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87 lines
2 KiB
C
87 lines
2 KiB
C
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/***************************************************************************\
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*
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* MPEG Layer3-Audio Decoder
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* <EFBFBD> 1997-2006 by Fraunhofer IIS
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* All Rights Reserved
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*
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* filename: mp3ancofl.h
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* project : MPEG Decoder
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* author : Dieter Weninger
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* date : 2003-05-14
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* contents: ancillary data and original file length - HEADER
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*
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\***************************************************************************/
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#ifndef __MP3ANCOFL_H__
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#define __MP3ANCOFL_H__
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#include "mpegbitstream.h"
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#define ID_OFL 0xB
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#define VERSION_0_LEN 8 /* bytes */
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#define VERSION_1_LEN 10 /* bytes */
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class CMp3AncOfl
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{
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public:
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CMp3AncOfl(CBitStream &__Db);
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~CMp3AncOfl();
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void Reset(void);
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int getVersion(void);
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unsigned int getTotalLength(void);
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unsigned int getCodecDelay(void);
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unsigned int getAddDelay(void);
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bool validOfl(void);
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void fetchOfl(int oflOn,
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CBitStream &Db,
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int beforeScf,
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unsigned int* startDelay,
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unsigned int* totalLength);
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int readAnc(unsigned char *ancBytes,
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CBitStream &Db,
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const int numAncBits);
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int doReadBytes(){return m_readBytes;}
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private:
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void crcOfl(unsigned short crcPoly,
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unsigned short crcMask,
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unsigned long *crc,
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unsigned char byte);
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void cleanUp(void);
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bool isFhGAnc( int size);
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bool readOfl(CBitStream &Db, int beforeScaleFactors);
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bool isOfl(void);
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bool justSearched(void);
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int toSkip(void);
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void getOfl(CBitStream &Db, const int len);
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CBitStream &m_Db; // dynamic buffer
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unsigned char oflArray[10];
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bool m_valid;
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bool m_searched;
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bool m_semaphor;
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bool m_FhGAncChecked;
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bool m_collecting;
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bool m_mp3pro;
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unsigned char* m_FhGAncBuf;
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unsigned char* m_tmpAncBuf;
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int m_pFhGAncBuf;
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int m_FhGAncBufSize;
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// flag signalling byte- or bit-wise reading
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int m_readBytes;
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};
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#endif /* __MP3ANCOFL_H__ */
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