Adds new elements cvdilate and cverode

Adds 2 similar elements (so similar they have their own baseclass),
cvdilate and cverode.

ext/opencv/basicfilters/Makefile.am

@@ -1,7 +1,10 @@
 noinst_LTLIBRARIES = libgstbasicfilters.la
 
 # sources used to compile this plug-in
-libgstbasicfilters_la_SOURCES = gstcvsmooth.c
+libgstbasicfilters_la_SOURCES = gstcvsmooth.c \
+    gstcvdilateerode.c \
+    gstcvdilate.c \
+    gstcverode.c
 
 # flags used to compile this pyramidsegment
 # add other _CFLAGS and _LIBS as needed
@@ -10,4 +13,7 @@ libgstbasicfilters_la_LIBADD = $(GST_LIBS) $(OPENCV_LIBS)
 libgstbasicfilters_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 
 # headers we need but don't want installed
-noinst_HEADERS = gstcvsmooth.h
+noinst_HEADERS = gstcvsmooth.h \
+                 gstcvdilateerode.h \
+                 gstcvdilate.h \
+                 gstcverode.h

ext/opencv/basicfilters/gstcvdilate.c

@@ -0,0 +1,130 @@
+/*
+ * GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ * 
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <gst/gst.h>
+
+#include "gstcvdilate.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_cv_dilate_debug);
+#define GST_CAT_DEFAULT gst_cv_dilate_debug
+
+GST_BOILERPLATE (GstCvDilate, gst_cv_dilate, GstCvDilateErode,
+    GST_TYPE_CV_DILATE_ERODE);
+
+static GstFlowReturn gst_cv_dilate_transform_ip (GstOpencvBaseTransform *
+    filter, GstBuffer * buf, IplImage * img);
+static GstFlowReturn gst_cv_dilate_transform (GstOpencvBaseTransform * filter,
+    GstBuffer * buf, IplImage * img, GstBuffer * outbuf, IplImage * outimg);
+
+/* GObject vmethod implementations */
+static void
+gst_cv_dilate_base_init (gpointer gclass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+  gst_element_class_set_details_simple (element_class,
+      "cvdilate",
+      "Transform/Effect/Video",
+      "Applies cvDilate OpenCV function to the image",
+      "Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
+}
+
+/* initialize the cvdilate's class */
+static void
+gst_cv_dilate_class_init (GstCvDilateClass * klass)
+{
+  GstOpencvBaseTransformClass *gstopencvbasefilter_class;
+
+  gstopencvbasefilter_class = (GstOpencvBaseTransformClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gstopencvbasefilter_class->cv_trans_ip_func = gst_cv_dilate_transform_ip;
+  gstopencvbasefilter_class->cv_trans_func = gst_cv_dilate_transform;
+}
+
+/* initialize the new element
+ * instantiate pads and add them to element
+ * set pad calback functions
+ * initialize instance structure
+ */
+static void
+gst_cv_dilate_init (GstCvDilate * filter, GstCvDilateClass * gclass)
+{
+}
+
+static GstFlowReturn
+gst_cv_dilate_transform (GstOpencvBaseTransform * base, GstBuffer * buf,
+    IplImage * img, GstBuffer * outbuf, IplImage * outimg)
+{
+  GstCvDilateErode *filter = GST_CV_DILATE_ERODE (base);
+
+  /* TODO support kernel as a parameter */
+  cvDilate (img, outimg, NULL, filter->iterations);
+
+  return GST_FLOW_OK;
+}
+
+static GstFlowReturn
+gst_cv_dilate_transform_ip (GstOpencvBaseTransform * base, GstBuffer * buf,
+    IplImage * img)
+{
+  GstCvDilateErode *filter = GST_CV_DILATE_ERODE (base);
+
+  cvDilate (img, img, NULL, filter->iterations);
+
+  return GST_FLOW_OK;
+}
+
+gboolean
+gst_cv_dilate_plugin_init (GstPlugin * plugin)
+{
+  GST_DEBUG_CATEGORY_INIT (gst_cv_dilate_debug, "cvdilate", 0, "cvdilate");
+
+  return gst_element_register (plugin, "cvdilate", GST_RANK_NONE,
+      GST_TYPE_CV_DILATE);
+}

ext/opencv/basicfilters/gstcvdilate.h

@@ -0,0 +1,84 @@
+/*
+ * GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ * 
+ * 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.
+ */
+
+#ifndef __GST_CV_DILATE_H__
+#define __GST_CV_DILATE_H__
+
+#include <gst/gst.h>
+#include <cv.h>
+#include "gstcvdilateerode.h"
+
+G_BEGIN_DECLS
+
+/* #defines don't like whitespacey bits */
+#define GST_TYPE_CV_DILATE \
+  (gst_cv_dilate_get_type())
+#define GST_CV_DILATE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CV_DILATE,GstCvDilate))
+#define GST_CV_DILATE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CV_DILATE,GstCvDilateClass))
+#define GST_IS_CV_DILATE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CV_DILATE))
+#define GST_IS_CV_DILATE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CV_DILATE))
+
+typedef struct _GstCvDilate      GstCvDilate;
+typedef struct _GstCvDilateClass GstCvDilateClass;
+
+struct _GstCvDilate
+{
+  GstCvDilateErode element;
+};
+
+struct _GstCvDilateClass 
+{
+  GstCvDilateErodeClass parent_class;
+};
+
+GType gst_cv_dilate_get_type (void);
+
+gboolean gst_cv_dilate_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_CV_DILATE_H__ */

ext/opencv/basicfilters/gstcvdilateerode.c

@@ -0,0 +1,221 @@
+/*
+ * GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ * 
+ * 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.
+ */
+
+/*
+ * As cvdilate_erode and cverode are all the same, except for the transform function,
+ * we hope this base class should keep maintenance easier.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <gst/gst.h>
+
+#include "gstcvdilateerode.h"
+
+/*
+GST_DEBUG_CATEGORY_STATIC (gst_cv_dilate_erode_debug);
+#define GST_CAT_DEFAULT gst_cv_dilate_erode_debug
+*/
+
+static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-raw-rgb, depth=(int)24, bpp=(int)24;"
+        "video/x-raw-gray")
+    );
+
+static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-raw-rgb, depth=(int)24, bpp=(int)24;"
+        "video/x-raw-gray")
+    );
+
+/* Filter signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+enum
+{
+  PROP_0,
+  PROP_ITERATIONS,
+};
+
+#define DEFAULT_ITERATIONS 1
+
+static GstElementClass *parent_class = NULL;
+
+static void gst_cv_dilate_erode_base_init (gpointer gclass);
+static void gst_cv_dilate_erode_class_init (GstCvDilateErodeClass * klass);
+static void gst_cv_dilate_erode_init (GstCvDilateErode * filter,
+    GstCvDilateErodeClass * gclass);
+
+static void gst_cv_dilate_erode_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_cv_dilate_erode_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+GType
+gst_cv_dilate_erode_get_type (void)
+{
+  static volatile gsize opencv_dilate_erode_type = 0;
+
+  if (g_once_init_enter (&opencv_dilate_erode_type)) {
+    GType _type;
+    static const GTypeInfo opencv_dilate_erode_info = {
+      sizeof (GstCvDilateErodeClass),
+      (GBaseInitFunc) gst_cv_dilate_erode_base_init,
+      NULL,
+      (GClassInitFunc) gst_cv_dilate_erode_class_init,
+      NULL,
+      NULL,
+      sizeof (GstCvDilateErode),
+      0,
+      (GInstanceInitFunc) gst_cv_dilate_erode_init,
+    };
+
+    _type = g_type_register_static (GST_TYPE_OPENCV_BASE_TRANSFORM,
+        "GstCvDilateErode", &opencv_dilate_erode_info,
+        G_TYPE_FLAG_ABSTRACT);
+/*
+    GST_DEBUG_CATEGORY_INIT (gst_cv_dilate_erode_debug, "cvdilateerode", 0,
+        "cvdilateerode");
+*/
+    g_once_init_leave (&opencv_dilate_erode_type, _type);
+  }
+  return opencv_dilate_erode_type;
+}
+
+/* Clean up */
+static void
+gst_cv_dilate_erode_finalize (GObject * obj)
+{
+  G_OBJECT_CLASS (parent_class)->finalize (obj);
+}
+
+
+/* GObject vmethod implementations */
+
+static void
+gst_cv_dilate_erode_base_init (gpointer gclass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+  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 cvdilate_erode's class */
+static void
+gst_cv_dilate_erode_class_init (GstCvDilateErodeClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstOpencvBaseTransformClass *gstopencvbasefilter_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstopencvbasefilter_class = (GstOpencvBaseTransformClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_cv_dilate_erode_finalize);
+  gobject_class->set_property = gst_cv_dilate_erode_set_property;
+  gobject_class->get_property = gst_cv_dilate_erode_get_property;
+
+  g_object_class_install_property (gobject_class, PROP_ITERATIONS,
+      g_param_spec_int ("iterations", "iterations",
+          "Number of iterations to run the algorithm", 1, G_MAXINT,
+          DEFAULT_ITERATIONS, 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_cv_dilate_erode_init (GstCvDilateErode * filter,
+    GstCvDilateErodeClass * gclass)
+{
+  filter->iterations = DEFAULT_ITERATIONS;
+  gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), TRUE);
+}
+
+static void
+gst_cv_dilate_erode_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstCvDilateErode *filter = GST_CV_DILATE_ERODE (object);
+
+  switch (prop_id) {
+    case PROP_ITERATIONS:
+      filter->iterations = g_value_get_int (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_cv_dilate_erode_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstCvDilateErode *filter = GST_CV_DILATE_ERODE (object);
+
+  switch (prop_id) {
+    case PROP_ITERATIONS:
+      g_value_set_int (value, filter->iterations);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}

ext/opencv/basicfilters/gstcvdilateerode.h

@@ -0,0 +1,84 @@
+/*
+ * GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ * 
+ * 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.
+ */
+
+#ifndef __GST_CV_DILATE_ERODE_H__
+#define __GST_CV_DILATE_ERODE_H__
+
+#include <gst/gst.h>
+#include <cv.h>
+#include <gstopencvbasetrans.h>
+
+G_BEGIN_DECLS
+
+/* #defines don't like whitespacey bits */
+#define GST_TYPE_CV_DILATE_ERODE \
+  (gst_cv_dilate_erode_get_type())
+#define GST_CV_DILATE_ERODE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CV_DILATE_ERODE,GstCvDilateErode))
+#define GST_CV_DILATE_ERODE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CV_DILATE_ERODE,GstCvDilateErodeClass))
+#define GST_IS_CV_DILATE_ERODE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CV_DILATE_ERODE))
+#define GST_IS_CV_DILATE_ERODE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CV_DILATE_ERODE))
+
+typedef struct _GstCvDilateErode      GstCvDilateErode;
+typedef struct _GstCvDilateErodeClass GstCvDilateErodeClass;
+
+struct _GstCvDilateErode
+{
+  GstOpencvBaseTransform element;
+
+  gint iterations;
+};
+
+struct _GstCvDilateErodeClass 
+{
+  GstOpencvBaseTransformClass parent_class;
+};
+
+GType gst_cv_dilate_erode_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_CV_DILATE_ERODE_H__ */

ext/opencv/basicfilters/gstcverode.c

@@ -0,0 +1,130 @@
+/*
+ * GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ * 
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <gst/gst.h>
+
+#include "gstcverode.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_cv_erode_debug);
+#define GST_CAT_DEFAULT gst_cv_erode_debug
+
+GST_BOILERPLATE (GstCvErode, gst_cv_erode, GstCvDilateErode,
+    GST_TYPE_CV_DILATE_ERODE);
+
+static GstFlowReturn gst_cv_erode_transform_ip (GstOpencvBaseTransform *
+    filter, GstBuffer * buf, IplImage * img);
+static GstFlowReturn gst_cv_erode_transform (GstOpencvBaseTransform * filter,
+    GstBuffer * buf, IplImage * img, GstBuffer * outbuf, IplImage * outimg);
+
+/* GObject vmethod implementations */
+static void
+gst_cv_erode_base_init (gpointer gclass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+  gst_element_class_set_details_simple (element_class,
+      "cverode",
+      "Transform/Effect/Video",
+      "Applies cvErode OpenCV function to the image",
+      "Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
+}
+
+/* initialize the cverode's class */
+static void
+gst_cv_erode_class_init (GstCvErodeClass * klass)
+{
+  GstOpencvBaseTransformClass *gstopencvbasefilter_class;
+
+  gstopencvbasefilter_class = (GstOpencvBaseTransformClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gstopencvbasefilter_class->cv_trans_ip_func = gst_cv_erode_transform_ip;
+  gstopencvbasefilter_class->cv_trans_func = gst_cv_erode_transform;
+}
+
+/* initialize the new element
+ * instantiate pads and add them to element
+ * set pad calback functions
+ * initialize instance structure
+ */
+static void
+gst_cv_erode_init (GstCvErode * filter, GstCvErodeClass * gclass)
+{
+}
+
+static GstFlowReturn
+gst_cv_erode_transform (GstOpencvBaseTransform * base, GstBuffer * buf,
+    IplImage * img, GstBuffer * outbuf, IplImage * outimg)
+{
+  GstCvDilateErode *filter = GST_CV_DILATE_ERODE (base);
+
+  /* TODO support kernel as a parameter */
+  cvErode (img, outimg, NULL, filter->iterations);
+
+  return GST_FLOW_OK;
+}
+
+static GstFlowReturn
+gst_cv_erode_transform_ip (GstOpencvBaseTransform * base, GstBuffer * buf,
+    IplImage * img)
+{
+  GstCvDilateErode *filter = GST_CV_DILATE_ERODE (base);
+
+  cvErode (img, img, NULL, filter->iterations);
+
+  return GST_FLOW_OK;
+}
+
+gboolean
+gst_cv_erode_plugin_init (GstPlugin * plugin)
+{
+  GST_DEBUG_CATEGORY_INIT (gst_cv_erode_debug, "cverode", 0, "cverode");
+
+  return gst_element_register (plugin, "cverode", GST_RANK_NONE,
+      GST_TYPE_CV_ERODE);
+}

ext/opencv/basicfilters/gstcverode.h

@@ -0,0 +1,84 @@
+/*
+ * GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ * 
+ * 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.
+ */
+
+#ifndef __GST_CV_ERODE_H__
+#define __GST_CV_ERODE_H__
+
+#include <gst/gst.h>
+#include <cv.h>
+#include "gstcvdilateerode.h"
+
+G_BEGIN_DECLS
+
+/* #defines don't like whitespacey bits */
+#define GST_TYPE_CV_ERODE \
+  (gst_cv_erode_get_type())
+#define GST_CV_ERODE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CV_ERODE,GstCvErode))
+#define GST_CV_ERODE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CV_ERODE,GstCvErodeClass))
+#define GST_IS_CV_ERODE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CV_ERODE))
+#define GST_IS_CV_ERODE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CV_ERODE))
+
+typedef struct _GstCvErode      GstCvErode;
+typedef struct _GstCvErodeClass GstCvErodeClass;
+
+struct _GstCvErode
+{
+  GstCvDilateErode element;
+};
+
+struct _GstCvErodeClass 
+{
+  GstCvDilateErodeClass parent_class;
+};
+
+GType gst_cv_erode_get_type (void);
+
+gboolean gst_cv_erode_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_CV_ERODE_H__ */

ext/opencv/gstopencv.c

@@ -23,6 +23,8 @@
 #include "config.h"
 #endif
 
+#include "gstcvdilate.h"
+#include "gstcverode.h"
 #include "gstcvsmooth.h"
 #include "gstedgedetect.h"
 #include "gstfaceblur.h"
@@ -34,6 +36,13 @@
 static gboolean
 plugin_init (GstPlugin * plugin)
 {
+
+  if (!gst_cv_dilate_plugin_init (plugin))
+    return FALSE;
+
+  if (!gst_cv_erode_plugin_init (plugin))
+    return FALSE;
+
   if (!gst_cv_smooth_plugin_init (plugin))
     return FALSE;