outputpin.h

来自「完整的基于Conxant平台的USB电视棒的WIN驱动程序。」· C头文件 代码 · 共 73 行

/*+++ *******************************************************************\ 
* 
*  Copyright and Disclaimer: 
*  
*     --------------------------------------------------------------- 
*     This software is provided "AS IS" without warranty of any kind, 
*     either expressed or implied, including but not limited to the 
*     implied warranties of noninfringement, merchantability and/or 
*     fitness for a particular purpose.
*     --------------------------------------------------------------- 
*   
*     Copyright (c) 2008 Conexant Systems, Inc. 
*     All rights reserved. 
*
\******************************************************************* ---*/ 

class CY8Filter;

//
// COutputPin
//
// COutputPin manages the data flow from the output pin.
class COutputPin : public CBaseOutputPin
{

public:

    COutputPin(
        TCHAR *pObjectName,
        CY8Filter *CY8Convert,
        HRESULT * phr,
        LPCWSTR pName);
    ~COutputPin();

    // override to expose IMediaPosition
    STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void **ppv);

    // --- CBaseOutputPin ------------

    STDMETHODIMP QueryId(LPWSTR * Id)
    {
        return AMGetWideString(L"Out", Id);
    }

    // Grab and release extra interfaces if required

    HRESULT BreakConnect();

	HRESULT CheckConnect(IPin *pPin);

    // check that we can support this output type
    HRESULT CheckMediaType(const CMediaType* mtOut);

    // set the connection media type
    HRESULT SetMediaType(const CMediaType *pmt);

    // called from CBaseOutputPin during connection to ask for
    // the count and size of buffers we need.
    HRESULT DecideBufferSize(
                IMemAllocator * pAlloc,
                ALLOCATOR_PROPERTIES *pProp);

    // returns the preferred formats for a pin
    HRESULT GetMediaType(int iPosition,CMediaType *pMediaType);

    // inherited from IQualityControl via CBasePin
    STDMETHODIMP Notify(IBaseFilter * pSender, Quality q);

private:
    CY8Filter *m_pSrcFilter;
    CPosPassThru* _p_pos_passthrough;
};