static void change_enum_relative(struct control *control, int delta)
{
int items;
unsigned int i;
unsigned int index;
int new_index;
int err;
items = snd_mixer_selem_get_enum_items(control->elem);
if (items < 1)
return;
err = snd_mixer_selem_get_enum_item(control->elem, 0, &index);
if (err < 0)
return;
new_index = (int)index + delta;
if (new_index < 0)
new_index = 0;
else if (new_index >= items)
new_index = items - 1;
if (new_index == index)
return;
for (i = 0; i <= SND_MIXER_SCHN_LAST; ++i)
if (control->enum_channel_bits & (1 << i))
snd_mixer_selem_set_enum_item(control->elem, i, new_index);
}
static void change_enum_to_percent(struct control *control, int value)
{
unsigned int i;
unsigned int index;
unsigned int new_index;
int items;
int err;
i = ffs(control->enum_channel_bits) - 1;
err = snd_mixer_selem_get_enum_item(control->elem, i, &index);
if (err < 0)
return;
new_index = index;
if (value == 0) {
new_index = 0;
} else if (value == 100) {
items = snd_mixer_selem_get_enum_items(control->elem);
if (items < 1)
return;
new_index = items - 1;
}
if (new_index == index)
return;
for (i = 0; i <= SND_MIXER_SCHN_LAST; ++i)
if (control->enum_channel_bits & (1 << i))
snd_mixer_selem_set_enum_item(control->elem, i, new_index);
}
void lamixer_enumbox_show(EnumBox *enumbox, GtkWidget *enumvbox)
{
guint evalue;
snd_mixer_selem_get_enum_item(enumbox->volelem, SND_MIXER_SCHN_FRONT_LEFT, &evalue);
gtk_combo_box_set_active(GTK_COMBO_BOX(enumbox->enumswitch), evalue);
gtk_box_pack_start(GTK_BOX(enumvbox), enumbox->enumhbox, TRUE, FALSE, 0);
g_signal_connect(G_OBJECT(enumbox->enumswitch), "changed", G_CALLBACK(lamixer_enumbox_changed), enumbox->volelem);
snd_mixer_elem_set_callback(enumbox->volelem, lamixer_enumbox_change);
snd_mixer_elem_set_callback_private(enumbox->volelem, enumbox);
}
int alsactl_get_enum(void* handle, char* name, char** result)
{
snd_mixer_elem_t* elem = alsactl_find_selem(handle, name);
if (! elem)
return 1;
unsigned int val;
*result = (char*) malloc(32);
snd_mixer_selem_get_enum_item(elem, SND_MIXER_SCHN_FRONT_LEFT, &val);
snd_mixer_selem_get_enum_item_name(elem, val, 32, *result);
return 0;
}
const gchar *
gst_alsa_mixer_get_option (GstAlsaMixer * mixer, GstMixerOptions * opts)
{
gint ret;
guint idx;
GstAlsaMixerOptions *alsa_opts = GST_ALSA_MIXER_OPTIONS (opts);
g_return_val_if_fail (mixer->handle != NULL, NULL);
ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx);
if (ret == 0)
return g_list_nth_data (opts->values, idx);
else
return snd_strerror (ret); /* feeble attempt at error handling */
}
static int lamixer_enumbox_change(snd_mixer_elem_t *elem, unsigned int mask)
{
if (mask == SND_CTL_EVENT_MASK_REMOVE)
return 0;
if (mask & SND_CTL_EVENT_MASK_VALUE) {
guint evalue;
EnumBox *enmbox = NULL;
enmbox = snd_mixer_elem_get_callback_private(elem);
snd_mixer_selem_get_enum_item(elem, SND_MIXER_SCHN_FRONT_LEFT, &evalue);
gtk_combo_box_set_active(GTK_COMBO_BOX(enmbox->enumswitch), evalue);
}
return 0;
}
static void
gst_alsa_mixer_update_option (GstAlsaMixer * mixer,
GstAlsaMixerOptions * alsa_opts)
{
gint ret;
guint idx;
/* const */ gchar *option;
if (mixer->interface == NULL) {
GST_WARNING ("Cannot send update notifications, no GstMixer * given");
return;
}
ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx);
if (ret == 0) {
option = g_list_nth_data (GST_MIXER_OPTIONS (alsa_opts)->values, idx);
gst_mixer_option_changed (mixer->interface, GST_MIXER_OPTIONS (alsa_opts),
option);
}
}
/* Controls the alsamixer atributes of GCW device */
void mixer_control(int mode, long *volume, long *min, long *max)
{
snd_mixer_t *handle;
snd_mixer_selem_id_t *sid;
snd_mixer_elem_t *elem;
snd_mixer_selem_channel_id_t channel = SND_MIXER_SCHN_FRONT_LEFT;
snd_mixer_open(&handle, 0);
snd_mixer_attach(handle, "default");
snd_mixer_selem_register(handle, NULL, NULL);
snd_mixer_load(handle);
snd_mixer_selem_id_alloca(&sid);
snd_mixer_selem_id_set_index(sid, 0);
if (mode == VOLUME_GET || mode == VOLUME_SET) {
snd_mixer_selem_id_set_name(sid, "Headphone");
elem = snd_mixer_find_selem(handle, sid);
if (mode == VOLUME_GET) {
snd_mixer_selem_get_playback_volume(elem, channel, volume);
snd_mixer_selem_get_playback_volume_range(elem, min, max);
} else if (mode == VOLUME_SET) {
printf("GCW: Volume set to %ld\n", *volume);
snd_mixer_selem_set_playback_volume_all(elem, *volume);
}
/* adjust volume to Bypass too */
snd_mixer_selem_id_set_name(sid, "Line In Bypass");
elem = snd_mixer_find_selem(handle, sid);
if (mode == VOLUME_SET) {
printf("Line in Bypass: Volume set to %ld\n", *volume);
snd_mixer_selem_set_playback_volume_all(elem, *volume);
}
} else if (mode == HEADPHONE_TURN_ON || mode == HEADPHONE_TURN_OFF) {
snd_mixer_selem_id_set_name(sid, "Headphone Source");
elem = snd_mixer_find_selem(handle, sid);
if (mode == HEADPHONE_TURN_ON) {
printf("Headphone Source: Line In\n");
snd_mixer_selem_set_enum_item(elem, channel, 1);
} else if (mode == HEADPHONE_TURN_OFF) {
printf("Headphone Source: PCM\n");
snd_mixer_selem_set_enum_item(elem, channel, 0);
}
} else if (mode == SPEAKER_TURN_ON || mode == SPEAKER_TURN_OFF) {
snd_mixer_selem_id_set_name(sid, "Speakers");
elem = snd_mixer_find_selem(handle, sid);
if (mode == SPEAKER_TURN_ON) {
printf("Speaker turned on\n");
snd_mixer_selem_set_playback_switch_all(elem, 1);
} else if (mode == SPEAKER_TURN_OFF) {
printf("Speaker turned off\n");
snd_mixer_selem_set_playback_switch_all(elem, 0);
}
snd_mixer_selem_id_set_name(sid, "Line Out Source");
elem = snd_mixer_find_selem(handle, sid);
if (mode == SPEAKER_TURN_ON) {
printf("Line Out Source turned on\n");
snd_mixer_selem_set_enum_item(elem, channel, 1);
} else if (mode == SPEAKER_TURN_OFF) {
printf("Line Out Source turned off\n");
snd_mixer_selem_set_enum_item(elem, channel, 0);
}
} else if (mode == BYPASS_VERIFICATION) {
// volume here means that the radio is running in background or not
*volume = 0;
unsigned int setting = 0;
snd_mixer_selem_id_set_name(sid, "Headphone Source");
elem = snd_mixer_find_selem(handle, sid);
snd_mixer_selem_get_enum_item(elem, channel, &setting);
// the headphone is turned on
if (setting == 1) {
*volume = 1;
return;
}
snd_mixer_selem_id_set_name(sid, "Line Out Source");
elem = snd_mixer_find_selem(handle, sid);
snd_mixer_selem_get_enum_item(elem, channel, &setting);
// if both headphone and speakers are off, return 0 in volume to tell the screen that we need
// to setup the radio
*volume = setting == 1;
}
}
