1 files changed, 140 insertions, 0 deletions
diff --git a/src/photos/AvifSupport.vala b/src/photos/AvifSupport.vala
new file mode 100644
index 0000000..842f0fc
--- /dev/null
+++ b/src/photos/AvifSupport.vala
@@ -0,0 +1,140 @@
+/* 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 AvifFileFormatProperties : PhotoFileFormatProperties {
+    private static string[] KNOWN_EXTENSIONS = { "avif" };
+    private static string[] KNOWN_MIME_TYPES = { "image/avif" };
+
+    private static AvifFileFormatProperties instance = null;
+
+    public static void init() {
+        instance = new AvifFileFormatProperties();
+    }
+    
+    public static AvifFileFormatProperties get_instance() {
+        return instance;
+    }
+    
+    public override PhotoFileFormat get_file_format() {
+        return PhotoFileFormat.AVIF;
+    }
+    
+    public override PhotoFileFormatFlags get_flags() {
+        return PhotoFileFormatFlags.NONE;
+    }
+
+    public override string get_user_visible_name() {
+        return _("AVIF");
+    }
+
+    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 AvifSniffer : GdkSniffer {
+    public AvifSniffer(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, {"avif", "avis"}))
+            return null;
+        
+        DetectedPhotoInformation? detected = base.sniff(out is_corrupted);
+        if (detected == null)
+            return null;
+        
+        return (detected.file_format == PhotoFileFormat.AVIF) ? detected : null;
+    }
+}
+
+public class AvifReader : GdkReader {
+    public AvifReader(string filepath) {
+        base (filepath, PhotoFileFormat.AVIF);
+    }
+}
+
+public class AvifWriter : PhotoFileWriter {
+    public AvifWriter(string filepath) {
+        base (filepath, PhotoFileFormat.AVIF);
+    }
+    
+    public override void write(Gdk.Pixbuf pixbuf, Jpeg.Quality quality) throws Error {
+        pixbuf.save(get_filepath(), "avif", "quality", "90", null);
+    }
+}
+
+public class AvifMetadataWriter : PhotoFileMetadataWriter {
+    public AvifMetadataWriter(string filepath) {
+        base (filepath, PhotoFileFormat.AVIF);
+    }
+    
+    public override void write_metadata(PhotoMetadata metadata) throws Error {
+        metadata.write_to_file(get_file());
+    }
+}
+
+public class AvifFileFormatDriver : PhotoFileFormatDriver {
+    private static AvifFileFormatDriver instance = null;
+    
+    public static void init() {
+        instance = new AvifFileFormatDriver();
+        AvifFileFormatProperties.init();
+    }
+    
+    public static AvifFileFormatDriver get_instance() {
+        return instance;
+    }
+    
+    public override PhotoFileFormatProperties get_properties() {
+        return AvifFileFormatProperties.get_instance();
+    }
+    
+    public override PhotoFileReader create_reader(string filepath) {
+        return new AvifReader(filepath);
+    }
+    
+    public override bool can_write_image() {
+        return true;
+    }
+    
+    public override bool can_write_metadata() {
+        return true;
+    }
+    
+    public override PhotoFileWriter? create_writer(string filepath) {
+        return new AvifWriter(filepath);
+    }
+    
+    public override PhotoFileMetadataWriter? create_metadata_writer(string filepath) {
+        return new AvifMetadataWriter(filepath);
+    }
+    
+    public override PhotoFileSniffer create_sniffer(File file, PhotoFileSniffer.Options options) {
+        return new AvifSniffer(file, options);
+    }
+    
+    public override PhotoMetadata create_metadata() {
+        return new PhotoMetadata();
+    }
+}
+