GStreamer Application Development Manual | ||
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while you can use the regular gtk_object_getv () function to query the value of an object property, GStreamer provides some easy wrappers for this common operation.
Instead of writing the following Gtk+ code to query the GTK_STRING value of an object:
GtkArg arg; guchar *value; arg.name = argname; gtk_object_getv (GTK_OBJECT (object), 1, &arg); value = GTK_VALUE_STRING (arg); |
You can also use:
value = gst_util_get_string_arg (object, argname); |
These convenience functions exist for the following types:
gint: with gst_util_get_int_arg ();
gboolean: with gst_util_get_bool_arg ();
glong: with gst_util_get_long_arg ();
gfloat: with gst_util_get_float_arg ();
gdouble: with gst_util_get_double_arg ();
guchar*: with gst_util_get_string_arg ();
gpointer: with gst_util_get_pointer_arg ();
GtkWidget*: with gst_util_get_widget_arg ();
There is also another utility function that can be used to dump a block of memory on the console. This function is very usefull for plugin developers. The function will dump size bytes of the memory pointed to by mem.
void gst_util_dump_mem(guchar *mem, guint size); |
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