gstreamer/gst/effectv/gstquark.c
Tim-Philipp Müller 59c1122481 gst/effectv/gstquark.c: Add some NULL pointer checks (possibly related to #385623).
Original commit message from CVS:
* gst/effectv/gstquark.c: (gst_quarktv_transform),
(gst_quarktv_planetable_clear):
Add some NULL pointer checks (possibly related to #385623).
2006-12-14 14:25:17 +00:00

379 lines
9.5 KiB
C

/* 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 <gst/video/gstvideofilter.h>
#include <math.h>
#include <string.h>
#include <gst/video/video.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(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QUARKTV))
/* number of frames of time-buffer. It should be as a configurable paramater */
/* This number also must be 2^n just for the speed. */
#define PLANES 16
typedef struct _GstQuarkTV GstQuarkTV;
typedef struct _GstQuarkTVClass GstQuarkTVClass;
struct _GstQuarkTV
{
GstVideoFilter element;
gint width, height;
gint area;
gint planes;
gint current_plane;
GstBuffer **planetable;
};
struct _GstQuarkTVClass
{
GstVideoFilterClass parent_class;
};
enum
{
ARG_0,
ARG_PLANES
};
GType gst_quarktv_get_type (void);
static void gst_quarktv_planetable_clear (GstQuarkTV * filter);
static const GstElementDetails quarktv_details =
GST_ELEMENT_DETAILS ("QuarkTV effect",
"Filter/Effect/Video",
"Motion dissolver",
"FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>");
static GstStaticPadTemplate gst_quarktv_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_RGBx)
);
static GstStaticPadTemplate gst_quarktv_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_RGBx)
);
static GstVideoFilterClass *parent_class = NULL;
static gboolean
gst_quarktv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstCaps * outcaps)
{
GstQuarkTV *filter = GST_QUARKTV (btrans);
GstStructure *structure;
gboolean ret = FALSE;
structure = gst_caps_get_structure (incaps, 0);
if (gst_structure_get_int (structure, "width", &filter->width) &&
gst_structure_get_int (structure, "height", &filter->height)) {
gst_quarktv_planetable_clear (filter);
filter->area = filter->width * filter->height;
ret = TRUE;
}
return ret;
}
static gboolean
gst_quarktv_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
guint * size)
{
GstQuarkTV *filter;
GstStructure *structure;
gboolean ret = FALSE;
gint width, height;
filter = GST_QUARKTV (btrans);
structure = gst_caps_get_structure (caps, 0);
if (gst_structure_get_int (structure, "width", &width) &&
gst_structure_get_int (structure, "height", &height)) {
*size = width * height * 32 / 8;
ret = TRUE;
GST_DEBUG_OBJECT (filter, "our frame size is %d bytes (%dx%d)", *size,
width, height);
}
return ret;
}
static inline guint32
fastrand (void)
{
static unsigned int fastrand_val;
return (fastrand_val = fastrand_val * 1103515245 + 12345);
}
static GstFlowReturn
gst_quarktv_transform (GstBaseTransform * trans, GstBuffer * in,
GstBuffer * out)
{
GstQuarkTV *filter;
gint area;
guint32 *src, *dest;
GstFlowReturn ret = GST_FLOW_OK;
filter = GST_QUARKTV (trans);
gst_buffer_stamp (out, in);
area = filter->area;
src = (guint32 *) GST_BUFFER_DATA (in);
dest = (guint32 *) GST_BUFFER_DATA (out);
if (G_UNLIKELY (filter->planetable == NULL))
return GST_FLOW_WRONG_STATE;
if (filter->planetable[filter->current_plane])
gst_buffer_unref (filter->planetable[filter->current_plane]);
filter->planetable[filter->current_plane] = gst_buffer_ref (in);
/* For each pixel */
while (--area) {
GstBuffer *rand;
/* pick a random buffer */
rand =
filter->planetable[(filter->current_plane +
(fastrand () >> 24)) & (filter->planes - 1)];
/* Copy the pixel from the random buffer to dest */
dest[area] = (rand ? ((guint32 *) GST_BUFFER_DATA (rand))[area] : 0);
}
filter->current_plane--;
if (filter->current_plane < 0)
filter->current_plane = filter->planes - 1;
return ret;
}
static void
gst_quarktv_planetable_clear (GstQuarkTV * filter)
{
gint i;
if (filter->planetable == NULL)
return;
for (i = 0; i < filter->planes; i++) {
if (GST_IS_BUFFER (filter->planetable[i])) {
gst_buffer_unref (filter->planetable[i]);
}
filter->planetable[i] = NULL;
}
}
static GstStateChangeReturn
gst_quarktv_change_state (GstElement * element, GstStateChange transition)
{
GstQuarkTV *filter = GST_QUARKTV (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
{
filter->planetable =
(GstBuffer **) g_malloc0 (filter->planes * sizeof (GstBuffer *));
break;
}
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
{
gst_quarktv_planetable_clear (filter);
g_free (filter->planetable);
filter->planetable = NULL;
break;
}
default:
break;
}
return ret;
}
static void
gst_quarktv_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstQuarkTV *filter;
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;
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;
}
}
static void
gst_quarktv_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &quarktv_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_quarktv_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_quarktv_src_template));
}
static void
gst_quarktv_class_init (gpointer klass, gpointer class_data)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstBaseTransformClass *trans_class;
gobject_class = (GObjectClass *) klass;
element_class = (GstElementClass *) klass;
trans_class = (GstBaseTransformClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_quarktv_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_quarktv_get_property);
element_class->change_state = GST_DEBUG_FUNCPTR (gst_quarktv_change_state);
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_quarktv_set_caps);
trans_class->get_unit_size = GST_DEBUG_FUNCPTR (gst_quarktv_get_unit_size);
trans_class->transform = GST_DEBUG_FUNCPTR (gst_quarktv_transform);
}
static void
gst_quarktv_init (GTypeInstance * instance, gpointer g_class)
{
GstQuarkTV *filter = GST_QUARKTV (instance);
filter->planes = PLANES;
filter->current_plane = filter->planes - 1;
}
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,
gst_quarktv_class_init,
NULL,
NULL,
sizeof (GstQuarkTV),
0,
gst_quarktv_init,
};
quarktv_type = g_type_register_static (GST_TYPE_VIDEO_FILTER,
"GstQuarkTV", &quarktv_info, 0);
}
return quarktv_type;
}