Multi Audio Player

[Flep]

MULTI AUDIO PLAYER

web audio player

Description

Lettore audio mp3

Legge da file XML i brani delle canzoni

Files package

main.fla

Main.as

LoadingXML.as

Grafico.as

canzoni.xml

leggimi.txt

Important : Open the file LoadingXML.as and change the url to XML file..

XML file:

4 attributes: artista, album, titolo, url

Click here to view XML file

Source files:

[gwulfwud]

hey flep..what is the removeEventListener for?

private function cambiaCanzone(n:Number):void
{
pausa_mc.visible=false;
pausa_mc.stop();
channel.removeEventListener(Event.SOUND_COMPLETE,s oundComplete);
timer.stop();
initTimer();
isPause=false;
channel.stop();
position=0;
sound=new Sound(new URLRequest(links_array[n]));
channel=sound.play();
channel.addEventListener(Event.SOUND_COMPLETE,soun dComplete);
playing=true;
isPause=false;
}

[Flep]

If you don't need anymore of a listener, remove it.
You gain memory and better performance.

The function cambiaCanzone ( changeSong ) changes the mp3, so i want remove the listener of the last mp3.

[gwulfwud]

nice.. thank you sir!

[gwulfwud]

hey flep, got a quick question...so is putting alot of eventlisteners going to be a big problem for the cpu usage? if it is what is another option for an eventlistener for a button?

[Flep]

AddEventListener is fine

[gwulfwud]

thank you! now i can feel im doing the right thing !! =D

thanks for your help

[gwulfwud]

hey flep,

got another problem. well, i don't really know how to go about this...so the issue is, after the songs finishes how can my player detect that the sound is completed and go to the next song? should i use another addeventlistener? i looked into the source files of your multi audio player and it's displaying the eventlistener SOUND_COMPLETE. but then you remove it first then add it again...i got confused with that..can you please explain?


Thank you.
g

[Flep]

Hi,
SOUND_COMPLETE is what you need.
I removed it when you change the song.

I think he why is pretty logic , if i change the song, i instanciate a new Sound and a new ChannelSound. So, remove every listener and add new listeners.

[gwulfwud]

thanks flep!

got another problem though..

package com.externalFiles
{
       
    import flash.display.MovieClip;
    import flash.display.SimpleButton;
    import flash.media.Sound;
    import flash.media.SoundChannel;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.events.TimerEvent;
    import flash.events.ContextMenuEvent;
    import flash.net.URLRequest;
    
    public class gwPlayerv2 extends MovieClip
    {        
        //modify for xml based mp3
        private var xml:loadsXML;
        public var object_array:Array;
        public var link_array:Array;
        //public var temp_url:String;
        public var totalSong:int;
        
        //sound baryabowls!!
        private var _channel:SoundChannel;
        private var _sound:Sound;
        private var _playing:Boolean;
        //initialize position of the sound (kung sang segundo na ung tugtog
        private var _sposition:int=0;
        private var _songNumber:int=0;
        
        public function gwPlayerv2()
        {
            initVar();
            initButtons();
            kuhaXML();
        }
        
        //simulan ang variables for multiple songs
        public function initVar():void
        {
            //url=new Array();
            object_array=new Array();
            link_array=new Array();
            _playing=false;
        }
        
        private function kuhaXML():void
        {
            xml=new loadsXML(this);
            trace('kuha XML link_array '+link_array);
            trace('total song '+totalSong);
        }
    
                
//*--FIX BUTTONS--**********************************************************************************************************//                
        //initialize buttons
        public function initButtons():void
        {
            playSound.addEventListener(MouseEvent.MOUSE_OVER,chPlayImage);
            pauseSound.addEventListener(MouseEvent.MOUSE_OVER,chPauseImage);
            stopSound.addEventListener(MouseEvent.MOUSE_OVER,chStopImage);
            forwardSound.addEventListener(MouseEvent.MOUSE_OVER,chForwardImage);
            
            playSound.addEventListener(MouseEvent.MOUSE_UP,playSong);
            pauseSound.addEventListener(MouseEvent.MOUSE_UP,pauseSong);
            stopSound.addEventListener(MouseEvent.MOUSE_UP,stopSong);
            forwardSound.addEventListener(MouseEvent.MOUSE_UP,forwardSong);
        }
        
        //change button's images
        public function chPlayImage(event:Event):void
        {
            trace('Mouse Over PLAY');
            trace('link_array '+link_array[0]);
        }
        
        public function chPauseImage(event:Event):void
        {
            trace('Mouse Over PAUSE');
        }
        
        public function chStopImage(event:Event):void
        {
            trace('Mouse Over STOP');
        }
        
        public function chForwardImage(event:Event):void
        {
            trace('Mouse Over FORWARD');
        }
        
        //play song function. pag napindot ung play button
        public function playSong(event:MouseEvent):void
        {
            if(_playing)
            {
                //do nothing since it's already playing
                trace('Music already playing');
                //_channel.addEventListener(Event.SOUND_COMPLETE,songFinish);
            }
            else
            {
                //_channel.stop();
                //para iplay kung san ka nagpause
                //_channel=_sound.play(_sposition);
                _playing=true;    
                //_songNumber=0;
                initSound(_songNumber);
                trace('Music not playing');
            }
        }
        //pause song function
        public function pauseSong(event:MouseEvent):void
        {
            if(_playing)
            {
                _sposition=_channel.position;
                _channel.stop();                
            }
            else
            {
                _channel=_sound.play(_sposition);
            }
            _playing=!_playing;
        }
        //stop song
        public function stopSong(event:MouseEvent):void
        {
            _channel.stop();
            _sposition=0;
            _playing=false;
        }
        
        //forward song
        public function forwardSong(event:MouseEvent):void
        {
            if (_songNumber
            {
                _channel.removeEventListener(Event.SOUND_COMPLETE,songFinish);
                _songNumber=_songNumber+1;
                _channel.stop();
                _sposition=0;
                trace ('IF forward sound position '+_channel.position);
                trace ('forward songnumber '+_songNumber);    
                trace ('forward total song '+totalSong);    
                initSound(_songNumber);
                _channel.addEventListener(Event.SOUND_COMPLETE,songFinish);
            }
            else
            {
                _channel.removeEventListener(Event.SOUND_COMPLETE,songFinish);
                _songNumber=0;
                _channel.stop();
                _sposition=0;
                trace ('forward sound position '+_sposition);
                trace ('ELSE forward total song '+totalSong);    
                initSound(_songNumber);
                _channel.addEventListener(Event.SOUND_COMPLETE,songFinish);
            }
            
        }

//*--PLAY SONG--***********************************************************************************************************//                
        //initialize song function
        private function initSound(n:Number):void
        {
            _channel.removeEventListener(Event.SOUND_COMPLETE,songFinish);
            _sound=new Sound(new URLRequest(link_array[n]));
            trace ('sound position '+_sposition);
            _channel=_sound.play(_sposition);
            _playing=true;
            _channel.addEventListener(Event.SOUND_COMPLETE,songFinish);
        }
        
        /*private function playSound():void
        {
            _channel=_sound.play();
        }*/
        private function songFinish(e:Event):void
        {
            if (_songNumber
            {
                _channel.removeEventListener(Event.SOUND_COMPLETE,songFinish);
                _songNumber=_songNumber+1;
                _channel.stop();
                _sposition=0;
                trace ('IF forward sound position '+_channel.position);
                trace ('forward songnumber '+_songNumber);    
                trace ('forward total song '+totalSong);    
                initSound(_songNumber);
                _channel.addEventListener(Event.SOUND_COMPLETE,songFinish);
            }
            else
            {
                _channel.removeEventListener(Event.SOUND_COMPLETE,songFinish);
                _songNumber=0;
                _channel.stop();
                _sposition=0;
                trace ('forward sound position '+_sposition);
                trace ('ELSE forward total song '+totalSong);    
                initSound(_songNumber);
                _channel.addEventListener(Event.SOUND_COMPLETE,songFinish);
            }
        }
    }
}

now i get this error

TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at com.externalFiles::gwPlayerv2/::initSound()
    at com.externalFiles::gwPlayerv2/playSong()

now i know my logic is right that everytime you click the play song it will remove the listener first then sets up the variables and instances and then adds the listener again..now what i don't know why is that it keeps throwing the null method..