2 * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
4 * gsttaglist.h: Header for tag support
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
23 #ifndef __GST_TAGLIST_H__
24 #define __GST_TAGLIST_H__
26 #include <gst/gstdatetime.h>
27 #include <gst/gstsample.h>
28 #include <gst/gstbuffer.h>
29 #include <gst/glib-compat.h>
35 * @GST_TAG_MERGE_UNDEFINED: undefined merge mode
36 * @GST_TAG_MERGE_REPLACE_ALL: replace all tags (clear list and append)
37 * @GST_TAG_MERGE_REPLACE: replace tags
38 * @GST_TAG_MERGE_APPEND: append tags
39 * @GST_TAG_MERGE_PREPEND: prepend tags
40 * @GST_TAG_MERGE_KEEP: keep existing tags
41 * @GST_TAG_MERGE_KEEP_ALL: keep all existing tags
42 * @GST_TAG_MERGE_COUNT: the number of merge modes
44 * The different tag merging modes are basically replace, overwrite and append,
45 * but they can be seen from two directions. Given two taglists: (A) the tags
46 * already in the element and (B) the ones that are supplied to the element (
47 * e.g. via gst_tag_setter_merge_tags() / gst_tag_setter_add_tags() or a
48 * %GST_EVENT_TAG), how are these tags merged?
49 * In the table below this is shown for the cases that a tag exists in the list
50 * (A) or does not exists (!A) and combinations thereof.
52 * <table frame="all" colsep="1" rowsep="1">
53 * <title>merge mode</title>
54 * <tgroup cols='5' align='left'>
57 * <entry>merge mode</entry>
58 * <entry>A + B</entry>
59 * <entry>A + !B</entry>
60 * <entry>!A + B</entry>
61 * <entry>!A + !B</entry>
66 * <entry>REPLACE_ALL</entry>
73 * <entry>REPLACE</entry>
80 * <entry>APPEND</entry>
87 * <entry>PREPEND</entry>
101 * <entry>KEEP_ALL</entry>
112 GST_TAG_MERGE_UNDEFINED,
113 GST_TAG_MERGE_REPLACE_ALL,
114 GST_TAG_MERGE_REPLACE,
115 GST_TAG_MERGE_APPEND,
116 GST_TAG_MERGE_PREPEND,
118 GST_TAG_MERGE_KEEP_ALL,
123 #define GST_TAG_MODE_IS_VALID(mode) (((mode) > GST_TAG_MERGE_UNDEFINED) && ((mode) < GST_TAG_MERGE_COUNT))
127 * @GST_TAG_FLAG_UNDEFINED: undefined flag
128 * @GST_TAG_FLAG_META: tag is meta data
129 * @GST_TAG_FLAG_ENCODED: tag is encoded
130 * @GST_TAG_FLAG_DECODED: tag is decoded
131 * @GST_TAG_FLAG_COUNT: number of tag flags
133 * Extra tag flags used when registering tags.
136 GST_TAG_FLAG_UNDEFINED,
138 GST_TAG_FLAG_ENCODED,
139 GST_TAG_FLAG_DECODED,
143 #define GST_TAG_FLAG_IS_VALID(flag) (((flag) > GST_TAG_FLAG_UNDEFINED) && ((flag) < GST_TAG_FLAG_COUNT))
148 * Opaque #GstTagList data structure.
150 typedef struct _GstTagList GstTagList;
152 #define GST_TAG_LIST(x) ((GstTagList *) (x))
153 #define GST_IS_TAG_LIST(x) ((x) != NULL && gst_is_tag_list (GST_TAG_LIST (x)))
154 #define GST_TYPE_TAG_LIST (gst_tag_list_get_type ())
158 * @list: the #GstTagList
159 * @tag: a name of a tag in @list
160 * @user_data: user data
162 * A function that will be called in gst_tag_list_foreach(). The function may
163 * not modify the tag list.
165 typedef void (*GstTagForeachFunc) (const GstTagList * list,
171 * @dest: the destination #GValue
172 * @src: the source #GValue
174 * A function for merging multiple values of a tag used when registering
177 typedef void (* GstTagMergeFunc) (GValue *dest, const GValue *src);
179 GType gst_tag_list_get_type (void);
181 /* tag registration */
182 void gst_tag_register (const gchar * name,
187 GstTagMergeFunc func);
189 /* some default merging functions */
190 void gst_tag_merge_use_first (GValue * dest, const GValue * src);
191 void gst_tag_merge_strings_with_comma (GValue * dest, const GValue * src);
193 /* basic tag support */
194 gboolean gst_tag_exists (const gchar * tag);
195 GType gst_tag_get_type (const gchar * tag);
196 const gchar * gst_tag_get_nick (const gchar * tag);
197 const gchar * gst_tag_get_description (const gchar * tag);
198 GstTagFlag gst_tag_get_flag (const gchar * tag);
199 gboolean gst_tag_is_fixed (const gchar * tag);
202 GstTagList * gst_tag_list_new_empty (void) G_GNUC_MALLOC;
203 GstTagList * gst_tag_list_new (const gchar * tag, ...) G_GNUC_MALLOC;
204 GstTagList * gst_tag_list_new_valist (va_list var_args) G_GNUC_MALLOC;
206 gchar * gst_tag_list_to_string (const GstTagList * list) G_GNUC_MALLOC;
207 GstTagList * gst_tag_list_new_from_string (const gchar * str) G_GNUC_MALLOC;
209 gboolean gst_is_tag_list (gconstpointer p);
210 GstTagList * gst_tag_list_copy (const GstTagList * list) G_GNUC_MALLOC;
211 gboolean gst_tag_list_is_empty (const GstTagList * list);
212 gboolean gst_tag_list_is_equal (const GstTagList * list1,
213 const GstTagList * list2);
214 void gst_tag_list_insert (GstTagList * into,
215 const GstTagList * from,
216 GstTagMergeMode mode);
217 GstTagList * gst_tag_list_merge (const GstTagList * list1,
218 const GstTagList * list2,
219 GstTagMergeMode mode) G_GNUC_MALLOC;
220 void gst_tag_list_free (GstTagList * list);
221 guint gst_tag_list_get_tag_size (const GstTagList * list,
223 void gst_tag_list_add (GstTagList * list,
224 GstTagMergeMode mode,
226 ...) G_GNUC_NULL_TERMINATED;
227 void gst_tag_list_add_values (GstTagList * list,
228 GstTagMergeMode mode,
230 ...) G_GNUC_NULL_TERMINATED;
231 void gst_tag_list_add_valist (GstTagList * list,
232 GstTagMergeMode mode,
235 void gst_tag_list_add_valist_values (GstTagList * list,
236 GstTagMergeMode mode,
239 void gst_tag_list_add_value (GstTagList * list,
240 GstTagMergeMode mode,
242 const GValue * value);
243 void gst_tag_list_remove_tag (GstTagList * list,
245 void gst_tag_list_foreach (const GstTagList * list,
246 GstTagForeachFunc func,
250 gst_tag_list_get_value_index (const GstTagList * list,
253 gboolean gst_tag_list_copy_value (GValue * dest,
254 const GstTagList * list,
257 /* simplifications (FIXME: do we want them?) */
258 gboolean gst_tag_list_get_char (const GstTagList * list,
261 gboolean gst_tag_list_get_char_index (const GstTagList * list,
265 gboolean gst_tag_list_get_uchar (const GstTagList * list,
268 gboolean gst_tag_list_get_uchar_index (const GstTagList * list,
272 gboolean gst_tag_list_get_boolean (const GstTagList * list,
275 gboolean gst_tag_list_get_boolean_index (const GstTagList * list,
279 gboolean gst_tag_list_get_int (const GstTagList * list,
282 gboolean gst_tag_list_get_int_index (const GstTagList * list,
286 gboolean gst_tag_list_get_uint (const GstTagList * list,
289 gboolean gst_tag_list_get_uint_index (const GstTagList * list,
293 gboolean gst_tag_list_get_int64 (const GstTagList * list,
296 gboolean gst_tag_list_get_int64_index (const GstTagList * list,
300 gboolean gst_tag_list_get_uint64 (const GstTagList * list,
303 gboolean gst_tag_list_get_uint64_index (const GstTagList * list,
307 gboolean gst_tag_list_get_float (const GstTagList * list,
310 gboolean gst_tag_list_get_float_index (const GstTagList * list,
314 gboolean gst_tag_list_get_double (const GstTagList * list,
317 gboolean gst_tag_list_get_double_index (const GstTagList * list,
321 gboolean gst_tag_list_get_string (const GstTagList * list,
324 gboolean gst_tag_list_get_string_index (const GstTagList * list,
328 gboolean gst_tag_list_peek_string_index (const GstTagList * list,
331 const gchar ** value);
332 gboolean gst_tag_list_get_pointer (const GstTagList * list,
335 gboolean gst_tag_list_get_pointer_index (const GstTagList * list,
339 gboolean gst_tag_list_get_date (const GstTagList * list,
342 gboolean gst_tag_list_get_date_index (const GstTagList * list,
346 gboolean gst_tag_list_get_date_time (const GstTagList * list,
348 GstDateTime ** value);
349 gboolean gst_tag_list_get_date_time_index (const GstTagList * list,
352 GstDateTime ** value);
353 gboolean gst_tag_list_get_buffer (const GstTagList * list,
356 gboolean gst_tag_list_get_buffer_index (const GstTagList * list,
361 /* GStreamer core tags */
365 * commonly used title (string)
367 * The title as it should be displayed, e.g. 'The Doll House'
369 #define GST_TAG_TITLE "title"
371 * GST_TAG_TITLE_SORTNAME:
373 * commonly used title, as used for sorting (string)
375 * The title as it should be sorted, e.g. 'Doll House, The'
379 #define GST_TAG_TITLE_SORTNAME "title-sortname"
383 * person(s) responsible for the recording (string)
385 * The artist name as it should be displayed, e.g. 'Jimi Hendrix' or
386 * 'The Guitar Heroes'
388 #define GST_TAG_ARTIST "artist"
390 * GST_TAG_ARTIST_SORTNAME:
392 * person(s) responsible for the recording, as used for sorting (string)
394 * The artist name as it should be sorted, e.g. 'Hendrix, Jimi' or
395 * 'Guitar Heroes, The'
399 #define GST_TAG_ARTIST_SORTNAME "artist-sortname"
403 * album containing this data (string)
405 * The album name as it should be displayed, e.g. 'The Jazz Guitar'
407 #define GST_TAG_ALBUM "album"
409 * GST_TAG_ALBUM_SORTNAME:
411 * album containing this data, as used for sorting (string)
413 * The album name as it should be sorted, e.g. 'Jazz Guitar, The'
417 #define GST_TAG_ALBUM_SORTNAME "album-sortname"
419 * GST_TAG_ALBUM_ARTIST:
421 * The artist of the entire album, as it should be displayed.
425 #define GST_TAG_ALBUM_ARTIST "album-artist"
427 * GST_TAG_ALBUM_ARTIST_SORTNAME:
429 * The artist of the entire album, as it should be sorted.
433 #define GST_TAG_ALBUM_ARTIST_SORTNAME "album-artist-sortname"
437 * person(s) who composed the recording (string)
441 #define GST_TAG_COMPOSER "composer"
445 * date the data was created (#GDate structure)
447 #define GST_TAG_DATE "date"
451 * date and time the data was created (#GstDateTime structure)
455 #define GST_TAG_DATE_TIME "datetime"
459 * genre this data belongs to (string)
461 #define GST_TAG_GENRE "genre"
465 * free text commenting the data (string)
467 #define GST_TAG_COMMENT "comment"
469 * GST_TAG_EXTENDED_COMMENT:
471 * key/value text commenting the data (string)
473 * Must be in the form of 'key=comment' or
474 * 'key[lc]=comment' where 'lc' is an ISO-639
477 * This tag is used for unknown Vorbis comment tags,
478 * unknown APE tags and certain ID3v2 comment fields.
482 #define GST_TAG_EXTENDED_COMMENT "extended-comment"
484 * GST_TAG_TRACK_NUMBER:
486 * track number inside a collection (unsigned integer)
488 #define GST_TAG_TRACK_NUMBER "track-number"
490 * GST_TAG_TRACK_COUNT:
492 * count of tracks inside collection this track belongs to (unsigned integer)
494 #define GST_TAG_TRACK_COUNT "track-count"
496 * GST_TAG_ALBUM_VOLUME_NUMBER:
498 * disc number inside a collection (unsigned integer)
500 #define GST_TAG_ALBUM_VOLUME_NUMBER "album-disc-number"
502 * GST_TAG_ALBUM_VOLUME_COUNT:
504 * count of discs inside collection this disc belongs to (unsigned integer)
506 #define GST_TAG_ALBUM_VOLUME_COUNT "album-disc-count"
510 * Origin of media as a URI (location, where the original of the file or stream
511 * is hosted) (string)
513 #define GST_TAG_LOCATION "location"
517 * Homepage for this media (i.e. artist or movie homepage) (string)
521 #define GST_TAG_HOMEPAGE "homepage"
523 * GST_TAG_DESCRIPTION:
525 * short text describing the content of the data (string)
527 #define GST_TAG_DESCRIPTION "description"
531 * version of this data (string)
533 #define GST_TAG_VERSION "version"
537 * International Standard Recording Code - see http://www.ifpi.org/isrc/ (string)
539 #define GST_TAG_ISRC "isrc"
541 * GST_TAG_ORGANIZATION:
543 * organization (string)
545 #define GST_TAG_ORGANIZATION "organization"
549 * copyright notice of the data (string)
551 #define GST_TAG_COPYRIGHT "copyright"
553 * GST_TAG_COPYRIGHT_URI:
555 * URI to location where copyright details can be found (string)
559 #define GST_TAG_COPYRIGHT_URI "copyright-uri"
561 * GST_TAG_ENCODED_BY:
563 * name of the person or organisation that encoded the file. May contain a
564 * copyright message if the person or organisation also holds the copyright
567 * Note: do not use this field to describe the encoding application. Use
568 * #GST_TAG_APPLICATION_NAME or #GST_TAG_COMMENT for that.
572 #define GST_TAG_ENCODED_BY "encoded-by"
576 * contact information (string)
578 #define GST_TAG_CONTACT "contact"
582 * license of data (string)
584 #define GST_TAG_LICENSE "license"
586 * GST_TAG_LICENSE_URI:
588 * URI to location where license details can be found (string)
592 #define GST_TAG_LICENSE_URI "license-uri"
596 * person(s) performing (string)
598 #define GST_TAG_PERFORMER "performer"
602 * length in GStreamer time units (nanoseconds) (unsigned 64-bit integer)
604 #define GST_TAG_DURATION "duration"
608 * codec the data is stored in (string)
610 #define GST_TAG_CODEC "codec"
612 * GST_TAG_VIDEO_CODEC:
614 * codec the video data is stored in (string)
616 #define GST_TAG_VIDEO_CODEC "video-codec"
618 * GST_TAG_AUDIO_CODEC:
620 * codec the audio data is stored in (string)
622 #define GST_TAG_AUDIO_CODEC "audio-codec"
624 * GST_TAG_SUBTITLE_CODEC:
626 * codec/format the subtitle data is stored in (string)
630 #define GST_TAG_SUBTITLE_CODEC "subtitle-codec"
632 * GST_TAG_CONTAINER_FORMAT:
634 * container format the data is stored in (string)
638 #define GST_TAG_CONTAINER_FORMAT "container-format"
642 * exact or average bitrate in bits/s (unsigned integer)
644 #define GST_TAG_BITRATE "bitrate"
646 * GST_TAG_NOMINAL_BITRATE:
648 * nominal bitrate in bits/s (unsigned integer). The actual bitrate might be
649 * different from this target bitrate.
651 #define GST_TAG_NOMINAL_BITRATE "nominal-bitrate"
653 * GST_TAG_MINIMUM_BITRATE:
655 * minimum bitrate in bits/s (unsigned integer)
657 #define GST_TAG_MINIMUM_BITRATE "minimum-bitrate"
659 * GST_TAG_MAXIMUM_BITRATE:
661 * maximum bitrate in bits/s (unsigned integer)
663 #define GST_TAG_MAXIMUM_BITRATE "maximum-bitrate"
667 * serial number of track (unsigned integer)
669 #define GST_TAG_SERIAL "serial"
673 * encoder used to encode this stream (string)
675 #define GST_TAG_ENCODER "encoder"
677 * GST_TAG_ENCODER_VERSION:
679 * version of the encoder used to encode this stream (unsigned integer)
681 #define GST_TAG_ENCODER_VERSION "encoder-version"
683 * GST_TAG_TRACK_GAIN:
685 * track gain in db (double)
687 #define GST_TAG_TRACK_GAIN "replaygain-track-gain"
689 * GST_TAG_TRACK_PEAK:
691 * peak of the track (double)
693 #define GST_TAG_TRACK_PEAK "replaygain-track-peak"
695 * GST_TAG_ALBUM_GAIN:
697 * album gain in db (double)
699 #define GST_TAG_ALBUM_GAIN "replaygain-album-gain"
701 * GST_TAG_ALBUM_PEAK:
703 * peak of the album (double)
705 #define GST_TAG_ALBUM_PEAK "replaygain-album-peak"
707 * GST_TAG_REFERENCE_LEVEL:
709 * reference level of track and album gain values (double)
713 #define GST_TAG_REFERENCE_LEVEL "replaygain-reference-level"
715 * GST_TAG_LANGUAGE_CODE:
717 * Language code (ISO-639-1) (string) of the content
719 #define GST_TAG_LANGUAGE_CODE "language-code"
723 * image (sample) (sample caps should specify the content type and preferably
724 * also set "image-type" field as #GstTagImageType)
728 #define GST_TAG_IMAGE "image"
730 * GST_TAG_PREVIEW_IMAGE:
732 * image that is meant for preview purposes, e.g. small icon-sized version
733 * (sample) (sample caps should specify the content type)
737 #define GST_TAG_PREVIEW_IMAGE "preview-image"
740 * GST_TAG_ATTACHMENT:
742 * generic file attachment (sample) (sample caps should specify the content
743 * type and if possible set "filename" to the file name of the
748 #define GST_TAG_ATTACHMENT "attachment"
751 * GST_TAG_BEATS_PER_MINUTE:
753 * number of beats per minute in audio (double)
757 #define GST_TAG_BEATS_PER_MINUTE "beats-per-minute"
762 * comma separated keywords describing the content (string).
766 #define GST_TAG_KEYWORDS "keywords"
769 * GST_TAG_GEO_LOCATION_NAME:
771 * human readable descriptive location of where the media has been recorded or
772 * produced. (string).
776 #define GST_TAG_GEO_LOCATION_NAME "geo-location-name"
779 * GST_TAG_GEO_LOCATION_LATITUDE:
781 * geo latitude location of where the media has been recorded or produced in
782 * degrees according to WGS84 (zero at the equator, negative values for southern
783 * latitudes) (double).
787 #define GST_TAG_GEO_LOCATION_LATITUDE "geo-location-latitude"
790 * GST_TAG_GEO_LOCATION_LONGITUDE:
792 * geo longitude location of where the media has been recorded or produced in
793 * degrees according to WGS84 (zero at the prime meridian in Greenwich/UK,
794 * negative values for western longitudes). (double).
798 #define GST_TAG_GEO_LOCATION_LONGITUDE "geo-location-longitude"
801 * GST_TAG_GEO_LOCATION_ELEVATION:
803 * geo elevation of where the media has been recorded or produced in meters
804 * according to WGS84 (zero is average sea level) (double).
808 #define GST_TAG_GEO_LOCATION_ELEVATION "geo-location-elevation"
810 * GST_TAG_GEO_LOCATION_COUNTRY:
812 * The country (english name) where the media has been produced (string).
816 #define GST_TAG_GEO_LOCATION_COUNTRY "geo-location-country"
818 * GST_TAG_GEO_LOCATION_CITY:
820 * The city (english name) where the media has been produced (string).
824 #define GST_TAG_GEO_LOCATION_CITY "geo-location-city"
826 * GST_TAG_GEO_LOCATION_SUBLOCATION:
828 * A location 'smaller' than GST_TAG_GEO_LOCATION_CITY that specifies better
829 * where the media has been produced. (e.g. the neighborhood) (string).
831 * This tag has been added as this is how it is handled/named in XMP's
832 * Iptc4xmpcore schema.
836 #define GST_TAG_GEO_LOCATION_SUBLOCATION "geo-location-sublocation"
838 * GST_TAG_GEO_LOCATION_HORIZONTAL_ERROR:
840 * Represents the expected error on the horizontal positioning in
845 #define GST_TAG_GEO_LOCATION_HORIZONTAL_ERROR "geo-location-horizontal-error"
847 * GST_TAG_GEO_LOCATION_MOVEMENT_SPEED:
849 * Speed of the capturing device when performing the capture.
850 * Represented in m/s. (double)
852 * See also #GST_TAG_GEO_LOCATION_MOVEMENT_DIRECTION
856 #define GST_TAG_GEO_LOCATION_MOVEMENT_SPEED "geo-location-movement-speed"
858 * GST_TAG_GEO_LOCATION_MOVEMENT_DIRECTION:
860 * Indicates the movement direction of the device performing the capture
861 * of a media. It is represented as degrees in floating point representation,
862 * 0 means the geographic north, and increases clockwise (double from 0 to 360)
864 * See also #GST_TAG_GEO_LOCATION_CAPTURE_DIRECTION
868 #define GST_TAG_GEO_LOCATION_MOVEMENT_DIRECTION "geo-location-movement-direction"
870 * GST_TAG_GEO_LOCATION_CAPTURE_DIRECTION:
872 * Indicates the direction the device is pointing to when capturing
873 * a media. It is represented as degrees in floating point representation,
874 * 0 means the geographic north, and increases clockwise (double from 0 to 360)
876 * See also #GST_TAG_GEO_LOCATION_MOVEMENT_DIRECTION
880 #define GST_TAG_GEO_LOCATION_CAPTURE_DIRECTION "geo-location-capture-direction"
884 * Name of the show, used for displaying (string)
888 #define GST_TAG_SHOW_NAME "show-name"
890 * GST_TAG_SHOW_SORTNAME:
892 * Name of the show, used for sorting (string)
896 #define GST_TAG_SHOW_SORTNAME "show-sortname"
898 * GST_TAG_SHOW_EPISODE_NUMBER:
900 * Number of the episode within a season/show (unsigned integer)
904 #define GST_TAG_SHOW_EPISODE_NUMBER "show-episode-number"
906 * GST_TAG_SHOW_SEASON_NUMBER:
908 * Number of the season of a show/series (unsigned integer)
912 #define GST_TAG_SHOW_SEASON_NUMBER "show-season-number"
916 * The lyrics of the media (string)
920 #define GST_TAG_LYRICS "lyrics"
922 * GST_TAG_COMPOSER_SORTNAME:
924 * The composer's name, used for sorting (string)
928 #define GST_TAG_COMPOSER_SORTNAME "composer-sortname"
932 * Groups together media that are related and spans multiple tracks. An
933 * example are multiple pieces of a concerto. (string)
937 #define GST_TAG_GROUPING "grouping"
939 * GST_TAG_USER_RATING:
941 * Rating attributed by a person (likely the application user).
942 * The higher the value, the more the user likes this media
943 * (unsigned int from 0 to 100)
947 #define GST_TAG_USER_RATING "user-rating"
949 * GST_TAG_DEVICE_MANUFACTURER:
951 * Manufacturer of the device used to create the media (string)
955 #define GST_TAG_DEVICE_MANUFACTURER "device-manufacturer"
957 * GST_TAG_DEVICE_MODEL:
959 * Model of the device used to create the media (string)
963 #define GST_TAG_DEVICE_MODEL "device-model"
965 * GST_TAG_APPLICATION_NAME:
967 * Name of the application used to create the media (string)
971 #define GST_TAG_APPLICATION_NAME "application-name"
973 * GST_TAG_APPLICATION_DATA:
975 * Arbitrary application data (buffer)
977 * Some formats allow application's to add their own arbitrary data
978 * into files. This data is application's dependent.
982 #define GST_TAG_APPLICATION_DATA "application-data"
984 * GST_TAG_IMAGE_ORIENTATION:
986 * Represents the 'Orientation' tag from EXIF. Defines how the image
987 * should be rotated and mirrored for display. (string)
989 * This tag has a predefined set of allowed values:
999 * The naming is adopted according to a possible transformation to perform
1000 * on the image to fix its orientation, obviously equivalent operations will
1001 * yield the same result.
1003 * Rotations indicated by the values are in clockwise direction and
1004 * 'flip' means an horizontal mirroring.
1008 #define GST_TAG_IMAGE_ORIENTATION "image-orientation"
1012 #endif /* __GST_TAGLIST_H__ */