1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef __SOUND_PCM_PARAMS_H
3 #define __SOUND_PCM_PARAMS_H
10 #include <sound/pcm.h>
12 int 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);
15 int 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);
18 int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
19 snd_pcm_hw_param_t var, int *dir);
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))
26 static inline size_t snd_mask_sizeof(void)
28 return sizeof(struct snd_mask);
31 static inline void snd_mask_none(struct snd_mask *mask)
33 memset(mask, 0, sizeof(*mask));
36 static inline void snd_mask_any(struct snd_mask *mask)
38 memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
41 static inline int snd_mask_empty(const struct snd_mask *mask)
44 for (i = 0; i < SNDRV_MASK_SIZE; i++)
50 static inline unsigned int snd_mask_min(const struct snd_mask *mask)
53 for (i = 0; i < SNDRV_MASK_SIZE; i++) {
55 return __ffs(mask->bits[i]) + (i << 5);
60 static inline unsigned int snd_mask_max(const struct snd_mask *mask)
63 for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {
65 return __fls(mask->bits[i]) + (i << 5);
70 static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)
72 mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
75 /* Most of drivers need only this one */
76 static inline void snd_mask_set_format(struct snd_mask *mask,
77 snd_pcm_format_t format)
79 snd_mask_set(mask, (__force unsigned int)format);
82 static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)
84 mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
87 static inline void snd_mask_set_range(struct snd_mask *mask,
88 unsigned int from, unsigned int to)
91 for (i = from; i <= to; i++)
92 mask->bits[MASK_OFS(i)] |= MASK_BIT(i);
95 static inline void snd_mask_reset_range(struct snd_mask *mask,
96 unsigned int from, unsigned int to)
99 for (i = from; i <= to; i++)
100 mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
103 static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val)
106 v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
108 mask->bits[MASK_OFS(val)] = v;
111 static inline void snd_mask_intersect(struct snd_mask *mask,
112 const struct snd_mask *v)
115 for (i = 0; i < SNDRV_MASK_SIZE; i++)
116 mask->bits[i] &= v->bits[i];
119 static inline int snd_mask_eq(const struct snd_mask *mask,
120 const struct snd_mask *v)
122 return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
125 static inline void snd_mask_copy(struct snd_mask *mask,
126 const struct snd_mask *v)
131 static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val)
133 return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
136 static inline int snd_mask_single(const struct snd_mask *mask)
139 for (i = 0; i < SNDRV_MASK_SIZE; i++) {
142 if (mask->bits[i] & (mask->bits[i] - 1))
151 static inline int snd_mask_refine(struct snd_mask *mask,
152 const struct snd_mask *v)
155 snd_mask_copy(&old, mask);
156 snd_mask_intersect(mask, v);
157 if (snd_mask_empty(mask))
159 return !snd_mask_eq(mask, &old);
162 static inline int snd_mask_refine_first(struct snd_mask *mask)
164 if (snd_mask_single(mask))
166 snd_mask_leave(mask, snd_mask_min(mask));
170 static inline int snd_mask_refine_last(struct snd_mask *mask)
172 if (snd_mask_single(mask))
174 snd_mask_leave(mask, snd_mask_max(mask));
178 static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val)
180 if (snd_mask_min(mask) >= val)
182 snd_mask_reset_range(mask, 0, val - 1);
183 if (snd_mask_empty(mask))
188 static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val)
190 if (snd_mask_max(mask) <= val)
192 snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS);
193 if (snd_mask_empty(mask))
198 static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val)
201 changed = !snd_mask_single(mask);
202 snd_mask_leave(mask, val);
203 if (snd_mask_empty(mask))
208 static inline int snd_mask_value(const struct snd_mask *mask)
210 return snd_mask_min(mask);
213 static inline void snd_interval_any(struct snd_interval *i)
223 static inline void snd_interval_none(struct snd_interval *i)
228 static inline int snd_interval_checkempty(const struct snd_interval *i)
230 return (i->min > i->max ||
231 (i->min == i->max && (i->openmin || i->openmax)));
234 static inline int snd_interval_empty(const struct snd_interval *i)
239 static inline int snd_interval_single(const struct snd_interval *i)
241 return (i->min == i->max ||
242 (i->min + 1 == i->max && (i->openmin || i->openmax)));
245 static inline int snd_interval_value(const struct snd_interval *i)
247 if (i->openmin && !i->openmax)
252 static inline int snd_interval_min(const struct snd_interval *i)
257 static inline int snd_interval_max(const struct snd_interval *i)
266 static inline int snd_interval_test(const struct snd_interval *i, unsigned int val)
268 return !((i->min > val || (i->min == val && i->openmin) ||
269 i->max < val || (i->max == val && i->openmax)));
272 static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s)
277 static inline int snd_interval_setinteger(struct snd_interval *i)
281 if (i->openmin && i->openmax && i->min == i->max)
287 static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2)
293 return i1->min == i2->min && i1->openmin == i2->openmin &&
294 i1->max == i2->max && i1->openmax == i2->openmax;
298 * params_access - get the access type from the hw params
301 static inline snd_pcm_access_t params_access(const struct snd_pcm_hw_params *p)
303 return (__force snd_pcm_access_t)snd_mask_min(hw_param_mask_c(p,
304 SNDRV_PCM_HW_PARAM_ACCESS));
308 * params_format - get the sample format from the hw params
311 static inline snd_pcm_format_t params_format(const struct snd_pcm_hw_params *p)
313 return (__force snd_pcm_format_t)snd_mask_min(hw_param_mask_c(p,
314 SNDRV_PCM_HW_PARAM_FORMAT));
318 * params_subformat - get the sample subformat from the hw params
321 static inline snd_pcm_subformat_t
322 params_subformat(const struct snd_pcm_hw_params *p)
324 return (__force snd_pcm_subformat_t)snd_mask_min(hw_param_mask_c(p,
325 SNDRV_PCM_HW_PARAM_SUBFORMAT));
329 * params_period_bytes - get the period size (in bytes) from the hw params
332 static inline unsigned int
333 params_period_bytes(const struct snd_pcm_hw_params *p)
335 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_BYTES)->min;
339 * params_width - get the number of bits of the sample format from the hw params
342 * This function returns the number of bits per sample that the selected sample
343 * format of the hw params has.
345 static inline int params_width(const struct snd_pcm_hw_params *p)
347 return snd_pcm_format_width(params_format(p));
351 * params_physical_width - get the storage size of the sample format from the hw params
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
358 static inline int params_physical_width(const struct snd_pcm_hw_params *p)
360 return snd_pcm_format_physical_width(params_format(p));
364 params_set_format(struct snd_pcm_hw_params *p, snd_pcm_format_t fmt)
366 snd_mask_set_format(hw_param_mask(p, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
369 #endif /* __SOUND_PCM_PARAMS_H */