gstreamer/gst/effectv/gstquark.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 "gsteffectv.h"
#define GST_TYPE_QUARKTV \
(gst_quarktv_get_type())
#define GST_QUARKTV(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QUARKTV,GstQuarkTV))
#define GST_QUARKTV_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QUARKTV,GstQuarkTVClass))
#define GST_IS_QUARKTV(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QUARKTV))
#define GST_IS_QUARKTV_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QUARKTV))
/* number of frames of time-buffer. It should be as a configurable paramter */
/* This number also must be 2^n just for the speed. */
#define PLANES 16
typedef struct _GstQuarkTV GstQuarkTV;
typedef struct _GstQuarkTVClass GstQuarkTVClass;
struct _GstQuarkTV
{
GstElement element;
GstPad *sinkpad, *srcpad;
gint width, height;
gint area;
gint planes;
gint current_plane;
GstBuffer **planetable;
};
struct _GstQuarkTVClass
{
GstElementClass parent_class;
};
/* elementfactory information */
static GstElementDetails gst_quarktv_details = GST_ELEMENT_DETAILS ("QuarkTV",
"Filter/Effect/Video",
"Motion dissolver",
"FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>");
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_PLANES
};
static void gst_quarktv_base_init (gpointer g_class);
static void gst_quarktv_class_init (GstQuarkTVClass * klass);
static void gst_quarktv_init (GstQuarkTV * filter);
static GstElementStateReturn gst_quarktv_change_state (GstElement * element);
static void gst_quarktv_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_quarktv_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_quarktv_chain (GstPad * pad, GstData * _data);
static GstElementClass *parent_class = NULL;
/* static guint gst_quarktv_signals[LAST_SIGNAL] = { 0 }; */
static inline guint32
fastrand (void)
{
static unsigned int fastrand_val;
return (fastrand_val = fastrand_val * 1103515245 + 12345);
}
GType
gst_quarktv_get_type (void)
{
static GType quarktv_type = 0;
if (!quarktv_type) {
static const GTypeInfo quarktv_info = {
sizeof (GstQuarkTVClass),
gst_quarktv_base_init,
NULL,
(GClassInitFunc) gst_quarktv_class_init,
NULL,
NULL,
sizeof (GstQuarkTV),
0,
(GInstanceInitFunc) gst_quarktv_init,
};
quarktv_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstQuarkTV", &quarktv_info,
0);
}
return quarktv_type;
}
static void
gst_quarktv_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_effectv_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_effectv_sink_template));
gst_element_class_set_details (element_class, &gst_quarktv_details);
}
static void
gst_quarktv_class_init (GstQuarkTVClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PLANES,
g_param_spec_int ("planes", "Planes", "Number of frames in the buffer",
1, 32, PLANES, G_PARAM_READWRITE));
gobject_class->set_property = gst_quarktv_set_property;
gobject_class->get_property = gst_quarktv_get_property;
gstelement_class->change_state = gst_quarktv_change_state;
}
static GstPadLinkReturn
gst_quarktv_link (GstPad * pad, const GstCaps * caps)
{
GstQuarkTV *filter;
GstPad *otherpad;
gint i;
GstStructure *structure;
GstPadLinkReturn res;
filter = GST_QUARKTV (gst_pad_get_parent (pad));
g_return_val_if_fail (GST_IS_QUARKTV (filter), GST_PAD_LINK_REFUSED);
otherpad = (pad == filter->srcpad ? filter->sinkpad : filter->srcpad);
res = gst_pad_try_set_caps (otherpad, caps);
if (GST_PAD_LINK_FAILED (res))
return res;
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "width", &filter->width) ||
!gst_structure_get_int (structure, "height", &filter->height))
return GST_PAD_LINK_REFUSED;
filter->area = filter->width * filter->height;
for (i = 0; i < filter->planes; i++) {
if (filter->planetable[i])
gst_buffer_unref (filter->planetable[i]);
filter->planetable[i] = NULL;
}
return GST_PAD_LINK_OK;
}
static void
gst_quarktv_init (GstQuarkTV * filter)
{
filter->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_effectv_sink_template), "sink");
gst_pad_set_getcaps_function (filter->sinkpad, gst_pad_proxy_getcaps);
gst_pad_set_chain_function (filter->sinkpad, gst_quarktv_chain);
gst_pad_set_link_function (filter->sinkpad, gst_quarktv_link);
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
filter->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_effectv_src_template), "src");
gst_pad_set_getcaps_function (filter->srcpad, gst_pad_proxy_getcaps);
gst_pad_set_link_function (filter->srcpad, gst_quarktv_link);
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
filter->planes = PLANES;
filter->current_plane = filter->planes - 1;
filter->planetable =
(GstBuffer **) g_malloc (filter->planes * sizeof (GstBuffer *));
memset (filter->planetable, 0, filter->planes * sizeof (GstBuffer *));
}
static void
gst_quarktv_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstQuarkTV *filter;
guint32 *src, *dest;
GstBuffer *outbuf;
gint area;
filter = GST_QUARKTV (gst_pad_get_parent (pad));
src = (guint32 *) GST_BUFFER_DATA (buf);
area = filter->area;
outbuf = gst_buffer_new ();
GST_BUFFER_SIZE (outbuf) = area * sizeof (guint32);
GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
dest = (guint32 *) GST_BUFFER_DATA (outbuf);
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
if (filter->planetable[filter->current_plane])
gst_buffer_unref (filter->planetable[filter->current_plane]);
filter->planetable[filter->current_plane] = buf;
while (--area) {
GstBuffer *rand;
/* pick a random buffer */
rand =
filter->planetable[(filter->current_plane +
(fastrand () >> 24)) & (filter->planes - 1)];
dest[area] = (rand ? ((guint32 *) GST_BUFFER_DATA (rand))[area] : 0);
}
gst_pad_push (filter->srcpad, GST_DATA (outbuf));
filter->current_plane--;
if (filter->current_plane < 0)
filter->current_plane = filter->planes - 1;
}
static GstElementStateReturn
gst_quarktv_change_state (GstElement * element)
{
GstQuarkTV *filter = GST_QUARKTV (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_PAUSED_TO_READY:
{
gint i;
for (i = 0; i < filter->planes; i++) {
if (filter->planetable[i])
gst_buffer_unref (filter->planetable[i]);
filter->planetable[i] = NULL;
}
g_free (filter->planetable);
filter->planetable = NULL;
break;
}
default:
break;
}
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
}
static void
gst_quarktv_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstQuarkTV *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_QUARKTV (object));
filter = GST_QUARKTV (object);
switch (prop_id) {
case ARG_PLANES:
{
gint new_n_planes = g_value_get_int (value);
GstBuffer **new_planetable;
gint i;
/* If the number of planes changed, copy across any existing planes */
if (new_n_planes != filter->planes) {
new_planetable =
(GstBuffer **) g_malloc (new_n_planes * sizeof (GstBuffer *));
for (i = 0; (i < new_n_planes) && (i < filter->planes); i++) {
new_planetable[i] = filter->planetable[i];
}
for (; i < filter->planes; i++) {
if (filter->planetable[i])
gst_buffer_unref (filter->planetable[i]);
}
g_free (filter->planetable);
filter->planetable = new_planetable;
filter->current_plane = filter->planes - 1;
filter->planes = new_n_planes;
}
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_quarktv_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstQuarkTV *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_QUARKTV (object));
filter = GST_QUARKTV (object);
switch (prop_id) {
case ARG_PLANES:
g_value_set_int (value, filter->planes);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}