mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
215 lines
6.4 KiB
C
215 lines
6.4 KiB
C
/*
|
|
* GStreamer
|
|
* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Thanks to Jerry Huxtable <http://www.jhlabs.com> work on its java
|
|
* image editor and filters. The algorithms here were extracted from
|
|
* his code.
|
|
*/
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <gst/gst.h>
|
|
#include <math.h>
|
|
|
|
#include "gstpinch.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_pinch_debug);
|
|
#define GST_CAT_DEFAULT gst_pinch_debug
|
|
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_INTENSITY
|
|
};
|
|
|
|
#define DEFAULT_INTENSITY 0.5
|
|
|
|
#define gst_pinch_parent_class parent_class
|
|
G_DEFINE_TYPE (GstPinch, gst_pinch, GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM);
|
|
|
|
static void
|
|
gst_pinch_set_property (GObject * object, guint prop_id, const GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstPinch *pinch;
|
|
GstGeometricTransform *gt;
|
|
gdouble v;
|
|
|
|
gt = GST_GEOMETRIC_TRANSFORM_CAST (object);
|
|
pinch = GST_PINCH_CAST (object);
|
|
|
|
GST_OBJECT_LOCK (gt);
|
|
switch (prop_id) {
|
|
case PROP_INTENSITY:
|
|
v = g_value_get_double (value);
|
|
if (v != pinch->intensity) {
|
|
pinch->intensity = v;
|
|
gst_geometric_transform_set_need_remap (gt);
|
|
}
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
GST_OBJECT_UNLOCK (gt);
|
|
}
|
|
|
|
static void
|
|
gst_pinch_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstPinch *pinch;
|
|
|
|
pinch = GST_PINCH_CAST (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_INTENSITY:
|
|
g_value_set_double (value, pinch->intensity);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Clean up */
|
|
static void
|
|
gst_pinch_finalize (GObject * obj)
|
|
{
|
|
G_OBJECT_CLASS (parent_class)->finalize (obj);
|
|
}
|
|
|
|
static gboolean
|
|
pinch_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
|
|
gdouble * in_y)
|
|
{
|
|
GstCircleGeometricTransform *cgt = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (gt);
|
|
GstPinch *pinch = GST_PINCH_CAST (gt);
|
|
gdouble distance;
|
|
gdouble dx, dy;
|
|
|
|
dx = x - cgt->precalc_x_center;
|
|
dy = y - cgt->precalc_y_center;
|
|
distance = dx * dx + dy * dy;
|
|
|
|
GST_LOG_OBJECT (pinch, "Center %0.5lf (%0.2lf) %0.5lf (%0.2lf)",
|
|
cgt->precalc_x_center, cgt->x_center, cgt->precalc_y_center,
|
|
cgt->y_center);
|
|
GST_LOG_OBJECT (pinch, "Input %d %d, distance=%lf, radius2=%lf, dx=%lf"
|
|
", dy=%lf", x, y, distance, cgt->precalc_radius2, dx, dy);
|
|
|
|
if (distance > cgt->precalc_radius2 || distance == 0) {
|
|
*in_x = x;
|
|
*in_y = y;
|
|
} else {
|
|
gdouble d = sqrt (distance / cgt->precalc_radius2);
|
|
gdouble t = pow (sin (G_PI * 0.5 * d), -pinch->intensity);
|
|
|
|
dx *= t;
|
|
dy *= t;
|
|
|
|
GST_LOG_OBJECT (pinch, "D=%lf, t=%lf, dx=%lf" ", dy=%lf", d, t, dx, dy);
|
|
|
|
*in_x = cgt->precalc_x_center + dx;
|
|
*in_y = cgt->precalc_y_center + dy;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (pinch, "Inversely mapped %d %d into %lf %lf",
|
|
x, y, *in_x, *in_y);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_pinch_class_init (GstPinchClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *gstelement_class;
|
|
GstGeometricTransformClass *gstgt_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
gstelement_class = (GstElementClass *) klass;
|
|
gstgt_class = (GstGeometricTransformClass *) klass;
|
|
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
|
|
gst_element_class_set_details_simple (gstelement_class,
|
|
"pinch",
|
|
"Transform/Effect/Video",
|
|
"Applies 'pinch' geometric transform to the image",
|
|
"Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
|
|
|
|
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_pinch_finalize);
|
|
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_pinch_set_property);
|
|
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_pinch_get_property);
|
|
|
|
|
|
g_object_class_install_property (gobject_class, PROP_INTENSITY,
|
|
g_param_spec_double ("intensity", "intensity",
|
|
"intensity of the pinch effect",
|
|
-1.0, 1.0, DEFAULT_INTENSITY,
|
|
GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
gstgt_class->map_func = pinch_map;
|
|
}
|
|
|
|
static void
|
|
gst_pinch_init (GstPinch * filter)
|
|
{
|
|
GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter);
|
|
|
|
gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP;
|
|
filter->intensity = DEFAULT_INTENSITY;
|
|
}
|
|
|
|
gboolean
|
|
gst_pinch_plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (gst_pinch_debug, "pinch", 0, "pinch");
|
|
|
|
return gst_element_register (plugin, "pinch", GST_RANK_NONE, GST_TYPE_PINCH);
|
|
}
|