gstreamer/gst/effectv/gstquark.c
Sebastian Dröge f0054bcc82 effectv: Don't allow caps changes for some effectv filters
These filters use information from previous frames to
generate the current frame and a caps change will make
the effect start from the beginning again.
2009-07-24 19:54:05 +02:00

292 lines
7.9 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, 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 -v videotestsrc ! quarktv ! ffmpegcolorspace ! 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"
#include <gst/video/video.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
};
GST_BOILERPLATE (GstQuarkTV, gst_quarktv, GstVideoFilter,
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_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
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_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_RGBx)
);
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 GstFlowReturn
gst_quarktv_transform (GstBaseTransform * trans, GstBuffer * in,
GstBuffer * out)
{
GstQuarkTV *filter = GST_QUARKTV (trans);
gint area;
guint32 *src, *dest;
GstFlowReturn ret = GST_FLOW_OK;
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];
/* Copy the pixel from the random buffer to dest */
dest[area] =
(rand ? ((guint32 *) GST_BUFFER_DATA (rand))[area] : src[area]);
}
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 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);
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;
}
}
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_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class, "QuarkTV effect",
"Filter/Effect/Video",
"Motion dissolver", "FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>");
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 (GstQuarkTVClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) 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", 0, 64, PLANES,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_quarktv_set_caps);
trans_class->transform = GST_DEBUG_FUNCPTR (gst_quarktv_transform);
trans_class->start = GST_DEBUG_FUNCPTR (gst_quarktv_start);
}
static void
gst_quarktv_init (GstQuarkTV * filter, GstQuarkTVClass * klass)
{
filter->planes = PLANES;
filter->current_plane = filter->planes - 1;
gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SRC_PAD (filter));
gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SINK_PAD (filter));
}