gstreamer-rs/gir-files/GstTag-1.0.gir

<?xml version="1.0"?>
<!-- This file was automatically generated from C sources - DO NOT EDIT!
To affect the contents of this file, edit the original C definitions,
and/or use gtk-doc annotations.  -->
<repository xmlns="http://www.gtk.org/introspection/core/1.0" xmlns:c="http://www.gtk.org/introspection/c/1.0" xmlns:glib="http://www.gtk.org/introspection/glib/1.0" version="1.2">
  <include name="Gst" version="1.0"/>
  <include name="GstBase" version="1.0"/>
  <package name="gstreamer-tag-1.0"/>
  <c:include name="gst/tag/tag.h"/>
  <namespace name="GstTag" version="1.0" shared-library="libgsttag-1.0.so.0" c:identifier-prefixes="Gst" c:symbol-prefixes="gst">
    <function-macro name="IS_TAG_DEMUX" c:identifier="GST_IS_TAG_DEMUX" introspectable="0">
      
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_TAG_DEMUX_CLASS" c:identifier="GST_IS_TAG_DEMUX_CLASS" introspectable="0">
      
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_TAG_MUX" c:identifier="GST_IS_TAG_MUX" introspectable="0">
      
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_TAG_MUX_CLASS" c:identifier="GST_IS_TAG_MUX_CLASS" introspectable="0">
      
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_TAG_XMP_WRITER" c:identifier="GST_IS_TAG_XMP_WRITER" introspectable="0">
      
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <constant name="TAG_ACOUSTID_FINGERPRINT" value="chromaprint-fingerprint" c:type="GST_TAG_ACOUSTID_FINGERPRINT" version="1.18">
      <doc xml:space="preserve">AcoustID Fingerprint (Chromaprint)</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_ACOUSTID_ID" value="acoustid-id" c:type="GST_TAG_ACOUSTID_ID" version="1.18">
      <doc xml:space="preserve">AcoustID Identifier</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_CONTRAST" value="capturing-contrast" c:type="GST_TAG_CAPTURING_CONTRAST">
      <doc xml:space="preserve">Direction of contrast processing applied when capturing an image. (string)

The allowed values are:
 "normal"
 "soft"
 "hard"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_DIGITAL_ZOOM_RATIO" value="capturing-digital-zoom-ratio" c:type="GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO">
      <doc xml:space="preserve">Digital zoom ratio used when capturing an image. (double)</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_EXPOSURE_COMPENSATION" value="capturing-exposure-compensation" c:type="GST_TAG_CAPTURING_EXPOSURE_COMPENSATION">
      <doc xml:space="preserve">Exposure compensation using when capturing an image in EV. (double)</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_EXPOSURE_MODE" value="capturing-exposure-mode" c:type="GST_TAG_CAPTURING_EXPOSURE_MODE">
      <doc xml:space="preserve">Exposure mode used when capturing an image. (string)

The allowed values are:
  "auto-exposure"
  "manual-exposure"
  "auto-bracket"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_EXPOSURE_PROGRAM" value="capturing-exposure-program" c:type="GST_TAG_CAPTURING_EXPOSURE_PROGRAM">
      <doc xml:space="preserve">Type of exposure control used when capturing an image. (string)

The allowed values are:
  "undefined"
  "manual"
  "normal" - automatically controlled
  "aperture-priority" - user selects aperture value
  "shutter-priority" - user selects shutter speed
  "creative" - biased towards depth of field
  "action" - biased towards fast shutter speed
  "portrait" - closeup, leaving background out of focus
  "landscape" - landscape photos, background in focus</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_FLASH_FIRED" value="capturing-flash-fired" c:type="GST_TAG_CAPTURING_FLASH_FIRED">
      <doc xml:space="preserve">If flash was fired during the capture of an image. (boolean)

Note that if this tag isn't present, it should not be assumed that
the flash did not fire. It should be treated as unknown.</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_FLASH_MODE" value="capturing-flash-mode" c:type="GST_TAG_CAPTURING_FLASH_MODE">
      <doc xml:space="preserve">The flash mode selected during the capture of an image. (string)

The allowed values are:
 "auto"
 "always"
 "never"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_FOCAL_LENGTH" value="capturing-focal-length" c:type="GST_TAG_CAPTURING_FOCAL_LENGTH">
      <doc xml:space="preserve">Focal length used when capturing an image, in mm. (double)</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_FOCAL_LENGTH_35_MM" value="capturing-focal-length-35mm" c:type="GST_TAG_CAPTURING_FOCAL_LENGTH_35_MM" version="1.10">
      <doc xml:space="preserve">35 mm equivalent focal length used when capturing an image, in mm. (double)</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_FOCAL_RATIO" value="capturing-focal-ratio" c:type="GST_TAG_CAPTURING_FOCAL_RATIO">
      <doc xml:space="preserve">Focal ratio (f-number) used when capturing an image. (double)

The value stored is the denominator of the focal ratio (f-number).
For example, if this tag value is 2, the focal ratio is f/2.</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_GAIN_ADJUSTMENT" value="capturing-gain-adjustment" c:type="GST_TAG_CAPTURING_GAIN_ADJUSTMENT">
      <doc xml:space="preserve">Gain adjustment applied to an image. (string)

The allowed values are:
  "none"
  "low-gain-up"
  "high-gain-up"
  "low-gain-down"
  "high-gain-down"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_ISO_SPEED" value="capturing-iso-speed" c:type="GST_TAG_CAPTURING_ISO_SPEED">
      <doc xml:space="preserve">ISO speed used when capturing an image. (integer)</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_METERING_MODE" value="capturing-metering-mode" c:type="GST_TAG_CAPTURING_METERING_MODE">
      <doc xml:space="preserve">Defines the way a camera determines the exposure. (string)

The allowed values are:
  "unknown"
  "average"
  "center-weighted-average"
  "spot"
  "multi-spot"
  "pattern"
  "partial"
  "other"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_SATURATION" value="capturing-saturation" c:type="GST_TAG_CAPTURING_SATURATION">
      <doc xml:space="preserve">Direction of saturation processing applied when capturing an image. (string)

The allowed values are:
 "normal"
 "low-saturation"
 "high-saturation"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_SCENE_CAPTURE_TYPE" value="capturing-scene-capture-type" c:type="GST_TAG_CAPTURING_SCENE_CAPTURE_TYPE">
      <doc xml:space="preserve">Scene mode used when capturing an image. (string)

The allowed values are:
  "standard"
  "landscape"
  "portrait"
  "night-scene"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_SHARPNESS" value="capturing-sharpness" c:type="GST_TAG_CAPTURING_SHARPNESS">
      <doc xml:space="preserve">Direction of sharpness processing applied when capturing an image. (string)

The allowed values are:
 "normal"
 "soft"
 "hard"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_SHUTTER_SPEED" value="capturing-shutter-speed" c:type="GST_TAG_CAPTURING_SHUTTER_SPEED">
      <doc xml:space="preserve">Shutter speed used when capturing an image, in seconds. (fraction)</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_SOURCE" value="capturing-source" c:type="GST_TAG_CAPTURING_SOURCE">
      <doc xml:space="preserve">Indicates the source of capture. The device/medium used to do the
capture. (string)

Allowed values are:
  "dsc" (= digital still camera)
  "transparent-scanner"
  "reflex-scanner"
  "other"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CAPTURING_WHITE_BALANCE" value="capturing-white-balance" c:type="GST_TAG_CAPTURING_WHITE_BALANCE">
      <doc xml:space="preserve">White balance mode used when capturing an image. (string)

The allowed values are:
  "auto"
  "manual"
  "daylight"
  "cloudy"
  "tungsten"
  "fluorescent"
  "fluorescent h" (newer daylight-calibrated fluorescents)
  "flash"</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CDDA_CDDB_DISCID" value="discid" c:type="GST_TAG_CDDA_CDDB_DISCID">
      <doc xml:space="preserve">CDDB disc id in its short form (e.g. 'aa063d0f')</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CDDA_CDDB_DISCID_FULL" value="discid-full" c:type="GST_TAG_CDDA_CDDB_DISCID_FULL">
      <doc xml:space="preserve">CDDB disc id including all details</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CDDA_MUSICBRAINZ_DISCID" value="musicbrainz-discid" c:type="GST_TAG_CDDA_MUSICBRAINZ_DISCID">
      <doc xml:space="preserve">Musicbrainz disc id (e.g. 'ahg7JUcfR3vCYBphSDIogOOWrr0-')</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CDDA_MUSICBRAINZ_DISCID_FULL" value="musicbrainz-discid-full" c:type="GST_TAG_CDDA_MUSICBRAINZ_DISCID_FULL">
      <doc xml:space="preserve">Musicbrainz disc id details</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CMML_CLIP" value="cmml-clip" c:type="GST_TAG_CMML_CLIP">
      <doc xml:space="preserve">Annodex CMML clip element tag</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CMML_HEAD" value="cmml-head" c:type="GST_TAG_CMML_HEAD">
      <doc xml:space="preserve">Annodex CMML head element tag</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_CMML_STREAM" value="cmml-stream" c:type="GST_TAG_CMML_STREAM">
      <doc xml:space="preserve">Annodex CMML stream element tag</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <function-macro name="TAG_DEMUX" c:identifier="GST_TAG_DEMUX" introspectable="0">
      
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="TAG_DEMUX_CLASS" c:identifier="GST_TAG_DEMUX_CLASS" introspectable="0">
      
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <constant name="TAG_ID3V2_HEADER_SIZE" value="10" c:type="GST_TAG_ID3V2_HEADER_SIZE">
      <doc xml:space="preserve">ID3V2 header size considered minimum input for some functions such as
gst_tag_list_from_id3v2_tag() and gst_tag_get_id3v2_tag_size() for example.</doc>
      
      <type name="gint" c:type="gint"/>
    </constant>
    <constant name="TAG_IMAGE_HORIZONTAL_PPI" value="image-horizontal-ppi" c:type="GST_TAG_IMAGE_HORIZONTAL_PPI">
      <doc xml:space="preserve">Media (image/video) intended horizontal pixel density in ppi. (double)</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_IMAGE_VERTICAL_PPI" value="image-vertical-ppi" c:type="GST_TAG_IMAGE_VERTICAL_PPI">
      <doc xml:space="preserve">Media (image/video) intended vertical pixel density in ppi. (double)</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_MUSICAL_KEY" value="musical-key" c:type="GST_TAG_MUSICAL_KEY" version="1.2">
      <doc xml:space="preserve">Musical key in which the sound starts. It is represented as a string
with a maximum length of three characters. The ground keys are
represented with "A","B","C","D","E", "F" and "G" and halfkeys
represented with "b" and "#". Minor is represented as "m" (e.g. "Dbm").
Off key is represented with an "o" only.
This notation might be extended in the future to support non-minor/major
keys.</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_MUSICBRAINZ_ALBUMARTISTID" value="musicbrainz-albumartistid" c:type="GST_TAG_MUSICBRAINZ_ALBUMARTISTID">
      <doc xml:space="preserve">MusicBrainz album artist ID</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_MUSICBRAINZ_ALBUMID" value="musicbrainz-albumid" c:type="GST_TAG_MUSICBRAINZ_ALBUMID">
      <doc xml:space="preserve">MusicBrainz album ID</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_MUSICBRAINZ_ARTISTID" value="musicbrainz-artistid" c:type="GST_TAG_MUSICBRAINZ_ARTISTID">
      <doc xml:space="preserve">MusicBrainz artist ID</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_MUSICBRAINZ_RELEASEGROUPID" value="musicbrainz-releasegroupid" c:type="GST_TAG_MUSICBRAINZ_RELEASEGROUPID" version="1.18">
      <doc xml:space="preserve">MusicBrainz Release Group ID</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_MUSICBRAINZ_RELEASETRACKID" value="musicbrainz-releasetrackid" c:type="GST_TAG_MUSICBRAINZ_RELEASETRACKID" version="1.18">
      <doc xml:space="preserve">MusicBrainz Release Track ID</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_MUSICBRAINZ_TRACKID" value="musicbrainz-trackid" c:type="GST_TAG_MUSICBRAINZ_TRACKID">
      <doc xml:space="preserve">MusicBrainz track ID</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <constant name="TAG_MUSICBRAINZ_TRMID" value="musicbrainz-trmid" c:type="GST_TAG_MUSICBRAINZ_TRMID">
      <doc xml:space="preserve">MusicBrainz track TRM ID</doc>
      
      <type name="utf8" c:type="gchar*"/>
    </constant>
    <function-macro name="TAG_MUX" c:identifier="GST_TAG_MUX" introspectable="0">
      
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="TAG_MUX_CLASS" c:identifier="GST_TAG_MUX_CLASS" introspectable="0">
      
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="TAG_XMP_WRITER" c:identifier="GST_TAG_XMP_WRITER" introspectable="0">
      
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="TAG_XMP_WRITER_GET_INTERFACE" c:identifier="GST_TAG_XMP_WRITER_GET_INTERFACE" introspectable="0">
      
      <parameters>
        <parameter name="inst">
        </parameter>
      </parameters>
    </function-macro>
    <class name="TagDemux" c:symbol-prefix="tag_demux" c:type="GstTagDemux" parent="Gst.Element" abstract="1" glib:type-name="GstTagDemux" glib:get-type="gst_tag_demux_get_type" glib:type-struct="TagDemuxClass">
      <doc xml:space="preserve">Provides a base class for demuxing tags at the beginning or end of a
stream and handles things like typefinding, querying, seeking, and
different modes of operation (chain-based, pull_range-based, and providing
downstream elements with random access if upstream supports that). The tag
is stripped from the output, and all offsets are adjusted for the tag
sizes, so that to the downstream element the stream will appear as if
there was no tag at all. Also, once the tag has been parsed, GstTagDemux
will try to determine the media type of the resulting stream and add a
source pad with the appropriate caps in order to facilitate auto-plugging.

## Deriving from GstTagDemux

Subclasses have to do four things:

 * In their base init function, they must add a pad template for the sink
   pad to the element class, describing the media type they can parse in
   the caps of the pad template.
 * In their class init function, they must override
   GST_TAG_DEMUX_CLASS(demux_klass)-&gt;identify_tag with their own identify
   function.
 * In their class init function, they must override
 GST_TAG_DEMUX_CLASS(demux_klass)-&gt;parse_tag with their own parse
 function.
 * In their class init function, they must also set
   GST_TAG_DEMUX_CLASS(demux_klass)-&gt;min_start_size and/or
 GST_TAG_DEMUX_CLASS(demux_klass)-&gt;min_end_size to the minimum size required
 for the identify function to decide whether the stream has a supported tag
 or not. A class parsing ID3v1 tags, for example, would set min_end_size to
 128 bytes.</doc>
      
      <virtual-method name="identify_tag">
        
        <return-value transfer-ownership="none">
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <instance-parameter name="demux" transfer-ownership="none">
            <type name="TagDemux" c:type="GstTagDemux*"/>
          </instance-parameter>
          <parameter name="buffer" transfer-ownership="none">
            <type name="Gst.Buffer" c:type="GstBuffer*"/>
          </parameter>
          <parameter name="start_tag" transfer-ownership="none">
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
          <parameter name="tag_size" transfer-ownership="none">
            <type name="guint" c:type="guint*"/>
          </parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="merge_tags">
        
        <return-value transfer-ownership="full">
          <type name="Gst.TagList" c:type="GstTagList*"/>
        </return-value>
        <parameters>
          <instance-parameter name="demux" transfer-ownership="none">
            <type name="TagDemux" c:type="GstTagDemux*"/>
          </instance-parameter>
          <parameter name="start_tags" transfer-ownership="none">
            <type name="Gst.TagList" c:type="const GstTagList*"/>
          </parameter>
          <parameter name="end_tags" transfer-ownership="none">
            <type name="Gst.TagList" c:type="const GstTagList*"/>
          </parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="parse_tag">
        
        <return-value transfer-ownership="none">
          <type name="TagDemuxResult" c:type="GstTagDemuxResult"/>
        </return-value>
        <parameters>
          <instance-parameter name="demux" transfer-ownership="none">
            <type name="TagDemux" c:type="GstTagDemux*"/>
          </instance-parameter>
          <parameter name="buffer" transfer-ownership="none">
            <type name="Gst.Buffer" c:type="GstBuffer*"/>
          </parameter>
          <parameter name="start_tag" transfer-ownership="none">
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
          <parameter name="tag_size" transfer-ownership="none">
            <type name="guint" c:type="guint*"/>
          </parameter>
          <parameter name="tags" transfer-ownership="none">
            <type name="Gst.TagList" c:type="GstTagList**"/>
          </parameter>
        </parameters>
      </virtual-method>
      <field name="element">
        <doc xml:space="preserve">parent element</doc>
        <type name="Gst.Element" c:type="GstElement"/>
      </field>
      <field name="priv" readable="0" private="1">
        <type name="TagDemuxPrivate" c:type="GstTagDemuxPrivate*"/>
      </field>
      <field name="reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="4">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </class>
    <record name="TagDemuxClass" c:type="GstTagDemuxClass" glib:is-gtype-struct-for="TagDemux">
      <doc xml:space="preserve">The #GstTagDemuxClass structure.  See documentation at beginning of section
for details about what subclasses need to override and do.</doc>
      
      <field name="parent_class">
        <doc xml:space="preserve">the parent class.</doc>
        <type name="Gst.ElementClass" c:type="GstElementClass"/>
      </field>
      <field name="min_start_size">
        <doc xml:space="preserve">minimum size required to identify a tag at the start and
determine its total size. Set to 0 if not interested in start tags.
Subclasses should set this in their class_init function.</doc>
        <type name="guint" c:type="guint"/>
      </field>
      <field name="min_end_size">
        <doc xml:space="preserve">minimum size required to identify a tag at the end and
determine its total size. Set to 0 if not interested in end tags.
Subclasses should set this in their class_init function.</doc>
        <type name="guint" c:type="guint"/>
      </field>
      <field name="identify_tag">
        <callback name="identify_tag">
          
          <return-value transfer-ownership="none">
            <type name="gboolean" c:type="gboolean"/>
          </return-value>
          <parameters>
            <parameter name="demux" transfer-ownership="none">
              <type name="TagDemux" c:type="GstTagDemux*"/>
            </parameter>
            <parameter name="buffer" transfer-ownership="none">
              <type name="Gst.Buffer" c:type="GstBuffer*"/>
            </parameter>
            <parameter name="start_tag" transfer-ownership="none">
              <type name="gboolean" c:type="gboolean"/>
            </parameter>
            <parameter name="tag_size" transfer-ownership="none">
              <type name="guint" c:type="guint*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="parse_tag">
        <callback name="parse_tag">
          
          <return-value transfer-ownership="none">
            <type name="TagDemuxResult" c:type="GstTagDemuxResult"/>
          </return-value>
          <parameters>
            <parameter name="demux" transfer-ownership="none">
              <type name="TagDemux" c:type="GstTagDemux*"/>
            </parameter>
            <parameter name="buffer" transfer-ownership="none">
              <type name="Gst.Buffer" c:type="GstBuffer*"/>
            </parameter>
            <parameter name="start_tag" transfer-ownership="none">
              <type name="gboolean" c:type="gboolean"/>
            </parameter>
            <parameter name="tag_size" transfer-ownership="none">
              <type name="guint" c:type="guint*"/>
            </parameter>
            <parameter name="tags" transfer-ownership="none">
              <type name="Gst.TagList" c:type="GstTagList**"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="merge_tags">
        <callback name="merge_tags">
          
          <return-value transfer-ownership="full">
            <type name="Gst.TagList" c:type="GstTagList*"/>
          </return-value>
          <parameters>
            <parameter name="demux" transfer-ownership="none">
              <type name="TagDemux" c:type="GstTagDemux*"/>
            </parameter>
            <parameter name="start_tags" transfer-ownership="none">
              <type name="Gst.TagList" c:type="const GstTagList*"/>
            </parameter>
            <parameter name="end_tags" transfer-ownership="none">
              <type name="Gst.TagList" c:type="const GstTagList*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="4">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </record>
    <record name="TagDemuxPrivate" c:type="GstTagDemuxPrivate" disguised="1">
      
    </record>
    <enumeration name="TagDemuxResult" glib:type-name="GstTagDemuxResult" glib:get-type="gst_tag_demux_result_get_type" c:type="GstTagDemuxResult">
      <doc xml:space="preserve">Result values from the parse_tag virtual function.</doc>
      <member name="broken_tag" value="0" c:identifier="GST_TAG_DEMUX_RESULT_BROKEN_TAG" glib:nick="broken-tag">
        <doc xml:space="preserve">cannot parse tag, just skip it</doc>
      </member>
      <member name="again" value="1" c:identifier="GST_TAG_DEMUX_RESULT_AGAIN" glib:nick="again">
        <doc xml:space="preserve">call again with less or more data</doc>
      </member>
      <member name="ok" value="2" c:identifier="GST_TAG_DEMUX_RESULT_OK" glib:nick="ok">
        <doc xml:space="preserve">parsed tag successfully</doc>
      </member>
    </enumeration>
    <enumeration name="TagImageType" glib:type-name="GstTagImageType" glib:get-type="gst_tag_image_type_get_type" c:type="GstTagImageType">
      <doc xml:space="preserve">Type of image contained in an image tag (specified as "image-type" field in
the info structure in the image's #GstSample)</doc>
      <member name="none" value="-1" c:identifier="GST_TAG_IMAGE_TYPE_NONE" glib:nick="none">
        <doc xml:space="preserve">No image type. Can be used to
     tell functions such as gst_tag_image_data_to_image_sample() that no
     image type should be set.</doc>
      </member>
      <member name="undefined" value="0" c:identifier="GST_TAG_IMAGE_TYPE_UNDEFINED" glib:nick="undefined">
        <doc xml:space="preserve">Undefined/other image type</doc>
      </member>
      <member name="front_cover" value="1" c:identifier="GST_TAG_IMAGE_TYPE_FRONT_COVER" glib:nick="front-cover">
        <doc xml:space="preserve">Cover (front)</doc>
      </member>
      <member name="back_cover" value="2" c:identifier="GST_TAG_IMAGE_TYPE_BACK_COVER" glib:nick="back-cover">
        <doc xml:space="preserve">Cover (back)</doc>
      </member>
      <member name="leaflet_page" value="3" c:identifier="GST_TAG_IMAGE_TYPE_LEAFLET_PAGE" glib:nick="leaflet-page">
        <doc xml:space="preserve">Leaflet page</doc>
      </member>
      <member name="medium" value="4" c:identifier="GST_TAG_IMAGE_TYPE_MEDIUM" glib:nick="medium">
        <doc xml:space="preserve">Medium (e.g. label side of CD)</doc>
      </member>
      <member name="lead_artist" value="5" c:identifier="GST_TAG_IMAGE_TYPE_LEAD_ARTIST" glib:nick="lead-artist">
        <doc xml:space="preserve">Lead artist/lead performer/soloist</doc>
      </member>
      <member name="artist" value="6" c:identifier="GST_TAG_IMAGE_TYPE_ARTIST" glib:nick="artist">
        <doc xml:space="preserve">Artist/performer</doc>
      </member>
      <member name="conductor" value="7" c:identifier="GST_TAG_IMAGE_TYPE_CONDUCTOR" glib:nick="conductor">
        <doc xml:space="preserve">Conductor</doc>
      </member>
      <member name="band_orchestra" value="8" c:identifier="GST_TAG_IMAGE_TYPE_BAND_ORCHESTRA" glib:nick="band-orchestra">
        <doc xml:space="preserve">Band/orchestra</doc>
      </member>
      <member name="composer" value="9" c:identifier="GST_TAG_IMAGE_TYPE_COMPOSER" glib:nick="composer">
        <doc xml:space="preserve">Composer</doc>
      </member>
      <member name="lyricist" value="10" c:identifier="GST_TAG_IMAGE_TYPE_LYRICIST" glib:nick="lyricist">
        <doc xml:space="preserve">Lyricist/text writer</doc>
      </member>
      <member name="recording_location" value="11" c:identifier="GST_TAG_IMAGE_TYPE_RECORDING_LOCATION" glib:nick="recording-location">
        <doc xml:space="preserve">Recording location</doc>
      </member>
      <member name="during_recording" value="12" c:identifier="GST_TAG_IMAGE_TYPE_DURING_RECORDING" glib:nick="during-recording">
        <doc xml:space="preserve">During recording</doc>
      </member>
      <member name="during_performance" value="13" c:identifier="GST_TAG_IMAGE_TYPE_DURING_PERFORMANCE" glib:nick="during-performance">
        <doc xml:space="preserve">During performance</doc>
      </member>
      <member name="video_capture" value="14" c:identifier="GST_TAG_IMAGE_TYPE_VIDEO_CAPTURE" glib:nick="video-capture">
        <doc xml:space="preserve">Movie/video screen capture</doc>
      </member>
      <member name="fish" value="15" c:identifier="GST_TAG_IMAGE_TYPE_FISH" glib:nick="fish">
        <doc xml:space="preserve">A fish as funny as the ID3v2 spec</doc>
      </member>
      <member name="illustration" value="16" c:identifier="GST_TAG_IMAGE_TYPE_ILLUSTRATION" glib:nick="illustration">
        <doc xml:space="preserve">Illustration</doc>
      </member>
      <member name="band_artist_logo" value="17" c:identifier="GST_TAG_IMAGE_TYPE_BAND_ARTIST_LOGO" glib:nick="band-artist-logo">
        <doc xml:space="preserve">Band/artist logotype</doc>
      </member>
      <member name="publisher_studio_logo" value="18" c:identifier="GST_TAG_IMAGE_TYPE_PUBLISHER_STUDIO_LOGO" glib:nick="publisher-studio-logo">
        <doc xml:space="preserve">Publisher/studio logotype</doc>
      </member>
    </enumeration>
    <bitfield name="TagLicenseFlags" glib:type-name="GstTagLicenseFlags" glib:get-type="gst_tag_license_flags_get_type" c:type="GstTagLicenseFlags">
      <doc xml:space="preserve">See http://creativecommons.org/ns for more information.</doc>
      <member name="permits_reproduction" value="1" c:identifier="GST_TAG_LICENSE_PERMITS_REPRODUCTION" glib:nick="permits-reproduction">
        <doc xml:space="preserve">making multiple copies
    is allowed</doc>
      </member>
      <member name="permits_distribution" value="2" c:identifier="GST_TAG_LICENSE_PERMITS_DISTRIBUTION" glib:nick="permits-distribution">
        <doc xml:space="preserve">distribution, public display
    and public performance are allowed</doc>
      </member>
      <member name="permits_derivative_works" value="4" c:identifier="GST_TAG_LICENSE_PERMITS_DERIVATIVE_WORKS" glib:nick="permits-derivative-works">
        <doc xml:space="preserve">distribution of derivative
    works is allowed</doc>
      </member>
      <member name="permits_sharing" value="8" c:identifier="GST_TAG_LICENSE_PERMITS_SHARING" glib:nick="permits-sharing">
        <doc xml:space="preserve">commercial derivatives are allowed,
    but only non-commercial distribution is allowed</doc>
      </member>
      <member name="requires_notice" value="256" c:identifier="GST_TAG_LICENSE_REQUIRES_NOTICE" glib:nick="requires-notice">
        <doc xml:space="preserve">copyright and license notices
    must be kept intact</doc>
      </member>
      <member name="requires_attribution" value="512" c:identifier="GST_TAG_LICENSE_REQUIRES_ATTRIBUTION" glib:nick="requires-attribution">
        <doc xml:space="preserve">credit must be given to
    copyright holder and/or author</doc>
      </member>
      <member name="requires_share_alike" value="1024" c:identifier="GST_TAG_LICENSE_REQUIRES_SHARE_ALIKE" glib:nick="requires-share-alike">
        <doc xml:space="preserve">derivative works must be
    licensed under the same terms or compatible terms as the original work</doc>
      </member>
      <member name="requires_source_code" value="2048" c:identifier="GST_TAG_LICENSE_REQUIRES_SOURCE_CODE" glib:nick="requires-source-code">
        <doc xml:space="preserve">source code (the preferred
    form for making modifications) must be provided when exercising some
    rights granted by the license</doc>
      </member>
      <member name="requires_copyleft" value="4096" c:identifier="GST_TAG_LICENSE_REQUIRES_COPYLEFT" glib:nick="requires-copyleft">
        <doc xml:space="preserve">derivative and combined works
    must be licensed under specified terms, similar to those of the original
    work</doc>
      </member>
      <member name="requires_lesser_copyleft" value="8192" c:identifier="GST_TAG_LICENSE_REQUIRES_LESSER_COPYLEFT" glib:nick="requires-lesser-copyleft">
        <doc xml:space="preserve">derivative works must be
    licensed under specified terms, with at least the same conditions as
    the original work; combinations with the work may be licensed under
    different terms</doc>
      </member>
      <member name="prohibits_commercial_use" value="65536" c:identifier="GST_TAG_LICENSE_PROHIBITS_COMMERCIAL_USE" glib:nick="prohibits-commercial-use">
        <doc xml:space="preserve">exercising rights for
    commercial purposes is prohibited</doc>
      </member>
      <member name="prohibits_high_income_nation_use" value="131072" c:identifier="GST_TAG_LICENSE_PROHIBITS_HIGH_INCOME_NATION_USE" glib:nick="prohibits-high-income-nation-use">
        <doc xml:space="preserve">use in a
    non-developing country is prohibited</doc>
      </member>
      <member name="creative_commons_license" value="16777216" c:identifier="GST_TAG_LICENSE_CREATIVE_COMMONS_LICENSE" glib:nick="creative-commons-license">
        <doc xml:space="preserve">this license was created
    by the Creative Commons project</doc>
      </member>
      <member name="free_software_foundation_license" value="33554432" c:identifier="GST_TAG_LICENSE_FREE_SOFTWARE_FOUNDATION_LICENSE" glib:nick="free-software-foundation-license">
        <doc xml:space="preserve">this license was
    created by the Free Software Foundation (FSF)</doc>
      </member>
    </bitfield>
    <class name="TagMux" c:symbol-prefix="tag_mux" c:type="GstTagMux" parent="Gst.Element" abstract="1" glib:type-name="GstTagMux" glib:get-type="gst_tag_mux_get_type" glib:type-struct="TagMuxClass">
      <doc xml:space="preserve">Provides a base class for adding tags at the beginning or end of a
stream.

## Deriving from GstTagMux

Subclasses have to do the following things:

 * In their base init function, they must add pad templates for the sink
   pad and the source pad to the element class, describing the media type
   they accept and output in the caps of the pad template.
 * In their class init function, they must override the
   GST_TAG_MUX_CLASS(mux_klass)-&gt;render_start_tag and/or
   GST_TAG_MUX_CLASS(mux_klass)-&gt;render_end_tag vfuncs and set up a render
   function.</doc>
      
      <implements name="Gst.TagSetter"/>
      <virtual-method name="render_end_tag">
        
        <return-value transfer-ownership="full">
          <type name="Gst.Buffer" c:type="GstBuffer*"/>
        </return-value>
        <parameters>
          <instance-parameter name="mux" transfer-ownership="none">
            <type name="TagMux" c:type="GstTagMux*"/>
          </instance-parameter>
          <parameter name="tag_list" transfer-ownership="none">
            <type name="Gst.TagList" c:type="const GstTagList*"/>
          </parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="render_start_tag">
        
        <return-value transfer-ownership="full">
          <type name="Gst.Buffer" c:type="GstBuffer*"/>
        </return-value>
        <parameters>
          <instance-parameter name="mux" transfer-ownership="none">
            <type name="TagMux" c:type="GstTagMux*"/>
          </instance-parameter>
          <parameter name="tag_list" transfer-ownership="none">
            <type name="Gst.TagList" c:type="const GstTagList*"/>
          </parameter>
        </parameters>
      </virtual-method>
      <field name="element">
        <doc xml:space="preserve">parent element</doc>
        <type name="Gst.Element" c:type="GstElement"/>
      </field>
      <field name="priv" readable="0" private="1">
        <type name="TagMuxPrivate" c:type="GstTagMuxPrivate*"/>
      </field>
      <field name="_gst_reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="4">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </class>
    <record name="TagMuxClass" c:type="GstTagMuxClass" glib:is-gtype-struct-for="TagMux">
      <doc xml:space="preserve">The #GstTagMuxClass structure. Subclasses need to override at least one
of the two render vfuncs.</doc>
      
      <field name="parent_class">
        <doc xml:space="preserve">the parent class.</doc>
        <type name="Gst.ElementClass" c:type="GstElementClass"/>
      </field>
      <field name="render_start_tag">
        <callback name="render_start_tag">
          
          <return-value transfer-ownership="full">
            <type name="Gst.Buffer" c:type="GstBuffer*"/>
          </return-value>
          <parameters>
            <parameter name="mux" transfer-ownership="none">
              <type name="TagMux" c:type="GstTagMux*"/>
            </parameter>
            <parameter name="tag_list" transfer-ownership="none">
              <type name="Gst.TagList" c:type="const GstTagList*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="render_end_tag">
        <callback name="render_end_tag">
          
          <return-value transfer-ownership="full">
            <type name="Gst.Buffer" c:type="GstBuffer*"/>
          </return-value>
          <parameters>
            <parameter name="mux" transfer-ownership="none">
              <type name="TagMux" c:type="GstTagMux*"/>
            </parameter>
            <parameter name="tag_list" transfer-ownership="none">
              <type name="Gst.TagList" c:type="const GstTagList*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="_gst_reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="4">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </record>
    <record name="TagMuxPrivate" c:type="GstTagMuxPrivate" disguised="1">
      
    </record>
    <interface name="TagXmpWriter" c:symbol-prefix="tag_xmp_writer" c:type="GstTagXmpWriter" glib:type-name="GstTagXmpWriter" glib:get-type="gst_tag_xmp_writer_get_type" glib:type-struct="TagXmpWriterInterface">
      <doc xml:space="preserve">This interface is implemented by elements that are able to do XMP serialization. Examples for
such elements are #jifmux and #qtmux.

Applications can use this interface to configure which XMP schemas should be used when serializing
tags into XMP. Schemas are represented by their names, a full list of the supported schemas can be
obtained from gst_tag_xmp_list_schemas(). By default, all schemas are used.</doc>
      
      <prerequisite name="Gst.Element"/>
      <method name="add_all_schemas" c:identifier="gst_tag_xmp_writer_add_all_schemas">
        <doc xml:space="preserve">Adds all available XMP schemas to the configuration. Meaning that
all will be used.</doc>
        
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="config" transfer-ownership="none">
            <doc xml:space="preserve">a #GstTagXmpWriter</doc>
            <type name="TagXmpWriter" c:type="GstTagXmpWriter*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="add_schema" c:identifier="gst_tag_xmp_writer_add_schema">
        <doc xml:space="preserve">Adds @schema to the list schemas</doc>
        
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="config" transfer-ownership="none">
            <doc xml:space="preserve">a #GstTagXmpWriter</doc>
            <type name="TagXmpWriter" c:type="GstTagXmpWriter*"/>
          </instance-parameter>
          <parameter name="schema" transfer-ownership="none">
            <doc xml:space="preserve">the schema to be added</doc>
            <type name="utf8" c:type="const gchar*"/>
          </parameter>
        </parameters>
      </method>
      <method name="has_schema" c:identifier="gst_tag_xmp_writer_has_schema">
        <doc xml:space="preserve">Checks if @schema is going to be used</doc>
        
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">%TRUE if it is going to be used</doc>
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <instance-parameter name="config" transfer-ownership="none">
            <doc xml:space="preserve">a #GstTagXmpWriter</doc>
            <type name="TagXmpWriter" c:type="GstTagXmpWriter*"/>
          </instance-parameter>
          <parameter name="schema" transfer-ownership="none">
            <doc xml:space="preserve">the schema to test</doc>
            <type name="utf8" c:type="const gchar*"/>
          </parameter>
        </parameters>
      </method>
      <method name="remove_all_schemas" c:identifier="gst_tag_xmp_writer_remove_all_schemas">
        <doc xml:space="preserve">Removes all schemas from the list of schemas to use. Meaning that no
XMP will be generated.</doc>
        
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="config" transfer-ownership="none">
            <doc xml:space="preserve">a #GstTagXmpWriter</doc>
            <type name="TagXmpWriter" c:type="GstTagXmpWriter*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="remove_schema" c:identifier="gst_tag_xmp_writer_remove_schema">
        <doc xml:space="preserve">Removes a schema from the list of schemas to use. Nothing is done if
the schema wasn't in the list</doc>
        
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="config" transfer-ownership="none">
            <doc xml:space="preserve">a #GstTagXmpWriter</doc>
            <type name="TagXmpWriter" c:type="GstTagXmpWriter*"/>
          </instance-parameter>
          <parameter name="schema" transfer-ownership="none">
            <doc xml:space="preserve">the schema to remove</doc>
            <type name="utf8" c:type="const gchar*"/>
          </parameter>
        </parameters>
      </method>
      <method name="tag_list_to_xmp_buffer" c:identifier="gst_tag_xmp_writer_tag_list_to_xmp_buffer">
        
        <return-value transfer-ownership="full">
          <type name="Gst.Buffer" c:type="GstBuffer*"/>
        </return-value>
        <parameters>
          <instance-parameter name="config" transfer-ownership="none">
            <type name="TagXmpWriter" c:type="GstTagXmpWriter*"/>
          </instance-parameter>
          <parameter name="taglist" transfer-ownership="none">
            <type name="Gst.TagList" c:type="const GstTagList*"/>
          </parameter>
          <parameter name="read_only" transfer-ownership="none">
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
        </parameters>
      </method>
    </interface>
    <record name="TagXmpWriterInterface" c:type="GstTagXmpWriterInterface" glib:is-gtype-struct-for="TagXmpWriter">
      
      <field name="parent">
        <type name="GObject.TypeInterface" c:type="GTypeInterface"/>
      </field>
    </record>
    <function name="tag_check_language_code" c:identifier="gst_tag_check_language_code">
      <doc xml:space="preserve">Check if a given string contains a known ISO 639 language code.

This is useful in situations where it's not clear whether a given
string is a language code (which should be put into a #GST_TAG_LANGUAGE_CODE
tag) or a free-form language name descriptor (which should be put into a
#GST_TAG_LANGUAGE_NAME tag instead).</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">TRUE if the two- or three-letter language code in @lang_code
    is a valid ISO-639 language code.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </return-value>
      <parameters>
        <parameter name="lang_code" transfer-ownership="none">
          <doc xml:space="preserve">ISO-639 language code (e.g. "deu" or "ger" or "de")</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_freeform_string_to_utf8" c:identifier="gst_tag_freeform_string_to_utf8">
      <doc xml:space="preserve">Convenience function to read a string with unknown character encoding. If
the string is already in UTF-8 encoding, it will be returned right away.
If not it tries to detect byte-order-mark for UTF-16/32 cases and use that.
Otherwise, the environment will be searched for a number of environment
variables (whose names are specified in the NULL-terminated string array
@env_vars) containing a list of character encodings to try/use. If none
are specified, the current locale will be tried. If that also doesn't work,
WINDOWS-1252/ISO-8859-1 is assumed (which will almost always succeed).</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">a newly-allocated string in UTF-8 encoding, or NULL</doc>
        <type name="utf8" c:type="gchar*"/>
      </return-value>
      <parameters>
        <parameter name="data" transfer-ownership="none">
          <doc xml:space="preserve">string data</doc>
          <array length="1" zero-terminated="0" c:type="const gchar*">
            <type name="gchar"/>
          </array>
        </parameter>
        <parameter name="size" transfer-ownership="none">
          <doc xml:space="preserve">length of string data, or -1 if the string is NUL-terminated</doc>
          <type name="gint" c:type="gint"/>
        </parameter>
        <parameter name="env_vars" transfer-ownership="none">
          <doc xml:space="preserve">
   a NULL-terminated string array of environment variable names, or NULL</doc>
          <array c:type="const gchar**">
            <type name="utf8" c:type="gchar*"/>
          </array>
        </parameter>
      </parameters>
    </function>
    <function name="tag_from_id3_tag" c:identifier="gst_tag_from_id3_tag">
      <doc xml:space="preserve">Looks up the GStreamer tag for a ID3v2 tag.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">The corresponding GStreamer tag or NULL if none exists.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="id3_tag" transfer-ownership="none">
          <doc xml:space="preserve">ID3v2 tag to convert to GStreamer tag</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_from_id3_user_tag" c:identifier="gst_tag_from_id3_user_tag">
      <doc xml:space="preserve">Looks up the GStreamer tag for an ID3v2 user tag (e.g. description in
TXXX frame or owner in UFID frame).</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">The corresponding GStreamer tag or NULL if none exists.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="type" transfer-ownership="none">
          <doc xml:space="preserve">the type of ID3v2 user tag (e.g. "TXXX" or "UDIF")</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
        <parameter name="id3_user_tag" transfer-ownership="none">
          <doc xml:space="preserve">ID3v2 user tag to convert to GStreamer tag</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_from_vorbis_tag" c:identifier="gst_tag_from_vorbis_tag">
      <doc xml:space="preserve">Looks up the GStreamer tag for a vorbiscomment tag.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">The corresponding GStreamer tag or NULL if none exists.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="vorbis_tag" transfer-ownership="none">
          <doc xml:space="preserve">vorbiscomment tag to convert to GStreamer tag</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_id3v2_tag_size" c:identifier="gst_tag_get_id3v2_tag_size">
      <doc xml:space="preserve">Determines size of an ID3v2 tag on buffer containing at least ID3v2 header,
i.e. at least #GST_TAG_ID3V2_HEADER_SIZE (10) bytes;</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">Size of tag, or 0 if header is invalid or too small.</doc>
        <type name="guint" c:type="guint"/>
      </return-value>
      <parameters>
        <parameter name="buffer" transfer-ownership="none">
          <doc xml:space="preserve">buffer holding ID3v2 tag (or at least the start of one)</doc>
          <type name="Gst.Buffer" c:type="GstBuffer*"/>
        </parameter>
      </parameters>
    </function>
    <function-macro name="tag_get_language_code" c:identifier="gst_tag_get_language_code" introspectable="0">
      <doc xml:space="preserve">Convenience macro wrapping gst_tag_get_language_code_iso_639_1().</doc>
      
      <parameters>
        <parameter name="lang_code">
          <doc xml:space="preserve">ISO-639 language code (e.g. "deu" or "ger" or "de")</doc>
        </parameter>
      </parameters>
    </function-macro>
    <function name="tag_get_language_code_iso_639_1" c:identifier="gst_tag_get_language_code_iso_639_1">
      <doc xml:space="preserve">Returns two-letter ISO-639-1 language code given a three-letter ISO-639-2
language code or two-letter ISO-639-1 language code (both are accepted for
convenience).

Language codes are case-sensitive and expected to be lower case.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">two-letter ISO-639-1 language code string that maps to @lang_code,
    or NULL if no mapping is known. The returned string must not be
    modified or freed.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="lang_code" transfer-ownership="none">
          <doc xml:space="preserve">ISO-639 language code (e.g. "deu" or "ger" or "de")</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_language_code_iso_639_2B" c:identifier="gst_tag_get_language_code_iso_639_2B">
      <doc xml:space="preserve">Returns three-letter ISO-639-2 "bibliographic" language code given a
two-letter ISO-639-1 language code or a three-letter ISO-639-2 language
code (both are accepted for convenience).

The "bibliographic" code is derived from the English name of the language
(e.g. "ger" for German instead of "de" or "deu"). In most scenarios, the
"terminological" codes are preferred.

Language codes are case-sensitive and expected to be lower case.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">three-letter ISO-639-2 language code string that maps to @lang_code,
    or NULL if no mapping is known. The returned string must not be
    modified or freed.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="lang_code" transfer-ownership="none">
          <doc xml:space="preserve">ISO-639 language code (e.g. "deu" or "ger" or "de")</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_language_code_iso_639_2T" c:identifier="gst_tag_get_language_code_iso_639_2T">
      <doc xml:space="preserve">Returns three-letter ISO-639-2 "terminological" language code given a
two-letter ISO-639-1 language code or a three-letter ISO-639-2 language
code (both are accepted for convenience).

The "terminological" code is derived from the local name of the language
(e.g. "deu" for German instead of "ger"). In most scenarios, the
"terminological" codes are preferred over the "bibliographic" ones.

Language codes are case-sensitive and expected to be lower case.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">three-letter ISO-639-2 language code string that maps to @lang_code,
    or NULL if no mapping is known. The returned string must not be
    modified or freed.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="lang_code" transfer-ownership="none">
          <doc xml:space="preserve">ISO-639 language code (e.g. "deu" or "ger" or "de")</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_language_codes" c:identifier="gst_tag_get_language_codes">
      <doc xml:space="preserve">Returns a list of known language codes (in form of two-letter ISO-639-1
codes). This is useful for UIs to build a list of available languages for
tagging purposes (e.g. to tag an audio track appropriately in a video or
audio editor).</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">NULL-terminated string array with two-letter
    language codes. Free with g_strfreev() when no longer needed.</doc>
        <array c:type="gchar**">
          <type name="utf8"/>
        </array>
      </return-value>
    </function>
    <function name="tag_get_language_name" c:identifier="gst_tag_get_language_name">
      <doc xml:space="preserve">Returns the name of the language given an ISO-639 language code as
found in a GST_TAG_LANGUAGE_CODE tag. The name will be translated
according to the current locale (if the library was built against the
iso-codes package, otherwise the English name will be returned).

Language codes are case-sensitive and expected to be lower case.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">language name in UTF-8 format, or NULL if @language_code could
    not be mapped to a language name. The returned string must not be
    modified and does not need to freed; it will stay valid until the
    application is terminated.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="language_code" transfer-ownership="none">
          <doc xml:space="preserve">two or three-letter ISO-639 language code</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_license_description" c:identifier="gst_tag_get_license_description">
      <doc xml:space="preserve">Get the description of a license, which is a translated description
of the license's main features.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">the description of the license, or NULL if the license is unknown
   or a description is not available.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="license_ref" transfer-ownership="none">
          <doc xml:space="preserve">a license reference string in form of a URI,
    e.g. "http://creativecommons.org/licenses/by-nc-nd/2.0/"</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_license_flags" c:identifier="gst_tag_get_license_flags">
      <doc xml:space="preserve">Get the flags of a license, which describe most of the features of
a license in their most general form.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">the flags of the license, or 0 if the license is unknown</doc>
        <type name="TagLicenseFlags" c:type="GstTagLicenseFlags"/>
      </return-value>
      <parameters>
        <parameter name="license_ref" transfer-ownership="none">
          <doc xml:space="preserve">a license reference string in form of a URI,
    e.g. "http://creativecommons.org/licenses/by-nc-nd/2.0/"</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_license_jurisdiction" c:identifier="gst_tag_get_license_jurisdiction">
      <doc xml:space="preserve">Get the jurisdiction code of a license. This is usually a two-letter
ISO 3166-1 alpha-2 code, but there is also the special case of Scotland,
for which no code exists and which is thus represented as "scotland".

Known jurisdictions: ar, at, au, be, bg, br, ca, ch, cl, cn, co, de,
dk, es, fi, fr, hr, hu, il, in, it, jp, kr, mk, mt, mx, my, nl, pe, pl,
pt, scotland, se, si, tw, uk, us, za.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">the jurisdiction code of the license, or NULL if the license is
   unknown or is not specific to a particular jurisdiction.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="license_ref" transfer-ownership="none">
          <doc xml:space="preserve">a license reference string in form of a URI,
    e.g. "http://creativecommons.org/licenses/by-nc-nd/2.0/"</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_license_nick" c:identifier="gst_tag_get_license_nick">
      <doc xml:space="preserve">Get the nick name of a license, which is a short (untranslated) string
such as e.g. "CC BY-NC-ND 2.0 UK".</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">the nick name of the license, or NULL if the license is unknown</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="license_ref" transfer-ownership="none">
          <doc xml:space="preserve">a license reference string in form of a URI,
    e.g. "http://creativecommons.org/licenses/by-nc-nd/2.0/"</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_license_title" c:identifier="gst_tag_get_license_title">
      <doc xml:space="preserve">Get the title of a license, which is a short translated description
of the license's features (generally not very pretty though).</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">the title of the license, or NULL if the license is unknown or
   no title is available.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="license_ref" transfer-ownership="none">
          <doc xml:space="preserve">a license reference string in form of a URI,
    e.g. "http://creativecommons.org/licenses/by-nc-nd/2.0/"</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_license_version" c:identifier="gst_tag_get_license_version">
      <doc xml:space="preserve">Get the version of a license.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">the version of the license, or NULL if the license is not known or
   has no version</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="license_ref" transfer-ownership="none">
          <doc xml:space="preserve">a license reference string in form of a URI,
    e.g. "http://creativecommons.org/licenses/by-nc-nd/2.0/"</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_get_licenses" c:identifier="gst_tag_get_licenses">
      <doc xml:space="preserve">Returns a list of known license references (in form of URIs). This is
useful for UIs to build a list of available licenses for tagging purposes
(e.g. to tag an audio track appropriately in a video or audio editor, or
an image in a camera application).</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">NULL-terminated array of license strings. Free
    with g_strfreev() when no longer needed.</doc>
        <array c:type="gchar**">
          <type name="utf8"/>
        </array>
      </return-value>
    </function>
    <function name="tag_id3_genre_count" c:identifier="gst_tag_id3_genre_count">
      <doc xml:space="preserve">Gets the number of ID3v1 genres that can be identified. Winamp genres are
included.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">the number of ID3v1 genres that can be identified</doc>
        <type name="guint" c:type="guint"/>
      </return-value>
    </function>
    <function name="tag_id3_genre_get" c:identifier="gst_tag_id3_genre_get">
      <doc xml:space="preserve">Gets the ID3v1 genre name for a given ID.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">the genre or NULL if no genre is associated with that ID.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="id" transfer-ownership="none">
          <doc xml:space="preserve">ID of genre to query</doc>
          <type name="guint" c:type="const guint"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_image_data_to_image_sample" c:identifier="gst_tag_image_data_to_image_sample">
      <doc xml:space="preserve">Helper function for tag-reading plugins to create a #GstSample suitable to
add to a #GstTagList as an image tag (such as #GST_TAG_IMAGE or
#GST_TAG_PREVIEW_IMAGE) from the encoded image data and an (optional) image
type.

Background: cover art and other images in tags are usually stored as a
blob of binary image data, often accompanied by a MIME type or some other
content type string (e.g. 'png', 'jpeg', 'jpg'). Sometimes there is also an
'image type' to indicate what kind of image this is (e.g. front cover,
back cover, artist, etc.). The image data may also be an URI to the image
rather than the image itself.

In GStreamer, image tags are #GstSample&lt;!-- --&gt;s containing the raw image
data, with the sample caps describing the content type of the image
(e.g. image/jpeg, image/png, text/uri-list). The sample info may contain
an additional 'image-type' field of #GstTagImageType to describe
the type of image (front cover, back cover etc.). #GST_TAG_PREVIEW_IMAGE
tags should not carry an image type, their type is already indicated via
the special tag name.

This function will do various checks and typefind the encoded image
data (we can't trust the declared mime type).</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">a newly-allocated image sample for use in tag lists, or NULL</doc>
        <type name="Gst.Sample" c:type="GstSample*"/>
      </return-value>
      <parameters>
        <parameter name="image_data" transfer-ownership="none">
          <doc xml:space="preserve">the (encoded) image</doc>
          <array length="1" zero-terminated="0" c:type="const guint8*">
            <type name="guint8" c:type="guint8"/>
          </array>
        </parameter>
        <parameter name="image_data_len" transfer-ownership="none">
          <doc xml:space="preserve">the length of the encoded image data at @image_data</doc>
          <type name="guint" c:type="guint"/>
        </parameter>
        <parameter name="image_type" transfer-ownership="none">
          <doc xml:space="preserve">type of the image, or #GST_TAG_IMAGE_TYPE_UNDEFINED. Pass
    #GST_TAG_IMAGE_TYPE_NONE if no image type should be set at all (e.g.
    for preview images)</doc>
          <type name="TagImageType" c:type="GstTagImageType"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_add_id3_image" c:identifier="gst_tag_list_add_id3_image">
      <doc xml:space="preserve">Adds an image from an ID3 APIC frame (or similar, such as used in FLAC)
to the given tag list. Also see gst_tag_image_data_to_image_sample() for
more information on image tags in GStreamer.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">%TRUE if the image was processed, otherwise %FALSE</doc>
        <type name="gboolean" c:type="gboolean"/>
      </return-value>
      <parameters>
        <parameter name="tag_list" transfer-ownership="none">
          <doc xml:space="preserve">a tag list</doc>
          <type name="Gst.TagList" c:type="GstTagList*"/>
        </parameter>
        <parameter name="image_data" transfer-ownership="none">
          <doc xml:space="preserve">the (encoded) image</doc>
          <array length="2" zero-terminated="0" c:type="const guint8*">
            <type name="guint8" c:type="guint8"/>
          </array>
        </parameter>
        <parameter name="image_data_len" transfer-ownership="none">
          <doc xml:space="preserve">the length of the encoded image data at @image_data</doc>
          <type name="guint" c:type="guint"/>
        </parameter>
        <parameter name="id3_picture_type" transfer-ownership="none">
          <doc xml:space="preserve">picture type as per the ID3 (v2.4.0) specification for
   the APIC frame (0 = unknown/other)</doc>
          <type name="guint" c:type="guint"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_from_exif_buffer" c:identifier="gst_tag_list_from_exif_buffer">
      <doc xml:space="preserve">Parses the IFD and IFD tags data contained in the buffer and puts it
on a taglist. The base_offset is used to subtract from the offset in
the tag entries and be able to get the offset relative to the buffer
start</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">The parsed taglist</doc>
        <type name="Gst.TagList" c:type="GstTagList*"/>
      </return-value>
      <parameters>
        <parameter name="buffer" transfer-ownership="none">
          <doc xml:space="preserve">The exif buffer</doc>
          <type name="Gst.Buffer" c:type="GstBuffer*"/>
        </parameter>
        <parameter name="byte_order" transfer-ownership="none">
          <doc xml:space="preserve">byte order of the data</doc>
          <type name="gint" c:type="gint"/>
        </parameter>
        <parameter name="base_offset" transfer-ownership="none">
          <doc xml:space="preserve">Offset from the tiff header to this buffer</doc>
          <type name="guint32" c:type="guint32"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_from_exif_buffer_with_tiff_header" c:identifier="gst_tag_list_from_exif_buffer_with_tiff_header">
      <doc xml:space="preserve">Parses the exif tags starting with a tiff header structure.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">The taglist</doc>
        <type name="Gst.TagList" c:type="GstTagList*"/>
      </return-value>
      <parameters>
        <parameter name="buffer" transfer-ownership="none">
          <doc xml:space="preserve">The exif buffer</doc>
          <type name="Gst.Buffer" c:type="GstBuffer*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_from_id3v2_tag" c:identifier="gst_tag_list_from_id3v2_tag">
      <doc xml:space="preserve">Creates a new tag list that contains the information parsed out of a
ID3 tag.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">A new #GstTagList with all tags that could be extracted from the
         given vorbiscomment buffer or NULL on error.</doc>
        <type name="Gst.TagList" c:type="GstTagList*"/>
      </return-value>
      <parameters>
        <parameter name="buffer" transfer-ownership="none">
          <doc xml:space="preserve">buffer to convert</doc>
          <type name="Gst.Buffer" c:type="GstBuffer*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_from_vorbiscomment" c:identifier="gst_tag_list_from_vorbiscomment">
      <doc xml:space="preserve">Creates a new tag list that contains the information parsed out of a
vorbiscomment packet.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">A new #GstTagList with all tags that could be extracted from the
         given vorbiscomment buffer or NULL on error.</doc>
        <type name="Gst.TagList" c:type="GstTagList*"/>
      </return-value>
      <parameters>
        <parameter name="data" transfer-ownership="none">
          <doc xml:space="preserve">data to convert</doc>
          <array length="1" zero-terminated="0" c:type="const guint8*">
            <type name="guint8" c:type="guint8"/>
          </array>
        </parameter>
        <parameter name="size" transfer-ownership="none">
          <doc xml:space="preserve">size of @data</doc>
          <type name="gsize" c:type="gsize"/>
        </parameter>
        <parameter name="id_data" transfer-ownership="none">
          <doc xml:space="preserve">identification data at start of stream</doc>
          <array length="3" zero-terminated="0" c:type="const guint8*">
            <type name="guint8" c:type="guint8"/>
          </array>
        </parameter>
        <parameter name="id_data_length" transfer-ownership="none">
          <doc xml:space="preserve">length of identification data</doc>
          <type name="guint" c:type="const guint"/>
        </parameter>
        <parameter name="vendor_string" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
          <doc xml:space="preserve">pointer to a string that should take the
    vendor string of this vorbis comment or NULL if you don't need it.</doc>
          <type name="utf8" c:type="gchar**"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_from_vorbiscomment_buffer" c:identifier="gst_tag_list_from_vorbiscomment_buffer">
      <doc xml:space="preserve">Creates a new tag list that contains the information parsed out of a
vorbiscomment packet.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">A new #GstTagList with all tags that could be extracted from the
         given vorbiscomment buffer or NULL on error.</doc>
        <type name="Gst.TagList" c:type="GstTagList*"/>
      </return-value>
      <parameters>
        <parameter name="buffer" transfer-ownership="none">
          <doc xml:space="preserve">buffer to convert</doc>
          <type name="Gst.Buffer" c:type="GstBuffer*"/>
        </parameter>
        <parameter name="id_data" transfer-ownership="none">
          <doc xml:space="preserve">identification data at start of stream</doc>
          <array length="2" zero-terminated="0" c:type="const guint8*">
            <type name="guint8" c:type="guint8"/>
          </array>
        </parameter>
        <parameter name="id_data_length" transfer-ownership="none">
          <doc xml:space="preserve">length of identification data</doc>
          <type name="guint" c:type="const guint"/>
        </parameter>
        <parameter name="vendor_string" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
          <doc xml:space="preserve">pointer to a string that should take the
    vendor string of this vorbis comment or NULL if you don't need it.</doc>
          <type name="utf8" c:type="gchar**"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_from_xmp_buffer" c:identifier="gst_tag_list_from_xmp_buffer">
      <doc xml:space="preserve">Parse a xmp packet into a taglist.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">new taglist or %NULL, free the list when done</doc>
        <type name="Gst.TagList" c:type="GstTagList*"/>
      </return-value>
      <parameters>
        <parameter name="buffer" transfer-ownership="none">
          <doc xml:space="preserve">buffer</doc>
          <type name="Gst.Buffer" c:type="GstBuffer*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_new_from_id3v1" c:identifier="gst_tag_list_new_from_id3v1">
      <doc xml:space="preserve">Parses the data containing an ID3v1 tag and returns a #GstTagList from the
parsed data.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">A new tag list or NULL if the data was not an ID3v1 tag.</doc>
        <type name="Gst.TagList" c:type="GstTagList*"/>
      </return-value>
      <parameters>
        <parameter name="data" transfer-ownership="none">
          <doc xml:space="preserve">128 bytes of data containing the ID3v1 tag</doc>
          <array zero-terminated="0" c:type="const guint8*" fixed-size="128">
            <type name="guint8" c:type="guint8"/>
          </array>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_to_exif_buffer" c:identifier="gst_tag_list_to_exif_buffer">
      <doc xml:space="preserve">Formats the tags in taglist on exif format. The resulting buffer contains
the tags IFD and is followed by the data pointed by the tag entries.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">A GstBuffer containing the tag entries followed by the tag data</doc>
        <type name="Gst.Buffer" c:type="GstBuffer*"/>
      </return-value>
      <parameters>
        <parameter name="taglist" transfer-ownership="none">
          <doc xml:space="preserve">The taglist</doc>
          <type name="Gst.TagList" c:type="const GstTagList*"/>
        </parameter>
        <parameter name="byte_order" transfer-ownership="none">
          <doc xml:space="preserve">byte order used in writing (G_LITTLE_ENDIAN or G_BIG_ENDIAN)</doc>
          <type name="gint" c:type="gint"/>
        </parameter>
        <parameter name="base_offset" transfer-ownership="none">
          <doc xml:space="preserve">Offset from the tiff header first byte</doc>
          <type name="guint32" c:type="guint32"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_to_exif_buffer_with_tiff_header" c:identifier="gst_tag_list_to_exif_buffer_with_tiff_header">
      <doc xml:space="preserve">Formats the tags in taglist into exif structure, a tiff header
is put in the beginning of the buffer.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">A GstBuffer containing the data</doc>
        <type name="Gst.Buffer" c:type="GstBuffer*"/>
      </return-value>
      <parameters>
        <parameter name="taglist" transfer-ownership="none">
          <doc xml:space="preserve">The taglist</doc>
          <type name="Gst.TagList" c:type="const GstTagList*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_to_vorbiscomment_buffer" c:identifier="gst_tag_list_to_vorbiscomment_buffer">
      <doc xml:space="preserve">Creates a new vorbiscomment buffer from a tag list.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">A new #GstBuffer containing a vorbiscomment buffer with all tags
         that could be converted from the given tag list.</doc>
        <type name="Gst.Buffer" c:type="GstBuffer*"/>
      </return-value>
      <parameters>
        <parameter name="list" transfer-ownership="none">
          <doc xml:space="preserve">tag list to convert</doc>
          <type name="Gst.TagList" c:type="const GstTagList*"/>
        </parameter>
        <parameter name="id_data" transfer-ownership="none">
          <doc xml:space="preserve">identification data at start of stream</doc>
          <array length="2" zero-terminated="0" c:type="const guint8*">
            <type name="guint8" c:type="guint8"/>
          </array>
        </parameter>
        <parameter name="id_data_length" transfer-ownership="none">
          <doc xml:space="preserve">length of identification data, may be 0 if @id_data is NULL</doc>
          <type name="guint" c:type="const guint"/>
        </parameter>
        <parameter name="vendor_string" transfer-ownership="none" nullable="1" allow-none="1">
          <doc xml:space="preserve">string that describes the vendor string or NULL</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_list_to_xmp_buffer" c:identifier="gst_tag_list_to_xmp_buffer">
      <doc xml:space="preserve">Formats a taglist as a xmp packet using only the selected
schemas. An empty list (%NULL) means that all schemas should
be used</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">new buffer or %NULL, unref the buffer when done</doc>
        <type name="Gst.Buffer" c:type="GstBuffer*"/>
      </return-value>
      <parameters>
        <parameter name="list" transfer-ownership="none">
          <doc xml:space="preserve">tags</doc>
          <type name="Gst.TagList" c:type="const GstTagList*"/>
        </parameter>
        <parameter name="read_only" transfer-ownership="none">
          <doc xml:space="preserve">does the container forbid inplace editing</doc>
          <type name="gboolean" c:type="gboolean"/>
        </parameter>
        <parameter name="schemas" transfer-ownership="none">
          <doc xml:space="preserve">
    %NULL terminated array of schemas to be used on serialization</doc>
          <array c:type="const gchar**">
            <type name="utf8" c:type="gchar*"/>
          </array>
        </parameter>
      </parameters>
    </function>
    <function name="tag_parse_extended_comment" c:identifier="gst_tag_parse_extended_comment">
      <doc xml:space="preserve">Convenience function to parse a GST_TAG_EXTENDED_COMMENT string and
separate it into its components.

If successful, @key, @lang and/or @value will be set to newly allocated
strings that you need to free with g_free() when done. @key and @lang
may also be set to NULL by this function if there is no key or no language
code in the extended comment string.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">TRUE if the string could be parsed, otherwise FALSE</doc>
        <type name="gboolean" c:type="gboolean"/>
      </return-value>
      <parameters>
        <parameter name="ext_comment" transfer-ownership="none">
          <doc xml:space="preserve">an extended comment string, see #GST_TAG_EXTENDED_COMMENT</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
        <parameter name="key" direction="out" caller-allocates="0" transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">
    return location for the comment description key, or NULL</doc>
          <type name="utf8" c:type="gchar**"/>
        </parameter>
        <parameter name="lang" direction="out" caller-allocates="0" transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">
    return location for the comment ISO-639 language code, or NULL</doc>
          <type name="utf8" c:type="gchar**"/>
        </parameter>
        <parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
          <doc xml:space="preserve">return location for the actual comment string, or NULL</doc>
          <type name="utf8" c:type="gchar**"/>
        </parameter>
        <parameter name="fail_if_no_key" transfer-ownership="none">
          <doc xml:space="preserve">whether to fail if strings are not in key=value form</doc>
          <type name="gboolean" c:type="gboolean"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_register_musicbrainz_tags" c:identifier="gst_tag_register_musicbrainz_tags">
      <doc xml:space="preserve">Registers additional musicbrainz-specific tags with the GStreamer tag
system. Plugins and applications that use these tags should call this
function before using them. Can be called multiple times.</doc>
      
      <return-value transfer-ownership="none">
        <type name="none" c:type="void"/>
      </return-value>
    </function>
    <function name="tag_to_id3_tag" c:identifier="gst_tag_to_id3_tag">
      <doc xml:space="preserve">Looks up the ID3v2 tag for a GStreamer tag.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">The corresponding ID3v2 tag or NULL if none exists.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="gst_tag" transfer-ownership="none">
          <doc xml:space="preserve">GStreamer tag to convert to vorbiscomment tag</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_to_vorbis_comments" c:identifier="gst_tag_to_vorbis_comments">
      <doc xml:space="preserve">Creates a new tag list that contains the information parsed out of a
vorbiscomment packet.</doc>
      
      <return-value transfer-ownership="full">
        <doc xml:space="preserve">A #GList of newly-allocated
    key=value strings. Free with g_list_foreach (list, (GFunc) g_free, NULL)
    plus g_list_free (list)</doc>
        <type name="GLib.List" c:type="GList*">
          <type name="utf8"/>
        </type>
      </return-value>
      <parameters>
        <parameter name="list" transfer-ownership="none">
          <doc xml:space="preserve">a #GstTagList</doc>
          <type name="Gst.TagList" c:type="const GstTagList*"/>
        </parameter>
        <parameter name="tag" transfer-ownership="none">
          <doc xml:space="preserve">a GStreamer tag identifier, such as #GST_TAG_ARTIST</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_to_vorbis_tag" c:identifier="gst_tag_to_vorbis_tag">
      <doc xml:space="preserve">Looks up the vorbiscomment tag for a GStreamer tag.</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">The corresponding vorbiscomment tag or NULL if none exists.</doc>
        <type name="utf8" c:type="const gchar*"/>
      </return-value>
      <parameters>
        <parameter name="gst_tag" transfer-ownership="none">
          <doc xml:space="preserve">GStreamer tag to convert to vorbiscomment tag</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
    <function name="tag_xmp_list_schemas" c:identifier="gst_tag_xmp_list_schemas">
      <doc xml:space="preserve">Gets the list of supported schemas in the xmp lib</doc>
      
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">a %NULL terminated array of strings with the
    schema names</doc>
        <array c:type="const gchar**">
          <type name="utf8"/>
        </array>
      </return-value>
    </function>
    <function name="vorbis_tag_add" c:identifier="gst_vorbis_tag_add">
      <doc xml:space="preserve">Convenience function using gst_tag_from_vorbis_tag(), parsing
a vorbis comment string into the right type and adding it to the
given taglist @list.

Unknown vorbiscomment tags will be added to the tag list in form
of a #GST_TAG_EXTENDED_COMMENT.</doc>
      
      <return-value transfer-ownership="none">
        <type name="none" c:type="void"/>
      </return-value>
      <parameters>
        <parameter name="list" transfer-ownership="none">
          <doc xml:space="preserve">a #GstTagList</doc>
          <type name="Gst.TagList" c:type="GstTagList*"/>
        </parameter>
        <parameter name="tag" transfer-ownership="none">
          <doc xml:space="preserve">a vorbiscomment tag string (key in key=value), must be valid UTF-8</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
        <parameter name="value" transfer-ownership="none">
          <doc xml:space="preserve">a vorbiscomment value string (value in key=value), must be valid UTF-8</doc>
          <type name="utf8" c:type="const gchar*"/>
        </parameter>
      </parameters>
    </function>
  </namespace>
</repository>