/* GStreamer

 * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>

 *

 * gsttaglist.h: Header for tag support

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifndef __GST_TAGLIST_H__

#define __GST_TAGLIST_H__

#include <gst/gstdatetime.h>

#include <gst/gstsample.h>

#include <gst/gstbuffer.h>

#include <gst/glib-compat.h>

G_BEGIN_DECLS

/**

 * GstTagMergeMode:

 * @GST_TAG_MERGE_UNDEFINED: undefined merge mode

 * @GST_TAG_MERGE_REPLACE_ALL: replace all tags (clear list and append)

 * @GST_TAG_MERGE_REPLACE: replace tags

 * @GST_TAG_MERGE_APPEND: append tags

 * @GST_TAG_MERGE_PREPEND: prepend tags

 * @GST_TAG_MERGE_KEEP: keep existing tags

 * @GST_TAG_MERGE_KEEP_ALL: keep all existing tags

 * @GST_TAG_MERGE_COUNT: the number of merge modes

 *

 * The different tag merging modes are basically replace, overwrite and append,

 * but they can be seen from two directions. Given two taglists: (A) the tags

 * already in the element and (B) the ones that are supplied to the element (

 * e.g. via gst_tag_setter_merge_tags() / gst_tag_setter_add_tags() or a

 * %GST_EVENT_TAG), how are these tags merged?

 * In the table below this is shown for the cases that a tag exists in the list

 * (A) or does not exists (!A) and combinations thereof.

 *

 * 

 *   <title>merge mode</title>

 *   <tgroup cols='5' align='left'>

 *     

 *       <row>

 *         <entry>merge mode</entry>

 *         <entry>A + B</entry>

 *         <entry>A + !B</entry>

 *         <entry>!A + B</entry>

 *         <entry>!A + !B</entry>

 *       </row>

 *     

 *     

 *       <row>

 *         <entry>REPLACE_ALL</entry>

 *         <entry>B</entry>

 *         <entry>-</entry>

 *         <entry>B</entry>

 *         <entry>-</entry>

 *       </row>

 *       <row>

 *         <entry>REPLACE</entry>

 *         <entry>B</entry>

 *         <entry>A</entry>

 *         <entry>B</entry>

 *         <entry>-</entry>

 *       </row>

 *       <row>

 *         <entry>APPEND</entry>

 *         <entry>A, B</entry>

 *         <entry>A</entry>

 *         <entry>B</entry>

 *         <entry>-</entry>

 *       </row>

 *       <row>

 *         <entry>PREPEND</entry>

 *         <entry>B, A</entry>

 *         <entry>A</entry>

 *         <entry>B</entry>

 *         <entry>-</entry>

 *       </row>

 *       <row>

 *         <entry>KEEP</entry>

 *         <entry>A</entry>

 *         <entry>A</entry>

 *         <entry>B</entry>

 *         <entry>-</entry>

 *       </row>

 *       <row>

 *         <entry>KEEP_ALL</entry>

 *         <entry>A</entry>

 *         <entry>A</entry>

 *         <entry>-</entry>

 *         <entry>-</entry>

 *       </row>

 *     

 *   </tgroup>

 * 

 */

typedef enum {

  GST_TAG_MERGE_UNDEFINED,

  GST_TAG_MERGE_REPLACE_ALL,

  GST_TAG_MERGE_REPLACE,

  GST_TAG_MERGE_APPEND,

  GST_TAG_MERGE_PREPEND,

  GST_TAG_MERGE_KEEP,

  GST_TAG_MERGE_KEEP_ALL,

  /* add more */

  GST_TAG_MERGE_COUNT

} GstTagMergeMode;

#define GST_TAG_MODE_IS_VALID(mode)     (((mode) > GST_TAG_MERGE_UNDEFINED) && ((mode) < GST_TAG_MERGE_COUNT))

/**

 * GstTagFlag:

 * @GST_TAG_FLAG_UNDEFINED: undefined flag

 * @GST_TAG_FLAG_META: tag is meta data

 * @GST_TAG_FLAG_ENCODED: tag is encoded

 * @GST_TAG_FLAG_DECODED: tag is decoded

 * @GST_TAG_FLAG_COUNT: number of tag flags

 *

 * Extra tag flags used when registering tags.

 */

/* FIXME: these are not really flags .. */

typedef enum {

  GST_TAG_FLAG_UNDEFINED,

  GST_TAG_FLAG_META,

  GST_TAG_FLAG_ENCODED,

  GST_TAG_FLAG_DECODED,

  GST_TAG_FLAG_COUNT

} GstTagFlag;

#define GST_TAG_FLAG_IS_VALID(flag)     (((flag) > GST_TAG_FLAG_UNDEFINED) && ((flag) < GST_TAG_FLAG_COUNT))

/**

 * GstTagList:

 * @mini_object: the parent type

 *

 * Object describing tags / metadata.

 */

typedef struct _GstTagList GstTagList;

struct _GstTagList {

  GstMiniObject mini_object;

};

GST_API GType _gst_tag_list_type;

#define GST_TAG_LIST(x)       ((GstTagList *) (x))

#define GST_TYPE_TAG_LIST     (_gst_tag_list_type)

#define GST_IS_TAG_LIST(obj)  (GST_IS_MINI_OBJECT_TYPE((obj), GST_TYPE_TAG_LIST))

/**

 * GstTagForeachFunc:

 * @list: the #GstTagList

 * @tag: a name of a tag in @list

 * @user_data: user data

 *

 * A function that will be called in gst_tag_list_foreach(). The function may

 * not modify the tag list.

 */

typedef void (*GstTagForeachFunc) (const GstTagList * list,

                                   const gchar      * tag,

                                   gpointer           user_data);

/**

 * GstTagMergeFunc:

 * @dest: the destination #GValue

 * @src: the source #GValue

 *

 * A function for merging multiple values of a tag used when registering

 * tags.

 */

typedef void (* GstTagMergeFunc) (GValue *dest, const GValue *src);

GST_API

GType        gst_tag_list_get_type (void);

/* tag registration */

GST_API

void         gst_tag_register      (const gchar     * name,

                                    GstTagFlag        flag,

                                    GType             type,

                                    const gchar     * nick,

                                    const gchar     * blurb,

                                    GstTagMergeFunc   func);

GST_API

void         gst_tag_register_static (const gchar   * name,

                                      GstTagFlag      flag,

                                      GType           type,

                                      const gchar   * nick,

                                      const gchar   * blurb,

                                      GstTagMergeFunc func);

/* some default merging functions */

GST_API

void      gst_tag_merge_use_first          (GValue * dest, const GValue * src);

GST_API

void      gst_tag_merge_strings_with_comma (GValue * dest, const GValue * src);

/* basic tag support */

GST_API

gboolean               gst_tag_exists          (const gchar * tag);

GST_API

GType                  gst_tag_get_type        (const gchar * tag);

GST_API

const gchar *          gst_tag_get_nick        (const gchar * tag);

GST_API

const gchar *          gst_tag_get_description (const gchar * tag);

GST_API

GstTagFlag             gst_tag_get_flag        (const gchar * tag);

GST_API

gboolean               gst_tag_is_fixed        (const gchar * tag);

/* tag lists */

/**

 * GstTagScope:

 * @GST_TAG_SCOPE_STREAM: tags specific to this single stream

 * @GST_TAG_SCOPE_GLOBAL: global tags for the complete medium

 *

 * GstTagScope specifies if a taglist applies to the complete

 * medium or only to one single stream.

 */

typedef enum {

  GST_TAG_SCOPE_STREAM,

  GST_TAG_SCOPE_GLOBAL

} GstTagScope;

GST_API

GstTagList * gst_tag_list_new_empty         (void) G_GNUC_MALLOC;

GST_API

GstTagList * gst_tag_list_new               (const gchar * tag, ...) G_GNUC_MALLOC;

GST_API

GstTagList * gst_tag_list_new_valist        (va_list var_args) G_GNUC_MALLOC;

GST_API

void         gst_tag_list_set_scope         (GstTagList * list, GstTagScope scope);

GST_API

GstTagScope  gst_tag_list_get_scope         (const GstTagList * list);

GST_API

gchar      * gst_tag_list_to_string         (const GstTagList * list) G_GNUC_MALLOC;

GST_API

GstTagList * gst_tag_list_new_from_string   (const gchar      * str) G_GNUC_MALLOC;

GST_API

gint         gst_tag_list_n_tags            (const GstTagList * list);

GST_API

const gchar* gst_tag_list_nth_tag_name      (const GstTagList * list, guint index);

GST_API

gboolean     gst_tag_list_is_empty          (const GstTagList * list);

GST_API

gboolean     gst_tag_list_is_equal          (const GstTagList * list1,

                                             const GstTagList * list2);

GST_API

void         gst_tag_list_insert            (GstTagList       * into,

                                             const GstTagList * from,

                                             GstTagMergeMode    mode);

GST_API

GstTagList * gst_tag_list_merge             (const GstTagList * list1,

                                             const GstTagList * list2,

                                             GstTagMergeMode    mode) G_GNUC_MALLOC;

GST_API

guint        gst_tag_list_get_tag_size      (const GstTagList * list,

                                             const gchar      * tag);

GST_API

void         gst_tag_list_add               (GstTagList       * list,

                                             GstTagMergeMode    mode,

                                             const gchar      * tag,

                                             ...) G_GNUC_NULL_TERMINATED;

GST_API

void         gst_tag_list_add_values        (GstTagList       * list,

                                             GstTagMergeMode    mode,

                                             const gchar      * tag,

                                             ...) G_GNUC_NULL_TERMINATED;

GST_API

void         gst_tag_list_add_valist        (GstTagList       * list,

                                             GstTagMergeMode    mode,

                                             const gchar      * tag,

                                             va_list        var_args);

GST_API

void         gst_tag_list_add_valist_values (GstTagList       * list,

                                             GstTagMergeMode    mode,

                                             const gchar      * tag,

                                             va_list            var_args);

GST_API

void         gst_tag_list_add_value         (GstTagList       * list,

                                             GstTagMergeMode    mode,

                                             const gchar      * tag,

                                             const GValue     * value);

GST_API

void         gst_tag_list_remove_tag        (GstTagList       * list,

                                             const gchar      * tag);

GST_API

void         gst_tag_list_foreach           (const GstTagList * list,

                                             GstTagForeachFunc  func,

                                             gpointer           user_data);

GST_API

const GValue *

             gst_tag_list_get_value_index   (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index);

GST_API

gboolean     gst_tag_list_copy_value        (GValue           * dest,

                                             const GstTagList * list,

                                             const gchar      * tag);

/* simplifications (FIXME: do we want them?) */

GST_API

gboolean     gst_tag_list_get_boolean       (const GstTagList * list,

                                             const gchar      * tag,

                                             gboolean         * value);

GST_API

gboolean     gst_tag_list_get_boolean_index (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             gboolean         * value);

GST_API

gboolean     gst_tag_list_get_int           (const GstTagList * list,

                                             const gchar      * tag,

                                             gint             * value);

GST_API

gboolean     gst_tag_list_get_int_index     (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             gint             * value);

GST_API

gboolean     gst_tag_list_get_uint          (const GstTagList * list,

                                             const gchar      * tag,

                                             guint            * value);

GST_API

gboolean     gst_tag_list_get_uint_index    (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             guint            * value);

GST_API

gboolean     gst_tag_list_get_int64         (const GstTagList * list,

                                             const gchar      * tag,

                                             gint64           * value);

GST_API

gboolean     gst_tag_list_get_int64_index   (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             gint64           * value);

GST_API

gboolean     gst_tag_list_get_uint64        (const GstTagList * list,

                                             const gchar      * tag,

                                             guint64          * value);

GST_API

gboolean     gst_tag_list_get_uint64_index  (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             guint64          * value);

GST_API

gboolean     gst_tag_list_get_float         (const GstTagList * list,

                                             const gchar      * tag,

                                             gfloat           * value);

GST_API

gboolean     gst_tag_list_get_float_index   (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             gfloat           * value);

GST_API

gboolean     gst_tag_list_get_double        (const GstTagList * list,

                                             const gchar      * tag,

                                             gdouble          * value);

GST_API

gboolean     gst_tag_list_get_double_index  (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             gdouble          * value);

GST_API

gboolean     gst_tag_list_get_string        (const GstTagList * list,

                                             const gchar      * tag,

                                             gchar           ** value);

GST_API

gboolean     gst_tag_list_get_string_index  (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             gchar           ** value);

GST_API

gboolean     gst_tag_list_peek_string_index (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             const gchar     ** value);

GST_API

gboolean     gst_tag_list_get_pointer       (const GstTagList * list,

                                             const gchar      * tag,

                                             gpointer         * value);

GST_API

gboolean     gst_tag_list_get_pointer_index (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             gpointer         * value);

GST_API

gboolean     gst_tag_list_get_date          (const GstTagList * list,

                                             const gchar      * tag,

                                             GDate           ** value);

GST_API

gboolean     gst_tag_list_get_date_index    (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             GDate           ** value);

GST_API

gboolean     gst_tag_list_get_date_time     (const GstTagList * list,

                                             const gchar      * tag,

                                             GstDateTime     ** value);

GST_API

gboolean     gst_tag_list_get_date_time_index (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             GstDateTime     ** value);

GST_API

gboolean     gst_tag_list_get_sample        (const GstTagList * list,

                                             const gchar      * tag,

                                             GstSample       ** sample);

GST_API

gboolean     gst_tag_list_get_sample_index  (const GstTagList * list,

                                             const gchar      * tag,

                                             guint              index,

                                             GstSample       ** sample);

/* refcounting */

/**

 * gst_tag_list_ref:

 * @taglist: the #GstTagList to reference

 *

 * Add a reference to a #GstTagList mini object.

 *

 * From this point on, until the caller calls gst_tag_list_unref() or

 * gst_tag_list_make_writable(), it is guaranteed that the taglist object will

 * not change. To use a #GstTagList object, you must always have a refcount on

 * it -- either the one made implicitly by e.g. gst_tag_list_new(), or via

 * taking one explicitly with this function.

 *

 * Returns: the same #GstTagList mini object.

 */

static inline GstTagList *

gst_tag_list_ref (GstTagList * taglist)

{

  return (GstTagList *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (taglist));

}

/**

 * gst_tag_list_unref:

 * @taglist: a #GstTagList.

 *

 * Unref a #GstTagList, and and free all its memory when the refcount reaches 0.

 */

static inline void

gst_tag_list_unref (GstTagList * taglist)

{

  gst_mini_object_unref (GST_MINI_OBJECT_CAST (taglist));

}

/**

 * gst_tag_list_copy:

 * @taglist: a #GstTagList.

 *

 * Creates a new #GstTagList as a copy of the old @taglist. The new taglist

 * will have a refcount of 1, owned by the caller, and will be writable as

 * a result.

 *

 * Note that this function is the semantic equivalent of a gst_tag_list_ref()

 * followed by a gst_tag_list_make_writable(). If you only want to hold on to a

 * reference to the data, you should use gst_tag_list_ref().

 *

 * When you are finished with the taglist, call gst_tag_list_unref() on it.

 *

 * Returns: the new #GstTagList

 */

static inline GstTagList *

gst_tag_list_copy (const GstTagList * taglist)

{

  return GST_TAG_LIST (gst_mini_object_copy (GST_MINI_OBJECT_CAST (taglist)));

}

/**

 * gst_tag_list_is_writable:

 * @taglist: a #GstTagList

 *

 * Tests if you can safely modify @taglist. It is only safe to modify taglist

 * when there is only one owner of the taglist - ie, the refcount is 1.

 */

#define gst_tag_list_is_writable(taglist)    gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (taglist))

/**

 * gst_tag_list_make_writable:

 * @taglist: (transfer full): a #GstTagList

 *

 * Returns a writable copy of @taglist.

 *

 * If there is only one reference count on @taglist, the caller must be the

 * owner, and so this function will return the taglist object unchanged. If on

 * the other hand there is more than one reference on the object, a new taglist

 * object will be returned (which will be a copy of @taglist). The caller's

 * reference on @taglist will be removed, and instead the caller will own a

 * reference to the returned object.

 *

 * In short, this function unrefs the taglist in the argument and refs the

 * taglist that it returns. Don't access the argument after calling this

 * function. See also: gst_tag_list_ref().

 *

 * Returns: (transfer full): a writable taglist which may or may not be the

 *     same as @taglist

 */

#define gst_tag_list_make_writable(taglist)   GST_TAG_LIST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (taglist)))

/* GStreamer core tags */

/**

 * GST_TAG_TITLE:

 *

 * commonly used title (string)

 *

 * The title as it should be displayed, e.g. 'The Doll House'

 */

#define GST_TAG_TITLE                  "title"

/**

 * GST_TAG_TITLE_SORTNAME:

 *

 * commonly used title, as used for sorting (string)

 *

 * The title as it should be sorted, e.g. 'Doll House, The'

 */

#define GST_TAG_TITLE_SORTNAME         "title-sortname"

/**

 * GST_TAG_ARTIST:

 *

 * person(s) responsible for the recording (string)

 *

 * The artist name as it should be displayed, e.g. 'Jimi Hendrix' or

 * 'The Guitar Heroes'

 */

#define GST_TAG_ARTIST                 "artist"

/**

 * GST_TAG_ARTIST_SORTNAME:

 *

 * person(s) responsible for the recording, as used for sorting (string)

 *

 * The artist name as it should be sorted, e.g. 'Hendrix, Jimi' or

 * 'Guitar Heroes, The'

 */

#define GST_TAG_ARTIST_SORTNAME        "artist-sortname"

/**

 * GST_TAG_ALBUM:

 *

 * album containing this data (string)

 *

 * The album name as it should be displayed, e.g. 'The Jazz Guitar'

 */

#define GST_TAG_ALBUM                  "album"

/**

 * GST_TAG_ALBUM_SORTNAME:

 *

 * album containing this data, as used for sorting (string)

 *

 * The album name as it should be sorted, e.g. 'Jazz Guitar, The'

 */

#define GST_TAG_ALBUM_SORTNAME         "album-sortname"

/**

 * GST_TAG_ALBUM_ARTIST:

 *

 * The artist of the entire album, as it should be displayed.

 */

#define GST_TAG_ALBUM_ARTIST           "album-artist"

/**

 * GST_TAG_ALBUM_ARTIST_SORTNAME:

 *

 * The artist of the entire album, as it should be sorted.

 */

#define GST_TAG_ALBUM_ARTIST_SORTNAME  "album-artist-sortname"

/**

 * GST_TAG_COMPOSER:

 *

 * person(s) who composed the recording (string)

 */

#define GST_TAG_COMPOSER               "composer"

/**

 * GST_TAG_CONDUCTOR:

 *

 * conductor/performer refinement (string)

 *

 * Since: 1.8

 */

#define GST_TAG_CONDUCTOR               "conductor"

/**

 * GST_TAG_DATE:

 *

 * date the data was created (#GDate structure)

 */

#define GST_TAG_DATE                   "date"

/**

 * GST_TAG_DATE_TIME:

 *

 * date and time the data was created (#GstDateTime structure)

 */

#define GST_TAG_DATE_TIME              "datetime"

/**

 * GST_TAG_GENRE:

 *

 * genre this data belongs to (string)

 */

#define GST_TAG_GENRE                  "genre"

/**

 * GST_TAG_COMMENT:

 *

 * free text commenting the data (string)

 */

#define GST_TAG_COMMENT                "comment"

/**

 * GST_TAG_EXTENDED_COMMENT:

 *

 * key/value text commenting the data (string)

 *

 * Must be in the form of 'key=comment' or

 * 'key[lc]=comment' where 'lc' is an ISO-639

 * language code.

 *

 * This tag is used for unknown Vorbis comment tags,

 * unknown APE tags and certain ID3v2 comment fields.

 */

#define GST_TAG_EXTENDED_COMMENT       "extended-comment"

/**

 * GST_TAG_TRACK_NUMBER:

 *

 * track number inside a collection (unsigned integer)

 */

#define GST_TAG_TRACK_NUMBER           "track-number"

/**

 * GST_TAG_TRACK_COUNT:

 *

 * count of tracks inside collection this track belongs to (unsigned integer)

 */

#define GST_TAG_TRACK_COUNT            "track-count"

/**

 * GST_TAG_ALBUM_VOLUME_NUMBER:

 *

 * disc number inside a collection (unsigned integer)

 */

#define GST_TAG_ALBUM_VOLUME_NUMBER    "album-disc-number"

/**

 * GST_TAG_ALBUM_VOLUME_COUNT:

 *

 * count of discs inside collection this disc belongs to (unsigned integer)

 */

#define GST_TAG_ALBUM_VOLUME_COUNT    "album-disc-count"

/**

 * GST_TAG_LOCATION:

 *

 * Origin of media as a URI (location, where the original of the file or stream

 * is hosted) (string)

 */

#define GST_TAG_LOCATION               "location"

/**

 * GST_TAG_HOMEPAGE:

 *

 * Homepage for this media (i.e. artist or movie homepage) (string)

 */

#define GST_TAG_HOMEPAGE               "homepage"

/**

 * GST_TAG_DESCRIPTION:

 *

 * short text describing the content of the data (string)

 */

#define GST_TAG_DESCRIPTION            "description"

/**

 * GST_TAG_VERSION:

 *

 * version of this data (string)

 */

#define GST_TAG_VERSION                "version"

/**

 * GST_TAG_ISRC:

 *

 * International Standard Recording Code - see http://www.ifpi.org/isrc/ (string)

 */

#define GST_TAG_ISRC                   "isrc"

/**

 * GST_TAG_ORGANIZATION:

 *

 * organization (string)

 */

#define GST_TAG_ORGANIZATION           "organization"

/**

 * GST_TAG_COPYRIGHT:

 *

 * copyright notice of the data (string)

 */

#define GST_TAG_COPYRIGHT              "copyright"

/**

 * GST_TAG_COPYRIGHT_URI:

 *

 * URI to location where copyright details can be found (string)

 */

#define GST_TAG_COPYRIGHT_URI          "copyright-uri"

/**

 * GST_TAG_ENCODED_BY:

 *

 * name of the person or organisation that encoded the file. May contain a

 * copyright message if the person or organisation also holds the copyright

 * (string)

 *

 * Note: do not use this field to describe the encoding application. Use

 * #GST_TAG_APPLICATION_NAME or #GST_TAG_COMMENT for that.

 */

#define GST_TAG_ENCODED_BY             "encoded-by"

/**

 * GST_TAG_CONTACT:

 *

 * contact information (string)

 */

#define GST_TAG_CONTACT                "contact"

/**

 * GST_TAG_LICENSE:

 *

 * license of data (string)

 */

#define GST_TAG_LICENSE                "license"

/**

 * GST_TAG_LICENSE_URI:

 *

 * URI to location where license details can be found (string)

 */

#define GST_TAG_LICENSE_URI            "license-uri"

/**

 * GST_TAG_PERFORMER:

 *

 * person(s) performing (string)

 */

#define GST_TAG_PERFORMER              "performer"

/**

 * GST_TAG_DURATION:

 *

 * length in GStreamer time units (nanoseconds) (unsigned 64-bit integer)

 */

#define GST_TAG_DURATION               "duration"

/**

 * GST_TAG_CODEC:

 *

 * codec the data is stored in (string)

 */

#define GST_TAG_CODEC                  "codec"

/**

 * GST_TAG_VIDEO_CODEC:

 *

 * codec the video data is stored in (string)

 */

#define GST_TAG_VIDEO_CODEC            "video-codec"

/**

 * GST_TAG_AUDIO_CODEC:

 *

 * codec the audio data is stored in (string)

 */

#define GST_TAG_AUDIO_CODEC            "audio-codec"

/**

 * GST_TAG_SUBTITLE_CODEC:

 *

 * codec/format the subtitle data is stored in (string)

 */

#define GST_TAG_SUBTITLE_CODEC         "subtitle-codec"

/**

 * GST_TAG_CONTAINER_FORMAT:

 *

 * container format the data is stored in (string)

 */

#define GST_TAG_CONTAINER_FORMAT       "container-format"

/**

 * GST_TAG_BITRATE:

 *

 * exact or average bitrate in bits/s (unsigned integer)

 */

#define GST_TAG_BITRATE                "bitrate"

/**

 * GST_TAG_NOMINAL_BITRATE:

 *

 * nominal bitrate in bits/s (unsigned integer). The actual bitrate might be

 * different from this target bitrate.

 */

#define GST_TAG_NOMINAL_BITRATE        "nominal-bitrate"

/**

 * GST_TAG_MINIMUM_BITRATE:

 *

 * minimum bitrate in bits/s (unsigned integer)

 */

#define GST_TAG_MINIMUM_BITRATE        "minimum-bitrate"

/**

 * GST_TAG_MAXIMUM_BITRATE:

 *

 * maximum bitrate in bits/s (unsigned integer)

 */

#define GST_TAG_MAXIMUM_BITRATE        "maximum-bitrate"

/**

 * GST_TAG_SERIAL:

 *

 * serial number of track (unsigned integer)

 */

#define GST_TAG_SERIAL                 "serial"

/**

 * GST_TAG_ENCODER:

 *

 * encoder used to encode this stream (string)

 */

#define GST_TAG_ENCODER                "encoder"

/**

 * GST_TAG_ENCODER_VERSION:

 *

 * version of the encoder used to encode this stream (unsigned integer)

 */

#define GST_TAG_ENCODER_VERSION        "encoder-version"

/**

 * GST_TAG_TRACK_GAIN:

 *

 * track gain in db (double)

 */

#define GST_TAG_TRACK_GAIN             "replaygain-track-gain"

/**

 * GST_TAG_TRACK_PEAK:

 *

 * peak of the track (double)

 */

#define GST_TAG_TRACK_PEAK             "replaygain-track-peak"

/**

 * GST_TAG_ALBUM_GAIN:

 *

 * album gain in db (double)

 */

#define GST_TAG_ALBUM_GAIN             "replaygain-album-gain"

/**

 * GST_TAG_ALBUM_PEAK:

 *

 * peak of the album (double)

 */

#define GST_TAG_ALBUM_PEAK             "replaygain-album-peak"

/**

 * GST_TAG_REFERENCE_LEVEL:

 *

 * reference level of track and album gain values (double)

 */

#define GST_TAG_REFERENCE_LEVEL        "replaygain-reference-level"

/**

 * GST_TAG_LANGUAGE_CODE:

 *

 * ISO-639-2 or ISO-639-1 code for the language the content is in (string)

 *

 * There is utility API in libgsttag in gst-plugins-base to obtain a translated

 * language name from the language code: gst_tag_get_language_name()

 */

#define GST_TAG_LANGUAGE_CODE          "language-code"

/**

 * GST_TAG_LANGUAGE_NAME:

 *

 * Name of the language the content is in (string)