I was having some problems with the Vorbis SPI (JavaSound plugin) from javazoom — it cuts off silence at the end of vorbis audio. It also closes its input stream when reaching the end of the audio, requiring a nasty hack to support looping playback.
At the same time, I was also looking for a way to play video’s from an unsigned applet. Luckily, adapting Cortado solves both my problems. It includes 100% Java implementations of Ogg/Vorbis/Theora decoders. I ripped out the decoders and added my own code for time-accurate seeking and stream synchronization.
Writing a new Vorbis SPI was quite easy once I had a fully functioning Theora player.