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GstVideoOrientation

GstVideoOrientation — Interface for elements providing video orientation controls

Object Hierarchy

    GInterface
    ╰── GstVideoOrientation

Includes

#include <gst/video/videoorientation.h>

Description

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

Functions

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.

Parameters

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.

Parameters

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.

Parameters

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.

Parameters

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.

Parameters

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.

Parameters

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.

Parameters

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.

Parameters

video_orientation

GstVideoOrientation interface of a GstElement

 

flip

use flipping

 

Returns

TRUE in case the element supports flipping

Types and Values

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.

Members

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

 
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