GstImplementsInterface

GstImplementsInterface — Core interface implemented by GstElements that allows runtime querying of interface availabillity

Synopsis




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);


Object Hierarchy


  GInterface
   +----GstImplementsInterface

Prerequisites

GstImplementsInterface requires GstElement.

Known Derived Interfaces

GstImplementsInterface is required by GstColorBalance, GstTuner, GstMixer and GstXOverlay.

Known Implementations

GstImplementsInterface is implemented by GstOssSink, GstV4lSrc, GstAlsaMixer, GstVolume, GstCACASink, GstV4lMjpegSink, GstV4lMjpegSrc, GstXImageSink, GstAlsaSrc, GstAlsaSink, GstXvImageSink, GstGLImageSink, GstSDLVideoSink, GstVideobalance, GstV4lElement, GstOssElement and GstOssSrc.

Description

Details

struct GstImplementsInterface

struct GstImplementsInterface;


GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_CAST()

#define     GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_CAST(obj, type, cast_t)

obj :
type :
cast_t :

GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_TYPE()

#define     GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_TYPE(obj, type)

obj :
type :

gst_element_implements_interface ()

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.

gst_implements_interface_cast ()

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

gst_implements_interface_check ()

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