RetransBase.h

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/* Copyright (C) 2002 KOM/Darmstadt University of Technology
 *
 * You are allowed to use all other parts of the code under the following terms:
 *
 * For non-commercial use, code may be used in unmodified form provided
 * that this copyright notice and this permission notice appear in
 * supporting documentation.
 *
 * This software is provided "as is" and without any express or implied
 * warranties, including, without limitation, the implied warranty of
 * fitness for a particular purpose.
 *
 * The code may be subjected to the GNU General Public License, Version 2,
 * and re-distributed under the terms of this license.
 * As a special exception, permission is granted to link this code
 * with the Qt library and distribute executables, as long as you
 * follow the requirements of the GNU GPL in regard to all of the
 * software in the executable aside from Qt.
 *
 * Commercial use other than under the terms of the GNU General Public
 * License is allowed only after express negotiation of conditions
 * with the authors.
 */

#ifndef RETRANS_BASE_H
#define RETRANS_BASE_H

#include <config.h>

#include "var_type.h"
#include "sdp/PayloadTypes.h"
#include "sdp/RetransTypes.h"
#include "sh/SHReport.h"
#include "sh/SHReturnCodes.h"
#include "MNTimeval.h"

/**************************************************************
 * Class: RetransBase
 * Description: contains the basic functionality  to perform
 *              retransmissions.
 * Oslo, August 2002
 **************************************************************/

namespace SH
{
    class Base;
    class SinkEndpoint;
    class Data;
};

class MNRope;
class MNRTPEncoderBase;

class RetransBase
{
public:

     RetransBase( );
     virtual ~RetransBase( );

    static RetransBase* factory( SDP::RetransTypes retrans_type, SH::Base* enc );

    virtual MNRope*           createExtensionHeaderData( int& type ) = 0;

    virtual void              setEncoder( MNRTPEncoderBase* enc ) = 0;

    virtual MNRTPEncoderBase* getEncoder( )                       = 0;

    virtual bool hasExtHeader( )                                  = 0;
    virtual bool prepareCallback( )                               = 0;
    virtual SH::ReportPtr sendEnd( );
    virtual MNRope* get_next_data( SH::SinkEndpoint* pull_here,
                           size_t          max_bytes_to_pull,
                           SH::ReturnCode&   except,
                           size_t&         pulled_bytes,
                           bool&           rtp_marker,
                           u_int32&        rtp_timestamp,
                           Timeval&        next_playtime_packet,
                           int             bandwidth,
                           int&            cbpidx )            = 0;
    virtual bool    evalRTRTCP( void* data, int len, int subtype, int& cbpidx);
  
};

#endif /* RETRANS_BASE_H */

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