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/***************************************************************************/
/*                                                                         */
/* (c) Copyright IBM Corp. 2001  All rights reserved.                      */
/*                                                                         */
/* This sample program is owned by International Business Machines         */
/* Corporation or one of its subsidiaries ("IBM") and is copyrighted       */
/* and licensed, not sold.                                                 */
/*                                                                         */
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/* using, marketing or distributing programs that include or are           */
/* derivative works of the sample program.                                 */
/*                                                                         */
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/* implied warranties, so the above limitations or exclusions may not      */
/* apply to you.  IBM shall not be liable for any damages you suffer as    */
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/* its derivatives.                                                        */
/*                                                                         */
/* Each copy of any portion of this sample program or any derivative       */
/* work,  must include the above copyright notice and disclaimer of        */
/* warranty.                                                               */
/*                                                                         */
/***************************************************************************/

/***************************************************************************/
/*                                                                         */
/* This file accompanies the article "Understanding and using Java MIDI    */
/* audio." This article was published in the Special Edition 2001 issue    */
/* of the IBM DeveloperToolbox Technical Magazine at                       */
/* http://www.developer.ibm.com/devcon/mag.htm.                            */
/*                                                                         */
/***************************************************************************/

//------------------------------------------------------------------------
// File Name:     SequenceInfo 
// Description:   Reports the sequence info in a Midi file.
//------------------------------------------------------------------------

import java.io.File;
import java.io.IOException;

import javax.sound.midi.*;

/**
 * SequenceInfo - allows you to view sequence information in a Midi file.
 * @author Dan Becker
 */
public class SequenceInfo {

   public static void main( String [] args ) throws IOException, InvalidMidiDataException {
      if ( args.length != 1 ) {
         System.out.println( "SequenceInfo - allows you to view sequence information in a Midi file." );
         System.out.println( "   usage: java <MIDI filename>" );
         System.exit( 1 );
      }

      // Convert the argument into a file for the sequencer.
      String fileName = args[ 0 ];
      File midiFile = new File( fileName );
      System.out.println( "Sequence file name: " + fileName );
   
      // Using MidiSystem, convert the file to a sequence.
      Sequence sequence = MidiSystem.getSequence( midiFile );
      if (sequence != null) {
         // Print sequence information
         System.out.println( "   length: " + sequence.getTickLength() + " ticks" );
         System.out.println( "   duration: " + sequence.getMicrosecondLength() + " micro seconds" );
         System.out.println( "   division type: " + divisionTypeToString( sequence.getDivisionType() ) );
         String resUnits = ( sequence.getDivisionType() == Sequence.PPQ ) ? " ticks per beat" : " ticks per frame";
         System.out.println( "   resolution: " + sequence.getResolution() + resUnits );

         // Print patch information         
         Patch [] patches = sequence.getPatchList();
         if ( patches != null ) {
            for ( int i = 0; i < patches.length; i++ ) {
               Patch patch = patches[ i ];
               System.out.println( "      patch " + i + ": " + " bank " + patch.getBank() + ", program " + patch.getProgram() );
            } // for
         } // if

         // Print track information         
         Track [] tracks = sequence.getTracks();
         if ( tracks != null ) {
            for ( int i = 0; i < tracks.length; i++ ) {
               System.out.println( "Track " + i + ":" );
               Track track = tracks[ i ];
               for ( int j = 0; j < track.size(); j++ ) {
                  MidiEvent event = track.get( j );
                  System.out.println( "   tick " + event.getTick() + ", " + MessageInfo.toString( event.getMessage() ) );
               } // for
            } // for
         } // if
      } else {
         System.out.println( "   Sequence is null." );
      } // if
   } // main

   /** Returns a string version of the division type. */
   public static String divisionTypeToString( float divisionType ) {
      if ( divisionType == Sequence.PPQ) {
         return "PPQ";
      } else if ( divisionType == Sequence.SMPTE_24 ) {
         return "SMPTE, 24 frames per second";
      } else if ( divisionType == Sequence.SMPTE_25) {
         return "SMPTE, 25 frames per second";
      } else if ( divisionType == Sequence.SMPTE_30DROP ) {
         return "SMPTE, 29.97 frames per second";
      } else if ( divisionType == Sequence.SMPTE_30) {
         return "SMPTE, 30 frames per second";
      }
      return "unknown division type";
   } // divisionTypeToString
} // class SequenceInfo
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