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geometrictransform: new filter "mirror"
Ports gleffects "mirror" filter to geometrictransform. Simple yet effective mirror effect, splits the image into halves and reflect the first into the second. https://bugzilla.gnome.org/show_bug.cgi?id=625722
This commit is contained in:
Filippo Argiolas
Sebastian Dröge
parent
5c4915d917
commit
9ee12f94de
4 changed files with 219 additions and 2 deletions
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@ -15,7 +15,8 @@ libgstgeometrictransform_la_SOURCES = plugin.c \
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gststretch.c \
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gstbulge.c \
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gsttunnel.c \
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gstsquare.c
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gstsquare.c \
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gstmirror.c
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libgstgeometrictransform_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
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$(GST_PLUGINS_BASE_CFLAGS) \
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@ -43,4 +44,5 @@ noinst_HEADERS = gstgeometrictransform.h \
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gststretch.h \
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gstbulge.h \
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gsttunnel.h \
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gstsquare.h
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gstsquare.h \
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gstmirror.h
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128
gst/geometrictransform/gstmirror.c
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128
gst/geometrictransform/gstmirror.c
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@ -0,0 +1,128 @@
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/*
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* GStreamer
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* Copyright (C) 2010 Filippo Argiolas <filippo.argiolas@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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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 <gst/gst.h>
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#include <math.h>
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#include "gstmirror.h"
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GST_DEBUG_CATEGORY_STATIC (gst_mirror_debug);
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#define GST_CAT_DEFAULT gst_mirror_debug
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GST_BOILERPLATE (GstMirror, gst_mirror, GstGeometricTransform,
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GST_TYPE_GEOMETRIC_TRANSFORM);
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/* GObject vmethod implementations */
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static void
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gst_mirror_base_init (gpointer gclass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
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gst_element_class_set_details_simple (element_class,
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"mirror",
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"Transform/Effect/Video",
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"Split the image into two halves and reflect one over each other",
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"Filippo Argiolas <filippo.argiolas@gmail.com");
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}
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static gboolean
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mirror_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
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gdouble * in_y)
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{
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GstMirror *mirror = GST_MIRROR_CAST (gt);
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gdouble hw = gt->width / 2.0;
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/* possible parameters:
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- split horizontal/vertical
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- reflect left half into right half or viceversa
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- reflect top half into bottom half or viceversa
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*/
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if (x > hw)
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*in_x = gt->width - 1 - x;
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else
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*in_x = x;
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*in_y = y;
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GST_DEBUG_OBJECT (mirror, "Inversely mapped %d %d into %lf %lf",
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x, y, *in_x, *in_y);
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return TRUE;
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}
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static void
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gst_mirror_class_init (GstMirrorClass * klass)
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{
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GObjectClass *gobject_class;
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GstGeometricTransformClass *gstgt_class;
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gobject_class = (GObjectClass *) klass;
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gstgt_class = (GstGeometricTransformClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gstgt_class->map_func = mirror_map;
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}
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static void
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gst_mirror_init (GstMirror * filter, GstMirrorClass * gclass)
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{
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GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter);
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gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP;
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}
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gboolean
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gst_mirror_plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (gst_mirror_debug, "mirror", 0, "mirror");
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return gst_element_register (plugin, "mirror", GST_RANK_NONE,
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GST_TYPE_MIRROR);
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}
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83
gst/geometrictransform/gstmirror.h
Normal file
83
gst/geometrictransform/gstmirror.h
Normal file
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@ -0,0 +1,83 @@
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/*
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* GStreamer
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* Copyright (C) 2010 Filippo Argiolas <filippo.argiolas@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
|
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* which case the following provisions apply instead of the ones
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* mentioned above:
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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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#ifndef __GST_MIRROR_H__
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#define __GST_MIRROR_H__
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#include <gst/gst.h>
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#include "gstgeometrictransform.h"
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#include "geometricmath.h"
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G_BEGIN_DECLS
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/* #defines don't like whitespacey bits */
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#define GST_TYPE_MIRROR \
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(gst_mirror_get_type())
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#define GST_MIRROR(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MIRROR,GstMirror))
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#define GST_MIRROR_CAST(obj) \
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((GstMirror *)(obj))
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#define GST_MIRROR_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MIRROR,GstMirrorClass))
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#define GST_IS_MIRROR(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MIRROR))
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#define GST_IS_MIRROR_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MIRROR))
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typedef struct _GstMirror GstMirror;
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typedef struct _GstMirrorClass GstMirrorClass;
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struct _GstMirror
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{
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GstGeometricTransform element;
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};
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struct _GstMirrorClass
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{
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GstGeometricTransformClass parent_class;
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};
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GType gst_mirror_get_type (void);
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gboolean gst_mirror_plugin_init (GstPlugin * plugin);
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G_END_DECLS
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#endif /* __GST_MIRROR_H__ */
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@ -33,6 +33,7 @@
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#include "gstbulge.h"
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#include "gsttunnel.h"
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#include "gstsquare.h"
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#include "gstmirror.h"
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static gboolean
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plugin_init (GstPlugin * plugin)
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@ -73,6 +74,9 @@ plugin_init (GstPlugin * plugin)
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if (!gst_square_plugin_init (plugin))
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return FALSE;
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if (!gst_mirror_plugin_init (plugin))
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return FALSE;
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return TRUE;
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}
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