gstvideoorientation

gstvideoorientation — Interface for elements providing video orientation controls

Synopsis

#include <gst/video/videoorientation.h>

                    GstVideoOrientation;
struct              GstVideoOrientationInterface;
gboolean            gst_video_orientation_get_hcenter   (GstVideoOrientation *video_orientation,
                                                         gint *center);
gboolean            gst_video_orientation_get_hflip     (GstVideoOrientation *video_orientation,
                                                         gboolean *flip);
gboolean            gst_video_orientation_get_vcenter   (GstVideoOrientation *video_orientation,
                                                         gint *center);
gboolean            gst_video_orientation_get_vflip     (GstVideoOrientation *video_orientation,
                                                         gboolean *flip);
gboolean            gst_video_orientation_set_hcenter   (GstVideoOrientation *video_orientation,
                                                         gint center);
gboolean            gst_video_orientation_set_hflip     (GstVideoOrientation *video_orientation,
                                                         gboolean flip);
gboolean            gst_video_orientation_set_vcenter   (GstVideoOrientation *video_orientation,
                                                         gint center);
gboolean            gst_video_orientation_set_vflip     (GstVideoOrientation *video_orientation,
                                                         gboolean flip);

Object Hierarchy

  GInterface
   +----GstVideoOrientation

Description

The interface allows unified access to control flipping and autocenter operation of video-sources or operators.

Details

GstVideoOrientation

typedef struct _GstVideoOrientation GstVideoOrientation;

Opaque GstVideoOrientation data structure.


struct GstVideoOrientationInterface

struct GstVideoOrientationInterface {
  GTypeInterface iface;

  /* FIXME 0.11: fix awkward API? add some kind of get_supported flags thing
   * and then just return booleans/int from all vfuncs requiring the caller
   * to check the flags first */

  /* virtual functions */
  gboolean (* get_hflip)   (GstVideoOrientation *video_orientation, gboolean *flip);
  gboolean (* get_vflip)   (GstVideoOrientation *video_orientation, gboolean *flip);
  gboolean (* get_hcenter) (GstVideoOrientation *video_orientation, gint *center);
  gboolean (* get_vcenter) (GstVideoOrientation *video_orientation, gint *center);

  gboolean (* set_hflip)   (GstVideoOrientation *video_orientation, gboolean flip);
  gboolean (* set_vflip)   (GstVideoOrientation *video_orientation, gboolean flip);
  gboolean (* set_hcenter) (GstVideoOrientation *video_orientation, gint center);
  gboolean (* set_vcenter) (GstVideoOrientation *video_orientation, gint center);
};

GstVideoOrientationInterface interface.

GTypeInterface iface;

parent interface type.

get_hflip ()

virtual method to get horizontal flipping state

get_vflip ()

virtual method to get vertical flipping state

get_hcenter ()

virtual method to get horizontal centering state

get_vcenter ()

virtual method to get vertical centering state

set_hflip ()

virtual method to set horizontal flipping state

set_vflip ()

virtual method to set vertical flipping state

set_hcenter ()

virtual method to set horizontal centering state

set_vcenter ()

virtual method to set vertical centering state

gst_video_orientation_get_hcenter ()

gboolean            gst_video_orientation_get_hcenter   (GstVideoOrientation *video_orientation,
                                                         gint *center);

Get the horizontal centering offset from the given object.

video_orientation :

GstVideoOrientation interface of a GstElement

center :

return location for the result

Returns :

TRUE in case the element supports centering

gst_video_orientation_get_hflip ()

gboolean            gst_video_orientation_get_hflip     (GstVideoOrientation *video_orientation,
                                                         gboolean *flip);

Get the horizontal flipping state (TRUE for flipped) from the given object.

video_orientation :

GstVideoOrientation interface of a GstElement

flip :

return location for the result

Returns :

TRUE in case the element supports flipping

gst_video_orientation_get_vcenter ()

gboolean            gst_video_orientation_get_vcenter   (GstVideoOrientation *video_orientation,
                                                         gint *center);

Get the vertical centering offset from the given object.

video_orientation :

GstVideoOrientation interface of a GstElement

center :

return location for the result

Returns :

TRUE in case the element supports centering

gst_video_orientation_get_vflip ()

gboolean            gst_video_orientation_get_vflip     (GstVideoOrientation *video_orientation,
                                                         gboolean *flip);

Get the vertical flipping state (TRUE for flipped) from the given object.

video_orientation :

GstVideoOrientation interface of a GstElement

flip :

return location for the result

Returns :

TRUE in case the element supports flipping

gst_video_orientation_set_hcenter ()

gboolean            gst_video_orientation_set_hcenter   (GstVideoOrientation *video_orientation,
                                                         gint center);

Set the horizontal centering offset for the given object.

video_orientation :

GstVideoOrientation interface of a GstElement

center :

centering offset

Returns :

TRUE in case the element supports centering

gst_video_orientation_set_hflip ()

gboolean            gst_video_orientation_set_hflip     (GstVideoOrientation *video_orientation,
                                                         gboolean flip);

Set the horizontal flipping state (TRUE for flipped) for the given object.

video_orientation :

GstVideoOrientation interface of a GstElement

flip :

use flipping

Returns :

TRUE in case the element supports flipping

gst_video_orientation_set_vcenter ()

gboolean            gst_video_orientation_set_vcenter   (GstVideoOrientation *video_orientation,
                                                         gint center);

Set the vertical centering offset for the given object.

video_orientation :

GstVideoOrientation interface of a GstElement

center :

centering offset

Returns :

TRUE in case the element supports centering

gst_video_orientation_set_vflip ()

gboolean            gst_video_orientation_set_vflip     (GstVideoOrientation *video_orientation,
                                                         gboolean flip);

Set the vertical flipping state (TRUE for flipped) for the given object.

video_orientation :

GstVideoOrientation interface of a GstElement

flip :

use flipping

Returns :

TRUE in case the element supports flipping