int theora_control(theora_state *th,int req,void *buf,size_t buf_sz) {
  CP_INSTANCE *cpi = th->internal_encode;
  PB_INSTANCE *pbi = &cpi->pb;
  
  switch(req) {
    case TH_ENCCTL_SET_QUANT_PARAMS:
  	  if( ( buf==NULL&&buf_sz!=0 )
  	   || ( buf!=NULL&&buf_sz!=sizeof(th_quant_info) )
  	   || cpi->CurrentFrame != 1 ){
        return TH_EINVAL;
      }
      
      memcpy(&pbi->quant_info, buf, sizeof(th_quant_info));
      InitQTables(pbi);
      
      return 0;
    default:
      return TH_EIMPL;
  }
}int theora_control(theora_state *th,int req,void *buf,size_t buf_sz) {
  CP_INSTANCE *cpi = th->internal_encode;
  PB_INSTANCE *pbi = &cpi->pb;
  
  switch(req) {
    case TH_ENCCTL_SET_QUANT_PARAMS:
  	  if( ( buf==NULL&&buf_sz!=0 )
  	   || ( buf!=NULL&&buf_sz!=sizeof(th_quant_info) )
  	   || cpi->CurrentFrame != 1 ){
        return TH_EINVAL;
      }
      
      memcpy(&pbi->quant_info, buf, sizeof(th_quant_info));
      InitQTables(pbi);
      
      return 0;
    default:
      return TH_EIMPL;
  }
}