1 #ifndef __SOUND_PCM_PARAMS_H
2 #define __SOUND_PCM_PARAMS_H
6 * Copyright (c) by Abramo Bagnara <abramo@alsa-project.org>
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.
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.
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
25 #include <sound/pcm.h>
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);
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))
41 static inline unsigned int ld2(u_int32_t v)
66 static inline size_t snd_mask_sizeof(void)
68 return sizeof(struct snd_mask);
71 static inline void snd_mask_none(struct snd_mask *mask)
73 memset(mask, 0, sizeof(*mask));
76 static inline void snd_mask_any(struct snd_mask *mask)
78 memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
81 static inline int snd_mask_empty(const struct snd_mask *mask)
84 for (i = 0; i < SNDRV_MASK_SIZE; i++)
90 static inline unsigned int snd_mask_min(const struct snd_mask *mask)
93 for (i = 0; i < SNDRV_MASK_SIZE; i++) {
95 return ffs(mask->bits[i]) - 1 + (i << 5);
100 static inline unsigned int snd_mask_max(const struct snd_mask *mask)
103 for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {
105 return ld2(mask->bits[i]) + (i << 5);
110 static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)
112 mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
115 static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)
117 mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
120 static inline void snd_mask_set_range(struct snd_mask *mask,
121 unsigned int from, unsigned int to)
124 for (i = from; i <= to; i++)
125 mask->bits[MASK_OFS(i)] |= MASK_BIT(i);
128 static inline void snd_mask_reset_range(struct snd_mask *mask,
129 unsigned int from, unsigned int to)
132 for (i = from; i <= to; i++)
133 mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
136 static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val)
139 v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
141 mask->bits[MASK_OFS(val)] = v;
144 static inline void snd_mask_intersect(struct snd_mask *mask,
145 const struct snd_mask *v)
148 for (i = 0; i < SNDRV_MASK_SIZE; i++)
149 mask->bits[i] &= v->bits[i];
152 static inline int snd_mask_eq(const struct snd_mask *mask,
153 const struct snd_mask *v)
155 return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
158 static inline void snd_mask_copy(struct snd_mask *mask,
159 const struct snd_mask *v)
164 static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val)
166 return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
169 static inline int snd_mask_single(const struct snd_mask *mask)
172 for (i = 0; i < SNDRV_MASK_SIZE; i++) {
175 if (mask->bits[i] & (mask->bits[i] - 1))
184 static inline int snd_mask_refine(struct snd_mask *mask,
185 const struct snd_mask *v)
188 snd_mask_copy(&old, mask);
189 snd_mask_intersect(mask, v);
190 if (snd_mask_empty(mask))
192 return !snd_mask_eq(mask, &old);
195 static inline int snd_mask_refine_first(struct snd_mask *mask)
197 if (snd_mask_single(mask))
199 snd_mask_leave(mask, snd_mask_min(mask));
203 static inline int snd_mask_refine_last(struct snd_mask *mask)
205 if (snd_mask_single(mask))
207 snd_mask_leave(mask, snd_mask_max(mask));
211 static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val)
213 if (snd_mask_min(mask) >= val)
215 snd_mask_reset_range(mask, 0, val - 1);
216 if (snd_mask_empty(mask))
221 static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val)
223 if (snd_mask_max(mask) <= val)
225 snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS);
226 if (snd_mask_empty(mask))
231 static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val)
234 changed = !snd_mask_single(mask);
235 snd_mask_leave(mask, val);
236 if (snd_mask_empty(mask))
241 static inline int snd_mask_value(const struct snd_mask *mask)
243 return snd_mask_min(mask);
246 static inline void snd_interval_any(struct snd_interval *i)
256 static inline void snd_interval_none(struct snd_interval *i)
261 static inline int snd_interval_checkempty(const struct snd_interval *i)
263 return (i->min > i->max ||
264 (i->min == i->max && (i->openmin || i->openmax)));
267 static inline int snd_interval_empty(const struct snd_interval *i)
272 static inline int snd_interval_single(const struct snd_interval *i)
274 return (i->min == i->max ||
275 (i->min + 1 == i->max && i->openmax));
278 static inline int snd_interval_value(const struct snd_interval *i)
283 static inline int snd_interval_min(const struct snd_interval *i)
288 static inline int snd_interval_max(const struct snd_interval *i)
297 static inline int snd_interval_test(const struct snd_interval *i, unsigned int val)
299 return !((i->min > val || (i->min == val && i->openmin) ||
300 i->max < val || (i->max == val && i->openmax)));
303 static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s)
308 static inline int snd_interval_setinteger(struct snd_interval *i)
312 if (i->openmin && i->openmax && i->min == i->max)
318 static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2)
324 return i1->min == i2->min && i1->openmin == i2->openmin &&
325 i1->max == i2->max && i1->openmax == i2->openmax;
328 static inline unsigned int add(unsigned int a, unsigned int b)
330 if (a >= UINT_MAX - b)
335 static inline unsigned int sub(unsigned int a, unsigned int b)
342 #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))
349 static inline unsigned int
350 params_period_bytes(const struct snd_pcm_hw_params *p)
352 return (params_period_size(p) *
353 snd_pcm_format_physical_width(params_format(p)) *
354 params_channels(p)) / 8;
357 #endif /* __SOUND_PCM_PARAMS_H */