topical media & game development
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#graphic-flex-image-effects-11-Flex-SoundController.ax

#graphic-flex-image-effects-11-Flex-SoundController.ax [swf] [flash] flex 


  package {
  
          import flash.display.Sprite;
          import flash.events.Event;
          import flash.events.EventDispatcher;
          import flash.events.IOErrorEvent;
          import flash.media.Sound;
          import flash.media.SoundChannel;
          import flash.media.SoundMixer;
          import flash.net.URLRequest;
          import flash.utils.ByteArray;
Class to hanldle simple loading and playing back of sounds. This class also surfaces the sound spectrum of the Flash player's current loaded sounds that can be used for visualizations. 

  
          public class @ax-graphic-flex-image-effects-11-Flex-SoundController extends EventDispatcher {
  
                  private var _timerSprite:Sprite;
                  private var _playing:Boolean;
                  private var _sound:Sound;
                  private var _soundChannel:SoundChannel;
Constructor. This sets up an ENTER_FRAME listener on a sprite to be used to help broadcast events when a sound is playing so that a visualization can update each frame. If a file is passed to this constructor, it will be loaded and played.
parameter: file The sound file to request. 

  
                  public function @ax-graphic-flex-image-effects-11-Flex-SoundController(file:String=null) {
                          _timerSprite = new Sprite();
                          _timerSprite.addEventListener(Event.ENTER_FRAME, onSpriteEnterFrame);
                          if (file) {
                                  load(file);
                          }
                  }
Handler for ENTER_FRAME. If the sound is currently playing, a CHANGE event is dispatched.
parameter: event Event dispatched by sprite. 

  
                  private function onSpriteEnterFrame(event:Event):void {
                          if (_playing) {
                                  dispatchEvent(new Event(Event.CHANGE));
                          }
                  }
Sets _playing flag to false to prevent further dispatch of CHANGE event. Also dispatches COMPLETE event to listening objects.
parameter: event Event dispatched by @ax-graphic-flex-image-effects-11-Flex-SoundController. 

  
                  private function onSoundComplete(event:Event):void {
                          _playing = false;
                          dispatchEvent(event);
                  }
Handler for an error when loading a sound file. Simply redispatches event.
parameter: event Event dispatched by @ax-graphic-flex-image-effects-11-Flex-SoundController. 

  
                  private function onLoadError(event:Event):void {
                          dispatchEvent(event);
                  }
Attempts to load a sound file.
parameter: file The sound file to load. 

  
                  public function load(file:String):void {
                          _playing = false;
                          _sound = new Sound();
                          _sound.addEventListener(IOErrorEvent.IO_ERROR, onLoadError);
                          try {
                                  _sound.load(new URLRequest(file));
                                  _soundChannel = _sound.play();
                                  _soundChannel.addEventListener(Event.SOUND_COMPLETE, onSoundComplete);
                                  _playing = true;
                          } catch (e:Error) {
                                  trace(e.getStackTrace());
                          }
                  }
Returns a byte array containing the sound spectrum data of the loaded sounds playing in the Flash player. This will include ANY loaded sounds playing, since SoundMixer.computeSpectrum() does not differentiate between channels.
parameter: fftMode Whether to return frequency spectrum data or raw sound wave data.
parameter: stretchFactor The sampling rate used for the spectrum data.
returns: A byte array populated with sound spectrum data. 

  
                  public function getSoundSpectrum(fftMode:Boolean=true, stretchFactor:int=0):ByteArray {
                          var spectrumData:ByteArray = new ByteArray();
                          SoundMixer.computeSpectrum(spectrumData, fftMode, stretchFactor);
                          return spectrumData;
                  }
  
          }
  
  }
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

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