MP3 Player in AS3 Flash CS5 with autoresume feature?

Question

I created a web site with an MP3 player on several of the pages. I created the player using AS3 in Flash CS5 Professional. It has a volume slider on it that I set the initial value to 2. It music that is loaded is identified in an XML file. If the user changes the volume, pauses or stops the music, I want to use autoresume (or something equivalent) to make sure the player continues in the same status across pages.The player is embeded on the pages using SWFObject.
I have searched for several days on the web trying to find a solution and have not found one. I don't know if there is something I need to do in AS3, in Flash, on my pages or if it can be handled in PHP or XML. Does anyone know a good approach?

Answer 1

Thank you for your help. I put the code in and it works except for one thing, the position of the slider does not change when I bring the player up the second time, it is always set to the default position. I do not know what value to store and reset for the slider position.
I have three different books that I have searched and I have searched on the Internet but cannot find the answer. I have pasted the Action Script below. I hope you can help me. In the meantime, I will continue to look more myself. Thank you again.
import flash.display.DisplayObject;
import fl.events.SliderEvent;
import flash.media.SoundTransform;
import flash.net.SharedObject;
// rewind and fast forward rate
const SEARCH_RATE:int = 3000;
// XML file that holds reference to the mp3 files and used to load the tracks
const XML_FILE:String = "tracks.xml";
const FORWARD:String = "forward";
const BACKWARD:String = "backward";
var playDirection:String;
var index:Number = 0;
var trackPos:Number = 0;
var trackOn:Boolean = false;
var trackXML:XML;
var trackList:XMLList;
var urlRequest:URLRequest;
var urlLoader:URLLoader;
var track:Sound = new Sound  ;
var newTrack:Sound;
var newUrlRequest:URLRequest;
var chan:SoundChannel = new SoundChannel  ;
var context:SoundLoaderContext = new SoundLoaderContext(7000,false);
var trackTimer:Timer = new Timer(200);
var trans:SoundTransform;
var mySO:SharedObject = SharedObject.getLocal("MP3Vol");
var currVol:Number = mySO.data.MP3CurrVol;
if (!mySO.data.MP3CurrVol) {
    currVol = .2;
// create a new URLRequest object and use to reference the XML file
urlRequest = new URLRequest(XML_FILE);
// create a new URLLoader object to load the XML file
urlLoader = new URLLoader(urlRequest);
urlLoader.addEventListener(Event.COMPLETE, onceLoaded);
urlLoader.load(urlRequest);
//listener for the volume slider;
volSlide.addEventListener(SliderEvent.CHANGE, volumeChange);
function onceLoaded(e:Event):void
    trackXML = new XML(e.target.data);
    trackList = trackXML.track;
    urlRequest = new URLRequest(trackList[index].path);
    trans = new SoundTransform(currVol);
    track.addEventListener(Event.COMPLETE, trackCompleteHandler);
    track.addEventListener(ProgressEvent.PROGRESS, trackProgressHandler);
    track.load(urlRequest, context);
    chan = track.play(trackPos);
    chan.soundTransform = trans;
    chan.addEventListener(Event.SOUND_COMPLETE, playNext);
function trackCompleteHandler(e:Event):void
    trackOn = true;
    title_txt.text = trackList[index].title;
    performer_txt.text = trackList[index].performer;
    e.target.removeEventListener(Event.COMPLETE, trackCompleteHandler);
    e.target.removeEventListener(ProgressEvent.PROGRESS, trackProgressHandler);
function trackProgressHandler(pe:ProgressEvent):void
    var percent:int = (pe.target.bytesLoaded / pe.target.bytesTotal) * 100;
    performer_txt.text = "Loading...";
    title_txt.text = percent + "%";
play_mc.addEventListener(MouseEvent.CLICK, playTrack);
stop_mc.addEventListener(MouseEvent.CLICK, stopTrack);
next_mc.addEventListener(MouseEvent.CLICK, nextTrack);
prev_mc.addEventListener(MouseEvent.CLICK, prevTrack);
pause_mc.addEventListener(MouseEvent.CLICK, pauseTrack);
ffwrd_mc.addEventListener(MouseEvent.CLICK, ffwrdTrack);
rewind_mc.addEventListener(MouseEvent.CLICK, rwndTrack);
function playTrack(e:MouseEvent):void
    trackTimer.stop();
    if (! trackOn)
        newUrlRequest = new URLRequest(trackXML.track[index].path);
        newTrack = new Sound  ;
        newTrack.addEventListener(Event.COMPLETE, trackCompleteHandler);
        newTrack.addEventListener(ProgressEvent.PROGRESS, trackProgressHandler);
        newTrack.load(newUrlRequest, context);
        chan = newTrack.play(trackPos);
        chan.soundTransform = trans;
        chan.addEventListener(Event.SOUND_COMPLETE, playNext);
        play_mc.removeEventListener(MouseEvent.CLICK, playTrack);
function stopTrack(e:MouseEvent):void
    trackTimer.stop();
    if (trackOn)
        chan.stop();
        trackOn = false;
        play_mc.visible = true;
        play_mc.addEventListener(MouseEvent.CLICK, playTrack);
    trackPos = 0;
function nextTrack(e:MouseEvent):void
    if (index < trackList.length() - 1)
        index++;
    else
        index = 0;
    trackPos = 0;
    chan.stop();
    newUrlRequest = new URLRequest(trackList[index].path);
    newTrack = new Sound  ;
    newTrack.addEventListener(Event.COMPLETE, trackCompleteHandler);
    newTrack.addEventListener(ProgressEvent.PROGRESS, trackProgressHandler);
    newTrack.load(newUrlRequest, context);
    chan = newTrack.play(trackPos);
    chan.soundTransform = trans;
    chan.addEventListener(Event.SOUND_COMPLETE, playNext);
    track = newTrack;
function prevTrack(e:MouseEvent):void
    if (index > 0)
        index--;
    else
        index = trackList.length() - 1;
    trackPos = 0;
    chan.stop();
    newUrlRequest = new URLRequest(trackList[index].path);
    newTrack = new Sound  ;
    newTrack.addEventListener(Event.COMPLETE, trackCompleteHandler);
    newTrack.addEventListener(ProgressEvent.PROGRESS, trackProgressHandler);
    newTrack.load(newUrlRequest, context);
    chan = newTrack.play(trackPos);
    chan.soundTransform = trans;
    chan.addEventListener(Event.SOUND_COMPLETE, playNext);
    track = newTrack;
function pauseTrack(e:MouseEvent):void
    if (trackOn)
        trackPos = chan.position;
        chan.stop();
        play_mc.visible = true;
        play_mc.addEventListener(MouseEvent.CLICK, playTrack);
        trackOn = false;
function ffwrdTrack(e:MouseEvent):void
    if (trackOn)
        playDirection = FORWARD;
        trackTimer.addEventListener(TimerEvent.TIMER, trackSearch);
        trackTimer.start();
function rwndTrack(e:MouseEvent):void
    if (trackOn)
        playDirection = BACKWARD;
        trackTimer.addEventListener(TimerEvent.TIMER, trackSearch);
        trackTimer.start();
function trackSearch(te:TimerEvent):void
    trackPos = chan.position;
    chan.stop();
    chan.removeEventListener(Event.SOUND_COMPLETE, playNext);
    if (playDirection == FORWARD)
        if (trackPos + SEARCH_RATE < track.length)
            trackPos +=  SEARCH_RATE;
            chan = track.play(trackPos);
            chan.soundTransform = trans;
            chan.addEventListener(Event.SOUND_COMPLETE, playNext);
        else
            if (index < trackList.length() - 1)
                index++;
            else
                trackPos = 0;
                chan.stop();
                newUrlRequest = new URLRequest(trackList[index].path);
                newTrack = new Sound  ;
                newTrack.addEventListener(Event.COMPLETE, trackCompleteHandler);
                newTrack.addEventListener(ProgressEvent.PROGRESS, trackProgressHandler);
                newTrack.load(newUrlRequest, context);
                chan = newTrack.play(trackPos);
                chan.soundTransform = trans;
                chan.addEventListener(Event.SOUND_COMPLETE, playNext);
                track = newTrack;
                te.target.stop();
                te.target.removeEventListener(TimerEvent.TIMER, trackSearch);
    else if (playDirection == BACKWARD)
        if (trackPos - SEARCH_RATE > 0)
            trackPos -=  SEARCH_RATE;
            chan = track.play(trackPos);
            chan.soundTransform = trans;
            chan.addEventListener(Event.SOUND_COMPLETE, playNext);
        else
            if (index > 0)
                index--;
            else
                index = trackList.length() - 1;
            trackPos = 0;
            chan.stop();
            newUrlRequest = new URLRequest(trackList[index].path);
            newTrack = new Sound  ;
            newTrack.addEventListener(Event.COMPLETE, trackCompleteHandler);
            newTrack.addEventListener(ProgressEvent.PROGRESS, trackProgressHandler);
            newTrack.load(newUrlRequest, context);
            chan = newTrack.play(trackPos);
            chan.soundTransform = trans;
            chan.addEventListener(Event.SOUND_COMPLETE, playNext);
            track = newTrack;
            te.target.stop();
            te.target.removeEventListener(TimerEvent.TIMER, trackSearch);
function playNext(e:Event):void
    if (index < trackList.length() - 1)
        index++;
    else
        index = 0;
    trackPos = 0;
    chan.stop();
    chan.removeEventListener(Event.SOUND_COMPLETE, playNext);
    newUrlRequest = new URLRequest(trackList[index].path);
    newTrack = new Sound  ;
    newTrack.addEventListener(Event.COMPLETE, trackCompleteHandler);
    newTrack.addEventListener(ProgressEvent.PROGRESS, trackProgressHandler);
    newTrack.load(newUrlRequest, context);
    chan = newTrack.play(trackPos);
    chan.soundTransform = trans;
    chan.addEventListener(Event.SOUND_COMPLETE, playNext);
    track = newTrack;
// uses volume slider value to control volume
function volumeChange(e:SliderEvent):void
    currVol = e.target.value;
    trans.volume = currVol;
    chan.soundTransform = trans;
    mySO.data.MP3CurrVol = currVol;
    mySO.flush();