gstreamer/gst/smooth/gstsmooth.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 <string.h>
#include <gstsmooth.h>
#include <gst/video/video.h>
/* elementfactory information */
static GstElementDetails smooth_details = {
"Smooth effect",
"Filter/Effect/Video",
"Apply a smooth filter to an image",
"Wim Taymans <wim.taymans@chello.be>"
};
/* Smooth signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_ACTIVE,
ARG_TOLERANCE,
ARG_FILTERSIZE,
ARG_LUM_ONLY
};
static GstStaticPadTemplate gst_smooth_src_template =
GST_STATIC_PAD_TEMPLATE (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
GST_VIDEO_YUV_PAD_TEMPLATE_CAPS("I420")
)
);
static GstStaticPadTemplate gst_smooth_sink_template =
GST_STATIC_PAD_TEMPLATE (
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
GST_VIDEO_YUV_PAD_TEMPLATE_CAPS("I420")
)
);
static void gst_smooth_class_init (GstSmoothClass *klass);
static void gst_smooth_base_init (GstSmoothClass *klass);
static void gst_smooth_init (GstSmooth *smooth);
static void gst_smooth_chain (GstPad *pad, GstData *_data);
static void smooth_filter (unsigned char* dest, unsigned char* src,
int width, int height, int tolerance, int filtersize);
static void gst_smooth_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_smooth_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static GstElementClass *parent_class = NULL;
/*static guint gst_smooth_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_smooth_get_type (void)
{
static GType smooth_type = 0;
if (!smooth_type) {
static const GTypeInfo smooth_info = {
sizeof(GstSmoothClass),
(GBaseInitFunc)gst_smooth_base_init,
NULL,
(GClassInitFunc)gst_smooth_class_init,
NULL,
NULL,
sizeof(GstSmooth),
0,
(GInstanceInitFunc)gst_smooth_init,
};
smooth_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSmooth", &smooth_info, 0);
}
return smooth_type;
}
static void
gst_smooth_base_init (GstSmoothClass *klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_smooth_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_smooth_src_template));
gst_element_class_set_details (element_class, &smooth_details);
}
static void
gst_smooth_class_init (GstSmoothClass *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_ACTIVE,
g_param_spec_boolean("active","active","active",
TRUE,G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_TOLERANCE,
g_param_spec_int("tolerance","tolerance","tolerance",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FILTERSIZE,
g_param_spec_int("filtersize","filtersize","filtersize",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */
gobject_class->set_property = gst_smooth_set_property;
gobject_class->get_property = gst_smooth_get_property;
}
static GstPadLinkReturn
gst_smooth_link (GstPad *pad, const GstCaps *caps)
{
GstSmooth *filter;
GstStructure *structure;
gboolean ret;
filter = GST_SMOOTH (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "width", &filter->width);
ret &= gst_structure_get_int (structure, "height", &filter->height);
if (!ret) return GST_PAD_LINK_REFUSED;
return gst_pad_try_set_caps (filter->srcpad, caps);
}
static void
gst_smooth_init (GstSmooth *smooth)
{
smooth->sinkpad = gst_pad_new_from_template (
gst_static_pad_template_get (&gst_smooth_sink_template), "sink");
gst_pad_set_link_function (smooth->sinkpad, gst_smooth_link);
gst_pad_set_chain_function (smooth->sinkpad, gst_smooth_chain);
gst_element_add_pad (GST_ELEMENT (smooth), smooth->sinkpad);
smooth->srcpad = gst_pad_new_from_template (
gst_static_pad_template_get (&gst_smooth_sink_template), "src");
gst_pad_set_link_function (smooth->srcpad, gst_smooth_link);
gst_element_add_pad (GST_ELEMENT (smooth), smooth->srcpad);
smooth->active = TRUE;
smooth->tolerance = 8;
smooth->filtersize = 3;
smooth->lum_only = TRUE;
}
static void
smooth_filter (unsigned char* dest, unsigned char* src, int width, int height, int tolerance, int filtersize)
{
int refval, aktval, upperval, lowerval, numvalues, sum;
int x, y, fx, fy, fy1, fy2, fx1, fx2;
unsigned char *srcp = src;
fy1 = 0;
fy2 = MIN(filtersize+1, height) * width;
for(y = 0; y < height; y++)
{
if (y>(filtersize+1)) fy1 += width;
if (y<height-(filtersize+1)) fy2 += width;
for(x = 0; x < width; x++)
{
refval = *src;
upperval = refval + tolerance;
lowerval = refval - tolerance;
numvalues = 1;
sum = refval;
fx1 = MAX(x-filtersize, 0) + fy1;
fx2 = MIN(x+filtersize+1, width) + fy1;
for (fy = fy1; fy<fy2; fy+=width)
{
for (fx = fx1; fx<fx2; fx++)
{
aktval = srcp[fx];
if ((lowerval-aktval)*(upperval-aktval)<0)
{
numvalues ++;
sum += aktval;
}
} /*for fx */
fx1 += width;
fx2 += width;
} /*for fy */
src++;
*dest++ = sum/numvalues;
}
}
}
static void
gst_smooth_chain (GstPad *pad, GstData *_data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstSmooth *smooth;
guchar *data;
gulong size;
GstBuffer *outbuf;
gint lumsize, chromsize;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
smooth = GST_SMOOTH (GST_OBJECT_PARENT (pad));
if (!smooth->active) {
gst_pad_push(smooth->srcpad,GST_DATA (buf));
return;
}
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
GST_DEBUG ("smooth: have buffer of %d", GST_BUFFER_SIZE (buf));
outbuf = gst_buffer_new();
GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (buf));
GST_BUFFER_SIZE (outbuf) = GST_BUFFER_SIZE (buf);
lumsize = smooth->width*smooth->height;
chromsize = lumsize/4;
smooth_filter (GST_BUFFER_DATA (outbuf), data, smooth->width, smooth->height,
smooth->tolerance, smooth->filtersize);
if (!smooth->lum_only) {
smooth_filter (GST_BUFFER_DATA (outbuf)+lumsize, data+lumsize, smooth->width/2, smooth->height/2,
smooth->tolerance, smooth->filtersize/2);
smooth_filter (GST_BUFFER_DATA (outbuf)+lumsize+chromsize, data+lumsize+chromsize, smooth->width/2,
smooth->height/2, smooth->tolerance, smooth->filtersize/2);
}
else {
memcpy (GST_BUFFER_DATA (outbuf)+lumsize, data+lumsize, chromsize*2);
}
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
gst_buffer_unref (buf);
gst_pad_push (smooth->srcpad, GST_DATA (outbuf));
}
static void
gst_smooth_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstSmooth *smooth;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_SMOOTH(object));
smooth = GST_SMOOTH(object);
switch (prop_id) {
case ARG_ACTIVE:
smooth->active = g_value_get_boolean (value);
break;
case ARG_TOLERANCE:
smooth->tolerance = g_value_get_int (value);
break;
case ARG_FILTERSIZE:
smooth->filtersize = g_value_get_int (value);
break;
case ARG_LUM_ONLY:
smooth->lum_only = g_value_get_boolean (value);
break;
default:
break;
}
}
static void
gst_smooth_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstSmooth *smooth;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_SMOOTH(object));
smooth = GST_SMOOTH(object);
switch (prop_id) {
case ARG_ACTIVE:
g_value_set_boolean (value, smooth->active);
break;
case ARG_TOLERANCE:
g_value_set_int (value, smooth->tolerance);
break;
case ARG_FILTERSIZE:
g_value_set_int (value, smooth->filtersize);
break;
case ARG_LUM_ONLY:
g_value_set_boolean (value, smooth->lum_only);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin *plugin)
{
return gst_element_register(plugin, "smooth",
GST_RANK_NONE, GST_TYPE_SMOOTH);
}
GST_PLUGIN_DEFINE (
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"smooth",
"Apply a smooth filter to an image",
plugin_init,
VERSION,
"LGPL",
GST_PACKAGE,
GST_ORIGIN
)