mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-05 07:56:35 +00:00
227 lines
6.5 KiB
C
227 lines
6.5 KiB
C
/* 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "videoorientation.h"
|
|
|
|
#include <string.h>
|
|
|
|
/**
|
|
* SECTION:gstvideoorientation
|
|
* @title: 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.
|
|
*/
|
|
|
|
/* FIXME 0.11: check if we need to add API for sometimes-supportedness
|
|
* (aka making up for GstImplementsInterface removal) (probably yes) */
|
|
|
|
G_DEFINE_INTERFACE (GstVideoOrientation, gst_video_orientation, 0)
|
|
static void
|
|
gst_video_orientation_default_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: (out): return location for the result
|
|
*
|
|
* Get the horizontal flipping state (%TRUE for flipped) from the given object.
|
|
* 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_INTERFACE (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: (out): return location for the result
|
|
*
|
|
* Get the vertical flipping state (%TRUE for flipped) from the given object.
|
|
* 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_INTERFACE (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: (out): return location for the result
|
|
*
|
|
* Get the horizontal centering offset from the given object.
|
|
* 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_INTERFACE (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: (out): return location for the result
|
|
*
|
|
* Get the vertical centering offset from the given object.
|
|
* 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_INTERFACE (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.
|
|
* 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_INTERFACE (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.
|
|
* 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_INTERFACE (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.
|
|
* 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_INTERFACE (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.
|
|
* 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_INTERFACE (video_orientation);
|
|
|
|
if (iface->set_vcenter) {
|
|
return iface->set_vcenter (video_orientation, center);
|
|
}
|
|
return FALSE;
|
|
}
|