--- /dev/null
+#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
+ *
+ */
+
+#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);
+}
+
+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(hw_param_mask(p, SNDRV_PCM_HW_PARAM_FORMAT),
+ (__force int)fmt);
+}
+
+#endif /* __SOUND_PCM_PARAMS_H */
Code Review / kvmfornfv.git / blobdiff