/* GStreamer

 * Copyright (C) 2001 RidgeRun (http://www.ridgerun.com/)

 * Written by Erik Walthinsen <omega@ridgerun.com>

 *

 * gstindex.c: Index for mappings and other data

 *

 * 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., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

/**

 * SECTION:gstindex

 * @title: GstIndexEntry

 * @short_description: Generate indexes on objects

 * @see_also: #GstIndexFactory

 *

 * #GstIndex is used to generate a stream index of one or more elements

 * in a pipeline.

 *

 * Elements will overload the set_index and get_index virtual methods in

 * #GstElement. When streaming data, the element will add index entries if it

 * has an index set.

 *

 * Each element that adds to the index will do that using a writer_id. The

 * writer_id is obtained from gst_index_get_writer_id().

 *

 * The application that wants to index the stream will create a new index object

 * using gst_index_new() or gst_index_factory_make(). The index is assigned to a

 * specific element, a bin or the whole pipeline. This will cause indexable

 * elements to add entires to the index while playing.

 */

/* FIXME: complete gobject annotations */

/* FIXME-0.11: cleanup API

 * - no one seems to use GstIndexGroup, GstIndexCertainty

 *

 * - the API for application to use the index is mostly missing

 *   - apps need to get a list of writers

 *   - apps need to be able to iterate over each writers index entry collection

 * - gst_index_get_assoc_entry() should pass ownership

 *   - the GstIndexEntry structure is large and contains repetitive information

 *   - we want to allow Indexers to implement a saner storage and create

 *     GstIndexEntries on demand (the app has to free them), might even make

 *     sense to ask the app to provide a ptr and fill it.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <gst/gst.h>

/* Index signals and args */

enum

{

  ENTRY_ADDED,

  LAST_SIGNAL

};

enum

{

  ARG_0,

  ARG_RESOLVER

      /* FILL ME */

};

#if 0

GST_DEBUG_CATEGORY_STATIC (index_debug);

#define GST_CAT_DEFAULT index_debug

#endif

static void gst_index_finalize (GObject * object);

static void gst_index_set_property (GObject * object, guint prop_id,

    const GValue * value, GParamSpec * pspec);

static void gst_index_get_property (GObject * object, guint prop_id,

    GValue * value, GParamSpec * pspec);

static GstIndexGroup *gst_index_group_new (guint groupnum);

static void gst_index_group_free (GstIndexGroup * group);

static gboolean gst_index_path_resolver (GstIndex * index, GstObject * writer,

    gchar ** writer_string, gpointer data);

static gboolean gst_index_gtype_resolver (GstIndex * index, GstObject * writer,

    gchar ** writer_string, gpointer data);

static void gst_index_add_entry (GstIndex * index, GstIndexEntry * entry);

static guint gst_index_signals[LAST_SIGNAL] = { 0 };

typedef struct

{

  GstIndexResolverMethod method;

  GstIndexResolver resolver;

  gpointer user_data;

}

ResolverEntry;

static const ResolverEntry resolvers[] = {

  {GST_INDEX_RESOLVER_CUSTOM, NULL, NULL},

  {GST_INDEX_RESOLVER_GTYPE, gst_index_gtype_resolver, NULL},

  {GST_INDEX_RESOLVER_PATH, gst_index_path_resolver, NULL},

};

#define GST_TYPE_INDEX_RESOLVER (gst_index_resolver_get_type())

static GType

gst_index_resolver_get_type (void)

{

  static GType index_resolver_type = 0;

  static const GEnumValue index_resolver[] = {

    {GST_INDEX_RESOLVER_CUSTOM, "GST_INDEX_RESOLVER_CUSTOM", "custom"},

    {GST_INDEX_RESOLVER_GTYPE, "GST_INDEX_RESOLVER_GTYPE", "gtype"},

    {GST_INDEX_RESOLVER_PATH, "GST_INDEX_RESOLVER_PATH", "path"},

    {0, NULL, NULL},

  };

  if (!index_resolver_type) {

    index_resolver_type =

        g_enum_register_static ("GstIndexResolver", index_resolver);

  }

  return index_resolver_type;

}

G_DEFINE_BOXED_TYPE (GstIndexEntry, gst_index_entry,

    (GBoxedCopyFunc) gst_index_entry_copy,

    (GBoxedFreeFunc) gst_index_entry_free);

#if 0

#define _do_init \

{ \

  GST_DEBUG_CATEGORY_INIT (index_debug, "GST_INDEX", GST_DEBUG_BOLD, \

      "Generic indexing support"); \

}

#endif

G_DEFINE_TYPE (GstIndex, gst_index, GST_TYPE_OBJECT);

static void

gst_index_class_init (GstIndexClass * klass)

{

  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

  /**

   * GstIndex::entry-added

   * @gstindex: the object which received the signal.

   * @arg1: The entry added to the index.

   *

   * Is emitted when a new entry is added to the index.

   */

  gst_index_signals[ENTRY_ADDED] =

      g_signal_new ("entry-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,

      G_STRUCT_OFFSET (GstIndexClass, entry_added), NULL, NULL,

      g_cclosure_marshal_generic, G_TYPE_NONE, 1, GST_TYPE_INDEX_ENTRY);

  gobject_class->set_property = gst_index_set_property;

  gobject_class->get_property = gst_index_get_property;

  gobject_class->finalize = gst_index_finalize;

  g_object_class_install_property (gobject_class, ARG_RESOLVER,

      g_param_spec_enum ("resolver", "Resolver",

          "Select a predefined object to string mapper",

          GST_TYPE_INDEX_RESOLVER, GST_INDEX_RESOLVER_PATH,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

}

static void

gst_index_init (GstIndex * index)

{

  index->curgroup = gst_index_group_new (0);

  index->maxgroup = 0;

  index->groups = g_list_prepend (NULL, index->curgroup);

  index->writers = g_hash_table_new (NULL, NULL);

  index->last_id = 0;

  index->method = GST_INDEX_RESOLVER_PATH;

  index->resolver = resolvers[index->method].resolver;

  index->resolver_user_data = resolvers[index->method].user_data;

  GST_OBJECT_FLAG_SET (index, GST_INDEX_WRITABLE);

  GST_OBJECT_FLAG_SET (index, GST_INDEX_READABLE);

  GST_DEBUG ("created new index");

}

static void

gst_index_free_writer (gpointer key, gpointer value, gpointer user_data)

{

  GstIndexEntry *entry = (GstIndexEntry *) value;

  if (entry) {

    gst_index_entry_free (entry);

  }

}

static void

gst_index_finalize (GObject * object)

{

  GstIndex *index = GST_INDEX (object);

  if (index->groups) {

    g_list_foreach (index->groups, (GFunc) gst_index_group_free, NULL);

    g_list_free (index->groups);

    index->groups = NULL;

  }

  if (index->writers) {

    g_hash_table_foreach (index->writers, gst_index_free_writer, NULL);

    g_hash_table_destroy (index->writers);

    index->writers = NULL;

  }

  if (index->filter_user_data && index->filter_user_data_destroy)

    index->filter_user_data_destroy (index->filter_user_data);

  if (index->resolver_user_data && index->resolver_user_data_destroy)

    index->resolver_user_data_destroy (index->resolver_user_data);

  G_OBJECT_CLASS (gst_index_parent_class)->finalize (object);

}

static void

gst_index_set_property (GObject * object, guint prop_id,

    const GValue * value, GParamSpec * pspec)

{

  GstIndex *index;

  index = GST_INDEX (object);

  switch (prop_id) {

    case ARG_RESOLVER:

      index->method = (GstIndexResolverMethod) g_value_get_enum (value);

      index->resolver = resolvers[index->method].resolver;

      index->resolver_user_data = resolvers[index->method].user_data;

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

      break;

  }

}

static void

gst_index_get_property (GObject * object, guint prop_id,

    GValue * value, GParamSpec * pspec)

{

  GstIndex *index;

  index = GST_INDEX (object);

  switch (prop_id) {

    case ARG_RESOLVER:

      g_value_set_enum (value, index->method);

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

      break;

  }

}

static GstIndexGroup *

gst_index_group_new (guint groupnum)

{

  GstIndexGroup *indexgroup = g_slice_new (GstIndexGroup);

  indexgroup->groupnum = groupnum;

  indexgroup->entries = NULL;

  indexgroup->certainty = GST_INDEX_UNKNOWN;

  indexgroup->peergroup = -1;

  GST_DEBUG ("created new index group %d", groupnum);

  return indexgroup;

}

static void

gst_index_group_free (GstIndexGroup * group)

{

  g_slice_free (GstIndexGroup, group);

}

/* do not resurrect this, add a derived dummy index class instead */

#if 0

/**

 * gst_index_new:

 *

 * Create a new dummy index object. Use gst_element_set_index() to assign that

 * to an element or pipeline. This index is not storing anything, but will

 * still emit e.g. the #GstIndex::entry-added signal.

 *

 * Returns: (transfer full): a new index object

 */

GstIndex *

gst_index_new (void)

{

  GstIndex *index;

  index = g_object_new (gst_index_get_type (), NULL);

  return index;

}

/**

 * gst_index_commit:

 * @index: the index to commit

 * @id: the writer that commited the index

 *

 * Tell the index that the writer with the given id is done

 * with this index and is not going to write any more entries

 * to it.

 */

void

gst_index_commit (GstIndex * index, gint id)

{

  GstIndexClass *iclass;

  iclass = GST_INDEX_GET_CLASS (index);

  if (iclass->commit)

    iclass->commit (index, id);

}

/**

 * gst_index_get_group:

 * @index: the index to get the current group from

 *

 * Get the id of the current group.

 *

 * Returns: the id of the current group.

 */

gint

gst_index_get_group (GstIndex * index)

{

  return index->curgroup->groupnum;

}

/**

 * gst_index_new_group:

 * @index: the index to create the new group in

 *

 * Create a new group for the given index. It will be

 * set as the current group.

 *

 * Returns: the id of the newly created group.

 */

gint

gst_index_new_group (GstIndex * index)

{

  index->curgroup = gst_index_group_new (++index->maxgroup);

  index->groups = g_list_append (index->groups, index->curgroup);

  GST_DEBUG ("created new group %d in index", index->maxgroup);

  return index->maxgroup;

}

/**

 * gst_index_set_group:

 * @index: the index to set the new group in

 * @groupnum: the groupnumber to set

 *

 * Set the current groupnumber to the given argument.

 *

 * Returns: %TRUE if the operation succeeded, %FALSE if the group

 * did not exist.

 */

gboolean

gst_index_set_group (GstIndex * index, gint groupnum)

{

  GList *list;

  GstIndexGroup *indexgroup;

  /* first check for null change */

  if (groupnum == index->curgroup->groupnum)

    return TRUE;

  /* else search for the proper group */

  list = index->groups;

  while (list) {

    indexgroup = (GstIndexGroup *) (list->data);

    list = g_list_next (list);

    if (indexgroup->groupnum == groupnum) {

      index->curgroup = indexgroup;

      GST_DEBUG ("switched to index group %d", indexgroup->groupnum);

      return TRUE;

    }

  }

  /* couldn't find the group in question */

  GST_DEBUG ("couldn't find index group %d", groupnum);

  return FALSE;

}

#endif

#if 0

/**

 * gst_index_set_certainty:

 * @index: the index to set the certainty on

 * @certainty: the certainty to set

 *

 * Set the certainty of the given index.

 */

void

gst_index_set_certainty (GstIndex * index, GstIndexCertainty certainty)

{

  index->curgroup->certainty = certainty;

}

/**

 * gst_index_get_certainty:

 * @index: the index to get the certainty of

 *

 * Get the certainty of the given index.

 *

 * Returns: the certainty of the index.

 */

GstIndexCertainty

gst_index_get_certainty (GstIndex * index)

{

  return index->curgroup->certainty;

}

#endif

#if 0

/**

 * gst_index_set_filter:

 * @index: the index to register the filter on

 * @filter: the filter to register

 * @user_data: data passed to the filter function

 *

 * Lets the app register a custom filter function so that

 * it can select what entries should be stored in the index.

 */

void

gst_index_set_filter (GstIndex * index,

    GstIndexFilter filter, gpointer user_data)

{

  g_return_if_fail (GST_IS_INDEX (index));

  gst_index_set_filter_full (index, filter, user_data, NULL);

}

/**

 * gst_index_set_filter_full:

 * @index: the index to register the filter on

 * @filter: the filter to register

 * @user_data: data passed to the filter function

 * @user_data_destroy: function to call when @user_data is unset

 *

 * Lets the app register a custom filter function so that

 * it can select what entries should be stored in the index.

 */

void

gst_index_set_filter_full (GstIndex * index,

    GstIndexFilter filter, gpointer user_data, GDestroyNotify user_data_destroy)

{

  g_return_if_fail (GST_IS_INDEX (index));

  if (index->filter_user_data && index->filter_user_data_destroy)

    index->filter_user_data_destroy (index->filter_user_data);

  index->filter = filter;

  index->filter_user_data = user_data;

  index->filter_user_data_destroy = user_data_destroy;

}

/**

 * gst_index_set_resolver:

 * @index: the index to register the resolver on

 * @resolver: the resolver to register

 * @user_data: data passed to the resolver function

 *

 * Lets the app register a custom function to map index

 * ids to writer descriptions.

 */

void

gst_index_set_resolver (GstIndex * index,

    GstIndexResolver resolver, gpointer user_data)

{

  gst_index_set_resolver_full (index, resolver, user_data, NULL);

}

/**

 * gst_index_set_resolver_full:

 * @index: the index to register the resolver on

 * @resolver: the resolver to register

 * @user_data: data passed to the resolver function

 * @user_data_destroy: destroy function for @user_data

 *

 * Lets the app register a custom function to map index

 * ids to writer descriptions.

 */

void

gst_index_set_resolver_full (GstIndex * index, GstIndexResolver resolver,

    gpointer user_data, GDestroyNotify user_data_destroy)

{

  g_return_if_fail (GST_IS_INDEX (index));

  if (index->resolver_user_data && index->resolver_user_data_destroy)

    index->resolver_user_data_destroy (index->resolver_user_data);

  index->resolver = resolver;

  index->resolver_user_data = user_data;

  index->resolver_user_data_destroy = user_data_destroy;

  index->method = GST_INDEX_RESOLVER_CUSTOM;

}

#endif

/**

 * gst_index_entry_copy:

 * @entry: the entry to copy

 *

 * Copies an entry and returns the result.

 *

 * Free-function: gst_index_entry_free

 *

 * Returns: (transfer full): a newly allocated #GstIndexEntry.

 */

GstIndexEntry *

gst_index_entry_copy (GstIndexEntry * entry)

{

  GstIndexEntry *new_entry = g_slice_new (GstIndexEntry);

  memcpy (new_entry, entry, sizeof (GstIndexEntry));

  return new_entry;

}

/**

 * gst_index_entry_free:

 * @entry: (transfer full): the entry to free

 *

 * Free the memory used by the given entry.

 */

void

gst_index_entry_free (GstIndexEntry * entry)

{

  switch (entry->type) {

    case GST_INDEX_ENTRY_ID:

      if (entry->data.id.description) {

        g_free (entry->data.id.description);

        entry->data.id.description = NULL;

      }

      break;

    case GST_INDEX_ENTRY_ASSOCIATION:

      if (entry->data.assoc.assocs) {

        g_free (entry->data.assoc.assocs);

        entry->data.assoc.assocs = NULL;

      }

      break;

    case GST_INDEX_ENTRY_OBJECT:

      break;

    case GST_INDEX_ENTRY_FORMAT:

      break;

  }

  g_slice_free (GstIndexEntry, entry);

}

#if 0

/**

 * gst_index_add_format:

 * @index: the index to add the entry to

 * @id: the id of the index writer

 * @format: the format to add to the index

 *

 * Adds a format entry into the index. This function is

 * used to map dynamic #GstFormat ids to their original

 * format key.

 *

 * Free-function: gst_index_entry_free

 *

 * Returns: (transfer full): a pointer to the newly added entry in the index.

 */

GstIndexEntry *

gst_index_add_format (GstIndex * index, gint id, GstFormat format)

{

  GstIndexEntry *entry;

  const GstFormatDefinition *def;

  g_return_val_if_fail (GST_IS_INDEX (index), NULL);

  g_return_val_if_fail (format != 0, NULL);

  if (!GST_INDEX_IS_WRITABLE (index) || id == -1)

    return NULL;

  entry = g_slice_new (GstIndexEntry);

  entry->type = GST_INDEX_ENTRY_FORMAT;

  entry->id = id;

  entry->data.format.format = format;

  def = gst_format_get_details (format);

  entry->data.format.key = def->nick;

  gst_index_add_entry (index, entry);

  return entry;

}

#endif

/**

 * gst_index_add_id:

 * @index: the index to add the entry to

 * @id: the id of the index writer

 * @description: the description of the index writer

 *

 * Add an id entry into the index.

 *

 * Returns: a pointer to the newly added entry in the index.

 */

GstIndexEntry *

gst_index_add_id (GstIndex * index, gint id, gchar * description)

{

  GstIndexEntry *entry;

  g_return_val_if_fail (GST_IS_INDEX (index), NULL);

  g_return_val_if_fail (description != NULL, NULL);

  if (!GST_INDEX_IS_WRITABLE (index) || id == -1)

    return NULL;

  entry = g_slice_new (GstIndexEntry);

  entry->type = GST_INDEX_ENTRY_ID;

  entry->id = id;

  entry->data.id.description = description;

  gst_index_add_entry (index, entry);

  return entry;

}

static gboolean

gst_index_path_resolver (GstIndex * index, GstObject * writer,

    gchar ** writer_string, gpointer data)

{

  *writer_string = gst_object_get_path_string (writer);

  return TRUE;

}

static gboolean

gst_index_gtype_resolver (GstIndex * index, GstObject * writer,

    gchar ** writer_string, gpointer data)

{

  g_return_val_if_fail (writer != NULL, FALSE);

  if (GST_IS_PAD (writer)) {

    GstObject *element = gst_object_get_parent (GST_OBJECT (writer));

    gchar *name;

    name = gst_object_get_name (writer);

    if (element) {

      *writer_string = g_strdup_printf ("%s.%s",

          G_OBJECT_TYPE_NAME (element), name);

      gst_object_unref (element);

    } else {

      *writer_string = name;

      name = NULL;

    }

    g_free (name);

  } else {

    *writer_string = g_strdup (G_OBJECT_TYPE_NAME (writer));

  }

  return TRUE;

}

/**

 * gst_index_get_writer_id:

 * @index: the index to get a unique write id for

 * @writer: the #GstObject to allocate an id for

 * @id: a pointer to a gint to hold the id

 *

 * Before entries can be added to the index, a writer

 * should obtain a unique id. The methods to add new entries

 * to the index require this id as an argument.

 *

 * The application can implement a custom function to map the writer object

 * to a string. That string will be used to register or look up an id

 * in the index.

 *

 * > The caller must not hold @writer's GST_OBJECT_LOCK(), as the default

 * > resolver may call functions that take the object lock as well, and

 * > the lock is not recursive.

 *

 * Returns: %TRUE if the writer would be mapped to an id.

 */

gboolean

gst_index_get_writer_id (GstIndex * index, GstObject * writer, gint * id)

{

  gchar *writer_string = NULL;

  GstIndexEntry *entry;

  GstIndexClass *iclass;

  gboolean success = FALSE;

  g_return_val_if_fail (GST_IS_INDEX (index), FALSE);

  g_return_val_if_fail (GST_IS_OBJECT (writer), FALSE);

  g_return_val_if_fail (id, FALSE);

  *id = -1;

  /* first try to get a previously cached id */

  entry = g_hash_table_lookup (index->writers, writer);

  if (entry == NULL) {

    iclass = GST_INDEX_GET_CLASS (index);

    /* let the app make a string */

    if (index->resolver) {

      gboolean res;

      res =

          index->resolver (index, writer, &writer_string,

          index->resolver_user_data);

      if (!res)

        return FALSE;

    } else {

      g_warning ("no resolver found");

      return FALSE;

    }

    /* if the index has a resolver, make it map this string to an id */

    if (iclass->get_writer_id) {

      success = iclass->get_writer_id (index, id, writer_string);

    }

    /* if the index could not resolve, we allocate one ourselves */

    if (!success) {

      *id = ++index->last_id;

    }

    entry = gst_index_add_id (index, *id, writer_string);

    if (!entry) {

      /* index is probably not writable, make an entry anyway

       * to keep it in our cache */

      entry = g_slice_new (GstIndexEntry);

      entry->type = GST_INDEX_ENTRY_ID;

      entry->id = *id;

      entry->data.id.description = writer_string;

    }

    g_hash_table_insert (index->writers, writer, entry);

  } else {

    *id = entry->id;

  }

  return TRUE;

}

static void

gst_index_add_entry (GstIndex * index, GstIndexEntry * entry)

{

  GstIndexClass *iclass;

  iclass = GST_INDEX_GET_CLASS (index);

  if (iclass->add_entry) {

    iclass->add_entry (index, entry);

  }

  g_signal_emit (index, gst_index_signals[ENTRY_ADDED], 0, entry);

}

/**

 * gst_index_add_associationv:

 * @index: the index to add the entry to

 * @id: the id of the index writer

 * @flags: optinal flags for this entry

 * @n: number of associations

 * @list: (array length=n): list of associations

 *

 * Associate given format/value pairs with each other.

 *

 * Returns: a pointer to the newly added entry in the index.

 */

GstIndexEntry *

gst_index_add_associationv (GstIndex * index, gint id,

    GstIndexAssociationFlags flags, gint n, const GstIndexAssociation * list)

{

  GstIndexEntry *entry;

  g_return_val_if_fail (n > 0, NULL);

  g_return_val_if_fail (list != NULL, NULL);

  g_return_val_if_fail (GST_IS_INDEX (index), NULL);

  if (!GST_INDEX_IS_WRITABLE (index) || id == -1)

    return NULL;

  entry = g_slice_new (GstIndexEntry);

  entry->type = GST_INDEX_ENTRY_ASSOCIATION;

  entry->id = id;

  entry->data.assoc.flags = flags;

  entry->data.assoc.assocs = g_memdup (list, sizeof (GstIndexAssociation) * n);

  entry->data.assoc.nassocs = n;

  gst_index_add_entry (index, entry);

  return entry;

}

#if 0

/**

 * gst_index_add_association:

 * @index: the index to add the entry to

 * @id: the id of the index writer

 * @flags: optinal flags for this entry

 * @format: the format of the value

 * @value: the value

 * @...: other format/value pairs or 0 to end the list

 *

 * Associate given format/value pairs with each other.

 * Be sure to pass gint64 values to this functions varargs,

 * you might want to use a gint64 cast to be sure.

 *

 * Returns: a pointer to the newly added entry in the index.

 */

GstIndexEntry *

gst_index_add_association (GstIndex * index, gint id,

    GstIndexAssociationFlags flags, GstFormat format, gint64 value, ...)

{

  va_list args;

  GstIndexEntry *entry;

  GstIndexAssociation *list;

  gint n_assocs = 0;

  GstFormat cur_format;

  GArray *array;

  g_return_val_if_fail (GST_IS_INDEX (index), NULL);

  g_return_val_if_fail (format != 0, NULL);

  if (!GST_INDEX_IS_WRITABLE (index) || id == -1)

    return NULL;

  array = g_array_new (FALSE, FALSE, sizeof (GstIndexAssociation));

  {

    GstIndexAssociation a;

    a.format = format;

    a.value = value;

    n_assocs = 1;

    g_array_append_val (array, a);

  }

  va_start (args, value);

  while ((cur_format = va_arg (args, GstFormat))) {

    GstIndexAssociation a;

    a.format = cur_format;

    a.value = va_arg (args, gint64);

    n_assocs++;

    g_array_append_val (array, a);

  }

  va_end (args);

  list = (GstIndexAssociation *) g_array_free (array, FALSE);

  entry = gst_index_add_associationv (index, id, flags, n_assocs, list);

  g_free (list);

  return entry;

}

/**

 * gst_index_add_object:

 * @index: the index to add the object to

 * @id: the id of the index writer

 * @key: a key for the object

 * @type: the GType of the object