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alsamixer: increase step size for big control value ranges

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For controls with a big range, stepping through all values can become
tedious and make it impossible to adjust the volume easily.  Therefore,
ensure that all steps are big enough so that the full range has at most
one hundred steps.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2010-12-06 14:05:10 +01:00
parent e57f619c82
commit 70a01748d5
1 changed files with 3 additions and 1 deletions
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4
alsamixer/mixer_widget.c
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@ -318,7 +318,7 @@ static void change_volume_to_percent(struct control *control, int value, unsigne
set_func(control->elem, control->volume_channels[1], min + (max - min) * value / 100);
}
static void change_volume_relative(struct control *control, int delta, unsigned int channels)
static void change_volume_relative(struct control *control, long delta, unsigned int channels)
{
int (*get_range_func)(snd_mixer_elem_t *, long *, long *);
int (*get_func)(snd_mixer_elem_t *, snd_mixer_selem_channel_id_t, long *);
@ -352,6 +352,8 @@ static void change_volume_relative(struct control *control, int delta, unsigned
if (err < 0)
return;
}
if (max - min > 100)
delta = (delta * (max - min) + (delta > 0 ? 99 : -99)) / 100;
if (channels & LEFT) {
value = left + delta;
if (value < min)