Initial revision

Original commit message from CVS:
Initial revision

4 files changed, 500 insertions, 0 deletions

diff --git a/gst/median/.gitignore b/gst/median/.gitignore
new file mode 100644
index 00000000..08f5ed37
--- /dev/null
+++ b/gst/median/.gitignore
@@ -0,0 +1,7 @@
+Makefile
+Makefile.in
+*.o
+*.lo
+*.la
+.deps
+.libs
diff --git a/gst/median/Makefile.am b/gst/median/Makefile.am
new file mode 100644
index 00000000..cf75f34f
--- /dev/null
+++ b/gst/median/Makefile.am
@@ -0,0 +1,9 @@
+filterdir = $(libdir)/gst
+
+filter_LTLIBRARIES = libgstmedian.la
+
+libgstmedian_la_SOURCES = gstmedian.c
+
+libgstmedian_la_CFLAGS = -O3 $(FOMIT_FRAME_POINTER) -funroll-all-loops -finline-functions -ffast-math $(GST_CFLAGS)
+
+noinst_HEADERS = gstmedian.h
diff --git a/gst/median/gstmedian.c b/gst/median/gstmedian.c
new file mode 100644
index 00000000..f0e836af
--- /dev/null
+++ b/gst/median/gstmedian.c
@@ -0,0 +1,412 @@
+/* Gnome-Streamer
+ * 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.
+ */
+
+#include <string.h>
+#include <gstmedian.h>
+
+
+static GstElementDetails median_details = {
+  "Median effect",
+  "Filter/Effect",
+  "apply a median filter to an image",
+  VERSION,
+  "Wim Taymans <wim.taymans@chello.be>",
+  "(C) 2000",
+};
+
+GST_PADTEMPLATE_FACTORY (median_src_factory,
+  "src",
+  GST_PAD_SRC,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+   "median_src",
+   "video/raw",
+     "format",   GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
+  )
+)
+
+GST_PADTEMPLATE_FACTORY (median_sink_factory,
+  "sink",
+  GST_PAD_SINK,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+   "median_src",
+   "video/raw",
+     "format",   GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
+  )
+)
+
+
+/* Median signals and args */
+enum {
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  ARG_ACTIVE,
+  ARG_FILTERSIZE,
+  ARG_LUM_ONLY
+};
+
+static GType 	gst_median_get_type 	(void);
+static void	gst_median_class_init	(GstMedianClass *klass);
+static void	gst_median_init		(GstMedian *median);
+
+static void	median_5		(unsigned char *src, unsigned char *dest, int height, int width);
+static void	median_9		(unsigned char *src, unsigned char *dest, int height, int width);
+static void	gst_median_chain	(GstPad *pad, GstBuffer *buf);
+
+static void	gst_median_set_property	(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
+static void	gst_median_get_property	(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
+
+static GstElementClass *parent_class = NULL;
+//static guint gst_median_signals[LAST_SIGNAL] = { 0 };
+
+static GstPadNegotiateReturn
+median_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+  GstMedian* filter = GST_MEDIAN (gst_pad_get_parent (pad));
+
+  if (*caps==NULL)
+    return GST_PAD_NEGOTIATE_FAIL;
+
+  return gst_pad_negotiate_proxy (pad, filter->sinkpad, caps);
+}
+
+static GstPadNegotiateReturn
+median_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+  GstMedian* filter = GST_MEDIAN (gst_pad_get_parent (pad));
+
+  if (*caps==NULL)
+    return GST_PAD_NEGOTIATE_FAIL;
+
+  return gst_pad_negotiate_proxy (pad, filter->srcpad, caps);
+}
+
+GType
+gst_median_get_type (void)
+{
+  static GType median_type = 0;
+
+  if (!median_type) {
+    static const GTypeInfo median_info = {
+      sizeof(GstMedianClass),      NULL,      NULL,      (GClassInitFunc)gst_median_class_init,
+      NULL,
+      NULL,
+      sizeof(GstMedian),
+      0,
+      (GInstanceInitFunc)gst_median_init,
+    };
+    median_type = g_type_register_static(GST_TYPE_ELEMENT, "GstMedian", &median_info, 0);
+  }
+  return median_type;
+}
+
+static void
+gst_median_class_init (GstMedianClass *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_FILTERSIZE,
+    g_param_spec_int("filtersize","filtersize","filtersize",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_LUM_ONLY,
+    g_param_spec_boolean("lum_only","lum_only","lum_only",
+                         TRUE,G_PARAM_READWRITE)); // CHECKME
+
+  gobject_class->set_property = gst_median_set_property;
+  gobject_class->get_property = gst_median_get_property;
+}
+
+static void
+gst_median_newcaps (GstPad *pad, GstCaps *caps)
+{
+  GstMedian *filter;
+
+  filter = GST_MEDIAN (gst_pad_get_parent (pad));
+
+  filter->width = gst_caps_get_int (caps, "width");
+  filter->height = gst_caps_get_int (caps, "height");
+}
+
+void gst_median_init (GstMedian *median)
+{
+  median->sinkpad = gst_pad_new_from_template (
+		  GST_PADTEMPLATE_GET (median_sink_factory), "sink");
+  gst_pad_set_negotiate_function (median->sinkpad, median_negotiate_sink);
+  gst_pad_set_newcaps_function (median->sinkpad, gst_median_newcaps);
+  gst_pad_set_chain_function (median->sinkpad, gst_median_chain);
+  gst_element_add_pad (GST_ELEMENT (median), median->sinkpad);
+
+  median->srcpad = gst_pad_new_from_template (
+		  GST_PADTEMPLATE_GET (median_src_factory), "src");
+  gst_pad_set_negotiate_function (median->srcpad, median_negotiate_src);
+  gst_element_add_pad (GST_ELEMENT (median), median->srcpad);
+
+  median->filtersize = 5;
+  median->lum_only = TRUE;
+  median->active = TRUE;
+}
+
+#define PIX_SORT(a,b) { if ((a)>(b)) PIX_SWAP((a),(b)); }
+#define PIX_SWAP(a,b) { unsigned char temp=(a);(a)=(b);(b)=temp; }
+
+static void
+median_5 (unsigned char *src, unsigned char *dest, int width, int height)
+{
+  int nLastRow;
+  int nLastCol;
+  unsigned char p[9];
+  int i, j, k;
+
+  nLastCol = width - 1;
+  nLastRow = height - 1;
+
+  //copy the top and bottom rows into the result array
+  for (i=0; i<width; i++) {
+    dest[i] = src[i];
+    dest[nLastRow * width + i] = src[nLastRow * width + i];
+  }
+  dest[i] = src[i];
+
+  nLastCol--;
+  nLastRow--;
+
+  /* process the interior pixels */
+  i = width + 1;
+  for (k=0; k < nLastRow; k++) {
+    for (j=0; j < nLastCol; j++, i++) {
+      p[0] = src[i-width];
+      p[1] = src[i-1];
+      p[2] = src[i];
+      p[3] = src[i+1];
+      p[4] = src[i+width];
+      PIX_SORT(p[0],p[1]) ; PIX_SORT(p[3],p[4]) ; PIX_SORT(p[0],p[3]) ;
+      PIX_SORT(p[1],p[4]) ; PIX_SORT(p[1],p[2]) ; PIX_SORT(p[2],p[3]) ;
+      PIX_SORT(p[1],p[2]) ;
+      dest[i] = p[2];
+    }
+    dest[i] = src[i++];
+    dest[i] = src[i++];
+  }
+  dest[i] = src[i++];
+}
+
+static void
+median_9 (unsigned char *src, unsigned char *dest, int width, int height)
+{
+  int nLastRow;
+  int nLastCol;
+  unsigned char p[9];
+  int i, j, k;
+
+  nLastCol = width - 1;
+  nLastRow = height - 1;
+
+  //copy the top and bottom rows into the result array
+  for (i=0; i<width; i++) {
+    dest[i] = src[i];
+    dest[nLastRow * width + i] = src[nLastRow * width + i];
+  }
+  dest[i] = src[i];
+
+  nLastCol--;
+  nLastRow--;
+
+  /* process the interior pixels */
+  i = width + 1;
+  for (k=0; k < nLastRow; k++) {
+    for (j=0; j < nLastCol; j++, i++) {
+      p[0] = src[i-width-1];
+      p[1] = src[i-width];
+      p[2] = src[i-width+1];
+      p[3] = src[i-1];
+      p[4] = src[i];
+      p[5] = src[i+1];
+      p[6] = src[i+width-1];
+      p[7] = src[i+width];
+      p[8] = src[i+width+1];
+      PIX_SORT(p[1], p[2]) ; PIX_SORT(p[4], p[5]) ; PIX_SORT(p[7], p[8]) ; 
+      PIX_SORT(p[0], p[1]) ; PIX_SORT(p[3], p[4]) ; PIX_SORT(p[6], p[7]) ; 
+      PIX_SORT(p[1], p[2]) ; PIX_SORT(p[4], p[5]) ; PIX_SORT(p[7], p[8]) ; 
+      PIX_SORT(p[0], p[3]) ; PIX_SORT(p[5], p[8]) ; PIX_SORT(p[4], p[7]) ; 
+      PIX_SORT(p[3], p[6]) ; PIX_SORT(p[1], p[4]) ; PIX_SORT(p[2], p[5]) ; 
+      PIX_SORT(p[4], p[7]) ; PIX_SORT(p[4], p[2]) ; PIX_SORT(p[6], p[4]) ; 
+      PIX_SORT(p[4], p[2]) ;
+      dest[i] = p[4];
+    }
+    dest[i] = src[i++];
+    dest[i] = src[i++];
+  }
+  dest[i] = src[i++];
+}
+
+static void
+gst_median_chain (GstPad *pad, GstBuffer *buf)
+{
+  GstMedian *median;
+  guchar *data;
+  gulong size;
+  GstBuffer *outbuf;
+//  GstMeta *meta;
+  int lumsize, chromsize;
+
+  g_return_if_fail(pad != NULL);
+  g_return_if_fail(GST_IS_PAD(pad));
+  g_return_if_fail(buf != NULL);
+
+  median = GST_MEDIAN (GST_OBJECT_PARENT (pad));
+
+  if (!median->active) {
+    gst_pad_push(median->srcpad,buf);
+    return;
+  }
+
+  data = GST_BUFFER_DATA(buf);
+  size = GST_BUFFER_SIZE(buf);
+
+  GST_DEBUG (0,"median: have buffer of %d\n", 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 = median->width * median->height;
+  chromsize = lumsize/4;
+
+  if (median->filtersize == 5) {
+    median_5(data, GST_BUFFER_DATA(outbuf), median->width, median->height);
+    if (!median->lum_only) {
+      median_5(data+lumsize, GST_BUFFER_DATA(outbuf)+lumsize, median->width/2, median->height/2);
+      median_5(data+lumsize+chromsize, GST_BUFFER_DATA(outbuf)+lumsize+chromsize, median->width/2, median->height/2);
+    }
+    else {
+      memcpy (GST_BUFFER_DATA (outbuf)+lumsize, data+lumsize, chromsize*2);
+    }
+  }
+  else {
+    median_9(data, GST_BUFFER_DATA(outbuf), median->width, median->height);
+    if (!median->lum_only) {
+      median_9(data+lumsize, GST_BUFFER_DATA(outbuf)+lumsize, median->width/2, median->height/2);
+      median_9(data+lumsize+chromsize, GST_BUFFER_DATA(outbuf)+lumsize+chromsize, median->width/2, median->height/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(median->srcpad,outbuf);
+}
+
+static void
+gst_median_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  GstMedian *median;
+  gint argvalue;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail(GST_IS_MEDIAN(object));
+  median = GST_MEDIAN(object);
+
+  switch (prop_id) {
+    case ARG_FILTERSIZE:
+      argvalue = g_value_get_int (value);
+      if (argvalue != 5 && argvalue != 9) {
+	g_warning ("median: invalid filtersize (%d), must be 5 or 9\n", argvalue);
+      }
+      else {
+	median->filtersize = argvalue;
+      }
+      break;
+    case ARG_ACTIVE:
+      median->active = g_value_get_boolean (value);
+      break;
+    case ARG_LUM_ONLY:
+      median->lum_only = g_value_get_boolean (value);
+      break;
+    default:
+      break;
+  }
+}
+
+static void
+gst_median_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+  GstMedian *median;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail(GST_IS_MEDIAN(object));
+  median = GST_MEDIAN(object);
+
+  switch (prop_id) {
+    case ARG_FILTERSIZE:
+      g_value_set_int (value, median->filtersize);
+      break;
+    case ARG_ACTIVE:
+      g_value_set_boolean (value, median->active);
+      break;
+    case ARG_LUM_ONLY:
+      g_value_set_boolean (value, median->lum_only);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+  GstElementFactory *factory;
+
+  factory = gst_elementfactory_new("median",GST_TYPE_MEDIAN,
+                                   &median_details);
+  g_return_val_if_fail(factory != NULL, FALSE);
+
+  gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (median_sink_factory));
+  gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (median_src_factory));
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "median",
+  plugin_init
+};
+
diff --git a/gst/median/gstmedian.h b/gst/median/gstmedian.h
new file mode 100644
index 00000000..17c7d042
--- /dev/null
+++ b/gst/median/gstmedian.h
@@ -0,0 +1,72 @@
+/* Gnome-Streamer
+ * 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.
+ */
+
+
+#ifndef __GST_MEDIAN_H__
+#define __GST_MEDIAN_H__
+
+
+#include <config.h>
+#include <gst/gst.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_MEDIAN \
+  (gst_median_get_type())
+#define GST_MEDIAN(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MEDIAN,GstMedian))
+#define GST_MEDIAN_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MEDIAN,GstMedian))
+#define GST_IS_MEDIAN(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MEDIAN))
+#define GST_IS_MEDIAN_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MEDIAN))
+
+typedef struct _GstMedian GstMedian;
+typedef struct _GstMedianClass GstMedianClass;
+
+struct _GstMedian {
+  GstElement element;
+
+  int format;
+  int width;
+  int height;
+
+  int filtersize;
+
+  gboolean active;
+  gboolean lum_only;
+
+  GstPad *sinkpad,*srcpad;
+};
+
+struct _GstMedianClass {
+  GstElementClass parent_class;
+};
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GST_MEDIAN_H__ */