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How to randomize songs in a Flash Jukebox - conntected to an XML databse

Jun 16, 2012 1:30 PM

Tags: #as3 #randomize_songs

Hey there all!,

I have been making a Jukebox in flash but I got stucked at roandomizing the songs - every song must be played randomized before it's allowed to be played a 2nd tim -

Some people told me to do this with an Array, but I am pretty new in this so I have NO CLUE how.

 

Please help me as soon as possible, it's urgent !

 

Heavinly much thanks in Advance

 

p.s: This is the flash code I got for my Jukebox :

 

var my_songs:XMLList;

var my_total:Number;

 

 

var my_sound:Sound;

var my_channel:SoundChannel;

 

 

var current_song:Number = 0;

 

 

var song_position:Number;

var song_paused:Boolean;

 

 

var myXMLLoader:URLLoader = new URLLoader(); // naakt een nieuwe XML loader

myXMLLoader.load(new URLRequest("playlist.xml")); // load playlist.xml

myXMLLoader.addEventListener(Event.COMPLETE, processXML); // event aan maken

 

 

 

 

function processXML (e:Event):void // roept funcite aan

{

          var myXML:XML = new XML(e.target.data);

 

          my_songs = myXML.SONG;

          my_total = my_songs.length();

          playSong(1);

}

 

 

function playSong(mySong:Number):void

{

var myTitle = my_songs[mySong].@TITLE;

var myArtist = my_songs[mySong].@ARTIST;

var myURL = my_songs[mySong].@URL;

 

 

          title_txt.text = myTitle;

          artist_txt.text = myArtist;

 

 

          if (my_channel)

          {

                    my_channel.stop();

          }

 

 

          my_sound = new Sound();

          my_sound.load(new URLRequest(myURL));

          my_channel = my_sound.play();

          my_channel.addEventListener(Event.SOUND_COMPLETE, onNext);

}

 

 

next_btn.addEventListener(MouseEvent.CLICK, onNext);

function onNext(e:Event):void

{

          current_song++;

          if (current_song>=my_total)

          {

                    current_song=0;

          }

          playSong(current_song);

}

 

 

prev_btn.addEventListener(MouseEvent.CLICK, onPrev);

function onPrev(e:MouseEvent):void

{

          current_song--;

          if (current_song<0)

          {

                    current_song = my_total-1;

          }

          playSong(current_song);

}

 

 

pause_btn.addEventListener(MouseEvent.CLICK, onPause);

function onPause(e:MouseEvent):void

{

          if (my_channel)

          {

                    song_position = my_channel.position;

                    my_channel.stop();

                    song_paused=true;

          }

}

play_btn.addEventListener(MouseEvent.CLICK, onPlay);

function onPlay(e:MouseEvent):void

{

          if (song_paused)

          {

                    my_channel = my_sound.play(song_position);

                    song_paused=false;

          }

}

692 Views   8 Replies   Latest reply: Clotexl, Jun 18, 2012 1:08 AM
 
Replies
  • Ned Murphy
    Currently Being Moderated
    1. Ned Murphy,
    Jun 16, 2012 2:15 PM   in reply to Clotexl
    Report

    What you could do (to keep most of the approach you currently have, it to create a new array that just holds the numbers for the songs and then shuffle that array to randomize it.  The new code is shown in bold below

     

    var singNums:Array = new Array();

     

    function processXML (e:Event):void // roept funcite aan

    {

              var myXML:XML = new XML(e.target.data);

     

              my_songs = myXML.SONG;

              my_total = my_songs.length();

     

     

         for(var i:uint=0; i<my_total; i++){

                   songNums.push(i);  // this just builds an array of numbers [0,1,2,3,4,....]

         }

     

        shuffle(songNums);  // randomizes the numbers in the array

     

        playSong(songNums[current_song] );

     

    }

     

    function shuffle(a:Array) {

        var p:int;

        var t:*;

        var ivar:int;

        for (ivar = a.length-1; ivar>=0; ivar--) {

            p=Math.floor((ivar+1)*Math.random());

            t = a[ivar];

            a[ivar] = a[p];

            a[p] = t;

        }

    }

     
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  • Clotexl
    Currently Being Moderated
    2. Clotexl,
    Jun 17, 2012 3:22 AM   in reply to Ned Murphy
    Report

    I putted it into my code and that made me this :

    var my_songs:XMLList;

    var my_total:Number;

     

     

    var my_sound:Sound;

    var my_channel:SoundChannel;

     

     

    var current_song:Number = 0;

     

     

    var song_position:Number;

    var song_paused:Boolean;

     

     

    var myXMLLoader:URLLoader = new URLLoader(); // naakt een nieuwe XML loader

    myXMLLoader.load(new URLRequest("playlist.xml")); // load playlist.xml

    myXMLLoader.addEventListener(Event.COMPLETE, processXML); // event aan maken

     

     

     

     

    var singNums:Array = new Array();

     

    function processXML (e:Event):void // roept funcite aan

    {

              var myXML:XML = new XML(e.target.data);

     

              my_songs = myXML.SONG;

              my_total = my_songs.length();

     

     

         for(var i:uint=0; i<my_total; i++){

                   songNums.push(i);  // this just builds an array of numbers [0,1,2,3,4,....]

         }

     

        shuffle(songNums);  // randomizes the numbers in the array

     

        playSong(songNums[current_song] );

     

    }

     

    function shuffle(a:Array) {

        var p:int;

        var t:*;

        var ivar:int;

        for (ivar = a.length-1; ivar>=0; ivar--) {

            p=Math.floor((ivar+1)*Math.random());

            t = a[ivar];

            a[ivar] = a[p];

            a[p] = t;

        }

    }

     

     

     

     

    function playSong(mySong:Number):void

    {

    var myTitle = my_songs[mySong].@TITLE;

    var myArtist = my_songs[mySong].@ARTIST;

    var myURL = my_songs[mySong].@URL;

     

     

              title_txt.text = myTitle;

              artist_txt.text = myArtist;

     

     

              if (my_channel)

              {

                        my_channel.stop();

              }

     

     

              my_sound = new Sound();

              my_sound.load(new URLRequest(myURL));

              my_channel = my_sound.play();

              my_channel.addEventListener(Event.SOUND_COMPLETE, onNext);

    }

     

     

    next_btn.addEventListener(MouseEvent.CLICK, onNext);

    function onNext(e:Event):void

    {

              current_song++;

              if (current_song>=my_total)

              {

                        current_song=0;

              }

              playSong(current_song);

    }

     

     

    prev_btn.addEventListener(MouseEvent.CLICK, onPrev);

    function onPrev(e:MouseEvent):void

    {

              current_song--;

              if (current_song<0)

              {

                        current_song = my_total-1;

              }

              playSong(current_song);

    }

     

     

    pause_btn.addEventListener(MouseEvent.CLICK, onPause);

    function onPause(e:MouseEvent):void

    {

              if (my_channel)

              {

                        song_position = my_channel.position;

                        my_channel.stop();

                        song_paused=true;

              }

    }

    play_btn.addEventListener(MouseEvent.CLICK, onPlay);

    function onPlay(e:MouseEvent):void

    {

              if (song_paused)

              {

                        my_channel = my_sound.play(song_position);

                        song_paused=false;

              }

    }

     

    I am getting 3 errrors :

    Scene 1, layer 'action', frame 1, sentence 28   1120: Using undefined songNums

    Scene 1, layer 'action', frame 1, sentence 31   1120: Using undefined songNums

    Scene 1, layer 'action', frame 1, sentence 33   1120: Using undefined songNums

     

     

    How can I fix this?

     

    Many thanks in advance!

     
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  • Ned Murphy
    Currently Being Moderated
    3. Ned Murphy,
    Jun 17, 2012 4:18 AM   in reply to Clotexl
    Report

    There is a typo in my earlier reply... "singNums" should be "songNums"

     
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  • Clotexl
    Currently Being Moderated
    4. Clotexl,
    Jun 17, 2012 6:02 AM   in reply to Ned Murphy
    Report

    I have added the code, but he keeps doing the same as before:

     

    number 1 then 2 then 3 it doesn't randomize... and neither its giving an error since i fixed that typo....

     

    Any clue?

     

    I'll post the code again :

    var my_songs:XMLList;

    var my_total:Number;

     

     

    var my_sound:Sound;

    var my_channel:SoundChannel;

     

     

    var current_song:Number = 0;

     

     

    var song_position:Number;

    var song_paused:Boolean;

     

     

    var myXMLLoader:URLLoader = new URLLoader(); // naakt een nieuwe XML loader

    myXMLLoader.load(new URLRequest("playlist.xml")); // load playlist.xml

    myXMLLoader.addEventListener(Event.COMPLETE, processXML); // event aan maken

     

     

     

     

    var songNums:Array = new Array();

     

    function processXML (e:Event):void // roept funcite aan

    {

              var myXML:XML = new XML(e.target.data);

     

              my_songs = myXML.SONG;

              my_total = my_songs.length();

     

     

         for(var i:uint=0; i<my_total; i++){

                   songNums.push(i);  // this just builds an array of numbers [0,1,2,3,4,....]

         }

     

        shuffle(songNums);  // randomizes the numbers in the array

     

        playSong(songNums[current_song] );

     

    }

     

    function shuffle(a:Array) {

        var p:int;

        var t:*;

        var ivar:int;

        for (ivar = a.length-1; ivar>=0; ivar--) {

            p=Math.floor((ivar+1)*Math.random());

            t = a[ivar];

            a[ivar] = a[p];

            a[p] = t;

        }

    }

     

     

     

     

    function playSong(mySong:Number):void

    {

    var myTitle = my_songs[mySong].@TITLE;

    var myArtist = my_songs[mySong].@ARTIST;

    var myURL = my_songs[mySong].@URL;

     

     

              title_txt.text = myTitle;

              artist_txt.text = myArtist;

     

     

              if (my_channel)

              {

                        my_channel.stop();

              }

     

     

              my_sound = new Sound();

              my_sound.load(new URLRequest(myURL));

              my_channel = my_sound.play();

              my_channel.addEventListener(Event.SOUND_COMPLETE, onNext);

    }

     

     

    next_btn.addEventListener(MouseEvent.CLICK, onNext);

    function onNext(e:Event):void

    {

              current_song++;

              if (current_song>=my_total)

              {

                        current_song=0;

              }

              playSong(current_song);

    }

     

     

    prev_btn.addEventListener(MouseEvent.CLICK, onPrev);

    function onPrev(e:MouseEvent):void

    {

              current_song--;

              if (current_song<0)

              {

                        current_song = my_total-1;

              }

              playSong(current_song);

    }

     

     

    pause_btn.addEventListener(MouseEvent.CLICK, onPause);

    function onPause(e:MouseEvent):void

    {

              if (my_channel)

              {

                        song_position = my_channel.position;

                        my_channel.stop();

                        song_paused=true;

              }

    }

    play_btn.addEventListener(MouseEvent.CLICK, onPlay);

    function onPlay(e:MouseEvent):void

    {

              if (song_paused)

              {

                        my_channel = my_sound.play(song_position);

                        song_paused=false;

              }

    }

     

    dont forget the mp3 files are linked through xml

     

    thanks in advance

     
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  • Ned Murphy
    Currently Being Moderated
    5. Ned Murphy,
    Jun 17, 2012 7:18 AM   in reply to Clotexl
    Report

    Anywhere you are calling the playSong function you need to use what I showed in the processXML function...

     

    playSong(songNums[current_song] );   // not: playSong(current_song);

     
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  • Clotexl
    Currently Being Moderated
    6. Clotexl,
    Jun 17, 2012 8:33 AM   in reply to Ned Murphy
    Report

    I got that done giving me this code, but still not doing its job

     

    var my_songs:XMLList;

    var my_total:Number;

     

     

    var my_sound:Sound;

    var my_channel:SoundChannel;

     

     

    var current_song:Number = 0;

     

     

    var song_position:Number;

    var song_paused:Boolean;

     

     

    var myXMLLoader:URLLoader = new URLLoader(); // naakt een nieuwe XML loader

    myXMLLoader.load(new URLRequest("playlist.xml")); // load playlist.xml

    myXMLLoader.addEventListener(Event.COMPLETE, processXML); // event aan maken

     

     

     

     

    var songNums:Array = new Array();

     

    function processXML (e:Event):void // roept funcite aan

    {

              var myXML:XML = new XML(e.target.data);

     

              my_songs = myXML.SONG;

              my_total = my_songs.length();

     

     

         for(var i:uint=0; i<my_total; i++){

                   songNums.push(i);  // this just builds an array of numbers [0,1,2,3,4,....]

         }

     

        shuffle(songNums);  // randomizes the numbers in the array

     

        playSong(songNums[current_song]);

     

    }

     

    function shuffle(a:Array) {

        var p:int;

        var t:*;

        var ivar:int;

        for (ivar = a.length-1; ivar>=0; ivar--) {

            p=Math.floor((ivar+1)*Math.random());

            t = a[ivar];

            a[ivar] = a[p];

            a[p] = t;

        }

    }

     

     

     

     

    function playSong(mySong:Number):void

    {

    var myTitle = my_songs[mySong].@TITLE;

    var myArtist = my_songs[mySong].@ARTIST;

    var myURL = my_songs[mySong].@URL;

     

     

              title_txt.text = myTitle;

              artist_txt.text = myArtist;

     

     

              if (my_channel)

              {

                        my_channel.stop();

              }

     

     

              my_sound = new Sound();

              my_sound.load(new URLRequest(myURL));

              my_channel = my_sound.play();

              my_channel.addEventListener(Event.SOUND_COMPLETE, onNext);

    }

     

     

    next_btn.addEventListener(MouseEvent.CLICK, onNext);

    function onNext(e:Event):void

    {

              current_song++;

              if (current_song>=my_total)

              {

                        current_song=0;

              }

              playSong(songNums[current_song]);

    }

     

     

    prev_btn.addEventListener(MouseEvent.CLICK, onPrev);

    function onPrev(e:MouseEvent):void

    {

              current_song--;

              if (current_song<0)

              {

                        current_song = my_total-1;

              }

              playSong(songNums[current_song]);

    }

     

     

    pause_btn.addEventListener(MouseEvent.CLICK, onPause);

    function onPause(e:MouseEvent):void

    {

              if (my_channel)

              {

                        song_position = my_channel.position;

                        my_channel.stop();

                        song_paused=true;

              }

    }

    play_btn.addEventListener(MouseEvent.CLICK, onPlay);

    function onPlay(e:MouseEvent):void

    {

              if (song_paused)

              {

                        my_channel = my_sound.play(song_position);

                        song_paused=false;

              }

    }

     
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  • Ned Murphy
    Currently Being Moderated
    7. Ned Murphy,
    Jun 17, 2012 9:52 AM   in reply to Clotexl
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    You'll have to use the trace() function to follow thru the processing to see where things are not processing as they should.  Try tracing the singNums array before and after shuffling to make sure it is getting shuffled. Then try tracing the calls to the playSong function to see what the value of mySong is.  Keep poking around until you find something that doesn't do what you expect it should..

     
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  • Clotexl
    Currently Being Moderated
    8. Clotexl,
    Jun 18, 2012 1:08 AM   in reply to Ned Murphy
    Report

    He starts with a random song but then just follows the track list ^^ I want it to keep randomizing:)

     
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