- mainPtr->buffer[ci] = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, mainPtr->whole_image[ci],
- mainPtr->cur_iMCU_row * (compptr->v_samp_factor * DCTSIZE),
- (JDIMENSION) (compptr->v_samp_factor * DCTSIZE), writing);
+ main->buffer[ci] = (*cinfo->mem->access_virt_sarray)
+ ((j_common_ptr) cinfo, main->whole_image[ci],
+ main->cur_iMCU_row * (compptr->v_samp_factor * data_unit),
+ (JDIMENSION) (compptr->v_samp_factor * data_unit), writing);