diff options
| -rw-r--r-- | include/sound/pcm.h | 12 | ||||
| -rw-r--r-- | sound/core/pcm_lib.c | 85 |
2 files changed, 97 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 1e7f74acc2ec..04fc037e0555 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -275,6 +275,12 @@ struct snd_pcm_hw_constraint_list { unsigned int mask; }; +struct snd_pcm_hw_constraint_ranges { + unsigned int count; + const struct snd_interval *ranges; + unsigned int mask; +}; + struct snd_pcm_hwptr_log; struct snd_pcm_runtime { @@ -910,6 +916,8 @@ void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, const struct snd_interval *b, struct snd_interval *c); int snd_interval_list(struct snd_interval *i, unsigned int count, const unsigned int *list, unsigned int mask); +int snd_interval_ranges(struct snd_interval *i, unsigned int count, + const struct snd_interval *list, unsigned int mask); int snd_interval_ratnum(struct snd_interval *i, unsigned int rats_count, struct snd_ratnum *rats, unsigned int *nump, unsigned int *denp); @@ -934,6 +942,10 @@ int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var, const struct snd_pcm_hw_constraint_list *l); +int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, + unsigned int cond, + snd_pcm_hw_param_t var, + const struct snd_pcm_hw_constraint_ranges *r); int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var, diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index ec9e7866177f..446c00bd908b 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -1015,6 +1015,60 @@ int snd_interval_list(struct snd_interval *i, unsigned int count, EXPORT_SYMBOL(snd_interval_list); +/** + * snd_interval_ranges - refine the interval value from the list of ranges + * @i: the interval value to refine + * @count: the number of elements in the list of ranges + * @ranges: the ranges list + * @mask: the bit-mask to evaluate + * + * Refines the interval value from the list of ranges. + * When mask is non-zero, only the elements corresponding to bit 1 are + * evaluated. + * + * Return: Positive if the value is changed, zero if it's not changed, or a + * negative error code. + */ +int snd_interval_ranges(struct snd_interval *i, unsigned int count, + const struct snd_interval *ranges, unsigned int mask) +{ + unsigned int k; + struct snd_interval range_union; + struct snd_interval range; + + if (!count) { + snd_interval_none(i); + return -EINVAL; + } + snd_interval_any(&range_union); + range_union.min = UINT_MAX; + range_union.max = 0; + for (k = 0; k < count; k++) { + if (mask && !(mask & (1 << k))) + continue; + snd_interval_copy(&range, &ranges[k]); + if (snd_interval_refine(&range, i) < 0) + continue; + if (snd_interval_empty(&range)) + continue; + + if (range.min < range_union.min) { + range_union.min = range.min; + range_union.openmin = 1; + } + if (range.min == range_union.min && !range.openmin) + range_union.openmin = 0; + if (range.max > range_union.max) { + range_union.max = range.max; + range_union.openmax = 1; + } + if (range.max == range_union.max && !range.openmax) + range_union.openmax = 0; + } + return snd_interval_refine(i, &range_union); +} +EXPORT_SYMBOL(snd_interval_ranges); + static int snd_interval_step(struct snd_interval *i, unsigned int step) { unsigned int n; @@ -1221,6 +1275,37 @@ int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, EXPORT_SYMBOL(snd_pcm_hw_constraint_list); +static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + struct snd_pcm_hw_constraint_ranges *r = rule->private; + return snd_interval_ranges(hw_param_interval(params, rule->var), + r->count, r->ranges, r->mask); +} + + +/** + * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter + * @runtime: PCM runtime instance + * @cond: condition bits + * @var: hw_params variable to apply the list of range constraints + * @r: ranges + * + * Apply the list of range constraints to an interval parameter. + * + * Return: Zero if successful, or a negative error code on failure. + */ +int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, + unsigned int cond, + snd_pcm_hw_param_t var, + const struct snd_pcm_hw_constraint_ranges *r) +{ + return snd_pcm_hw_rule_add(runtime, cond, var, + snd_pcm_hw_rule_ranges, (void *)r, + var, -1); +} +EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); + static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { |