| /* 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; |
| } |