mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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271 lines
7.1 KiB
C
271 lines
7.1 KiB
C
/* GStreamer
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* Copyright (C) 2006 Nokia <stefan.kost@nokia.com>
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*
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* videoorientation.c: video flipping and centering interface
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "videoorientation.h"
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#include "interfaces-marshal.h"
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#include <string.h>
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/**
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* SECTION:gstvideoorientation
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* @short_description: Interface for elements providing video orientation
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* controls
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*
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* The interface allows unified access to control flipping and autocenter
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* operation of video-sources or operators.
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*
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* Since: 0.10.11
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*/
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/* FIXME 0.11: check if we need to add API for sometimes-supportedness
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* (aka making up for GstImplementsInterface removal) (probably yes) */
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static void gst_video_orientation_iface_init (GstVideoOrientationInterface *
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iface);
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GType
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gst_video_orientation_get_type (void)
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{
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static GType gst_video_orientation_type = 0;
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if (!gst_video_orientation_type) {
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static const GTypeInfo gst_video_orientation_info = {
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sizeof (GstVideoOrientationInterface),
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(GBaseInitFunc) gst_video_orientation_iface_init,
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NULL,
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NULL,
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NULL,
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NULL,
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0,
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0,
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NULL,
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};
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gst_video_orientation_type = g_type_register_static (G_TYPE_INTERFACE,
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"GstVideoOrientation", &gst_video_orientation_info, 0);
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}
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return gst_video_orientation_type;
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}
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static void
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gst_video_orientation_iface_init (GstVideoOrientationInterface * iface)
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{
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/* default virtual functions */
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iface->get_hflip = NULL;
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iface->get_vflip = NULL;
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iface->get_hcenter = NULL;
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iface->get_vcenter = NULL;
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iface->set_hflip = NULL;
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iface->set_vflip = NULL;
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iface->set_hcenter = NULL;
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iface->set_vcenter = NULL;
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}
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/**
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* gst_video_orientation_get_hflip:
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* @video_orientation: #GstVideoOrientation interface of a #GstElement
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* @flip: return location for the result
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*
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* Get the horizontal flipping state (%TRUE for flipped) from the given object.
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*
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* Since: 0.10.11
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* Returns: %TRUE in case the element supports flipping
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*/
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gboolean
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gst_video_orientation_get_hflip (GstVideoOrientation * video_orientation,
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gboolean * flip)
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{
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GstVideoOrientationInterface *iface =
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GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
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if (iface->get_hflip) {
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return iface->get_hflip (video_orientation, flip);
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}
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return FALSE;
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}
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/**
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* gst_video_orientation_get_vflip:
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* @video_orientation: #GstVideoOrientation interface of a #GstElement
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* @flip: return location for the result
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*
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* Get the vertical flipping state (%TRUE for flipped) from the given object.
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*
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* Since: 0.10.11
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* Returns: %TRUE in case the element supports flipping
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*/
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gboolean
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gst_video_orientation_get_vflip (GstVideoOrientation * video_orientation,
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gboolean * flip)
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{
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GstVideoOrientationInterface *iface =
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GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
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if (iface->get_vflip) {
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return iface->get_vflip (video_orientation, flip);
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}
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return FALSE;
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}
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/**
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* gst_video_orientation_get_hcenter:
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* @video_orientation: #GstVideoOrientation interface of a #GstElement
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* @center: return location for the result
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*
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* Get the horizontal centering offset from the given object.
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*
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* Since: 0.10.11
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* Returns: %TRUE in case the element supports centering
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*/
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gboolean
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gst_video_orientation_get_hcenter (GstVideoOrientation * video_orientation,
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gint * center)
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{
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GstVideoOrientationInterface *iface =
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GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
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if (iface->get_hcenter) {
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return iface->get_hcenter (video_orientation, center);
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}
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return FALSE;
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}
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/**
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* gst_video_orientation_get_vcenter:
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* @video_orientation: #GstVideoOrientation interface of a #GstElement
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* @center: return location for the result
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*
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* Get the vertical centering offset from the given object.
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*
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* Since: 0.10.11
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* Returns: %TRUE in case the element supports centering
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*/
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gboolean
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gst_video_orientation_get_vcenter (GstVideoOrientation * video_orientation,
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gint * center)
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{
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GstVideoOrientationInterface *iface =
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GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
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if (iface->get_vcenter) {
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return iface->get_vcenter (video_orientation, center);
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}
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return FALSE;
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}
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/**
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* gst_video_orientation_set_hflip:
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* @video_orientation: #GstVideoOrientation interface of a #GstElement
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* @flip: use flipping
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*
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* Set the horizontal flipping state (%TRUE for flipped) for the given object.
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*
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* Since: 0.10.11
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* Returns: %TRUE in case the element supports flipping
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*/
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gboolean
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gst_video_orientation_set_hflip (GstVideoOrientation * video_orientation,
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gboolean flip)
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{
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GstVideoOrientationInterface *iface =
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GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
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if (iface->set_hflip) {
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return iface->set_hflip (video_orientation, flip);
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}
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return FALSE;
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}
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/**
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* gst_video_orientation_set_vflip:
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* @video_orientation: #GstVideoOrientation interface of a #GstElement
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* @flip: use flipping
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*
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* Set the vertical flipping state (%TRUE for flipped) for the given object.
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*
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* Since: 0.10.11
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* Returns: %TRUE in case the element supports flipping
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*/
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gboolean
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gst_video_orientation_set_vflip (GstVideoOrientation * video_orientation,
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gboolean flip)
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{
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GstVideoOrientationInterface *iface =
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GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
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if (iface->set_vflip) {
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return iface->set_vflip (video_orientation, flip);
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}
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return FALSE;
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}
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/**
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* gst_video_orientation_set_hcenter:
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* @video_orientation: #GstVideoOrientation interface of a #GstElement
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* @center: centering offset
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*
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* Set the horizontal centering offset for the given object.
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*
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* Since: 0.10.11
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* Returns: %TRUE in case the element supports centering
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*/
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gboolean
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gst_video_orientation_set_hcenter (GstVideoOrientation * video_orientation,
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gint center)
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{
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GstVideoOrientationInterface *iface =
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GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
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if (iface->set_hcenter) {
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return iface->set_hcenter (video_orientation, center);
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}
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return FALSE;
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}
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/**
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* gst_video_orientation_set_vcenter:
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* @video_orientation: #GstVideoOrientation interface of a #GstElement
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* @center: centering offset
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*
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* Set the vertical centering offset for the given object.
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*
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* Since: 0.10.11
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* Returns: %TRUE in case the element supports centering
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*/
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gboolean
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gst_video_orientation_set_vcenter (GstVideoOrientation * video_orientation,
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gint center)
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{
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GstVideoOrientationInterface *iface =
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GST_VIDEO_ORIENTATION_GET_IFACE (video_orientation);
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if (iface->set_vcenter) {
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return iface->set_vcenter (video_orientation, center);
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}
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return FALSE;
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}
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