gstvideoorientation: GStreamer Base Plugins 1.0 Library Reference Manual

gstvideoorientation

gstvideoorientation — Interface for elements providing video orientation controls

Functions

gboolean	gst_video_orientation_get_hcenter ()
gboolean	gst_video_orientation_get_hflip ()
gboolean	gst_video_orientation_get_vcenter ()
gboolean	gst_video_orientation_get_vflip ()
gboolean	gst_video_orientation_set_hcenter ()
gboolean	gst_video_orientation_set_hflip ()
gboolean	gst_video_orientation_set_vcenter ()
gboolean	gst_video_orientation_set_vflip ()

Types and Values

	GstVideoOrientation
struct	GstVideoOrientationInterface

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