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-rw-r--r--include/sound/pcm_params.h366
1 files changed, 366 insertions, 0 deletions
diff --git a/include/sound/pcm_params.h b/include/sound/pcm_params.h
new file mode 100644
index 000000000000..60b0e92e26f3
--- /dev/null
+++ b/include/sound/pcm_params.h
@@ -0,0 +1,366 @@
+#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 */
+
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