MNTFRCSend.h

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/* Copyright (C) 2000 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 MN_TFRCSEND_H
#define MN_TFRCSEND_H

#include <sys/types.h>
#include "var_type.h"
#include "MNRTPNetTypes.h"
#include "MNTimeval.h"
#include "MNTimerCall.h"
#include "lcrtp/MNLCRTPdefs.h"

#define M_INITRTT     0           /* different modes of operation */
#define M_SLOWSTART   1
#define M_NORMAL      2
#define M_NO_INCREASE 3           /* only in receiver */


class MNTFRCSend
{
    u_int32 _packets_sent;
    u_int32 _reports_recv;
    u_int32 _rtt_cur;
    u_int32 _round;
    int64   _start;
    int64   _end;
    int64   _rep_ts;
    int64   _adj_ts;
    int64   _delay;
    int64   _delay_diff;
    double  _rtt;
    double  _sqrt_rtt;
    double  _b_rep;
    double  _b_act;
    double  _b_exp;
    double  _min_bitrate;
    double  _max_bitrate;
    double  _max_increase;
    double  _rate_delta;
    int     _mode;
    int     _force_n_mode;
    int     _cbr;
    bool    _nready;
    bool    _first;
    Timeval  _start_time;
    Timeval  _old_time;
    MNTimer  _timer;
    MNMutex  _timer_mutex;

    MNDebugMutex  _lock;
   
    TimerCall<MNTFRCSend> _cb;
    // stuff is only needed to do some meassurements - MZ
    static int _counter;
    int        _local_counter;
public:
    MNTFRCSend( MNSelector& sel );
    virtual ~MNTFRCSend( );

    int     init(double minb, double maxb);
    u_int32 tfrc_prep( rtp_hdr_ext_tfrc* packet,
                       Timeval& next_playtime_packet ); 
    void    feedback_received( LCfeedb_tfrc_t* rep );
private:
    void update_mode( u_int32 b_exp ); 
    void update_bexp( u_int32 b_exp );
    void set_timeout( );
    void init_time( ); 


    void prepare_packet(rtp_hdr_ext_tfrc* packet);
    void prepare_packet(MNRope*& packet);
    void not_sent( );
    void set_cbr( int cbr );
    void wait();
    int  get_cbr( );
    int64 get_time(); 

    inline int64 get_time( int64 buffered_get_time ) const {
        return buffered_get_time;
    }

    virtual void timer_callback ( void* ref_data, TimerCallBase* ptr );
};

#endif /* MN_TFRCSEND_H */

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