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/* Copyright 2016 Software Freedom Conservancy Inc.
*
* This software is licensed under the GNU LGPL (version 2.1 or later).
* See the COPYING file in this distribution.
*/
class HeifFileFormatProperties : PhotoFileFormatProperties {
private static string[] KNOWN_EXTENSIONS = { "heif", "heic", "hif" };
private static string[] KNOWN_MIME_TYPES = { "image/heif" };
private static HeifFileFormatProperties instance = null;
public static void init() {
instance = new HeifFileFormatProperties();
}
public static HeifFileFormatProperties get_instance() {
return instance;
}
public override PhotoFileFormat get_file_format() {
return PhotoFileFormat.HEIF;
}
public override PhotoFileFormatFlags get_flags() {
return PhotoFileFormatFlags.NONE;
}
public override string get_user_visible_name() {
return _("HEIF");
}
public override string get_default_extension() {
return KNOWN_EXTENSIONS[0];
}
public override string[] get_known_extensions() {
return KNOWN_EXTENSIONS;
}
public override string get_default_mime_type() {
return KNOWN_MIME_TYPES[0];
}
public override string[] get_mime_types() {
return KNOWN_MIME_TYPES;
}
}
public class HeifSniffer : GdkSniffer {
private const string[] MAGIC_SEQUENCES = { "heic", "heix", "hevc", "heim", "heis", "hevm", "hevs", "mif1", "msf1"};
public HeifSniffer(File file, PhotoFileSniffer.Options options) {
base (file, options);
}
public override DetectedPhotoInformation? sniff(out bool is_corrupted) throws Error {
// Rely on GdkSniffer to detect corruption
is_corrupted = false;
if (!is_supported_bmff_with_variants(file, MAGIC_SEQUENCES))
return null;
DetectedPhotoInformation? detected = base.sniff(out is_corrupted);
if (detected == null)
return null;
if (detected.file_format == PhotoFileFormat.AVIF)
detected.file_format = PhotoFileFormat.HEIF;
// Heif contains its own rotation information, so we need to ignore the EXIF rotation+
if (detected.metadata != null) {
detected.metadata.set_orientation(Orientation.TOP_LEFT);
}
return (detected.file_format == PhotoFileFormat.HEIF) ? detected : null;
}
}
public class HeifReader : GdkReader {
public HeifReader(string filepath) {
base (filepath, PhotoFileFormat.HEIF);
}
public override PhotoMetadata read_metadata() throws Error {
PhotoMetadata metadata = new PhotoMetadata();
metadata.read_from_file(get_file());
// Heif contains its own rotation information, so we need to ignore the EXIF rotation
metadata.set_orientation(Orientation.TOP_LEFT);
return metadata;
}
}
public class HeifMetadataWriter : PhotoFileMetadataWriter {
public HeifMetadataWriter(string filepath) {
base (filepath, PhotoFileFormat.HEIF);
}
public override void write_metadata(PhotoMetadata metadata) throws Error {
metadata.write_to_file(get_file());
}
}
public class HeifFileFormatDriver : PhotoFileFormatDriver {
private static HeifFileFormatDriver instance = null;
public static void init() {
instance = new HeifFileFormatDriver();
HeifFileFormatProperties.init();
}
public static HeifFileFormatDriver get_instance() {
return instance;
}
public override PhotoFileFormatProperties get_properties() {
return HeifFileFormatProperties.get_instance();
}
public override PhotoFileReader create_reader(string filepath) {
return new HeifReader(filepath);
}
public override bool can_write_image() {
return false;
}
public override bool can_write_metadata() {
return true;
}
public override PhotoFileWriter? create_writer(string filepath) {
return null;
}
public override PhotoFileMetadataWriter? create_metadata_writer(string filepath) {
return new HeifMetadataWriter(filepath);
}
public override PhotoFileSniffer create_sniffer(File file, PhotoFileSniffer.Options options) {
return new HeifSniffer(file, options);
}
public override PhotoMetadata create_metadata() {
return new PhotoMetadata();
}
}
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