gstreamer/ext/opencv/gstpyramidsegment.c
2011-11-18 20:57:31 +01:00

334 lines
11 KiB
C

/*
* GStreamer
* Copyright (C) 2005 Thomas Vander Stichele <thomas@apestaart.org>
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2008 Michael Sheldon <mike@mikeasoft.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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-pyramidsegment
*
* Applies pyramid segmentation to a video or image.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v -m fakesrc ! pyramidsegment ! fakesink silent=TRUE
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include "gstopencvutils.h"
#include "gstpyramidsegment.h"
#define BLOCK_SIZE 1000
GST_DEBUG_CATEGORY_STATIC (gst_pyramid_segment_debug);
#define GST_CAT_DEFAULT gst_pyramid_segment_debug
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_SILENT,
PROP_THRESHOLD1,
PROP_THRESHOLD2,
PROP_LEVEL
};
/* the capabilities of the inputs and outputs.
*
* describe the real formats here.
*/
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB)
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB)
);
GST_BOILERPLATE (GstPyramidSegment, gst_pyramid_segment, GstElement,
GST_TYPE_ELEMENT);
static void gst_pyramid_segment_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_pyramid_segment_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_pyramid_segment_set_caps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_pyramid_segment_chain (GstPad * pad, GstBuffer * buf);
/* Clean up */
static void
gst_pyramid_segment_finalize (GObject * obj)
{
GstPyramidSegment *filter = GST_PYRAMID_SEGMENT (obj);
if (filter->cvImage != NULL) {
cvReleaseImage (&filter->cvImage);
cvReleaseImage (&filter->cvSegmentedImage);
}
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
/* GObject vmethod implementations */
static void
gst_pyramid_segment_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_details_simple (element_class,
"pyramidsegment",
"Filter/Effect/Video",
"Applies pyramid segmentation to a video or image.",
"Michael Sheldon <mike@mikeasoft.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
}
/* initialize the pyramidsegment's class */
static void
gst_pyramid_segment_class_init (GstPyramidSegmentClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_pyramid_segment_finalize);
gobject_class->set_property = gst_pyramid_segment_set_property;
gobject_class->get_property = gst_pyramid_segment_get_property;
g_object_class_install_property (gobject_class, PROP_SILENT,
g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_THRESHOLD1,
g_param_spec_double ("threshold1", "Threshold1",
"Error threshold for establishing links", 0, 1000, 50,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_THRESHOLD2,
g_param_spec_double ("threshold2", "Threshold2",
"Error threshold for segment clustering", 0, 1000, 60,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_LEVEL,
g_param_spec_int ("level", "Level",
"Maximum level of the pyramid segmentation", 0, 4, 4,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
/* initialize the new element
* instantiate pads and add them to element
* set pad calback functions
* initialize instance structure
*/
static void
gst_pyramid_segment_init (GstPyramidSegment * filter,
GstPyramidSegmentClass * gclass)
{
filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_setcaps_function (filter->sinkpad,
GST_DEBUG_FUNCPTR (gst_pyramid_segment_set_caps));
gst_pad_set_getcaps_function (filter->sinkpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
gst_pad_set_chain_function (filter->sinkpad,
GST_DEBUG_FUNCPTR (gst_pyramid_segment_chain));
filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_set_getcaps_function (filter->srcpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
filter->storage = cvCreateMemStorage (BLOCK_SIZE);
filter->comp =
cvCreateSeq (0, sizeof (CvSeq), sizeof (CvPoint), filter->storage);
filter->silent = FALSE;
filter->threshold1 = 50.0;
filter->threshold2 = 60.0;
filter->level = 4;
}
static void
gst_pyramid_segment_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPyramidSegment *filter = GST_PYRAMID_SEGMENT (object);
switch (prop_id) {
case PROP_SILENT:
filter->silent = g_value_get_boolean (value);
break;
case PROP_THRESHOLD1:
filter->threshold1 = g_value_get_double (value);
break;
case PROP_THRESHOLD2:
filter->threshold2 = g_value_get_double (value);
break;
case PROP_LEVEL:
filter->level = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_pyramid_segment_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstPyramidSegment *filter = GST_PYRAMID_SEGMENT (object);
switch (prop_id) {
case PROP_SILENT:
g_value_set_boolean (value, filter->silent);
break;
case PROP_THRESHOLD1:
g_value_set_double (value, filter->threshold1);
break;
case PROP_THRESHOLD2:
g_value_set_double (value, filter->threshold2);
break;
case PROP_LEVEL:
g_value_set_int (value, filter->level);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* GstElement vmethod implementations */
/* this function handles the link with other elements */
static gboolean
gst_pyramid_segment_set_caps (GstPad * pad, GstCaps * caps)
{
GstPyramidSegment *filter;
GstPad *otherpad;
GstStructure *structure;
gint width, height;
filter = GST_PYRAMID_SEGMENT (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &width);
gst_structure_get_int (structure, "height", &height);
filter->cvImage = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3);
otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;
gst_object_unref (filter);
return gst_pad_set_caps (otherpad, caps);
}
/* chain function
* this function does the actual processing
*/
static GstFlowReturn
gst_pyramid_segment_chain (GstPad * pad, GstBuffer * buf)
{
GstPyramidSegment *filter;
GstBuffer *outbuf;
filter = GST_PYRAMID_SEGMENT (GST_OBJECT_PARENT (pad));
filter->cvImage->imageData = (char *) GST_BUFFER_DATA (buf);
filter->cvSegmentedImage = cvCloneImage (filter->cvImage);
cvPyrSegmentation (filter->cvImage, filter->cvSegmentedImage, filter->storage,
&(filter->comp), filter->level, filter->threshold1, filter->threshold2);
/* TODO look if there is a way in opencv to reuse the image data and
* delete only the struct headers. Would avoid a memcpy here */
outbuf = gst_buffer_new_and_alloc (filter->cvSegmentedImage->imageSize);
gst_buffer_copy_metadata (outbuf, buf, GST_BUFFER_COPY_ALL);
memcpy (GST_BUFFER_DATA (outbuf), filter->cvSegmentedImage->imageData,
GST_BUFFER_SIZE (outbuf));
gst_buffer_unref (buf);
cvReleaseImage (&filter->cvSegmentedImage);
g_assert (filter->cvSegmentedImage == NULL);
return gst_pad_push (filter->srcpad, outbuf);
}
/* entry point to initialize the plug-in
* initialize the plug-in itself
* register the element factories and other features
*/
gboolean
gst_pyramid_segment_plugin_init (GstPlugin * plugin)
{
/* debug category for fltering log messages */
GST_DEBUG_CATEGORY_INIT (gst_pyramid_segment_debug, "pyramidsegment",
0, "Applies pyramid segmentation to a video or image");
return gst_element_register (plugin, "pyramidsegment", GST_RANK_NONE,
GST_TYPE_PYRAMID_SEGMENT);
}