void ACSequentialScan::OptimizeBlock(LONG, LONG, UBYTE ,double ,
                                     class DCT *,LONG [64])
{
  JPG_THROW(NOT_IMPLEMENTED,"ACSequentialScan::OptimizeBlock",
            "Rate-distortion optimization is not implemented for arithmetic coding");
}
void ACSequentialScan::OptimizeBlock(LONG, LONG, UBYTE ,double ,
                                     class DCT *,LONG [64])
{
  JPG_THROW(NOT_IMPLEMENTED,"ACSequentialScan::OptimizeBlock",
            "Rate-distortion optimization is not implemented for arithmetic coding");
}