|  |  |  | GStreamer Base Plugins 1.0 Library Reference Manual |  | 
|---|---|---|---|---|
| Top | Description | Object Hierarchy | ||||
GObject +----GInitiallyUnowned +----GstObject +----GstElement +----GstBaseTransform +----GstVideoFilter
Provides useful functions and a base class for video filters.
The videofilter will by default enable QoS on the parent GstBaseTransform to implement frame dropping.
struct GstVideoFilterClass {
  GstBaseTransformClass parent_class;
  gboolean      (*set_info)           (GstVideoFilter *filter,
                                       GstCaps *incaps, GstVideoInfo *in_info,
                                       GstCaps *outcaps, GstVideoInfo *out_info);
  /* transform */
  GstFlowReturn (*transform_frame)    (GstVideoFilter *filter,
                                       GstVideoFrame *inframe, GstVideoFrame *outframe);
  GstFlowReturn (*transform_frame_ip) (GstVideoFilter *trans, GstVideoFrame *frame);
};
The video filter class structure.
| GstBaseTransformClass  | the parent class structure | 
| function to be called with the negotiated caps and video infos | |
| transform a video frame | |
| transform a video frame in place |