask)
 52 {
 53         memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
 54 }
 55 
 56 static 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 
 65 static 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 
 75 static 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 
 85 static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)
 86 {
 87         mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
 88 }
 89 
 90 static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)
 91 {
 92         mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
 93 }
 94 
 95 static 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 
103 static 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 
111 static 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 
119 static 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 
127 static 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 
133 static inline void snd_mask_copy(struct snd_mask *mask,
134                                  const struct snd_mask *v)
135 {
136         *mask = *v;
137 }
138 
139 static 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 
144 static 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 
159 static 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 
170 static 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 
178 static 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 
186 static 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 
196 static 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 
206 static 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 
216 static inline int snd_mask_value(const struct snd_mask *mask)
217 {
218         return snd_mask_min(mask);
219 }
220 
221 static 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 
231 static inline void snd_interval_none(struct snd_interval *i)
232 {
233         i->empty = 1;
234 }
235 
236 static 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 
242 static inline int snd_interval_empty(const struct snd_interval *i)
243 {
244         return i->empty;
245 }
246 
247 static 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 
253 static inline int snd_interval_value(const struct snd_interval *i)
254 {
255         return i->min;
256 }
257 
258 static inline int snd_interval_min(const struct snd_interval *i)
259 {
260         return i->min;
261 }
262 
263 static 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 
272 static 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 
278 static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s)
279 {
280         *d = *s;
281 }
282 
283 static 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 
293 static 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  */
307 static 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  */
317 static 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  */
327 static inline snd_pcm_subformat_t
328 params_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  */
338 static inline unsigned int
339 params_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  */
351 static 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  */
364 static 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 
369 static inline void
370 params_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 */
377 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp