/**
* Media Player JavaScript API Wrapper
*
* @author eBridge Learning Solutions Inc.
* @version 1.7
* @modified 18-OCT-2009
*/
var IS_IE = navigator.userAgent.match(/Gecko\//)==null;
var oPlayer = null; // Windows Media Player ActiveX Object
var oPlaylist = null; // JS Playlist object
/**
* Creates a media player object
*
* @param {String} url location of media file
* @param {String} id unique HTML id
* @param {Integer} width width of media player object
* @param {Integer} height height of mdeia player object
* @constructor
*/
MediaPlayer = function(url, id, width, height)
{
// Initialize default parameters
this.id = (id?id:'MediaPlayer');
this.width = (width?width:460);
this.height = (height?height:410);
this.version = '10.0';
this.params = new Array();
this.player = null;
// Set default options
this.URL(url);
//this.AutoStart(true); // Start video when player loads
this.StretchToFit(true); // Stretch video to player window size
}
MediaPlayer.prototype=
{
/**
* Class Versions
*/
Version :
{
'10.0' : 'clsid:6BF52A52-394A-11D3-B153-00C04F79FAA6',
'9.0' : 'clsid:6BF52A52-394A-11D3-B153-00C04F79FAA6',
'7.0' : 'clsid:6BF52A52-394A-11D3-B153-00C04F79FAA6',
'6.4' : 'clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95',
'6.0' : 'clsid:05589FA1-C356-11CE-BF01-00AA0055595A'
},
/**
* Possible play states
*/
PlayStates :
{
0 : 'Undefined',
1 : 'Stopped',
2 : 'Paused',
3 : 'Playing',
4 : 'ScanForward',
5 : 'ScanReverse',
6 : 'Buffering',
7 : 'Waiting',
8 : 'MediaEnded',
9 : 'Transitioning',
10 : 'Ready',
11 : 'Reconnecting'
},
SetSize : function(width, height)
{
this.width = width;
this.height = height;
},
/**
* Start playing video file when player loads
* @param {Boolean} bStart true=start now, false=do not start immediately
*/
AutoStart : function(bStart)
{
this.addParam('autoStart', bStart);
},
/**
* Prevent the media item from rewinding at the end of the clip (version 6.4 and earlier only)
* @param {Object} bRewind
*/
AutoRewind : function(bRewind)
{
this.addParam('autoRewind', bRewind);
},
/**
* Set the user-interface mode for the player
* @param {Object} sMode
*/
SetUIMode : function(sMode)
{
this.addParam('uiMode', sMode);
},
/**
* Sets if an animation should show while the file loads
* @param {Object} bStart
*/
StartOnLoad : function(bStart)
{
this.addParam('AnimationAtStart', bStart);
},
/**
* Render the video in the webpage rather than using video overlay
* @param {Object} bActive
*/
RenderInPage : function(bActive)
{
this.addParam('WindowlessVideo', bActive);
},
/**
* Stretch the video to fit the player size
* @param {Boolean} bStreatch
*/
StretchToFit : function(bStreatch)
{
this.addParam('StretchToFit', bStreatch);
},
/**
* Show player controls
*/
ShowControls : function(bShow)
{
this.addParam('ShowControls', bShow);
},
/**
* Show media player status bar
*/
ShowStatusBar : function(bShow)
{
this.addParam('ShowStatusBar', bShow);
},
/**
* Set the location and filename of the clip to be played
* @param {String} url file location (local or remote)
*/
URL : function(url)
{
if(this.player == null)
this.addParam('URL', url);
else {
if(IS_IE)
{
if(this.version <= 6.4) this.player.filename=url;
else this.player.URL = url;
}
else
{
// Firefox fix (requires command to be executed twice)
this.player.src = url;
this.player.src = url;
}
}
},
/**
* Gets reference to the player object
* @return {Object} a reference to the media player DOM object
*/
getReference : function()
{
return this.player;
},
/**
* Get the time remaining on the curret media item (version 7.0+)
* @return {Float} time remainging in seconds (-1 if unsupported)
*/
getTimeRemaining : function()
{
if(this.version >= 7.0)
{
try
{
return (this.player.currentMedia.duration - this.player.controls.currentPosition);
}catch(no_current_media_error)
{
return 0;
}
}
return -1;
},
events :
{
bPlayNext : false,
playState : function(newState)
{
switch(oPlayer.PlayStates[newState])
{
case 'Playing':
//alert("Playing...");
break;
case 'Paused':
//alert("Paused!");
break;
case 'MediaEnded':
this.bPlayNext = oPlaylist.isSuccessive();
break;
case 'Stopped':
if(this.bPlayNext)
{
this.bPlayNext=false;
setTimeout(function(){oPlaylist.next();},100);
}
break;
case 'Ready':
break;
}
window.status += oPlayer.PlayStates[newState] + " ";
//alert('next');
},
openState : function(newState)
{
//alert(newState);
//if(newState == 12) oPlayer.player.controls.play();
},
positionChange : function(oldPosition, newPosition)
{
window.status="Old: "+oldPosition+" | New: "+newPosition;
}
},
/**
* Inserts the Media Player object into the webpage
* @param {String} id
*/
write : function(id)
{
var node = document.getElementById(id);
if(node) node.innerHTML = this.getHTML();
else document.write(this.getHTML());
this.player = document.getElementById(this.id);
this.player.attachEvent('playStateChange', this.events.playState);
this.player.attachEvent('openStateChange', this.events.openState);
this.player.attachEvent('positionChange', this.events.positionChange);
},
/**
* PRIVATE - add/update an object parameter to the media player object class
* @param {String} name name of the parameter
* @param {String,Boolean,Integer} value value of the corresponding parameter
*/
addParam : function(name, value)
{
this.params[name] = value;
},
/**
* Builds the relavant HTML tags for a valid DOM object
* @return {String} formatted html tags
*/
getHTML : function()
{
var ie_html = "";
var attributes = "";
ie_html += '';
var non_ie_html = '';
if(IS_IE) return ie_html;
return non_ie_html;
},
uiModes :
{
invisible : 'invisible',
full : 'full',
small : 'small',
none : 'none'
}
}