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371 lines
8.7 KiB
371 lines
8.7 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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#ifndef __SOUND_PCM_PARAMS_H |
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#define __SOUND_PCM_PARAMS_H |
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/* |
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* PCM params helpers |
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* Copyright (c) by Abramo Bagnara <[email protected]> |
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*/ |
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#include <sound/pcm.h> |
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int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
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struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, int *dir); |
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int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
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struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, int *dir); |
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int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, int *dir); |
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#define SNDRV_MASK_BITS 64 /* we use so far 64bits only */ |
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#define SNDRV_MASK_SIZE (SNDRV_MASK_BITS / 32) |
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#define MASK_OFS(i) ((i) >> 5) |
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#define MASK_BIT(i) (1U << ((i) & 31)) |
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static inline void snd_mask_none(struct snd_mask *mask) |
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{ |
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memset(mask, 0, sizeof(*mask)); |
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} |
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static inline void snd_mask_any(struct snd_mask *mask) |
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{ |
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memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t)); |
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} |
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static inline int snd_mask_empty(const struct snd_mask *mask) |
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{ |
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int i; |
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for (i = 0; i < SNDRV_MASK_SIZE; i++) |
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if (mask->bits[i]) |
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return 0; |
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return 1; |
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} |
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static inline unsigned int snd_mask_min(const struct snd_mask *mask) |
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{ |
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int i; |
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for (i = 0; i < SNDRV_MASK_SIZE; i++) { |
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if (mask->bits[i]) |
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return __ffs(mask->bits[i]) + (i << 5); |
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} |
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return 0; |
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} |
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static inline unsigned int snd_mask_max(const struct snd_mask *mask) |
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{ |
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int i; |
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for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) { |
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if (mask->bits[i]) |
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return __fls(mask->bits[i]) + (i << 5); |
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} |
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return 0; |
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} |
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static inline void snd_mask_set(struct snd_mask *mask, unsigned int val) |
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{ |
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mask->bits[MASK_OFS(val)] |= MASK_BIT(val); |
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} |
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/* Most of drivers need only this one */ |
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static inline void snd_mask_set_format(struct snd_mask *mask, |
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snd_pcm_format_t format) |
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{ |
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snd_mask_set(mask, (__force unsigned int)format); |
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} |
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static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val) |
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{ |
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mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val); |
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} |
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static inline void snd_mask_set_range(struct snd_mask *mask, |
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unsigned int from, unsigned int to) |
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{ |
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unsigned int i; |
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for (i = from; i <= to; i++) |
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mask->bits[MASK_OFS(i)] |= MASK_BIT(i); |
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} |
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static inline void snd_mask_reset_range(struct snd_mask *mask, |
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unsigned int from, unsigned int to) |
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{ |
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unsigned int i; |
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for (i = from; i <= to; i++) |
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mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i); |
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} |
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static inline void snd_mask_leave(struct snd_mask *mask, unsigned int val) |
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{ |
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unsigned int v; |
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v = mask->bits[MASK_OFS(val)] & MASK_BIT(val); |
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snd_mask_none(mask); |
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mask->bits[MASK_OFS(val)] = v; |
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} |
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static inline void snd_mask_intersect(struct snd_mask *mask, |
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const struct snd_mask *v) |
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{ |
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int i; |
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for (i = 0; i < SNDRV_MASK_SIZE; i++) |
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mask->bits[i] &= v->bits[i]; |
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} |
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static inline int snd_mask_eq(const struct snd_mask *mask, |
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const struct snd_mask *v) |
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{ |
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return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t)); |
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} |
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static inline void snd_mask_copy(struct snd_mask *mask, |
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const struct snd_mask *v) |
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{ |
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*mask = *v; |
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} |
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static inline int snd_mask_test(const struct snd_mask *mask, unsigned int val) |
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{ |
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return mask->bits[MASK_OFS(val)] & MASK_BIT(val); |
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} |
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/* Most of drivers need only this one */ |
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static inline int snd_mask_test_format(const struct snd_mask *mask, |
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snd_pcm_format_t format) |
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{ |
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return snd_mask_test(mask, (__force unsigned int)format); |
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} |
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static inline int snd_mask_single(const struct snd_mask *mask) |
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{ |
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int i, c = 0; |
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for (i = 0; i < SNDRV_MASK_SIZE; i++) { |
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if (! mask->bits[i]) |
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continue; |
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if (mask->bits[i] & (mask->bits[i] - 1)) |
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return 0; |
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if (c) |
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return 0; |
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c++; |
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} |
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return 1; |
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} |
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static inline int snd_mask_refine(struct snd_mask *mask, |
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const struct snd_mask *v) |
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{ |
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struct snd_mask old; |
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snd_mask_copy(&old, mask); |
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snd_mask_intersect(mask, v); |
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if (snd_mask_empty(mask)) |
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return -EINVAL; |
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return !snd_mask_eq(mask, &old); |
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} |
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static inline int snd_mask_refine_first(struct snd_mask *mask) |
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{ |
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if (snd_mask_single(mask)) |
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return 0; |
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snd_mask_leave(mask, snd_mask_min(mask)); |
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return 1; |
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} |
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static inline int snd_mask_refine_last(struct snd_mask *mask) |
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{ |
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if (snd_mask_single(mask)) |
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return 0; |
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snd_mask_leave(mask, snd_mask_max(mask)); |
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return 1; |
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} |
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static inline int snd_mask_refine_min(struct snd_mask *mask, unsigned int val) |
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{ |
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if (snd_mask_min(mask) >= val) |
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return 0; |
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snd_mask_reset_range(mask, 0, val - 1); |
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if (snd_mask_empty(mask)) |
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return -EINVAL; |
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return 1; |
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} |
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static inline int snd_mask_refine_max(struct snd_mask *mask, unsigned int val) |
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{ |
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if (snd_mask_max(mask) <= val) |
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return 0; |
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snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS); |
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if (snd_mask_empty(mask)) |
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return -EINVAL; |
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return 1; |
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} |
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static inline int snd_mask_refine_set(struct snd_mask *mask, unsigned int val) |
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{ |
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int changed; |
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changed = !snd_mask_single(mask); |
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snd_mask_leave(mask, val); |
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if (snd_mask_empty(mask)) |
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return -EINVAL; |
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return changed; |
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} |
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static inline int snd_mask_value(const struct snd_mask *mask) |
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{ |
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return snd_mask_min(mask); |
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} |
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static inline void snd_interval_any(struct snd_interval *i) |
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{ |
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i->min = 0; |
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i->openmin = 0; |
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i->max = UINT_MAX; |
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i->openmax = 0; |
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i->integer = 0; |
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i->empty = 0; |
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} |
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static inline void snd_interval_none(struct snd_interval *i) |
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{ |
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i->empty = 1; |
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} |
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static inline int snd_interval_checkempty(const struct snd_interval *i) |
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{ |
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return (i->min > i->max || |
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(i->min == i->max && (i->openmin || i->openmax))); |
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} |
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static inline int snd_interval_empty(const struct snd_interval *i) |
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{ |
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return i->empty; |
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} |
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static inline int snd_interval_single(const struct snd_interval *i) |
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{ |
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return (i->min == i->max || |
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(i->min + 1 == i->max && (i->openmin || i->openmax))); |
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} |
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static inline int snd_interval_value(const struct snd_interval *i) |
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{ |
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if (i->openmin && !i->openmax) |
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return i->max; |
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return i->min; |
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} |
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static inline int snd_interval_min(const struct snd_interval *i) |
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{ |
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return i->min; |
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} |
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static inline int snd_interval_max(const struct snd_interval *i) |
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{ |
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unsigned int v; |
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v = i->max; |
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if (i->openmax) |
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v--; |
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return v; |
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} |
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static inline int snd_interval_test(const struct snd_interval *i, unsigned int val) |
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{ |
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return !((i->min > val || (i->min == val && i->openmin) || |
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i->max < val || (i->max == val && i->openmax))); |
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} |
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static inline void snd_interval_copy(struct snd_interval *d, const struct snd_interval *s) |
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{ |
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*d = *s; |
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} |
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static inline int snd_interval_setinteger(struct snd_interval *i) |
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{ |
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if (i->integer) |
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return 0; |
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if (i->openmin && i->openmax && i->min == i->max) |
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return -EINVAL; |
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i->integer = 1; |
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return 1; |
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} |
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static inline int snd_interval_eq(const struct snd_interval *i1, const struct snd_interval *i2) |
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{ |
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if (i1->empty) |
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return i2->empty; |
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if (i2->empty) |
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return i1->empty; |
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return i1->min == i2->min && i1->openmin == i2->openmin && |
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i1->max == i2->max && i1->openmax == i2->openmax; |
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} |
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/** |
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* params_access - get the access type from the hw params |
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* @p: hw params |
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*/ |
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static inline snd_pcm_access_t params_access(const struct snd_pcm_hw_params *p) |
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{ |
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return (__force snd_pcm_access_t)snd_mask_min(hw_param_mask_c(p, |
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SNDRV_PCM_HW_PARAM_ACCESS)); |
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} |
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/** |
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* params_format - get the sample format from the hw params |
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* @p: hw params |
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*/ |
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static inline snd_pcm_format_t params_format(const struct snd_pcm_hw_params *p) |
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{ |
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return (__force snd_pcm_format_t)snd_mask_min(hw_param_mask_c(p, |
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SNDRV_PCM_HW_PARAM_FORMAT)); |
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} |
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/** |
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* params_subformat - get the sample subformat from the hw params |
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* @p: hw params |
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*/ |
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static inline snd_pcm_subformat_t |
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params_subformat(const struct snd_pcm_hw_params *p) |
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{ |
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return (__force snd_pcm_subformat_t)snd_mask_min(hw_param_mask_c(p, |
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SNDRV_PCM_HW_PARAM_SUBFORMAT)); |
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} |
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/** |
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* params_period_bytes - get the period size (in bytes) from the hw params |
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* @p: hw params |
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*/ |
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static inline unsigned int |
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params_period_bytes(const struct snd_pcm_hw_params *p) |
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{ |
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return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_BYTES)->min; |
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} |
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/** |
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* params_width - get the number of bits of the sample format from the hw params |
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* @p: hw params |
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* |
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* This function returns the number of bits per sample that the selected sample |
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* format of the hw params has. |
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*/ |
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static inline int params_width(const struct snd_pcm_hw_params *p) |
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{ |
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return snd_pcm_format_width(params_format(p)); |
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} |
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/* |
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* params_physical_width - get the storage size of the sample format from the hw params |
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* @p: hw params |
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* |
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* This functions returns the number of bits per sample that the selected sample |
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* format of the hw params takes up in memory. This will be equal or larger than |
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* params_width(). |
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*/ |
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static inline int params_physical_width(const struct snd_pcm_hw_params *p) |
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{ |
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return snd_pcm_format_physical_width(params_format(p)); |
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} |
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static inline void |
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params_set_format(struct snd_pcm_hw_params *p, snd_pcm_format_t fmt) |
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{ |
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snd_mask_set_format(hw_param_mask(p, SNDRV_PCM_HW_PARAM_FORMAT), fmt); |
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} |
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#endif /* __SOUND_PCM_PARAMS_H */
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