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286 lines
8.6 KiB
C
286 lines
8.6 KiB
C
/*
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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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/**
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* SECTION:element-marble
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* @title: marble
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* @see_also: geometrictransform
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*
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* Marble is a geometric image transform element. It applies a marbling effect
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* to the image.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v videotestsrc ! marble ! videoconvert ! autovideosink
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* ]|
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*
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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 "gstmarble.h"
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GST_DEBUG_CATEGORY_STATIC (gst_marble_debug);
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#define GST_CAT_DEFAULT gst_marble_debug
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enum
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{
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PROP_0,
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PROP_XSCALE,
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PROP_YSCALE,
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PROP_AMOUNT,
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PROP_TURBULENCE
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};
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#define DEFAULT_XSCALE 4
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#define DEFAULT_YSCALE 4
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#define DEFAULT_AMOUNT 1
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#define DEFAULT_TURBULENCE 1
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#define gst_marble_parent_class parent_class
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G_DEFINE_TYPE (GstMarble, gst_marble, GST_TYPE_GEOMETRIC_TRANSFORM);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (marble, "marble", GST_RANK_NONE,
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GST_TYPE_MARBLE, GST_DEBUG_CATEGORY_INIT (gst_marble_debug, "marble", 0,
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"marble"));
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static void
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gst_marble_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstMarble *marble;
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GstGeometricTransform *gt;
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gdouble v;
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gt = GST_GEOMETRIC_TRANSFORM_CAST (object);
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marble = GST_MARBLE_CAST (object);
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GST_OBJECT_LOCK (gt);
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switch (prop_id) {
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case PROP_XSCALE:
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v = g_value_get_double (value);
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if (v != marble->xscale) {
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marble->xscale = v;
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gst_geometric_transform_set_need_remap (gt);
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}
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break;
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case PROP_YSCALE:
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v = g_value_get_double (value);
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if (v != marble->yscale) {
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marble->yscale = v;
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gst_geometric_transform_set_need_remap (gt);
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}
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break;
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case PROP_AMOUNT:
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v = g_value_get_double (value);
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if (v != marble->amount) {
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marble->amount = v;
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gst_geometric_transform_set_need_remap (gt);
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}
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break;
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case PROP_TURBULENCE:
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v = g_value_get_double (value);
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if (v != marble->turbulence) {
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marble->turbulence = v;
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gst_geometric_transform_set_need_remap (gt);
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}
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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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GST_OBJECT_UNLOCK (gt);
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}
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static void
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gst_marble_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstMarble *marble;
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marble = GST_MARBLE_CAST (object);
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switch (prop_id) {
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case PROP_XSCALE:
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g_value_set_double (value, marble->xscale);
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break;
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case PROP_YSCALE:
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g_value_set_double (value, marble->yscale);
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break;
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case PROP_AMOUNT:
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g_value_set_double (value, marble->amount);
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break;
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case PROP_TURBULENCE:
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g_value_set_double (value, marble->turbulence);
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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_marble_finalize (GObject * obj)
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{
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GstMarble *marble = GST_MARBLE_CAST (obj);
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gst_gm_noise_free (marble->noise);
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g_free (marble->sin_table);
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g_free (marble->cos_table);
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G_OBJECT_CLASS (parent_class)->finalize (obj);
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}
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static gboolean
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marble_prepare (GstGeometricTransform * trans)
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{
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GstMarble *marble = GST_MARBLE_CAST (trans);
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gint i;
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if (!marble->noise) {
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marble->noise = gst_gm_noise_new ();
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}
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g_free (marble->sin_table);
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g_free (marble->cos_table);
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marble->sin_table = g_malloc0 (sizeof (gdouble) * 256);
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marble->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 * marble->turbulence;
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marble->sin_table[i] = -marble->yscale * sin (angle);
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marble->cos_table[i] = marble->yscale * 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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marble_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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GstMarble *marble = GST_MARBLE_CAST (gt);
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gint displacement;
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displacement = 127 * (1 + gst_gm_noise_2 (marble->noise, x / marble->xscale,
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y / marble->xscale));
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displacement = CLAMP (displacement, 0, 255);
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*in_x = x + marble->sin_table[displacement];
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*in_y = y + marble->cos_table[displacement];
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GST_DEBUG_OBJECT (marble, "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_marble_class_init (GstMarbleClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstGeometricTransformClass *gstgt_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstgt_class = (GstGeometricTransformClass *) klass;
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gst_element_class_set_static_metadata (gstelement_class,
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"marble",
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"Transform/Effect/Video",
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"Applies a marbling effect to the image",
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"Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
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gobject_class->finalize = gst_marble_finalize;
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gobject_class->set_property = gst_marble_set_property;
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gobject_class->get_property = gst_marble_get_property;
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g_object_class_install_property (gobject_class, PROP_XSCALE,
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g_param_spec_double ("x-scale", "x-scale",
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"X scale of the texture",
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0, G_MAXDOUBLE, DEFAULT_XSCALE,
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GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_YSCALE,
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g_param_spec_double ("y-scale", "y-scale",
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"Y scale of the texture",
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0, G_MAXDOUBLE, DEFAULT_YSCALE,
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GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_AMOUNT,
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g_param_spec_double ("amount", "amount",
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"Amount of effect",
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0.0, 1.0, DEFAULT_AMOUNT,
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GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_YSCALE,
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g_param_spec_double ("turbulence", "turbulence",
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"Turbulence of the effect",
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0.0, 1.0, DEFAULT_TURBULENCE,
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GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstgt_class->prepare_func = marble_prepare;
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gstgt_class->map_func = marble_map;
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}
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static void
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gst_marble_init (GstMarble * filter)
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{
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GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter);
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gt->precalc_map = TRUE;
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gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP;
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filter->xscale = DEFAULT_XSCALE;
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filter->yscale = DEFAULT_YSCALE;
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filter->amount = DEFAULT_AMOUNT;
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filter->turbulence = DEFAULT_TURBULENCE;
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}
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