GStreamer 0.8 Core Reference Manual |
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GstImplementsInterface — Core interface implemented by GstElements that allows runtime querying of interface availabillity
#include <gst/gst.h> struct GstImplementsInterface; #define GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_CAST(obj, type, cast_t) #define GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_TYPE(obj, type) gboolean gst_element_implements_interface (GstElement *element, GType iface_type); gpointer gst_implements_interface_cast (gpointer from, GType type); gboolean gst_implements_interface_check (gpointer from, GType type);
#define GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_CAST(obj, type, cast_t)
obj : | |
type : | |
cast_t : |
#define GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_TYPE(obj, type)
obj : | |
type : |
gboolean gst_element_implements_interface (GstElement *element, GType iface_type);
Test whether the given element implements a certain interface of type iface_type, and test whether it is supported for this specific instance.
element : | GstElement to check for the implementation of the interface |
iface_type : | (final) type of the interface which we want to be implemented |
Returns : | whether or not the element implements the interface. |
gpointer gst_implements_interface_cast (gpointer from, GType type);
cast a given object to an interface type, and check whether this interface is supported for this specific instance.
from : | the object (any sort) from which to cast to the interface |
type : | the interface type to cast to |
Returns : | a gpointer to the interface type |
gboolean gst_implements_interface_check (gpointer from, GType type);
check a given object for an interface implementation, and check whether this interface is supported for this specific instance.
from : | the object (any sort) from which to check from for the interface |
type : | the interface type to check for |
Returns : | whether or not the object implements the given interface |
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