include/sound/pcm_params.h - pub/scm/linux/kernel/git/pavel/linux-n900 - Git at Google

 #ifndef __SOUND_PCM_PARAMS_H
 #define __SOUND_PCM_PARAMS_H

 /*
  *  PCM params helpers
  *  Copyright (c) by Abramo Bagnara <abramo@alsa-project.org>
  *
  *
  *   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
  *
  */

 extern int snd_pcm_hw_param_mask(snd_pcm_substream_t *pcm, snd_pcm_hw_params_t *params,
 				 snd_pcm_hw_param_t var, const snd_mask_t *val);
 extern unsigned int snd_pcm_hw_param_value_min(const snd_pcm_hw_params_t *params,
 					       snd_pcm_hw_param_t var, int *dir);
 extern unsigned int snd_pcm_hw_param_value_max(const snd_pcm_hw_params_t *params,
 					       snd_pcm_hw_param_t var, int *dir);
 extern int _snd_pcm_hw_param_min(snd_pcm_hw_params_t *params,
 				 snd_pcm_hw_param_t var, unsigned int val, int dir);
 extern int _snd_pcm_hw_param_setinteger(snd_pcm_hw_params_t *params,
 					snd_pcm_hw_param_t var);
 extern int _snd_pcm_hw_param_set(snd_pcm_hw_params_t *params,
 				 snd_pcm_hw_param_t var, unsigned int val, int dir);

 /* To share the same code we have  alsa-lib */
 #define INLINE static inline
 #define assert(a) (void)(a)

 #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))

 INLINE unsigned int ld2(u_int32_t v)
 {
         unsigned r = 0;

         if (v >= 0x10000) {
                 v >>= 16;
                 r += 16;
         }
         if (v >= 0x100) {
                 v >>= 8;
                 r += 8;
         }
         if (v >= 0x10) {
                 v >>= 4;
                 r += 4;
         }
         if (v >= 4) {
                 v >>= 2;
                 r += 2;
         }
         if (v >= 2)
                 r++;
         return r;
 }

 INLINE size_t snd_mask_sizeof(void)
 {
 	return sizeof(snd_mask_t);
 }

 INLINE void snd_mask_none(snd_mask_t *mask)
 {
 	memset(mask, 0, sizeof(*mask));
 }

 INLINE void snd_mask_any(snd_mask_t *mask)
 {
 	memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
 }

 INLINE int snd_mask_empty(const snd_mask_t *mask)
 {
 	int i;
 	for (i = 0; i < SNDRV_MASK_SIZE; i++)
 		if (mask->bits[i])
 			return 0;
 	return 1;
 }

 INLINE unsigned int snd_mask_min(const snd_mask_t *mask)
 {
 	int i;
 	assert(!snd_mask_empty(mask));
 	for (i = 0; i < SNDRV_MASK_SIZE; i++) {
 		if (mask->bits[i])
 			return ffs(mask->bits[i]) - 1 + (i << 5);
 	}
 	return 0;
 }

 INLINE unsigned int snd_mask_max(const snd_mask_t *mask)
 {
 	int i;
 	assert(!snd_mask_empty(mask));
 	for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {
 		if (mask->bits[i])
 			return ld2(mask->bits[i]) + (i << 5);
 	}
 	return 0;
 }

 INLINE void snd_mask_set(snd_mask_t *mask, unsigned int val)
 {
 	assert(val <= SNDRV_MASK_BITS);
 	mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
 }

 INLINE void snd_mask_reset(snd_mask_t *mask, unsigned int val)
 {
 	assert(val <= SNDRV_MASK_BITS);
 	mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
 }

 INLINE void snd_mask_set_range(snd_mask_t *mask, unsigned int from, unsigned int to)
 {
 	unsigned int i;
 	assert(to <= SNDRV_MASK_BITS && from <= to);
 	for (i = from; i <= to; i++)
 		mask->bits[MASK_OFS(i)] |= MASK_BIT(i);
 }

 INLINE void snd_mask_reset_range(snd_mask_t *mask, unsigned int from, unsigned int to)
 {
 	unsigned int i;
 	assert(to <= SNDRV_MASK_BITS && from <= to);
 	for (i = from; i <= to; i++)
 		mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
 }

 INLINE void snd_mask_leave(snd_mask_t *mask, unsigned int val)
 {
 	unsigned int v;
 	assert(val <= SNDRV_MASK_BITS);
 	v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
 	snd_mask_none(mask);
 	mask->bits[MASK_OFS(val)] = v;
 }

 INLINE void snd_mask_intersect(snd_mask_t *mask, const snd_mask_t *v)
 {
 	int i;
 	for (i = 0; i < SNDRV_MASK_SIZE; i++)
 		mask->bits[i] &= v->bits[i];
 }

 INLINE int snd_mask_eq(const snd_mask_t *mask, const snd_mask_t *v)
 {
 	return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
 }

 INLINE void snd_mask_copy(snd_mask_t *mask, const snd_mask_t *v)
 {
 	*mask = *v;
 }

 INLINE int snd_mask_test(const snd_mask_t *mask, unsigned int val)
 {
 	assert(val <= SNDRV_MASK_BITS);
 	return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
 }

 INLINE int snd_mask_single(const snd_mask_t *mask)
 {
 	int i, c = 0;
 	assert(!snd_mask_empty(mask));
 	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;
 }

 INLINE int snd_mask_refine(snd_mask_t *mask, const snd_mask_t *v)
 {
 	snd_mask_t old;
 	assert(!snd_mask_empty(mask));
 	snd_mask_copy(&old, mask);
 	snd_mask_intersect(mask, v);
 	if (snd_mask_empty(mask))
 		return -EINVAL;
 	return !snd_mask_eq(mask, &old);
 }

 INLINE int snd_mask_refine_first(snd_mask_t *mask)
 {
 	assert(!snd_mask_empty(mask));
 	if (snd_mask_single(mask))
 		return 0;
 	snd_mask_leave(mask, snd_mask_min(mask));
 	return 1;
 }

 INLINE int snd_mask_refine_last(snd_mask_t *mask)
 {
 	assert(!snd_mask_empty(mask));
 	if (snd_mask_single(mask))
 		return 0;
 	snd_mask_leave(mask, snd_mask_max(mask));
 	return 1;
 }

 INLINE int snd_mask_refine_min(snd_mask_t *mask, unsigned int val)
 {
 	assert(!snd_mask_empty(mask));
 	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;
 }

 INLINE int snd_mask_refine_max(snd_mask_t *mask, unsigned int val)
 {
 	assert(!snd_mask_empty(mask));
 	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;
 }

 INLINE int snd_mask_refine_set(snd_mask_t *mask, unsigned int val)
 {
 	int changed;
 	assert(!snd_mask_empty(mask));
 	changed = !snd_mask_single(mask);
 	snd_mask_leave(mask, val);
 	if (snd_mask_empty(mask))
 		return -EINVAL;
 	return changed;
 }

 INLINE int snd_mask_value(const snd_mask_t *mask)
 {
 	assert(!snd_mask_empty(mask));
 	return snd_mask_min(mask);
 }

 INLINE void snd_interval_any(snd_interval_t *i)
 {
 	i->min = 0;
 	i->openmin = 0;
 	i->max = UINT_MAX;
 	i->openmax = 0;
 	i->integer = 0;
 	i->empty = 0;
 }

 INLINE void snd_interval_none(snd_interval_t *i)
 {
 	i->empty = 1;
 }

 INLINE int snd_interval_checkempty(const snd_interval_t *i)
 {
 	return (i->min > i->max ||
 		(i->min == i->max && (i->openmin || i->openmax)));
 }

 INLINE int snd_interval_empty(const snd_interval_t *i)
 {
 	return i->empty;
 }

 INLINE int snd_interval_single(const snd_interval_t *i)
 {
 	assert(!snd_interval_empty(i));
 	return (i->min == i->max ||
 		(i->min + 1 == i->max && i->openmax));
 }

 INLINE int snd_interval_value(const snd_interval_t *i)
 {
 	assert(snd_interval_single(i));
 	return i->min;
 }

 INLINE int snd_interval_min(const snd_interval_t *i)
 {
 	assert(!snd_interval_empty(i));
 	return i->min;
 }

 INLINE int snd_interval_max(const snd_interval_t *i)
 {
 	unsigned int v;
 	assert(!snd_interval_empty(i));
 	v = i->max;
 	if (i->openmax)
 		v--;
 	return v;
 }

 INLINE int snd_interval_test(const snd_interval_t *i, unsigned int val)
 {
 	return !((i->min > val || (i->min == val && i->openmin) ||
 		  i->max < val || (i->max == val && i->openmax)));
 }

 INLINE void snd_interval_copy(snd_interval_t *d, const snd_interval_t *s)
 {
 	*d = *s;
 }

 INLINE int snd_interval_setinteger(snd_interval_t *i)
 {
 	if (i->integer)
 		return 0;
 	if (i->openmin && i->openmax && i->min == i->max)
 		return -EINVAL;
 	i->integer = 1;
 	return 1;
 }

 INLINE int snd_interval_eq(const snd_interval_t *i1, const snd_interval_t *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;
 }

 static inline unsigned int add(unsigned int a, unsigned int b)
 {
 	if (a >= UINT_MAX - b)
 		return UINT_MAX;
 	return a + b;
 }

 static inline unsigned int sub(unsigned int a, unsigned int b)
 {
 	if (a > b)
 		return a - b;
 	return 0;
 }

 #undef INLINE
 #undef assert

 #endif /* __SOUND_PCM_PARAMS_H */
	#ifndef __SOUND_PCM_PARAMS_H
	#define __SOUND_PCM_PARAMS_H

	/*
	* PCM params helpers
	* Copyright (c) by Abramo Bagnara <abramo@alsa-project.org>
	*
	*
	* 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
	*
	*/

	extern int snd_pcm_hw_param_mask(snd_pcm_substream_t pcm, snd_pcm_hw_params_t params,
	snd_pcm_hw_param_t var, const snd_mask_t *val);
	extern unsigned int snd_pcm_hw_param_value_min(const snd_pcm_hw_params_t *params,
	snd_pcm_hw_param_t var, int *dir);
	extern unsigned int snd_pcm_hw_param_value_max(const snd_pcm_hw_params_t *params,
	snd_pcm_hw_param_t var, int *dir);
	extern int _snd_pcm_hw_param_min(snd_pcm_hw_params_t *params,
	snd_pcm_hw_param_t var, unsigned int val, int dir);
	extern int _snd_pcm_hw_param_setinteger(snd_pcm_hw_params_t *params,
	snd_pcm_hw_param_t var);
	extern int _snd_pcm_hw_param_set(snd_pcm_hw_params_t *params,
	snd_pcm_hw_param_t var, unsigned int val, int dir);

	/* To share the same code we have alsa-lib */
	#define INLINE static inline
	#define assert(a) (void)(a)

	#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))

	INLINE unsigned int ld2(u_int32_t v)
	{
	unsigned r = 0;

	if (v >= 0x10000) {
	v >>= 16;
	r += 16;
	}
	if (v >= 0x100) {
	v >>= 8;
	r += 8;
	}
	if (v >= 0x10) {
	v >>= 4;
	r += 4;
	}
	if (v >= 4) {
	v >>= 2;
	r += 2;
	}
	if (v >= 2)
	r++;
	return r;
	}

	INLINE size_t snd_mask_sizeof(void)
	{
	return sizeof(snd_mask_t);
	}

	INLINE void snd_mask_none(snd_mask_t *mask)
	{
	memset(mask, 0, sizeof(*mask));
	}

	INLINE void snd_mask_any(snd_mask_t *mask)
	{
	memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
	}

	INLINE int snd_mask_empty(const snd_mask_t *mask)
	{
	int i;
	for (i = 0; i < SNDRV_MASK_SIZE; i++)
	if (mask->bits[i])
	return 0;
	return 1;
	}

	INLINE unsigned int snd_mask_min(const snd_mask_t *mask)
	{
	int i;
	assert(!snd_mask_empty(mask));
	for (i = 0; i < SNDRV_MASK_SIZE; i++) {
	if (mask->bits[i])
	return ffs(mask->bits[i]) - 1 + (i << 5);
	}
	return 0;
	}

	INLINE unsigned int snd_mask_max(const snd_mask_t *mask)
	{
	int i;
	assert(!snd_mask_empty(mask));
	for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {
	if (mask->bits[i])
	return ld2(mask->bits[i]) + (i << 5);
	}
	return 0;
	}

	INLINE void snd_mask_set(snd_mask_t *mask, unsigned int val)
	{
	assert(val <= SNDRV_MASK_BITS);
	mask->bits[MASK_OFS(val)] \|= MASK_BIT(val);
	}

	INLINE void snd_mask_reset(snd_mask_t *mask, unsigned int val)
	{
	assert(val <= SNDRV_MASK_BITS);
	mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
	}

	INLINE void snd_mask_set_range(snd_mask_t *mask, unsigned int from, unsigned int to)
	{
	unsigned int i;
	assert(to <= SNDRV_MASK_BITS && from <= to);
	for (i = from; i <= to; i++)
	mask->bits[MASK_OFS(i)] \|= MASK_BIT(i);
	}

	INLINE void snd_mask_reset_range(snd_mask_t *mask, unsigned int from, unsigned int to)
	{
	unsigned int i;
	assert(to <= SNDRV_MASK_BITS && from <= to);
	for (i = from; i <= to; i++)
	mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
	}

	INLINE void snd_mask_leave(snd_mask_t *mask, unsigned int val)
	{
	unsigned int v;
	assert(val <= SNDRV_MASK_BITS);
	v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
	snd_mask_none(mask);
	mask->bits[MASK_OFS(val)] = v;
	}

	INLINE void snd_mask_intersect(snd_mask_t mask, const snd_mask_t v)
	{
	int i;
	for (i = 0; i < SNDRV_MASK_SIZE; i++)
	mask->bits[i] &= v->bits[i];
	}

	INLINE int snd_mask_eq(const snd_mask_t mask, const snd_mask_t v)
	{
	return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
	}

	INLINE void snd_mask_copy(snd_mask_t mask, const snd_mask_t v)
	{
	mask = v;
	}

	INLINE int snd_mask_test(const snd_mask_t *mask, unsigned int val)
	{
	assert(val <= SNDRV_MASK_BITS);
	return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
	}

	INLINE int snd_mask_single(const snd_mask_t *mask)
	{
	int i, c = 0;
	assert(!snd_mask_empty(mask));
	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;
	}

	INLINE int snd_mask_refine(snd_mask_t mask, const snd_mask_t v)
	{
	snd_mask_t old;
	assert(!snd_mask_empty(mask));
	snd_mask_copy(&old, mask);
	snd_mask_intersect(mask, v);
	if (snd_mask_empty(mask))
	return -EINVAL;
	return !snd_mask_eq(mask, &old);
	}

	INLINE int snd_mask_refine_first(snd_mask_t *mask)
	{
	assert(!snd_mask_empty(mask));
	if (snd_mask_single(mask))
	return 0;
	snd_mask_leave(mask, snd_mask_min(mask));
	return 1;
	}

	INLINE int snd_mask_refine_last(snd_mask_t *mask)
	{
	assert(!snd_mask_empty(mask));
	if (snd_mask_single(mask))
	return 0;
	snd_mask_leave(mask, snd_mask_max(mask));
	return 1;
	}

	INLINE int snd_mask_refine_min(snd_mask_t *mask, unsigned int val)
	{
	assert(!snd_mask_empty(mask));
	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;
	}

	INLINE int snd_mask_refine_max(snd_mask_t *mask, unsigned int val)
	{
	assert(!snd_mask_empty(mask));
	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;
	}

	INLINE int snd_mask_refine_set(snd_mask_t *mask, unsigned int val)
	{
	int changed;
	assert(!snd_mask_empty(mask));
	changed = !snd_mask_single(mask);
	snd_mask_leave(mask, val);
	if (snd_mask_empty(mask))
	return -EINVAL;
	return changed;
	}

	INLINE int snd_mask_value(const snd_mask_t *mask)
	{
	assert(!snd_mask_empty(mask));
	return snd_mask_min(mask);
	}

	INLINE void snd_interval_any(snd_interval_t *i)
	{
	i->min = 0;
	i->openmin = 0;
	i->max = UINT_MAX;
	i->openmax = 0;
	i->integer = 0;
	i->empty = 0;
	}

	INLINE void snd_interval_none(snd_interval_t *i)
	{
	i->empty = 1;
	}

	INLINE int snd_interval_checkempty(const snd_interval_t *i)
	{
	return (i->min > i->max \|\|
	(i->min == i->max && (i->openmin \|\| i->openmax)));
	}

	INLINE int snd_interval_empty(const snd_interval_t *i)
	{
	return i->empty;
	}

	INLINE int snd_interval_single(const snd_interval_t *i)
	{
	assert(!snd_interval_empty(i));
	return (i->min == i->max \|\|
	(i->min + 1 == i->max && i->openmax));
	}

	INLINE int snd_interval_value(const snd_interval_t *i)
	{
	assert(snd_interval_single(i));
	return i->min;
	}

	INLINE int snd_interval_min(const snd_interval_t *i)
	{
	assert(!snd_interval_empty(i));
	return i->min;
	}

	INLINE int snd_interval_max(const snd_interval_t *i)
	{
	unsigned int v;
	assert(!snd_interval_empty(i));
	v = i->max;
	if (i->openmax)
	v--;
	return v;
	}

	INLINE int snd_interval_test(const snd_interval_t *i, unsigned int val)
	{
	return !((i->min > val \|\| (i->min == val && i->openmin) \|\|
	i->max < val \|\| (i->max == val && i->openmax)));
	}

	INLINE void snd_interval_copy(snd_interval_t d, const snd_interval_t s)
	{
	d = s;
	}

	INLINE int snd_interval_setinteger(snd_interval_t *i)
	{
	if (i->integer)
	return 0;
	if (i->openmin && i->openmax && i->min == i->max)
	return -EINVAL;
	i->integer = 1;
	return 1;
	}

	INLINE int snd_interval_eq(const snd_interval_t i1, const snd_interval_t 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;
	}

	static inline unsigned int add(unsigned int a, unsigned int b)
	{
	if (a >= UINT_MAX - b)
	return UINT_MAX;
	return a + b;
	}

	static inline unsigned int sub(unsigned int a, unsigned int b)
	{
	if (a > b)
	return a - b;
	return 0;
	}

	#undef INLINE
	#undef assert

	#endif /* __SOUND_PCM_PARAMS_H */