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416 lines
6.6 KiB
Text
416 lines
6.6 KiB
Text
<!-- ##### SECTION Title ##### -->
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GstIndex
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<!-- ##### SECTION Short_Description ##### -->
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Generate indexes on objects
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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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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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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#GstIndexFactory
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</para>
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<!-- ##### STRUCT GstIndexEntry ##### -->
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<para>
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The basic element of an index.
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</para>
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@type:
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@id:
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<!-- ##### STRUCT GstIndexGroup ##### -->
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<para>
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A group of related entries in an index.
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</para>
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@groupnum:
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@entries:
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@certainty:
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@peergroup:
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<!-- ##### ENUM GstIndexCertainty ##### -->
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<para>
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The certainty of a group in the index.
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</para>
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@GST_INDEX_UNKNOWN: accuracy is not known
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@GST_INDEX_CERTAIN: accuracy is perfect
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@GST_INDEX_FUZZY: accuracy is fuzzy
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<!-- ##### ENUM GstIndexEntryType ##### -->
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<para>
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The different types of entries in the index.
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</para>
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@GST_INDEX_ENTRY_ID: This entry is an id that maps an index id to its owner object
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@GST_INDEX_ENTRY_ASSOCIATION: This entry is an association between formats
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@GST_INDEX_ENTRY_OBJECT: An object
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@GST_INDEX_ENTRY_FORMAT: A format definition
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<!-- ##### ENUM GstIndexLookupMethod ##### -->
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<para>
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Specify the method to find an index entry in the index.
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</para>
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@GST_INDEX_LOOKUP_EXACT: There has to be an exact indexentry with the given format/value
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@GST_INDEX_LOOKUP_BEFORE: The exact entry or the one before it
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@GST_INDEX_LOOKUP_AFTER: The exact entry or the one after it
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<!-- ##### ENUM GstIndexFlags ##### -->
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<para>
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Flags for this index
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</para>
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@GST_INDEX_WRITABLE: The index is writable
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@GST_INDEX_READABLE: The index is readable
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@GST_INDEX_FLAG_LAST: First flag that can be used by subclasses
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<!-- ##### MACRO GST_INDEX_ID_INVALID ##### -->
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<para>
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An invalid index id
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</para>
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<!-- ##### MACRO GST_INDEX_IS_READABLE ##### -->
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<para>
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Check if the index can be read from
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</para>
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@obj: The index to check
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<!-- ##### MACRO GST_INDEX_IS_WRITABLE ##### -->
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<para>
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Check if the index can be written to
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</para>
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@obj: The index to check
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<!-- ##### MACRO GST_INDEX_NASSOCS ##### -->
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<para>
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Get the number of associations in the entry.
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</para>
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@entry: The entry to query
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<!-- ##### MACRO GST_INDEX_ASSOC_FLAGS ##### -->
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<para>
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Get the flags for this entry
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</para>
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@entry: The entry to query
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<!-- ##### MACRO GST_INDEX_ASSOC_FORMAT ##### -->
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<para>
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Get the i-th format of the entry.
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</para>
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@entry: The entry to query
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@i: The format index
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<!-- ##### MACRO GST_INDEX_ASSOC_VALUE ##### -->
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<para>
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Get the i-th value of the entry.
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</para>
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@entry: The entry to query
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@i: The value index
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<!-- ##### STRUCT GstIndexAssociation ##### -->
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<para>
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An association in an entry.
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</para>
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@format: the format of the association
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@value: the value of the association
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<!-- ##### ENUM GstAssocFlags ##### -->
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<para>
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flags for an association entry
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</para>
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@GST_ASSOCIATION_FLAG_NONE: no extra flags
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@GST_ASSOCIATION_FLAG_KEY_UNIT: the entry marks a key unit, a key unit is one
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that marks a place where one can randomly seek to.
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@GST_ASSOCIATION_FLAG_LAST: extra user defined flags should start here.
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<!-- ##### MACRO GST_INDEX_FORMAT_FORMAT ##### -->
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<para>
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Get the format of the format entry
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</para>
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@entry: The entry to query
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<!-- ##### MACRO GST_INDEX_FORMAT_KEY ##### -->
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<para>
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Get the key of the format entry
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</para>
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@entry: The entry to query
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<!-- ##### MACRO GST_INDEX_ID_DESCRIPTION ##### -->
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<para>
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Get the description of the id entry
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</para>
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@entry: The entry to query
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<!-- ##### USER_FUNCTION GstIndexFilter ##### -->
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<para>
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Function to filter out entries in the index.
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</para>
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@index: The index being queried
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@entry: The entry to be added.
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@Returns: This function should return TRUE if the entry is to be added
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to the index, FALSE otherwise.
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<!-- ##### USER_FUNCTION GstIndexResolver ##### -->
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<para>
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Function to resolve ids to writer descriptions.
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</para>
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@index: the index being queried.
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@writer: The object that wants to write
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@writer_string: A description of the writer.
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@user_data: user_data as registered
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@Returns: TRUE if an id could be assigned to the writer.
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<!-- # Unused Parameters # -->
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@writer_id: A pointer to the id that has to be assigned to this writer
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<!-- ##### ENUM GstIndexResolverMethod ##### -->
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<para>
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The method used to resolve index writers
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</para>
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@GST_INDEX_RESOLVER_CUSTOM: Use a custom resolver
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@GST_INDEX_RESOLVER_GTYPE: Resolve based on the GType of the object
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@GST_INDEX_RESOLVER_PATH: Resolve on the path in graph
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<!-- ##### STRUCT GstIndex ##### -->
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<para>
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The GstIndex object
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</para>
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<!-- ##### FUNCTION gst_index_new ##### -->
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<para>
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</para>
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@Returns:
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<!-- ##### FUNCTION gst_index_get_group ##### -->
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<para>
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</para>
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@index:
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@Returns:
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<!-- ##### FUNCTION gst_index_new_group ##### -->
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<para>
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</para>
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@index:
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@Returns:
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<!-- ##### FUNCTION gst_index_set_group ##### -->
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<para>
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</para>
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@index:
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@groupnum:
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@Returns:
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<!-- ##### FUNCTION gst_index_set_certainty ##### -->
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<para>
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</para>
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@index:
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@certainty:
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<!-- ##### FUNCTION gst_index_get_certainty ##### -->
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<para>
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</para>
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@index:
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@Returns:
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<!-- ##### FUNCTION gst_index_set_filter ##### -->
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<para>
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</para>
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@index:
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@filter:
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@user_data:
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<!-- ##### FUNCTION gst_index_set_resolver ##### -->
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<para>
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</para>
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@index:
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@resolver:
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@user_data:
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<!-- ##### FUNCTION gst_index_get_writer_id ##### -->
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<para>
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</para>
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@index:
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@writer:
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@id:
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@Returns:
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<!-- ##### FUNCTION gst_index_add_format ##### -->
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<para>
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</para>
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@index:
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@id:
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@format:
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@Returns:
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<!-- ##### FUNCTION gst_index_add_association ##### -->
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<para>
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</para>
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@index:
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@id:
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@flags:
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@format:
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@value:
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@Varargs:
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@Returns:
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<!-- ##### FUNCTION gst_index_add_object ##### -->
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<para>
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</para>
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@index:
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@id:
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@key:
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@type:
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@object:
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@Returns:
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<!-- ##### FUNCTION gst_index_add_id ##### -->
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<para>
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</para>
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@index:
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@id:
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@description:
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@Returns:
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<!-- ##### FUNCTION gst_index_get_assoc_entry ##### -->
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<para>
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</para>
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@index:
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@id:
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@method:
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@flags:
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@format:
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@value:
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@Returns:
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<!-- ##### FUNCTION gst_index_get_assoc_entry_full ##### -->
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<para>
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</para>
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@index:
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@id:
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@method:
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@flags:
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@format:
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@value:
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@func:
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@user_data:
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@Returns:
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<!-- ##### FUNCTION gst_index_entry_free ##### -->
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<para>
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</para>
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@entry:
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<!-- ##### FUNCTION gst_index_entry_assoc_map ##### -->
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<para>
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</para>
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@entry:
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@format:
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@value:
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@Returns:
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<!-- ##### FUNCTION gst_index_commit ##### -->
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<para>
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</para>
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@index:
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@id:
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<!-- ##### SIGNAL GstIndex::entry-added ##### -->
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<para>
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Is emited when a new entry is added to the index.
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</para>
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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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<!-- ##### ARG GstIndex:resolver ##### -->
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<para>
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</para>
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