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marble: Adds 'marble' element to geometrictransform

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Adds a new element that does a marbling effect to
geometrictransform plugin
This commit is contained in:
Thiago Santos 2010-06-06 22:34:55 -03:00
parent a45a1d70dd
commit 017808ef8d
6 changed files with 489 additions and 0 deletions
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2
gst/geometrictransform/Makefile.am
View file

@ -7,6 +7,7 @@ libgstgeometrictransform_la_SOURCES = plugin.c \
gstcircle.c \
gstdiffuse.c \
gstkaleidoscope.c \
gstmarble.c \
gstpinch.c \
gstsphere.c \
gsttwirl.c \
@ -24,6 +25,7 @@ noinst_HEADERS = gstgeometrictransform.h \
gstcircle.h \
gstdiffuse.h \
gstkaleidoscope.h \
gstmarble.h \
gstpinch.h \
gstsphere.h \
gsttwirl.h \

116
gst/geometrictransform/geometricmath.c
View file

@ -48,6 +48,122 @@
*/
#include "geometricmath.h"
#include <math.h>
#define N 0x1000
#define B 0x100
#define BM 0xff
struct _Noise
{
gdouble p[2 * B + 2];
gdouble g2[2 * B + 2][2];
};
static void
normalize_2 (gdouble * v)
{
gdouble s = sqrt (v[0] * v[0] + v[1] * v[1]);
v[0] = v[0] / s;
v[1] = v[1] / s;
}
Noise *
noise_new (void)
{
Noise *noise = g_new0 (Noise, 1);
gint i, j, k;
for (i = 0; i < B; i++) {
noise->p[i] = i;
for (j = 0; j < 2; j++) {
noise->g2[i][j] = ((g_random_int () % (2 * B))
- B) / (gdouble) B;
}
normalize_2 (noise->g2[i]);
}
for (i = B - 1; i >= 0; i--) {
k = noise->p[i];
j = g_random_int () % B;
noise->p[i] = noise->p[j];
noise->p[j] = k;
}
for (i = 0; i < B + 2; i++) {
noise->p[B + i] = noise->p[i];
for (j = 0; j < 2; j++) {
noise->g2[B + i][j] = noise->g2[i][j];
}
}
return noise;
}
void
noise_free (Noise * noise)
{
g_free (noise);
}
static gdouble
s_curve (gdouble x)
{
return x * x * (3.0 - 2.0 * x);
}
static gdouble
lerp (gdouble t, gdouble a, gdouble b)
{
return a + t * (b - a);
}
gdouble
noise_2 (Noise * noise, gdouble x, gdouble y)
{
gint bx0, bx1, by0, by1, b00, b10, b01, b11;
gdouble rx0, rx1, ry0, ry1, sx, sy, a, b, t, u, v;
gdouble *q;
gint i, j;
t = x + N;
bx0 = ((gint) t) & BM;
bx1 = (bx0 + 1) & BM;
rx0 = t - (gint) t;
rx1 = rx0 - 1.0;
t = y + N;
by0 = ((gint) t) & BM;
by1 = (by0 + 1) & BM;
ry0 = t - (gint) t;
ry1 = ry0 - 1.0;
i = noise->p[bx0];
j = noise->p[bx1];
b00 = noise->p[i + by0];
b10 = noise->p[j + by0];
b01 = noise->p[i + by1];
b11 = noise->p[j + by1];
sx = s_curve (rx0);
sy = s_curve (ry0);
q = noise->g2[b00];
u = rx0 * q[0] + ry0 * q[1];
q = noise->g2[b10];
v = rx1 * q[0] + ry0 * q[1];
a = lerp (sx, u, v);
q = noise->g2[b01];
u = rx0 * q[0] + ry1 * q[1];
q = noise->g2[b11];
v = rx1 * q[0] + ry1 * q[1];
b = lerp (sx, u, v);
return 1.5 * lerp (sy, a, b);
}
/*
* This differs from the % operator with respect to negative numbers

6
gst/geometrictransform/geometricmath.h
View file

@ -54,6 +54,12 @@
G_BEGIN_DECLS
typedef struct _Noise Noise;
Noise * noise_new (void);
void noise_free (Noise * noise);
gdouble noise_2 (Noise * noise, gdouble x, gdouble y);
gdouble mod_float (gdouble a, gdouble b);
gdouble geometric_math_triangle (gdouble x);

266
gst/geometrictransform/gstmarble.c Normal file
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@ -0,0 +1,266 @@
/*
* 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 "gstmarble.h"
GST_DEBUG_CATEGORY_STATIC (gst_marble_debug);
#define GST_CAT_DEFAULT gst_marble_debug
enum
{
PROP_0,
PROP_XSCALE,
PROP_YSCALE,
PROP_AMOUNT,
PROP_TURBULENCE
};
#define DEFAULT_XSCALE 4
#define DEFAULT_YSCALE 4
#define DEFAULT_AMOUNT 1
#define DEFAULT_TURBULENCE 1
GST_BOILERPLATE (GstMarble, gst_marble, GstGeometricTransform,
GST_TYPE_GEOMETRIC_TRANSFORM);
static void
gst_marble_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstMarble *marble;
marble = GST_MARBLE_CAST (object);
switch (prop_id) {
case PROP_XSCALE:
marble->xscale = g_value_get_double (value);
break;
case PROP_YSCALE:
marble->yscale = g_value_get_double (value);
break;
case PROP_AMOUNT:
marble->amount = g_value_get_double (value);
break;
case PROP_TURBULENCE:
marble->turbulence = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_marble_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMarble *marble;
marble = GST_MARBLE_CAST (object);
switch (prop_id) {
case PROP_XSCALE:
g_value_set_double (value, marble->xscale);
break;
case PROP_YSCALE:
g_value_set_double (value, marble->yscale);
break;
case PROP_AMOUNT:
g_value_set_double (value, marble->amount);
break;
case PROP_TURBULENCE:
g_value_set_double (value, marble->turbulence);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* Clean up */
static void
gst_marble_finalize (GObject * obj)
{
GstMarble *marble = GST_MARBLE_CAST (obj);
noise_free (marble->noise);
g_free (marble->sin_table);
g_free (marble->cos_table);
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
/* GObject vmethod implementations */
static void
gst_marble_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_details_simple (element_class,
"marble",
"Transform/Effect/Video",
"Applies a marbling effect to the image",
"Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
}
static gboolean
marble_prepare (GstGeometricTransform * trans)
{
GstMarble *marble = GST_MARBLE_CAST (trans);
gint i;
if (!marble->noise) {
marble->noise = noise_new ();
}
g_free (marble->sin_table);
g_free (marble->cos_table);
marble->sin_table = g_malloc0 (sizeof (gdouble) * 256);
marble->cos_table = g_malloc0 (sizeof (gdouble) * 256);
for (i = 0; i < 256; i++) {
gdouble angle = (G_PI * 2 * i) / 256.0 * marble->turbulence;
marble->sin_table[i] = -marble->yscale * sin (angle);
marble->cos_table[i] = marble->yscale * cos (angle);
}
return TRUE;
}
static gboolean
marble_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
gdouble * in_y)
{
GstMarble *marble = GST_MARBLE_CAST (gt);
gint displacement;
displacement = 127 * (1 + noise_2 (marble->noise, x / marble->xscale,
y / marble->xscale));
displacement = CLAMP (displacement, 0, 255);
*in_x = x + marble->sin_table[displacement];
*in_y = y + marble->cos_table[displacement];
GST_DEBUG_OBJECT (marble, "Inversely mapped %d %d into %lf %lf",
x, y, *in_x, *in_y);
return TRUE;
}
static void
gst_marble_class_init (GstMarbleClass * klass)
{
GObjectClass *gobject_class;
GstGeometricTransformClass *gstgt_class;
gobject_class = (GObjectClass *) klass;
gstgt_class = (GstGeometricTransformClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_marble_finalize);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_marble_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_marble_get_property);
g_object_class_install_property (gobject_class, PROP_XSCALE,
g_param_spec_double ("x-scale", "x-scale",
"X scale of the texture",
0, G_MAXDOUBLE, DEFAULT_XSCALE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_YSCALE,
g_param_spec_double ("y-scale", "y-scale",
"Y scale of the texture",
0, G_MAXDOUBLE, DEFAULT_YSCALE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_AMOUNT,
g_param_spec_double ("amount", "amount",
"Amount of effect",
0.0, 1.0, DEFAULT_AMOUNT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_YSCALE,
g_param_spec_double ("turbulence", "turbulence",
"Turbulence of the effect",
0.0, 1.0, DEFAULT_TURBULENCE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstgt_class->prepare_func = marble_prepare;
gstgt_class->map_func = marble_map;
}
static void
gst_marble_init (GstMarble * filter, GstMarbleClass * gclass)
{
GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter);
gt->precalc_map = TRUE;
gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP;
filter->xscale = DEFAULT_XSCALE;
filter->yscale = DEFAULT_YSCALE;
filter->amount = DEFAULT_AMOUNT;
filter->turbulence = DEFAULT_TURBULENCE;
}
gboolean
gst_marble_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_marble_debug, "marble", 0, "marble");
return gst_element_register (plugin, "marble", GST_RANK_NONE,
GST_TYPE_MARBLE);
}

95
gst/geometrictransform/gstmarble.h Normal file
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@ -0,0 +1,95 @@
/*
* 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.
*/
#ifndef __GST_MARBLE_H__
#define __GST_MARBLE_H__
#include <gst/gst.h>
#include "gstgeometrictransform.h"
#include "geometricmath.h"
G_BEGIN_DECLS
/* #defines don't like whitespacey bits */
#define GST_TYPE_MARBLE \
(gst_marble_get_type())
#define GST_MARBLE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MARBLE,GstMarble))
#define GST_MARBLE_CAST(obj) \
((GstMarble *)(obj))
#define GST_MARBLE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MARBLE,GstMarbleClass))
#define GST_IS_MARBLE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MARBLE))
#define GST_IS_MARBLE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MARBLE))
typedef struct _GstMarble GstMarble;
typedef struct _GstMarbleClass GstMarbleClass;
struct _GstMarble
{
GstGeometricTransform element;
gdouble xscale;
gdouble yscale;
gdouble turbulence;
gdouble amount;
Noise *noise;
gdouble *sin_table;
gdouble *cos_table;
};
struct _GstMarbleClass
{
GstGeometricTransformClass parent_class;
};
GType gst_marble_get_type (void);
gboolean gst_marble_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_MARBLE_H__ */

4
gst/geometrictransform/plugin.c
View file

@ -24,6 +24,7 @@
#include "gstcircle.h"
#include "gstdiffuse.h"
#include "gstkaleidoscope.h"
#include "gstmarble.h"
#include "gstpinch.h"
#include "gstsphere.h"
#include "gsttwirl.h"
@ -41,6 +42,9 @@ plugin_init (GstPlugin * plugin)
if (!gst_kaleidoscope_plugin_init (plugin))
return FALSE;
if (!gst_marble_plugin_init (plugin))
return FALSE;
if (!gst_pinch_plugin_init (plugin))
return FALSE;