gst.type_find_factory

Module for [TypeFindFactory] class

class TypeFindFactory TypeFindFactoryGidBuilder TypeFindFactoryGidBuilderImpl

Types 3

classTypeFindFactory : gst.plugin_feature.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;
 };

Methods
GType _getGType()
GType _gType() @property
TypeFindFactory self()Returns `this`, for use in `with` statements.
TypeFindFactoryGidBuilder builder()Get builder for [gst.typefindfactory.TypeFindFactory] Returns: New builder object
gst.type_find_factory.TypeFindFactory[] getList()Gets the list of all registered typefind factories. You must free the list using [gst.plugin_feature.PluginFeature.listFree].
void callFunction(gst.type_find.TypeFind find)Calls the #GstTypeFindFunction associated with this factory.
gst.caps.Caps getCaps()Gets the #GstCaps associated with a typefind factory. Returns: the #GstCaps associated with this factory
string[] getExtensions()Gets the extensions associated with a #GstTypeFindFactory. The returned array should not be changed. If you need to change stuff in it, you should copy it using [glib.global.strdupv]. This functio...
bool hasFunction()Check whether the factory has a typefind function. Typefind factories without typefind functions are a last-effort fallback mechanism to e.g. assume a certain media type based on the file extension...
Constructors
this(void * ptr, Flag!"Take" take)
classTypeFindFactoryGidBuilderImpl(T) : gst.plugin_feature.PluginFeatureGidBuilderImpl!T
classTypeFindFactoryGidBuilder : TypeFindFactoryGidBuilderImpl!TypeFindFactoryGidBuilder

Fluent builder for [gst.type_find_factory.TypeFindFactory]

Methods
TypeFindFactory build()