gstreamer/gst/effectv/gstvertigo.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 <math.h>
#include <string.h>
#include <gst/gst.h>
#include <gstvideofilter.h>
#define GST_TYPE_VERTIGOTV \
(gst_vertigotv_get_type())
#define GST_VERTIGOTV(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VERTIGOTV,GstVertigoTV))
#define GST_VERTIGOTV_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VERTIGOTV,GstVertigoTVClass))
#define GST_IS_VERTIGOTV(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VERTIGOTV))
#define GST_IS_VERTIGOTV_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VERTIGOTV))
typedef struct _GstVertigoTV GstVertigoTV;
typedef struct _GstVertigoTVClass GstVertigoTVClass;
struct _GstVertigoTV
{
GstVideofilter videofilter;
gint width, height;
guint32 *buffer;
guint32 *current_buffer, *alt_buffer;
gint dx, dy;
gint sx, sy;
gdouble phase;
gdouble phase_increment;
gdouble zoomrate;
};
struct _GstVertigoTVClass
{
GstVideofilterClass parent_class;
void (*reset) (GstElement * element);
};
/* Filter signals and args */
enum
{
/* FILL ME */
RESET_SIGNAL,
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_SPEED,
ARG_ZOOM_SPEED
};
static void gst_vertigotv_base_init (gpointer g_class);
static void gst_vertigotv_class_init (GstVertigoTVClass * klass,
gpointer class_data);
static void gst_vertigotv_init (GTypeInstance * instance, gpointer g_class);
static void gst_vertigotv_setup (GstVideofilter * videofilter);
static void gst_vertigotv_reset_handler (GstElement * element);
static void gst_vertigotv_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_vertigotv_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_vertigotv_rgb32 (GstVideofilter * videofilter, void *d,
void *s);
static guint gst_vertigotv_signals[LAST_SIGNAL] = { 0 };
GType
gst_vertigotv_get_type (void)
{
static GType vertigotv_type = 0;
if (!vertigotv_type) {
static const GTypeInfo vertigotv_info = {
sizeof (GstVertigoTVClass),
gst_vertigotv_base_init,
NULL,
(GClassInitFunc) gst_vertigotv_class_init,
NULL,
NULL,
sizeof (GstVertigoTV),
0,
(GInstanceInitFunc) gst_vertigotv_init,
};
vertigotv_type =
g_type_register_static (GST_TYPE_VIDEOFILTER, "GstVertigoTV",
&vertigotv_info, 0);
}
return vertigotv_type;
}
static GstVideofilterFormat gst_vertigotv_formats[] = {
{"RGB ", 32, gst_vertigotv_rgb32, 24, G_BIG_ENDIAN, 0x0000ff00, 0x00ff0000,
0xff000000}
};
static void
gst_vertigotv_base_init (gpointer g_class)
{
/* elementfactory information */
static GstElementDetails vertigotv_details = GST_ELEMENT_DETAILS ("VertigoTV",
"Filter/Effect/Video",
"A loopback alpha blending effector with rotating and scaling",
"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, &vertigotv_details);
for (i = 0; i < G_N_ELEMENTS (gst_vertigotv_formats); i++) {
gst_videofilter_class_add_format (videofilter_class,
gst_vertigotv_formats + i);
}
gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class));
}
static void
gst_vertigotv_class_init (GstVertigoTVClass * klass, gpointer class_data)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstVideofilterClass *videofilter_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
videofilter_class = GST_VIDEOFILTER_CLASS (klass);
gst_vertigotv_signals[RESET_SIGNAL] =
g_signal_new ("reset-parms",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstVertigoTVClass, reset),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
klass->reset = gst_vertigotv_reset_handler;
gobject_class->set_property = gst_vertigotv_set_property;
gobject_class->get_property = gst_vertigotv_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SPEED,
g_param_spec_float ("speed", "Speed", "Control the speed of movement",
0.01, 100.0, 0.02, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ZOOM_SPEED,
g_param_spec_float ("zoom_speed", "Zoom Speed",
"Control the rate of zooming", 1.01, 1.1, 1.01, G_PARAM_READWRITE));
videofilter_class->setup = gst_vertigotv_setup;
}
static void
gst_vertigotv_reset_handler (GstElement * element)
{
GstVertigoTV *filter = GST_VERTIGOTV (element);
filter->phase = 0.0;
filter->phase_increment = 0.02;
filter->zoomrate = 1.01;
}
static void
gst_vertigotv_setup (GstVideofilter * videofilter)
{
GstVertigoTV *filter;
gint area;
int width = gst_videofilter_get_input_width (videofilter);
int height = gst_videofilter_get_input_height (videofilter);
g_return_if_fail (GST_IS_VERTIGOTV (videofilter));
filter = GST_VERTIGOTV (videofilter);
filter->width = width;
filter->height = height;
area = width * height;
g_free (filter->buffer);
filter->buffer = (guint32 *) g_malloc (area * 2 * sizeof (guint32));
memset (filter->buffer, 0, area * 2 * sizeof (guint32));
filter->current_buffer = filter->buffer;
filter->alt_buffer = filter->buffer + area;
filter->phase = 0;
}
static void
gst_vertigotv_init (GTypeInstance * instance, gpointer g_class)
{
GstVertigoTV *filter = GST_VERTIGOTV (instance);
filter->buffer = NULL;
filter->phase = 0.0;
filter->phase_increment = 0.02;
filter->zoomrate = 1.01;
}
static void
gst_vertigotv_set_parms (GstVertigoTV * filter)
{
double vx, vy;
double t;
double x, y;
double dizz;
dizz = sin (filter->phase) * 10 + sin (filter->phase * 1.9 + 5) * 5;
x = filter->width / 2;
y = filter->height / 2;
t = (x * x + y * y) * filter->zoomrate;
if (filter->width > filter->height) {
if (dizz >= 0) {
if (dizz > x)
dizz = x;
vx = (x * (x - dizz) + y * y) / t;
} else {
if (dizz < -x)
dizz = -x;
vx = (x * (x + dizz) + y * y) / t;
}
vy = (dizz * y) / t;
} else {
if (dizz >= 0) {
if (dizz > y)
dizz = y;
vx = (x * x + y * (y - dizz)) / t;
} else {
if (dizz < -y)
dizz = -y;
vx = (x * x + y * (y + dizz)) / t;
}
vy = (dizz * x) / t;
}
filter->dx = vx * 65536;
filter->dy = vy * 65536;
filter->sx = (-vx * x + vy * y + x + cos (filter->phase * 5) * 2) * 65536;
filter->sy = (-vx * y - vy * x + y + sin (filter->phase * 6) * 2) * 65536;
filter->phase += filter->phase_increment;
if (filter->phase > 5700000)
filter->phase = 0;
}
static void
gst_vertigotv_rgb32 (GstVideofilter * videofilter, void *d, void *s)
{
GstVertigoTV *filter;
guint32 *src, *dest;
guint32 *p;
guint32 v;
gint x, y;
gint ox, oy;
gint i;
gint width, height, area;
filter = GST_VERTIGOTV (videofilter);
src = (guint32 *) s;
dest = (guint32 *) d;
width = filter->width;
height = filter->height;
area = width * height;
gst_vertigotv_set_parms (filter);
p = filter->alt_buffer;
for (y = height; y > 0; y--) {
ox = filter->sx;
oy = filter->sy;
for (x = width; x > 0; x--) {
i = (oy >> 16) * width + (ox >> 16);
if (i < 0)
i = 0;
if (i >= area)
i = area;
v = filter->current_buffer[i] & 0xfcfcff;
v = (v * 3) + ((*src++) & 0xfcfcff);
*p++ = (v >> 2);
ox += filter->dx;
oy += filter->dy;
}
filter->sx -= filter->dy;
filter->sy += filter->dx;
}
memcpy (dest, filter->alt_buffer, area * sizeof (guint32));
p = filter->current_buffer;
filter->current_buffer = filter->alt_buffer;
filter->alt_buffer = p;
}
static void
gst_vertigotv_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVertigoTV *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_VERTIGOTV (object));
filter = GST_VERTIGOTV (object);
switch (prop_id) {
case ARG_SPEED:
filter->phase_increment = g_value_get_float (value);
break;
case ARG_ZOOM_SPEED:
filter->zoomrate = g_value_get_float (value);
break;
default:
break;
}
}
static void
gst_vertigotv_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVertigoTV *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_VERTIGOTV (object));
filter = GST_VERTIGOTV (object);
switch (prop_id) {
case ARG_SPEED:
g_value_set_float (value, filter->phase_increment);
break;
case ARG_ZOOM_SPEED:
g_value_set_float (value, filter->zoomrate);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}