AU_UNKNOWN_SIZE    87 libavformat/au.c     if (data_size < 0 && data_size != AU_UNKNOWN_SIZE) {
AU_UNKNOWN_SIZE   143 libavformat/au.c     if (data_size != AU_UNKNOWN_SIZE)
AU_UNKNOWN_SIZE   186 libavformat/au.c     avio_wb32(pb, AU_UNKNOWN_SIZE);             /* data size */