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1007 lines
26 KiB
C
1007 lines
26 KiB
C
/* GStreamer
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* Copyright (C) 2001 RidgeRun (http://www.ridgerun.com/)
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* Written by Erik Walthinsen <omega@ridgerun.com>
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*
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* gstindex.c: Index for mappings and other data
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gstindex
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* @short_description: Generate indexes on objects
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* @see_also: #GstIndexFactory
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*
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* GstIndex is used to generate a stream index of one or more elements
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* in a pipeline.
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*
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* Elements will overload the set_index and get_index virtual methods in
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* #GstElement. When streaming data, the element will add index entries if it
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* has an index set.
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*
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* Each element that adds to the index will do that using a writer_id. The
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* writer_id is obtained from gst_index_get_writer_id().
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*
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* The application that wants to index the stream will create a new index object
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* using gst_index_new() or gst_index_factory_make(). The index is assigned to a
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* specific element, a bin or the whole pipeline. This will cause indexable
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* elements to add entires to the index while playing.
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*/
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/* FIXME: complete gobject annotations */
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/* FIXME-0.11: cleanup API
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* - no one seems to use GstIndexGroup, GstIndexCertainty
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*
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* - the API for application to use the index is mostly missing
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* - apps need to get a list of writers
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* - apps need to be able to iterate over each writers index entry collection
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* - gst_index_get_assoc_entry() should pass ownership
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* - the GstIndexEntry structure is large and contains repetitive information
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* - we want to allow Indexers to implement a saner storage and create
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* GstIndexEntries on demand (the app has to free them), might even make
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* sense to ask the app to provide a ptr and fill it.
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*/
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#include "gst_private.h"
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#include "gstinfo.h"
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#include "gstindex.h"
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#include "gstindexfactory.h"
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#include "gstmarshal.h"
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#include "gstregistry.h"
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/* for constructing an entry name */
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#include "gstelement.h"
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#include "gstpad.h"
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#include "gstinfo.h"
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/* Index signals and args */
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enum
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{
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ENTRY_ADDED,
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_RESOLVER
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/* FILL ME */
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};
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GST_DEBUG_CATEGORY_STATIC (index_debug);
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#define GST_CAT_DEFAULT index_debug
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static void gst_index_finalize (GObject * object);
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static void gst_index_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_index_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstIndexGroup *gst_index_group_new (guint groupnum);
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static void gst_index_group_free (GstIndexGroup * group);
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static gboolean gst_index_path_resolver (GstIndex * index, GstObject * writer,
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gchar ** writer_string, gpointer data);
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static gboolean gst_index_gtype_resolver (GstIndex * index, GstObject * writer,
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gchar ** writer_string, gpointer data);
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static void gst_index_add_entry (GstIndex * index, GstIndexEntry * entry);
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static guint gst_index_signals[LAST_SIGNAL] = { 0 };
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typedef struct
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{
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GstIndexResolverMethod method;
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GstIndexResolver resolver;
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gpointer user_data;
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}
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ResolverEntry;
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static const ResolverEntry resolvers[] = {
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{GST_INDEX_RESOLVER_CUSTOM, NULL, NULL},
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{GST_INDEX_RESOLVER_GTYPE, gst_index_gtype_resolver, NULL},
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{GST_INDEX_RESOLVER_PATH, gst_index_path_resolver, NULL},
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};
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#define GST_TYPE_INDEX_RESOLVER (gst_index_resolver_get_type())
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static GType
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gst_index_resolver_get_type (void)
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{
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static GType index_resolver_type = 0;
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static const GEnumValue index_resolver[] = {
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{GST_INDEX_RESOLVER_CUSTOM, "GST_INDEX_RESOLVER_CUSTOM", "custom"},
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{GST_INDEX_RESOLVER_GTYPE, "GST_INDEX_RESOLVER_GTYPE", "gtype"},
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{GST_INDEX_RESOLVER_PATH, "GST_INDEX_RESOLVER_PATH", "path"},
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{0, NULL, NULL},
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};
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if (!index_resolver_type) {
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index_resolver_type =
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g_enum_register_static ("GstIndexResolver", index_resolver);
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}
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return index_resolver_type;
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}
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GType
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gst_index_entry_get_type (void)
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{
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static GType index_entry_type = 0;
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if (!index_entry_type) {
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index_entry_type = g_boxed_type_register_static ("GstIndexEntry",
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(GBoxedCopyFunc) gst_index_entry_copy,
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(GBoxedFreeFunc) gst_index_entry_free);
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}
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return index_entry_type;
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}
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#define _do_init \
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{ \
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GST_DEBUG_CATEGORY_INIT (index_debug, "GST_INDEX", GST_DEBUG_BOLD, \
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"Generic indexing support"); \
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}
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#define gst_index_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstIndex, gst_index, GST_TYPE_OBJECT, _do_init);
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static void
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gst_index_class_init (GstIndexClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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/**
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* GstIndex::entry-added
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* @gstindex: the object which received the signal.
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* @arg1: The entry added to the index.
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*
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* Is emitted when a new entry is added to the index.
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*/
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gst_index_signals[ENTRY_ADDED] =
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g_signal_new ("entry-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstIndexClass, entry_added), NULL, NULL,
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gst_marshal_VOID__BOXED, G_TYPE_NONE, 1, GST_TYPE_INDEX_ENTRY);
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gobject_class->set_property = gst_index_set_property;
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gobject_class->get_property = gst_index_get_property;
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gobject_class->finalize = gst_index_finalize;
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g_object_class_install_property (gobject_class, ARG_RESOLVER,
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g_param_spec_enum ("resolver", "Resolver",
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"Select a predefined object to string mapper",
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GST_TYPE_INDEX_RESOLVER, GST_INDEX_RESOLVER_PATH,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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gst_index_init (GstIndex * index)
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{
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index->curgroup = gst_index_group_new (0);
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index->maxgroup = 0;
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index->groups = g_list_prepend (NULL, index->curgroup);
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index->writers = g_hash_table_new (NULL, NULL);
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index->last_id = 0;
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index->method = GST_INDEX_RESOLVER_PATH;
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index->resolver = resolvers[index->method].resolver;
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index->resolver_user_data = resolvers[index->method].user_data;
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GST_OBJECT_FLAG_SET (index, GST_INDEX_WRITABLE);
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GST_OBJECT_FLAG_SET (index, GST_INDEX_READABLE);
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GST_DEBUG ("created new index");
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}
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static void
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gst_index_free_writer (gpointer key, gpointer value, gpointer user_data)
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{
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GstIndexEntry *entry = (GstIndexEntry *) value;
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if (entry) {
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gst_index_entry_free (entry);
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}
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}
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static void
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gst_index_finalize (GObject * object)
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{
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GstIndex *index = GST_INDEX (object);
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if (index->groups) {
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g_list_foreach (index->groups, (GFunc) gst_index_group_free, NULL);
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g_list_free (index->groups);
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index->groups = NULL;
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}
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if (index->writers) {
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g_hash_table_foreach (index->writers, gst_index_free_writer, NULL);
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g_hash_table_destroy (index->writers);
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index->writers = NULL;
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}
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if (index->filter_user_data && index->filter_user_data_destroy)
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index->filter_user_data_destroy (index->filter_user_data);
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if (index->resolver_user_data && index->resolver_user_data_destroy)
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index->resolver_user_data_destroy (index->resolver_user_data);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_index_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstIndex *index;
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index = GST_INDEX (object);
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switch (prop_id) {
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case ARG_RESOLVER:
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index->method = (GstIndexResolverMethod) g_value_get_enum (value);
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index->resolver = resolvers[index->method].resolver;
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index->resolver_user_data = resolvers[index->method].user_data;
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_index_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstIndex *index;
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index = GST_INDEX (object);
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switch (prop_id) {
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case ARG_RESOLVER:
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g_value_set_enum (value, index->method);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstIndexGroup *
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gst_index_group_new (guint groupnum)
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{
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GstIndexGroup *indexgroup = g_slice_new (GstIndexGroup);
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indexgroup->groupnum = groupnum;
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indexgroup->entries = NULL;
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indexgroup->certainty = GST_INDEX_UNKNOWN;
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indexgroup->peergroup = -1;
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GST_DEBUG ("created new index group %d", groupnum);
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return indexgroup;
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}
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static void
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gst_index_group_free (GstIndexGroup * group)
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{
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g_slice_free (GstIndexGroup, group);
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}
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/**
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* gst_index_new:
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*
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* Create a new dummy index object. Use gst_element_set_index() to assign that
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* to an element or pipeline. This index is not storing anything, but will
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* still emit e.g. the #GstIndex::entry-added signal.
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*
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* Returns: (transfer full): a new index object
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*/
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GstIndex *
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gst_index_new (void)
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{
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GstIndex *index;
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index = g_object_newv (gst_index_get_type (), 0, NULL);
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return index;
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}
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/**
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* gst_index_commit:
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* @index: the index to commit
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* @id: the writer that commited the index
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*
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* Tell the index that the writer with the given id is done
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* with this index and is not going to write any more entries
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* to it.
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*/
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void
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gst_index_commit (GstIndex * index, gint id)
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{
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GstIndexClass *iclass;
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iclass = GST_INDEX_GET_CLASS (index);
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if (iclass->commit)
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iclass->commit (index, id);
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}
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/**
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* gst_index_get_group:
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* @index: the index to get the current group from
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*
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* Get the id of the current group.
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*
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* Returns: the id of the current group.
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*/
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gint
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gst_index_get_group (GstIndex * index)
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{
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return index->curgroup->groupnum;
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}
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/**
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* gst_index_new_group:
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* @index: the index to create the new group in
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*
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* Create a new group for the given index. It will be
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* set as the current group.
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*
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* Returns: the id of the newly created group.
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*/
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gint
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gst_index_new_group (GstIndex * index)
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{
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index->curgroup = gst_index_group_new (++index->maxgroup);
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index->groups = g_list_append (index->groups, index->curgroup);
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GST_DEBUG ("created new group %d in index", index->maxgroup);
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return index->maxgroup;
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}
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/**
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* gst_index_set_group:
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* @index: the index to set the new group in
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* @groupnum: the groupnumber to set
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*
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* Set the current groupnumber to the given argument.
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*
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* Returns: TRUE if the operation succeeded, FALSE if the group
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* did not exist.
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*/
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gboolean
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gst_index_set_group (GstIndex * index, gint groupnum)
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{
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GList *list;
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GstIndexGroup *indexgroup;
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/* first check for null change */
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if (groupnum == index->curgroup->groupnum)
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return TRUE;
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/* else search for the proper group */
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list = index->groups;
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while (list) {
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indexgroup = (GstIndexGroup *) (list->data);
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list = g_list_next (list);
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if (indexgroup->groupnum == groupnum) {
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index->curgroup = indexgroup;
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GST_DEBUG ("switched to index group %d", indexgroup->groupnum);
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return TRUE;
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}
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}
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/* couldn't find the group in question */
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GST_DEBUG ("couldn't find index group %d", groupnum);
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return FALSE;
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}
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/**
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* gst_index_set_certainty:
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* @index: the index to set the certainty on
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* @certainty: the certainty to set
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*
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* Set the certainty of the given index.
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*/
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void
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gst_index_set_certainty (GstIndex * index, GstIndexCertainty certainty)
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{
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index->curgroup->certainty = certainty;
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}
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/**
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* gst_index_get_certainty:
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* @index: the index to get the certainty of
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*
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* Get the certainty of the given index.
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*
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* Returns: the certainty of the index.
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*/
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GstIndexCertainty
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gst_index_get_certainty (GstIndex * index)
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{
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return index->curgroup->certainty;
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}
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/**
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* gst_index_set_filter:
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* @index: the index to register the filter on
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* @filter: the filter to register
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* @user_data: data passed to the filter function
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*
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* Lets the app register a custom filter function so that
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* it can select what entries should be stored in the index.
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*/
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void
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gst_index_set_filter (GstIndex * index,
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GstIndexFilter filter, gpointer user_data)
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{
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g_return_if_fail (GST_IS_INDEX (index));
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gst_index_set_filter_full (index, filter, user_data, NULL);
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}
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/**
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* gst_index_set_filter_full:
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* @index: the index to register the filter on
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* @filter: the filter to register
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* @user_data: data passed to the filter function
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* @user_data_destroy: function to call when @user_data is unset
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*
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* Lets the app register a custom filter function so that
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* it can select what entries should be stored in the index.
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*/
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void
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gst_index_set_filter_full (GstIndex * index,
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GstIndexFilter filter, gpointer user_data, GDestroyNotify user_data_destroy)
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{
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g_return_if_fail (GST_IS_INDEX (index));
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if (index->filter_user_data && index->filter_user_data_destroy)
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index->filter_user_data_destroy (index->filter_user_data);
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index->filter = filter;
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index->filter_user_data = user_data;
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index->filter_user_data_destroy = user_data_destroy;
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}
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/**
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* gst_index_set_resolver:
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* @index: the index to register the resolver on
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* @resolver: the resolver to register
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* @user_data: data passed to the resolver function
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*
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* Lets the app register a custom function to map index
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* ids to writer descriptions.
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*/
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void
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gst_index_set_resolver (GstIndex * index,
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GstIndexResolver resolver, gpointer user_data)
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{
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gst_index_set_resolver_full (index, resolver, user_data, NULL);
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}
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/**
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* gst_index_set_resolver_full:
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* @index: the index to register the resolver on
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* @resolver: the resolver to register
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* @user_data: data passed to the resolver function
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* @user_data_destroy: destroy function for @user_data
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*
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* Lets the app register a custom function to map index
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* ids to writer descriptions.
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*
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* Since: 0.10.18
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*/
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void
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gst_index_set_resolver_full (GstIndex * index, GstIndexResolver resolver,
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gpointer user_data, GDestroyNotify user_data_destroy)
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{
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g_return_if_fail (GST_IS_INDEX (index));
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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;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* <note>
|
|
* 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.
|
|
* </note>
|
|
*
|
|
* 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: 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, GstAssocFlags 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;
|
|
}
|
|
|
|
/**
|
|
* 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, GstAssocFlags 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
|
|
* @object: a pointer to the object to add
|
|
*
|
|
* Add the given object to the index with the given key.
|
|
*
|
|
* This function is not yet implemented.
|
|
*
|
|
* Returns: a pointer to the newly added entry in the index.
|
|
*/
|
|
GstIndexEntry *
|
|
gst_index_add_object (GstIndex * index, gint id, gchar * key,
|
|
GType type, gpointer object)
|
|
{
|
|
if (!GST_INDEX_IS_WRITABLE (index) || id == -1)
|
|
return NULL;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static gint
|
|
gst_index_compare_func (gconstpointer a, gconstpointer b, gpointer user_data)
|
|
{
|
|
if (a < b)
|
|
return -1;
|
|
if (a > b)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gst_index_get_assoc_entry:
|
|
* @index: the index to search
|
|
* @id: the id of the index writer
|
|
* @method: The lookup method to use
|
|
* @flags: Flags for the entry
|
|
* @format: the format of the value
|
|
* @value: the value to find
|
|
*
|
|
* Finds the given format/value in the index
|
|
*
|
|
* Returns: the entry associated with the value or NULL if the
|
|
* value was not found.
|
|
*/
|
|
GstIndexEntry *
|
|
gst_index_get_assoc_entry (GstIndex * index, gint id,
|
|
GstIndexLookupMethod method, GstAssocFlags flags,
|
|
GstFormat format, gint64 value)
|
|
{
|
|
g_return_val_if_fail (GST_IS_INDEX (index), NULL);
|
|
|
|
if (id == -1)
|
|
return NULL;
|
|
|
|
return gst_index_get_assoc_entry_full (index, id, method, flags, format,
|
|
value, gst_index_compare_func, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_index_get_assoc_entry_full:
|
|
* @index: the index to search
|
|
* @id: the id of the index writer
|
|
* @method: The lookup method to use
|
|
* @flags: Flags for the entry
|
|
* @format: the format of the value
|
|
* @value: the value to find
|
|
* @func: the function used to compare entries
|
|
* @user_data: user data passed to the compare function
|
|
*
|
|
* Finds the given format/value in the index with the given
|
|
* compare function and user_data.
|
|
*
|
|
* Returns: the entry associated with the value or NULL if the
|
|
* value was not found.
|
|
*/
|
|
GstIndexEntry *
|
|
gst_index_get_assoc_entry_full (GstIndex * index, gint id,
|
|
GstIndexLookupMethod method, GstAssocFlags flags,
|
|
GstFormat format, gint64 value, GCompareDataFunc func, gpointer user_data)
|
|
{
|
|
GstIndexClass *iclass;
|
|
|
|
g_return_val_if_fail (GST_IS_INDEX (index), NULL);
|
|
|
|
if (id == -1)
|
|
return NULL;
|
|
|
|
iclass = GST_INDEX_GET_CLASS (index);
|
|
|
|
if (iclass->get_assoc_entry)
|
|
return iclass->get_assoc_entry (index, id, method, flags, format, value,
|
|
func, user_data);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gst_index_entry_assoc_map:
|
|
* @entry: the index to search
|
|
* @format: the format of the value the find
|
|
* @value: a pointer to store the value
|
|
*
|
|
* Gets alternative formats associated with the indexentry.
|
|
*
|
|
* Returns: TRUE if there was a value associated with the given
|
|
* format.
|
|
*/
|
|
gboolean
|
|
gst_index_entry_assoc_map (GstIndexEntry * entry,
|
|
GstFormat format, gint64 * value)
|
|
{
|
|
gint i;
|
|
|
|
g_return_val_if_fail (entry != NULL, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
for (i = 0; i < GST_INDEX_NASSOCS (entry); i++) {
|
|
if (GST_INDEX_ASSOC_FORMAT (entry, i) == format) {
|
|
*value = GST_INDEX_ASSOC_VALUE (entry, i);
|
|
return TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|