gstreamer/gst/effectv/gstquark.c
Vineeth T M fb5394dbf0 quarktv: fix "planes" property range, a value of 0 is not allowed
When planes property is set to 0, the pipeline executes in
an infinite loop and never exits. Since planes must never
be 0, set the minimum value in the property description
to 1.

https://bugzilla.gnome.org/show_bug.cgi?id=743906
2015-03-28 11:31:42 +00:00

299 lines
8.2 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* EffecTV:
* Copyright (C) 2001-2002 FUKUCHI Kentarou
*
* QuarkTV - motion disolver.
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-quarktv
*
* QuarkTV disolves moving objects. It picks up pixels from
* the last frames randomly.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 -v videotestsrc ! quarktv ! videoconvert ! autovideosink
* ]| This pipeline shows the effect of quarktv on a test stream.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <string.h>
#include "gstquark.h"
#include "gsteffectv.h"
/* 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
enum
{
PROP_0,
PROP_PLANES
};
#define gst_quarktv_parent_class parent_class
G_DEFINE_TYPE (GstQuarkTV, gst_quarktv, GST_TYPE_VIDEO_FILTER);
static void gst_quarktv_planetable_clear (GstQuarkTV * filter);
static GstStaticPadTemplate gst_quarktv_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ xRGB, xBGR, BGRx, RGBx }"))
);
static GstStaticPadTemplate gst_quarktv_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ xRGB, xBGR, BGRx, RGBx }"))
);
static gboolean
gst_quarktv_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
{
GstQuarkTV *filter = GST_QUARKTV (vfilter);
gint width, height;
width = GST_VIDEO_INFO_WIDTH (in_info);
height = GST_VIDEO_INFO_HEIGHT (in_info);
gst_quarktv_planetable_clear (filter);
filter->area = width * height;
return TRUE;
}
static GstFlowReturn
gst_quarktv_transform_frame (GstVideoFilter * vfilter, GstVideoFrame * in_frame,
GstVideoFrame * out_frame)
{
GstQuarkTV *filter = GST_QUARKTV (vfilter);
gint area;
guint32 *src, *dest;
GstClockTime timestamp;
GstBuffer **planetable;
gint planes, current_plane;
timestamp = GST_BUFFER_TIMESTAMP (in_frame->buffer);
timestamp =
gst_segment_to_stream_time (&GST_BASE_TRANSFORM (vfilter)->segment,
GST_FORMAT_TIME, timestamp);
GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
if (GST_CLOCK_TIME_IS_VALID (timestamp))
gst_object_sync_values (GST_OBJECT (filter), timestamp);
if (G_UNLIKELY (filter->planetable == NULL))
return GST_FLOW_FLUSHING;
src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
GST_OBJECT_LOCK (filter);
area = filter->area;
planetable = filter->planetable;
planes = filter->planes;
current_plane = filter->current_plane;
if (planetable[current_plane])
gst_buffer_unref (planetable[current_plane]);
planetable[current_plane] = gst_buffer_ref (in_frame->buffer);
/* For each pixel */
while (--area) {
GstBuffer *rand;
/* pick a random buffer */
rand = planetable[(current_plane + (fastrand () >> 24)) % planes];
/* Copy the pixel from the random buffer to dest, FIXME, slow */
if (rand)
gst_buffer_extract (rand, area * 4, &dest[area], 4);
else
dest[area] = src[area];
}
filter->current_plane--;
if (filter->current_plane < 0)
filter->current_plane = planes - 1;
GST_OBJECT_UNLOCK (filter);
return GST_FLOW_OK;
}
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 gboolean
gst_quarktv_start (GstBaseTransform * trans)
{
GstQuarkTV *filter = GST_QUARKTV (trans);
if (filter->planetable) {
gst_quarktv_planetable_clear (filter);
g_free (filter->planetable);
}
filter->planetable =
(GstBuffer **) g_malloc0 (filter->planes * sizeof (GstBuffer *));
return TRUE;
}
static void
gst_quarktv_finalize (GObject * object)
{
GstQuarkTV *filter = GST_QUARKTV (object);
if (filter->planetable) {
gst_quarktv_planetable_clear (filter);
g_free (filter->planetable);
filter->planetable = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_quarktv_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstQuarkTV *filter = GST_QUARKTV (object);
GST_OBJECT_LOCK (filter);
switch (prop_id) {
case PROP_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_malloc0 (new_n_planes * sizeof (GstBuffer *));
if (filter->planetable) {
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->planes = new_n_planes;
filter->current_plane = filter->planes - 1;
}
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (filter);
}
static void
gst_quarktv_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstQuarkTV *filter = GST_QUARKTV (object);
switch (prop_id) {
case PROP_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_class_init (GstQuarkTVClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
gobject_class->set_property = gst_quarktv_set_property;
gobject_class->get_property = gst_quarktv_get_property;
gobject_class->finalize = gst_quarktv_finalize;
g_object_class_install_property (gobject_class, PROP_PLANES,
g_param_spec_int ("planes", "Planes",
"Number of planes", 1, 64, PLANES,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
gst_element_class_set_static_metadata (gstelement_class, "QuarkTV effect",
"Filter/Effect/Video",
"Motion dissolver", "FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>");
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_quarktv_sink_template));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_quarktv_src_template));
trans_class->start = GST_DEBUG_FUNCPTR (gst_quarktv_start);
vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_quarktv_set_info);
vfilter_class->transform_frame =
GST_DEBUG_FUNCPTR (gst_quarktv_transform_frame);
}
static void
gst_quarktv_init (GstQuarkTV * filter)
{
filter->planes = PLANES;
filter->current_plane = filter->planes - 1;
}