- public bool check_language_code (string lang_code)
Check if a given string contains a known ISO 639 language code.
- public string freeform_string_to_utf8 (char[] data, string[] env_vars)
Convenience function to read a string with unknown character
encoding.
- public unowned string from_id3_tag (string id3_tag)
Looks up the GStreamer tag for a ID3v2 tag.
- public unowned string from_id3_user_tag (string type, string id3_user_tag)
Looks up the GStreamer tag for an ID3v2 user tag (e.g. description
in TXXX frame or owner in UFID frame).
- public unowned string from_vorbis_tag (string vorbis_tag)
Looks up the GStreamer tag for a vorbiscomment tag.
- public uint get_id3v2_tag_size (Buffer buffer)
Determines size of an ID3v2 tag on buffer containing at least ID3v2
header, i.e. at least ID3V2_HEADER_SIZE (10) bytes;
- public unowned string get_language_code_iso_639_1 (string lang_code)
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).
- public unowned string get_language_code_iso_639_2B (string lang_code)
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).
- public unowned string get_language_code_iso_639_2T (string lang_code)
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).
- public string[] get_language_codes ()
Returns a list of known language codes (in form of two-letter
ISO-639-1 codes).
- public unowned string get_language_name (string language_code)
Returns the name of the language given an ISO-639 language code as
found in a GST_TAG_LANGUAGE_CODE tag.
- public unowned string get_license_description (string license_ref)
Get the description of a license, which is a translated description
of the license's main features.
- public LicenseFlags get_license_flags (string license_ref)
Get the flags of a license, which describe most of the features of a
license in their most general form.
- public unowned string get_license_jurisdiction (string license_ref)
Get the jurisdiction code of a license.
- public unowned string get_license_nick (string license_ref)
Get the nick name of a license, which is a short (untranslated)
string such as e.g. "CC BY-NC-ND 2.0 UK".
- public unowned string get_license_title (string license_ref)
Get the title of a license, which is a short translated description
of the license's features (generally not very pretty though).
- public unowned string get_license_version (string license_ref)
Get the version of a license.
- public string[] get_licenses ()
Returns a list of known license references (in form of URIs).
- public uint id3_genre_count ()
Gets the number of ID3v1 genres that can be identified.
- public unowned string id3_genre_get (uint id)
Gets the ID3v1 genre name for a given ID.
- public Sample image_data_to_image_sample (uint8[] image_data, ImageType image_type)
Helper function for tag-reading plugins to create a
Sample suitable to add to a TagList as an image tag (such as
IMAGE or PREVIEW_IMAGE) from the encoded image data and an (optional)
image type.
- public bool parse_extended_comment (string ext_comment, out string? key, out string? lang, out string value, bool fail_if_no_key)
Convenience function to parse a GST_TAG_EXTENDED_COMMENT string and
separate it into its components.
- public void register_musicbrainz_tags ()
Registers additional musicbrainz-specific tags with the GStreamer
tag system.
- public unowned string to_id3_tag (string gst_tag)
Looks up the ID3v2 tag for a GStreamer tag.
- public List<string> to_vorbis_comments (TagList list, string tag)
Creates a new tag list that contains the information parsed out of a
vorbiscomment packet.
- public unowned string to_vorbis_tag (string gst_tag)
Looks up the vorbiscomment tag for a GStreamer tag.
- public void vorbis_tag_add (TagList list, string tag, string value)
Convenience function using
from_vorbis_tag, parsing a vorbis comment string into the right type and
adding it to the given taglist list.
- public unowned string[] xmp_list_schemas ()
Gets the list of supported schemas in the xmp lib
- public const string CONTRAST
Direction of contrast processing applied when capturing an image.
- public const string DIGITAL_ZOOM_RATIO
Digital zoom ratio used when capturing an image.
- public const string EXPOSURE_COMPENSATION
Exposure compensation using when capturing an image in EV.
- public const string EXPOSURE_MODE
Exposure mode used when capturing an image.
- public const string EXPOSURE_PROGRAM
Type of exposure control used when capturing an image.
- public const string FLASH_FIRED
If flash was fired during the capture of an image.
- public const string FLASH_MODE
The flash mode selected during the capture of an image.
- public const string FOCAL_LENGTH
Focal length used when capturing an image, in mm.
- public const string FOCAL_LENGTH_35_MM
35 mm equivalent focal length used when capturing an image, in mm.
- public const string FOCAL_RATIO
Focal ratio (f-number) used when capturing an image.
- public const string GAIN_ADJUSTMENT
Gain adjustment applied to an image.
- public const string ISO_SPEED
ISO speed used when capturing an image.
- public const string METERING_MODE
Defines the way a camera determines the exposure.
- public const string SATURATION
Direction of saturation processing applied when capturing an image.
- public const string SCENE_CAPTURE_TYPE
Scene mode used when capturing an image.
- public const string SHARPNESS
Direction of sharpness processing applied when capturing an image.
- public const string SHUTTER_SPEED
Shutter speed used when capturing an image, in seconds.
- public const string SOURCE
Indicates the source of capture.
- public const string WHITE_BALANCE
White balance mode used when capturing an image.
- public bool add_id3_image (TagList tag_list, uint8[] image_data, uint id3_picture_type)
Adds an image from an ID3 APIC frame (or similar, such as used in
FLAC) to the given tag list.
- public TagList from_exif_buffer (Buffer buffer, int byte_order, uint32 base_offset)
Parses the IFD and IFD tags data contained in the buffer and puts it
on a taglist.
- public TagList from_exif_buffer_with_tiff_header (Buffer buffer)
Parses the exif tags starting with a tiff header structure.
- public TagList from_id3v2_tag (Buffer buffer)
Creates a new tag list that contains the information parsed out of a
ID3 tag.
- public TagList from_vorbiscomment (uint8[] data, uint8[] id_data, out string vendor_string)
Creates a new tag list that contains the information parsed out of a
vorbiscomment packet.
- public TagList from_vorbiscomment_buffer (Buffer buffer, uint8[] id_data, out string vendor_string)
Creates a new tag list that contains the information parsed out of a
vorbiscomment packet.
- public TagList from_xmp_buffer (Buffer buffer)
Parse a xmp packet into a taglist.
- public TagList new_from_id3v1 (uint8[] data)
Parses the data containing an ID3v1 tag and returns a
TagList from the parsed data.
- public Buffer to_exif_buffer (TagList taglist, int byte_order, uint32 base_offset)
Formats the tags in taglist on exif format.
- public Buffer to_exif_buffer_with_tiff_header (TagList taglist)
Formats the tags in taglist into exif structure, a tiff header is
put in the beginning of the buffer.
- public Buffer to_vorbiscomment_buffer (TagList list, uint8[] id_data, string? vendor_string)
Creates a new vorbiscomment buffer from a tag list.
- public Buffer to_xmp_buffer (TagList list, bool read_only, string[] schemas)
Formats a taglist as a xmp packet using only the selected schemas.