gstreamer_core/gst/gstvalue.c
branchRCL_3
changeset 30 7e817e7e631c
parent 29 567bb019e3e3
--- a/gstreamer_core/gst/gstvalue.c	Tue Aug 31 15:30:33 2010 +0300
+++ b/gstreamer_core/gst/gstvalue.c	Wed Sep 01 12:16:41 2010 +0100
@@ -19,15 +19,15 @@
 
 /**
  * SECTION:gstvalue
- * @short_description: GValue implementations specific
+ * @short_description: GValue and GParamSpec implementations specific
  * to GStreamer
  *
- * GValue implementations specific to GStreamer.
+ * GValue and GParamSpec implementations specific to GStreamer.
  *
  * Note that operations on the same GstValue (or GValue) from multiple
  * threads may lead to undefined behaviour. 
  *
- * Last reviewed on 2008-03-11 (0.10.18)
+ * Last reviewed on 2006-03-07 (0.10.4)
  */
 
 #ifdef HAVE_CONFIG_H
@@ -71,14 +71,7 @@
   GstValueSubtractFunc func;
 };
 
-#define FUNDAMENTAL_TYPE_ID_MAX \
-    (G_TYPE_FUNDAMENTAL_MAX >> G_TYPE_FUNDAMENTAL_SHIFT)
-#define FUNDAMENTAL_TYPE_ID(type) \
-    ((type) >> G_TYPE_FUNDAMENTAL_SHIFT)
-
 static GArray *gst_value_table;
-static GHashTable *gst_value_hash;
-static GstValueTable *gst_value_tables_fundamental[FUNDAMENTAL_TYPE_ID_MAX + 1];
 static GArray *gst_value_union_funcs;
 static GArray *gst_value_intersect_funcs;
 static GArray *gst_value_subtract_funcs;
@@ -91,28 +84,6 @@
 static gint gst_value_compare_with_func (const GValue * value1,
     const GValue * value2, GstValueCompareFunc compare);
 
-static gchar *gst_string_wrap (const gchar * s);
-static gchar *gst_string_take_and_wrap (gchar * s);
-static gchar *gst_string_unwrap (const gchar * s);
-
-static inline GstValueTable *
-gst_value_hash_lookup_type (GType type)
-{
-  if (G_LIKELY (G_TYPE_IS_FUNDAMENTAL (type)))
-    return gst_value_tables_fundamental[FUNDAMENTAL_TYPE_ID (type)];
-  else
-    return g_hash_table_lookup (gst_value_hash, (gpointer) type);
-}
-
-static void
-gst_value_hash_add_type (GType type, const GstValueTable * table)
-{
-  if (G_TYPE_IS_FUNDAMENTAL (type))
-    gst_value_tables_fundamental[FUNDAMENTAL_TYPE_ID (type)] = (gpointer) table;
-
-  g_hash_table_insert (gst_value_hash, (gpointer) type, (gpointer) table);
-}
-
 /********
  * list *
  ********/
@@ -129,17 +100,16 @@
   GString *s;
   GValue *v;
   gchar *s_val;
-  guint alen = array->len;
 
   /* estimate minimum string length to minimise re-allocs in GString */
-  s = g_string_sized_new (2 + (6 * alen) + 2);
+  s = g_string_sized_new (2 + (6 * array->len) + 2);
   g_string_append (s, begin);
-  for (i = 0; i < alen; i++) {
+  for (i = 0; i < array->len; i++) {
     v = &g_array_index (array, GValue, i);
     s_val = gst_value_serialize (v);
     g_string_append (s, s_val);
     g_free (s_val);
-    if (i < alen - 1) {
+    if (i < array->len - 1) {
       g_string_append_len (s, ", ", 2);
     }
   }
@@ -156,15 +126,13 @@
   GString *s;
   guint i;
   gchar *list_s;
-  guint alen;
 
   array = src_value->data[0].v_pointer;
-  alen = array->len;
 
   /* estimate minimum string length to minimise re-allocs in GString */
-  s = g_string_sized_new (2 + (10 * alen) + 2);
+  s = g_string_sized_new (2 + (10 * array->len) + 2);
   g_string_append (s, begin);
-  for (i = 0; i < alen; i++) {
+  for (i = 0; i < array->len; i++) {
     list_value = &g_array_index (array, GValue, i);
 
     if (i != 0) {
@@ -184,25 +152,20 @@
  * there. Do not export, since it doesn't work for types where the content
  * decides the fixedness (e.g. GST_TYPE_ARRAY).
  */
+
 static gboolean
 gst_type_is_fixed (GType type)
 {
-  /* the basic int, string, double types */
-  if (type <= G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_GLIB_LAST)) {
+  if (type == GST_TYPE_INT_RANGE || type == GST_TYPE_DOUBLE_RANGE ||
+      type == GST_TYPE_LIST) {
+    return FALSE;
+  }
+  if (G_TYPE_FUNDAMENTAL (type) <=
+      G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_GLIB_LAST)) {
     return TRUE;
   }
-  /* our fundamental types that are certainly not fixed */
-  if (type == GST_TYPE_INT_RANGE || type == GST_TYPE_DOUBLE_RANGE ||
-      type == GST_TYPE_LIST || type == GST_TYPE_FRACTION_RANGE) {
-    return FALSE;
-  }
-  /* other (boxed) types that are fixed */
-  if (type == GST_TYPE_BUFFER) {
-    return TRUE;
-  }
-  /* heavy checks */
-  if (G_TYPE_IS_FUNDAMENTAL (type) || G_TYPE_FUNDAMENTAL (type) <=
-      G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_GLIB_LAST)) {
+  if (type == GST_TYPE_BUFFER || type == GST_TYPE_FOURCC
+      || type == GST_TYPE_ARRAY || type == GST_TYPE_FRACTION) {
     return TRUE;
   }
 
@@ -220,12 +183,11 @@
 copy_garray_of_gstvalue (const GArray * src)
 {
   GArray *dest;
-  guint i, len;
-
-  len = src->len;
-  dest = g_array_sized_new (FALSE, TRUE, sizeof (GValue), len);
-  g_array_set_size (dest, len);
-  for (i = 0; i < len; i++) {
+  guint i;
+
+  dest = g_array_sized_new (FALSE, TRUE, sizeof (GValue), src->len);
+  g_array_set_size (dest, src->len);
+  for (i = 0; i < src->len; i++) {
     gst_value_init_and_copy (&g_array_index (dest, GValue, i),
         &g_array_index (src, GValue, i));
   }
@@ -243,12 +205,11 @@
 static void
 gst_value_free_list_or_array (GValue * value)
 {
-  guint i, len;
+  guint i;
   GArray *src = (GArray *) value->data[0].v_pointer;
-  len = src->len;
 
   if ((value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS) == 0) {
-    for (i = 0; i < len; i++) {
+    for (i = 0; i < src->len; i++) {
       g_value_unset (&g_array_index (src, GValue, i));
     }
     g_array_free (src, TRUE);
@@ -599,14 +560,13 @@
   guint i;
   GArray *array1 = value1->data[0].v_pointer;
   GArray *array2 = value2->data[0].v_pointer;
-  guint len = array1->len;
   GValue *v1;
   GValue *v2;
 
-  if (len != array2->len)
+  if (array1->len != array2->len)
     return GST_VALUE_UNORDERED;
 
-  for (i = 0; i < len; i++) {
+  for (i = 0; i < array1->len; i++) {
     v1 = &g_array_index (array1, GValue, i);
     v2 = &g_array_index (array2, GValue, i);
     if (gst_value_compare (v1, v2) != GST_VALUE_EQUAL)
@@ -998,7 +958,7 @@
  *
  * Gets the minimum of the range specified by @value.
  *
- * Returns: the minimum of the range
+ * Returns: the minumum of the range
  */
 #ifdef __SYMBIAN32__
 EXPORT_C
@@ -1080,13 +1040,10 @@
 gst_value_init_fraction_range (GValue * value)
 {
   GValue *vals;
-  GType ftype;
-
-  ftype = GST_TYPE_FRACTION;
-
-  value->data[0].v_pointer = vals = g_slice_alloc0 (2 * sizeof (GValue));
-  g_value_init (&vals[0], ftype);
-  g_value_init (&vals[1], ftype);
+
+  value->data[0].v_pointer = vals = g_new0 (GValue, 2);
+  g_value_init (&vals[0], GST_TYPE_FRACTION);
+  g_value_init (&vals[1], GST_TYPE_FRACTION);
 }
 
 static void
@@ -1097,7 +1054,7 @@
   if (vals != NULL) {
     g_value_unset (&vals[0]);
     g_value_unset (&vals[1]);
-    g_slice_free1 (2 * sizeof (GValue), vals);
+    g_free (vals);
     value->data[0].v_pointer = NULL;
   }
 }
@@ -1109,9 +1066,12 @@
   GValue *src_vals = (GValue *) src_value->data[0].v_pointer;
 
   if (vals == NULL) {
-    gst_value_init_fraction_range (dest_value);
-    vals = dest_value->data[0].v_pointer;
+    dest_value->data[0].v_pointer = vals = g_new0 (GValue, 2);
+    g_return_if_fail (vals != NULL);
+    g_value_init (&vals[0], GST_TYPE_FRACTION);
+    g_value_init (&vals[1], GST_TYPE_FRACTION);
   }
+
   if (src_vals != NULL) {
     g_value_copy (&src_vals[0], &vals[0]);
     g_value_copy (&src_vals[1], &vals[1]);
@@ -1128,8 +1088,12 @@
     return g_strdup_printf ("not enough value locations for `%s' passed",
         G_VALUE_TYPE_NAME (value));
   if (vals == NULL) {
-    gst_value_init_fraction_range (value);
-    vals = value->data[0].v_pointer;
+    value->data[0].v_pointer = vals = g_new0 (GValue, 2);
+    if (vals == NULL)
+      return g_strdup_printf ("Could not initialise`%s' during collect",
+          G_VALUE_TYPE_NAME (value));
+    g_value_init (&vals[0], GST_TYPE_FRACTION);
+    g_value_init (&vals[1], GST_TYPE_FRACTION);
   }
 
   gst_value_set_fraction (&vals[0], collect_values[0].v_int,
@@ -1148,26 +1112,26 @@
   int *dest_values[4];
   GValue *vals = (GValue *) value->data[0].v_pointer;
 
-  if (G_UNLIKELY (n_collect_values != 4))
+  if (n_collect_values != 4)
     return g_strdup_printf ("not enough value locations for `%s' passed",
         G_VALUE_TYPE_NAME (value));
 
   for (i = 0; i < 4; i++) {
-    if (G_UNLIKELY (collect_values[i].v_pointer == NULL)) {
+    if (collect_values[i].v_pointer == NULL) {
       return g_strdup_printf ("value location for `%s' passed as NULL",
           G_VALUE_TYPE_NAME (value));
     }
     dest_values[i] = collect_values[i].v_pointer;
   }
 
-  if (G_UNLIKELY (vals == NULL)) {
+  if (vals == NULL) {
     return g_strdup_printf ("Uninitialised `%s' passed",
         G_VALUE_TYPE_NAME (value));
   }
 
   dest_values[0][0] = gst_value_get_fraction_numerator (&vals[0]);
   dest_values[1][0] = gst_value_get_fraction_denominator (&vals[0]);
-  dest_values[2][0] = gst_value_get_fraction_numerator (&vals[1]);
+  dest_values[2][0] = gst_value_get_fraction_denominator (&vals[1]);
   dest_values[3][0] = gst_value_get_fraction_denominator (&vals[1]);
   return NULL;
 }
@@ -1194,9 +1158,11 @@
 
   vals = (GValue *) value->data[0].v_pointer;
   if (vals == NULL) {
-    gst_value_init_fraction_range (value);
-    vals = value->data[0].v_pointer;
+    value->data[0].v_pointer = vals = g_new0 (GValue, 2);
+    g_value_init (&vals[0], GST_TYPE_FRACTION);
+    g_value_init (&vals[1], GST_TYPE_FRACTION);
   }
+
   g_value_copy (start, &vals[0]);
   g_value_copy (end, &vals[1]);
 }
@@ -1241,7 +1207,7 @@
  *
  * Gets the minimum of the range specified by @value.
  *
- * Returns: the minimum of the range
+ * Returns: the minumum of the range
  */
 #ifdef __SYMBIAN32__
 EXPORT_C
@@ -1410,7 +1376,7 @@
   caps = gst_caps_from_string (s);
 
   if (caps) {
-    g_value_take_boxed (dest, caps);
+    g_value_set_boxed (dest, caps);
     return TRUE;
   }
   return FALSE;
@@ -1468,7 +1434,7 @@
 {
   GstStructure *structure = g_value_get_boxed (value);
 
-  return gst_string_take_and_wrap (gst_structure_to_string (structure));
+  return gst_structure_to_string (structure);
 }
 
 static gboolean
@@ -1476,20 +1442,10 @@
 {
   GstStructure *structure;
 
-  if (*s != '"') {
-    structure = gst_structure_from_string (s, NULL);
-  } else {
-    gchar *str = gst_string_unwrap (s);
-
-    if (G_UNLIKELY (!str))
-      return FALSE;
-
-    structure = gst_structure_from_string (str, NULL);
-    g_free (str);
-  }
-
-  if (G_LIKELY (structure)) {
-    g_value_take_boxed (dest, structure);
+  structure = gst_structure_from_string (s, NULL);
+
+  if (structure) {
+    g_value_set_boxed (dest, structure);
     return TRUE;
   }
   return FALSE;
@@ -1907,110 +1863,71 @@
 static gint
 gst_value_compare_string (const GValue * value1, const GValue * value2)
 {
-  if (G_UNLIKELY (!value1->data[0].v_pointer || !value2->data[0].v_pointer)) {
-    /* if only one is NULL, no match - otherwise both NULL == EQUAL */
-    if (value1->data[0].v_pointer != value2->data[0].v_pointer)
-      return GST_VALUE_UNORDERED;
-  } else {
-    int x = strcmp (value1->data[0].v_pointer, value2->data[0].v_pointer);
-
-    if (x < 0)
-      return GST_VALUE_LESS_THAN;
-    if (x > 0)
-      return GST_VALUE_GREATER_THAN;
-  }
-
+  int x = strcmp (value1->data[0].v_pointer, value2->data[0].v_pointer);
+
+  if (x < 0)
+    return GST_VALUE_LESS_THAN;
+  if (x > 0)
+    return GST_VALUE_GREATER_THAN;
   return GST_VALUE_EQUAL;
 }
 
-static int
-gst_string_measure_wrapping (const gchar * s)
+/* keep in sync with gststructure.c */
+#define GST_ASCII_IS_STRING(c) (g_ascii_isalnum((c)) || ((c) == '_') || \
+    ((c) == '-') || ((c) == '+') || ((c) == '/') || ((c) == ':') || \
+    ((c) == '.'))
+
+static gchar *
+gst_string_wrap (const gchar * s)
 {
+  const gchar *t;
   int len;
+  gchar *d, *e;
   gboolean wrap = FALSE;
 
-  if (G_UNLIKELY (s == NULL))
-    return -1;
-
-  /* Special case: the actual string NULL needs wrapping */
-  if (G_UNLIKELY (strcmp (s, "NULL") == 0))
-    return 4;
-
   len = 0;
-  while (*s) {
-    if (GST_ASCII_IS_STRING (*s)) {
+  t = s;
+  if (!s)
+    return NULL;
+  while (*t) {
+    if (GST_ASCII_IS_STRING (*t)) {
       len++;
-    } else if (*s < 0x20 || *s >= 0x7f) {
+    } else if (*t < 0x20 || *t >= 0x7f) {
       wrap = TRUE;
       len += 4;
     } else {
       wrap = TRUE;
       len += 2;
     }
-    s++;
+    t++;
   }
 
-  /* Wrap the string if we found something that needs
-   * wrapping, or the empty string (len == 0) */
-  return (wrap || len == 0) ? len : -1;
-}
-
-static gchar *
-gst_string_wrap_inner (const gchar * s, int len)
-{
-  gchar *d, *e;
+  if (!wrap)
+    return g_strdup (s);
 
   e = d = g_malloc (len + 3);
 
   *e++ = '\"';
-  while (*s) {
-    if (GST_ASCII_IS_STRING (*s)) {
-      *e++ = *s++;
-    } else if (*s < 0x20 || *s >= 0x7f) {
+  t = s;
+  while (*t) {
+    if (GST_ASCII_IS_STRING (*t)) {
+      *e++ = *t++;
+    } else if (*t < 0x20 || *t >= 0x7f) {
       *e++ = '\\';
-      *e++ = '0' + ((*(guchar *) s) >> 6);
-      *e++ = '0' + (((*s) >> 3) & 0x7);
-      *e++ = '0' + ((*s++) & 0x7);
+      *e++ = '0' + ((*(guchar *) t) >> 6);
+      *e++ = '0' + (((*t) >> 3) & 0x7);
+      *e++ = '0' + ((*t++) & 0x7);
     } else {
       *e++ = '\\';
-      *e++ = *s++;
+      *e++ = *t++;
     }
   }
   *e++ = '\"';
   *e = 0;
 
-  g_assert (e - d <= len + 3);
   return d;
 }
 
-/* Do string wrapping/escaping */
-static gchar *
-gst_string_wrap (const gchar * s)
-{
-  int len = gst_string_measure_wrapping (s);
-
-  if (G_LIKELY (len < 0))
-    return g_strdup (s);
-
-  return gst_string_wrap_inner (s, len);
-}
-
-/* Same as above, but take ownership of the string */
-static gchar *
-gst_string_take_and_wrap (gchar * s)
-{
-  gchar *out;
-  int len = gst_string_measure_wrapping (s);
-
-  if (G_LIKELY (len < 0))
-    return s;
-
-  out = gst_string_wrap_inner (s, len);
-  g_free (s);
-
-  return out;
-}
-
 /*
  * This function takes a string delimited with double quotes (")
  * and unescapes any \xxx octal numbers.
@@ -2088,7 +2005,7 @@
     goto beach;
 
   /* null terminate result string and return */
-  *write = '\0';
+  *write++ = '\0';
   return ret;
 
 beach:
@@ -2105,17 +2022,15 @@
 static gboolean
 gst_value_deserialize_string (GValue * dest, const gchar * s)
 {
-  if (G_UNLIKELY (strcmp (s, "NULL") == 0)) {
-    g_value_set_string (dest, NULL);
-    return TRUE;
-  } else if (G_LIKELY (*s != '"')) {
+  if (*s != '"') {
     if (!g_utf8_validate (s, -1, NULL))
       return FALSE;
     g_value_set_string (dest, s);
     return TRUE;
   } else {
     gchar *str = gst_string_unwrap (s);
-    if (G_UNLIKELY (!str))
+
+    if (!str)
       return FALSE;
     g_value_take_string (dest, str);
   }
@@ -2535,8 +2450,8 @@
 }
 
 static gboolean
-gst_value_intersect_fraction_range_fraction_range (GValue * dest,
-    const GValue * src1, const GValue * src2)
+    gst_value_intersect_fraction_range_fraction_range
+    (GValue * dest, const GValue * src1, const GValue * src2)
 {
   GValue *min;
   GValue *max;
@@ -2778,9 +2693,6 @@
   guint i, size;
   GValue subtraction = { 0, };
   gboolean ret = FALSE;
-  GType ltype;
-
-  ltype = gst_value_list_get_type ();
 
   size = gst_value_list_get_size (minuend);
   for (i = 0; i < size; i++) {
@@ -2790,8 +2702,15 @@
       if (!ret) {
         gst_value_init_and_copy (dest, &subtraction);
         ret = TRUE;
-      } else if (G_VALUE_HOLDS (dest, ltype)
-          && !G_VALUE_HOLDS (&subtraction, ltype)) {
+      } else if (GST_VALUE_HOLDS_LIST (dest)
+          && GST_VALUE_HOLDS_LIST (&subtraction)) {
+        /* unroll */
+        GValue unroll = { 0, };
+
+        gst_value_init_and_copy (&unroll, dest);
+        g_value_unset (dest);
+        gst_value_list_concat (dest, &unroll, &subtraction);
+      } else if (GST_VALUE_HOLDS_LIST (dest)) {
         gst_value_list_append_value (dest, &subtraction);
       } else {
         GValue temp = { 0, };
@@ -2938,46 +2857,6 @@
  * comparison *
  **************/
 
-/*
- * gst_value_get_compare_func:
- * @value1: a value to get the compare function for
- *
- * Determines the compare function to be used with values of the same type as
- * @value1. The function can be given to gst_value_compare_with_func().
- *
- * Returns: A #GstValueCompareFunc value
- */
-static GstValueCompareFunc
-gst_value_get_compare_func (const GValue * value1)
-{
-  GstValueTable *table, *best = NULL;
-  guint i;
-  GType type1;
-
-  type1 = G_VALUE_TYPE (value1);
-
-  /* this is a fast check */
-  best = gst_value_hash_lookup_type (type1);
-
-  /* slower checks */
-  if (G_UNLIKELY (!best || !best->compare)) {
-    guint len = gst_value_table->len;
-
-    best = NULL;
-    for (i = 0; i < len; i++) {
-      table = &g_array_index (gst_value_table, GstValueTable, i);
-      if (table->compare && g_type_is_a (type1, table->type)) {
-        if (!best || g_type_is_a (table->type, best->type))
-          best = table;
-      }
-    }
-  }
-  if (G_LIKELY (best))
-    return best->compare;
-
-  return NULL;
-}
-
 /**
  * gst_value_can_compare:
  * @value1: a value to compare
@@ -2994,10 +2873,51 @@
 gboolean
 gst_value_can_compare (const GValue * value1, const GValue * value2)
 {
+  GstValueTable *table;
+  guint i;
+
   if (G_VALUE_TYPE (value1) != G_VALUE_TYPE (value2))
     return FALSE;
 
-  return gst_value_get_compare_func (value1) != NULL;
+  for (i = 0; i < gst_value_table->len; i++) {
+    table = &g_array_index (gst_value_table, GstValueTable, i);
+    if (g_type_is_a (G_VALUE_TYPE (value1), table->type) && table->compare)
+      return TRUE;
+  }
+
+  return FALSE;
+}
+
+/*
+ * gst_value_get_compare_func:
+ * @value1: a value to get the compare function for
+ *
+ * Determines the compare function to be used with values of the same type as
+ * @value1. The function can be given to gst_value_compare_with_func().
+ *
+ * Returns: A #GstValueCompareFunc value
+ */
+static GstValueCompareFunc
+gst_value_get_compare_func (const GValue * value1)
+{
+  GstValueTable *table, *best = NULL;
+  guint i;
+
+  for (i = 0; i < gst_value_table->len; i++) {
+    table = &g_array_index (gst_value_table, GstValueTable, i);
+    if (table->type == G_VALUE_TYPE (value1) && table->compare != NULL) {
+      best = table;
+      break;
+    }
+    if (g_type_is_a (G_VALUE_TYPE (value1), table->type)) {
+      if (!best || g_type_is_a (table->type, best->type))
+        best = table;
+    }
+  }
+  if (best) {
+    return best->compare;
+  }
+  return NULL;
 }
 
 /**
@@ -3015,8 +2935,7 @@
  */
 #ifdef __SYMBIAN32__
 EXPORT_C
-#endif
-
+#endif 
 gint
 gst_value_compare (const GValue * value1, const GValue * value2)
 {
@@ -3085,11 +3004,9 @@
 gst_value_can_union (const GValue * value1, const GValue * value2)
 {
   GstValueUnionInfo *union_info;
-  guint i, len;
-
-  len = gst_value_union_funcs->len;
-
-  for (i = 0; i < len; i++) {
+  guint i;
+
+  for (i = 0; i < gst_value_union_funcs->len; i++) {
     union_info = &g_array_index (gst_value_union_funcs, GstValueUnionInfo, i);
     if (union_info->type1 == G_VALUE_TYPE (value1) &&
         union_info->type2 == G_VALUE_TYPE (value2))
@@ -3121,11 +3038,9 @@
 gst_value_union (GValue * dest, const GValue * value1, const GValue * value2)
 {
   GstValueUnionInfo *union_info;
-  guint i, len;
-
-  len = gst_value_union_funcs->len;
-
-  for (i = 0; i < len; i++) {
+  guint i;
+
+  for (i = 0; i < gst_value_union_funcs->len; i++) {
     union_info = &g_array_index (gst_value_union_funcs, GstValueUnionInfo, i);
     if (union_info->type1 == G_VALUE_TYPE (value1) &&
         union_info->type2 == G_VALUE_TYPE (value2)) {
@@ -3196,31 +3111,20 @@
 gst_value_can_intersect (const GValue * value1, const GValue * value2)
 {
   GstValueIntersectInfo *intersect_info;
-  guint i, len;
-  GType ltype, type1, type2;
-
-  ltype = gst_value_list_get_type ();
+  guint i;
 
   /* special cases */
-  if (G_VALUE_HOLDS (value1, ltype) || G_VALUE_HOLDS (value2, ltype))
+  if (GST_VALUE_HOLDS_LIST (value1) || GST_VALUE_HOLDS_LIST (value2))
     return TRUE;
 
-  type1 = G_VALUE_TYPE (value1);
-  type2 = G_VALUE_TYPE (value2);
-
-  /* practically all GstValue types have a compare function (_can_compare=TRUE)
-   * GstStructure and GstCaps have npot, but are intersectable */
-  if (type1 == type2)
-    return TRUE;
-
-  /* check registered intersect functions */
-  len = gst_value_intersect_funcs->len;
-  for (i = 0; i < len; i++) {
+  for (i = 0; i < gst_value_intersect_funcs->len; i++) {
     intersect_info = &g_array_index (gst_value_intersect_funcs,
         GstValueIntersectInfo, i);
-    if ((intersect_info->type1 == type1 && intersect_info->type2 == type2) ||
-        (intersect_info->type1 == type2 && intersect_info->type2 == type1))
-      return TRUE;
+    if (intersect_info->type1 == G_VALUE_TYPE (value1) &&
+        intersect_info->type2 == G_VALUE_TYPE (value2))
+      if (intersect_info->type2 == G_VALUE_TYPE (value1) &&
+          intersect_info->type1 == G_VALUE_TYPE (value2))
+        return TRUE;
   }
 
   return gst_value_can_compare (value1, value2);
@@ -3249,37 +3153,36 @@
     const GValue * value2)
 {
   GstValueIntersectInfo *intersect_info;
-  guint i, len;
-  GType ltype, type1, type2;
-
-  ltype = gst_value_list_get_type ();
+  guint i;
+  gboolean ret = FALSE;
 
   /* special cases first */
-  if (G_VALUE_HOLDS (value1, ltype))
+  if (GST_VALUE_HOLDS_LIST (value1))
     return gst_value_intersect_list (dest, value1, value2);
-  if (G_VALUE_HOLDS (value2, ltype))
+  if (GST_VALUE_HOLDS_LIST (value2))
     return gst_value_intersect_list (dest, value2, value1);
 
+  for (i = 0; i < gst_value_intersect_funcs->len; i++) {
+    intersect_info = &g_array_index (gst_value_intersect_funcs,
+        GstValueIntersectInfo, i);
+    if (intersect_info->type1 == G_VALUE_TYPE (value1) &&
+        intersect_info->type2 == G_VALUE_TYPE (value2)) {
+      ret = intersect_info->func (dest, value1, value2);
+      return ret;
+    }
+    if (intersect_info->type1 == G_VALUE_TYPE (value2) &&
+        intersect_info->type2 == G_VALUE_TYPE (value1)) {
+      ret = intersect_info->func (dest, value2, value1);
+      return ret;
+    }
+  }
+
   if (gst_value_compare (value1, value2) == GST_VALUE_EQUAL) {
     gst_value_init_and_copy (dest, value1);
-    return TRUE;
+    ret = TRUE;
   }
 
-  type1 = G_VALUE_TYPE (value1);
-  type2 = G_VALUE_TYPE (value2);
-
-  len = gst_value_intersect_funcs->len;
-  for (i = 0; i < len; i++) {
-    intersect_info = &g_array_index (gst_value_intersect_funcs,
-        GstValueIntersectInfo, i);
-    if (intersect_info->type1 == type1 && intersect_info->type2 == type2) {
-      return intersect_info->func (dest, value1, value2);
-    }
-    if (intersect_info->type1 == type2 && intersect_info->type2 == type1) {
-      return intersect_info->func (dest, value2, value1);
-    }
-  }
-  return FALSE;
+  return ret;
 }
 
 /**
@@ -3336,24 +3239,18 @@
     const GValue * subtrahend)
 {
   GstValueSubtractInfo *info;
-  guint i, len;
-  GType ltype, mtype, stype;
-
-  ltype = gst_value_list_get_type ();
+  guint i;
 
   /* special cases first */
-  if (G_VALUE_HOLDS (minuend, ltype))
+  if (GST_VALUE_HOLDS_LIST (minuend))
     return gst_value_subtract_from_list (dest, minuend, subtrahend);
-  if (G_VALUE_HOLDS (subtrahend, ltype))
+  if (GST_VALUE_HOLDS_LIST (subtrahend))
     return gst_value_subtract_list (dest, minuend, subtrahend);
 
-  mtype = G_VALUE_TYPE (minuend);
-  stype = G_VALUE_TYPE (subtrahend);
-
-  len = gst_value_subtract_funcs->len;
-  for (i = 0; i < len; i++) {
+  for (i = 0; i < gst_value_subtract_funcs->len; i++) {
     info = &g_array_index (gst_value_subtract_funcs, GstValueSubtractInfo, i);
-    if (info->minuend == mtype && info->subtrahend == stype) {
+    if (info->minuend == G_VALUE_TYPE (minuend) &&
+        info->subtrahend == G_VALUE_TYPE (subtrahend)) {
       return info->func (dest, minuend, subtrahend);
     }
   }
@@ -3397,22 +3294,16 @@
 gst_value_can_subtract (const GValue * minuend, const GValue * subtrahend)
 {
   GstValueSubtractInfo *info;
-  guint i, len;
-  GType ltype, mtype, stype;
-
-  ltype = gst_value_list_get_type ();
+  guint i;
 
   /* special cases */
-  if (G_VALUE_HOLDS (minuend, ltype) || G_VALUE_HOLDS (subtrahend, ltype))
+  if (GST_VALUE_HOLDS_LIST (minuend) || GST_VALUE_HOLDS_LIST (subtrahend))
     return TRUE;
 
-  mtype = G_VALUE_TYPE (minuend);
-  stype = G_VALUE_TYPE (subtrahend);
-
-  len = gst_value_subtract_funcs->len;
-  for (i = 0; i < len; i++) {
+  for (i = 0; i < gst_value_subtract_funcs->len; i++) {
     info = &g_array_index (gst_value_subtract_funcs, GstValueSubtractInfo, i);
-    if (info->minuend == mtype && info->subtrahend == stype)
+    if (info->minuend == G_VALUE_TYPE (minuend) &&
+        info->subtrahend == G_VALUE_TYPE (subtrahend))
       return TRUE;
   }
 
@@ -3458,7 +3349,7 @@
  * @table: structure containing functions to register
  *
  * Registers functions to perform calculations on #GValues of a given
- * type. Each type can only be added once.
+ * type.
  */
 #ifdef __SYMBIAN32__
 EXPORT_C
@@ -3467,17 +3358,7 @@
 void
 gst_value_register (const GstValueTable * table)
 {
-  GstValueTable *found;
-
   g_array_append_val (gst_value_table, *table);
-
-  found = gst_value_hash_lookup_type (table->type);
-  if (found)
-    g_warning ("adding type %s multiple times", g_type_name (table->type));
-
-  /* FIXME: we're not really doing the const justice, we assume the table is
-   * static */
-  gst_value_hash_add_type (table->type, table);
 }
 
 /**
@@ -3515,30 +3396,27 @@
 gchar *
 gst_value_serialize (const GValue * value)
 {
-  guint i, len;
+  guint i;
   GValue s_val = { 0 };
-  GstValueTable *table, *best;
+  GstValueTable *table, *best = NULL;
   char *s;
-  GType type;
 
   g_return_val_if_fail (G_IS_VALUE (value), NULL);
 
-  type = G_VALUE_TYPE (value);
-
-  best = gst_value_hash_lookup_type (type);
-
-  if (G_UNLIKELY (!best || !best->serialize)) {
-    len = gst_value_table->len;
-    best = NULL;
-    for (i = 0; i < len; i++) {
-      table = &g_array_index (gst_value_table, GstValueTable, i);
-      if (table->serialize && g_type_is_a (type, table->type)) {
-        if (!best || g_type_is_a (table->type, best->type))
-          best = table;
-      }
+  for (i = 0; i < gst_value_table->len; i++) {
+    table = &g_array_index (gst_value_table, GstValueTable, i);
+    if (table->serialize == NULL)
+      continue;
+    if (table->type == G_VALUE_TYPE (value)) {
+      best = table;
+      break;
+    }
+    if (g_type_is_a (G_VALUE_TYPE (value), table->type)) {
+      if (!best || g_type_is_a (table->type, best->type))
+        best = table;
     }
   }
-  if (G_LIKELY (best))
+  if (best)
     return best->serialize (value);
 
   g_value_init (&s_val, G_TYPE_STRING);
@@ -3569,29 +3447,30 @@
 gboolean
 gst_value_deserialize (GValue * dest, const gchar * src)
 {
-  GstValueTable *table, *best;
-  guint i, len;
-  GType type;
+  GstValueTable *table, *best = NULL;
+  guint i;
 
   g_return_val_if_fail (src != NULL, FALSE);
   g_return_val_if_fail (G_IS_VALUE (dest), FALSE);
 
-  type = G_VALUE_TYPE (dest);
-
-  best = gst_value_hash_lookup_type (type);
-  if (G_UNLIKELY (!best || !best->deserialize)) {
-    len = gst_value_table->len;
-    best = NULL;
-    for (i = 0; i < len; i++) {
-      table = &g_array_index (gst_value_table, GstValueTable, i);
-      if (table->deserialize && g_type_is_a (type, table->type)) {
-        if (!best || g_type_is_a (table->type, best->type))
-          best = table;
-      }
+  for (i = 0; i < gst_value_table->len; i++) {
+    table = &g_array_index (gst_value_table, GstValueTable, i);
+    if (table->serialize == NULL)
+      continue;
+
+    if (table->type == G_VALUE_TYPE (dest)) {
+      best = table;
+      break;
+    }
+
+    if (g_type_is_a (G_VALUE_TYPE (dest), table->type)) {
+      if (!best || g_type_is_a (table->type, best->type))
+        best = table;
     }
   }
-  if (G_LIKELY (best))
+  if (best) {
     return best->deserialize (dest, src);
+  }
 
   return FALSE;
 }
@@ -3617,11 +3496,6 @@
 {
   GType type = G_VALUE_TYPE (value);
 
-  /* the most common types are just basic plain glib types */
-  if (type <= G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_GLIB_LAST)) {
-    return TRUE;
-  }
-
   if (type == GST_TYPE_ARRAY) {
     gint size, n;
     const GValue *kid;
@@ -3635,6 +3509,7 @@
     }
     return TRUE;
   }
+
   return gst_type_is_fixed (type);
 }
 
@@ -4208,15 +4083,9 @@
   gchar *str;
 
   obj = g_value_get_object (src_value);
-  if (obj) {
-    str =
-        g_strdup_printf ("(%s) %s", G_OBJECT_TYPE_NAME (obj),
-        GST_OBJECT_NAME (obj));
-  } else {
-    str = g_strdup ("NULL");
-  }
-
-  dest_value->data[0].v_pointer = str;
+  str = obj ? GST_OBJECT_NAME (obj) : "NULL";
+
+  dest_value->data[0].v_pointer = g_strdup (str);
 }
 
 static GTypeInfo _info = {
@@ -4373,7 +4242,6 @@
 _gst_value_initialize (void)
 {
   gst_value_table = g_array_new (FALSE, FALSE, sizeof (GstValueTable));
-  gst_value_hash = g_hash_table_new (NULL, NULL);
   gst_value_union_funcs = g_array_new (FALSE, FALSE,
       sizeof (GstValueUnionInfo));
   gst_value_intersect_funcs = g_array_new (FALSE, FALSE,
@@ -4449,7 +4317,7 @@
       gst_value_deserialize_array,
     };
 
-    gst_value.type = gst_value_array_get_type ();
+    gst_value.type = gst_value_array_get_type ();;
     gst_value_register (&gst_value);
   }