static gboolean
gst_audio_mixer_filter_check_element (GstElement * element)
{
GstStateChangeReturn ret;
/* open device (only then we can know for sure whether it is a mixer) */
gst_element_set_state (element, GST_STATE_READY);
ret = gst_element_get_state (element, NULL, NULL, 1 * GST_SECOND);
if (ret != GST_STATE_CHANGE_SUCCESS) {
GST_DEBUG ("could not open device / set element to READY");
gst_element_set_state (element, GST_STATE_NULL);
return FALSE;
}
/* is this device a mixer? */
if (!GST_IS_MIXER (element)) {
GST_DEBUG ("element is not a mixer");
gst_element_set_state (element, GST_STATE_NULL);
return FALSE;
}
/* any tracks? */
if (!gst_mixer_list_tracks (GST_MIXER (element))) {
GST_DEBUG ("element is a mixer, but has no tracks");
gst_element_set_state (element, GST_STATE_NULL);
return FALSE;
}
GST_DEBUG ("element is a mixer with mixer tracks");
return TRUE;
}
static void
_xfce_mixer_card_combo_set_active_card (XfceMixerCardCombo *combo,
GstElement *card)
{
GstElement *current_card = NULL;
GtkTreeIter iter;
gboolean valid_iter;
g_return_if_fail (IS_XFCE_MIXER_CARD_COMBO (combo));
if (G_LIKELY (GST_IS_MIXER (card)))
{
valid_iter = gtk_tree_model_get_iter_first (GTK_TREE_MODEL (combo->list_store), &iter);
while (valid_iter)
{
gtk_tree_model_get (GTK_TREE_MODEL (combo->list_store), &iter, CARD_COLUMN, ¤t_card, -1);
if (G_UNLIKELY (current_card == card))
break;
valid_iter = gtk_tree_model_iter_next (GTK_TREE_MODEL (combo->list_store), &iter);
}
}
if (G_LIKELY (card != NULL && current_card == card))
gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo), &iter);
else
gtk_combo_box_set_active (GTK_COMBO_BOX (combo), 0);
}
void
xfce_mixer_track_combo_set_soundcard (XfceMixerTrackCombo *combo,
GstElement *card)
{
XfceMixerTrackType type;
GtkTreeIter tree_iter;
const GList *iter;
GList *cards;
gchar *label;
gint counter;
gint active_index = 0;
g_return_if_fail (IS_XFCE_MIXER_TRACK_COMBO (combo));
/* Remember card. If the card is invalid, use the first one available */
if (GST_IS_MIXER (card))
combo->card = card;
else
{
cards = xfce_mixer_get_cards ();
if (G_LIKELY (g_list_length (cards) > 0))
combo->card = g_list_first (cards)->data;
}
/* Clear the list store data */
gtk_list_store_clear (combo->list_store);
for (iter = gst_mixer_list_tracks (GST_MIXER (combo->card)), counter = 0; iter != NULL; iter = g_list_next (iter))
{
type = xfce_mixer_track_type_new (iter->data);
if (type == XFCE_MIXER_TRACK_TYPE_PLAYBACK || type == XFCE_MIXER_TRACK_TYPE_CAPTURE)
{
g_object_get (GST_MIXER_TRACK (iter->data), "label", &label, NULL);
gtk_list_store_append (combo->list_store, &tree_iter);
gtk_list_store_set (combo->list_store, &tree_iter,
NAME_COLUMN, label,
TRACK_COLUMN, GST_MIXER_TRACK (iter->data), -1);
g_free (label);
if (G_UNLIKELY (combo->track != NULL && combo->track == GST_MIXER_TRACK (iter->data)))
active_index = counter;
++counter;
}
}
gtk_combo_box_set_active (GTK_COMBO_BOX (combo), active_index);
}
GtkWidget*
xfce_mixer_option_new (GstElement *card,
GstMixerTrack *track)
{
XfceMixerOption *option;
g_return_val_if_fail (GST_IS_MIXER (card), NULL);
g_return_val_if_fail (GST_IS_MIXER_TRACK (track), NULL);
option = g_object_new (TYPE_XFCE_MIXER_OPTION, NULL);
option->card = card;
option->track = track;
xfce_mixer_option_create_contents (option);
return GTK_WIDGET (option);
}
GtkWidget *
mate_volume_control_preferences_new (GstElement *element)
{
MateVolumeControlPreferences *prefs;
g_return_val_if_fail (GST_IS_MIXER (element), NULL);
/* element */
prefs = g_object_new (MATE_VOLUME_CONTROL_TYPE_PREFERENCES, NULL);
prefs->settings = g_settings_new (MATE_VOLUME_CONTROL_SCHEMA);
mate_volume_control_preferences_change (prefs, element);
/* gsettings */
g_signal_connect (prefs->settings, "changed::" MATE_VOLUME_CONTROL_KEY_SHOWN_ELEMENTS,
G_CALLBACK (cb_gsettings), prefs);
return GTK_WIDGET (prefs);
}
void
mate_volume_control_preferences_change (MateVolumeControlPreferences *prefs,
GstElement *element)
{
GstMixer *mixer;
GtkTreeIter iter;
GtkListStore *store;
const GList *item;
gint pgnum;
g_return_if_fail (GST_IS_MIXER (element));
mixer = GST_MIXER (element);
store = GTK_LIST_STORE (gtk_tree_view_get_model (GTK_TREE_VIEW (prefs->treeview)));
/* remove old */
while (gtk_tree_model_get_iter_first (GTK_TREE_MODEL (store), &iter)) {
gtk_list_store_remove (store, &iter);
}
/* take/put reference */
gst_object_replace ((GstObject **) &prefs->mixer, GST_OBJECT (element));
/* add all tracks */
mate_volume_control_element_whitelist (mixer, NULL);
for (item = gst_mixer_list_tracks (mixer);
item != NULL; item = item->next) {
GstMixerTrack *track = item->data;
gboolean active = mate_volume_control_element_is_to_show (prefs->settings, mixer, track);
pgnum = get_page_num (mixer, track);
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter,
COL_ACTIVE, active,
COL_LABEL, track->label,
COL_TRACK, track,
COL_TYPE, get_page_description (pgnum),
COL_PAGE, pgnum,
-1);
}
}