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codeclib.h：源码内容
							/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
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 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
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 * contents of the file.  
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 * This file is part of the Helix DNA Technology. RealNetworks is the 
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 * it created. 
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 * ***** END LICENSE BLOCK ***** */ 
#ifndef __CODECLIB_H__
#define __CODECLIB_H__
#include "hxcodec.h"
typedef HX_RESULT (HXEXPORT_PTR FPCODECOPEN)(HX_MOFTAG moftFormatTag,HXCODEC *codecRef);
typedef HX_RESULT (HXEXPORT_PTR FPCODECCLOSE)(HXCODEC codecRef);
typedef HX_RESULT (HXEXPORT_PTR FPCODECGETUINAME)(HXCODEC codecRef,char *nameBuf);
typedef HX_RESULT (HXEXPORT_PTR FPCODECGETVERSION)(HXCODEC codecRef, ULONG32 *pVersion);
typedef HX_RESULT (HXEXPORT_PTR FPCODECOPENSETTINGSBOX)(HXCODEC codecRef, void * platformData);
typedef HX_RESULT (HXEXPORT_PTR FPCODECQUERYMEDIAFORMAT)(HXCODEC codecRef,HX_MOF * pmofIn,
        HX_MOF * pmofOut, UINT16 ioDirection);
typedef HX_RESULT (HXEXPORT_PTR FPCODECPREFERREDMEDIAFORMAT)(HXCODEC codecRef,HX_MOF * pmofIn,
        HX_MOF * pmofOut, UINT16 ioDirection);
typedef HX_RESULT (HXEXPORT_PTR FPCODECGETMEDIAFORMATS)(HXCODEC codecRef,HX_MOF **pFormats,
        ULONG32 * numFormats,UINT16 oDirection);
typedef HX_RESULT (HXEXPORT_PTR FPCODECSTREAMOPEN)(HXCODEC codecRef,HXSTREAM *streamRef,HXCODEC_INIT
        *params);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMCLOSE)(HXSTREAM streamRef);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMSETDATACALLBACK)(HXSTREAM streamRef,HXSTREAM callbackRef,
        HXMEMORY memoryRef, FP_STREAM_DATA data_callback);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMGETSTREAMHEADERSIZE)(HXSTREAM streamRef, ULONG32 *puSize);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMGETSTREAMHEADER)(HXSTREAM streamRef, HX_MOF *pHeader);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMINPUT)(HXSTREAM streamRef,HXSTREAM      fromStreamRef,
        HXCODEC_DATA *pData);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMSETOUTPUTPACKETSIZE)(HXSTREAM streamRef,ULONG32 prefSize,
        ULONG32 maxSize,ULONG32 *actualSize);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMGETINPUTBUFFERSIZE)(HXSTREAM streamRef,ULONG32 *puSize);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMGETPROPERTY)(HXSTREAM streamRef,ULONG32 prop, void *pValue);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMSETPROPERTY)(HXSTREAM streamRef,ULONG32 prop, void *pValue);
// XXXKB: This needs to be modified to support the postfilter ROI:
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMPOSTPROCESS)
                                (HXSTREAM               streamRef,
                                 HXCODEC_DATA           *pncData,
                                 ULONG32                uCurrentTime,
                                 UCHAR                  *pDestBuffer,
                                 UINT32                 uDestPitch,
                                 INT32                  cidDestColorFormat);
typedef HX_RESULT (HXEXPORT_PTR FPSTREAMRELEASEFRAME)
                                (HXSTREAM               streamRef,
                                 HXCODEC_DATA   *pncData);
typedef PIHXUnknown (HXEXPORT_PTR FPGETHXUNKNOWN)(HXSTREAM streamRef);
typedef PIHXUnknown (HXEXPORT_PTR FPCODECGETHXUNKNOWN)(HXCODEC codecRef);
typedef HX_RESULT (HXEXPORT_PTR FPCODECINPUT) (HXCODEC codecRef, HXCODEC_DATA *pData);
typedef HX_RESULT (HXEXPORT_PTR FPCODECQUERYMEDIAFORMAT) (HXCODEC codecRef, 
		                                         HX_MOF * pmofIn, 
												 HX_MOF * pmofOut, 
												 UINT16 ioDirection);
class DLLAccessBridge;
class CRADynamicCodecLibrary
{
// Construction & Destruction
public:
    CRADynamicCodecLibrary(IUnknown* pContext = NULL, BOOL bDummy = FALSE);
    virtual ~CRADynamicCodecLibrary();
    virtual HX_RESULT   LoadCodecLib(HX_MOFTAG moftFormatTag, const char* szCodecDLL=NULL);
    virtual HX_RESULT   PNCodec_Open(HX_MOFTAG moftFormatTag,HXCODEC *codecRef) const;
    virtual HX_RESULT   PNCodec_Close(HXCODEC codecRef) const;
    virtual HX_RESULT   PNCodec_StreamOpen(HXCODEC codecRef,HXSTREAM *streamRef,HXCODEC_INIT *params) const;
    virtual HX_RESULT   PNStream_Close(HXSTREAM streamRef);
    virtual HX_RESULT   PNStream_SetDataCallback(HXSTREAM streamRef, HXSTREAM callbackRef,
                                                 HXMEMORY memoryRef, FP_STREAM_DATA data_callback) const;
    virtual HX_RESULT   PNStream_GetStreamHeaderSize(HXSTREAM streamRef,ULONG32 *puSize) const;
    virtual HX_RESULT   PNStream_GetStreamHeader(HXSTREAM streamRef,HX_MOF *pHeader) const;
    virtual HX_RESULT   PNStream_Input(HXSTREAM streamRef,HXSTREAM    fromStreamRef,HXCODEC_DATA *pData);
    virtual HX_RESULT   PNStream_SetOutputPacketSize(HXSTREAM streamRef,ULONG32 prefSize,
                                                     ULONG32 maxSize, ULONG32 *actualSize) const;
    virtual HX_RESULT   PNStream_GetInputBufferSize(HXSTREAM streamRef,ULONG32 *puSize) const;
    virtual HX_RESULT   PNStream_GetProperty(HXSTREAM streamRef,ULONG32 prop, void *pValue) const;
    virtual HX_RESULT   PNStream_SetProperty(HXSTREAM streamRef,ULONG32 prop, void *pValue) const;
    virtual HX_RESULT   PNStream_PostProcess(HXSTREAM      streamRef,
                                             HXCODEC_DATA* pncData,
                                             ULONG32       uCurrentTime,
                                             UCHAR*        pDestBuffer,
                                             UINT32        uDestPitch,
                                             INT32         cidDestColorFormat,
                                             UINT32        roiX,
                                             UINT32        roiY,
                                             UINT32        roiWidth,
                                             UINT32        roiHeight);
    virtual HX_RESULT   PNStream_ReleaseFrame(HXSTREAM      streamRef,
                                              HXCODEC_DATA* pncData);
    virtual PIHXUnknown PNStream_GetIPNUnknown(HXSTREAM streamRef) const;
    virtual HX_RESULT   PNCodec_GetUIName(HXCODEC codecRef,char *nameBuf) const;
    virtual HX_RESULT   DoAutoUpdate(BOOL bSigErr = TRUE) { return HXR_OK; }
    HX_RESULT           PNCodec_Input(HXCODEC codecRef,HXCODEC_DATA *pData);    
    virtual PIHXUnknown PNCodec_GetIPNUnknown(HXCODEC codecRef) const;
    
	virtual HX_RESULT PNCodec_QueryMediaFormat(HXCODEC codecRef, 
		                                         HX_MOF * pmofIn, 
												 HX_MOF * pmofOut, 
												 UINT16 ioDirection);
protected:
    IUnknown*			m_pContext;
    DLLAccessBridge*                  m_pCodecAccess;
    FPCODECOPEN                 m_fpHXCodec_Open;
    FPCODECCLOSE                m_fpHXCodec_Close;
    FPCODECSTREAMOPEN           m_fpHXCodec_StreamOpen;
    FPSTREAMCLOSE               m_fpHXStream_Close;
    FPSTREAMSETDATACALLBACK     m_fpHXStream_SetDataCallback;
    FPSTREAMGETSTREAMHEADERSIZE m_fpHXStream_GetStreamHeaderSize;
    FPSTREAMGETSTREAMHEADER     m_fpHXStream_GetStreamHeader;
    FPSTREAMINPUT               m_fpHXStream_Input;
    FPSTREAMSETOUTPUTPACKETSIZE m_fpHXStream_SetOutputPacketSize;
    FPSTREAMGETINPUTBUFFERSIZE  m_fpHXStream_GetInputBufferSize;
    FPSTREAMGETPROPERTY         m_fpHXStream_GetProperty;
    FPSTREAMSETPROPERTY         m_fpHXStream_SetProperty;
    FPSTREAMPOSTPROCESS         m_fpHXStream_PostProcess;
    FPSTREAMRELEASEFRAME        m_fpHXStream_ReleaseFrame;
    FPGETHXUNKNOWN              m_fpHXStream_GetIHXUnknown;
    FPCODECGETUINAME            m_fpHXCodec_GetUIName;
    FPCODECINPUT                m_fpHXCodecInput;
    FPCODECGETHXUNKNOWN         m_fpHXCodec_GetIHXUnknown;
    FPCODECQUERYMEDIAFORMAT		m_fpHXCodec_QueryMediaFormat;
    
#ifdef _MACINTOSH
    INT16                       m_CodecResFileNum;
    BOOL                        m_bNeedToUseResourceFile;
#endif
    BOOL                        OS_ValidModule (ULONG32 modHandle);
    BOOL                        OS_BuildLibName (HX_MOFTAG tag, char *libName);
    BOOL                        OS_BuildOldLibName (HX_MOFTAG tag, char *libName);
    void                        ClearFunctionPointers();
    BOOL			GetAlternateMoftCodecTag(HX_MOFTAG& alternateMoftCodecTag, 
							 HX_MOFTAG moftCodecTag, 
							 UINT32& ulAttemptCounter);
};
#endif // __CODECLIB_H__

						