gstreamer/gst/effectv/gstshagadelic.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* EffecTV:
* Copyright (C) 2001 FUKUCHI Kentarou
*
* Inspired by Adrian Likin's script for the GIMP.
* EffecTV is free software. 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 <math.h>
#include <string.h>
#include <gst/gst.h>
#include <gstvideofilter.h>
#define GST_TYPE_SHAGADELICTV \
(gst_shagadelictv_get_type())
#define GST_SHAGADELICTV(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SHAGADELICTV,GstShagadelicTV))
#define GST_SHAGADELICTV_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SHAGADELICTV,GstShagadelicTVClass))
#define GST_IS_SHAGADELICTV(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SHAGADELICTV))
#define GST_IS_SHAGADELICTV_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SHAGADELICTV))
typedef struct _GstShagadelicTV GstShagadelicTV;
typedef struct _GstShagadelicTVClass GstShagadelicTVClass;
struct _GstShagadelicTV
{
GstVideofilter videofilter;
gint width, height;
gint stat;
gchar *ripple;
gchar *spiral;
guchar phase;
gint rx, ry;
gint bx, by;
gint rvx, rvy;
gint bvx, bvy;
};
struct _GstShagadelicTVClass
{
GstVideofilterClass parent_class;
};
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
};
static void gst_shagadelictv_base_init (gpointer g_class);
static void gst_shagadelictv_class_init (gpointer g_class, gpointer class_data);
static void gst_shagadelictv_init (GTypeInstance * instance, gpointer g_class);
static void gst_shagadelic_initialize (GstShagadelicTV * filter);
static void gst_shagadelictv_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_shagadelictv_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_shagadelictv_setup (GstVideofilter * videofilter);
static void gst_shagadelictv_rgb32 (GstVideofilter * videofilter, void *d,
void *s);
/*static guint gst_shagadelictv_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_shagadelictv_get_type (void)
{
static GType shagadelictv_type = 0;
if (!shagadelictv_type) {
static const GTypeInfo shagadelictv_info = {
sizeof (GstShagadelicTVClass),
gst_shagadelictv_base_init,
NULL,
(GClassInitFunc) gst_shagadelictv_class_init,
NULL,
NULL,
sizeof (GstShagadelicTV),
0,
(GInstanceInitFunc) gst_shagadelictv_init,
};
shagadelictv_type =
g_type_register_static (GST_TYPE_VIDEOFILTER, "GstShagadelicTV",
&shagadelictv_info, 0);
}
return shagadelictv_type;
}
static GstVideofilterFormat gst_shagadelictv_formats[] = {
{"RGB ", 32, gst_shagadelictv_rgb32, 24, G_BIG_ENDIAN, 0x0000ff00, 0x00ff0000,
0xff000000}
};
static void
gst_shagadelictv_base_init (gpointer g_class)
{
/* elementfactory information */
static GstElementDetails gst_shagadelictv_details =
GST_ELEMENT_DETAILS ("ShagadelicTV",
"Filter/Effect/Video",
"Oh behave, ShagedelicTV makes images shagadelic!",
"Wim Taymans <wim.taymans@chello.be>");
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstVideofilterClass *videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
int i;
gst_element_class_set_details (element_class, &gst_shagadelictv_details);
for (i = 0; i < G_N_ELEMENTS (gst_shagadelictv_formats); i++) {
gst_videofilter_class_add_format (videofilter_class,
gst_shagadelictv_formats + i);
}
gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class));
}
static void
gst_shagadelictv_class_init (gpointer g_class, gpointer class_data)
{
GObjectClass *gobject_class;
GstVideofilterClass *videofilter_class;
gobject_class = G_OBJECT_CLASS (g_class);
videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
gobject_class->set_property = gst_shagadelictv_set_property;
gobject_class->get_property = gst_shagadelictv_get_property;
videofilter_class->setup = gst_shagadelictv_setup;
}
static void
gst_shagadelictv_init (GTypeInstance * instance, gpointer g_class)
{
GstShagadelicTV *filter = GST_SHAGADELICTV (instance);
filter->ripple = NULL;
filter->spiral = NULL;
}
static void
gst_shagadelictv_setup (GstVideofilter * videofilter)
{
GstShagadelicTV *filter;
int width = gst_videofilter_get_input_width (videofilter);
int height = gst_videofilter_get_input_height (videofilter);
int area;
g_return_if_fail (GST_IS_SHAGADELICTV (videofilter));
filter = GST_SHAGADELICTV (videofilter);
filter->width = width;
filter->height = height;
area = filter->width * filter->height;
g_free (filter->ripple);
g_free (filter->spiral);
filter->ripple = (gchar *) g_malloc (area * 4);
filter->spiral = (gchar *) g_malloc (area);
gst_shagadelic_initialize (filter);
}
static unsigned int
fastrand (void)
{
static unsigned int fastrand_val;
return (fastrand_val = fastrand_val * 1103515245 + 12345);
}
static void
gst_shagadelic_initialize (GstShagadelicTV * filter)
{
int i, x, y;
#ifdef PS2
float xx, yy;
#else
double xx, yy;
#endif
i = 0;
for (y = 0; y < filter->height * 2; y++) {
yy = y - filter->height;
yy *= yy;
for (x = 0; x < filter->width * 2; x++) {
xx = x - filter->width;
#ifdef PS2
filter->ripple[i++] = ((unsigned int) (sqrtf (xx * xx + yy) * 8)) & 255;
#else
filter->ripple[i++] = ((unsigned int) (sqrt (xx * xx + yy) * 8)) & 255;
#endif
}
}
i = 0;
for (y = 0; y < filter->height; y++) {
yy = y - filter->height / 2;
for (x = 0; x < filter->width; x++) {
xx = x - filter->width / 2;
#ifdef PS2
filter->spiral[i++] = ((unsigned int)
((atan2f (xx,
yy) / ((float) M_PI) * 256 * 9) + (sqrtf (xx * xx +
yy * yy) * 5))) & 255;
#else
filter->spiral[i++] = ((unsigned int)
((atan2 (xx, yy) / M_PI * 256 * 9) + (sqrt (xx * xx +
yy * yy) * 5))) & 255;
#endif
/* Here is another Swinger!
* ((atan2(xx, yy)/M_PI*256) + (sqrt(xx*xx+yy*yy)*10))&255;
*/
}
}
filter->rx = fastrand () % filter->width;
filter->ry = fastrand () % filter->height;
filter->bx = fastrand () % filter->width;
filter->by = fastrand () % filter->height;
filter->rvx = -2;
filter->rvy = -2;
filter->bvx = 2;
filter->bvy = 2;
filter->phase = 0;
}
static void
gst_shagadelictv_rgb32 (GstVideofilter * videofilter, void *d, void *s)
{
GstShagadelicTV *filter;
guint32 *src, *dest;
gint x, y;
guint32 v;
guchar r, g, b;
gint width, height;
filter = GST_SHAGADELICTV (videofilter);
src = (guint32 *) s;
dest = (guint32 *) d;
width = filter->width;
height = filter->height;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
v = *src++ | 0x1010100;
v = (v - 0x707060) & 0x1010100;
v -= v >> 8;
/* Try another Babe!
* v = *src++;
* *dest++ = v & ((r<<16)|(g<<8)|b);
*/
r = (gchar) (filter->ripple[(filter->ry + y) * width * 2 + filter->rx +
x] + filter->phase * 2) >> 7;
g = (gchar) (filter->spiral[y * width + x] + filter->phase * 3) >> 7;
b = (gchar) (filter->ripple[(filter->by + y) * width * 2 + filter->bx +
x] - filter->phase) >> 7;
*dest++ = v & ((r << 16) | (g << 8) | b);
}
}
filter->phase -= 8;
if ((filter->rx + filter->rvx) < 0 || (filter->rx + filter->rvx) >= width)
filter->rvx = -filter->rvx;
if ((filter->ry + filter->rvy) < 0 || (filter->ry + filter->rvy) >= height)
filter->rvy = -filter->rvy;
if ((filter->bx + filter->bvx) < 0 || (filter->bx + filter->bvx) >= width)
filter->bvx = -filter->bvx;
if ((filter->by + filter->bvy) < 0 || (filter->by + filter->bvy) >= height)
filter->bvy = -filter->bvy;
filter->rx += filter->rvx;
filter->ry += filter->rvy;
filter->bx += filter->bvx;
filter->by += filter->bvy;
}
static void
gst_shagadelictv_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstShagadelicTV *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_SHAGADELICTV (object));
filter = GST_SHAGADELICTV (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_shagadelictv_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstShagadelicTV *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_SHAGADELICTV (object));
filter = GST_SHAGADELICTV (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}