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implemented integer volume <-> dB volume conversion functions for simple mixer

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This commit is contained in:
Jaroslav Kysela 2008-04-21 11:44:20 +02:00
parent 82af1df465
commit 058dde8b7d
5 changed files with 139 additions and 2 deletions
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29
src/mixer/simple_none.c
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@ -1174,6 +1174,21 @@ static int convert_from_dB(snd_hctl_elem_t *ctl, struct selem_str *rec,
db_gain, value, xdir);
}
static int ask_vol_dB_ops(snd_mixer_elem_t *elem,
int dir,
long value,
long *dBvalue)
{
selem_none_t *s = snd_mixer_elem_get_private(elem);
selem_ctl_t *c;
c = get_selem_ctl(s, dir);
if (! c)
return -EINVAL;
int res = convert_to_dB(c->elem, &s->str[dir], value, dBvalue);
return res;
}
static int get_dB_ops(snd_mixer_elem_t *elem,
int dir,
snd_mixer_selem_channel_id_t channel,
@ -1219,6 +1234,18 @@ static int set_volume_ops(snd_mixer_elem_t *elem, int dir,
return 0;
}
static int ask_dB_vol_ops(snd_mixer_elem_t *elem, int dir,
long dbValue, long *value, int xdir)
{
selem_none_t *s = snd_mixer_elem_get_private(elem);
selem_ctl_t *c;
c = get_selem_ctl(s, dir);
if (! c)
return -EINVAL;
return convert_from_dB(c->elem, &s->str[dir], dbValue, value, xdir);
}
static int set_dB_ops(snd_mixer_elem_t *elem, int dir,
snd_mixer_selem_channel_id_t channel,
long db_gain, int xdir)
@ -1350,6 +1377,8 @@ static struct sm_elem_ops simple_none_ops = {
.get_range = get_range_ops,
.get_dB_range = get_dB_range_ops,
.set_range = set_range_ops,
.ask_vol_dB = ask_vol_dB_ops,
.ask_dB_vol = ask_dB_vol_ops,
.get_volume = get_volume_ops,
.get_dB = get_dB_ops,
.set_volume = set_volume_ops,