mp4-latm-depack.h

来自「symbian 下的helix player源代码」· C头文件 代码 · 共 110 行

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
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 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
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 * The contents of this file, and the files included with this file, are 
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 * 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 
 * directly from RealNetworks.  You may not use this file except in 
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 * This file is part of the Helix DNA Technology. RealNetworks is the 
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 * ***** END LICENSE BLOCK ***** */ 

#ifndef MP4_LATM_DEPACK_H
#define MP4_LATM_DEPACK_H

#include "hxtypes.h"
#include "mp4a-mux-cfg.h"

typedef void (*OnFrameCB)(void* pUserData, ULONG32 ulTime, 
			  const UINT8* pData, ULONG32 ulSize,
			  BOOL bPreviousLoss);

class MP4LATMDepack
{
public:
    MP4LATMDepack();
    ~MP4LATMDepack();

    BOOL Init(ULONG32 ulProfileID,
	      ULONG32 ulObject,
	      ULONG32 ulBitrate,
	      BOOL bConfigPresent,
	      const UINT8* pStreamMuxConfig,
	      ULONG32 ulMuxConfigSize,
	      OnFrameCB pFrameCB,
	      void* pUserData);
    
    BOOL GetCodecConfig(const UINT8*& pConfig, ULONG32& ulConfigSize);

    BOOL SetTimeBase(ULONG32 ulSampleRate);
    
    BOOL SetFrameDuration(ULONG32 ulFrameDuration);

    BOOL Reset(); // Completely reset the depacketizer state

    BOOL Flush(); // Indicates end of stream

    BOOL OnPacket(ULONG32 ulTime, const UINT8* pData,
		  ULONG32 ulSize, BOOL bMarker);

    BOOL OnLoss(ULONG32 ulNumPackets); // called to indicate lost packets

protected:
    BOOL ProcessStagingBuffer(const UINT8* pBuffer);

    BOOL HandleMuxConfig(Bitstream& bs);
    void GetPayloadLengths(Bitstream& bs);
    void GetPayloads(Bitstream& bs, ULONG32 ulTime);

private:
    ULONG32 m_ulSampleRate;
    ULONG32 m_ulFrameDuration;

    void* m_pUserData;
    OnFrameCB m_pCallback;

    BOOL m_bConfigPresent;
    MP4AMuxConfig m_muxConfig;

    BOOL m_bNeedTime;
    ULONG32 m_ulCurrentTime;

    UINT8* m_pStagingBuf;
    ULONG32 m_ulStagingBufSize;
    ULONG32 m_ulBytesStaged;
    
    ULONG32* m_pSlotLengths;

    UINT8* m_pPayloadBuf;
    ULONG32 m_ulPayloadBufSize;

    BOOL m_bHadLoss;
    BOOL m_bNeedMarker;
};

#endif // MP4_LATM_DEPACK_H