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ALSA: dummy: allow disabling mixer controls 

To make the testing of deactivated mixer controls easier (and for people
with common hardware, possible), add a control that deactivates some
other controls.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2012-10-20 12:21:36 +02:00
parent a0d271cbfe
commit 16e434670e
1 changed files with 71 additions and 2 deletions
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73
sound/drivers/dummy.c
View File

@ -134,6 +134,9 @@ struct snd_dummy {
spinlock_t mixer_lock;
int mixer_volume[MIXER_ADDR_LAST+1][2];
int capture_source[MIXER_ADDR_LAST+1][2];
int iobox;
struct snd_kcontrol *cd_volume_ctl;
struct snd_kcontrol *cd_switch_ctl;
const struct dummy_timer_ops *timer_ops;
};
@ -817,6 +820,57 @@ static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_el
return change;
}
static int snd_dummy_iobox_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *info)
{
const char *const names[] = { "None", "CD Player" };
return snd_ctl_enum_info(info, 1, 2, names);
}
static int snd_dummy_iobox_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *value)
{
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
value->value.enumerated.item[0] = dummy->iobox;
return 0;
}
static int snd_dummy_iobox_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *value)
{
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
int changed;
if (value->value.enumerated.item[0] > 1)
return -EINVAL;
changed = value->value.enumerated.item[0] != dummy->iobox;
if (changed) {
dummy->iobox = value->value.enumerated.item[0];
if (dummy->iobox) {
dummy->cd_volume_ctl->vd[0].access &=
~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
dummy->cd_switch_ctl->vd[0].access &=
~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
} else {
dummy->cd_volume_ctl->vd[0].access |=
SNDRV_CTL_ELEM_ACCESS_INACTIVE;
dummy->cd_switch_ctl->vd[0].access |=
SNDRV_CTL_ELEM_ACCESS_INACTIVE;
}
snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
&dummy->cd_volume_ctl->id);
snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
&dummy->cd_switch_ctl->id);
}
return changed;
}
static struct snd_kcontrol_new snd_dummy_controls[] = {
DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
@ -827,22 +881,37 @@ DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE),
DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC),
DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD)
DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD),
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "External I/O Box",
.info = snd_dummy_iobox_info,
.get = snd_dummy_iobox_get,
.put = snd_dummy_iobox_put,
},
};
static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy)
{
struct snd_card *card = dummy->card;
struct snd_kcontrol *kcontrol;
unsigned int idx;
int err;
spin_lock_init(&dummy->mixer_lock);
strcpy(card->mixername, "Dummy Mixer");
dummy->iobox = 1;
for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy));
kcontrol = snd_ctl_new1(&snd_dummy_controls[idx], dummy);
err = snd_ctl_add(card, kcontrol);
if (err < 0)
return err;
if (!strcmp(kcontrol->id.name, "CD Volume"))
dummy->cd_volume_ctl = kcontrol;
else if (!strcmp(kcontrol->id.name, "CD Capture Switch"))
dummy->cd_switch_ctl = kcontrol;
}
return 0;
}