Extract shownotes from id3 comment field

1 files changed, 39 insertions, 0 deletions

diff --git a/parser/media/src/main/java/de/danoeh/antennapod/parser/media/id3/Id3MetadataReader.java b/parser/media/src/main/java/de/danoeh/antennapod/parser/media/id3/Id3MetadataReader.java
new file mode 100644
index 000000000..e6cc67ee8
--- /dev/null
+++ b/parser/media/src/main/java/de/danoeh/antennapod/parser/media/id3/Id3MetadataReader.java
@@ -0,0 +1,39 @@
+package de.danoeh.antennapod.parser.media.id3;
+
+import androidx.annotation.NonNull;
+import de.danoeh.antennapod.parser.media.id3.model.FrameHeader;
+import org.apache.commons.io.input.CountingInputStream;
+
+import java.io.IOException;
+
+/**
+ * Reads general ID3 metadata like comment, which Android's MediaMetadataReceiver does not support.
+ */
+public class Id3MetadataReader extends ID3Reader {
+    public static final String FRAME_ID_COMMENT = "COMM";
+
+    private String comment = null;
+
+    public Id3MetadataReader(CountingInputStream input) {
+        super(input);
+    }
+
+    @Override
+    protected void readFrame(@NonNull FrameHeader frameHeader) throws IOException, ID3ReaderException {
+        if (FRAME_ID_COMMENT.equals(frameHeader.getId())) {
+            long frameStart = getPosition();
+            int encoding = readByte();
+            skipBytes(3); // Language
+            String shortDescription = readEncodedString(encoding, frameHeader.getSize() - 4);
+            String longDescription = readEncodedString(encoding,
+                    (int) (frameHeader.getSize() - (getPosition() - frameStart)));
+            comment = shortDescription.length() > longDescription.length() ? shortDescription : longDescription;
+        } else {
+            super.readFrame(frameHeader);
+        }
+    }
+
+    public String getComment() {
+        return comment;
+    }
+}