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diffuse: Adds diffuse element to geometrictransform
Adds the 'diffuse' element to geometrictransform. It moves the pixels of the image in random directions
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4 changed files with 316 additions and 0 deletions
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@ -5,6 +5,7 @@ libgstgeometrictransform_la_SOURCES = plugin.c \
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gstcirclegeometrictransform.c \
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geometricmath.c \
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gstcircle.c \
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gstdiffuse.c \
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gstkaleidoscope.c \
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gstpinch.c \
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gstsphere.c \
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@ -21,6 +22,7 @@ noinst_HEADERS = gstgeometrictransform.h \
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gstcirclegeometrictransform.h \
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geometricmath.h \
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gstcircle.h \
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gstdiffuse.h \
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gstkaleidoscope.h \
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gstpinch.h \
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gstsphere.h \
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220
gst/geometrictransform/gstdiffuse.c
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220
gst/geometrictransform/gstdiffuse.c
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@ -0,0 +1,220 @@
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/*
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* GStreamer
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* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
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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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/*
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* Thanks to Jerry Huxtable <http://www.jhlabs.com> work on its java
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* image editor and filters. The algorithms here were extracted from
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* his code.
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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 "gstdiffuse.h"
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GST_DEBUG_CATEGORY_STATIC (gst_diffuse_debug);
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#define GST_CAT_DEFAULT gst_diffuse_debug
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enum
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{
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PROP_0,
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PROP_SCALE
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};
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#define DEFAULT_SCALE 4
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GST_BOILERPLATE (GstDiffuse, gst_diffuse, GstGeometricTransform,
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GST_TYPE_GEOMETRIC_TRANSFORM);
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static void
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gst_diffuse_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstDiffuse *diffuse;
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diffuse = GST_DIFFUSE_CAST (object);
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switch (prop_id) {
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case PROP_SCALE:
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diffuse->scale = g_value_get_double (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_diffuse_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstDiffuse *diffuse;
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diffuse = GST_DIFFUSE_CAST (object);
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switch (prop_id) {
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case PROP_SCALE:
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g_value_set_double (value, diffuse->scale);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/* Clean up */
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static void
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gst_diffuse_finalize (GObject * obj)
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{
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GstDiffuse *diffuse = GST_DIFFUSE_CAST (obj);
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g_free (diffuse->sin_table);
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g_free (diffuse->cos_table);
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G_OBJECT_CLASS (parent_class)->finalize (obj);
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}
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/* GObject vmethod implementations */
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static void
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gst_diffuse_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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"diffuse",
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"Transform/Effect/Video",
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"Diffuses the image by moving its pixels in random directions",
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"Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
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}
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static gboolean
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diffuse_prepare (GstGeometricTransform * trans)
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{
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GstDiffuse *diffuse = GST_DIFFUSE_CAST (trans);
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gint i;
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if (diffuse->sin_table)
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return TRUE;
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diffuse->sin_table = g_malloc0 (sizeof (gdouble) * 256);
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diffuse->cos_table = g_malloc0 (sizeof (gdouble) * 256);
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for (i = 0; i < 256; i++) {
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gdouble angle = (G_PI * 2 * i) / 256.0;
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diffuse->sin_table[i] = diffuse->scale * sin (angle);
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diffuse->cos_table[i] = diffuse->scale * cos (angle);
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}
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return TRUE;
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}
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static gboolean
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diffuse_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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GstDiffuse *diffuse = GST_DIFFUSE_CAST (gt);
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gint angle;
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gdouble distance;
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angle = g_random_int_range (0, 256);
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distance = g_random_double ();
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*in_x = x + distance * diffuse->sin_table[angle];
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*in_y = y + distance * diffuse->cos_table[angle];
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GST_DEBUG_OBJECT (diffuse, "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_diffuse_class_init (GstDiffuseClass * 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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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_diffuse_finalize);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_diffuse_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_diffuse_get_property);
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g_object_class_install_property (gobject_class, PROP_SCALE,
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g_param_spec_double ("scale", "scale",
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"Scale of the texture",
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1, G_MAXDOUBLE, DEFAULT_SCALE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstgt_class->prepare_func = diffuse_prepare;
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gstgt_class->map_func = diffuse_map;
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}
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static void
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gst_diffuse_init (GstDiffuse * filter, GstDiffuseClass * gclass)
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{
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GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter);
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gt->precalc_map = FALSE;
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gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP;
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filter->scale = DEFAULT_SCALE;
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}
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gboolean
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gst_diffuse_plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (gst_diffuse_debug, "diffuse", 0, "diffuse");
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return gst_element_register (plugin, "diffuse", GST_RANK_NONE,
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GST_TYPE_DIFFUSE);
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}
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90
gst/geometrictransform/gstdiffuse.h
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90
gst/geometrictransform/gstdiffuse.h
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@ -0,0 +1,90 @@
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/*
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* GStreamer
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* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
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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_DIFFUSE_H__
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#define __GST_DIFFUSE_H__
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#include <gst/gst.h>
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#include "gstgeometrictransform.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_DIFFUSE \
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(gst_diffuse_get_type())
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#define GST_DIFFUSE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DIFFUSE,GstDiffuse))
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#define GST_DIFFUSE_CAST(obj) \
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((GstDiffuse *)(obj))
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#define GST_DIFFUSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DIFFUSE,GstDiffuseClass))
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#define GST_IS_DIFFUSE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DIFFUSE))
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#define GST_IS_DIFFUSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DIFFUSE))
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typedef struct _GstDiffuse GstDiffuse;
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typedef struct _GstDiffuseClass GstDiffuseClass;
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struct _GstDiffuse
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{
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GstGeometricTransform element;
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gdouble scale;
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gdouble *sin_table;
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gdouble *cos_table;
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};
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struct _GstDiffuseClass
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{
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GstGeometricTransformClass parent_class;
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};
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GType gst_diffuse_get_type (void);
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gboolean gst_diffuse_plugin_init (GstPlugin * plugin);
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G_END_DECLS
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#endif /* __GST_DIFFUSE_H__ */
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@ -22,6 +22,7 @@
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#endif
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#include "gstcircle.h"
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#include "gstdiffuse.h"
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#include "gstkaleidoscope.h"
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#include "gstpinch.h"
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#include "gstsphere.h"
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if (!gst_circle_plugin_init (plugin))
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return FALSE;
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if (!gst_diffuse_plugin_init (plugin))
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return FALSE;
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if (!gst_kaleidoscope_plugin_init (plugin))
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return FALSE;
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