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 2010-08-02 11:12:42 +02:00 committed by Sebastian Dröge
parent 5c4915d917
commit 9ee12f94de
4 changed files with 219 additions and 2 deletions

View file

@ -15,7 +15,8 @@ libgstgeometrictransform_la_SOURCES = plugin.c \
gststretch.c \
gstbulge.c \
gsttunnel.c \
gstsquare.c
gstsquare.c \
gstmirror.c
libgstgeometrictransform_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
$(GST_PLUGINS_BASE_CFLAGS) \
@ -43,4 +44,5 @@ noinst_HEADERS = gstgeometrictransform.h \
gststretch.h \
gstbulge.h \
gsttunnel.h \
gstsquare.h
gstsquare.h \
gstmirror.h

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@ -0,0 +1,128 @@
/*
* GStreamer
* Copyright (C) 2010 Filippo Argiolas <filippo.argiolas@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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 <gst/gst.h>
#include <math.h>
#include "gstmirror.h"
GST_DEBUG_CATEGORY_STATIC (gst_mirror_debug);
#define GST_CAT_DEFAULT gst_mirror_debug
GST_BOILERPLATE (GstMirror, gst_mirror, GstGeometricTransform,
GST_TYPE_GEOMETRIC_TRANSFORM);
/* GObject vmethod implementations */
static void
gst_mirror_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_details_simple (element_class,
"mirror",
"Transform/Effect/Video",
"Split the image into two halves and reflect one over each other",
"Filippo Argiolas <filippo.argiolas@gmail.com");
}
static gboolean
mirror_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
gdouble * in_y)
{
GstMirror *mirror = GST_MIRROR_CAST (gt);
gdouble hw = gt->width / 2.0;
/* possible parameters:
- split horizontal/vertical
- reflect left half into right half or viceversa
- reflect top half into bottom half or viceversa
*/
if (x > hw)
*in_x = gt->width - 1 - x;
else
*in_x = x;
*in_y = y;
GST_DEBUG_OBJECT (mirror, "Inversely mapped %d %d into %lf %lf",
x, y, *in_x, *in_y);
return TRUE;
}
static void
gst_mirror_class_init (GstMirrorClass * klass)
{
GObjectClass *gobject_class;
GstGeometricTransformClass *gstgt_class;
gobject_class = (GObjectClass *) klass;
gstgt_class = (GstGeometricTransformClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gstgt_class->map_func = mirror_map;
}
static void
gst_mirror_init (GstMirror * filter, GstMirrorClass * gclass)
{
GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter);
gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP;
}
gboolean
gst_mirror_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_mirror_debug, "mirror", 0, "mirror");
return gst_element_register (plugin, "mirror", GST_RANK_NONE,
GST_TYPE_MIRROR);
}

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@ -0,0 +1,83 @@
/*
* GStreamer
* Copyright (C) 2010 Filippo Argiolas <filippo.argiolas@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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.
*/
#ifndef __GST_MIRROR_H__
#define __GST_MIRROR_H__
#include <gst/gst.h>
#include "gstgeometrictransform.h"
#include "geometricmath.h"
G_BEGIN_DECLS
/* #defines don't like whitespacey bits */
#define GST_TYPE_MIRROR \
(gst_mirror_get_type())
#define GST_MIRROR(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MIRROR,GstMirror))
#define GST_MIRROR_CAST(obj) \
((GstMirror *)(obj))
#define GST_MIRROR_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MIRROR,GstMirrorClass))
#define GST_IS_MIRROR(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MIRROR))
#define GST_IS_MIRROR_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MIRROR))
typedef struct _GstMirror GstMirror;
typedef struct _GstMirrorClass GstMirrorClass;
struct _GstMirror
{
GstGeometricTransform element;
};
struct _GstMirrorClass
{
GstGeometricTransformClass parent_class;
};
GType gst_mirror_get_type (void);
gboolean gst_mirror_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_MIRROR_H__ */

View file

@ -33,6 +33,7 @@
#include "gstbulge.h"
#include "gsttunnel.h"
#include "gstsquare.h"
#include "gstmirror.h"
static gboolean
plugin_init (GstPlugin * plugin)
@ -73,6 +74,9 @@ plugin_init (GstPlugin * plugin)
if (!gst_square_plugin_init (plugin))
return FALSE;
if (!gst_mirror_plugin_init (plugin))
return FALSE;
return TRUE;
}