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72 lines
2 KiB
C
72 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: mpegbitstream.h
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* project : MPEG Decoder
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* author : Martin Sieler
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* date : 1997-12-05
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* contents/description: MPEG bitstream - HEADER
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*
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*
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\***************************************************************************/
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/*
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* $Date: 2010/11/17 20:46:04 $
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* $Id: mpegbitstream.h,v 1.1 2010/11/17 20:46:04 audiodsp Exp $
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*/
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#ifndef __MPEGBITSTREAM_H__
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#define __MPEGBITSTREAM_H__
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/* ------------------------ includes --------------------------------------*/
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#include "bitstream.h"
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#include "mpegheader.h"
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#include "mp3sscdef.h"
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/*-------------------------- defines --------------------------------------*/
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/*-------------------------------------------------------------------------*/
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//
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// MPEG bitstream class.
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//
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// This object is derived from CBitStream. In addition to CBitStream
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// this object is able to sync to the next ISO/MPEG header position.
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//
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class CMpegBitStream : public CBitStream
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{
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public:
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CMpegBitStream(int cbSize);
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CMpegBitStream(unsigned char *pBuf, int cbSize, bool fDataValid = false);
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virtual ~CMpegBitStream();
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virtual void Reset();
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SSC DoSync();
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int GetSyncPosition() const { return m_SyncPosition; }
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const CMpegHeader *GetHdr() const { return &m_Hdr; }
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protected:
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private:
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SSC DoSyncInitial();
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SSC DoSyncContinue();
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enum { FRAMES_TO_CHECK = 10 };
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CMpegHeader m_Hdr; // mpeg header
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unsigned long m_FirstHdr; // "relevant" bits of first good header
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unsigned long m_nFramesToCheck; // # frames to be checked for next mpeg header
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int m_SyncPosition; // offset of first sync in bits
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SSC m_SyncState; // last sync state
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};
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/*-------------------------------------------------------------------------*/
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#endif
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