Parse Vorbis comments from Ogg Vorbis stream.

diff --git a/src/main/java/net/pterodactylus/sonitus/io/OggVorbisIdentifier.java b/src/main/java/net/pterodactylus/sonitus/io/OggVorbisIdentifier.java
index 769acf2..bbbecd2 100644 (file)
--- a/src/main/java/net/pterodactylus/sonitus/io/OggVorbisIdentifier.java
+++ b/src/main/java/net/pterodactylus/sonitus/io/OggVorbisIdentifier.java
@@ -115,7 +115,39 @@ public class OggVorbisIdentifier {
                        buffer = syncState.data;
                }
 
-               return Optional.of(new Metadata(info.channels, info.rate, "Vorbis"));
+               Metadata metadata = new Metadata(info.channels, info.rate, "Vorbis");
+               for (int c = 0; c < comment.comments; ++c) {
+                       String field = comment.getComment(c);
+                       Optional<String> extractedField = extractField(field, "ARTIST");
+                       if (extractedField.isPresent()) {
+                               metadata = metadata.artist(extractedField.get());
+                               continue;
+                       }
+                       extractedField = extractField(field, "TITLE");
+                       if (extractedField.isPresent()) {
+                               metadata = metadata.name(extractedField.get());
+                               continue;
+                       }
+               }
+               return Optional.of(metadata);
+       }
+
+       /**
+        * Extracts the content of the field from the comment if the comment contains
+        * the given field.
+        *
+        * @param comment
+        *              The comment to extract the value from
+        * @param fieldName
+        *              The name of the field to extract
+        * @return The extracted field, or {@link Optional#absent()} if the comment
+        *         does not contain the given field
+        */
+       private static Optional<String> extractField(String comment, String fieldName) {
+               if (comment.startsWith(fieldName + "=")) {
+                       return Optional.of(comment.substring(fieldName.length() + 1));
+               }
+               return Optional.absent();
        }
 
 }