Re: [linux-audio-dev] Realtime problems with midi/osc sequencer

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> I'd suggest using clock_nanosleep() and clock_gettime() with
> clockid=CLOCK_MONOTONIC.
> This is the "more right" approach than select/gettimeofday().
>
>
> Dmitry.

Yeah clock_nanosleep did it!
I got a stable absolute bpm exact midi clock.
I'll test the osc messages tomorrow( I've to rewrite some stuff of my
first sequencer ).
Whooo, thanks alot.
Christian

p.s.:
The Code:
[CODE]
void Timer::runThread()
{
        std::list<Seq>::iterator iter;
        timespec timeOut;
        int shortTickCount=0;
        int longTickCount=0;
        int midiTickCount=0;
        
        struct sched_param rtparam;
        memset (&rtparam, 0, sizeof (rtparam));
        rtparam.sched_priority = 99;
        pthread_setschedparam (thread, SCHED_FIFO, &rtparam);
        
        while( !bRunning )
                usleep ( 100 );
        
        clock_gettime( CLOCK_MONOTONIC, &timeOut );
        
        for( iter=seqs.begin(); iter!=seqs.end(); iter++ )
        {
                lo_send_timestamped( iter->address, LO_TT_IMMEDIATE, "/timer/tick",
"iii", iTact, iShortTick, iLongTick );
        }
        
        while( !bQuit )
        {
                if( shortTickCount == 3 )
                {
                        iShortTick++;
                        shortTickCount=0;
                        if( iShortTick == 256 )
                        {
                                iShortTick=0;
                                iLongTick=0;
                                iTact++;
                        }
                        for( iter=seqs.begin(); iter!=seqs.end(); iter++ )
                        {
                                lo_send_timestamped( iter->address, LO_TT_IMMEDIATE, "/timer/tick",
"iii", iTact, iShortTick, iLongTick );
                        }
                }
                
                if( longTickCount == 4 )
                {
                        longTickCount=0;
                        iLongTick++;
                }
                
                if( midiTickCount == 8 )
                {
                        midiTickCount=0;
                          midiOut->sendMessage( &midiMsg );
                }
                
                shortTickCount++;
                longTickCount++;
                midiTickCount++;
                
                timeOut.tv_nsec+=iTick*1000;
                if( timeOut.tv_nsec >1000000000 )
                {
                        timeOut.tv_sec++;
                        timeOut.tv_nsec=timeOut.tv_nsec-1000000000;
                }
                
                clock_nanosleep( CLOCK_MONOTONIC, TIMER_ABSTIME, &timeOut, NULL );
        }
        pthread_exit( 0 );
}
[/CODE]
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Received on Sun Mar 11 00:15:04 2007