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ALSA: pcm: Fix snd_interval_refine first/last with open min/max 

Without this commit the following intervals [x y), (x y) were be
replaced to (y-1 y) by snd_interval_refine_last(). This was also done
if y-1 is part of the previous interval.
With this changes it will be replaced with [y-1 y) in case of y-1 is
part of the previous interval. A similar behavior will be used for
snd_interval_refine_first().

This commit adapts the changes for alsa-lib of commit
9bb985c ("pcm: snd_interval_refine_first/last: exclude value only if
also excluded before")

Signed-off-by: Timo Wischer <twischer@de.adit-jv.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Timo Wischer 2018-07-10 17:28:45 +02:00 committed by Takashi Iwai
parent d64c5cf8e8
commit ff2d6acdf6
1 changed files with 10 additions and 4 deletions
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14
sound/core/pcm_lib.c
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@ -627,27 +627,33 @@ EXPORT_SYMBOL(snd_interval_refine);
static int snd_interval_refine_first(struct snd_interval *i)
{
const unsigned int last_max = i->max;
if (snd_BUG_ON(snd_interval_empty(i)))
return -EINVAL;
if (snd_interval_single(i))
return 0;
i->max = i->min;
i->openmax = i->openmin;
if (i->openmax)
if (i->openmin)
i->max++;
/* only exclude max value if also excluded before refine */
i->openmax = (i->openmax && i->max >= last_max);
return 1;
}
static int snd_interval_refine_last(struct snd_interval *i)
{
const unsigned int last_min = i->min;
if (snd_BUG_ON(snd_interval_empty(i)))
return -EINVAL;
if (snd_interval_single(i))
return 0;
i->min = i->max;
i->openmin = i->openmax;
if (i->openmin)
if (i->openmax)
i->min--;
/* only exclude min value if also excluded before refine */
i->openmin = (i->openmin && i->min <= last_min);
return 1;
}