367 lines
8.3 KiB
C
367 lines
8.3 KiB
C
#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 */
|
|
|