servrsnd.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): 
 *  
 * ***** END LICENSE BLOCK ***** */ 

#ifndef _SERVER_RESEND_H_
#define _SERVER_RESEND_H_

class HX_deque;
class BasePacket;

class RTSPResendBuffer
{
public:
    RTSPResendBuffer(UINT32 bufferDuration, UINT32 maxBufferDuration,
                     UINT32 growthRate, UINT32 wrapSequenceNumber);
    ~RTSPResendBuffer();

    void		Clear();
    void		Grow();
    void		Add(BasePacket* pPacket);
    void		Remove(UINT16 uSeqNo);
    BasePacket*		Find(UINT16 uSeqNo, BOOL bIsNAK);
    void		SetFirstSequenceNumber(UINT16 uSeqNo);
    UINT32		GetIndex(UINT32 uBaseSequenceNumber, UINT16 uSeqNo);
    UINT32		GetPacketIndex(UINT16 uSeqNo);
    UINT32		GetForceIndex(UINT16 uSeqNo);
    void		DiscardExpiredPackets(BOOL bForce,
			                      UINT32 uParameter);
    void		SetBufferDepth(UINT32 uMilliseconds);
    void		SetMaxBufferDepth(UINT32 uMilliseconds);
    HX_RESULT		UpdateStatistics(UINT32& ulResendSuccess,
			                 UINT32& ulResendFailure);

private:
    HX_deque*		m_pPacketDeque;
    UINT32		m_bufferDuration;
    UINT32		m_maxBufferDuration;
    UINT32		m_growthRate;
    UINT32		m_wrapSequenceNumber;
    UINT16		m_uFirstSequenceNumber;
    UINT16		m_uForceSequenceNumber;
    UINT32		m_ulResendSuccess;
    UINT32		m_ulResendFailure;
    BOOL		m_bSetFirstSequenceNumber;
};

inline UINT32
RTSPResendBuffer::GetPacketIndex(UINT16 uSeqNo)
{
    return GetIndex(m_uFirstSequenceNumber, uSeqNo);
}

inline UINT32
RTSPResendBuffer::GetForceIndex(UINT16 uSeqNo)
{
    return GetIndex(m_uForceSequenceNumber, uSeqNo);
}

#endif /* _SERVER_RESEND_H_ */