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/* GStreamer
* Copyright (C) 2006 Nokia <stefan.kost@nokia.com>
*
* videoorientation.c: video flipping and centering interface
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "videoorientation.h"
#include "interfaces-marshal.h"
#include <string.h>
/**
* SECTION:gstvideoorientation
* @short_description: Interface for elements providing video orientation
* controls
*
* The interface allows unified access to control flipping and autocenter
* operation of video-sources or operators.
*
* Since: 0.10.11
*/
static void gst_video_orientation_iface_init (GstVideoOrientationInterface *
iface);
GType
gst_video_orientation_get_type (void)
{
static GType gst_video_orientation_type = 0;
if (!gst_video_orientation_type) {
static const GTypeInfo gst_video_orientation_info = {
sizeof (GstVideoOrientationInterface),
(GBaseInitFunc) gst_video_orientation_iface_init,
NULL,
NULL,
NULL,
NULL,
0,
0,
NULL,
};
gst_video_orientation_type = g_type_register_static (G_TYPE_INTERFACE,
"GstVideoOrientation", &gst_video_orientation_info, 0);
g_type_interface_add_prerequisite (gst_video_orientation_type,
GST_TYPE_IMPLEMENTS_INTERFACE);
}
return gst_video_orientation_type;
}
static void
gst_video_orientation_iface_init (GstVideoOrientationInterface * iface)
{
/* default virtual functions */
iface->get_hflip = NULL;
iface->get_vflip = NULL;
iface->get_hcenter = NULL;
iface->get_vcenter = NULL;
iface->set_hflip = NULL;
iface->set_vflip = NULL;
iface->set_hcenter = NULL;
iface->set_vcenter = NULL;
}
/**
* gst_video_orientation_get_hflip:
* @video_orientation: #GstVideoOrientation interface of a #GstElement
* @flip: return location for the result
*
* Get the horizontal flipping state (%TRUE for flipped) from the given object.
*
* Since: 0.10.11
* Returns: %TRUE in case the element supports flipping
*/
gboolean
gst_video_orientation_get_hflip (GstVideoOrientation * video_orientation,
gboolean * flip)
{
GstVideoOrientationInterface *iface =
GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
if (iface->get_hflip) {
return iface->get_hflip (video_orientation, flip);
}
return FALSE;
}
/**
* gst_video_orientation_get_vflip:
* @video_orientation: #GstVideoOrientation interface of a #GstElement
* @flip: return location for the result
*
* Get the vertical flipping state (%TRUE for flipped) from the given object.
*
* Since: 0.10.11
* Returns: %TRUE in case the element supports flipping
*/
gboolean
gst_video_orientation_get_vflip (GstVideoOrientation * video_orientation,
gboolean * flip)
{
GstVideoOrientationInterface *iface =
GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
if (iface->get_vflip) {
return iface->get_vflip (video_orientation, flip);
}
return FALSE;
}
/**
* gst_video_orientation_get_hcenter:
* @video_orientation: #GstVideoOrientation interface of a #GstElement
* @center: return location for the result
*
* Get the horizontal centering offset from the given object.
*
* Since: 0.10.11
* Returns: %TRUE in case the element supports centering
*/
gboolean
gst_video_orientation_get_hcenter (GstVideoOrientation * video_orientation,
gint * center)
{
GstVideoOrientationInterface *iface =
GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
if (iface->get_hcenter) {
return iface->get_hcenter (video_orientation, center);
}
return FALSE;
}
/**
* gst_video_orientation_get_vcenter:
* @video_orientation: #GstVideoOrientation interface of a #GstElement
* @center: return location for the result
*
* Get the vertical centering offset from the given object.
*
* Since: 0.10.11
* Returns: %TRUE in case the element supports centering
*/
gboolean
gst_video_orientation_get_vcenter (GstVideoOrientation * video_orientation,
gint * center)
{
GstVideoOrientationInterface *iface =
GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
if (iface->get_vcenter) {
return iface->get_vcenter (video_orientation, center);
}
return FALSE;
}
/**
* gst_video_orientation_set_hflip:
* @video_orientation: #GstVideoOrientation interface of a #GstElement
* @flip: use flipping
*
* Set the horizontal flipping state (%TRUE for flipped) for the given object.
*
* Since: 0.10.11
* Returns: %TRUE in case the element supports flipping
*/
gboolean
gst_video_orientation_set_hflip (GstVideoOrientation * video_orientation,
gboolean flip)
{
GstVideoOrientationInterface *iface =
GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
if (iface->set_hflip) {
return iface->set_hflip (video_orientation, flip);
}
return FALSE;
}
/**
* gst_video_orientation_set_vflip:
* @video_orientation: #GstVideoOrientation interface of a #GstElement
* @flip: use flipping
*
* Set the vertical flipping state (%TRUE for flipped) for the given object.
*
* Since: 0.10.11
* Returns: %TRUE in case the element supports flipping
*/
gboolean
gst_video_orientation_set_vflip (GstVideoOrientation * video_orientation,
gboolean flip)
{
GstVideoOrientationInterface *iface =
GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
if (iface->set_vflip) {
return iface->set_vflip (video_orientation, flip);
}
return FALSE;
}
/**
* gst_video_orientation_set_hcenter:
* @video_orientation: #GstVideoOrientation interface of a #GstElement
* @center: centering offset
*
* Set the horizontal centering offset for the given object.
*
* Since: 0.10.11
* Returns: %TRUE in case the element supports centering
*/
gboolean
gst_video_orientation_set_hcenter (GstVideoOrientation * video_orientation,
gint center)
{
GstVideoOrientationInterface *iface =
GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
if (iface->set_hcenter) {
return iface->set_hcenter (video_orientation, center);
}
return FALSE;
}
/**
* gst_video_orientation_set_vcenter:
* @video_orientation: #GstVideoOrientation interface of a #GstElement
* @center: centering offset
*
* Set the vertical centering offset for the given object.
*
* Since: 0.10.11
* Returns: %TRUE in case the element supports centering
*/
gboolean
gst_video_orientation_set_vcenter (GstVideoOrientation * video_orientation,
gint center)
{
GstVideoOrientationInterface *iface =
GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
if (iface->set_vcenter) {
return iface->set_vcenter (video_orientation, center);
}
return FALSE;
}
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