extern void sony_cleanup_writer(dsreq_t *dsp);
extern boolean_t sony_setup_writer(SETUP_WRITER_ARGS);
extern boolean_t sony_write_audio(WRITE_AUDIO_ARGS);
extern boolean_t sony_write_image(WRITE_IMAGE_ARGS);
extern boolean_t sony926_write_audio(WRITE_AUDIO_ARGS);
extern boolean_t sony926_write_image(WRITE_IMAGE_ARGS);