[linux.git] / include / sound / pcm_params.h

#ifndef __SOUND_PCM_PARAMS_H
#define __SOUND_PCM_PARAMS_H

/*
 *  PCM params helpers
 *  Copyright (c) by Abramo Bagnara <[email protected]>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#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 size_t snd_mask_sizeof(void)
{
	return sizeof(struct snd_mask);
}

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, (__force unsigned int)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);
}

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->openmax));
}

static inline int snd_interval_value(const struct snd_interval *i)
{
	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 (__force snd_pcm_access_t)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 (__force snd_pcm_format_t)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_t
params_subformat(const struct snd_pcm_hw_params *p)
{
	return (__force snd_pcm_subformat_t)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 int
params_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));
}

static inline void
params_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 */
Commit	Line	Data
1da177e4 LT	1	#ifndef __SOUND_PCM_PARAMS_H
	2	#define __SOUND_PCM_PARAMS_H
	3
	4	/*
	5	* PCM params helpers
	6	* Copyright (c) by Abramo Bagnara <[email protected]>
	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
f3761c39 MB	25	#include <sound/pcm.h>
f3761c39 MB	26
e88e8ae6 TI	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);
1da177e4	35
1da177e4 LT	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
9bb22e21	41	static inline size_t snd_mask_sizeof(void)
1da177e4	42	{
877211f5	43	return sizeof(struct snd_mask);
1da177e4 LT	44	}
1da177e4 LT	45
9bb22e21	46	static inline void snd_mask_none(struct snd_mask *mask)
1da177e4 LT	47	{
	48	memset(mask, 0, sizeof(*mask));
	49	}
	50
9bb22e21	51	static inline void snd_mask_any(struct snd_mask *mask)
1da177e4 LT	52	{
	53	memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
	54	}
	55
9bb22e21	56	static inline int snd_mask_empty(const struct snd_mask *mask)
1da177e4 LT	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
9bb22e21	65	static inline unsigned int snd_mask_min(const struct snd_mask *mask)
1da177e4 LT	66	{
1da177e4 LT	67	int i;
1da177e4 LT	68	for (i = 0; i < SNDRV_MASK_SIZE; i++) {
1da177e4 LT	69	if (mask->bits[i])
599ee329	70	return __ffs(mask->bits[i]) + (i << 5);
1da177e4 LT	71	}
	72	return 0;
	73	}
	74
9bb22e21	75	static inline unsigned int snd_mask_max(const struct snd_mask *mask)
1da177e4 LT	76	{
1da177e4 LT	77	int i;
1da177e4 LT	78	for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {
1da177e4 LT	79	if (mask->bits[i])
757b0376	80	return __fls(mask->bits[i]) + (i << 5);
1da177e4 LT	81	}
	82	return 0;
	83	}
	84
9bb22e21	85	static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)
1da177e4	86	{
1da177e4 LT	87	mask->bits[MASK_OFS(val)] \|= MASK_BIT(val);
	88	}
	89
0b62834e TI	90	/* Most of drivers need only this one */
	91	static inline void snd_mask_set_format(struct snd_mask *mask,
	92	snd_pcm_format_t format)
	93	{
	94	snd_mask_set(mask, (__force unsigned int)format);
	95	}
	96
9bb22e21	97	static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)
1da177e4	98	{
1da177e4 LT	99	mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
	100	}
	101
9bb22e21 TI	102	static inline void snd_mask_set_range(struct snd_mask *mask,
9bb22e21 TI	103	unsigned int from, unsigned int to)
1da177e4 LT	104	{
1da177e4 LT	105	unsigned int i;
1da177e4 LT	106	for (i = from; i <= to; i++)
	107	mask->bits[MASK_OFS(i)] \|= MASK_BIT(i);
	108	}
	109
9bb22e21 TI	110	static inline void snd_mask_reset_range(struct snd_mask *mask,
9bb22e21 TI	111	unsigned int from, unsigned int to)
1da177e4 LT	112	{
1da177e4 LT	113	unsigned int i;
1da177e4 LT	114	for (i = from; i <= to; i++)
	115	mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
	116	}
	117
9bb22e21	118	static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val)
1da177e4 LT	119	{
1da177e4 LT	120	unsigned int v;
1da177e4 LT	121	v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
	122	snd_mask_none(mask);
	123	mask->bits[MASK_OFS(val)] = v;
	124	}
	125
9bb22e21 TI	126	static inline void snd_mask_intersect(struct snd_mask *mask,
9bb22e21 TI	127	const struct snd_mask *v)
1da177e4 LT	128	{
	129	int i;
	130	for (i = 0; i < SNDRV_MASK_SIZE; i++)
	131	mask->bits[i] &= v->bits[i];
	132	}
	133
9bb22e21 TI	134	static inline int snd_mask_eq(const struct snd_mask *mask,
9bb22e21 TI	135	const struct snd_mask *v)
1da177e4 LT	136	{
	137	return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
	138	}
	139
9bb22e21 TI	140	static inline void snd_mask_copy(struct snd_mask *mask,
9bb22e21 TI	141	const struct snd_mask *v)
1da177e4 LT	142	{
	143	mask = v;
	144	}
	145
9bb22e21	146	static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val)
1da177e4	147	{
1da177e4 LT	148	return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
	149	}
	150
9bb22e21	151	static inline int snd_mask_single(const struct snd_mask *mask)
1da177e4 LT	152	{
1da177e4 LT	153	int i, c = 0;
1da177e4 LT	154	for (i = 0; i < SNDRV_MASK_SIZE; i++) {
	155	if (! mask->bits[i])
	156	continue;
	157	if (mask->bits[i] & (mask->bits[i] - 1))
	158	return 0;
	159	if (c)
	160	return 0;
	161	c++;
	162	}
	163	return 1;
	164	}
	165
9bb22e21 TI	166	static inline int snd_mask_refine(struct snd_mask *mask,
9bb22e21 TI	167	const struct snd_mask *v)
1da177e4	168	{
877211f5	169	struct snd_mask old;
1da177e4 LT	170	snd_mask_copy(&old, mask);
	171	snd_mask_intersect(mask, v);
	172	if (snd_mask_empty(mask))
	173	return -EINVAL;
	174	return !snd_mask_eq(mask, &old);
	175	}
	176
9bb22e21	177	static inline int snd_mask_refine_first(struct snd_mask *mask)
1da177e4	178	{
1da177e4 LT	179	if (snd_mask_single(mask))
	180	return 0;
	181	snd_mask_leave(mask, snd_mask_min(mask));
	182	return 1;
	183	}
	184
9bb22e21	185	static inline int snd_mask_refine_last(struct snd_mask *mask)
1da177e4	186	{
1da177e4 LT	187	if (snd_mask_single(mask))
	188	return 0;
	189	snd_mask_leave(mask, snd_mask_max(mask));
	190	return 1;
	191	}
	192
9bb22e21	193	static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val)
1da177e4	194	{
1da177e4 LT	195	if (snd_mask_min(mask) >= val)
	196	return 0;
	197	snd_mask_reset_range(mask, 0, val - 1);
	198	if (snd_mask_empty(mask))
	199	return -EINVAL;
	200	return 1;
	201	}
	202
9bb22e21	203	static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val)
1da177e4	204	{
1da177e4 LT	205	if (snd_mask_max(mask) <= val)
	206	return 0;
	207	snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS);
	208	if (snd_mask_empty(mask))
	209	return -EINVAL;
	210	return 1;
	211	}
	212
9bb22e21	213	static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val)
1da177e4 LT	214	{
1da177e4 LT	215	int changed;
1da177e4 LT	216	changed = !snd_mask_single(mask);
	217	snd_mask_leave(mask, val);
	218	if (snd_mask_empty(mask))
	219	return -EINVAL;
	220	return changed;
	221	}
	222
9bb22e21	223	static inline int snd_mask_value(const struct snd_mask *mask)
1da177e4	224	{
1da177e4 LT	225	return snd_mask_min(mask);
	226	}
	227
9bb22e21	228	static inline void snd_interval_any(struct snd_interval *i)
1da177e4 LT	229	{
	230	i->min = 0;
	231	i->openmin = 0;
	232	i->max = UINT_MAX;
	233	i->openmax = 0;
	234	i->integer = 0;
	235	i->empty = 0;
	236	}
	237
9bb22e21	238	static inline void snd_interval_none(struct snd_interval *i)
1da177e4 LT	239	{
	240	i->empty = 1;
	241	}
	242
9bb22e21	243	static inline int snd_interval_checkempty(const struct snd_interval *i)
1da177e4 LT	244	{
	245	return (i->min > i->max \|\|
	246	(i->min == i->max && (i->openmin \|\| i->openmax)));
	247	}
	248
9bb22e21	249	static inline int snd_interval_empty(const struct snd_interval *i)
1da177e4 LT	250	{
	251	return i->empty;
	252	}
	253
9bb22e21	254	static inline int snd_interval_single(const struct snd_interval *i)
1da177e4	255	{
1da177e4 LT	256	return (i->min == i->max \|\|
	257	(i->min + 1 == i->max && i->openmax));
	258	}
	259
9bb22e21	260	static inline int snd_interval_value(const struct snd_interval *i)
1da177e4	261	{
1da177e4 LT	262	return i->min;
	263	}
	264
9bb22e21	265	static inline int snd_interval_min(const struct snd_interval *i)
1da177e4	266	{
1da177e4 LT	267	return i->min;
	268	}
	269
9bb22e21	270	static inline int snd_interval_max(const struct snd_interval *i)
1da177e4 LT	271	{
1da177e4 LT	272	unsigned int v;
1da177e4 LT	273	v = i->max;
	274	if (i->openmax)
	275	v--;
	276	return v;
	277	}
	278
9bb22e21	279	static inline int snd_interval_test(const struct snd_interval *i, unsigned int val)
1da177e4 LT	280	{
	281	return !((i->min > val \|\| (i->min == val && i->openmin) \|\|
	282	i->max < val \|\| (i->max == val && i->openmax)));
	283	}
	284
9bb22e21	285	static inline void snd_interval_copy(struct snd_interval d, const struct snd_interval s)
1da177e4 LT	286	{
	287	d = s;
	288	}
	289
9bb22e21	290	static inline int snd_interval_setinteger(struct snd_interval *i)
1da177e4 LT	291	{
	292	if (i->integer)
	293	return 0;
	294	if (i->openmin && i->openmax && i->min == i->max)
	295	return -EINVAL;
	296	i->integer = 1;
	297	return 1;
	298	}
	299
9bb22e21	300	static inline int snd_interval_eq(const struct snd_interval i1, const struct snd_interval i2)
1da177e4 LT	301	{
	302	if (i1->empty)
	303	return i2->empty;
	304	if (i2->empty)
	305	return i1->empty;
	306	return i1->min == i2->min && i1->openmin == i2->openmin &&
	307	i1->max == i2->max && i1->openmax == i2->openmax;
	308	}
	309
89827ca9 LPC	310	/**
	311	* params_access - get the access type from the hw params
	312	* @p: hw params
	313	*/
744c2ad2 LPC	314	static inline snd_pcm_access_t params_access(const struct snd_pcm_hw_params *p)
	315	{
	316	return (__force snd_pcm_access_t)snd_mask_min(hw_param_mask_c(p,
	317	SNDRV_PCM_HW_PARAM_ACCESS));
	318	}
	319
89827ca9 LPC	320	/**
	321	* params_format - get the sample format from the hw params
	322	* @p: hw params
	323	*/
744c2ad2 LPC	324	static inline snd_pcm_format_t params_format(const struct snd_pcm_hw_params *p)
	325	{
	326	return (__force snd_pcm_format_t)snd_mask_min(hw_param_mask_c(p,
	327	SNDRV_PCM_HW_PARAM_FORMAT));
	328	}
	329
89827ca9 LPC	330	/**
	331	* params_subformat - get the sample subformat from the hw params
	332	* @p: hw params
	333	*/
744c2ad2 LPC	334	static inline snd_pcm_subformat_t
	335	params_subformat(const struct snd_pcm_hw_params *p)
	336	{
	337	return (__force snd_pcm_subformat_t)snd_mask_min(hw_param_mask_c(p,
	338	SNDRV_PCM_HW_PARAM_SUBFORMAT));
	339	}
1da177e4	340
89827ca9 LPC	341	/**
	342	* params_period_bytes - get the period size (in bytes) from the hw params
	343	* @p: hw params
	344	*/
b51beb75 TI	345	static inline unsigned int
	346	params_period_bytes(const struct snd_pcm_hw_params *p)
	347	{
cd9978f1	348	return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_BYTES)->min;
b51beb75 TI	349	}
b51beb75 TI	350
89827ca9 LPC	351	/**
	352	* params_width - get the number of bits of the sample format from the hw params
	353	* @p: hw params
	354	*
	355	* This function returns the number of bits per sample that the selected sample
	356	* format of the hw params has.
	357	*/
	358	static inline int params_width(const struct snd_pcm_hw_params *p)
8c5178fc MB	359	{
	360	return snd_pcm_format_width(params_format(p));
	361	}
	362
89827ca9 LPC	363	/*
	364	* params_physical_width - get the storage size of the sample format from the hw params
	365	* @p: hw params
	366	*
	367	* This functions returns the number of bits per sample that the selected sample
	368	* format of the hw params takes up in memory. This will be equal or larger than
	369	* params_width().
	370	*/
	371	static inline int params_physical_width(const struct snd_pcm_hw_params *p)
8c5178fc MB	372	{
	373	return snd_pcm_format_physical_width(params_format(p));
	374	}
	375
052a9f69 FY	376	static inline void
	377	params_set_format(struct snd_pcm_hw_params *p, snd_pcm_format_t fmt)
	378	{
0b62834e	379	snd_mask_set_format(hw_param_mask(p, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
052a9f69 FY	380	}
052a9f69 FY	381
b51beb75	382	#endif /* __SOUND_PCM_PARAMS_H */