Initial revision

Original commit message from CVS:
Initial revision

1 files changed, 362 insertions, 0 deletions

diff --git a/gst/smooth/gstsmooth.c b/gst/smooth/gstsmooth.c
new file mode 100644
index 00000000..5f1f507c
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+++ b/gst/smooth/gstsmooth.c
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+/* 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 <gstsmooth.h>
+
+
+static GstElementDetails smooth_details = {
+  "Smooth effect",
+  "Filter/Effect",
+  "apply a smooth filter to an image",
+  VERSION,
+  "Wim Taymans <wim.taymans@chello.be>",
+  "(C) 2000",
+};
+
+
+/* Smooth signals and args */
+enum {
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  ARG_ACTIVE,
+  ARG_TOLERANCE,
+  ARG_FILTERSIZE,
+  ARG_LUM_ONLY
+};
+
+GST_PADTEMPLATE_FACTORY (smooth_src_factory,
+  "src",
+  GST_PAD_SRC,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+   "smooth_src",
+   "video/raw",
+     "format",   GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
+  )
+)
+
+GST_PADTEMPLATE_FACTORY (smooth_sink_factory,
+  "sink",
+  GST_PAD_SINK,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+   "smooth_src",
+   "video/raw",
+     "format",   GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
+  )
+)
+
+static void	gst_smooth_class_init	(GstSmoothClass *klass);
+static void	gst_smooth_init		(GstSmooth *smooth);
+
+static void	gst_smooth_chain	(GstPad *pad, GstBuffer *buf);
+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 };
+
+static GstPadNegotiateReturn
+smooth_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+  GstSmooth* filter = GST_SMOOTH (gst_pad_get_parent (pad));
+
+  if (*caps==NULL)
+    return GST_PAD_NEGOTIATE_FAIL;
+
+  return gst_pad_negotiate_proxy (pad, filter->sinkpad, caps);
+}
+
+static GstPadNegotiateReturn
+smooth_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+  GstSmooth* filter = GST_SMOOTH (gst_pad_get_parent (pad));
+
+  if (*caps==NULL)
+    return GST_PAD_NEGOTIATE_FAIL;
+
+  return gst_pad_negotiate_proxy (pad, filter->srcpad, caps);
+}
+
+GType
+gst_smooth_get_type (void)
+{
+  static GType smooth_type = 0;
+
+  if (!smooth_type) {
+    static const GTypeInfo smooth_info = {
+      sizeof(GstSmoothClass),      NULL,
+      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_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 void
+gst_smooth_newcaps (GstPad *pad, GstCaps *caps)
+{
+  GstSmooth *filter;
+
+  filter = GST_SMOOTH (gst_pad_get_parent (pad));
+
+  filter->width = gst_caps_get_int (caps, "width");
+  filter->height = gst_caps_get_int (caps, "height");
+}
+
+static void
+gst_smooth_init (GstSmooth *smooth)
+{
+  smooth->sinkpad = gst_pad_new_from_template (
+                  GST_PADTEMPLATE_GET (smooth_sink_factory), "sink");
+  gst_pad_set_negotiate_function (smooth->sinkpad, smooth_negotiate_sink);
+  gst_pad_set_newcaps_function (smooth->sinkpad, gst_smooth_newcaps);
+  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_PADTEMPLATE_GET (smooth_src_factory), "src");
+  gst_pad_set_negotiate_function (smooth->srcpad, smooth_negotiate_src);
+  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, GstBuffer *buf)
+{
+  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,buf);
+    return;
+  }
+
+  data = GST_BUFFER_DATA (buf);
+  size = GST_BUFFER_SIZE (buf);
+
+  GST_DEBUG (0,"smooth: 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 = 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, 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 (GModule *module, GstPlugin *plugin)
+{
+  GstElementFactory *factory;
+
+  factory = gst_elementfactory_new("smooth",GST_TYPE_SMOOTH,
+                                   &smooth_details);
+  g_return_val_if_fail(factory != NULL, FALSE);
+
+  gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (smooth_sink_factory));
+  gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (smooth_src_factory));
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "smooth",
+  plugin_init
+};
+