dicetv: Clean up dicetv element and fix some smaller issues

This fixes a memory leak (the dice map) and a crash when
setting the square-bits property before caps are set.

gst/effectv/gstdice.c

@@ -1,5 +1,6 @@
 /* GStreamer
  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
  *
  * dice.c: a 'dicing' effect
  *  copyright (c) 2001 Sam Mertens.  This code is subject to the provisions of
@@ -14,12 +15,13 @@
 #include "config.h"
 #endif
 
-#include <gst/video/gstvideofilter.h>
-
 #include <string.h>
 #include <gst/gst.h>
 
 #include <gst/video/video.h>
+#include <gst/video/gstvideofilter.h>
+
+#include <gst/controller/gstcontroller.h>
 
 #define GST_TYPE_DICETV \
   (gst_dicetv_get_type())
@@ -66,16 +68,10 @@ struct _GstDiceTVClass
   GstVideoFilterClass parent_class;
 };
 
-GType gst_dicetv_get_type (void);
+GST_BOILERPLATE (GstDiceTV, gst_dicetv, GstVideoFilter, GST_TYPE_VIDEO_FILTER);
 
 static void gst_dicetv_create_map (GstDiceTV * filter);
 
-static const GstElementDetails gst_dicetv_details =
-GST_ELEMENT_DETAILS ("DiceTV effect",
-    "Filter/Effect/Video",
-    "'Dices' the screen up into many small squares",
-    "Wim Taymans <wim.taymans@chello.be>");
-
 static GstStaticPadTemplate gst_dicetv_src_template =
     GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
@@ -92,8 +88,6 @@ static GstStaticPadTemplate gst_dicetv_sink_template =
         GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR)
     );
 
-static GstVideoFilterClass *parent_class = NULL;
-
 enum
 {
   ARG_0,
@@ -114,7 +108,7 @@ gst_dicetv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
       gst_structure_get_int (structure, "height", &filter->height)) {
     g_free (filter->dicemap);
     filter->dicemap =
-        (gchar *) g_malloc (filter->height * filter->width * sizeof (char));
+        (gchar *) g_malloc (filter->height * filter->width * sizeof (gchar));
     gst_dicetv_create_map (filter);
     ret = TRUE;
   }
@@ -126,13 +120,11 @@ static gboolean
 gst_dicetv_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
     guint * size)
 {
-  GstDiceTV *filter;
+  GstDiceTV *filter = GST_DICETV (btrans);
   GstStructure *structure;
   gboolean ret = FALSE;
   gint width, height;
 
-  filter = GST_DICETV (btrans);
-
   structure = gst_caps_get_structure (caps, 0);
 
   if (gst_structure_get_int (structure, "width", &width) &&
@@ -146,10 +138,10 @@ gst_dicetv_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
   return ret;
 }
 
-static unsigned int
+static inline guint
 fastrand (void)
 {
-  static unsigned int fastrand_val;
+  static guint fastrand_val;
 
   return (fastrand_val = fastrand_val * 1103515245 + 12345);
 }
@@ -157,17 +149,25 @@ fastrand (void)
 static GstFlowReturn
 gst_dicetv_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
 {
-  GstDiceTV *filter;
+  GstDiceTV *filter = GST_DICETV (trans);
   guint32 *src, *dest;
   gint i, map_x, map_y, map_i, base, dx, dy, di;
   gint video_width, g_cube_bits, g_cube_size;
   GstFlowReturn ret = GST_FLOW_OK;
+  GstClockTime timestamp, stream_time;
 
-  filter = GST_DICETV (trans);
   src = (guint32 *) GST_BUFFER_DATA (in);
   dest = (guint32 *) GST_BUFFER_DATA (out);
 
-  gst_buffer_copy_metadata (out, in, GST_BUFFER_COPY_TIMESTAMPS);
+  timestamp = GST_BUFFER_TIMESTAMP (in);
+  stream_time =
+      gst_segment_to_stream_time (&trans->segment, GST_FORMAT_TIME, timestamp);
+
+  GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
+      GST_TIME_ARGS (timestamp));
+
+  if (GST_CLOCK_TIME_IS_VALID (stream_time))
+    gst_object_sync_values (G_OBJECT (filter), stream_time);
 
   video_width = filter->width;
   g_cube_bits = filter->g_cube_bits;
@@ -236,6 +236,9 @@ gst_dicetv_create_map (GstDiceTV * filter)
 {
   gint x, y, i;
 
+  if (filter->height <= 0 || filter->width <= 0)
+    return;
+
   filter->g_map_height = filter->height >> filter->g_cube_bits;
   filter->g_map_width = filter->width >> filter->g_cube_bits;
   filter->g_cube_size = 1 << filter->g_cube_bits;
@@ -255,17 +258,15 @@ static void
 gst_dicetv_set_property (GObject * object, guint prop_id, const GValue * value,
     GParamSpec * pspec)
 {
-  GstDiceTV *filter;
+  GstDiceTV *filter = GST_DICETV (object);
-
-  g_return_if_fail (GST_IS_DICETV (object));
-
-  filter = GST_DICETV (object);
 
   switch (prop_id) {
     case ARG_CUBE_BITS:
       filter->g_cube_bits = g_value_get_int (value);
       gst_dicetv_create_map (filter);
+      break;
     default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }
@@ -274,11 +275,7 @@ static void
 gst_dicetv_get_property (GObject * object, guint prop_id, GValue * value,
     GParamSpec * pspec)
 {
-  GstDiceTV *filter;
+  GstDiceTV *filter = GST_DICETV (object);
-
-  g_return_if_fail (GST_IS_DICETV (object));
-
-  filter = GST_DICETV (object);
 
   switch (prop_id) {
     case ARG_CUBE_BITS:
@@ -290,12 +287,26 @@ gst_dicetv_get_property (GObject * object, guint prop_id, GValue * value,
   }
 }
 
+static void
+gst_dicetv_finalize (GObject * object)
+{
+  GstDiceTV *filter = GST_DICETV (object);
+
+  g_free (filter->dicemap);
+  filter->dicemap = NULL;
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
 static void
 gst_dicetv_base_init (gpointer g_class)
 {
   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
 
-  gst_element_class_set_details (element_class, &gst_dicetv_details);
+  gst_element_class_set_details_simple (element_class, "DiceTV effect",
+      "Filter/Effect/Video",
+      "'Dices' the screen up into many small squares",
+      "Wim Taymans <wim.taymans@chello.be>");
 
   gst_element_class_add_pad_template (element_class,
       gst_static_pad_template_get (&gst_dicetv_sink_template));
@@ -304,22 +315,19 @@ gst_dicetv_base_init (gpointer g_class)
 }
 
 static void
-gst_dicetv_class_init (gpointer klass, gpointer class_data)
+gst_dicetv_class_init (GstDiceTVClass * klass)
 {
-  GObjectClass *gobject_class;
+  GObjectClass *gobject_class = (GObjectClass *) klass;
-  GstBaseTransformClass *trans_class;
+  GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
-
-  gobject_class = (GObjectClass *) klass;
-  trans_class = (GstBaseTransformClass *) klass;
-
-  parent_class = g_type_class_peek_parent (klass);
 
   gobject_class->set_property = gst_dicetv_set_property;
   gobject_class->get_property = gst_dicetv_get_property;
+  gobject_class->finalize = gst_dicetv_finalize;
 
   g_object_class_install_property (gobject_class, ARG_CUBE_BITS,
-      g_param_spec_int ("square_bits", "Square Bits", "The size of the Squares",
+      g_param_spec_int ("square-bits", "Square Bits", "The size of the Squares",
-          MIN_CUBE_BITS, MAX_CUBE_BITS, DEFAULT_CUBE_BITS, G_PARAM_READWRITE));
+          MIN_CUBE_BITS, MAX_CUBE_BITS, DEFAULT_CUBE_BITS,
+          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
 
   trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_dicetv_set_caps);
   trans_class->get_unit_size = GST_DEBUG_FUNCPTR (gst_dicetv_get_unit_size);
@@ -327,38 +335,11 @@ gst_dicetv_class_init (gpointer klass, gpointer class_data)
 }
 
 static void
-gst_dicetv_init (GTypeInstance * instance, gpointer g_class)
+gst_dicetv_init (GstDiceTV * filter, GstDiceTVClass * klass)
 {
-  GstDiceTV *filter = GST_DICETV (instance);
-
   filter->dicemap = NULL;
   filter->g_cube_bits = DEFAULT_CUBE_BITS;
   filter->g_cube_size = 0;
   filter->g_map_height = 0;
   filter->g_map_width = 0;
 }
-
-GType
-gst_dicetv_get_type (void)
-{
-  static GType dicetv_type = 0;
-
-  if (!dicetv_type) {
-    static const GTypeInfo dicetv_info = {
-      sizeof (GstDiceTVClass),
-      gst_dicetv_base_init,
-      NULL,
-      (GClassInitFunc) gst_dicetv_class_init,
-      NULL,
-      NULL,
-      sizeof (GstDiceTV),
-      0,
-      (GInstanceInitFunc) gst_dicetv_init,
-    };
-
-    dicetv_type =
-        g_type_register_static (GST_TYPE_VIDEO_FILTER, "GstDiceTV",
-        &dicetv_info, 0);
-  }
-  return dicetv_type;
-}