ext/opencv/gstpyramidsegment.c - mtk-gst-plugins-bad-debian - Git at Google

 /*
  * 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_MAKE ("RGB"))
     );

 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGB"))
     );

 G_DEFINE_TYPE (GstPyramidSegment, gst_pyramid_segment, 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_handle_sink_event (GstPad * pad,
     GstObject * parent, GstEvent * event);
 static GstFlowReturn gst_pyramid_segment_chain (GstPad * pad,
     GstObject * parent, 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 (gst_pyramid_segment_parent_class)->finalize (obj);
 }


 /* initialize the pyramidsegment's class */
 static void
 gst_pyramid_segment_class_init (GstPyramidSegmentClass * klass)
 {
   GObjectClass *gobject_class;

   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
   gobject_class = (GObjectClass *) 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));

   gst_element_class_set_metadata (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 new element
  * instantiate pads and add them to element
  * set pad calback functions
  * initialize instance structure
  */
 static void
 gst_pyramid_segment_init (GstPyramidSegment * filter)
 {
   filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
   GST_PAD_SET_PROXY_CAPS (filter->sinkpad);

   gst_pad_set_event_function (filter->sinkpad,
       GST_DEBUG_FUNCPTR (gst_pyramid_segment_handle_sink_event));
   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_PROXY_CAPS (filter->srcpad);

   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_handle_sink_event (GstPad * pad, GstObject * parent,
     GstEvent * event)
 {
   GstPyramidSegment *filter;
   GstVideoInfo info;
   gboolean res = TRUE;
   filter = GST_PYRAMID_SEGMENT (parent);

   switch (GST_EVENT_TYPE (event)) {
     case GST_EVENT_CAPS:
     {
       GstCaps *caps;
       gst_event_parse_caps (event, &caps);
       gst_video_info_from_caps (&info, caps);

       filter->cvImage =
           cvCreateImage (cvSize (info.width, info.height), IPL_DEPTH_8U, 3);
       break;
     }
     default:
       break;
   }

   res = gst_pad_event_default (pad, parent, event);

   return res;
 }

 /* chain function
  * this function does the actual processing
  */
 static GstFlowReturn
 gst_pyramid_segment_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
 {
   GstPyramidSegment *filter;
   GstBuffer *outbuf;
   GstMapInfo info;
   GstMapInfo outinfo;

   filter = GST_PYRAMID_SEGMENT (GST_OBJECT_PARENT (pad));

   buf = gst_buffer_make_writable (buf);
   gst_buffer_map (buf, &info, GST_MAP_READWRITE);
   filter->cvImage->imageData = (char *) info.data;
   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_into (outbuf, buf, GST_BUFFER_COPY_METADATA, 0, -1);
   gst_buffer_map (outbuf, &outinfo, GST_MAP_WRITE);
   memcpy (outinfo.data, filter->cvSegmentedImage->imageData,
       gst_buffer_get_size (outbuf));

   gst_buffer_unmap (buf, &info);
   gst_buffer_unref (buf);
   cvReleaseImage (&filter->cvSegmentedImage);
   g_assert (filter->cvSegmentedImage == NULL);

   gst_buffer_unmap (outbuf, &outinfo);
   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);
 }
	/*
	* 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_MAKE ("RGB"))
	);

	static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGB"))
	);

	G_DEFINE_TYPE (GstPyramidSegment, gst_pyramid_segment, 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_handle_sink_event (GstPad * pad,
	GstObject * parent, GstEvent * event);
	static GstFlowReturn gst_pyramid_segment_chain (GstPad * pad,
	GstObject * parent, 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 (gst_pyramid_segment_parent_class)->finalize (obj);
	}



	/* initialize the pyramidsegment's class */
	static void
	gst_pyramid_segment_class_init (GstPyramidSegmentClass * klass)
	{
	GObjectClass *gobject_class;

	GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
	gobject_class = (GObjectClass *) 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));

	gst_element_class_set_metadata (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 new element
	* instantiate pads and add them to element
	* set pad calback functions
	* initialize instance structure
	*/
	static void
	gst_pyramid_segment_init (GstPyramidSegment * filter)
	{
	filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
	GST_PAD_SET_PROXY_CAPS (filter->sinkpad);

	gst_pad_set_event_function (filter->sinkpad,
	GST_DEBUG_FUNCPTR (gst_pyramid_segment_handle_sink_event));
	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_PROXY_CAPS (filter->srcpad);

	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_handle_sink_event (GstPad * pad, GstObject * parent,
	GstEvent * event)
	{
	GstPyramidSegment *filter;
	GstVideoInfo info;
	gboolean res = TRUE;
	filter = GST_PYRAMID_SEGMENT (parent);

	switch (GST_EVENT_TYPE (event)) {
	case GST_EVENT_CAPS:
	{
	GstCaps *caps;
	gst_event_parse_caps (event, &caps);
	gst_video_info_from_caps (&info, caps);

	filter->cvImage =
	cvCreateImage (cvSize (info.width, info.height), IPL_DEPTH_8U, 3);
	break;
	}
	default:
	break;
	}

	res = gst_pad_event_default (pad, parent, event);

	return res;
	}

	/* chain function
	* this function does the actual processing
	*/
	static GstFlowReturn
	gst_pyramid_segment_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
	{
	GstPyramidSegment *filter;
	GstBuffer *outbuf;
	GstMapInfo info;
	GstMapInfo outinfo;

	filter = GST_PYRAMID_SEGMENT (GST_OBJECT_PARENT (pad));

	buf = gst_buffer_make_writable (buf);
	gst_buffer_map (buf, &info, GST_MAP_READWRITE);
	filter->cvImage->imageData = (char *) info.data;
	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_into (outbuf, buf, GST_BUFFER_COPY_METADATA, 0, -1);
	gst_buffer_map (outbuf, &outinfo, GST_MAP_WRITE);
	memcpy (outinfo.data, filter->cvSegmentedImage->imageData,
	gst_buffer_get_size (outbuf));

	gst_buffer_unmap (buf, &info);
	gst_buffer_unref (buf);
	cvReleaseImage (&filter->cvSegmentedImage);
	g_assert (filter->cvSegmentedImage == NULL);

	gst_buffer_unmap (outbuf, &outinfo);
	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);
	}