av/stream/flac: finished cleaning up decode

stream/flac/decode.go

@@ -114,7 +114,9 @@ func Decode(buf []byte) ([]byte, error) {
 	return decodeFrames(stream, intBuf, enc, ws)
 }
 
-//
+// decodeFrames parses frames from the stream and encodes them into WAV until
+// the end of the stream is reached. The bytes from writeSeeker buffer are then
+// returned. If any errors occur during encodeing, nil bytes and the error is returned.
 func decodeFrames(s *flac.Stream, intBuf *audio.IntBuffer, e *wav.Encoder, ws *writeSeeker) ([]byte, error) {
 	var data []int
 	for {