Some cleanups ported the über cool warp plugin.

Original commit message from CVS:
Some cleanups
ported the über cool warp plugin.

1 files changed, 348 insertions, 0 deletions

diff --git a/gst/effectv/gstwarp.c b/gst/effectv/gstwarp.c
new file mode 100644
index 00000000..08f8e454
--- /dev/null
+++ b/gst/effectv/gstwarp.c
@@ -0,0 +1,348 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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
+ *
+ * From main.c of warp-1.1:
+ *
+ *      Simple DirectMedia Layer demo
+ *      Realtime picture 'gooing'
+ *      Released under GPL
+ *      by sam lantinga slouken@devolution.com
+ */
+
+#include <string.h>
+#include <math.h>
+#include <gst/gst.h>
+#include "gsteffectv.h"
+
+#ifndef M_PI
+#define M_PI	3.14159265358979323846
+#endif
+
+#define GST_TYPE_WARPTV \
+  (gst_warptv_get_type())
+#define GST_WARPTV(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_WARPTV,GstWarpTV))
+#define GST_WARPTV_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstWarpTV))
+#define GST_IS_WARPTV(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WARPTV))
+#define GST_IS_WARPTV_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_WARPTV))
+
+typedef struct _GstWarpTV GstWarpTV;
+typedef struct _GstWarpTVClass GstWarpTVClass;
+
+struct _GstWarpTV
+{
+  GstElement element;
+
+  GstPad *sinkpad, *srcpad;
+
+  gint width, height;
+  gint *offstable;
+  gint32 *disttable;
+  gint32 ctable[1024];
+  gint32 sintable[1024+256];
+  gint tval;
+};
+
+struct _GstWarpTVClass
+{
+  GstElementClass parent_class;
+};
+
+GstElementDetails gst_warptv_details = {
+  "WarpTV",
+  "Filter/Effect",
+  "WarpTV does realtime goo'ing of the video input",
+  VERSION,
+  "Sam Lantinga <slouken@devolution.com>",
+  "Wim Taymans <wim.taymans@chello.be>, "
+  "(C) 2001 FUKUCHI Kentarou",
+};
+
+
+/* Filter signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+};
+
+static void 	gst_warptv_class_init 		(GstWarpTVClass * klass);
+static void 	gst_warptv_init 		(GstWarpTV * filter);
+
+static void 	gst_warptv_initialize 		(GstWarpTV *filter);
+static void 	gst_warptv_dispose 		(GObject *object);
+
+static void 	gst_warptv_set_property 	(GObject * object, guint prop_id,
+					  	 const GValue * value, GParamSpec * pspec);
+static void 	gst_warptv_get_property 	(GObject * object, guint prop_id,
+					  	 GValue * value, GParamSpec * pspec);
+
+static void 	gst_warptv_chain 		(GstPad * pad, GstBuffer * buf);
+
+static GstElementClass *parent_class = NULL;
+/*static guint gst_warptv_signals[LAST_SIGNAL] = { 0 }; */
+
+GType gst_warptv_get_type (void)
+{
+  static GType warptv_type = 0;
+
+  if (!warptv_type) {
+    static const GTypeInfo warptv_info = {
+      sizeof (GstWarpTVClass), NULL,
+      NULL,
+      (GClassInitFunc) gst_warptv_class_init,
+      NULL,
+      NULL,
+      sizeof (GstWarpTV),
+      0,
+      (GInstanceInitFunc) gst_warptv_init,
+    };
+
+    warptv_type = g_type_register_static (GST_TYPE_ELEMENT, "GstWarpTV", &warptv_info, 0);
+  }
+  return warptv_type;
+}
+
+static void
+gst_warptv_class_init (GstWarpTVClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  gobject_class->set_property = gst_warptv_set_property;
+  gobject_class->get_property = gst_warptv_get_property;
+  gobject_class->dispose      = gst_warptv_dispose;
+}
+
+static GstPadConnectReturn
+gst_warptv_sinkconnect (GstPad * pad, GstCaps * caps)
+{
+  GstWarpTV *filter;
+
+  filter = GST_WARPTV (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);
+
+  gst_warptv_initialize (filter);
+
+  if (gst_pad_try_set_caps (filter->srcpad, caps)) {
+    return GST_PAD_CONNECT_OK;
+  }
+
+  return GST_PAD_CONNECT_REFUSED;
+}
+
+static void
+gst_warptv_init (GstWarpTV * filter)
+{
+  filter->sinkpad = gst_pad_new_from_template (gst_effectv_sink_factory (), "sink");
+  gst_pad_set_chain_function (filter->sinkpad, gst_warptv_chain);
+  gst_pad_set_connect_function (filter->sinkpad, gst_warptv_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->tval = 0;
+}
+
+
+static void 
+initSinTable (GstWarpTV *filter) 
+{
+  gint32	*tptr, *tsinptr;
+  double	i;
+
+  tsinptr = tptr = filter->sintable;
+
+  for (i = 0; i < 1024; i++)
+    *tptr++ = (int) (sin (i * M_PI / 512) * 32767);
+
+  for (i = 0; i < 256; i++)
+    *tptr++ = *tsinptr++;
+}
+
+static void 
+initOffsTable (GstWarpTV *filter) 
+{
+  int y;
+	
+  for (y = 0; y < filter->height; y++) {
+    filter->offstable[y] = y * filter->width;
+  }
+}
+      
+static void 
+initDistTable (GstWarpTV *filter) 
+{
+  gint32 halfw, halfh, *distptr;
+#ifdef PS2
+  float x,y,m;
+#else
+  double x,y,m;
+#endif
+
+  halfw = filter->width>> 1;
+  halfh = filter->height >> 1;
+
+  distptr = filter->disttable;
+
+  m = sqrt ((double)(halfw * halfw + halfh * halfh));
+
+  for (y = -halfh; y < halfh; y++)
+    for (x= -halfw; x < halfw; x++)
+#ifdef PS2
+      *distptr++ = ((int) ((sqrtf (x * x + y * y) * 511.9999) / m)) << 1;
+#else
+      *distptr++ = ((int) ((sqrt (x * x + y * y) * 511.9999) / m)) << 1;
+#endif
+}
+
+static void 
+gst_warptv_initialize (GstWarpTV *filter) 
+{
+  filter->offstable = (guint32 *) g_malloc (filter->height * sizeof (guint32));      
+  filter->disttable = g_malloc (filter->width * filter->height * sizeof (guint32));
+
+  initSinTable (filter);
+  initOffsTable (filter);
+  initDistTable (filter);
+}
+
+static void 
+gst_warptv_dispose (GObject *object) 
+{
+  GstWarpTV *filter = GST_WARPTV (object);
+
+  g_free (filter->disttable);
+  g_free (filter->offstable);
+}
+
+static void
+gst_warptv_chain (GstPad * pad, GstBuffer * buf)
+{
+  GstWarpTV *filter;
+  guint32 *src, *dest;
+  gint xw,yw,cw;
+  GstBuffer *outbuf;
+  gint32 c,i, x,y, dx,dy, maxx, maxy;
+  gint32 width, height, skip, *ctptr, *distptr;
+  gint32 *sintable, *ctable;
+
+  filter = GST_WARPTV (gst_pad_get_parent (pad));
+
+  src = (guint32 *) GST_BUFFER_DATA (buf);
+
+  outbuf = gst_buffer_new ();
+  GST_BUFFER_SIZE (outbuf) = (filter->width * filter->height * sizeof(guint32));
+  dest = (guint32 *) GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
+  GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
+  
+  xw  = (gint) (sin ((filter->tval + 100) * M_PI / 128) * 30);
+  yw  = (gint) (sin ((filter->tval) * M_PI / 256) * -35);
+  cw  = (gint) (sin ((filter->tval - 70) * M_PI / 64) * 50);
+  xw += (gint) (sin ((filter->tval - 10) * M_PI / 512) * 40);
+  yw += (gint) (sin ((filter->tval + 30) * M_PI / 512) * 40);	  
+
+  ctptr = filter->ctable;
+  distptr = filter->disttable;
+  width = filter->width;
+  height = filter->height;
+  sintable = filter->sintable;
+  ctable = filter->ctable;
+
+  skip = 0 ; /* video_width*sizeof(RGB32)/4 - video_width;; */
+  c = 0;
+
+  for (x = 0; x < 512; x++) {
+    i = (c >> 3) & 0x3FE;
+    *ctptr++ = ((sintable[i] * yw) >> 15);
+    *ctptr++ = ((sintable[i + 256] * xw) >> 15);
+    c += cw;
+  }
+  maxx = width - 2; maxy = height - 2;
+
+  for (y = 0; y < height - 1; y++) {
+    for (x = 0; x < width; x++) {
+      i = *distptr++; 
+      dx = ctable [i + 1] + x; 
+      dy = ctable [i] + y;	 
+
+      if (dx < 0) dx = 0; 
+      else if (dx > maxx) dx = maxx; 
+   
+      if (dy < 0) dy = 0; 
+      else if (dy > maxy) dy = maxy; 
+      *dest++ = src[filter->offstable[dy] + dx]; 
+    }
+    dest += skip;
+  }
+
+  filter->tval = (filter->tval + 1) & 511;
+
+  gst_buffer_unref (buf);
+
+  gst_pad_push (filter->srcpad, outbuf);
+}
+
+static void
+gst_warptv_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+  GstWarpTV *filter;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail (GST_IS_WARPTV (object));
+
+  filter = GST_WARPTV (object);
+
+  switch (prop_id) {
+    default:
+      break;
+  }
+}
+
+static void
+gst_warptv_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec)
+{
+  GstWarpTV *filter;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail (GST_IS_WARPTV (object));
+
+  filter = GST_WARPTV (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}