gstreamer/gst/effectv/gstedge.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* EffecTV:
* Copyright (C) 2001 FUKUCHI Kentarou
*
* 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 <string.h>
#include <gst/gst.h>
#include <gstvideofilter.h>
#define GST_TYPE_EDGETV \
(gst_edgetv_get_type())
#define GST_EDGETV(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_EDGETV,GstEdgeTV))
#define GST_EDGETV_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_EDGETV,GstEdgeTVClass))
#define GST_IS_EDGETV(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_EDGETV))
#define GST_IS_EDGETV_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_EDGETV))
typedef struct _GstEdgeTV GstEdgeTV;
typedef struct _GstEdgeTVClass GstEdgeTVClass;
struct _GstEdgeTV
{
GstVideofilter videofilter;
gint width, height;
gint map_width, map_height;
guint32 *map;
gint video_width_margin;
};
struct _GstEdgeTVClass
{
GstVideofilterClass parent_class;
};
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
};
static void gst_edgetv_base_init (gpointer g_class);
static void gst_edgetv_class_init (gpointer g_class, gpointer class_data);
static void gst_edgetv_init (GTypeInstance * instance, gpointer g_class);
static void gst_edgetv_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_edgetv_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_edgetv_setup (GstVideofilter * videofilter);
static void gst_edgetv_rgb32 (GstVideofilter * videofilter, void *d, void *s);
/*static guint gst_edgetv_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_edgetv_get_type (void)
{
static GType edgetv_type = 0;
if (!edgetv_type) {
static const GTypeInfo edgetv_info = {
sizeof (GstEdgeTVClass),
gst_edgetv_base_init,
NULL,
(GClassInitFunc) gst_edgetv_class_init,
NULL,
NULL,
sizeof (GstEdgeTV),
0,
(GInstanceInitFunc) gst_edgetv_init,
};
edgetv_type =
g_type_register_static (GST_TYPE_VIDEOFILTER, "GstEdgeTV", &edgetv_info,
0);
}
return edgetv_type;
}
static GstVideofilterFormat gst_edgetv_formats[] = {
{"RGB ", 32, gst_edgetv_rgb32, 24, G_BIG_ENDIAN, 0x0000ff00, 0x00ff0000,
0xff000000}
};
static void
gst_edgetv_base_init (gpointer g_class)
{
/* elementfactory information */
static GstElementDetails gst_edgetv_details = GST_ELEMENT_DETAILS ("EdgeTV",
"Filter/Effect/Video",
"Apply edge detect on video",
"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_edgetv_details);
for (i = 0; i < G_N_ELEMENTS (gst_edgetv_formats); i++) {
gst_videofilter_class_add_format (videofilter_class,
gst_edgetv_formats + i);
}
gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class));
}
static void
gst_edgetv_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_edgetv_set_property;
gobject_class->get_property = gst_edgetv_get_property;
videofilter_class->setup = gst_edgetv_setup;
}
static void
gst_edgetv_init (GTypeInstance * instance, gpointer g_class)
{
GstEdgeTV *edgetv = GST_EDGETV (instance);
edgetv->map = NULL;
}
static void
gst_edgetv_setup (GstVideofilter * videofilter)
{
GstEdgeTV *edgetv;
int width = gst_videofilter_get_input_width (videofilter);
int height = gst_videofilter_get_input_height (videofilter);
g_return_if_fail (GST_IS_EDGETV (videofilter));
edgetv = GST_EDGETV (videofilter);
edgetv->width = width;
edgetv->height = height;
edgetv->map_width = width / 4;
edgetv->map_height = height / 4;
edgetv->video_width_margin = width % 4;
g_free (edgetv->map);
edgetv->map =
(guint32 *) g_malloc (edgetv->map_width * edgetv->map_height *
sizeof (guint32) * 2);
memset (edgetv->map, 0,
edgetv->map_width * edgetv->map_height * sizeof (guint32) * 2);
}
static void
gst_edgetv_rgb32 (GstVideofilter * videofilter, void *d, void *s)
{
GstEdgeTV *filter;
int x, y;
int r, g, b;
guint32 *src, *dest;
guint32 p, q;
guint32 v0, v1, v2, v3;
filter = GST_EDGETV (videofilter);
src = (guint32 *) s;
dest = (guint32 *) d;
src += filter->width * 4 + 4;
dest += filter->width * 4 + 4;
for (y = 1; y < filter->map_height - 1; y++) {
for (x = 1; x < filter->map_width - 1; x++) {
p = *src;
q = *(src - 4);
/* difference between the current pixel and right neighbor. */
r = ((p & 0xff0000) - (q & 0xff0000)) >> 16;
g = ((p & 0xff00) - (q & 0xff00)) >> 8;
b = (p & 0xff) - (q & 0xff);
r *= r;
g *= g;
b *= b;
r = r >> 5; /* To lack the lower bit for saturated addition, */
g = g >> 5; /* devide the value with 32, instead of 16. It is */
b = b >> 4; /* same as `v2 &= 0xfefeff' */
if (r > 127)
r = 127;
if (g > 127)
g = 127;
if (b > 255)
b = 255;
v2 = (r << 17) | (g << 9) | b;
/* difference between the current pixel and upper neighbor. */
q = *(src - filter->width * 4);
r = ((p & 0xff0000) - (q & 0xff0000)) >> 16;
g = ((p & 0xff00) - (q & 0xff00)) >> 8;
b = (p & 0xff) - (q & 0xff);
r *= r;
g *= g;
b *= b;
r = r >> 5;
g = g >> 5;
b = b >> 4;
if (r > 127)
r = 127;
if (g > 127)
g = 127;
if (b > 255)
b = 255;
v3 = (r << 17) | (g << 9) | b;
v0 = filter->map[(y - 1) * filter->map_width * 2 + x * 2];
v1 = filter->map[y * filter->map_width * 2 + (x - 1) * 2 + 1];
filter->map[y * filter->map_width * 2 + x * 2] = v2;
filter->map[y * filter->map_width * 2 + x * 2 + 1] = v3;
r = v0 + v1;
g = r & 0x01010100;
dest[0] = r | (g - (g >> 8));
r = v0 + v3;
g = r & 0x01010100;
dest[1] = r | (g - (g >> 8));
dest[2] = v3;
dest[3] = v3;
r = v2 + v1;
g = r & 0x01010100;
dest[filter->width] = r | (g - (g >> 8));
r = v2 + v3;
g = r & 0x01010100;
dest[filter->width + 1] = r | (g - (g >> 8));
dest[filter->width + 2] = v3;
dest[filter->width + 3] = v3;
dest[filter->width * 2] = v2;
dest[filter->width * 2 + 1] = v2;
dest[filter->width * 3] = v2;
dest[filter->width * 3 + 1] = v2;
src += 4;
dest += 4;
}
src += filter->width * 3 + 8 + filter->video_width_margin;
dest += filter->width * 3 + 8 + filter->video_width_margin;
}
}
static void
gst_edgetv_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstEdgeTV *filter;
g_return_if_fail (GST_IS_EDGETV (object));
filter = GST_EDGETV (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_edgetv_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstEdgeTV *filter;
g_return_if_fail (GST_IS_EDGETV (object));
filter = GST_EDGETV (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}