jdkmidi class library documentation
Copyright © 2004 J.D. Koftinoff Software, Ltd.
Released under the GNU General Public License (GPL)

---

tests/jdkmidi_test_sequencer.cpp

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/*
 *  libjdkmidi-2004 C++ Class Library for MIDI
 *
 *  Copyright (C) 2004  J.D. Koftinoff Software, Ltd.
 *  www.jdkoftinoff.com
 *  jeffk@jdkoftinoff.com
 *
 *  *** RELEASED UNDER THE GNU GENERAL PUBLIC LICENSE (GPL) April 27, 2004 ***
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifdef WIN32
#include <windows.h>
#endif

#include "jdkmidi/world.h"
#include "jdkmidi/track.h"
#include "jdkmidi/multitrack.h"
#include "jdkmidi/filereadmultitrack.h"
#include "jdkmidi/fileread.h"
#include "jdkmidi/fileshow.h"
#include "jdkmidi/sequencer.h"

using namespace jdkmidi;


void DumpMIDIBigMessage( MIDITimedBigMessage *msg )
{
  if( msg )
  {
    char msgbuf[1024];
    
    fprintf( stdout, "%s\n", msg->MsgToText(msgbuf) );
    if( msg->IsSysEx() )
    {
      fprintf( stdout, "\tSYSEX length: %d\n", msg->GetSysEx()->GetLength() );
    }
    
  } 
  
} 

void DumpMIDITimedBigMessage( MIDITimedBigMessage *msg )
{
  if( msg )
  {
    char msgbuf[1024];
    
    fprintf( stdout, "%8ld : %s\n", msg->GetTime(), msg->MsgToText(msgbuf) );
    if( msg->IsSysEx() )
    {
      fprintf( stdout, "\tSYSEX length: %d\n", msg->GetSysEx()->GetLength() );
    }
    
  } 
  
} 

void DumpMIDITrack( MIDITrack *t ) 
{
  MIDITimedBigMessage *msg;
  
  for( int i=0; i<t->GetNumEvents(); ++i )
  {
    msg = t->GetEventAddress( i );
    DumpMIDITimedBigMessage( msg );   
    
  }
  
} 

void DumpAllTracks( MIDIMultiTrack *mlt ) 
{
  
  fprintf( stdout , "Clocks per beat: %d\n\n", mlt->GetClksPerBeat() );
  
  for( int i=0; i<mlt->GetNumTracks(); ++i )
  {
    if( mlt->GetTrack(i)->GetNumEvents() > 0 )
    {
      fprintf( stdout, "DUMP OF TRACK #%2d:\n", i );
      DumpMIDITrack( mlt->GetTrack(i) );
      fprintf( stdout, "\n" );
    }
    
  }
  
} 

void DumpMIDIMultiTrack( MIDIMultiTrack *mlt ) 
{
  MIDIMultiTrackIterator i( mlt );
  MIDITimedBigMessage *msg;
  
  fprintf( stdout , "Clocks per beat: %d\n\n", mlt->GetClksPerBeat() );
  
  i.GoToTime(0);
  
  do
  {
    int trk_num;
    
    if( i.GetCurEvent(&trk_num, &msg ) )
    {
      fprintf( stdout, "#%2d - ", trk_num );
      DumpMIDITimedBigMessage( msg );
    }       
  } while( i.GoToNextEvent() );
  
} 

void PlayDumpSequencer( MIDISequencer *seq ) 
{ 
  float pretend_clock_time = 0.0;
  float next_event_time = 0.0;
  MIDITimedBigMessage ev;
  int ev_track;
  
  seq->GoToTimeMs( pretend_clock_time );
  
  if( !seq->GetNextEventTimeMs( &next_event_time ) )
  {
    return;
  }
  
  // simulate a clock going forward with 10ms resolution for 1 minute
  
  for( ; pretend_clock_time<60.0*1000.0; pretend_clock_time+=10.0 )
  {
    
    // find all events that came before or a the current time
    
    while( next_event_time <= pretend_clock_time )
    {
      if( seq->GetNextEvent( &ev_track, &ev ) )
      {
        // found the event!
        // show it to stdout
        
        fprintf( stdout, "tm=%06.0f : evtm=%06.0f :trk%02d : ",
                 pretend_clock_time, next_event_time, ev_track );
        
        DumpMIDITimedBigMessage( &ev );
        
        // now find the next message
        
        if( !seq->GetNextEventTimeMs( &next_event_time ) )
        {
          // no events left so end
          
          fprintf( stdout, "End\n" );
          return;
        }
        
      }     
    }   
  }
  
  
} 


int main( int argc, char **argv )
{
  if( argc>1 )
  {   
    MIDIFileReadStreamFile rs( argv[1] );
    MIDIMultiTrack tracks(64);
    MIDIFileReadMultiTrack track_loader( &tracks );
    MIDIFileRead reader( &rs, &track_loader );
    MIDISequencer seq( &tracks );   
    
    reader.Parse();
    
    //DumpMIDIMultiTrack( &tracks );
    
    
    PlayDumpSequencer( &seq );
  }
  
  return 0;   
}