And the revTV plugin..

Original commit message from CVS:
And the revTV plugin..

1 files changed, 293 insertions, 0 deletions

diff --git a/gst/effectv/gstrev.c b/gst/effectv/gstrev.c
new file mode 100644
index 000000000..5f7ec04bb
--- /dev/null
+++ b/gst/effectv/gstrev.c
@@ -0,0 +1,293 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * EffecTV:
+ * Copyright (C) 2001 FUKUCHI Kentarou
+ *
+ * EffecTV is free software. We release this product under the terms of the
+ * GNU General Public License version 2. The license is included in the file
+ * COPYING.
+ *
+ * This program 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 General Public License for more details.
+ */
+/*
+ * EffecTV - Realtime Digital Video Effector
+ * Copyright (C) 2001 FUKUCHI Kentarou
+ *
+ * revTV based on Rutt-Etra Video Synthesizer 1974?
+
+ * (c)2002 Ed Tannenbaum
+ *
+ * This effect acts like a waveform monitor on each line.
+ * It was originally done by deflecting the electron beam on a monitor using
+ * additional electromagnets on the yoke of a b/w CRT. Here it is emulated digitally.
+
+ * Experimaental tapes were made with this system by Bill and Louise Etra and Woody and Steina Vasulka
+
+ * The line spacing can be controlled using the 1 and 2 Keys.
+ * The gain is controlled using the 3 and 4 keys.
+ * The update rate is controlled using the 0 and - keys.
+ */
+
+#include <math.h>
+#include <string.h>
+#include <gst/gst.h>
+#include "gsteffectv.h"
+
+#define GST_TYPE_REVTV \
+  (gst_revtv_get_type())
+#define GST_REVTV(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_REVTV,GstRevTV))
+#define GST_REVTV_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstRevTV))
+#define GST_IS_REVTV(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_REVTV))
+#define GST_IS_REVTV_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_REVTV))
+
+#define THE_COLOR 0xffffffff
+
+typedef struct _GstRevTV GstRevTV;
+typedef struct _GstRevTVClass GstRevTVClass;
+
+struct _GstRevTV
+{
+  GstElement element;
+
+  GstPad *sinkpad, *srcpad;
+
+  gint width, height;
+  gint vgrabtime;
+  gint vgrab;
+  gint linespace;
+  gint vscale;
+};
+
+struct _GstRevTVClass
+{
+  GstElementClass parent_class;
+
+  void (*reset) (GstElement *element);
+};
+
+GstElementDetails gst_revtv_details = {
+  "RevTV",
+  "Filter/Effect",
+  "A loopback alpha blending effector with rotating and scaling",
+  VERSION,
+  "Wim Taymans <wim.taymans@chello.be>",
+  "(C) 2001 FUKUCHI Kentarou,"
+  "(c) 2002 Ed Tannenbaum",
+};
+
+
+/* Filter signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+  ARG_DELAY,
+  ARG_LINESPACE,
+  ARG_GAIN,
+};
+
+static void 	gst_revtv_class_init 		(GstRevTVClass * klass);
+static void 	gst_revtv_init 			(GstRevTV * filter);
+
+static void 	gst_revtv_set_property 		(GObject * object, guint prop_id,
+					  	 const GValue * value, GParamSpec * pspec);
+static void 	gst_revtv_get_property 		(GObject * object, guint prop_id,
+					  	 GValue * value, GParamSpec * pspec);
+
+static void 	gst_revtv_chain 		(GstPad * pad, GstBuffer * buf);
+
+static GstElementClass *parent_class = NULL;
+/* static guint gst_revtv_signals[LAST_SIGNAL] = { 0 }; */
+
+GType gst_revtv_get_type (void)
+{
+  static GType revtv_type = 0;
+
+  if (!revtv_type) {
+    static const GTypeInfo revtv_info = {
+      sizeof (GstRevTVClass), NULL,
+      NULL,
+      (GClassInitFunc) gst_revtv_class_init,
+      NULL,
+      NULL,
+      sizeof (GstRevTV),
+      0,
+      (GInstanceInitFunc) gst_revtv_init,
+    };
+
+    revtv_type = g_type_register_static (GST_TYPE_ELEMENT, "GstRevTV", &revtv_info, 0);
+  }
+  return revtv_type;
+}
+
+static void
+gst_revtv_class_init (GstRevTVClass * 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_DELAY,
+    g_param_spec_int ("delay","Delay","Delay in frames between updates",
+                        1, 100, 1, G_PARAM_READWRITE));
+  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LINESPACE,
+    g_param_spec_int ("linespace","Linespace","Control line spacing",
+                        1, 100, 6, G_PARAM_READWRITE));
+  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_GAIN,
+    g_param_spec_int ("gain","Gain","Control gain",
+                        1, 200, 50, G_PARAM_READWRITE));
+
+  gobject_class->set_property = gst_revtv_set_property;
+  gobject_class->get_property = gst_revtv_get_property;
+}
+
+static GstPadConnectReturn
+gst_revtv_sinkconnect (GstPad * pad, GstCaps * caps)
+{
+  GstRevTV *filter;
+
+  filter = GST_REVTV (gst_pad_get_parent (pad));
+
+  if (!GST_CAPS_IS_FIXED (caps))
+    return GST_PAD_CONNECT_DELAYED;
+
+  gst_caps_get_int (caps, "width", &filter->width);
+  gst_caps_get_int (caps, "height", &filter->height);
+
+  if (gst_pad_try_set_caps (filter->srcpad, caps)) {
+    return GST_PAD_CONNECT_OK;
+  }
+
+  return GST_PAD_CONNECT_REFUSED;
+}
+
+static void
+gst_revtv_init (GstRevTV * filter)
+{
+  filter->sinkpad = gst_pad_new_from_template (gst_effectv_sink_factory (), "sink");
+  gst_pad_set_chain_function (filter->sinkpad, gst_revtv_chain);
+  gst_pad_set_connect_function (filter->sinkpad, gst_revtv_sinkconnect);
+  gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
+
+  filter->srcpad = gst_pad_new_from_template (gst_effectv_src_factory (), "src");
+  gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
+
+  filter->vgrabtime = 1;
+  filter->vgrab = 0;
+  filter->linespace = 6;
+  filter->vscale = 50;
+}
+
+
+static void
+gst_revtv_chain (GstPad * pad, GstBuffer * buf)
+{
+  GstRevTV *filter;
+  guint32 *src, *dest;
+  GstBuffer *outbuf;
+  gint width, height, area;
+  guint32 *nsrc;
+  gint y, x, R, G, B, yval;
+
+  filter = GST_REVTV (gst_pad_get_parent (pad));
+
+  src = (guint32 *) GST_BUFFER_DATA (buf);
+
+  width = filter->width;
+  height = filter->height;
+  area = width * height;
+
+  outbuf = gst_buffer_new ();
+  GST_BUFFER_SIZE (outbuf) = area * sizeof(guint32);
+  dest = (guint32 *) GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
+  GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
+
+  // draw the offset lines
+  for (y = 0; y < height ; y += filter->linespace){
+    for (x = 0; x <= width; x++) {
+      nsrc = src + (y * width) + x;
+
+      // Calc Y Value for curpix
+      R = ((*nsrc) & 0xff0000) >> (16 - 1);
+      G = ((*nsrc) & 0xff00) >> (8 - 2);
+      B =  (*nsrc) & 0xff;
+
+      yval = y - ((short) (R + G + B) / filter->vscale) ;
+
+      if (yval > 0) {
+      	dest[x + (yval * width)] = THE_COLOR;
+      }
+    }
+  }
+  
+  gst_buffer_unref (buf);
+
+  gst_pad_push (filter->srcpad, outbuf);
+}
+
+static void
+gst_revtv_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+  GstRevTV *filter;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail (GST_IS_REVTV (object));
+
+  filter = GST_REVTV (object);
+
+  switch (prop_id) {
+    case ARG_DELAY:
+      filter->vgrabtime = g_value_get_int (value);
+      break;
+    case ARG_LINESPACE:
+      filter->linespace = g_value_get_int (value);
+      break;
+    case ARG_GAIN:
+      filter->vscale = g_value_get_int (value);
+      break;
+    default:
+      break;
+  }
+}
+
+static void
+gst_revtv_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec)
+{
+  GstRevTV *filter;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail (GST_IS_REVTV (object));
+
+  filter = GST_REVTV (object);
+
+  switch (prop_id) {
+    case ARG_DELAY:
+      g_value_set_int (value, filter->vgrabtime);
+      break;
+    case ARG_LINESPACE:
+      g_value_set_int (value, filter->linespace);
+      break;
+    case ARG_GAIN:
+      g_value_set_int (value, filter->vscale);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}