一个重构的有关问题

一个重构的问题
请问以下代码怎么重构比较好呢

  FilterInf* pFilterInf = new MpcAviSourceSplitterInf();
CDsFilter* pFilter = new CDsFilterFile(*pFilterInf);
m_source.AddTail(pFilter);
delete pFilterInf;
pFilterInf = NULL;


pFilterInf = new MpcFlvSourceSplitterInf();
pFilter = new CDsFilterInternal(*pFilterInf);
m_source.AddTail(pFilter);
delete pFilterInf;
pFilterInf = NULL;

pFilterInf = new MpcDSMSourceSplitterInf();
pFilter = new CDsFilterDMO(*pFilterInf);
m_source.AddTail(pFilter);
delete pFilterInf;
pFilterInf = NULL;


谢谢

------解决方案--------------------
用宏吧，只有类型不一致
------解决方案--------------------
用auto_ptr来自动释放指针。代码如下：

C/C++ code

auto_ptr<FilterInf> pFilterAviInf(new MpcAviSourceSplitterInf());
m_source.AddTail(new CDsFilterFile(*pFilterAviInf.get()));

auto_ptr<FilterInf> pFilterFlvInf(new MpcFlvSourceSplitterInf());
m_source.AddTail(new CDsFilterInternal(*pFilterFlvInf.get()));

auto_ptr<FilterInf> pFilterDSMInf(new MpcDSMSourceSplitterInf());
m_source.AddTail(new CDsFilterDMO(*pFilterDSMInf.get()));