Initial revision

Original commit message from CVS:
Initial revision

4 files changed, 482 insertions, 0 deletions

diff --git a/gst/deinterlace/.gitignore b/gst/deinterlace/.gitignore
new file mode 100644
index 00000000..08f5ed37
--- /dev/null
+++ b/gst/deinterlace/.gitignore
@@ -0,0 +1,7 @@
+Makefile
+Makefile.in
+*.o
+*.lo
+*.la
+.deps
+.libs
diff --git a/gst/deinterlace/Makefile.am b/gst/deinterlace/Makefile.am
new file mode 100644
index 00000000..eafa47d5
--- /dev/null
+++ b/gst/deinterlace/Makefile.am
@@ -0,0 +1,9 @@
+filterdir = $(libdir)/gst
+
+filter_LTLIBRARIES = libgstdeinterlace.la
+
+libgstdeinterlace_la_SOURCES = gstdeinterlace.c
+libgstdeinterlace_la_CFLAGS = $(GST_CFLAGS)
+
+noinst_HEADERS = gstdeinterlace.h 
+
diff --git a/gst/deinterlace/gstdeinterlace.c b/gst/deinterlace/gstdeinterlace.c
new file mode 100644
index 00000000..99a70c84
--- /dev/null
+++ b/gst/deinterlace/gstdeinterlace.c
@@ -0,0 +1,390 @@
+/* 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.
+ */
+/* based on the Area Based Deinterlacer (for RGB frames)        */
+/* (a VirtualDub filter) from Gunnar Thalin <guth@home.se>      */
+
+#include <string.h>
+#include <gst/gst.h>
+#include "gstdeinterlace.h"
+
+static GstElementDetails deinterlace_details = {
+  "DeInterlace",
+  "Filter/Effect",
+  "Deinterlace video",
+  VERSION,
+  "Wim Taymans <wim.taymans@chello.be>",
+  "(C) 2001",
+};
+
+
+/* Filter signals and args */
+enum {
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  ARG_DI_ONLY,
+  ARG_BLEND,
+  ARG_THRESHOLD,
+  ARG_EDGE_DETECT,
+};
+
+GST_PADTEMPLATE_FACTORY (deinterlace_src_factory,
+  "src",
+  GST_PAD_SRC,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+   "deinterlace_src",
+   "video/raw",
+     "format",   GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
+  )
+)
+
+GST_PADTEMPLATE_FACTORY (deinterlace_sink_factory,
+  "sink",
+  GST_PAD_SINK,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+   "deinterlace_src",
+   "video/raw",
+     "format",   GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
+  )
+)
+
+static GType 		gst_deinterlace_get_type		(void);
+
+static void		gst_deinterlace_class_init		(GstDeInterlaceClass *klass);
+static void		gst_deinterlace_init			(GstDeInterlace *filter);
+
+static void		gst_deinterlace_set_property			(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
+static void		gst_deinterlace_get_property			(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
+
+static void		gst_deinterlace_chain			(GstPad *pad, GstBuffer *buf);
+
+static GstElementClass *parent_class = NULL;
+//static guint gst_filter_signals[LAST_SIGNAL] = { 0 };
+
+static GstPadNegotiateReturn
+deinterlace_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+  GstDeInterlace* filter = GST_DEINTERLACE (gst_pad_get_parent (pad));
+  
+  if (*caps==NULL) 
+    return GST_PAD_NEGOTIATE_FAIL;
+  
+  return gst_pad_negotiate_proxy(pad,filter->sinkpad,caps);
+}
+
+static GstPadNegotiateReturn
+deinterlace_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+  GstDeInterlace* filter = GST_DEINTERLACE (gst_pad_get_parent (pad));
+  
+  if (*caps==NULL) 
+    return GST_PAD_NEGOTIATE_FAIL;
+  
+  return gst_pad_negotiate_proxy(pad,filter->srcpad,caps);
+}		
+
+static GType
+gst_deinterlace_get_type(void) {
+  static GType deinterlace_type = 0;
+
+  if (!deinterlace_type) {
+    static const GTypeInfo deinterlace_info = {
+      sizeof(GstDeInterlaceClass),      NULL,
+      NULL,
+      (GClassInitFunc)gst_deinterlace_class_init,
+      NULL,
+      NULL,
+      sizeof(GstDeInterlace),
+      0,
+      (GInstanceInitFunc)gst_deinterlace_init,
+    };
+    deinterlace_type = g_type_register_static(GST_TYPE_ELEMENT, "GstDeInterlace", &deinterlace_info, 0);
+  }
+  return deinterlace_type;
+}
+
+static void
+gst_deinterlace_class_init (GstDeInterlaceClass *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_DI_ONLY,
+    g_param_spec_boolean("di_area_only","di_area_only","di_area_only",
+                         TRUE,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BLEND,
+    g_param_spec_boolean("blend","blend","blend",
+                         TRUE,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_THRESHOLD,
+    g_param_spec_int("threshold","threshold","threshold",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_EDGE_DETECT,
+    g_param_spec_int("edge_detect","edge_detect","edge_detect",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+
+  gobject_class->set_property = gst_deinterlace_set_property;
+  gobject_class->get_property = gst_deinterlace_get_property;
+}
+
+static void
+gst_deinterlace_newcaps (GstPad *pad, GstCaps *caps)
+{
+  GstDeInterlace *filter;
+
+  filter = GST_DEINTERLACE(gst_pad_get_parent (pad));
+
+  filter->width = gst_caps_get_int (caps, "width");
+  filter->height = gst_caps_get_int (caps, "height");
+
+  if (filter->picsize != (filter->width*filter->height)) {
+    if (filter->src) 
+      g_free(filter->src);
+    filter->picsize = filter->width*filter->height;
+    filter->src = g_malloc(filter->picsize);
+  }
+}
+
+static void
+gst_deinterlace_init (GstDeInterlace *filter)
+{
+  filter->sinkpad = gst_pad_new_from_template(deinterlace_sink_factory (),"sink");
+  gst_pad_set_negotiate_function(filter->sinkpad,deinterlace_negotiate_sink);
+  gst_pad_set_chain_function(filter->sinkpad,gst_deinterlace_chain);
+  gst_pad_set_newcaps_function(filter->sinkpad,gst_deinterlace_newcaps);
+  gst_element_add_pad(GST_ELEMENT(filter),filter->sinkpad);
+
+  filter->srcpad = gst_pad_new_from_template(deinterlace_src_factory (),"src");
+  gst_pad_set_negotiate_function(filter->srcpad,deinterlace_negotiate_src);
+  gst_element_add_pad(GST_ELEMENT(filter),filter->srcpad);
+
+  filter->show_deinterlaced_area_only = FALSE;
+  filter->blend = FALSE;
+  //filter->threshold_blend = 0; 
+  filter->threshold = 50;
+  filter->edge_detect = 25;
+
+  filter->src = NULL;
+  filter->picsize = 0;
+}
+
+static void
+gst_deinterlace_chain (GstPad *pad, GstBuffer *buf)
+{
+  GstDeInterlace *filter;
+  gint y0, y1, y2, y3;
+  guchar *psrc1, *psrc2, *psrc3, *pdst1, *yuvptr, *src;
+  gint iInterlaceValue0, iInterlaceValue1, iInterlaceValue2;
+  gint x, y;
+  gint y_line;
+  guchar *y_dst, *y_src;
+  gboolean bBlend;
+  gint iThreshold;
+  gint iEdgeDetect;
+  gint width, height;
+  gboolean bShowDeinterlacedAreaOnly;
+
+  g_return_if_fail (pad != NULL);
+  g_return_if_fail (GST_IS_PAD (pad));
+  g_return_if_fail (buf != NULL);
+
+  filter = GST_DEINTERLACE (gst_pad_get_parent (pad));
+
+  bBlend = filter->blend;
+  iThreshold = filter->threshold;
+  iEdgeDetect = filter->edge_detect;
+  width = filter->width;
+  height = filter->height;
+  src = filter->src;
+  yuvptr = GST_BUFFER_DATA (buf);
+  bShowDeinterlacedAreaOnly = filter->show_deinterlaced_area_only;
+
+  memcpy(filter->src, yuvptr, filter->picsize); 
+
+  y_dst = yuvptr;  // dst y pointer
+                   // we should not change u,v because one u, v value stands for
+                   // 2 pixels per 2 lines = 4 pixel and we don't want to change
+                   // the color of
+
+  y_line  = width;
+  y_src = src;
+
+  iThreshold = iThreshold * iThreshold * 4;
+  // We don't want an integer overflow in the  interlace calculation.
+  if (iEdgeDetect > 180)
+    iEdgeDetect = 180;
+  iEdgeDetect = iEdgeDetect * iEdgeDetect;
+
+  y1 = 0;		// Avoid compiler warning. The value is not used.
+  for (x = 0; x < width; x++) {
+    psrc3 = y_src + x;
+    y3    = *psrc3;
+    psrc2 = psrc3 + y_line;
+    y2 = *psrc2;
+    pdst1 = y_dst + x;
+    iInterlaceValue1 = iInterlaceValue2 = 0;
+    for (y = 0; y <= height; y++) {
+      psrc1 = psrc2;
+      psrc2 = psrc3;
+      psrc3 = psrc3 + y_line;
+      y0 = y1;
+      y1 = y2;
+      y2 = y3;
+      if (y < height - 1) {
+        y3 = *psrc3;
+      } else {
+        y3 = y1;
+      }
+
+      iInterlaceValue0 = iInterlaceValue1;
+      iInterlaceValue1 = iInterlaceValue2;
+
+      if (y < height)
+        iInterlaceValue2 = ((y1 - y2) * (y3 - y2) - 
+                                  ((iEdgeDetect * (y1 - y3) * (y1 - y3)) >> 12))*10;
+      else
+        iInterlaceValue2 = 0;
+
+      if (y > 0) {			
+        if (iInterlaceValue0 + 2 * iInterlaceValue1 + iInterlaceValue2 > iThreshold) {
+          if (bBlend) { 
+            *pdst1 = (unsigned char)((y0 + 2*y1 + y2) >> 2);
+          } else {
+            // this method seems to work better than blending if the
+            // quality is pretty bad and the half pics don't fit together
+            if ((y % 2)==1) {  // if odd simply copy the value
+              *pdst1 = *psrc1;
+              //*pdst1 = 0; // FIXME this is for adjusting an initial iThreshold
+            } else {        // even interpolate the even line (upper + lower)/2
+              *pdst1 = (unsigned char)((y0 + y2) >> 1);
+              //*pdst1 = 0; // FIXME this is for adjusting an initial iThreshold
+            }
+          } 
+        } else {
+          // so we went below the treshold and therefore we don't have to 
+          // change anything
+          if (bShowDeinterlacedAreaOnly) {
+                // this is for testing to see how we should tune the treshhold
+                // and shows as the things that haven't change because the 
+                // threshhold was to low?? (or shows that everything is ok :-)
+            *pdst1 = 0; // blank the point and so the interlac area
+          } else {
+            *pdst1 = *psrc1;
+          }
+        }
+        pdst1 = pdst1 + y_line;
+      }
+    }
+  }
+
+  gst_pad_push (filter->srcpad, buf);
+}
+
+static void
+gst_deinterlace_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  GstDeInterlace *filter;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail(GST_IS_DEINTERLACE(object));
+
+  filter = GST_DEINTERLACE(object);
+
+  switch (prop_id) 
+  {
+    case ARG_DI_ONLY:
+      filter->show_deinterlaced_area_only = g_value_get_boolean (value);
+      break;
+    case ARG_BLEND:
+      filter->blend = g_value_get_boolean (value);
+      break;
+    case ARG_THRESHOLD:
+      filter->threshold = g_value_get_int (value);
+      break;
+    case ARG_EDGE_DETECT:
+      filter->edge_detect = g_value_get_int (value);
+      break;
+    default:
+      break;
+  }
+}
+
+static void
+gst_deinterlace_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+  GstDeInterlace *filter;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail(GST_IS_DEINTERLACE(object));
+
+  filter = GST_DEINTERLACE(object);
+
+  switch (prop_id) {
+    case ARG_DI_ONLY:
+      g_value_set_boolean (value, filter->show_deinterlaced_area_only);
+      break;
+    case ARG_BLEND:
+      g_value_set_boolean (value, filter->blend);
+      break;
+    case ARG_THRESHOLD:
+      g_value_set_int (value, filter->threshold);
+      break;
+    case ARG_EDGE_DETECT:
+      g_value_set_int (value, filter->edge_detect);
+      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("deinterlace",GST_TYPE_DEINTERLACE,
+                                   &deinterlace_details);
+  g_return_val_if_fail(factory != NULL, FALSE);
+  
+  gst_elementfactory_add_padtemplate (factory, 
+		  GST_PADTEMPLATE_GET (deinterlace_src_factory));
+  gst_elementfactory_add_padtemplate (factory, 
+		  GST_PADTEMPLATE_GET (deinterlace_sink_factory));
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "deinterlace",
+  plugin_init
+};
diff --git a/gst/deinterlace/gstdeinterlace.h b/gst/deinterlace/gstdeinterlace.h
new file mode 100644
index 00000000..c46c3af6
--- /dev/null
+++ b/gst/deinterlace/gstdeinterlace.h
@@ -0,0 +1,76 @@
+/* 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_DEINTERLACE_H__
+#define __GST_DEINTERLACE_H__
+
+
+#include <config.h>
+#include <gst/gst.h>
+// #include <gst/meta/audioraw.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_DEINTERLACE \
+  (gst_deinterlace_get_type())
+#define GST_DEINTERLACE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DEINTERLACE,GstDeInterlace))
+#define GST_DEINTERLACE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstDeInterlace))
+#define GST_IS_DEINTERLACE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DEINTERLACE))
+#define GST_IS_DEINTERLACE_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DEINTERLACE))
+
+typedef struct _GstDeInterlace GstDeInterlace;
+typedef struct _GstDeInterlaceClass GstDeInterlaceClass;
+
+struct _GstDeInterlace {
+  GstElement element;
+
+  GstPad *sinkpad, *srcpad;
+
+  gint width, height;
+
+  gboolean show_deinterlaced_area_only;
+  gboolean blend;
+  gint threshold_blend; // here we start blending
+  gint threshold;         // here we start interpolating TODO FIXME
+  gint edge_detect;
+
+  gint picsize;
+  guchar *src;
+
+};
+
+struct _GstDeInterlaceClass {
+  GstElementClass parent_class;
+};
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GST_STEREO_H__ */