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Add dB_range ops for simple mixer

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Added the dB_range ops for simple mixer.
This commit is contained in:
Takashi Iwai 2006-08-25 11:54:59 +02:00
parent 5c71dd3ee7
commit 448cbb6141
1 changed files with 58 additions and 22 deletions
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80
src/mixer/simple_none.c
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@ -945,14 +945,6 @@ static int get_range_ops(snd_mixer_elem_t *elem, int dir,
return 0;
}
static int get_dB_range_ops(snd_mixer_elem_t *elem ATTRIBUTE_UNUSED,
int dir ATTRIBUTE_UNUSED,
long *min ATTRIBUTE_UNUSED,
long *max ATTRIBUTE_UNUSED)
{
return -ENXIO;
}
static int set_range_ops(snd_mixer_elem_t *elem, int dir,
long min, long max)
{
@ -1075,6 +1067,60 @@ static int init_db_range(snd_hctl_elem_t *ctl, struct selem_str *rec)
return -EINVAL;
}
/* get selem_ctl for TLV access */
static selem_ctl_t *get_selem_ctl(selem_none_t *s, int dir)
{
selem_ctl_t *c;
if (dir == SM_PLAY)
c = &s->ctls[CTL_PLAYBACK_VOLUME];
else if (dir == SM_CAPT)
c = &s->ctls[CTL_CAPTURE_VOLUME];
else
return NULL;
if (! c->elem) {
c = &s->ctls[CTL_GLOBAL_VOLUME];
if (! c->elem)
return NULL;
}
if (c->type != SND_CTL_ELEM_TYPE_INTEGER)
return NULL;
return c;
}
static int get_dB_range(snd_hctl_elem_t *ctl, struct selem_str *rec,
long *min, long *max)
{
int step;
if (rec->db_init_error)
return -EINVAL;
if (! rec->db_initialized) {
if (init_db_range(ctl, rec) < 0)
return -EINVAL;
}
switch (rec->db_info[0]) {
case SND_CTL_TLVT_DB_SCALE:
*min = (int)rec->db_info[2];
step = (rec->db_info[3] & 0xffff);
*max = *min + (long)(step * (rec->max - rec->min));
return 0;
}
return -EINVAL;
}
static int get_dB_range_ops(snd_mixer_elem_t *elem, int dir,
long *min, long *max)
{
selem_none_t *s = snd_mixer_elem_get_private(elem);
selem_ctl_t *c;
int err;
c = get_selem_ctl(s, dir);
if (! c)
return -EINVAL;
return get_dB_range(c->elem, &s->str[dir], min, max);
}
static int get_dB_gain(snd_hctl_elem_t *ctl, struct selem_str *rec,
long volume, long *db_gain)
{
@ -1094,22 +1140,12 @@ static int get_dB_ops(snd_mixer_elem_t *elem,
{
selem_none_t *s = snd_mixer_elem_get_private(elem);
selem_ctl_t *c;
int err = -EINVAL;
int err;
long volume, db_gain;
if (dir == SM_PLAY)
c = &s->ctls[CTL_PLAYBACK_VOLUME];
else if (dir == SM_CAPT)
c = &s->ctls[CTL_CAPTURE_VOLUME];
else
goto _err;
if (! c->elem) {
c = &s->ctls[CTL_GLOBAL_VOLUME];
if (! c->elem)
goto _err;
}
if (c->type != SND_CTL_ELEM_TYPE_INTEGER)
goto _err;
c = get_selem_ctl(s, dir);
if (! c)
return -EINVAL;
if ((err = get_volume_ops(elem, dir, channel, &volume)) < 0)
goto _err;
if ((err = get_dB_gain(c->elem, &s->str[dir], volume, &db_gain)) < 0)