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/*
* 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
enum
{
PROP_0,
PROP_MODE
};
#define DEFAULT_PROP_MODE GST_MIRROR_MODE_LEFT
#define gst_mirror_parent_class parent_class
G_DEFINE_TYPE (GstMirror, gst_mirror, GST_TYPE_GEOMETRIC_TRANSFORM);
#define GST_TYPE_MIRROR_MODE (gst_mirror_mode_get_type())
static GType
gst_mirror_mode_get_type (void)
{
static GType mode_type = 0;
static const GEnumValue modes[] = {
{GST_MIRROR_MODE_LEFT, "Split horizontally and reflect left into right",
"left"},
{GST_MIRROR_MODE_RIGHT, "Split horizontally and reflect right into left",
"right"},
{GST_MIRROR_MODE_TOP, "Split vertically and reflect top into bottom",
"top"},
{GST_MIRROR_MODE_BOTTOM, "Split vertically and reflect bottom into top",
"bottom"},
{0, NULL, NULL},
};
if (!mode_type) {
mode_type = g_enum_register_static ("GstMirrorMode", modes);
}
return mode_type;
}
static void
gst_mirror_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMirror *filter = GST_MIRROR_CAST (object);
switch (prop_id) {
case PROP_MODE:
GST_OBJECT_LOCK (filter);
filter->mode = g_value_get_enum (value);
GST_OBJECT_UNLOCK (filter);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mirror_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMirror *filter = GST_MIRROR_CAST (object);
switch (prop_id) {
case PROP_MODE:
g_value_set_enum (value, filter->mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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 - 1.0;
gdouble hh = gt->height / 2.0 - 1.0;
switch (mirror->mode) {
case GST_MIRROR_MODE_LEFT:
if (x > hw)
*in_x = gt->width - 1.0 - x;
else
*in_x = x;
*in_y = y;
break;
case GST_MIRROR_MODE_RIGHT:
if (x > hw)
*in_x = x;
else
*in_x = gt->width - 1.0 - x;
*in_y = y;
break;
case GST_MIRROR_MODE_TOP:
if (y > hh)
*in_y = gt->height - 1.0 - y;
else
*in_y = y;
*in_x = x;
break;
case GST_MIRROR_MODE_BOTTOM:
if (y > hh)
*in_y = y;
else
*in_y = gt->height - 1.0 - y;
*in_x = x;
break;
default:
g_assert_not_reached ();
}
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;
GstElementClass *gstelement_class;
GstGeometricTransformClass *gstgt_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstgt_class = (GstGeometricTransformClass *) klass;
gst_element_class_set_metadata (gstelement_class,
"mirror",
"Transform/Effect/Video",
"Split the image into two halves and reflect one over each other",
"Filippo Argiolas <filippo.argiolas@gmail.com>");
gobject_class->set_property = gst_mirror_set_property;
gobject_class->get_property = gst_mirror_get_property;
g_object_class_install_property (gobject_class, PROP_MODE,
g_param_spec_enum ("mode", "Mirror Mode",
"How to split the video frame and which side reflect",
GST_TYPE_MIRROR_MODE, DEFAULT_PROP_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
parent_class = g_type_class_peek_parent (klass);
gstgt_class->map_func = mirror_map;
}
static void
gst_mirror_init (GstMirror * filter)
{
GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter);
filter->mode = DEFAULT_PROP_MODE;
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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