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1/* SPDX-License-Identifier: GPL-2.0-or-later */2#ifndef __SOUND_PCM_PARAMS_H3#define __SOUND_PCM_PARAMS_H4 5/*6 * PCM params helpers7 * 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 void snd_mask_none(struct snd_mask *mask)27{28 memset(mask, 0, sizeof(*mask));29}30 31static inline void snd_mask_any(struct snd_mask *mask)32{33 memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));34}35 36static inline int snd_mask_empty(const struct snd_mask *mask)37{38 int i;39 for (i = 0; i < SNDRV_MASK_SIZE; i++)40 if (mask->bits[i])41 return 0;42 return 1;43}44 45static inline unsigned int snd_mask_min(const struct snd_mask *mask)46{47 int i;48 for (i = 0; i < SNDRV_MASK_SIZE; i++) {49 if (mask->bits[i])50 return __ffs(mask->bits[i]) + (i << 5);51 }52 return 0;53}54 55static inline unsigned int snd_mask_max(const struct snd_mask *mask)56{57 int i;58 for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {59 if (mask->bits[i])60 return __fls(mask->bits[i]) + (i << 5);61 }62 return 0;63}64 65static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)66{67 mask->bits[MASK_OFS(val)] |= MASK_BIT(val);68}69 70/* Most of drivers need only this one */71static inline void snd_mask_set_format(struct snd_mask *mask,72 snd_pcm_format_t format)73{74 snd_mask_set(mask, (__force unsigned int)format);75}76 77static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)78{79 mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);80}81 82static inline void snd_mask_set_range(struct snd_mask *mask,83 unsigned int from, unsigned int to)84{85 unsigned int i;86 for (i = from; i <= to; i++)87 mask->bits[MASK_OFS(i)] |= MASK_BIT(i);88}89 90static inline void snd_mask_reset_range(struct snd_mask *mask,91 unsigned int from, unsigned int to)92{93 unsigned int i;94 for (i = from; i <= to; i++)95 mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);96}97 98static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val)99{100 unsigned int v;101 v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);102 snd_mask_none(mask);103 mask->bits[MASK_OFS(val)] = v;104}105 106static inline void snd_mask_intersect(struct snd_mask *mask,107 const struct snd_mask *v)108{109 int i;110 for (i = 0; i < SNDRV_MASK_SIZE; i++)111 mask->bits[i] &= v->bits[i];112}113 114static inline int snd_mask_eq(const struct snd_mask *mask,115 const struct snd_mask *v)116{117 return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));118}119 120static inline void snd_mask_copy(struct snd_mask *mask,121 const struct snd_mask *v)122{123 *mask = *v;124}125 126static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val)127{128 return mask->bits[MASK_OFS(val)] & MASK_BIT(val);129}130 131/* Most of drivers need only this one */132static inline int snd_mask_test_format(const struct snd_mask *mask,133 snd_pcm_format_t format)134{135 return snd_mask_test(mask, (__force unsigned int)format);136}137 138static inline int snd_mask_single(const struct snd_mask *mask)139{140 int i, c = 0;141 for (i = 0; i < SNDRV_MASK_SIZE; i++) {142 if (! mask->bits[i])143 continue;144 if (mask->bits[i] & (mask->bits[i] - 1))145 return 0;146 if (c)147 return 0;148 c++;149 }150 return 1;151}152 153static inline int snd_mask_refine(struct snd_mask *mask,154 const struct snd_mask *v)155{156 struct snd_mask old;157 snd_mask_copy(&old, mask);158 snd_mask_intersect(mask, v);159 if (snd_mask_empty(mask))160 return -EINVAL;161 return !snd_mask_eq(mask, &old);162}163 164static inline int snd_mask_refine_first(struct snd_mask *mask)165{166 if (snd_mask_single(mask))167 return 0;168 snd_mask_leave(mask, snd_mask_min(mask));169 return 1;170}171 172static inline int snd_mask_refine_last(struct snd_mask *mask)173{174 if (snd_mask_single(mask))175 return 0;176 snd_mask_leave(mask, snd_mask_max(mask));177 return 1;178}179 180static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val)181{182 if (snd_mask_min(mask) >= val)183 return 0;184 snd_mask_reset_range(mask, 0, val - 1);185 if (snd_mask_empty(mask))186 return -EINVAL;187 return 1;188}189 190static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val)191{192 if (snd_mask_max(mask) <= val)193 return 0;194 snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS);195 if (snd_mask_empty(mask))196 return -EINVAL;197 return 1;198}199 200static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val)201{202 int changed;203 changed = !snd_mask_single(mask);204 snd_mask_leave(mask, val);205 if (snd_mask_empty(mask))206 return -EINVAL;207 return changed;208}209 210static inline int snd_mask_value(const struct snd_mask *mask)211{212 return snd_mask_min(mask);213}214 215static inline void snd_interval_any(struct snd_interval *i)216{217 i->min = 0;218 i->openmin = 0;219 i->max = UINT_MAX;220 i->openmax = 0;221 i->integer = 0;222 i->empty = 0;223}224 225static inline void snd_interval_none(struct snd_interval *i)226{227 i->empty = 1;228}229 230static inline int snd_interval_checkempty(const struct snd_interval *i)231{232 return (i->min > i->max ||233 (i->min == i->max && (i->openmin || i->openmax)));234}235 236static inline int snd_interval_empty(const struct snd_interval *i)237{238 return i->empty;239}240 241static inline int snd_interval_single(const struct snd_interval *i)242{243 return (i->min == i->max || 244 (i->min + 1 == i->max && (i->openmin || i->openmax)));245}246 247static inline int snd_interval_value(const struct snd_interval *i)248{249 if (i->openmin && !i->openmax)250 return i->max;251 return i->min;252}253 254static inline int snd_interval_min(const struct snd_interval *i)255{256 return i->min;257}258 259static inline int snd_interval_max(const struct snd_interval *i)260{261 unsigned int v;262 v = i->max;263 if (i->openmax)264 v--;265 return v;266}267 268static inline int snd_interval_test(const struct snd_interval *i, unsigned int val)269{270 return !((i->min > val || (i->min == val && i->openmin) ||271 i->max < val || (i->max == val && i->openmax)));272}273 274static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s)275{276 *d = *s;277}278 279static inline int snd_interval_setinteger(struct snd_interval *i)280{281 if (i->integer)282 return 0;283 if (i->openmin && i->openmax && i->min == i->max)284 return -EINVAL;285 i->integer = 1;286 return 1;287}288 289static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2)290{291 if (i1->empty)292 return i2->empty;293 if (i2->empty)294 return i1->empty;295 return i1->min == i2->min && i1->openmin == i2->openmin &&296 i1->max == i2->max && i1->openmax == i2->openmax;297}298 299/**300 * params_access - get the access type from the hw params301 * @p: hw params302 */303static inline snd_pcm_access_t params_access(const struct snd_pcm_hw_params *p)304{305 return (__force snd_pcm_access_t)snd_mask_min(hw_param_mask_c(p,306 SNDRV_PCM_HW_PARAM_ACCESS));307}308 309/**310 * params_format - get the sample format from the hw params311 * @p: hw params312 */313static inline snd_pcm_format_t params_format(const struct snd_pcm_hw_params *p)314{315 return (__force snd_pcm_format_t)snd_mask_min(hw_param_mask_c(p,316 SNDRV_PCM_HW_PARAM_FORMAT));317}318 319/**320 * params_subformat - get the sample subformat from the hw params321 * @p: hw params322 */323static inline snd_pcm_subformat_t324params_subformat(const struct snd_pcm_hw_params *p)325{326 return (__force snd_pcm_subformat_t)snd_mask_min(hw_param_mask_c(p,327 SNDRV_PCM_HW_PARAM_SUBFORMAT));328}329 330/**331 * params_period_bytes - get the period size (in bytes) from the hw params332 * @p: hw params333 */334static inline unsigned int335params_period_bytes(const struct snd_pcm_hw_params *p)336{337 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_BYTES)->min;338}339 340/**341 * params_width - get the number of bits of the sample format from the hw params342 * @p: hw params343 *344 * This function returns the number of bits per sample that the selected sample345 * format of the hw params has.346 */347static inline int params_width(const struct snd_pcm_hw_params *p)348{349 return snd_pcm_format_width(params_format(p));350}351 352/*353 * params_physical_width - get the storage size of the sample format from the hw params354 * @p: hw params355 *356 * This functions returns the number of bits per sample that the selected sample357 * format of the hw params takes up in memory. This will be equal or larger than358 * params_width().359 */360static inline int params_physical_width(const struct snd_pcm_hw_params *p)361{362 return snd_pcm_format_physical_width(params_format(p));363}364 365int snd_pcm_hw_params_bits(const struct snd_pcm_hw_params *p);366 367static inline void368params_set_format(struct snd_pcm_hw_params *p, snd_pcm_format_t fmt)369{370 snd_mask_set_format(hw_param_mask(p, SNDRV_PCM_HW_PARAM_FORMAT), fmt);371}372 373#endif /* __SOUND_PCM_PARAMS_H */374