aacbitstream.h

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/* ***** BEGIN LICENSE BLOCK *****  
 * Source last modified: $Id: aacbitstream.h,v 1.1 2005/02/26 01:47:34 jrecker Exp $ 
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/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * aacbitstream.h - definitions of bitstream handling functions
 **************************************************************************************/

#ifndef _BITSTREAM_H
#define _BITSTREAM_H

#include "aaccommon.h"

/* additional external symbols to name-mangle for static linking */
#define SetBitstreamPointer             STATNAME(SetBitstreamPointer)
#define GetBits                         STATNAME(GetBits)
#define GetBitsNoAdvance                STATNAME(GetBitsNoAdvance)
#define AdvanceBitstream                STATNAME(AdvanceBitstream)
#define CalcBitsUsed                    STATNAME(CalcBitsUsed)
#define ByteAlignBitstream              STATNAME(ByteAlignBitstream)

typedef struct _BitStreamInfo {
    unsigned char *bytePtr;
    unsigned int iCache;
    int cachedBits;
    int nBytes;
} BitStreamInfo;

/* aacbitstream.c */
void SetBitstreamPointer(BitStreamInfo *bsi, int nBytes, unsigned char *buf);
unsigned int GetBits(BitStreamInfo *bsi, int nBits);
unsigned int GetBitsNoAdvance(BitStreamInfo *bsi, int nBits);
void AdvanceBitstream(BitStreamInfo *bsi, int nBits);
int CalcBitsUsed(BitStreamInfo *bsi, unsigned char *startBuf, int startOffset);
void ByteAlignBitstream(BitStreamInfo *bsi);

#endif  /* _BITSTREAM_H */