gstreamer_core/gst/gstinfo.c
changeset 0 0e761a78d257
child 8 4a7fac7dd34a
child 29 567bb019e3e3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gstreamer_core/gst/gstinfo.c	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,1569 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wtay@chello.be>
+ *                    2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
+ *
+ * gstinfo.c: debugging functions
+ *
+ * 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:gstinfo
+ * @short_description: Debugging and logging facilities
+ * @see_also: #GstConfig, #Gst for command line parameters
+ * and environment variables that affect the debugging output.
+ *
+ * GStreamer's debugging subsystem is an easy way to get information about what
+ * the application is doing.  It is not meant for programming errors. Use GLib
+ * methods (g_warning and friends) for that.
+ *
+ * The debugging subsystem works only after GStreamer has been initialized
+ * - for example by calling gst_init().
+ *
+ * The debugging subsystem is used to log informational messages while the
+ * application runs.  Each messages has some properties attached to it. Among
+ * these properties are the debugging category, the severity (called "level"
+ * here) and an optional #GObject it belongs to. Each of these messages is sent
+ * to all registered debugging handlers, which then handle the messages.
+ * GStreamer attaches a default handler on startup, which outputs requested
+ * messages to stderr.
+ *
+ * Messages are output by using shortcut macros like #GST_DEBUG,
+ * #GST_CAT_ERROR_OBJECT or similar. These all expand to calling gst_debug_log()
+ * with the right parameters.
+ * The only thing a developer will probably want to do is define his own
+ * categories. This is easily done with 3 lines. At the top of your code,
+ * declare
+ * the variables and set the default category.
+ * <informalexample>
+ * <programlisting>
+ * GST_DEBUG_CATEGORY_STATIC (my_category);     // define category (statically)
+ * &hash;define GST_CAT_DEFAULT my_category     // set as default
+ * </programlisting>
+ * </informalexample>
+ * After that you only need to initialize the category.
+ * <informalexample>
+ * <programlisting>
+ * GST_DEBUG_CATEGORY_INIT (my_category, "my category",
+ *                          0, "This is my very own");
+ * </programlisting>
+ * </informalexample>
+ * Initialization must be done before the category is used first.
+ * Plugins do this
+ * in their plugin_init function, libraries and applications should do that
+ * during their initialization.
+ *
+ * The whole debugging subsystem can be disabled at build time with passing the
+ * --disable-gst-debug switch to configure. If this is done, every function,
+ * macro and even structs described in this file evaluate to default values or
+ * nothing at all.
+ * So don't take addresses of these functions or use other tricks.
+ * If you must do that for some reason, there is still an option.
+ * If the debugging
+ * subsystem was compiled out, #GST_DISABLE_GST_DEBUG is defined in
+ * &lt;gst/gst.h&gt;,
+ * so you can check that before doing your trick.
+ * Disabling the debugging subsystem will give you a slight (read: unnoticeable)
+ * speed increase and will reduce the size of your compiled code. The GStreamer
+ * library itself becomes around 10% smaller.
+ *
+ * Please note that there are naming conventions for the names of debugging
+ * categories. These are explained at GST_DEBUG_CATEGORY_INIT().
+ */
+
+#include "gst_private.h"
+#include "gstinfo.h"
+
+#ifndef GST_DISABLE_GST_DEBUG
+
+#ifdef HAVE_DLFCN_H
+#  include <dlfcn.h>
+#endif
+#ifdef HAVE_PRINTF_EXTENSION
+#  include <printf.h>
+#endif
+#include <stdio.h>              /* fprintf */
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>           /* getpid on UNIX */
+#endif
+#ifdef HAVE_PROCESS_H
+#  include <process.h>          /* getpid on win32 */
+#endif
+#include <string.h>             /* G_VA_COPY */
+
+#include "gst_private.h"
+#include "gstutils.h"
+#include "gstsegment.h"
+#ifdef HAVE_VALGRIND
+#  include <valgrind/valgrind.h>
+#endif
+#include <glib/gprintf.h>       /* g_sprintf */
+
+#ifdef __SYMBIAN32__
+#include <glib_global.h>
+#endif
+
+/* underscore is to prevent conflict with GST_CAT_DEBUG define */
+GST_DEBUG_CATEGORY_STATIC (_GST_CAT_DEBUG);
+
+/* time of initialization, so we get useful debugging output times
+ * FIXME: we use this in gstdebugutils.c, what about a function + macro to
+ * get the running time: GST_DEBUG_RUNNING_TIME
+ */
+GstClockTime _priv_gst_info_start_time;
+
+#if 0
+#if defined __sgi__
+#include <rld_interface.h>
+typedef struct DL_INFO
+{
+  const char *dli_fname;
+  void *dli_fbase;
+  const char *dli_sname;
+  void *dli_saddr;
+  int dli_version;
+  int dli_reserved1;
+  long dli_reserved[4];
+}
+Dl_info;
+
+#define _RLD_DLADDR             14
+int dladdr (void *address, Dl_info * dl);
+
+int
+dladdr (void *address, Dl_info * dl)
+{
+  void *v;
+
+  v = _rld_new_interface (_RLD_DLADDR, address, dl);
+  return (int) v;
+}
+#endif /* __sgi__ */
+#endif
+
+static void gst_debug_reset_threshold (gpointer category, gpointer unused);
+static void gst_debug_reset_all_thresholds (void);
+
+#ifdef HAVE_PRINTF_EXTENSION
+static int _gst_info_printf_extension_ptr (FILE * stream,
+    const struct printf_info *info, const void *const *args);
+static int _gst_info_printf_extension_segment (FILE * stream,
+    const struct printf_info *info, const void *const *args);
+static int _gst_info_printf_extension_arginfo (const struct printf_info *info,
+    size_t n, int *argtypes);
+#endif
+
+struct _GstDebugMessage
+{
+  gchar *message;
+  const gchar *format;
+  va_list arguments;
+};
+
+/* list of all name/level pairs from --gst-debug and GST_DEBUG */
+static GStaticMutex __level_name_mutex = G_STATIC_MUTEX_INIT;
+static GSList *__level_name = NULL;
+typedef struct
+{
+  GPatternSpec *pat;
+  GstDebugLevel level;
+}
+LevelNameEntry;
+
+/* list of all categories */
+static GStaticMutex __cat_mutex = G_STATIC_MUTEX_INIT;
+static GSList *__categories = NULL;
+
+/* all registered debug handlers */
+typedef struct
+{
+  GstLogFunction func;
+  gpointer user_data;
+}
+LogFuncEntry;
+static GStaticMutex __log_func_mutex = G_STATIC_MUTEX_INIT;
+static GSList *__log_functions = NULL;
+
+static gint __default_level;
+static gint __use_color;
+
+/* disabled by default, as soon as some threshold is set > NONE,
+ * it becomes enabled. */
+gboolean __gst_debug_enabled = FALSE;
+GstDebugLevel __gst_debug_min = GST_LEVEL_NONE;
+
+GstDebugCategory *GST_CAT_DEFAULT = NULL;
+
+GstDebugCategory *GST_CAT_GST_INIT = NULL;
+GstDebugCategory *GST_CAT_AUTOPLUG = NULL;
+GstDebugCategory *GST_CAT_AUTOPLUG_ATTEMPT = NULL;
+GstDebugCategory *GST_CAT_PARENTAGE = NULL;
+GstDebugCategory *GST_CAT_STATES = NULL;
+GstDebugCategory *GST_CAT_SCHEDULING = NULL;
+
+GstDebugCategory *GST_CAT_BUFFER = NULL;
+GstDebugCategory *GST_CAT_BUS = NULL;
+GstDebugCategory *GST_CAT_CAPS = NULL;
+GstDebugCategory *GST_CAT_CLOCK = NULL;
+GstDebugCategory *GST_CAT_ELEMENT_PADS = NULL;
+GstDebugCategory *GST_CAT_PADS = NULL;
+GstDebugCategory *GST_CAT_PIPELINE = NULL;
+GstDebugCategory *GST_CAT_PLUGIN_LOADING = NULL;
+GstDebugCategory *GST_CAT_PLUGIN_INFO = NULL;
+GstDebugCategory *GST_CAT_PROPERTIES = NULL;
+GstDebugCategory *GST_CAT_TYPES = NULL;
+GstDebugCategory *GST_CAT_XML = NULL;
+GstDebugCategory *GST_CAT_NEGOTIATION = NULL;
+GstDebugCategory *GST_CAT_REFCOUNTING = NULL;
+GstDebugCategory *GST_CAT_ERROR_SYSTEM = NULL;
+GstDebugCategory *GST_CAT_EVENT = NULL;
+GstDebugCategory *GST_CAT_MESSAGE = NULL;
+GstDebugCategory *GST_CAT_PARAMS = NULL;
+GstDebugCategory *GST_CAT_CALL_TRACE = NULL;
+GstDebugCategory *GST_CAT_SIGNAL = NULL;
+GstDebugCategory *GST_CAT_PROBE = NULL;
+GstDebugCategory *GST_CAT_REGISTRY = NULL;
+GstDebugCategory *GST_CAT_QOS = NULL;
+
+/* FIXME: export this? */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+gboolean
+_priv_gst_in_valgrind (void)
+{
+  static enum
+  {
+    GST_VG_UNCHECKED,
+    GST_VG_NO_VALGRIND,
+    GST_VG_INSIDE
+  }
+  in_valgrind = GST_VG_UNCHECKED;
+
+  if (in_valgrind == GST_VG_UNCHECKED) {
+#ifdef HAVE_VALGRIND
+    if (RUNNING_ON_VALGRIND) {
+      GST_CAT_INFO (GST_CAT_GST_INIT, "we're running inside valgrind");
+      printf ("GStreamer has detected that it is running inside valgrind.\n");
+      printf ("It might now take different code paths to ease debugging.\n");
+      printf ("Of course, this may also lead to different bugs.\n");
+      in_valgrind = GST_VG_INSIDE;
+    } else {
+      GST_CAT_LOG (GST_CAT_GST_INIT, "not doing extra valgrind stuff");
+      in_valgrind = GST_VG_NO_VALGRIND;
+    }
+#else
+    in_valgrind = GST_VG_NO_VALGRIND;
+#endif
+    g_assert (in_valgrind == GST_VG_NO_VALGRIND ||
+        in_valgrind == GST_VG_INSIDE);
+  }
+  return (in_valgrind == GST_VG_INSIDE) ? TRUE : FALSE;
+}
+
+/**
+ * _gst_debug_init:
+ *
+ * Initializes the debugging system.
+ * Normally you don't want to call this, because gst_init() does it for you.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+_gst_debug_init (void)
+{
+  gst_atomic_int_set (&__default_level, GST_LEVEL_DEFAULT);
+  gst_atomic_int_set (&__use_color, 1);
+
+  /* get time we started for debugging messages */
+  _priv_gst_info_start_time = gst_util_get_timestamp ();
+
+#ifdef HAVE_PRINTF_EXTENSION
+  register_printf_function (GST_PTR_FORMAT[0], _gst_info_printf_extension_ptr,
+      _gst_info_printf_extension_arginfo);
+  register_printf_function (GST_SEGMENT_FORMAT[0],
+      _gst_info_printf_extension_segment, _gst_info_printf_extension_arginfo);
+#endif
+
+  /* do NOT use a single debug function before this line has been run */
+  GST_CAT_DEFAULT = _gst_debug_category_new ("default",
+      GST_DEBUG_UNDERLINE, NULL);
+  _GST_CAT_DEBUG = _gst_debug_category_new ("GST_DEBUG",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_YELLOW, "debugging subsystem");
+
+  gst_debug_add_log_function (gst_debug_log_default, NULL);
+
+  /* FIXME: add descriptions here */
+  GST_CAT_GST_INIT = _gst_debug_category_new ("GST_INIT",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_RED, NULL);
+  GST_CAT_AUTOPLUG = _gst_debug_category_new ("GST_AUTOPLUG",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_BLUE, NULL);
+  GST_CAT_AUTOPLUG_ATTEMPT = _gst_debug_category_new ("GST_AUTOPLUG_ATTEMPT",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_CYAN | GST_DEBUG_BG_BLUE, NULL);
+  GST_CAT_PARENTAGE = _gst_debug_category_new ("GST_PARENTAGE",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_RED, NULL);
+  GST_CAT_STATES = _gst_debug_category_new ("GST_STATES",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_RED, NULL);
+  GST_CAT_SCHEDULING = _gst_debug_category_new ("GST_SCHEDULING",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_MAGENTA, NULL);
+  GST_CAT_BUFFER = _gst_debug_category_new ("GST_BUFFER",
+      GST_DEBUG_BOLD | GST_DEBUG_BG_GREEN, NULL);
+  GST_CAT_BUS = _gst_debug_category_new ("GST_BUS", GST_DEBUG_BG_YELLOW, NULL);
+  GST_CAT_CAPS = _gst_debug_category_new ("GST_CAPS",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_BLUE, NULL);
+  GST_CAT_CLOCK = _gst_debug_category_new ("GST_CLOCK",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_YELLOW, NULL);
+  GST_CAT_ELEMENT_PADS = _gst_debug_category_new ("GST_ELEMENT_PADS",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_RED, NULL);
+  GST_CAT_PADS = _gst_debug_category_new ("GST_PADS",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_RED, NULL);
+  GST_CAT_PIPELINE = _gst_debug_category_new ("GST_PIPELINE",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_RED, NULL);
+  GST_CAT_PLUGIN_LOADING = _gst_debug_category_new ("GST_PLUGIN_LOADING",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_CYAN, NULL);
+  GST_CAT_PLUGIN_INFO = _gst_debug_category_new ("GST_PLUGIN_INFO",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_CYAN, NULL);
+  GST_CAT_PROPERTIES = _gst_debug_category_new ("GST_PROPERTIES",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_BLUE, NULL);
+  GST_CAT_TYPES = _gst_debug_category_new ("GST_TYPES",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_RED, NULL);
+  GST_CAT_XML = _gst_debug_category_new ("GST_XML",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_RED, NULL);
+  GST_CAT_NEGOTIATION = _gst_debug_category_new ("GST_NEGOTIATION",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_BLUE, NULL);
+  GST_CAT_REFCOUNTING = _gst_debug_category_new ("GST_REFCOUNTING",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_RED | GST_DEBUG_BG_BLUE, NULL);
+  GST_CAT_ERROR_SYSTEM = _gst_debug_category_new ("GST_ERROR_SYSTEM",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_RED | GST_DEBUG_BG_WHITE, NULL);
+
+  GST_CAT_EVENT = _gst_debug_category_new ("GST_EVENT",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_BLUE, NULL);
+  GST_CAT_MESSAGE = _gst_debug_category_new ("GST_MESSAGE",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_RED, NULL);
+  GST_CAT_PARAMS = _gst_debug_category_new ("GST_PARAMS",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_BLACK | GST_DEBUG_BG_YELLOW, NULL);
+  GST_CAT_CALL_TRACE = _gst_debug_category_new ("GST_CALL_TRACE",
+      GST_DEBUG_BOLD, NULL);
+  GST_CAT_SIGNAL = _gst_debug_category_new ("GST_SIGNAL",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_RED, NULL);
+  GST_CAT_PROBE = _gst_debug_category_new ("GST_PROBE",
+      GST_DEBUG_BOLD | GST_DEBUG_FG_GREEN, "pad probes");
+  GST_CAT_REGISTRY = _gst_debug_category_new ("GST_REGISTRY", 0, "registry");
+  GST_CAT_QOS = _gst_debug_category_new ("GST_QOS", 0, "QoS");
+
+
+  /* print out the valgrind message if we're in valgrind */
+  _priv_gst_in_valgrind ();
+}
+
+/* we can't do this further above, because we initialize the GST_CAT_DEFAULT struct */
+#define GST_CAT_DEFAULT _GST_CAT_DEBUG
+
+/**
+ * gst_debug_log:
+ * @category: category to log
+ * @level: level of the message is in
+ * @file: the file that emitted the message, usually the __FILE__ identifier
+ * @function: the function that emitted the message
+ * @line: the line from that the message was emitted, usually __LINE__
+ * @object: the object this message relates to or NULL if none
+ * @format: a printf style format string
+ * @...: optional arguments for the format
+ *
+ * Logs the given message using the currently registered debugging handlers.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_log (GstDebugCategory * category, GstDebugLevel level,
+    const gchar * file, const gchar * function, gint line,
+    GObject * object, const gchar * format, ...)
+{
+  va_list var_args;
+
+  va_start (var_args, format);
+  gst_debug_log_valist (category, level, file, function, line, object, format,
+      var_args);
+  va_end (var_args);
+}
+
+/**
+ * gst_debug_log_valist:
+ * @category: category to log
+ * @level: level of the message is in
+ * @file: the file that emitted the message, usually the __FILE__ identifier
+ * @function: the function that emitted the message
+ * @line: the line from that the message was emitted, usually __LINE__
+ * @object: the object this message relates to or NULL if none
+ * @format: a printf style format string
+ * @args: optional arguments for the format
+ *
+ * Logs the given message using the currently registered debugging handlers.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_log_valist (GstDebugCategory * category, GstDebugLevel level,
+    const gchar * file, const gchar * function, gint line,
+    GObject * object, const gchar * format, va_list args)
+{
+  GstDebugMessage message;
+  LogFuncEntry *entry;
+  GSList *handler;
+
+  g_return_if_fail (category != NULL);
+  g_return_if_fail (file != NULL);
+  g_return_if_fail (function != NULL);
+  g_return_if_fail (format != NULL);
+
+  message.message = NULL;
+  message.format = format;
+  G_VA_COPY (message.arguments, args);
+
+  handler = __log_functions;
+  while (handler) {
+    entry = handler->data;
+    handler = g_slist_next (handler);
+    entry->func (category, level, file, function, line, object, &message,
+        entry->user_data);
+  }
+  g_free (message.message);
+  va_end (message.arguments);
+}
+
+/**
+ * gst_debug_message_get:
+ * @message: a debug message
+ *
+ * Gets the string representation of a #GstDebugMessage. This function is used
+ * in debug handlers to extract the message.
+ *
+ * Returns: the string representation of a #GstDebugMessage.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+const gchar *
+gst_debug_message_get (GstDebugMessage * message)
+{
+  if (message->message == NULL) {
+    message->message = g_strdup_vprintf (message->format, message->arguments);
+  }
+  return message->message;
+}
+
+
+static gchar *
+gst_debug_print_object (gpointer ptr)
+{
+  GObject *object = (GObject *) ptr;
+
+#ifdef unused
+  /* This is a cute trick to detect unmapped memory, but is unportable,
+   * slow, screws around with madvise, and not actually that useful. */
+  {
+    int ret;
+
+    ret = madvise ((void *) ((unsigned long) ptr & (~0xfff)), 4096, 0);
+    if (ret == -1 && errno == ENOMEM) {
+      buffer = g_strdup_printf ("%p (unmapped memory)", ptr);
+    }
+  }
+#endif
+
+  /* nicely printed object */
+  if (object == NULL) {
+    return g_strdup ("(NULL)");
+  }
+  if (*(GType *) ptr == GST_TYPE_CAPS) {
+    return gst_caps_to_string ((GstCaps *) ptr);
+  }
+  if (*(GType *) ptr == GST_TYPE_STRUCTURE) {
+    return gst_structure_to_string ((GstStructure *) ptr);
+  }
+#ifdef USE_POISONING
+  if (*(guint32 *) ptr == 0xffffffff) {
+    return g_strdup_printf ("<poisoned@%p>", ptr);
+  }
+#endif
+  if (GST_IS_PAD (object) && GST_OBJECT_NAME (object)) {
+    return g_strdup_printf ("<%s:%s>", GST_DEBUG_PAD_NAME (object));
+  }
+  if (GST_IS_OBJECT (object) && GST_OBJECT_NAME (object)) {
+    return g_strdup_printf ("<%s>", GST_OBJECT_NAME (object));
+  }
+  if (G_IS_OBJECT (object)) {
+    return g_strdup_printf ("<%s@%p>", G_OBJECT_TYPE_NAME (object), object);
+  }
+  if (GST_IS_MESSAGE (object)) {
+    GstMessage *msg = GST_MESSAGE_CAST (object);
+    gchar *s, *ret;
+
+    if (msg->structure) {
+      s = gst_structure_to_string (msg->structure);
+    } else {
+      s = g_strdup ("(NULL)");
+    }
+
+    ret = g_strdup_printf ("%s message from element '%s': %s",
+        GST_MESSAGE_TYPE_NAME (msg), (msg->src != NULL) ?
+        GST_ELEMENT_NAME (msg->src) : "(NULL)", s);
+    g_free (s);
+    return ret;
+  }
+
+  return g_strdup_printf ("%p", ptr);
+}
+
+#ifdef HAVE_PRINTF_EXTENSION
+
+static gchar *
+gst_debug_print_segment (gpointer ptr)
+{
+  GstSegment *segment = (GstSegment *) ptr;
+
+  /* nicely printed segment */
+  if (segment == NULL) {
+    return g_strdup ("(NULL)");
+  }
+
+  switch (segment->format) {
+    case GST_FORMAT_UNDEFINED:{
+      return g_strdup_printf ("UNDEFINED segment");
+    }
+    case GST_FORMAT_TIME:{
+      return g_strdup_printf ("time segment start=%" GST_TIME_FORMAT
+          ", stop=%" GST_TIME_FORMAT ", last_stop=%" GST_TIME_FORMAT
+          ", duration=%" GST_TIME_FORMAT ", rate=%f, applied_rate=%f"
+          ", flags=0x%02x, time=%" GST_TIME_FORMAT ", accum=%" GST_TIME_FORMAT,
+          GST_TIME_ARGS (segment->start), GST_TIME_ARGS (segment->stop),
+          GST_TIME_ARGS (segment->last_stop), GST_TIME_ARGS (segment->duration),
+          segment->rate, segment->applied_rate, (guint) segment->flags,
+          GST_TIME_ARGS (segment->time), GST_TIME_ARGS (segment->accum));
+    }
+    default:{
+      const gchar *format_name;
+
+      format_name = gst_format_get_name (segment->format);
+      if (G_UNLIKELY (format_name == NULL))
+        format_name = "(UNKNOWN FORMAT)";
+      return g_strdup_printf ("%s segment start=%" G_GINT64_FORMAT
+          ", stop=%" G_GINT64_FORMAT ", last_stop=%" G_GINT64_FORMAT
+          ", duration=%" G_GINT64_FORMAT ", rate=%f, applied_rate=%f"
+          ", flags=0x%02x, time=%" GST_TIME_FORMAT ", accum=%" GST_TIME_FORMAT,
+          format_name, segment->start, segment->stop, segment->last_stop,
+          segment->duration, segment->rate, segment->applied_rate,
+          (guint) segment->flags, GST_TIME_ARGS (segment->time),
+          GST_TIME_ARGS (segment->accum));
+    }
+  }
+}
+
+#endif /* HAVE_PRINTF_EXTENSION */
+
+/**
+ * gst_debug_construct_term_color:
+ * @colorinfo: the color info
+ *
+ * Constructs a string that can be used for getting the desired color in color
+ * terminals.
+ * You need to free the string after use.
+ *
+ * Returns: a string containing the color definition
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+gchar *
+gst_debug_construct_term_color (guint colorinfo)
+{
+  GString *color;
+
+  color = g_string_new ("\033[00");
+
+  if (colorinfo & GST_DEBUG_BOLD) {
+    g_string_append_len (color, ";01", 3);
+  }
+  if (colorinfo & GST_DEBUG_UNDERLINE) {
+    g_string_append_len (color, ";04", 3);
+  }
+  if (colorinfo & GST_DEBUG_FG_MASK) {
+    g_string_append_printf (color, ";3%1d", colorinfo & GST_DEBUG_FG_MASK);
+  }
+  if (colorinfo & GST_DEBUG_BG_MASK) {
+    g_string_append_printf (color, ";4%1d",
+        (colorinfo & GST_DEBUG_BG_MASK) >> 4);
+  }
+  g_string_append_c (color, 'm');
+
+  return g_string_free (color, FALSE);
+}
+
+/**
+ * gst_debug_log_default:
+ * @category: category to log
+ * @level: level of the message
+ * @file: the file that emitted the message, usually the __FILE__ identifier
+ * @function: the function that emitted the message
+ * @line: the line from that the message was emitted, usually __LINE__
+ * @message: the actual message
+ * @object: the object this message relates to or NULL if none
+ * @unused: an unused variable, reserved for some user_data.
+ *
+ * The default logging handler used by GStreamer. Logging functions get called
+ * whenever a macro like GST_DEBUG or similar is used. This function outputs the
+ * message and additional info using the glib error handler.
+ * You can add other handlers by using gst_debug_add_log_function().
+ * And you can remove this handler by calling
+ * gst_debug_remove_log_function(gst_debug_log_default);
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_log_default (GstDebugCategory * category, GstDebugLevel level,
+    const gchar * file, const gchar * function, gint line,
+    GObject * object, GstDebugMessage * message, gpointer unused)
+{
+  gchar *color = NULL;
+  gchar *clear;
+  gchar *obj = NULL;
+  gchar pidcolor[10];
+  const gchar *levelcolor;
+  gint pid;
+  GstClockTime elapsed;
+  gboolean free_color = TRUE;
+  gboolean free_obj = TRUE;
+  static const gchar *levelcolormap[] = {
+    "\033[37m",                 /* GST_LEVEL_NONE */
+    "\033[31;01m",              /* GST_LEVEL_ERROR */
+    "\033[33;01m",              /* GST_LEVEL_WARNING */
+    "\033[32;01m",              /* GST_LEVEL_INFO */
+    "\033[36m",                 /* GST_LEVEL_DEBUG */
+    "\033[37m"                  /* GST_LEVEL_LOG */
+  };
+
+  if (level > gst_debug_category_get_threshold (category))
+    return;
+
+  pid = getpid ();
+
+  /* color info */
+  if (gst_debug_is_colored ()) {
+    color = gst_debug_construct_term_color (gst_debug_category_get_color
+        (category));
+    clear = "\033[00m";
+    g_sprintf (pidcolor, "\033[3%1dm", pid % 6 + 31);
+    levelcolor = levelcolormap[level];
+  } else {
+    color = "\0";
+    free_color = FALSE;
+    clear = "";
+    pidcolor[0] = '\0';
+    levelcolor = "\0";
+  }
+
+  if (object) {
+    obj = gst_debug_print_object (object);
+  } else {
+    obj = "\0";
+    free_obj = FALSE;
+  }
+
+  elapsed = GST_CLOCK_DIFF (_priv_gst_info_start_time,
+      gst_util_get_timestamp ());
+
+  /*
+     g_printerr ("%s (%p - %" GST_TIME_FORMAT ") %s%20s%s(%s%5d%s) %s%s(%d):%s:%s%s %s\n",
+     gst_debug_level_get_name (level), g_thread_self (),
+     GST_TIME_ARGS (elapsed), color,
+     gst_debug_category_get_name (category), clear, pidcolor, pid, clear,
+     color, file, line, function, obj, clear, gst_debug_message_get (message));
+   */
+
+  g_printerr ("%" GST_TIME_FORMAT
+      " %s%5d%s %p %s%s%s %s%20s %s:%d:%s:%s%s %s\n", GST_TIME_ARGS (elapsed),
+      pidcolor, pid, clear, g_thread_self (), levelcolor,
+      gst_debug_level_get_name (level), clear, color,
+      gst_debug_category_get_name (category), file, line, function, obj, clear,
+      gst_debug_message_get (message));
+
+  if (free_color)
+    g_free (color);
+  if (free_obj)
+    g_free (obj);
+}
+
+/**
+ * gst_debug_level_get_name:
+ * @level: the level to get the name for
+ *
+ * Get the string representation of a debugging level
+ *
+ * Returns: the name
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+const gchar *
+gst_debug_level_get_name (GstDebugLevel level)
+{
+  switch (level) {
+    case GST_LEVEL_NONE:
+      return "";
+    case GST_LEVEL_ERROR:
+      return "ERROR";
+    case GST_LEVEL_WARNING:
+      return "WARN ";
+    case GST_LEVEL_INFO:
+      return "INFO ";
+    case GST_LEVEL_DEBUG:
+      return "DEBUG";
+    case GST_LEVEL_LOG:
+      return "LOG  ";
+    default:
+      g_warning ("invalid level specified for gst_debug_level_get_name");
+      return "";
+  }
+}
+
+/**
+ * gst_debug_add_log_function:
+ * @func: the function to use
+ * @data: user data
+ *
+ * Adds the logging function to the list of logging functions.
+ * Be sure to use G_GNUC_NO_INSTRUMENT on that function, it is needed.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_add_log_function (GstLogFunction func, gpointer data)
+{
+  LogFuncEntry *entry;
+  GSList *list;
+
+  g_return_if_fail (func != NULL);
+
+  entry = g_new (LogFuncEntry, 1);
+  entry->func = func;
+  entry->user_data = data;
+  /* FIXME: we leak the old list here - other threads might access it right now
+   * in gst_debug_logv. Another solution is to lock the mutex in gst_debug_logv,
+   * but that is waaay costly.
+   * It'd probably be clever to use some kind of RCU here, but I don't know
+   * anything about that.
+   */
+  g_static_mutex_lock (&__log_func_mutex);
+  list = g_slist_copy (__log_functions);
+  __log_functions = g_slist_prepend (list, entry);
+  g_static_mutex_unlock (&__log_func_mutex);
+
+  GST_DEBUG ("prepended log function %p (user data %p) to log functions",
+      func, data);
+}
+
+static gint
+gst_debug_compare_log_function_by_func (gconstpointer entry, gconstpointer func)
+{
+  gpointer entryfunc = (gpointer) (((LogFuncEntry *) entry)->func);
+
+  return (entryfunc < func) ? -1 : (entryfunc > func) ? 1 : 0;
+}
+
+static gint
+gst_debug_compare_log_function_by_data (gconstpointer entry, gconstpointer data)
+{
+  gpointer entrydata = ((LogFuncEntry *) entry)->user_data;
+
+  return (entrydata < data) ? -1 : (entrydata > data) ? 1 : 0;
+}
+
+static guint
+gst_debug_remove_with_compare_func (GCompareFunc func, gpointer data)
+{
+  GSList *found;
+  GSList *new;
+  guint removals = 0;
+
+  g_static_mutex_lock (&__log_func_mutex);
+  new = __log_functions;
+  while ((found = g_slist_find_custom (new, data, func))) {
+    if (new == __log_functions) {
+      new = g_slist_copy (new);
+      continue;
+    }
+    g_free (found->data);
+    new = g_slist_delete_link (new, found);
+    removals++;
+  }
+  /* FIXME: We leak the old list here. See _add_log_function for why. */
+  __log_functions = new;
+  g_static_mutex_unlock (&__log_func_mutex);
+
+  return removals;
+}
+
+/**
+ * gst_debug_remove_log_function:
+ * @func: the log function to remove
+ *
+ * Removes all registered instances of the given logging functions.
+ *
+ * Returns: How many instances of the function were removed
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+guint
+gst_debug_remove_log_function (GstLogFunction func)
+{
+  guint removals;
+
+  g_return_val_if_fail (func != NULL, 0);
+
+  removals =
+      gst_debug_remove_with_compare_func
+      (gst_debug_compare_log_function_by_func, (gpointer) func);
+  GST_DEBUG ("removed log function %p %d times from log function list", func,
+      removals);
+
+  return removals;
+}
+
+/**
+ * gst_debug_remove_log_function_by_data:
+ * @data: user data of the log function to remove
+ *
+ * Removes all registered instances of log functions with the given user data.
+ *
+ * Returns: How many instances of the function were removed
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+guint
+gst_debug_remove_log_function_by_data (gpointer data)
+{
+  guint removals;
+
+  removals =
+      gst_debug_remove_with_compare_func
+      (gst_debug_compare_log_function_by_data, data);
+  GST_DEBUG
+      ("removed %d log functions with user data %p from log function list",
+      removals, data);
+
+  return removals;
+}
+
+/**
+ * gst_debug_set_colored:
+ * @colored: Whether to use colored output or not
+ *
+ * Sets or unsets the use of coloured debugging output.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_set_colored (gboolean colored)
+{
+  gst_atomic_int_set (&__use_color, colored ? 1 : 0);
+}
+
+/**
+ * gst_debug_is_colored:
+ *
+ * Checks if the debugging output should be colored.
+ *
+ * Returns: TRUE, if the debug output should be colored.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+gboolean
+gst_debug_is_colored (void)
+{
+  return g_atomic_int_get (&__use_color) == 0 ? FALSE : TRUE;
+}
+
+/**
+ * gst_debug_set_active:
+ * @active: Whether to use debugging output or not
+ *
+ * If activated, debugging messages are sent to the debugging
+ * handlers.
+ * It makes sense to deactivate it for speed issues.
+ * <note><para>This function is not threadsafe. It makes sense to only call it
+ * during initialization.</para></note>
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_set_active (gboolean active)
+{
+  __gst_debug_enabled = active;
+  if (active)
+    __gst_debug_min = GST_LEVEL_COUNT;
+  else
+    __gst_debug_min = GST_LEVEL_NONE;
+}
+
+/**
+ * gst_debug_is_active:
+ *
+ * Checks if debugging output is activated.
+ *
+ * Returns: TRUE, if debugging is activated
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+gboolean
+gst_debug_is_active (void)
+{
+  return __gst_debug_enabled;
+}
+
+/**
+ * gst_debug_set_default_threshold:
+ * @level: level to set
+ *
+ * Sets the default threshold to the given level and updates all categories to
+ * use this threshold.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_set_default_threshold (GstDebugLevel level)
+{
+  gst_atomic_int_set (&__default_level, level);
+  gst_debug_reset_all_thresholds ();
+}
+
+/**
+ * gst_debug_get_default_threshold:
+ *
+ * Returns the default threshold that is used for new categories.
+ *
+ * Returns: the default threshold level
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GstDebugLevel
+gst_debug_get_default_threshold (void)
+{
+  return (GstDebugLevel) g_atomic_int_get (&__default_level);
+}
+static void
+gst_debug_reset_threshold (gpointer category, gpointer unused)
+{
+  GstDebugCategory *cat = (GstDebugCategory *) category;
+  GSList *walk;
+
+  g_static_mutex_lock (&__level_name_mutex);
+  walk = __level_name;
+  while (walk) {
+    LevelNameEntry *entry = walk->data;
+
+    walk = g_slist_next (walk);
+    if (g_pattern_match_string (entry->pat, cat->name)) {
+      GST_LOG ("category %s matches pattern %p - gets set to level %d",
+          cat->name, entry->pat, entry->level);
+      gst_debug_category_set_threshold (cat, entry->level);
+      goto exit;
+    }
+  }
+  gst_debug_category_set_threshold (cat, gst_debug_get_default_threshold ());
+
+exit:
+  g_static_mutex_unlock (&__level_name_mutex);
+}
+static void
+gst_debug_reset_all_thresholds (void)
+{
+  g_static_mutex_lock (&__cat_mutex);
+  g_slist_foreach (__categories, gst_debug_reset_threshold, NULL);
+  g_static_mutex_unlock (&__cat_mutex);
+}
+static void
+for_each_threshold_by_entry (gpointer data, gpointer user_data)
+{
+  GstDebugCategory *cat = (GstDebugCategory *) data;
+  LevelNameEntry *entry = (LevelNameEntry *) user_data;
+
+  if (g_pattern_match_string (entry->pat, cat->name)) {
+    GST_LOG ("category %s matches pattern %p - gets set to level %d",
+        cat->name, entry->pat, entry->level);
+    gst_debug_category_set_threshold (cat, entry->level);
+  }
+}
+
+/**
+ * gst_debug_set_threshold_for_name:
+ * @name: name of the categories to set
+ * @level: level to set them to
+ *
+ * Sets all categories which match the given glob style pattern to the given
+ * level.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_set_threshold_for_name (const gchar * name, GstDebugLevel level)
+{
+  GPatternSpec *pat;
+  LevelNameEntry *entry;
+
+  g_return_if_fail (name != NULL);
+
+  pat = g_pattern_spec_new (name);
+  entry = g_new (LevelNameEntry, 1);
+  entry->pat = pat;
+  entry->level = level;
+  g_static_mutex_lock (&__level_name_mutex);
+  __level_name = g_slist_prepend (__level_name, entry);
+  g_static_mutex_unlock (&__level_name_mutex);
+  g_static_mutex_lock (&__cat_mutex);
+  g_slist_foreach (__categories, for_each_threshold_by_entry, entry);
+  g_static_mutex_unlock (&__cat_mutex);
+}
+
+/**
+ * gst_debug_unset_threshold_for_name:
+ * @name: name of the categories to set
+ *
+ * Resets all categories with the given name back to the default level.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_unset_threshold_for_name (const gchar * name)
+{
+  GSList *walk;
+  GPatternSpec *pat;
+
+  g_return_if_fail (name != NULL);
+
+  pat = g_pattern_spec_new (name);
+  g_static_mutex_lock (&__level_name_mutex);
+  walk = __level_name;
+  /* improve this if you want, it's mighty slow */
+  while (walk) {
+    LevelNameEntry *entry = walk->data;
+
+    if (g_pattern_spec_equal (entry->pat, pat)) {
+      __level_name = g_slist_remove_link (__level_name, walk);
+      g_pattern_spec_free (entry->pat);
+      g_free (entry);
+      g_slist_free_1 (walk);
+      walk = __level_name;
+    }
+  }
+  g_static_mutex_unlock (&__level_name_mutex);
+  g_pattern_spec_free (pat);
+  gst_debug_reset_all_thresholds ();
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+GstDebugCategory *
+_gst_debug_category_new (const gchar * name, guint color,
+    const gchar * description)
+{
+  GstDebugCategory *cat;
+
+  g_return_val_if_fail (name != NULL, NULL);
+
+  cat = g_new (GstDebugCategory, 1);
+  cat->name = g_strdup (name);
+  cat->color = color;
+  if (description != NULL) {
+    cat->description = g_strdup (description);
+  } else {
+    cat->description = g_strdup ("no description");
+  }
+  gst_atomic_int_set (&cat->threshold, 0);
+  gst_debug_reset_threshold (cat, NULL);
+
+  /* add to category list */
+  g_static_mutex_lock (&__cat_mutex);
+  __categories = g_slist_prepend (__categories, cat);
+  g_static_mutex_unlock (&__cat_mutex);
+
+  return cat;
+}
+
+/**
+ * gst_debug_category_free:
+ * @category: #GstDebugCategory to free.
+ *
+ * Removes and frees the category and all associated resources.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_category_free (GstDebugCategory * category)
+{
+  if (category == NULL)
+    return;
+
+  /* remove from category list */
+  g_static_mutex_lock (&__cat_mutex);
+  __categories = g_slist_remove (__categories, category);
+  g_static_mutex_unlock (&__cat_mutex);
+
+  g_free ((gpointer) category->name);
+  g_free ((gpointer) category->description);
+  g_free (category);
+}
+
+/**
+ * gst_debug_category_set_threshold:
+ * @category: a #GstDebugCategory to set threshold of.
+ * @level: the #GstDebugLevel threshold to set.
+ *
+ * Sets the threshold of the category to the given level. Debug information will
+ * only be output if the threshold is lower or equal to the level of the
+ * debugging message.
+ * <note><para>
+ * Do not use this function in production code, because other functions may
+ * change the threshold of categories as side effect. It is however a nice
+ * function to use when debugging (even from gdb).
+ * </para></note>
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_category_set_threshold (GstDebugCategory * category,
+    GstDebugLevel level)
+{
+  g_return_if_fail (category != NULL);
+
+  if (level > __gst_debug_min) {
+    __gst_debug_enabled = TRUE;
+    __gst_debug_min = level;
+  }
+
+  gst_atomic_int_set (&category->threshold, level);
+}
+
+/**
+ * gst_debug_category_reset_threshold:
+ * @category: a #GstDebugCategory to reset threshold of.
+ *
+ * Resets the threshold of the category to the default level. Debug information
+ * will only be output if the threshold is lower or equal to the level of the
+ * debugging message.
+ * Use this function to set the threshold back to where it was after using
+ * gst_debug_category_set_threshold().
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_category_reset_threshold (GstDebugCategory * category)
+{
+  gst_debug_reset_threshold (category, NULL);
+}
+
+/**
+ * gst_debug_category_get_threshold:
+ * @category: a #GstDebugCategory to get threshold of.
+ *
+ * Returns the threshold of a #GstDebugCategory.
+ *
+ * Returns: the #GstDebugLevel that is used as threshold.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GstDebugLevel
+gst_debug_category_get_threshold (GstDebugCategory * category)
+{
+  return g_atomic_int_get (&category->threshold);
+}
+
+/**
+ * gst_debug_category_get_name:
+ * @category: a #GstDebugCategory to get name of.
+ *
+ * Returns the name of a debug category.
+ *
+ * Returns: the name of the category.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+const gchar *
+gst_debug_category_get_name (GstDebugCategory * category)
+{
+  return category->name;
+}
+
+/**
+ * gst_debug_category_get_color:
+ * @category: a #GstDebugCategory to get the color of.
+ *
+ * Returns the color of a debug category used when printing output in this
+ * category.
+ *
+ * Returns: the color of the category.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+guint
+gst_debug_category_get_color (GstDebugCategory * category)
+{
+  return category->color;
+}
+
+/**
+ * gst_debug_category_get_description:
+ * @category: a #GstDebugCategory to get the description of.
+ *
+ * Returns the description of a debug category.
+ *
+ * Returns: the description of the category.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+const gchar *
+gst_debug_category_get_description (GstDebugCategory * category)
+{
+  return category->description;
+}
+
+/**
+ * gst_debug_get_all_categories:
+ *
+ * Returns a snapshot of a all categories that are currently in use . This list
+ * may change anytime.
+ * The caller has to free the list after use.
+ *
+ * Returns: the list of categories
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GSList *
+gst_debug_get_all_categories (void)
+{
+  GSList *ret;
+
+  g_static_mutex_lock (&__cat_mutex);
+  ret = g_slist_copy (__categories);
+  g_static_mutex_unlock (&__cat_mutex);
+
+  return ret;
+}
+
+/*** FUNCTION POINTERS ********************************************************/
+
+static GHashTable *__gst_function_pointers;     /* NULL */
+static GStaticMutex __dbg_functions_mutex = G_STATIC_MUTEX_INIT;
+
+const gchar *
+_gst_debug_nameof_funcptr (GstDebugFuncPtr ptr)
+    G_GNUC_NO_INSTRUMENT;
+
+/* This function MUST NOT return NULL */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+     const gchar *_gst_debug_nameof_funcptr (GstDebugFuncPtr func)
+{
+  gchar *ptrname;
+
+#ifdef HAVE_DLADDR
+  Dl_info dl_info;
+#endif
+
+  if (G_UNLIKELY (func == NULL))
+    return "(NULL)";
+
+  g_static_mutex_lock (&__dbg_functions_mutex);
+  if (G_LIKELY (__gst_function_pointers)) {
+    ptrname = g_hash_table_lookup (__gst_function_pointers, (gpointer) func);
+    g_static_mutex_unlock (&__dbg_functions_mutex);
+    if (G_LIKELY (ptrname))
+      return ptrname;
+  } else {
+    g_static_mutex_unlock (&__dbg_functions_mutex);
+  }
+  /* we need to create an entry in the hash table for this one so we don't leak
+   * the name */
+#ifdef HAVE_DLADDR
+  if (dladdr ((gpointer) func, &dl_info) && dl_info.dli_sname) {
+    gchar *name = g_strdup (dl_info.dli_sname);
+
+    _gst_debug_register_funcptr (func, name);
+    return name;
+  } else
+#endif
+  {
+    gchar *name = g_strdup_printf ("%p", (gpointer) func);
+
+    _gst_debug_register_funcptr (func, name);
+    return name;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+_gst_debug_register_funcptr (GstDebugFuncPtr func, const gchar * ptrname)
+{
+  gpointer ptr = (gpointer) func;
+
+  g_static_mutex_lock (&__dbg_functions_mutex);
+
+  if (!__gst_function_pointers)
+    __gst_function_pointers = g_hash_table_new (g_direct_hash, g_direct_equal);
+  if (!g_hash_table_lookup (__gst_function_pointers, ptr))
+    g_hash_table_insert (__gst_function_pointers, ptr, (gpointer) ptrname);
+
+  g_static_mutex_unlock (&__dbg_functions_mutex);
+}
+
+/*** PRINTF EXTENSIONS ********************************************************/
+
+#ifdef HAVE_PRINTF_EXTENSION
+static int
+_gst_info_printf_extension_ptr (FILE * stream, const struct printf_info *info,
+    const void *const *args)
+{
+  char *buffer;
+  int len;
+  void *ptr;
+
+  buffer = NULL;
+  ptr = *(void **) args[0];
+
+  buffer = gst_debug_print_object (ptr);
+  len = fprintf (stream, "%*s", (info->left ? -info->width : info->width),
+      buffer);
+
+  g_free (buffer);
+  return len;
+}
+
+static int
+_gst_info_printf_extension_segment (FILE * stream,
+    const struct printf_info *info, const void *const *args)
+{
+  char *buffer;
+  int len;
+  void *ptr;
+
+  buffer = NULL;
+  ptr = *(void **) args[0];
+
+  buffer = gst_debug_print_segment (ptr);
+  len = fprintf (stream, "%*s", (info->left ? -info->width : info->width),
+      buffer);
+
+  g_free (buffer);
+  return len;
+}
+
+static int
+_gst_info_printf_extension_arginfo (const struct printf_info *info, size_t n,
+    int *argtypes)
+{
+  if (n > 0)
+    argtypes[0] = PA_POINTER;
+  return 1;
+}
+#endif /* HAVE_PRINTF_EXTENSION */
+
+#else /* !GST_DISABLE_GST_DEBUG */
+guint
+gst_debug_remove_log_function (GstLogFunction func)
+{
+  return 0;
+}
+
+guint
+gst_debug_remove_log_function_by_data (gpointer data)
+{
+  return 0;
+}
+
+gboolean
+_priv_gst_in_valgrind (void)
+{
+  return FALSE;
+}
+
+#endif /* GST_DISABLE_GST_DEBUG */
+
+
+#ifdef GST_ENABLE_FUNC_INSTRUMENTATION
+/* FIXME make this thread specific */
+static GSList *stack_trace = NULL;
+
+void
+__cyg_profile_func_enter (void *this_fn, void *call_site)
+    G_GNUC_NO_INSTRUMENT;
+     void __cyg_profile_func_enter (void *this_fn, void *call_site)
+{
+  gchar *name = _gst_debug_nameof_funcptr (this_fn);
+  gchar *site = _gst_debug_nameof_funcptr (call_site);
+
+  GST_CAT_DEBUG (GST_CAT_CALL_TRACE, "entering function %s from %s", name,
+      site);
+  stack_trace =
+      g_slist_prepend (stack_trace, g_strdup_printf ("%8p in %s from %p (%s)",
+          this_fn, name, call_site, site));
+
+  g_free (name);
+  g_free (site);
+}
+
+void
+__cyg_profile_func_exit (void *this_fn, void *call_site)
+    G_GNUC_NO_INSTRUMENT;
+     void __cyg_profile_func_exit (void *this_fn, void *call_site)
+{
+  gchar *name = _gst_debug_nameof_funcptr (this_fn);
+
+  GST_CAT_DEBUG (GST_CAT_CALL_TRACE, "leaving function %s", name);
+  g_free (stack_trace->data);
+  stack_trace = g_slist_delete_link (stack_trace, stack_trace);
+
+  g_free (name);
+}
+
+/**
+ * gst_debug_print_stack_trace:
+ *
+ * If GST_ENABLE_FUNC_INSTRUMENTATION is defined a stacktrace is available for
+ * gstreamer code, which can be printed with this function.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_debug_print_stack_trace (void)
+{
+  GSList *walk = stack_trace;
+  gint count = 0;
+
+  if (walk)
+    walk = g_slist_next (walk);
+
+  while (walk) {
+    gchar *name = (gchar *) walk->data;
+
+    g_print ("#%-2d %s\n", count++, name);
+
+    walk = g_slist_next (walk);
+  }
+}
+#else
+void
+gst_debug_print_stack_trace (void)
+{
+  /* nothing because it's compiled out */
+}
+
+#endif /* GST_ENABLE_FUNC_INSTRUMENTATION */
+
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+GstDebugCategory ** _GST_CAT_DEFAULT()
+{
+	return &GST_CAT_DEFAULT;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+gboolean*	gst_debug_enabled()
+{
+	return &__gst_debug_enabled;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GstDebugCategory** _GST_CAT_QOS()
+{
+	return &GST_CAT_QOS;
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+
+GstDebugCategory ** _GST_CAT_EVENT()
+{
+	return &GST_CAT_EVENT;
+}
+
+
+//#endif