--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gstreamer_core/gst/gstformat.c	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,300 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wim.taymans@chello.be>
+ *                    2005 Wim Taymans <wim@fluendo.com>
+ *
+ * gstformat.c: GstFormat registration
+ *
+ * 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.
+ */
+
+/**
+ * SECTION:gstformat
+ * @short_description: Dynamically register new data formats
+ * @see_also: #GstPad, #GstElement
+ *
+ * GstFormats functions are used to register a new format to the gstreamer
+ * core.  Formats can be used to perform seeking or conversions/query
+ * operations.
+ */
+
+
+#include "gst_private.h"
+#include <string.h>
+#include "gstformat.h"
+#include "gstenumtypes.h"
+
+#ifdef __SYMBIAN32__
+#include <glib_global.h>
+#endif
+
+static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
+static GList *_gst_formats = NULL;
+static GHashTable *_nick_to_format = NULL;
+static GHashTable *_format_to_nick = NULL;
+static guint32 _n_values = 1;   /* we start from 1 because 0 reserved for UNDEFINED */
+
+static GstFormatDefinition standard_definitions[] = {
+  {GST_FORMAT_DEFAULT, "default", "Default format for the media type", 0},
+  {GST_FORMAT_BYTES, "bytes", "Bytes", 0},
+  {GST_FORMAT_TIME, "time", "Time", 0},
+  {GST_FORMAT_BUFFERS, "buffers", "Buffers", 0},
+  {GST_FORMAT_PERCENT, "percent", "Percent", 0},
+  {0, NULL, NULL, 0}
+};
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+_gst_format_initialize (void)
+{
+  GstFormatDefinition *standards = standard_definitions;
+
+  g_static_mutex_lock (&mutex);
+  if (_nick_to_format == NULL) {
+    _nick_to_format = g_hash_table_new (g_str_hash, g_str_equal);
+    _format_to_nick = g_hash_table_new (NULL, NULL);
+  }
+
+  while (standards->nick) {
+    standards->quark = g_quark_from_static_string (standards->nick);
+    g_hash_table_insert (_nick_to_format, standards->nick, standards);
+    g_hash_table_insert (_format_to_nick, GINT_TO_POINTER (standards->value),
+        standards);
+
+    _gst_formats = g_list_append (_gst_formats, standards);
+    standards++;
+    _n_values++;
+  }
+  /* getting the type registers the enum */
+  g_type_class_ref (gst_format_get_type ());
+  g_static_mutex_unlock (&mutex);
+}
+
+/**
+ * gst_format_get_name:
+ * @format: a #GstFormat
+ *
+ * Get a printable name for the given format. Do not modify or free.
+ *
+ * Returns: a reference to the static name of the format or NULL if
+ * the format is unknown.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+const gchar *
+gst_format_get_name (GstFormat format)
+{
+  const GstFormatDefinition *def;
+  const gchar *result;
+
+  if ((def = gst_format_get_details (format)) != NULL)
+    result = def->nick;
+  else
+    result = NULL;
+
+  return result;
+}
+
+/**
+ * gst_format_to_quark:
+ * @format: a #GstFormat
+ *
+ * Get the unique quark for the given format.
+ *
+ * Returns: the quark associated with the format or 0 if the format
+ * is unknown.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GQuark
+gst_format_to_quark (GstFormat format)
+{
+  const GstFormatDefinition *def;
+  GQuark result;
+
+  if ((def = gst_format_get_details (format)) != NULL)
+    result = def->quark;
+  else
+    result = 0;
+
+  return result;
+}
+
+/**
+ * gst_format_register:
+ * @nick: The nick of the new format
+ * @description: The description of the new format
+ *
+ * Create a new GstFormat based on the nick or return an
+ * already registered format with that nick.
+ *
+ * Returns: A new GstFormat or an already registered format
+ * with the same nick.
+ *
+ * MT safe.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GstFormat
+gst_format_register (const gchar * nick, const gchar * description)
+{
+  GstFormatDefinition *format;
+  GstFormat query;
+
+  g_return_val_if_fail (nick != NULL, 0);
+  g_return_val_if_fail (description != NULL, 0);
+
+  query = gst_format_get_by_nick (nick);
+  if (query != GST_FORMAT_UNDEFINED)
+    return query;
+
+  g_static_mutex_lock (&mutex);
+  format = g_new0 (GstFormatDefinition, 1);
+  format->value = _n_values;
+  format->nick = g_strdup (nick);
+  format->description = g_strdup (description);
+  format->quark = g_quark_from_static_string (format->nick);
+
+  g_hash_table_insert (_nick_to_format, format->nick, format);
+  g_hash_table_insert (_format_to_nick, GINT_TO_POINTER (format->value),
+      format);
+  _gst_formats = g_list_append (_gst_formats, format);
+  _n_values++;
+  g_static_mutex_unlock (&mutex);
+
+  return format->value;
+}
+
+/**
+ * gst_format_get_by_nick:
+ * @nick: The nick of the format
+ *
+ * Return the format registered with the given nick.
+ *
+ * Returns: The format with @nick or GST_FORMAT_UNDEFINED
+ * if the format was not registered.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GstFormat
+gst_format_get_by_nick (const gchar * nick)
+{
+  GstFormatDefinition *format;
+
+  g_return_val_if_fail (nick != NULL, 0);
+
+  g_static_mutex_lock (&mutex);
+  format = g_hash_table_lookup (_nick_to_format, nick);
+  g_static_mutex_unlock (&mutex);
+
+  if (format != NULL)
+    return format->value;
+  else
+    return GST_FORMAT_UNDEFINED;
+}
+
+/**
+ * gst_formats_contains:
+ * @formats: The format array to search
+ * @format: the format to find
+ *
+ * See if the given format is inside the format array.
+ *
+ * Returns: TRUE if the format is found inside the array
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+gboolean
+gst_formats_contains (const GstFormat * formats, GstFormat format)
+{
+  if (!formats)
+    return FALSE;
+
+  while (*formats) {
+    if (*formats == format)
+      return TRUE;
+
+    formats++;
+  }
+  return FALSE;
+}
+
+
+/**
+ * gst_format_get_details:
+ * @format: The format to get details of
+ *
+ * Get details about the given format.
+ *
+ * Returns: The #GstFormatDefinition for @format or NULL on failure.
+ *
+ * MT safe.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+const GstFormatDefinition *
+gst_format_get_details (GstFormat format)
+{
+  const GstFormatDefinition *result;
+
+  g_static_mutex_lock (&mutex);
+  result = g_hash_table_lookup (_format_to_nick, GINT_TO_POINTER (format));
+  g_static_mutex_unlock (&mutex);
+
+  return result;
+}
+
+/**
+ * gst_format_iterate_definitions:
+ *
+ * Iterate all the registered formats. The format definition is read
+ * only.
+ *
+ * Returns: A GstIterator of #GstFormatDefinition.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GstIterator *
+gst_format_iterate_definitions (void)
+{
+  GstIterator *result;
+
+  g_static_mutex_lock (&mutex);
+  /* FIXME: register a boxed type for GstFormatDefinition */
+  result = gst_iterator_new_list (G_TYPE_POINTER,
+      g_static_mutex_get_mutex (&mutex), &_n_values, &_gst_formats,
+      NULL, NULL, NULL);
+  g_static_mutex_unlock (&mutex);
+
+  return result;
+}