vbrdepack.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * 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 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
 * 
 * Contributor(s): 
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 * ***** END LICENSE BLOCK ***** */ 

#ifndef VBRDEPACK_H
#define VBRDEPACK_H

// Forward declarations
typedef _INTERFACE IHXPacket             IHXPacket;
typedef _INTERFACE IHXCommonClassFactory IHXCommonClassFactory;
class CHXSimpleList;

// Defines
#define TIMESTAMP_GAP_FUDGE_FACTOR 1

class CVBRSimpleDepacketizer
{
public:
    CVBRSimpleDepacketizer();
    virtual ~CVBRSimpleDepacketizer();

    HX_RESULT Init(IUnknown* pContext, double dAUDuration, UINT16 usStreamNum,
                   UINT16 usKeyFrameRuleNum, BOOL bGenerateLossPackets);
    HX_RESULT PutPacket(IHXPacket* pPacket);
    HX_RESULT GetPacket(REF(IHXPacket*) rpPacket);
    HX_RESULT OnSeek(UINT32 ulOldTime, UINT32 ulNewTime);
protected:
    IHXCommonClassFactory* m_pCommonClassFactory;
    CHXSimpleList*         m_pFragQueue;
    CHXSimpleList*         m_pOutputQueue;
    double                 m_dAUDuration;
    UINT16                 m_usStreamNum;
    UINT16                 m_usKeyFrameRuleNum;
    UINT32                 m_ulLastQueuedPacketEndTime;
    BOOL                   m_bSeeked;
    BOOL                   m_bGenerateLossPackets;

    void      ClearQueue(CHXSimpleList* pList);
    HX_RESULT CreatePacket(BYTE* pBuf, UINT32 ulSize, UINT32 ulTime,
                           BOOL bLost, REF(IHXPacket*) rpPacket);
    HX_RESULT GenerateAndQueueLossPackets(UINT32 ulFirstPacketStartTime,
                                          UINT32 ulLastPacketEndTime);
    HX_RESULT AddToQueue(REF(CHXSimpleList*) rpList, IHXPacket* pPacket);
    HX_RESULT ParseVBRPacket(BYTE* pBuf, UINT32 ulSize, REF(UINT32) rulNumAU,
                             REF(BOOL) rbFragmented);
    UINT32    UnPackUINT16(BYTE* pBuf);
    void      RemoveDifferingPackets(UINT32 ulTime);
    BOOL      CanDefrag();
    HX_RESULT Defrag(REF(IHXPacket*) rpPacket);
    UINT32    GetAUSize(IHXPacket* pPacket, REF(UINT32) rulActualAUDataSize);
};

#endif /* #ifndef VBRDEPACK_H */