sys/oss/gstossmixerelement.c: Add 'device-name' property and fix state change function.

Original commit message from CVS:
* sys/oss/gstossmixerelement.c: (gst_oss_mixer_element_class_init),
(gst_oss_mixer_element_get_property),
(gst_oss_mixer_element_change_state):
Add 'device-name' property and fix state change function.

1 files changed, 51 insertions, 5 deletions

diff --git a/sys/oss/gstossmixerelement.c b/sys/oss/gstossmixerelement.c
index 9aeebcd4..01e7a3d9 100644
--- a/sys/oss/gstossmixerelement.c
+++ b/sys/oss/gstossmixerelement.c
@@ -27,6 +27,12 @@
 GST_DEBUG_CATEGORY_EXTERN (oss_debug);
 #define GST_CAT_DEFAULT oss_debug
 
+enum
+{
+  PROP_DEVICE_NAME = 1
+};
+
+
 static GstElementDetails gst_oss_mixer_element_details =
 GST_ELEMENT_DETAILS ("OSS Mixer",
     "Generic/Audio",
@@ -43,6 +49,9 @@ GST_IMPLEMENT_OSS_MIXER_METHODS (GstOssMixerElement, gst_oss_mixer_element);
 static GstStateChangeReturn gst_oss_mixer_element_change_state (GstElement *
     element, GstStateChange transition);
 
+static void gst_oss_mixer_element_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec);
+
 static void
 gst_oss_mixer_element_base_init (gpointer klass)
 {
@@ -54,10 +63,19 @@ static void
 gst_oss_mixer_element_class_init (GstOssMixerElementClass * klass)
 {
   GstElementClass *element_class;
+  GObjectClass *gobject_class;
 
   element_class = (GstElementClass *) klass;
+  gobject_class = (GObjectClass *) klass;
 
-  element_class->change_state = gst_oss_mixer_element_change_state;
+  gobject_class->get_property = gst_oss_mixer_element_get_property;
+
+  g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
+      g_param_spec_string ("device-name", "Device name",
+          "Human-readable name of the sound device", "", G_PARAM_READABLE));
+
+  element_class->change_state =
+      GST_DEBUG_FUNCPTR (gst_oss_mixer_element_change_state);
 }
 
 static void
@@ -67,10 +85,31 @@ gst_oss_mixer_element_init (GstOssMixerElement * this,
   this->mixer = NULL;
 }
 
+static void
+gst_oss_mixer_element_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstOssMixerElement *this = GST_OSS_MIXER_ELEMENT (object);
+
+  switch (prop_id) {
+    case PROP_DEVICE_NAME:
+      if (this->mixer) {
+        g_value_set_string (value, this->mixer->cardname);
+      } else {
+        g_value_set_string (value, NULL);
+      }
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
 static GstStateChangeReturn
 gst_oss_mixer_element_change_state (GstElement * element,
     GstStateChange transition)
 {
+  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
   GstOssMixerElement *this = GST_OSS_MIXER_ELEMENT (element);
 
   switch (transition) {
@@ -79,6 +118,16 @@ gst_oss_mixer_element_change_state (GstElement * element,
         this->mixer = gst_ossmixer_new ("/dev/mixer", GST_OSS_MIXER_ALL);
       }
       break;
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+  if (ret == GST_STATE_CHANGE_FAILURE)
+    return ret;
+
+  switch (transition) {
     case GST_STATE_CHANGE_READY_TO_NULL:
       if (this->mixer) {
         gst_ossmixer_free (this->mixer);
@@ -89,8 +138,5 @@ gst_oss_mixer_element_change_state (GstElement * element,
       break;
   }
 
-  if (GST_ELEMENT_CLASS (parent_class)->change_state)
-    return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
-
-  return GST_STATE_CHANGE_SUCCESS;
+  return ret;
 }