/* SPDX-License-Identifier: GPL-2.0-or-later */#ifndef __SOUND_PCM_PARAMS_H#define __SOUND_PCM_PARAMS_H /* *  PCM params helpers *  Copyright (c) by Abramo Bagnara <abramo@alsa-project.org> */ #include <sound/pcm.h> int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, 			   struct snd_pcm_hw_params *params,			   snd_pcm_hw_param_t var, int *dir);int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, 			  struct snd_pcm_hw_params *params,			  snd_pcm_hw_param_t var, int *dir);int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,			   snd_pcm_hw_param_t var, int *dir); #define SNDRV_MASK_BITS	64	/* we use so far 64bits only */#define SNDRV_MASK_SIZE	(SNDRV_MASK_BITS / 32)#define MASK_OFS(i)	((i) >> 5)#define MASK_BIT(i)	(1U << ((i) & 31)) static inline void snd_mask_none(struct snd_mask *mask){	memset(mask, 0, sizeof(*mask));} static inline void snd_mask_any(struct snd_mask *mask){	memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));} static inline int snd_mask_empty(const struct snd_mask *mask){	int i;	for (i = 0; i < SNDRV_MASK_SIZE; i++)		if (mask->bits[i])			return 0;	return 1;} static inline unsigned int snd_mask_min(const struct snd_mask *mask){	int i;	for (i = 0; i < SNDRV_MASK_SIZE; i++) {		if (mask->bits[i])			return __ffs(mask->bits[i]) + (i << 5);	}	return 0;} static inline unsigned int snd_mask_max(const struct snd_mask *mask){	int i;	for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {		if (mask->bits[i])			return __fls(mask->bits[i]) + (i << 5);	}	return 0;} static inline void snd_mask_set(struct snd_mask *mask, unsigned int val){	mask->bits[MASK_OFS(val)] |= MASK_BIT(val);} /* Most of drivers need only this one */static inline void snd_mask_set_format(struct snd_mask *mask,				       snd_pcm_format_t format){	snd_mask_set(mask, format);} static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val){	mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);} static inline void snd_mask_set_range(struct snd_mask *mask,				      unsigned int from, unsigned int to){	unsigned int i;	for (i = from; i <= to; i++)		mask->bits[MASK_OFS(i)] |= MASK_BIT(i);} static inline void snd_mask_reset_range(struct snd_mask *mask,					unsigned int from, unsigned int to){	unsigned int i;	for (i = from; i <= to; i++)		mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);} static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val){	unsigned int v;	v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);	snd_mask_none(mask);	mask->bits[MASK_OFS(val)] = v;} static inline void snd_mask_intersect(struct snd_mask *mask,				      const struct snd_mask *v){	int i;	for (i = 0; i < SNDRV_MASK_SIZE; i++)		mask->bits[i] &= v->bits[i];} static inline int snd_mask_eq(const struct snd_mask *mask,			      const struct snd_mask *v){	return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));} static inline void snd_mask_copy(struct snd_mask *mask,				 const struct snd_mask *v){	*mask = *v;} static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val){	return mask->bits[MASK_OFS(val)] & MASK_BIT(val);} /* Most of drivers need only this one */static inline int snd_mask_test_format(const struct snd_mask *mask,				       snd_pcm_format_t format){	return snd_mask_test(mask, format);} static inline int snd_mask_single(const struct snd_mask *mask){	int i, c = 0;	for (i = 0; i < SNDRV_MASK_SIZE; i++) {		if (! mask->bits[i])			continue;		if (mask->bits[i] & (mask->bits[i] - 1))			return 0;		if (c)			return 0;		c++;	}	return 1;} static inline int snd_mask_refine(struct snd_mask *mask,				  const struct snd_mask *v){	struct snd_mask old;	snd_mask_copy(&old, mask);	snd_mask_intersect(mask, v);	if (snd_mask_empty(mask))		return -EINVAL;	return !snd_mask_eq(mask, &old);} static inline int snd_mask_refine_first(struct snd_mask *mask){	if (snd_mask_single(mask))		return 0;	snd_mask_leave(mask, snd_mask_min(mask));	return 1;} static inline int snd_mask_refine_last(struct snd_mask *mask){	if (snd_mask_single(mask))		return 0;	snd_mask_leave(mask, snd_mask_max(mask));	return 1;} static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val){	if (snd_mask_min(mask) >= val)		return 0;	snd_mask_reset_range(mask, 0, val - 1);	if (snd_mask_empty(mask))		return -EINVAL;	return 1;} static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val){	if (snd_mask_max(mask) <= val)		return 0;	snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS);	if (snd_mask_empty(mask))		return -EINVAL;	return 1;} static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val){	int changed;	changed = !snd_mask_single(mask);	snd_mask_leave(mask, val);	if (snd_mask_empty(mask))		return -EINVAL;	return changed;} static inline int snd_mask_value(const struct snd_mask *mask){	return snd_mask_min(mask);} static inline void snd_interval_any(struct snd_interval *i){	i->min = 0;	i->openmin = 0;	i->max = UINT_MAX;	i->openmax = 0;	i->integer = 0;	i->empty = 0;} static inline void snd_interval_none(struct snd_interval *i){	i->empty = 1;} static inline int snd_interval_checkempty(const struct snd_interval *i){	return (i->min > i->max ||		(i->min == i->max && (i->openmin || i->openmax)));} static inline int snd_interval_empty(const struct snd_interval *i){	return i->empty;} static inline int snd_interval_single(const struct snd_interval *i){	return (i->min == i->max || 		(i->min + 1 == i->max && (i->openmin || i->openmax)));} static inline int snd_interval_value(const struct snd_interval *i){	if (i->openmin && !i->openmax)		return i->max;	return i->min;} static inline int snd_interval_min(const struct snd_interval *i){	return i->min;} static inline int snd_interval_max(const struct snd_interval *i){	unsigned int v;	v = i->max;	if (i->openmax)		v--;	return v;} static inline int snd_interval_test(const struct snd_interval *i, unsigned int val){	return !((i->min > val || (i->min == val && i->openmin) ||		  i->max < val || (i->max == val && i->openmax)));} static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s){	*d = *s;} static inline int snd_interval_setinteger(struct snd_interval *i){	if (i->integer)		return 0;	if (i->openmin && i->openmax && i->min == i->max)		return -EINVAL;	i->integer = 1;	return 1;} static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2){	if (i1->empty)		return i2->empty;	if (i2->empty)		return i1->empty;	return i1->min == i2->min && i1->openmin == i2->openmin &&		i1->max == i2->max && i1->openmax == i2->openmax;} /** * params_access - get the access type from the hw params * @p: hw params */static inline snd_pcm_access_t params_access(const struct snd_pcm_hw_params *p){	return snd_mask_min(hw_param_mask_c(p, SNDRV_PCM_HW_PARAM_ACCESS));} /** * params_format - get the sample format from the hw params * @p: hw params */static inline snd_pcm_format_t params_format(const struct snd_pcm_hw_params *p){	return snd_mask_min(hw_param_mask_c(p, SNDRV_PCM_HW_PARAM_FORMAT));} /** * params_subformat - get the sample subformat from the hw params * @p: hw params */static inline snd_pcm_subformat_tparams_subformat(const struct snd_pcm_hw_params *p){	return snd_mask_min(hw_param_mask_c(p, SNDRV_PCM_HW_PARAM_SUBFORMAT));} /** * params_period_bytes - get the period size (in bytes) from the hw params * @p: hw params */static inline unsigned intparams_period_bytes(const struct snd_pcm_hw_params *p){	return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_BYTES)->min;} /** * params_width - get the number of bits of the sample format from the hw params * @p: hw params * * This function returns the number of bits per sample that the selected sample * format of the hw params has. */static inline int params_width(const struct snd_pcm_hw_params *p){	return snd_pcm_format_width(params_format(p));} /* * params_physical_width - get the storage size of the sample format from the hw params * @p: hw params * * This functions returns the number of bits per sample that the selected sample * format of the hw params takes up in memory. This will be equal or larger than * params_width(). */static inline int params_physical_width(const struct snd_pcm_hw_params *p){	return snd_pcm_format_physical_width(params_format(p));} int snd_pcm_hw_params_bits(const struct snd_pcm_hw_params *p); static inline voidparams_set_format(struct snd_pcm_hw_params *p, snd_pcm_format_t fmt){	snd_mask_set_format(hw_param_mask(p, SNDRV_PCM_HW_PARAM_FORMAT), fmt);} #endif /* __SOUND_PCM_PARAMS_H */