/**

 * SoundManager 2: Javascript Sound for the Web

 * ----------------------------------------------

 * http://schillmania.com/projects/soundmanager2/

 *

 * Copyright (c) 2007, Scott Schiller. All rights reserved.

 * Code licensed under the BSD License:

 * http://www.schillmania.com/projects/soundmanager2/license.txt

 *

 * Flash 9 / ActionScript 3 version

 */



package {



  import flash.display.Sprite;

  import flash.events.Event;

  import flash.events.IOErrorEvent;

  import flash.events.MouseEvent;

  import flash.events.SecurityErrorEvent;

  import flash.events.AsyncErrorEvent;

  import flash.events.NetStatusEvent;

  import flash.events.TimerEvent;

  import flash.external.ExternalInterface; // woo

  import flash.media.Sound;

  import flash.media.SoundChannel;

  import flash.media.SoundMixer;

  import flash.net.URLLoader;

  import flash.net.URLRequest;

  import flash.system.Security;

  import flash.system.System;

  import flash.text.TextField;

  import flash.text.TextFormat;

  import flash.text.TextFieldAutoSize;

  import flash.ui.ContextMenu;

  import flash.ui.ContextMenuItem;

  import flash.utils.setInterval;

  import flash.utils.clearInterval;

  import flash.utils.Dictionary;

  import flash.utils.Timer;



  public class SoundManager2_AS3 extends Sprite {



    public var version:String = "V2.97a.20120916";

    public var version_as:String = "(AS3/Flash 9)";



    /**

     *  Cross-domain security options

     *  HTML on foo.com loading .swf hosted on bar.com? Define your "HTML domain" here to allow JS+Flash communication to work.

     *  // allow_xdomain_scripting = true;

     *  // xdomain = "foo.com";

     *  For all domains (possible security risk?), use xdomain = "*"; which ends up as System.security.allowDomain("*");

     *  When loading from HTTPS, use System.security.allowInsecureDomain();

     *  See http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/system/Security.html#allowDomain()

     */

    public var allow_xdomain_scripting:Boolean = false;

    public var xdomain:String = "*";



    // externalInterface references (for Javascript callbacks)

    public var baseJSController:String = "soundManager";

    public var baseJSObject:String = baseJSController + ".sounds";



    // internal objects

    public var sounds:Array = []; // indexed string array

    public var soundObjects: Dictionary = new Dictionary(); // associative Sound() object Dictionary type

    public var timer: Timer = null;

    public var pollingEnabled: Boolean = false; // polling (timer) flag - disabled by default, enabled by JS->Flash call

    public var debugEnabled: Boolean = true; // Flash debug output enabled by default, disabled by JS call

    public var flashDebugEnabled: Boolean = false; // Flash internal debug output (write to visible SWF in browser)

    public var loaded: Boolean = false;

    public var currentObject: SoundManager2_SMSound_AS3 = null;

    public var paramList:Object = null;

    public var messages:Array = [];

    public var textField: TextField = null;

    public var textStyle: TextFormat = new TextFormat();

    public var didSandboxMessage: Boolean = false;

    public var caughtFatal: Boolean = false;



    public function SoundManager2_AS3() {



      if (allow_xdomain_scripting && xdomain) {

        Security.allowDomain(xdomain);

        version_as += ' - cross-domain enabled';

      }



      this.paramList = this.root.loaderInfo.parameters;



      // <d>

      if (this.paramList['debug'] == 1) {

        this.flashDebugEnabled = true;

      }



      if (this.flashDebugEnabled) {

        var canvas: Sprite = new Sprite();

        canvas.graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);

        addChild(canvas);

      }

      // </d>



      flashDebug('SM2 SWF ' + version + ' ' + version_as);



      // context menu item with version info



      var sm2Menu:ContextMenu = new ContextMenu();

      var sm2MenuItem:ContextMenuItem = new ContextMenuItem('SoundManager ' + version + ' ' + version_as);

      sm2MenuItem.enabled = false;

      sm2Menu.customItems.push(sm2MenuItem);

      contextMenu = sm2Menu;



      if (ExternalInterface.available) {

        flashDebug('ExternalInterface available');

        try {

          flashDebug('Adding ExternalInterface callbacks...');

          ExternalInterface.addCallback('_load', _load);

          ExternalInterface.addCallback('_unload', _unload);

          ExternalInterface.addCallback('_stop', _stop);

          ExternalInterface.addCallback('_start', _start);

          ExternalInterface.addCallback('_pause', _pause);

          ExternalInterface.addCallback('_setPosition', _setPosition);

          ExternalInterface.addCallback('_setPan', _setPan);

          ExternalInterface.addCallback('_setVolume', _setVolume);

          ExternalInterface.addCallback('_setPolling', _setPolling);

          ExternalInterface.addCallback('_externalInterfaceTest', _externalInterfaceTest);

          ExternalInterface.addCallback('_disableDebug', _disableDebug);

          ExternalInterface.addCallback('_getMemoryUse', _getMemoryUse);

          ExternalInterface.addCallback('_createSound', _createSound);

          ExternalInterface.addCallback('_destroySound', _destroySound);

          ExternalInterface.addCallback('_setAutoPlay', _setAutoPlay);

        } catch(e: Error) {

          flashDebug('Fatal: ExternalInterface error: ' + e.toString());

        }

      } else {

        flashDebug('Fatal: ExternalInterface (Flash &lt;-&gt; JS) not available');

      };



      // call after delay, to be safe (ensure callbacks are registered by the time JS is called below)

      var timer: Timer = new Timer(20, 0);

      timer.addEventListener(TimerEvent.TIMER, function() : void {

        timer.reset();

        _externalInterfaceTest(true);

        // timer.reset();

        // flashDebug('Init OK');

      });

      timer.start();

      // delayed, see above

      // _externalInterfaceTest(true);

    } // SoundManager2()



    public function flashDebug (txt:String) : void {

      // <d>

      messages.push(txt);

      if (this.flashDebugEnabled) {

        var didCreate: Boolean = false;

        textStyle.font = 'Arial';

        textStyle.size = 12;

        // 320x240 if no stage dimensions (happens in IE, apparently 0 before stage resize event fires.)

       var w:Number = this.stage.width?this.stage.width:320;

       var h:Number = this.stage.height?this.stage.height:240;

        if (textField == null) {

          didCreate = true;

          textField = new TextField();

          textField.autoSize = TextFieldAutoSize.LEFT;

          textField.x = 0;

          textField.y = 0;

          textField.multiline = true;

          textField.textColor = 0;

          textField.wordWrap = true;

        }

        textField.htmlText = messages.join('\n');

        textField.setTextFormat(textStyle);

        textField.width = w;

        textField.height = h;

        if (didCreate) {

          this.addChild(textField);

        }

      }

      // </d>

    }



    public function _setAutoPlay(sID:String, autoPlay:Boolean) : void {

      var s: SoundManager2_SMSound_AS3 = soundObjects[sID];

      if (s) {

        s.setAutoPlay(autoPlay);

      }

    }



    // methods

    // -----------------------------------



    public function writeDebug (s:String, bTimestamp: Boolean = false) : Boolean {

      if (!debugEnabled) {

        return false;

      }

      // <d>

      ExternalInterface.call(baseJSController + "['_writeDebug']", "(Flash): " + s, null, bTimestamp);

      // </d>

      return true;

    }



    public function _externalInterfaceTest(isFirstCall: Boolean) : Boolean {

      var sandboxType:String = flash.system.Security['sandboxType'];

      if (!didSandboxMessage && sandboxType != 'localTrusted' && sandboxType != 'remote') {

        didSandboxMessage = true;

        flashDebug('<br><b>Fatal: Security sandbox error: Got "' + sandboxType + '", expected "remote" or "localTrusted".<br>Additional security permissions need to be granted.<br>See <a href="http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager04.html">flash security settings panel</a> for non-HTTP, eg., file:// use.</b><br>http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager04.html<br><br>You may also be able to right-click this movie and choose from the menu: <br>"Global Settings" -> "Advanced" tab -> "Trusted Location Settings"<br>');

      }

      try {

        if (isFirstCall == true) {

          flashDebug('Testing Flash -&gt; JS...');

          var d: Date = new Date();

          ExternalInterface.call(baseJSController + "._externalInterfaceOK", d.getTime(), version);

          flashDebug('Flash -&gt; JS OK');

          flashDebug('Waiting for JS -&gt; Flash...');

        } else {

          writeDebug('SM2 SWF ' + version + ' ' + version_as);

          flashDebug('JS -&gt; Flash OK');

          ExternalInterface.call(baseJSController + "._setSandboxType", sandboxType);

          writeDebug('JS to/from Flash OK');

        }

      } catch(e: Error) {

        flashDebug('Fatal: Flash &lt;-&gt; JS error: ' + e.toString());

        writeDebug('_externalInterfaceTest: Error: ' + e.toString());

        if (!caughtFatal) {

          caughtFatal = true;

        }

        return false;

      }

      return true; // to verify that a call from JS to here, works. (eg. JS receives "true", thus OK.)

    }



    public function _disableDebug() : void {

      // prevent future debug calls from Flash going to client (maybe improve performance)

      writeDebug('_disableDebug()');

      debugEnabled = false;

    }



    public function checkLoadProgress(e: Event) : void {

      try {

        var oSound:Object = e.target;

        var bL: int = oSound.bytesLoaded;

        var bT: int = oSound.bytesTotal;

        var nD: int = oSound.length || oSound.duration || 0;

        var sMethod:String = baseJSObject + "['" + oSound.sID + "']._whileloading";

        ExternalInterface.call(sMethod, bL, bT, nD);

        if (bL && bT && bL != oSound.lastValues.bytes) {

          oSound.lastValues.bytes = bL;

          ExternalInterface.call(sMethod, bL, bT, nD);

        }

      } catch(e: Error) {

        writeDebug('checkLoadProgress(): ' + e.toString());

      }

    }



    public function checkSoundProgress(oSound:SoundManager2_SMSound_AS3, forceCheck:Boolean = false, forceEndCheck:Boolean = false) : void {

      var bL: int = 0;

      var bT: int = 0;

      var nD: int = 0;

      var nP: int = 0;

      var bufferLength: int = 0;

      var lP:Number = 0;

      var rP:Number = 0;

      var isBuffering:Object = null;

      var oSoundChannel: flash.media.SoundChannel = null;

      var sMethod:String = null;

      var newPeakData: Boolean = false;

      var newWaveformData: Boolean = false;

      var newEQData: Boolean = false;

      var areSoundsInaccessible: Boolean = SoundMixer.areSoundsInaccessible();

      var isPlaying: Boolean = true; // special case for NetStream when ending

      var hasNew:Boolean = false;

      var hasNewLoaded:Boolean = false;



      if (!oSound || !oSound.useEvents || oSound.failed || !oSound.connected) {

        // edge cases for ignoring: if sounds are destructed within event handlers while checkProgress() is running, may be null

        return;

      }



      sMethod = baseJSObject + "['" + oSound.sID + "']._whileloading";



      if (oSound.useNetstream) {



        // Don't do anything if there is no NetStream object yet

        if (!oSound.ns) {

          return;

        }



        // stream

        bufferLength = oSound.ns.bufferLength;

        bL = oSound.ns.bytesLoaded;

        bT = oSound.ns.bytesTotal;

        nD = int(oSound.duration || 0); // can sometimes be null with short MP3s? Wack.

        nP = oSound.ns.time * 1000;



        if (oSound.paused) {

          // special case: paused netStreams don't update if setPosition() is called while they are paused.

          // instead, return lastValues.position which should reflect setPosition() call.

          // writeDebug('paused case, setting nP of '+nP+' to -1');

          // writeDebug('lastValues: '+oSound.lastValues.position);

          nP = oSound.lastValues.position;

        }



        if (nP >= 0 && nP != oSound.lastValues.position) {

          oSound.lastValues.position = nP;

          hasNew = true;

        }

        if (nD > oSound.lastValues.duration) {

          oSound.lastValues.duration = nD;

          hasNew = true;

        }

        if (bL > oSound.lastValues.bytesLoaded) {

          oSound.lastValues.bytesLoaded = bL;

          hasNew = true;

        }

        if (bT > oSound.lastValues.bytes) {

          oSound.lastValues.bytes = bT;

          hasNew = true;

        }

        if (bufferLength != oSound.lastValues.bufferLength) {

          oSound.lastValues.bufferLength = bufferLength;

          hasNew = true;

        }



        // Don't set loaded for streams because bytesLoaded and bytesTotal are always 0

        // writeDebug('ns: time/duration, bytesloaded/total: '+nP+'/'+nD+', '+bL+'/'+bT);

        if (oSound.loaded != true && nD > 0 && bL == bT && bL != 0 && bT != 0) {

          // non-MP3 has loaded

          oSound.loaded = true;

          try {

            ExternalInterface.call(sMethod, bL, bT, nD, bufferLength);

            ExternalInterface.call(baseJSObject + "['" + oSound.sID + "']._onload", oSound.duration > 0 ? 1 : 0);

          } catch(e: Error) {

            writeDebug('_whileLoading/_onload error: ' + e.toString());

          }

        } else if (oSound.loaded != true && hasNew) {

          ExternalInterface.call(sMethod, bL, bT, nD, bufferLength);

        }



      } else {



        // MP3 sound

        oSoundChannel = oSound.soundChannel;

        bL = oSound.bytesLoaded;

        bT = oSound.bytesTotal;

        nD = int(oSound.length || 0); // can sometimes be null with short MP3s? Wack.

        isBuffering = oSound.isBuffering;



        if (oSoundChannel) {

          nP = (oSoundChannel.position || 0);

          if (oSound.lastValues.loops > 1 && nP > oSound.length) {

            // round down to nearest loop

            var playedLoops:Number = Math.floor(nP/oSound.length);

            nP = nP - (oSound.length*playedLoops);

          }

          if (oSound.usePeakData) {

            lP = int((oSoundChannel.leftPeak) * 1000) / 1000;

            rP = int((oSoundChannel.rightPeak) * 1000) / 1000;

          } else {

            lP = 0;

            rP = 0;

          }

          } else {

          // stopped, not loaded or feature not used

          nP = 0;

        }



        if (forceEndCheck) {

          // sound finish case: Ensure position is at end (sound duration), as flash 9 does not always correctly match the two.

          if (nP < nD) {

            writeDebug('correcting sound ' + oSound.sID + ' end position ('+nP+') to length: '+ nD);

            nP = nD;

          }

        }



        if (nP != oSound.lastValues.position && nP !== 0 && !oSound.didFinish) { // once "completed", sound is locked via didFinish so no more position-type events fire.

          oSound.lastValues.position = nP;

          hasNew = true;

        }



        if (nD > oSound.lastValues.duration) { // original sound duration * number of sound loops

          oSound.lastValues.duration = nD;

          hasNew = true;

        }



        if (bL > oSound.lastValues.bytesLoaded) {

          oSound.lastValues.bytesLoaded = bL;

          hasNew = true;

        }



        if (bT > oSound.lastValues.bytes) {

          oSound.lastValues.bytes = bT;

          hasNew = true;

          hasNewLoaded = true;

        }



        // loading progress

        if (hasNewLoaded) {

          oSound.lastValues.bytes = bL;

          ExternalInterface.call(sMethod, bL, bT, nD);

        }



      }



      // peak data

      if (oSoundChannel && oSound.usePeakData) {

        if (lP != oSound.lastValues.leftPeak) {

          oSound.lastValues.leftPeak = lP;

          newPeakData = true;

        }

        if (rP != oSound.lastValues.rightPeak) {

          oSound.lastValues.rightPeak = rP;

          newPeakData = true;

        }

      }



      var newDataError:Boolean = false;

      var dataError:String;



      // special case: Netstream may try to fire whileplaying() after finishing. check that stop hasn't fired.

      isPlaying = (oSound.didLoad && !oSound.paused && (!oSound.useNetstream || (oSound.useNetstream && oSound.lastNetStatus != "NetStream.Play.Stop"))); // don't update if stream has ended



      // raw waveform + EQ spectrum data

      if (isPlaying && (oSoundChannel || oSound.useNetstream)) {



        if (oSound.useWaveformData) {

          if (!areSoundsInaccessible && !oSound.handledDataError && !oSound.ignoreDataError) {

            try {

              oSound.getWaveformData();

            } catch(e: Error) {

              if (!oSound.handledDataError) {

                writeDebug('getWaveformData() (waveform data) '+e.toString());

              }

              // oSound.useWaveformData = false;

              newDataError = true;

              dataError = e.toString();

            }

          }

        }



        if (oSound.useEQData) {

          if (!areSoundsInaccessible && !oSound.handledDataError && !oSound.ignoreDataError) {

            try {

              oSound.getEQData();

            } catch(e: Error) {

              if (!oSound.handledDataError) {

                writeDebug('computeSpectrum() (EQ data) '+e.toString());

              }

              // oSound.useEQData = false;

              newDataError = true;

              dataError = e.toString();

            }

          }

        }



        if (oSound.waveformDataArray != oSound.lastValues.waveformDataArray) {

          oSound.lastValues.waveformDataArray = oSound.waveformDataArray;

          newWaveformData = true;

        }



        if (oSound.eqDataArray != oSound.lastValues.eqDataArray) {

          oSound.lastValues.eqDataArray = oSound.eqDataArray;

          newEQData = true;

        }



        if (newDataError && !oSound.handledDataError) {

          sMethod = baseJSObject + "['" + oSound.sID + "']._ondataerror";

          ExternalInterface.call(sMethod, 'data unavailable: ' + dataError);

          oSound.handledDataError = true;

        }



      }



      if (typeof nP != 'undefined' && (hasNew && (oSound.soundChannel || oSound.useNetstream || forceCheck || forceEndCheck))) { // && isPlaying - removed to allow updates while paused, eg. from setPosition() calls. Also be more liberal if we're using netStream.



        // oSound.lastValues.position = nP;

        sMethod = baseJSObject + "['" + oSound.sID + "']._whileplaying";

        var waveDataLeft:String = (newWaveformData ? oSound.waveformDataArray.slice(0, 256).join(',') : null);

        var waveDataRight:String = (newWaveformData ? oSound.waveformDataArray.slice(256).join(',') : null);

        var eqDataLeft:String = (newEQData ? oSound.eqDataArray.slice(0, 256).join(',') : null);

        var eqDataRight:String = (newEQData ? oSound.eqDataArray.slice(256).join(',') : null);

        ExternalInterface.call(sMethod, nP, (newPeakData ? {

          leftPeak: lP,

          rightPeak: rP

        } : null), waveDataLeft, waveDataRight, (newEQData ? {

          leftEQ: eqDataLeft,

          rightEQ: eqDataRight

        } : null));

      }



      // check isBuffering

      if (!oSound.useNetstream && oSound.isBuffering != oSound.lastValues.isBuffering) {

        // property has changed

        oSound.lastValues.isBuffering = oSound.isBuffering;

        sMethod = baseJSObject + "['" + oSound.sID + "']._onbufferchange";

        ExternalInterface.call(sMethod, oSound.isBuffering ? 1 : 0);

      }



    }



    public function checkProgress() : void {

      for (var i: int = 0, j: int = sounds.length; i < j; i++) {

        checkSoundProgress(soundObjects[sounds[i]]);

      }

    }



    public function onLoadError(oSound:Object) : void {

      // something went wrong. 404, bad format etc.

      ExternalInterface.call(baseJSObject + "['" + oSound.sID + "']._onload", 0);

    }



    public function onLoad(e: Event) : void {

      var oSound:Object = e.target;

      checkSoundProgress(soundObjects[oSound.sID]); // ensure progress stats are up-to-date

      if (!oSound.useNetstream) { // FLV must also have metadata

        oSound.loaded = true;

        // force duration update (doesn't seem to be always accurate)

        ExternalInterface.call(baseJSObject + "['" + oSound.sID + "']._whileloading", oSound.bytesLoaded, oSound.bytesTotal, oSound.length || oSound.duration);

        // TODO: Determine if loaded or failed - bSuccess?

        // ExternalInterface.call(baseJSObject+"['"+oSound.sID+"']._onload",bSuccess?1:0);

        ExternalInterface.call(baseJSObject + "['" + oSound.sID + "']._onload", 1);

      }

    }



    public function onID3(e: Event) : void {



      // --- NOTE: BUGGY (Flash 8 only? Haven't really checked 9 + 10.) ---

      // TODO: Investigate holes in ID3 parsing - for some reason, Album will be populated with Date if empty and date is provided. (?)

      // ID3V1 seem to parse OK, but "holes" / blanks in ID3V2 data seem to get messed up (eg. missing album gets filled with date.)

      // iTunes issues: onID3 was not called with a test MP3 encoded with iTunes 7.01, and what appeared to be valid ID3V2 data.

      // May be related to thumbnails for album art included in MP3 file by iTunes. See http://mabblog.com/blog/?p=33

      try {

        var oSound:Object = e.target;



        var id3Data:Array = [];

        var id3Props:Array = [];

        for (var prop:String in oSound.id3) {

          id3Props.push(prop);

          id3Data.push(oSound.id3[prop]);

          // writeDebug('id3['+prop+']: '+oSound.id3[prop]);

        }

        ExternalInterface.call(baseJSObject + "['" + oSound.sID + "']._onid3", id3Props, id3Data);

        // unhook own event handler, prevent second call (can fire twice as data is received - ID3V2 at beginning, ID3V1 at end.)

        // Therefore if ID3V2 data is received, ID3V1 is ignored.

        // soundObjects[oSound.sID].onID3 = null;

      } catch(e: Error) {

        writeDebug('onID3(): Unable to get ID3 info for ' + oSound.sID + '.');

      }

      oSound.removeEventListener(Event.ID3, onID3);

    }



    public function registerOnComplete(sID:String) : void {

      var oSound: SoundManager2_SMSound_AS3 = soundObjects[sID];

      if (oSound && oSound.soundChannel) {

        oSound.didFinish = false; // reset this flag

        oSound.soundChannel.addEventListener(Event.SOUND_COMPLETE, function() : void {

          if (oSound) {

            // force progress check, catching special end-of-sound case where position may not match duration.

            checkSoundProgress(oSound, true, true);

            try {

              oSound.ignoreDataError = true; // workaround: avoid data error handling for this manual step..

              // oSound.soundChannel.stop();

              oSound.didFinish = true; // "lock" sound, prevent extra whileplaying() position-type updates

              // call onfinish first (with end position)...

              ExternalInterface.call(baseJSObject + "['" + sID + "']._onfinish");

              // then reset sound so it can be played again.

              // oSound.start(0, 1); // go back to 0

            } catch(e: Error) {

              writeDebug('Could not set position on ' + sID + ': ' + e.toString());

            }

            oSound.ignoreDataError = false; // ..and reset

            oSound.handledDataError = false; // reset this flag

          } else {

            // safety net

            ExternalInterface.call(baseJSObject + "['" + sID + "']._onfinish");

          }

        });

      }

    }



    public function doSecurityError(oSound: SoundManager2_SMSound_AS3, e: SecurityErrorEvent) : void {

      writeDebug('securityError: ' + e.text);

      // when this happens, you don't have security rights on the server containing the FLV file

      // a crossdomain.xml file would fix the problem easily

    }



    public function _setPosition(sID:String, nSecOffset:Number, isPaused: Boolean, allowMultiShot: Boolean) : void {

      var s: SoundManager2_SMSound_AS3 = soundObjects[sID];

      if (!s) return void;

      // writeDebug('_setPosition()');



      // stop current channel, start new one.

      if (s.lastValues) {

        s.lastValues.position = nSecOffset; // s.soundChannel.position;

      }

      if (s.useNetstream) {

        // Minimize the buffer so playback starts ASAP

        s.ns.bufferTime = s.bufferTime;

        writeDebug('setPosition ('+ sID + '): setting buffer to '+s.ns.bufferTime+' secs');



        nSecOffset = nSecOffset > 0 ? nSecOffset / 1000 : 0;

        s.ns.seek(nSecOffset);

        checkSoundProgress(s); // force UI update

      } else {

        if (s.soundChannel) {

          s.soundChannel.stop();

        }

        writeDebug('setPosition ('+ sID + '): ' + nSecOffset); // +', '+(s.lastValues.loops?s.lastValues.loops:1));

        if (s.lastValues.loops > 1 && nSecOffset != 0) {

          writeDebug('Warning: Looping functionality being disabled due to Flash limitation.');

          s.lastValues.loops = 1;

        }

        try {

          s.start(nSecOffset, s.lastValues.loops || 1, allowMultiShot); // start playing at new position

        } catch(e: Error) {

          writeDebug('Warning: Could not set position on ' + sID + ': ' + e.toString());

        }

        checkSoundProgress(s); // force UI update

        try {

          registerOnComplete(sID);

        } catch(e: Error) {

          writeDebug('_setPosition(): Could not register onComplete');

        }

        if (isPaused && s.soundChannel) {

          // writeDebug('_setPosition: stopping (paused) sound');

          // writeDebug('last position: '+s.lastValues.position+' vs '+s.soundChannel.position);

          s.soundChannel.stop();

        }

      }

    }



    public function _load(sID:String, sURL:String, bStream: Boolean, bAutoPlay: Boolean, nLoops: Number, bAutoLoad: Boolean, bCheckPolicyFile: Boolean) : void {

      // writeDebug('_load()');

      if (typeof bAutoPlay == 'undefined') bAutoPlay = false;

      var s: SoundManager2_SMSound_AS3 = soundObjects[sID];

      if (!s) return void;

      var didRecreate: Boolean = false;

      if (s.didLoad == true) {

        // need to recreate sound

        didRecreate = true;

        writeDebug('recreating sound ' + sID + ' in order to load ' + sURL);

        var ns:Object = new Object();

        ns.sID = s.sID;

        ns.loops = nLoops||1;

        ns.usePeakData = s.usePeakData;

        ns.useWaveformData = s.useWaveformData;

        ns.useEQData = s.useEQData;

        ns.useNetstream = s.useNetstream;

        ns.bufferTime = s.bufferTime;

        ns.serverUrl = s.serverUrl;

        ns.duration = s.duration;

        ns.checkPolicyFile = s.checkPolicyFile;

        ns.useEvents = true;

        _destroySound(s.sID);

        _createSound(ns.sID, sURL, ns.usePeakData, ns.useWaveformData, ns.useEQData, ns.useNetstream, ns.bufferTime, ns.loops, ns.serverUrl, ns.duration, bAutoPlay, ns.useEvents, bAutoLoad, ns.checkPolicyFile);

        s = soundObjects[sID];

        // writeDebug('Sound object replaced');

      }

      checkSoundProgress(s);



      if (!s.didLoad) {

        try {

          s.addEventListener(Event.ID3, onID3);

          s.addEventListener(Event.COMPLETE, onLoad);

        } catch(e: Error) {

          writeDebug('_load(): could not assign ID3/complete event handlers');

        }

      }



      // don't try to load if same request already made

      s.sURL = sURL;



      try {

        if (!s.useNetstream) {

          s.addEventListener(IOErrorEvent.IO_ERROR, function(e: IOErrorEvent) : void {

            s.doIOError(e);

          });

        }

        s.loadSound(sURL);

      } catch(e: Error) {

        // oh well

        writeDebug('_load: Error loading ' + sURL + '. Flash error detail: ' + e.toString());

      }



    }



    public function _unload(sID:String) : void {

      var s: SoundManager2_SMSound_AS3 = (soundObjects[sID] || null);

      if (!s) return void;

      var sURL:String = s.sURL; // save existing sound URL for object recreation

      try {

        removeEventListener(Event.ID3, onID3);

        removeEventListener(Event.COMPLETE, onLoad);

      } catch(e: Error) {

        writeDebug('_unload() warn: Could not remove ID3/complete events');

      }

      s.paused = false;

      if (s.soundChannel) {

        s.soundChannel.stop();

      }

      try {

        if (s.didLoad && !s.loaded && !s.useNetstream) {

          s.close(); // close stream only if still loading?

        }

      } catch(e: Error) {

        // stream may already have closed if sound loaded, etc.

        writeDebug(sID + '._unload(): Note: Unable to close stream: ' + e.toString());

        // oh well

      }

      // destroy and recreate Flash sound object, try to reclaim memory

      // writeDebug('sound._unload(): recreating sound '+sID+' to free memory');

      if (s.useNetstream) {

        // writeDebug('_unload(): closing netStream stuff');

        try {

          s.removeNetstreamEvents();

          s.ns.close();

          s.nc.close();

          // s.nc = null;

          // s.ns = null;

        } catch(e: Error) {

          // oh well

          writeDebug('_unload(): caught exception during netConnection/netStream close');

        }

      }

      var ns:Object = new Object();

      ns.sID = s.sID;

      ns.loops = s.loops;

      ns.usePeakData = s.usePeakData;

      ns.useWaveformData = s.useWaveformData;

      ns.useEQData = s.useEQData;

      ns.useNetstream = s.useNetstream;

      ns.bufferTime = s.bufferTime;

      ns.serverUrl = s.serverUrl;

      ns.duration = s.duration;

      ns.autoPlay = s.autoPlay;

      ns.autoLoad = s.autoLoad;

      ns.checkPolicyFile = s.checkPolicyFile;

      _destroySound(s.sID);

      _createSound(ns.sID, sURL, ns.usePeakData, ns.useWaveformData, ns.useEQData, ns.useNetstream, ns.bufferTime, ns.loops, ns.serverUrl, ns.duration, ns.autoPlay, false, ns.autoLoad, ns.checkPolicyFile); // false: don't allow events just yet

      soundObjects[sID].connected = true; // fake it?

      writeDebug(s.sID + '.unload(): ok');

    }



    public function _createSound(sID:String, sURL:String, usePeakData: Boolean, useWaveformData: Boolean, useEQData: Boolean, useNetstream: Boolean, bufferTime:Number, loops:Number, serverUrl:String, duration:Number, autoPlay:Boolean, useEvents:Boolean, autoLoad:Boolean, checkPolicyFile:Boolean) : void {

      var s: SoundManager2_SMSound_AS3 = new SoundManager2_SMSound_AS3(this, sID, sURL, usePeakData, useWaveformData, useEQData, useNetstream, bufferTime, serverUrl, duration, autoPlay, useEvents, autoLoad, checkPolicyFile);

      if (!soundObjects[sID]) {

        sounds.push(sID);

      }

      soundObjects[sID] = s;

      this.currentObject = s;

      s.sID = sID;

      s.sURL = sURL;

      s.paused = false;

      s.loaded = false;

      s.checkPolicyFile = checkPolicyFile;

      s.lastValues = {

        bytes: 0,

        duration: 0,

        position: 0,

        loops: loops||1,

        leftPeak: 0,

        rightPeak: 0,

        bufferLength: 0

      };

    }



    public function _destroySound(sID:String) : void {

      // for the power of garbage collection! .. er, Greyskull!

      var s: SoundManager2_SMSound_AS3 = (soundObjects[sID] || null);

      if (!s) return void;

      // try to unload the sound

      for (var i: int = 0, j: int = sounds.length; i < j; i++) {

        if (sounds[i] == sID) {

          sounds.splice(i, 1);

          break;

        }

      }

      if (s.soundChannel) {

        s.soundChannel.stop();

      }

      // if is a movie, remove that as well.

      if (s.useNetstream) {

        // s.nc.client = null;

        try {

          s.removeNetstreamEvents();

          // s.nc.removeEventListener(NetStatusEvent.NET_STATUS, s.doNetStatus);

        } catch(e: Error) {

          writeDebug('_destroySound(): Events already removed from netStream/netConnection?');

        }

        if (s.didLoad) {

          // TODO: figure out if stream is still open first, can't close an already-closed stream.

          try {

            s.ns.close();

            s.nc.close();

          } catch(e: Error) {

            // oh well

            writeDebug('_destroySound(): caught exception: '+e.toString());

          }

        }

      } else if (s.didLoad) {

        // non-netstream case

        try {

          s.close(); // close stream only if still loading?

        } catch(e: Error) {

          // oh well

        }

      }

      s = null;

      soundObjects[sID] = null;

      delete soundObjects[sID];

    }



    public function _stop(sID:String, bStopAll: Boolean) : void {

      // stop this particular instance (or "all", based on parameter)

      if (bStopAll) {

        SoundMixer.stopAll();

      } else {

        var s: SoundManager2_SMSound_AS3 = soundObjects[sID];

        if (!s) return void;

        if (s.useNetstream && s.ns) {

          s.ns.pause();

        } else if (s.soundChannel) {

          s.soundChannel.stop();

        }

        s.paused = false;

      }

    }



    public function _start(sID:String, nLoops: int, nMsecOffset: int, allowMultiShot: Boolean) : Boolean {

      var s: SoundManager2_SMSound_AS3 = soundObjects[sID];

      var result: Boolean;

      if (!s) return true;

      writeDebug('start (' + sID + '): ' + nMsecOffset + (nLoops > 1 ? ', loops: ' + nLoops : ''));

      s.lastValues.paused = false; // reset pause if applicable

      s.lastValues.loops = (nLoops || 1);

      if (!s.useNetstream) {

        s.lastValues.position = nMsecOffset;

      }

      s.handledDataError = false; // reset this flag

      try {

        result = s.start(nMsecOffset, nLoops, allowMultiShot);

      } catch(e: Error) {

        writeDebug('Could not start ' + sID + ': ' + e.toString());

      }

      try {

        registerOnComplete(sID);

      } catch(e: Error) {

        writeDebug('_start(): registerOnComplete failed');

      }

      return result;

    }



    public function _pause(sID:String, allowMultiShot: Boolean) : void {

      // writeDebug('_pause(): ' + sID);

      var s: SoundManager2_SMSound_AS3 = soundObjects[sID];

      if (!s) return void;

      // writeDebug('s.paused: '+s.paused);

      if (!s.paused) {

        // reference current position, stop sound

        s.paused = true;

        // writeDebug('_pause(): position: '+s.lastValues.position);

        if (s.useNetstream) {

          if (s.ns) {

            s.lastValues.position = s.ns.time*1000;

            s.ns.pause();

          } else if (s.autoPlay) {

            s.setAutoPlay(false);

          }

        } else {

          if (s.soundChannel) {

            s.lastValues.position = s.soundChannel.position;

            s.soundChannel.stop();

          }

        }

      } else {

        // resume playing from last position

        // writeDebug('resuming - playing at '+s.lastValues.position+', '+s.lastValues.loops+' times');

        s.paused = false;

        if (s.useNetstream) {

          s.ns.resume();

        } else {

          s.start(s.lastValues.position, s.lastValues.loops, allowMultiShot);

        }

        try {

          registerOnComplete(sID);

        } catch(e: Error) {

          writeDebug('_pause(): registerOnComplete() failed');

        }

      }

    }



    public function _setPan(sID:String, nPan:Number) : void {

      if (soundObjects[sID]) {

        soundObjects[sID].setPan(nPan);

      }

    }



    public function _setVolume(sID:String, nVol:Number) : void {

      // writeDebug('_setVolume: '+nVol);

      if (soundObjects[sID]) {

        soundObjects[sID].setVolume(nVol);

      }

    }



    public function _setPolling(bPolling: Boolean = false, nTimerInterval: uint = 50) : void {

      pollingEnabled = bPolling;

      if (timer == null && pollingEnabled) {

        writeDebug('Enabling polling, ' + nTimerInterval + ' ms interval');

        timer = new Timer(nTimerInterval, 0);

        timer.addEventListener(TimerEvent.TIMER, function() : void {

          checkProgress();

        }); // direct reference eg. checkProgress doesn't work? .. odd.

        timer.start();

      } else if (timer && !pollingEnabled) {

        writeDebug('Disabling polling');

        // flash.utils.clearInterval(timer);

        timer.reset();

      }

    }



    public function _getMemoryUse() : String {

      return System.totalMemory.toString();

    }



    // -----------------------------------

    // end methods



  }



  // package



}