2 * Copyright (C) 2001 RidgeRun (http://www.ridgerun.com/)
3 * Written by Erik Walthinsen <omega@ridgerun.com>
5 * gstindex.c: Index for mappings and other data
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
25 * @short_description: Generate indexes on objects
26 * @see_also: #GstIndexFactory
28 * GstIndex is used to generate a stream index of one or more elements
31 * Elements will overload the set_index and get_index virtual methods in
32 * #GstElement. When streaming data, the element will add index entries if it
35 * Each element that adds to the index will do that using a writer_id. The
36 * writer_id is obtained from gst_index_get_writer_id().
38 * The application that wants to index the stream will create a new index object
39 * using gst_index_new() or gst_index_factory_make(). The index is assigned to a
40 * specific element, a bin or the whole pipeline. This will cause indexable
41 * elements to add entires to the index while playing.
44 /* FIXME: complete gobject annotations */
45 /* FIXME-0.11: cleanup API
46 * - no one seems to use GstIndexGroup, GstIndexCertainty
48 * - the API for application to use the index is mostly missing
49 * - apps need to get a list of writers
50 * - apps need to be able to iterate over each writers index entry collection
51 * - gst_index_get_assoc_entry() should pass ownership
52 * - the GstIndexEntry structure is large and contains repetitive information
53 * - we want to allow Indexers to implement a saner storage and create
54 * GstIndexEntries on demand (the app has to free them), might even make
55 * sense to ask the app to provide a ptr and fill it.
58 #include "gst_private.h"
62 #include "gstindexfactory.h"
63 #include "gstmarshal.h"
64 #include "gstregistry.h"
65 /* for constructing an entry name */
66 #include "gstelement.h"
70 /* Index signals and args */
84 GST_DEBUG_CATEGORY_STATIC (index_debug);
85 #define GST_CAT_DEFAULT index_debug
87 static void gst_index_finalize (GObject * object);
89 static void gst_index_set_property (GObject * object, guint prop_id,
90 const GValue * value, GParamSpec * pspec);
91 static void gst_index_get_property (GObject * object, guint prop_id,
92 GValue * value, GParamSpec * pspec);
94 static GstIndexGroup *gst_index_group_new (guint groupnum);
95 static void gst_index_group_free (GstIndexGroup * group);
97 static gboolean gst_index_path_resolver (GstIndex * index, GstObject * writer,
98 gchar ** writer_string, gpointer data);
99 static gboolean gst_index_gtype_resolver (GstIndex * index, GstObject * writer,
100 gchar ** writer_string, gpointer data);
101 static void gst_index_add_entry (GstIndex * index, GstIndexEntry * entry);
103 static guint gst_index_signals[LAST_SIGNAL] = { 0 };
107 GstIndexResolverMethod method;
108 GstIndexResolver resolver;
113 static const ResolverEntry resolvers[] = {
114 {GST_INDEX_RESOLVER_CUSTOM, NULL, NULL},
115 {GST_INDEX_RESOLVER_GTYPE, gst_index_gtype_resolver, NULL},
116 {GST_INDEX_RESOLVER_PATH, gst_index_path_resolver, NULL},
119 #define GST_TYPE_INDEX_RESOLVER (gst_index_resolver_get_type())
121 gst_index_resolver_get_type (void)
123 static GType index_resolver_type = 0;
124 static const GEnumValue index_resolver[] = {
125 {GST_INDEX_RESOLVER_CUSTOM, "GST_INDEX_RESOLVER_CUSTOM", "custom"},
126 {GST_INDEX_RESOLVER_GTYPE, "GST_INDEX_RESOLVER_GTYPE", "gtype"},
127 {GST_INDEX_RESOLVER_PATH, "GST_INDEX_RESOLVER_PATH", "path"},
131 if (!index_resolver_type) {
132 index_resolver_type =
133 g_enum_register_static ("GstIndexResolver", index_resolver);
135 return index_resolver_type;
139 gst_index_entry_get_type (void)
141 static GType index_entry_type = 0;
143 if (!index_entry_type) {
144 index_entry_type = g_boxed_type_register_static ("GstIndexEntry",
145 (GBoxedCopyFunc) gst_index_entry_copy,
146 (GBoxedFreeFunc) gst_index_entry_free);
148 return index_entry_type;
153 GST_DEBUG_CATEGORY_INIT (index_debug, "GST_INDEX", GST_DEBUG_BOLD, \
154 "Generic indexing support"); \
157 #define gst_index_parent_class parent_class
158 G_DEFINE_TYPE_WITH_CODE (GstIndex, gst_index, GST_TYPE_OBJECT, _do_init);
161 gst_index_class_init (GstIndexClass * klass)
163 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
166 * GstIndex::entry-added
167 * @gstindex: the object which received the signal.
168 * @arg1: The entry added to the index.
170 * Is emitted when a new entry is added to the index.
172 gst_index_signals[ENTRY_ADDED] =
173 g_signal_new ("entry-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
174 G_STRUCT_OFFSET (GstIndexClass, entry_added), NULL, NULL,
175 gst_marshal_VOID__BOXED, G_TYPE_NONE, 1, GST_TYPE_INDEX_ENTRY);
177 gobject_class->set_property = gst_index_set_property;
178 gobject_class->get_property = gst_index_get_property;
179 gobject_class->finalize = gst_index_finalize;
181 g_object_class_install_property (gobject_class, ARG_RESOLVER,
182 g_param_spec_enum ("resolver", "Resolver",
183 "Select a predefined object to string mapper",
184 GST_TYPE_INDEX_RESOLVER, GST_INDEX_RESOLVER_PATH,
185 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
189 gst_index_init (GstIndex * index)
191 index->curgroup = gst_index_group_new (0);
193 index->groups = g_list_prepend (NULL, index->curgroup);
195 index->writers = g_hash_table_new (NULL, NULL);
198 index->method = GST_INDEX_RESOLVER_PATH;
199 index->resolver = resolvers[index->method].resolver;
200 index->resolver_user_data = resolvers[index->method].user_data;
202 GST_OBJECT_FLAG_SET (index, GST_INDEX_WRITABLE);
203 GST_OBJECT_FLAG_SET (index, GST_INDEX_READABLE);
205 GST_DEBUG ("created new index");
209 gst_index_free_writer (gpointer key, gpointer value, gpointer user_data)
211 GstIndexEntry *entry = (GstIndexEntry *) value;
214 gst_index_entry_free (entry);
219 gst_index_finalize (GObject * object)
221 GstIndex *index = GST_INDEX (object);
224 g_list_foreach (index->groups, (GFunc) gst_index_group_free, NULL);
225 g_list_free (index->groups);
226 index->groups = NULL;
229 if (index->writers) {
230 g_hash_table_foreach (index->writers, gst_index_free_writer, NULL);
231 g_hash_table_destroy (index->writers);
232 index->writers = NULL;
235 if (index->filter_user_data && index->filter_user_data_destroy)
236 index->filter_user_data_destroy (index->filter_user_data);
238 if (index->resolver_user_data && index->resolver_user_data_destroy)
239 index->resolver_user_data_destroy (index->resolver_user_data);
241 G_OBJECT_CLASS (parent_class)->finalize (object);
245 gst_index_set_property (GObject * object, guint prop_id,
246 const GValue * value, GParamSpec * pspec)
250 index = GST_INDEX (object);
254 index->method = (GstIndexResolverMethod) g_value_get_enum (value);
255 index->resolver = resolvers[index->method].resolver;
256 index->resolver_user_data = resolvers[index->method].user_data;
259 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
265 gst_index_get_property (GObject * object, guint prop_id,
266 GValue * value, GParamSpec * pspec)
270 index = GST_INDEX (object);
274 g_value_set_enum (value, index->method);
277 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
282 static GstIndexGroup *
283 gst_index_group_new (guint groupnum)
285 GstIndexGroup *indexgroup = g_slice_new (GstIndexGroup);
287 indexgroup->groupnum = groupnum;
288 indexgroup->entries = NULL;
289 indexgroup->certainty = GST_INDEX_UNKNOWN;
290 indexgroup->peergroup = -1;
292 GST_DEBUG ("created new index group %d", groupnum);
298 gst_index_group_free (GstIndexGroup * group)
300 g_slice_free (GstIndexGroup, group);
306 * Create a new dummy index object. Use gst_element_set_index() to assign that
307 * to an element or pipeline. This index is not storing anything, but will
308 * still emit e.g. the #GstIndex::entry-added signal.
310 * Returns: (transfer full): a new index object
317 index = g_object_newv (gst_index_get_type (), 0, NULL);
324 * @index: the index to commit
325 * @id: the writer that commited the index
327 * Tell the index that the writer with the given id is done
328 * with this index and is not going to write any more entries
332 gst_index_commit (GstIndex * index, gint id)
334 GstIndexClass *iclass;
336 iclass = GST_INDEX_GET_CLASS (index);
339 iclass->commit (index, id);
344 * gst_index_get_group:
345 * @index: the index to get the current group from
347 * Get the id of the current group.
349 * Returns: the id of the current group.
352 gst_index_get_group (GstIndex * index)
354 return index->curgroup->groupnum;
358 * gst_index_new_group:
359 * @index: the index to create the new group in
361 * Create a new group for the given index. It will be
362 * set as the current group.
364 * Returns: the id of the newly created group.
367 gst_index_new_group (GstIndex * index)
369 index->curgroup = gst_index_group_new (++index->maxgroup);
370 index->groups = g_list_append (index->groups, index->curgroup);
371 GST_DEBUG ("created new group %d in index", index->maxgroup);
372 return index->maxgroup;
376 * gst_index_set_group:
377 * @index: the index to set the new group in
378 * @groupnum: the groupnumber to set
380 * Set the current groupnumber to the given argument.
382 * Returns: TRUE if the operation succeeded, FALSE if the group
386 gst_index_set_group (GstIndex * index, gint groupnum)
389 GstIndexGroup *indexgroup;
391 /* first check for null change */
392 if (groupnum == index->curgroup->groupnum)
395 /* else search for the proper group */
396 list = index->groups;
398 indexgroup = (GstIndexGroup *) (list->data);
399 list = g_list_next (list);
400 if (indexgroup->groupnum == groupnum) {
401 index->curgroup = indexgroup;
402 GST_DEBUG ("switched to index group %d", indexgroup->groupnum);
407 /* couldn't find the group in question */
408 GST_DEBUG ("couldn't find index group %d", groupnum);
413 * gst_index_set_certainty:
414 * @index: the index to set the certainty on
415 * @certainty: the certainty to set
417 * Set the certainty of the given index.
420 gst_index_set_certainty (GstIndex * index, GstIndexCertainty certainty)
422 index->curgroup->certainty = certainty;
426 * gst_index_get_certainty:
427 * @index: the index to get the certainty of
429 * Get the certainty of the given index.
431 * Returns: the certainty of the index.
434 gst_index_get_certainty (GstIndex * index)
436 return index->curgroup->certainty;
440 * gst_index_set_filter:
441 * @index: the index to register the filter on
442 * @filter: the filter to register
443 * @user_data: data passed to the filter function
445 * Lets the app register a custom filter function so that
446 * it can select what entries should be stored in the index.
449 gst_index_set_filter (GstIndex * index,
450 GstIndexFilter filter, gpointer user_data)
452 g_return_if_fail (GST_IS_INDEX (index));
454 gst_index_set_filter_full (index, filter, user_data, NULL);
458 * gst_index_set_filter_full:
459 * @index: the index to register the filter on
460 * @filter: the filter to register
461 * @user_data: data passed to the filter function
462 * @user_data_destroy: function to call when @user_data is unset
464 * Lets the app register a custom filter function so that
465 * it can select what entries should be stored in the index.
468 gst_index_set_filter_full (GstIndex * index,
469 GstIndexFilter filter, gpointer user_data, GDestroyNotify user_data_destroy)
471 g_return_if_fail (GST_IS_INDEX (index));
473 if (index->filter_user_data && index->filter_user_data_destroy)
474 index->filter_user_data_destroy (index->filter_user_data);
476 index->filter = filter;
477 index->filter_user_data = user_data;
478 index->filter_user_data_destroy = user_data_destroy;
482 * gst_index_set_resolver:
483 * @index: the index to register the resolver on
484 * @resolver: the resolver to register
485 * @user_data: data passed to the resolver function
487 * Lets the app register a custom function to map index
488 * ids to writer descriptions.
491 gst_index_set_resolver (GstIndex * index,
492 GstIndexResolver resolver, gpointer user_data)
494 gst_index_set_resolver_full (index, resolver, user_data, NULL);
498 * gst_index_set_resolver_full:
499 * @index: the index to register the resolver on
500 * @resolver: the resolver to register
501 * @user_data: data passed to the resolver function
502 * @user_data_destroy: destroy function for @user_data
504 * Lets the app register a custom function to map index
505 * ids to writer descriptions.
510 gst_index_set_resolver_full (GstIndex * index, GstIndexResolver resolver,
511 gpointer user_data, GDestroyNotify user_data_destroy)
513 g_return_if_fail (GST_IS_INDEX (index));
515 if (index->resolver_user_data && index->resolver_user_data_destroy)
516 index->resolver_user_data_destroy (index->resolver_user_data);
518 index->resolver = resolver;
519 index->resolver_user_data = user_data;
520 index->resolver_user_data_destroy = user_data_destroy;
521 index->method = GST_INDEX_RESOLVER_CUSTOM;
525 * gst_index_entry_copy:
526 * @entry: the entry to copy
528 * Copies an entry and returns the result.
530 * Free-function: gst_index_entry_free
532 * Returns: (transfer full): a newly allocated #GstIndexEntry.
535 gst_index_entry_copy (GstIndexEntry * entry)
537 GstIndexEntry *new_entry = g_slice_new (GstIndexEntry);
539 memcpy (new_entry, entry, sizeof (GstIndexEntry));
544 * gst_index_entry_free:
545 * @entry: (transfer full): the entry to free
547 * Free the memory used by the given entry.
550 gst_index_entry_free (GstIndexEntry * entry)
552 switch (entry->type) {
553 case GST_INDEX_ENTRY_ID:
554 if (entry->data.id.description) {
555 g_free (entry->data.id.description);
556 entry->data.id.description = NULL;
559 case GST_INDEX_ENTRY_ASSOCIATION:
560 if (entry->data.assoc.assocs) {
561 g_free (entry->data.assoc.assocs);
562 entry->data.assoc.assocs = NULL;
565 case GST_INDEX_ENTRY_OBJECT:
567 case GST_INDEX_ENTRY_FORMAT:
571 g_slice_free (GstIndexEntry, entry);
575 * gst_index_add_format:
576 * @index: the index to add the entry to
577 * @id: the id of the index writer
578 * @format: the format to add to the index
580 * Adds a format entry into the index. This function is
581 * used to map dynamic GstFormat ids to their original
584 * Free-function: gst_index_entry_free
586 * Returns: (transfer full): a pointer to the newly added entry in the index.
589 gst_index_add_format (GstIndex * index, gint id, GstFormat format)
591 GstIndexEntry *entry;
592 const GstFormatDefinition *def;
594 g_return_val_if_fail (GST_IS_INDEX (index), NULL);
595 g_return_val_if_fail (format != 0, NULL);
597 if (!GST_INDEX_IS_WRITABLE (index) || id == -1)
600 entry = g_slice_new (GstIndexEntry);
601 entry->type = GST_INDEX_ENTRY_FORMAT;
603 entry->data.format.format = format;
605 def = gst_format_get_details (format);
606 entry->data.format.key = def->nick;
608 gst_index_add_entry (index, entry);
615 * @index: the index to add the entry to
616 * @id: the id of the index writer
617 * @description: the description of the index writer
619 * Add an id entry into the index.
621 * Returns: a pointer to the newly added entry in the index.
624 gst_index_add_id (GstIndex * index, gint id, gchar * description)
626 GstIndexEntry *entry;
628 g_return_val_if_fail (GST_IS_INDEX (index), NULL);
629 g_return_val_if_fail (description != NULL, NULL);
631 if (!GST_INDEX_IS_WRITABLE (index) || id == -1)
634 entry = g_slice_new (GstIndexEntry);
635 entry->type = GST_INDEX_ENTRY_ID;
637 entry->data.id.description = description;
639 gst_index_add_entry (index, entry);
645 gst_index_path_resolver (GstIndex * index, GstObject * writer,
646 gchar ** writer_string, gpointer data)
648 *writer_string = gst_object_get_path_string (writer);
654 gst_index_gtype_resolver (GstIndex * index, GstObject * writer,
655 gchar ** writer_string, gpointer data)
657 g_return_val_if_fail (writer != NULL, FALSE);
659 if (GST_IS_PAD (writer)) {
660 GstObject *element = gst_object_get_parent (GST_OBJECT (writer));
663 name = gst_object_get_name (writer);
665 *writer_string = g_strdup_printf ("%s.%s",
666 G_OBJECT_TYPE_NAME (element), name);
667 gst_object_unref (element);
669 *writer_string = name;
676 *writer_string = g_strdup (G_OBJECT_TYPE_NAME (writer));
683 * gst_index_get_writer_id:
684 * @index: the index to get a unique write id for
685 * @writer: the GstObject to allocate an id for
686 * @id: a pointer to a gint to hold the id
688 * Before entries can be added to the index, a writer
689 * should obtain a unique id. The methods to add new entries
690 * to the index require this id as an argument.
692 * The application can implement a custom function to map the writer object
693 * to a string. That string will be used to register or look up an id
697 * The caller must not hold @writer's #GST_OBJECT_LOCK, as the default
698 * resolver may call functions that take the object lock as well, and
699 * the lock is not recursive.
702 * Returns: TRUE if the writer would be mapped to an id.
705 gst_index_get_writer_id (GstIndex * index, GstObject * writer, gint * id)
707 gchar *writer_string = NULL;
708 GstIndexEntry *entry;
709 GstIndexClass *iclass;
710 gboolean success = FALSE;
712 g_return_val_if_fail (GST_IS_INDEX (index), FALSE);
713 g_return_val_if_fail (GST_IS_OBJECT (writer), FALSE);
714 g_return_val_if_fail (id, FALSE);
718 /* first try to get a previously cached id */
719 entry = g_hash_table_lookup (index->writers, writer);
722 iclass = GST_INDEX_GET_CLASS (index);
724 /* let the app make a string */
725 if (index->resolver) {
729 index->resolver (index, writer, &writer_string,
730 index->resolver_user_data);
734 g_warning ("no resolver found");
738 /* if the index has a resolver, make it map this string to an id */
739 if (iclass->get_writer_id) {
740 success = iclass->get_writer_id (index, id, writer_string);
742 /* if the index could not resolve, we allocate one ourselves */
744 *id = ++index->last_id;
747 entry = gst_index_add_id (index, *id, writer_string);
749 /* index is probably not writable, make an entry anyway
750 * to keep it in our cache */
751 entry = g_slice_new (GstIndexEntry);
752 entry->type = GST_INDEX_ENTRY_ID;
754 entry->data.id.description = writer_string;
756 g_hash_table_insert (index->writers, writer, entry);
765 gst_index_add_entry (GstIndex * index, GstIndexEntry * entry)
767 GstIndexClass *iclass;
769 iclass = GST_INDEX_GET_CLASS (index);
771 if (iclass->add_entry) {
772 iclass->add_entry (index, entry);
775 g_signal_emit (index, gst_index_signals[ENTRY_ADDED], 0, entry);
779 * gst_index_add_associationv:
780 * @index: the index to add the entry to
781 * @id: the id of the index writer
782 * @flags: optinal flags for this entry
783 * @n: number of associations
784 * @list: list of associations
786 * Associate given format/value pairs with each other.
788 * Returns: a pointer to the newly added entry in the index.
791 gst_index_add_associationv (GstIndex * index, gint id, GstAssocFlags flags,
792 gint n, const GstIndexAssociation * list)
794 GstIndexEntry *entry;
796 g_return_val_if_fail (n > 0, NULL);
797 g_return_val_if_fail (list != NULL, NULL);
798 g_return_val_if_fail (GST_IS_INDEX (index), NULL);
800 if (!GST_INDEX_IS_WRITABLE (index) || id == -1)
803 entry = g_slice_new (GstIndexEntry);
805 entry->type = GST_INDEX_ENTRY_ASSOCIATION;
807 entry->data.assoc.flags = flags;
808 entry->data.assoc.assocs = g_memdup (list, sizeof (GstIndexAssociation) * n);
809 entry->data.assoc.nassocs = n;
811 gst_index_add_entry (index, entry);
817 * gst_index_add_association:
818 * @index: the index to add the entry to
819 * @id: the id of the index writer
820 * @flags: optinal flags for this entry
821 * @format: the format of the value
823 * @...: other format/value pairs or 0 to end the list
825 * Associate given format/value pairs with each other.
826 * Be sure to pass gint64 values to this functions varargs,
827 * you might want to use a gint64 cast to be sure.
829 * Returns: a pointer to the newly added entry in the index.
832 gst_index_add_association (GstIndex * index, gint id, GstAssocFlags flags,
833 GstFormat format, gint64 value, ...)
836 GstIndexEntry *entry;
837 GstIndexAssociation *list;
839 GstFormat cur_format;
842 g_return_val_if_fail (GST_IS_INDEX (index), NULL);
843 g_return_val_if_fail (format != 0, NULL);
845 if (!GST_INDEX_IS_WRITABLE (index) || id == -1)
848 array = g_array_new (FALSE, FALSE, sizeof (GstIndexAssociation));
851 GstIndexAssociation a;
856 g_array_append_val (array, a);
859 va_start (args, value);
861 while ((cur_format = va_arg (args, GstFormat))) {
862 GstIndexAssociation a;
864 a.format = cur_format;
865 a.value = va_arg (args, gint64);
867 g_array_append_val (array, a);
872 list = (GstIndexAssociation *) g_array_free (array, FALSE);
874 entry = gst_index_add_associationv (index, id, flags, n_assocs, list);
881 * gst_index_add_object:
882 * @index: the index to add the object to
883 * @id: the id of the index writer
884 * @key: a key for the object
885 * @type: the GType of the object
886 * @object: a pointer to the object to add
888 * Add the given object to the index with the given key.
890 * This function is not yet implemented.
892 * Returns: a pointer to the newly added entry in the index.
895 gst_index_add_object (GstIndex * index, gint id, gchar * key,
896 GType type, gpointer object)
898 if (!GST_INDEX_IS_WRITABLE (index) || id == -1)
905 gst_index_compare_func (gconstpointer a, gconstpointer b, gpointer user_data)
915 * gst_index_get_assoc_entry:
916 * @index: the index to search
917 * @id: the id of the index writer
918 * @method: The lookup method to use
919 * @flags: Flags for the entry
920 * @format: the format of the value
921 * @value: the value to find
923 * Finds the given format/value in the index
925 * Returns: the entry associated with the value or NULL if the
926 * value was not found.
929 gst_index_get_assoc_entry (GstIndex * index, gint id,
930 GstIndexLookupMethod method, GstAssocFlags flags,
931 GstFormat format, gint64 value)
933 g_return_val_if_fail (GST_IS_INDEX (index), NULL);
938 return gst_index_get_assoc_entry_full (index, id, method, flags, format,
939 value, gst_index_compare_func, NULL);
943 * gst_index_get_assoc_entry_full:
944 * @index: the index to search
945 * @id: the id of the index writer
946 * @method: The lookup method to use
947 * @flags: Flags for the entry
948 * @format: the format of the value
949 * @value: the value to find
950 * @func: the function used to compare entries
951 * @user_data: user data passed to the compare function
953 * Finds the given format/value in the index with the given
954 * compare function and user_data.
956 * Returns: the entry associated with the value or NULL if the
957 * value was not found.
960 gst_index_get_assoc_entry_full (GstIndex * index, gint id,
961 GstIndexLookupMethod method, GstAssocFlags flags,
962 GstFormat format, gint64 value, GCompareDataFunc func, gpointer user_data)
964 GstIndexClass *iclass;
966 g_return_val_if_fail (GST_IS_INDEX (index), NULL);
971 iclass = GST_INDEX_GET_CLASS (index);
973 if (iclass->get_assoc_entry)
974 return iclass->get_assoc_entry (index, id, method, flags, format, value,
981 * gst_index_entry_assoc_map:
982 * @entry: the index to search
983 * @format: the format of the value the find
984 * @value: a pointer to store the value
986 * Gets alternative formats associated with the indexentry.
988 * Returns: TRUE if there was a value associated with the given
992 gst_index_entry_assoc_map (GstIndexEntry * entry,
993 GstFormat format, gint64 * value)
997 g_return_val_if_fail (entry != NULL, FALSE);
998 g_return_val_if_fail (value != NULL, FALSE);
1000 for (i = 0; i < GST_INDEX_NASSOCS (entry); i++) {
1001 if (GST_INDEX_ASSOC_FORMAT (entry, i) == format) {
1002 *value = GST_INDEX_ASSOC_VALUE (entry, i);