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Adrien MALINGREY
2020-10-20 00:58:15 +02:00
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com/yahoo/astra/fl/controls/mediaPlayerClasses/AudioClip.as Executable file
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/*
Copyright (c) 2009 Yahoo! Inc. All rights reserved.
The copyrights embodied in the content of this file are licensed under the BSD (revised) open source license
*/
package com.yahoo.astra.fl.controls.mediaPlayerClasses
{
import flash.events.*;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.media.SoundTransform;
import flash.media.SoundLoaderContext;
import com.yahoo.astra.fl.controls.mediaPlayerClasses.IMediaClip;
import flash.net.URLRequest;
import fl.core.UIComponent;
import com.yahoo.astra.fl.events.MediaEvent;
import flash.utils.Timer;
import flash.display.DisplayObjectContainer;
//--------------------------------------
// Events
//--------------------------------------
/**
* Dispatched when on an interval while the clip is playing.
*
* @eventType com.yahoo.astra.fl.events.MediaEvent.MEDIA_POSITION
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Event(name="mediaPosition", type="com.yahoo.astra.fl.events.MediaEvent")]
/**
* Dispatched when the clip is paused or played.
*
* @eventType com.yahoo.astra.fl.events.MediaEvent.MEDIA_PLAY_PAUSE
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Event(name="mediaPlayPause", type="com.yahoo.astra.fl.events.MediaEvent")]
/**
* Dispatched when the volume level is changed.
*
* @eventType com.yahoo.astra.fl.events.MediaEvent.VOLUME_CHANGE
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Event(name="volumeChange", type="com.yahoo.astra.fl.events.MediaEvent")]
/**
* Dispatched when the id3 event is received.
*
* @eventType com.yahoo.astra.fl.events.MediaEvent.INFO_CHANGE
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Event(name="infoChange", type="com.yahoo.astra.fl.events.MediaEvent")]
/**
* Dispatched when a clip has completely loaded.
*
* @eventType com.yahoo.astra.fl.events.MediaEvent.MEDIA_LOADED
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Event(name="mediaLoaded", type="com.yahoo.astra.fl.events.MediaEvent")]
/**
* Dispatched when a clip reaches its end point.
*
* @eventType com.yahoo.astra.fl.events.MediaEvent.MEDIA_ENDED
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Event(name="mediaEnded", type="com.yahoo.astra.fl.events.MediaEvent")]
//--------------------------------------
// Class description
//--------------------------------------
/**
* The AudioClip class extends the EventDispatcher class and wraps the
* Sound, SoundChannel, SoundLoaderContext and SoundTransform classes.
*
* @see flash.media.Sound
* @see flash.media.SoundChannel
* @see flash.media.SoundTransform
* @see flash.media.SoundLoaderContext
* @see flash.events.EventDispatcher
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public class AudioClip extends EventDispatcher implements IMediaClip
{
//--------------------------------------
// Constructor
//--------------------------------------
/**
* Constructor
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function AudioClip():void
{
super();
_soundTransform = new SoundTransform(_volume, _panning);
_positionTimer = new Timer(50);
_positionTimer.addEventListener(TimerEvent.TIMER, positionUpdateHandler);
}
//--------------------------------------
// Properties
//--------------------------------------
/**
* @private (protected)
*/
protected var _mediaAvailable:Boolean = false;
/**
* @private (protected)
*/
protected var _length:Number = 0;
/**
* @private (protected)
*/
protected var _artist:String;
/**
* @private (protected)
*/
protected var _title:String;
/**
* @private (protected)
* The Sound object
*/
protected var _clip:Sound;
/**
* @private (protected)
* The SoundChannel
*/
protected var _channel:SoundChannel;
/**
* @private (protected)
* Timer used to dispatch "mediaPosition" events.
*/
protected var _positionTimer:Timer;
/**
* @private (protected)
* place holder for position.
*/
protected var _position:Number;
/**
* @private (protected)
* indicates whether the state of the clip is paused
*/
protected var _playing:Boolean = true;
/**
* @private (protected)
* indicates whether the sound is muted
*/
protected var _mute:Boolean = false;
/**
* @private (protected)
*/
protected var _volume:Number = 1;
/**
* @private (protected)
*/
protected var _panning:Number = 0;
/**
* @private (protected)
*/
protected var _soundTransform:SoundTransform;
/**
* @private (protected)
*/
protected var _autoStart:Boolean = false;
/**
* Gets the url to be used for an AudioClip (read-only)
*/
public function get url():String
{
return _clip.url;
}
/**
* Gets or sets the position of the playhead
*/
public function get position():Number
{
return _channel.position;
}
/**
* @private (setter)
* sets the position for a clip (cues and rewinds)
* if the clip is paused, the _position property is set to the received value
* otherwise the clip is played from that position
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function set position(value:Number):void
{
if(_mediaAvailable)
{
_position = Math.min(value, _length);
_channel.removeEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);
_channel = _clip.play(_position);
_channel.addEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);
_channel.soundTransform = _soundTransform;
if(!_playing) pause();
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_POSITION, false, false, _playing?Number(_channel.position.toFixed(2)):_position, _length, _soundTransform.volume, _mute));
}
}
/**
* Length of the Audio (read-only)
*/
public function get length():Number
{
return _length;
}
/**
* Boolean indicating if the audio is playing. (read-only) us pause() and play() methods to change playing
*/
public function get playing():Boolean
{
return _playing;
}
/**
* Gets or sets the volume, ranging from 0 (silent) to 1 (full volume).
*/
public function get volume():Number
{
return _soundTransform.volume;
}
/**
* @private (setter)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function set volume(value:Number):void
{
//sets the volume property of the _soundTransform object
//sets the _soundTransform object to the _channel
//dispatches a VOLUME_CHANGE MediaEvent
_soundTransform.volume = _volume = Math.max(0, Math.min(value, 1));
_mute = false;
if(_mediaAvailable)
{
_channel.soundTransform = _soundTransform;
dispatchEvent(new MediaEvent(MediaEvent.VOLUME_CHANGE, false, false, Number(_channel.position.toFixed(2)), _length, Number(_channel.soundTransform.volume), _mute));
}
else
{
dispatchEvent(new MediaEvent(MediaEvent.VOLUME_CHANGE, false, false, _position, 0, _soundTransform.volume, _mute));
}
}
/**
* Gets or sets the mute property of the AudioClip
*/
public function get mute():Boolean
{
return _mute;
}
/**
* @private (setter)
* Sets the mute property of the audio
*/
public function set mute(value:Boolean):void
{
//sets the value of _mute
//sets the volume of the _soundTransform object to 0 if +_mute is true and to _volume if _mute is false
//sets the _soundTransform object to the _channel
//dispatches a VOLUME_CHANGE MediaEvent
_mute = value;
_soundTransform.volume = _mute?0:_volume;
if(_mediaAvailable)
{
_channel.soundTransform = _soundTransform;
dispatchEvent(new MediaEvent(MediaEvent.VOLUME_CHANGE, false, false, Number(_channel.position.toFixed(2)), _length, Number(_channel.soundTransform.volume), _mute));
}
else
{
dispatchEvent(new MediaEvent(MediaEvent.VOLUME_CHANGE, false, false, _position, 0, _soundTransform.volume, _mute));
}
}
/**
* Gets the artist for the audio clip (read-only). This information is available:
* <ul>
* <li>If the SWF is in the same domain as the sound file.</li>
* <li>If the <code>checkPolicyFile</code> property is true and there
* is a cross-domain policy file on the server from which the sound is
* loaded that permits the domain of the loading SWF file. </li>
* </ul>
*
*/
public function get artist():String
{
return _artist;
}
/**
* Gets the title of the clip (read-only). This information is available:
* <ul>
* <li>If the SWF is in the same domain as the sound file.</li>
* <li>If the <code>checkPolicyFile</code> property is true and there is a cross-domain policy file on the
* server from which the sound is loaded that permits the domain of the loading SWF file. </li>
* </ul>
*
*/
public function get title():String
{
return _title;
}
/**
* Gets or sets the autoStart property of an AudioClip
*/
public function get autoStart():Boolean
{
return _autoStart;
}
/**
* @private (setter)
*/
public function set autoStart(value:Boolean):void
{
_autoStart = value;
}
/**
* @private (protected)
*/
protected var _soundLoaderContext:SoundLoaderContext;
/**
* @private (protected)
*/
protected var _bufferTime:Number = 1000;
/**
* Gets or sets buffer time. (milliseconds)
*/
public function get bufferTime():Number
{
return _bufferTime;
}
/**
* @private (setter)
*/
public function set bufferTime(value:Number):void
{
_bufferTime = value;
}
/**
* @private (protected)
*/
protected var _checkForPolicyFile:Boolean = true;
/**
* Gets or sets checkForPolicyFile property of the SoundLoaderContext. Specifies whether Flash Player should check
* for the existence of a cross-domain policy file upon loading the object (true) or not.
*
* @see flash.media.SoundLoaderContext;
*
*/
public function get checkForPolicyFile():Boolean
{
return _checkForPolicyFile;
}
/**
* @private (setter)
*/
public function set checkForPolicyFile(value:Boolean):void
{
_checkForPolicyFile = value;
}
//--------------------------------------
// Public Methods
//--------------------------------------
/**
* Loads an audio clip
*
* @param urlValue string for the location of the clip
* @param autoStart Boolean indicating whether the clip starts playing when it loads
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function loadMedia(urlValue:String, autoStart:Boolean = true):void
{
_soundLoaderContext = new SoundLoaderContext(bufferTime, checkForPolicyFile);
_length = 0;
_playing = autoStart;
_mediaAvailable = true;
_position = 0;
var request:URLRequest = new URLRequest(urlValue);
if(_clip != null)
{
removeClipListeners(_clip);
_positionTimer.reset();
}
if(_channel != null)
{
if(_channel.hasEventListener(Event.SOUND_COMPLETE)) _channel.removeEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);
_channel.stop();
}
_clip = new Sound();
addClipListeners(_clip);
_clip.load(request, _soundLoaderContext);
_channel = _clip.play();
_channel.addEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);
_channel.soundTransform = _soundTransform;
_positionTimer.start();
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_POSITION, false, false, _position, _length, _channel.soundTransform.volume, _mute));
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_PLAY_PAUSE, false, false, _position, _length, _channel.soundTransform.volume, _mute));
dispatchEvent(new MediaEvent(MediaEvent.VOLUME_CHANGE, false, false, _position, _length, _channel.soundTransform.volume, _mute));
if(!autoStart)
{
pause();
_position = 0;
}
//dispatchEvent(new MediaEvent(MediaEvent.MEDIA_READY));
}
/**
* Pauses the audio
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function pause():void
{
//sets pause to true
//dispatches a MEDIA_PLAY_PAUSE event
//calls the stop function
if(_mediaAvailable)
{
_playing = false;
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_PLAY_PAUSE, false, false, Number(_channel.position.toFixed(2)), _length, Number(_channel.soundTransform.volume), _mute));
stop();
_positionTimer.stop();
}
}
/**
* Plays the audio
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function play():void
{
//sets _playing to true
//dispatches a MEDIA_PLAY_PAUSE event
//set the SoundChannel object to the play method of the Sound object using the _position value
if(_mediaAvailable)
{
_positionTimer.start();
_playing = true;
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_PLAY_PAUSE, false, false, Number(_channel.position.toFixed(2)), _length, Number(_channel.soundTransform.volume), _mute));
_channel.removeEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);
_channel = _clip.play(_position);
_channel.addEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);
_channel.soundTransform = _soundTransform;
}
}
/**
* Stops the audio
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function stop():void
{
//sets _position to the current position of the sound object
//calls the stop method on the SoundChannel object
//used by pause method, to stop the playback when audio is in a paused state
//used by the controller to stop the video while the MediaScrubber seeks
if(_mediaAvailable)
{
_position = Number(_channel.position.toFixed(2));
_channel.stop();
}
}
//--------------------------------------
// Protected Methods
//--------------------------------------
/**
* @private (protected)
* Dispatches a MediaEvent.MEDIA_POSITION event with the _positionTimer event
* @param event The TimerEvent
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function positionUpdateHandler(event:TimerEvent):void
{
//if paused, update with the _position value. if not, update with the actual position of the sound channel
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_POSITION, false, false, _playing?Number(_channel.position.toFixed(2)):_position, _length, Number(_channel.soundTransform.volume), _mute));
}
/**
* @private (protected)
* Adds event listeners to a sound object when set clip is called.
* @param soundDispatcher
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function addClipListeners(soundDispatcher:Sound):void
{
soundDispatcher.addEventListener(Event.COMPLETE, completeHandler);
soundDispatcher.addEventListener(Event.ID3, id3Handler);
soundDispatcher.addEventListener(ProgressEvent.PROGRESS, progressHandler);
soundDispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
}
/**
* @private (protected)
* Removes listeners from the sound object before a new clip is set
* @param soundDispatcher
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function removeClipListeners(soundDispatcher:Sound):void
{
soundDispatcher.removeEventListener(Event.COMPLETE, completeHandler);
soundDispatcher.removeEventListener(Event.ID3, id3Handler);
soundDispatcher.removeEventListener(ProgressEvent.PROGRESS, progressHandler);
soundDispatcher.removeEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
}
/**
* @private (protected)
* Resets a clip to the beginning and dispatches MediaEvent.MEDIA_POSITION and MediaEvent.MEDIA_ENDED events.
* @param event soundComplete event
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function soundCompleteHandler(event:Event):void
{
pause();
position = 0;
//does not always fire. may need to add a catch in the timer to force an end
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_POSITION, false, false, _playing?Number(_channel.position.toFixed(2)):_position, _length, _soundTransform.volume, _mute));
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_ENDED, false, false, _playing?Number(_channel.position.toFixed(2)):_position, _length, _soundTransform.volume, _mute));
}
/**
* @private (protected)
* Dispatches a MediaEvent.MEDIA_LOADED event when the media has loaded
* @param event Event.COMPLETE event
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function completeHandler(event:Event):void
{
_length = _clip.length;
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_LOADED));
}
/**
* @private (protected)
* Dispatches a MediaEvent.INFO_CHANGE event when the ID3 event is received from the Sound object
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function id3Handler(event:Event):void
{
try
{
_title = _clip.id3.songName as String;
_artist = _clip.id3.artist as String;
}
catch(e:SecurityError)
{
_artist = "Artist Unavailable";
_title = "Title Unavailable";
}
dispatchEvent(new MediaEvent(MediaEvent.INFO_CHANGE, false, false));
}
/**
* @private
* dispatches the ProgressEvent to registered listeners
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function progressHandler(event:ProgressEvent):void
{
_length = _clip.length * (event.bytesTotal/event.bytesLoaded);
dispatchEvent(event);
}
/**
* @private
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function ioErrorHandler(event:IOErrorEvent):void
{
//need to reset everything here.
_mediaAvailable = false;
_positionTimer.stop();
_length = 0;
_artist = "Artist Unavailable";
_title = "Title Unavailable";
dispatchEvent(new MediaEvent(MediaEvent.INFO_CHANGE, false, false));
}
public function kill():void
{
if(_mediaAvailable)
{
pause();
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_POSITION, false, false, _playing?Number(_channel.position.toFixed(2)):_position, _length, _soundTransform.volume, _mute));
dispatchEvent(new MediaEvent(MediaEvent.MEDIA_ENDED, false, false, _playing?Number(_channel.position.toFixed(2)):_position, _length, _soundTransform.volume, _mute));
}
}
}
}