strmdec.h

来自「ESS3890+SL原代码（1*16内存）」· C头文件 代码 · 共 99 行

/* Copyright 1997, ESS Technology, Inc.                                 */
/* SCCSID @(#)strmdec.h	1.1 01/23/02 */

/* Based on DVD code version  	1.4 06/28/01 */

#ifndef __STRMDEC_WMA_H_
#define __STRMDEC_WMA_H_

#define VALID				0
#define END_OF_FILE			1
#define ILLEGAL_PATTERN		3
#ifndef EOF
#define EOF                 (-1)
#endif

#define NONSUPER_WRAPAROUND 1024

#if 0 /*GMGM */
extern const UInt getMask [33];
#endif
#if defined(_DEBUG) || defined(BITRATE_REPORT)
extern Int g_cBitGet;
#endif  /* _DEBUG || BITRATE_REPORT */
#if 0 /* GMGM */
typedef WMARESULT (*PFNGETMOREDATA)(U8 **ppBuffer, U32 *pcbBuffer, U32 user_data);
#endif
typedef struct CWMAInputBitStream {

/*wchen: add for streaming mode */
#if 0 /* GMGM */
    PFNGETMOREDATA  m_pfnGetMoreData;
#endif
    U32             m_dwUser;
    U32             m_dwOwner;

    U32     m_dwHeaderBuf;      /* hold the packet header data */
    U8	    *m_pBufferBegin;    /* begining of packet for reset */
    U32	    m_cbBuflenBegin;    /* used in association of m_pBufferBegin	 */
    U8		*m_pBuffer;
    Int		m_cbBuflen;
    UInt	m_dwDot;
    UInt	m_dwBitsLeft;
    Int     m_iPrevPacketNum;
    Bool    m_fAllowPackets;
    Bool    m_fSuppressPacketLoss;
#if 0 /* GMGM */
    WMARESULT (*ibstrmpfnPeekBits) (struct CWMAInputBitStream *pibstrm, register UInt dwNumBits,
                                    U32 *piNumBits);
#endif
} CWMAInputBitStream;
#if 0 /* GMGM */
Void        ibstrmInit (CWMAInputBitStream* pibstrm, Bool fAllowPackets);
Void        ibstrmAttach(CWMAInputBitStream *pibstrm, U32 dwDot, U32 dwBitsLeft, U8* pbSrc, I32 cbSrc);
Void ibstrmReset(CWMAInputBitStream *pibstrm);
INLINE UInt ibstrmBitsLeft (const CWMAInputBitStream* pibstrm) {return pibstrm->m_dwBitsLeft;}
INLINE U32  ibstrmDwBuf (const CWMAInputBitStream* pibstrm) {return pibstrm->m_dwDot;}
INLINE U8*  ibstrmBuf (const CWMAInputBitStream* pibstrm) {return pibstrm->m_pBuffer;}
INLINE Int  ibstrmBufLen (const CWMAInputBitStream* pibstrm) {return pibstrm->m_cbBuflen;}

INLINE Void ibstrmSetGetMoreData(CWMAInputBitStream *pibs, PFNGETMOREDATA pfnGetMoreData)
                        { pibs->m_pfnGetMoreData = pfnGetMoreData; }
INLINE Void ibstrmSetUserData(CWMAInputBitStream *pibs, U32 dwUser) 
                        { pibs->m_dwUser = dwUser; }
INLINE Void ibstrmSetOwner(CWMAInputBitStream *pibs, U32 dwOwner) 
                        { pibs->m_dwOwner = dwOwner; }
INLINE U32  ibstrmGetPacketHeader(CWMAInputBitStream *pibs) 
                        { return pibs->m_dwHeaderBuf; }
INLINE Void ibstrmSetPacketHeader(CWMAInputBitStream *pibs, U32 iVal) 
                        { pibs->m_dwHeaderBuf = iVal; }
Void        ibstrmResetPacket(CWMAInputBitStream *pibstrm); /* reset to the beginning of packet */
WMARESULT   ibstrmGetMoreData(CWMAInputBitStream *pibstrm, U32 *piBufLen);
WMARESULT   ibstrmPeekBitsNonStop (CWMAInputBitStream *pibstrm, register UInt dwNumBits,
                                   U32 *piNumBits);
WMARESULT   ibstrmPeekBits (CWMAInputBitStream *pibstrm, register UInt dwNumBits,
                            U32 *piNumBits);
WMARESULT   ibstrmLookForBits (CWMAInputBitStream *pibstrm, UInt dwNumBits);
WMARESULT   ibstrmFlushBits (CWMAInputBitStream *pibstrm, register UInt dwNumBits);
INLINE Void ibstrmFlush (CWMAInputBitStream* pibstrm) 
                        { pibstrm->m_dwBitsLeft -= (pibstrm->m_dwBitsLeft % 8); } 

/*private */
WMARESULT prvFinalLoad(CWMAInputBitStream* pibstrm,
                       UInt             dwRetval,
                       UInt             dwBitsToAdd,
                       U32             *piResult);

/*INLINE*/ WMARESULT ibstrmGetBits (CWMAInputBitStream* pibstrm, register UInt dwNumBits,
                                    U32 *piResult);
#endif

U32  ibstrmGetPacketHeader(CWMAInputBitStream *pibs);
WMARESULT ibstrmGetMoreData(CWMAInputBitStream *pibs, U32 *piBufLen);
#define WMA_set_fNoMoreData(val)        (pAudDecoder->m_fNoMoreData = val)
U8 WMA_get_nHdrBits(void);

#endif /* __STRMDEC_WMA_H_ */