Package org.freedesktop.gstreamer.gst

Class TypeFindFactory

java.lang.Object
org.javagi.base.ProxyInstance
org.gnome.gobject.TypeInstance
org.gnome.gobject.GObject
org.gnome.gobject.InitiallyUnowned
org.freedesktop.gstreamer.gst.GstObject
org.freedesktop.gstreamer.gst.PluginFeature
org.freedesktop.gstreamer.gst.TypeFindFactory
All Implemented Interfaces:
Proxy
@Generated("io.github.jwharm.JavaGI") public class TypeFindFactory extends PluginFeature
These functions allow querying information about registered typefind functions. How to create and register these functions is described in the section <link linkend="gstreamer-Writing-typefind-functions"> "Writing typefind functions"</link>.

The following example shows how to write a very simple typefinder that identifies the given data. You can get quite a bit more complicated than that though. 

  typedef struct {
     guint8 *data;
     guint size;
     guint probability;
     GstCaps *data;
   } MyTypeFind;
   static void
   my_peek (gpointer data, gint64 offset, guint size)
   {
     MyTypeFind *find = (MyTypeFind *) data;
     if (offset >= 0 && offset + size <= find->size) {
       return find->data + offset;
     }
     return NULL;
   }
   static void
   my_suggest (gpointer data, guint probability, GstCaps *caps)
   {
     MyTypeFind *find = (MyTypeFind *) data;
     if (probability > find->probability) {
       find->probability = probability;
       gst_caps_replace (&find->caps, caps);
     }
   }
   static GstCaps *
   find_type (guint8 *data, guint size)
   {
     GList *walk, *type_list;
     MyTypeFind find = {data, size, 0, NULL};
     GstTypeFind gst_find = {my_peek, my_suggest, &find, };
     walk = type_list = gst_type_find_factory_get_list ();
     while (walk) {
       GstTypeFindFactory *factory = GST_TYPE_FIND_FACTORY (walk->data);
       walk = g_list_next (walk)
       gst_type_find_factory_call_function (factory, &gst_find);
     }
     g_list_free (type_list);
     return find.caps;
   };