;(function() {

"use strict";

var objectTypes = {
'function': true,
'object': true
};

function checkGlobal(value) {
    return (value && value.Object === Object) ? value : null;
  }

/** Built-in method references without a dependency on `root`. */
var freeParseFloat = parseFloat,
  freeParseInt = parseInt;

/** Detect free variable `exports`. */
var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
? exports
: undefined;

/** Detect free variable `module`. */
var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
? module
: undefined;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = (freeModule && freeModule.exports === freeExports)
? freeExports
: undefined;

/** Detect free variable `global` from Node.js. */
var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);

/** Detect free variable `self`. */
var freeSelf = checkGlobal(objectTypes[typeof self] && self);

/** Detect free variable `window`. */
var freeWindow = checkGlobal(objectTypes[typeof window] && window);

/** Detect `this` as the global object. */
var thisGlobal = checkGlobal(objectTypes[typeof this] && this);

/**
* Used as a reference to the global object.
*
* The `this` value is used if it's the global object to avoid Greasemonkey's
* restricted `window` object, otherwise the `window` object is used.
*/
var root = freeGlobal ||
((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
  freeSelf || thisGlobal || Function('return this')();

if( !('gc' in window ) ) {
	window.gc = function(){}
}

if (!HTMLCanvasElement.prototype.toBlob) {
 Object.defineProperty(HTMLCanvasElement.prototype, 'toBlob', {
  value: function (callback, type, quality) {

    var binStr = atob( this.toDataURL(type, quality).split(',')[1] ),
        len = binStr.length,
        arr = new Uint8Array(len);

    for (var i=0; i<len; i++ ) {
     arr[i] = binStr.charCodeAt(i);
    }

    callback( new Blob( [arr], {type: type || 'image/png'} ) );
  }
 });
}

// @license http://opensource.org/licenses/MIT
// copyright Paul Irish 2015


// Date.now() is supported everywhere except IE8. For IE8 we use the Date.now polyfill
//   github.com/Financial-Times/polyfill-service/blob/master/polyfills/Date.now/polyfill.js
// as Safari 6 doesn't have support for NavigationTiming, we use a Date.now() timestamp for relative values

// if you want values similar to what you'd get with real perf.now, place this towards the head of the page
// but in reality, you're just getting the delta between now() calls, so it's not terribly important where it's placed


(function(){

  if ("performance" in window == false) {
      window.performance = {};
  }

  Date.now = (Date.now || function () {  // thanks IE8
	  return new Date().getTime();
  });

  if ("now" in window.performance == false){

    var nowOffset = Date.now();

    if (performance.timing && performance.timing.navigationStart){
      nowOffset = performance.timing.navigationStart
    }

    window.performance.now = function now(){
      return Date.now() - nowOffset;
    }
  }

})();


function pad( n ) {
	return String("0000000" + n).slice(-7);
}
// https://developer.mozilla.org/en-US/Add-ons/Code_snippets/Timers

var g_startTime = window.Date.now();

function guid() {
	function s4() {
		return Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
	}
	return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
}

function CCFrameEncoder( settings ) {

	var _handlers = {};

	this.settings = settings;

	this.on = function(event, handler) {

		_handlers[event] = handler;

	};

	this.emit = function(event) {

		var handler = _handlers[event];
		if (handler) {

			handler.apply(null, Array.prototype.slice.call(arguments, 1));

		}

	};

	this.filename = settings.name || guid();
	this.extension = '';
	this.mimeType = '';

}

CCFrameEncoder.prototype.start = function(){};
CCFrameEncoder.prototype.stop = function(){};
CCFrameEncoder.prototype.add = function(){};
CCFrameEncoder.prototype.save = function(){};
CCFrameEncoder.prototype.dispose = function(){};
CCFrameEncoder.prototype.safeToProceed = function(){ return true; };
CCFrameEncoder.prototype.step = function() { console.log( 'Step not set!' ) }

function CCTarEncoder( settings ) {

  CCFrameEncoder.call( this, settings );

  this.extension = '.tar'
  this.mimeType = 'application/x-tar'
  this.fileExtension = '';
  this.baseFilename = this.filename;

  this.tape = null
  this.count = 0;
  this.part = 1;
  this.frames = 0;

}

CCTarEncoder.prototype = Object.create( CCFrameEncoder.prototype );

CCTarEncoder.prototype.start = function(){

  this.dispose();

};

CCTarEncoder.prototype.add = function( blob ) {

  var fileReader = new FileReader();
  fileReader.onload = function() {
    this.tape.append( pad( this.count ) + this.fileExtension, new Uint8Array( fileReader.result ) );

    if( this.settings.autoSaveTime > 0 && ( this.frames / this.settings.framerate ) >= this.settings.autoSaveTime ) {
      this.save( function( blob ) {
        this.filename = this.baseFilename + '-part-' + pad( this.part );
        download( blob, this.filename + this.extension, this.mimeType );
        var count = this.count;
        this.dispose();
        this.count = count+1;
        this.part++;
        this.filename = this.baseFilename + '-part-' + pad( this.part );
        this.frames = 0;
        this.step();
      }.bind( this ) )
    } else {
      this.count++;
      this.frames++;
      this.step();
    }

  }.bind( this );
  fileReader.readAsArrayBuffer(blob);

}

CCTarEncoder.prototype.save = function( callback ) {

  callback( this.tape.save() );

}

CCTarEncoder.prototype.dispose = function() {

  this.tape = new Tar();
  this.count = 0;

}

function CCPNGEncoder( settings ) {

	CCTarEncoder.call( this, settings );

	this.type = 'image/png';
	this.fileExtension = '.png';

}

CCPNGEncoder.prototype = Object.create( CCTarEncoder.prototype );

CCPNGEncoder.prototype.add = function( canvas ) {

	canvas.toBlob( function( blob ) {
		CCTarEncoder.prototype.add.call( this, blob );
	}.bind( this ), this.type )

}

function CCJPEGEncoder( settings ) {

	CCTarEncoder.call( this, settings );

	this.type = 'image/jpeg';
	this.fileExtension = '.jpg';
	this.quality = ( settings.quality / 100 ) || .8;

}

CCJPEGEncoder.prototype = Object.create( CCTarEncoder.prototype );

CCJPEGEncoder.prototype.add = function( canvas ) {

	canvas.toBlob( function( blob ) {
		CCTarEncoder.prototype.add.call( this, blob );
	}.bind( this ), this.type, this.quality )

}

/*

	WebM Encoder

*/

function CCWebMEncoder( settings ) {

	var canvas = document.createElement( 'canvas' );
	if( canvas.toDataURL( 'image/webp' ).substr(5,10) !== 'image/webp' ){
		console.log( "WebP not supported - try another export format" )
	}

	CCFrameEncoder.call( this, settings );

	this.quality = ( settings.quality / 100 ) || .8;

	this.extension = '.webm'
	this.mimeType = 'video/webm'
	this.baseFilename = this.filename;
  this.framerate = settings.framerate;

	this.frames = 0;
	this.part = 1;

  this.videoWriter = new WebMWriter({
    quality: this.quality,
    fileWriter: null,
    fd: null,
    frameRate: this.framerate
  });

}

CCWebMEncoder.prototype = Object.create( CCFrameEncoder.prototype );

CCWebMEncoder.prototype.start = function( canvas ) {

	this.dispose();

}

CCWebMEncoder.prototype.add = function( canvas ) {

  this.videoWriter.addFrame(canvas);

	if( this.settings.autoSaveTime > 0 && ( this.frames / this.settings.framerate ) >= this.settings.autoSaveTime ) {
		this.save( function( blob ) {
			this.filename = this.baseFilename + '-part-' + pad( this.part );
			download( blob, this.filename + this.extension, this.mimeType );
			this.dispose();
			this.part++;
			this.filename = this.baseFilename + '-part-' + pad( this.part );
			this.step();
		}.bind( this ) )
	} else {
    this.frames++;
		this.step();
	}

}

CCWebMEncoder.prototype.save = function( callback ) {

  this.videoWriter.complete().then(callback);

}

CCWebMEncoder.prototype.dispose = function( canvas ) {

	this.frames = 0;
  this.videoWriter = new WebMWriter({
    quality: this.quality,
    fileWriter: null,
    fd: null,
    frameRate: this.framerate
  });

}

function CCFFMpegServerEncoder( settings ) {

	CCFrameEncoder.call( this, settings );

	settings.quality = ( settings.quality / 100 ) || .8;

	this.encoder = new FFMpegServer.Video( settings );
    this.encoder.on( 'process', function() {
        this.emit( 'process' )
    }.bind( this ) );
    this.encoder.on('finished', function( url, size ) {
        var cb = this.callback;
        if ( cb ) {
            this.callback = undefined;
            cb( url, size );
        }
    }.bind( this ) );
    this.encoder.on( 'progress', function( progress ) {
        if ( this.settings.onProgress ) {
            this.settings.onProgress( progress )
        }
    }.bind( this ) );
    this.encoder.on( 'error', function( data ) {
        alert(JSON.stringify(data, null, 2));
    }.bind( this ) );

}

CCFFMpegServerEncoder.prototype = Object.create( CCFrameEncoder.prototype );

CCFFMpegServerEncoder.prototype.start = function() {

	this.encoder.start( this.settings );

};

CCFFMpegServerEncoder.prototype.add = function( canvas ) {

	this.encoder.add( canvas );

}

CCFFMpegServerEncoder.prototype.save = function( callback ) {

    this.callback = callback;
    this.encoder.end();

}

CCFFMpegServerEncoder.prototype.safeToProceed = function() {
    return this.encoder.safeToProceed();
};

/*
	HTMLCanvasElement.captureStream()
*/

function CCStreamEncoder( settings ) {

	CCFrameEncoder.call( this, settings );

	this.framerate = this.settings.framerate;
	this.type = 'video/webm';
	this.extension = '.webm';
	this.stream = null;
	this.mediaRecorder = null;
	this.chunks = [];

}

CCStreamEncoder.prototype = Object.create( CCFrameEncoder.prototype );

CCStreamEncoder.prototype.add = function( canvas ) {

	if( !this.stream ) {
		this.stream = canvas.captureStream( this.framerate );
		this.mediaRecorder = new MediaRecorder( this.stream );
		this.mediaRecorder.start();

		this.mediaRecorder.ondataavailable = function(e) {
			this.chunks.push(e.data);
		}.bind( this );

	}
	this.step();

}

CCStreamEncoder.prototype.save = function( callback ) {

	this.mediaRecorder.onstop = function( e ) {
		var blob = new Blob( this.chunks, { 'type' : 'video/webm' });
		this.chunks = [];
		callback( blob );

	}.bind( this );

	this.mediaRecorder.stop();

}

/*function CCGIFEncoder( settings ) {

	CCFrameEncoder.call( this );

	settings.quality = settings.quality || 6;
	this.settings = settings;

	this.encoder = new GIFEncoder();
	this.encoder.setRepeat( 1 );
  	this.encoder.setDelay( settings.step );
  	this.encoder.setQuality( 6 );
  	this.encoder.setTransparent( null );
  	this.encoder.setSize( 150, 150 );

  	this.canvas = document.createElement( 'canvas' );
  	this.ctx = this.canvas.getContext( '2d' );

}

CCGIFEncoder.prototype = Object.create( CCFrameEncoder );

CCGIFEncoder.prototype.start = function() {

	this.encoder.start();

}

CCGIFEncoder.prototype.add = function( canvas ) {

	this.canvas.width = canvas.width;
	this.canvas.height = canvas.height;
	this.ctx.drawImage( canvas, 0, 0 );
	this.encoder.addFrame( this.ctx );

	this.encoder.setSize( canvas.width, canvas.height );
	var readBuffer = new Uint8Array(canvas.width * canvas.height * 4);
	var context = canvas.getContext( 'webgl' );
	context.readPixels(0, 0, canvas.width, canvas.height, context.RGBA, context.UNSIGNED_BYTE, readBuffer);
	this.encoder.addFrame( readBuffer, true );

}

CCGIFEncoder.prototype.stop = function() {

	this.encoder.finish();

}

CCGIFEncoder.prototype.save = function( callback ) {

	var binary_gif = this.encoder.stream().getData();

	var data_url = 'data:image/gif;base64,'+encode64(binary_gif);
	window.location = data_url;
	return;

	var blob = new Blob( [ binary_gif ], { type: "octet/stream" } );
	var url = window.URL.createObjectURL( blob );
	callback( url );

}*/

function CCGIFEncoder( settings ) {

	CCFrameEncoder.call( this, settings );

	settings.quality = 31 - ( ( settings.quality * 30 / 100 ) || 10 );
	settings.workers = settings.workers || 4;

	this.extension = '.gif'
	this.mimeType = 'image/gif'

  	this.canvas = document.createElement( 'canvas' );
  	this.ctx = this.canvas.getContext( '2d' );
  	this.sizeSet = false;

  	this.encoder = new GIF({
		workers: settings.workers,
		quality: settings.quality,
		workerScript: settings.workersPath + 'gif.worker.js'
	} );

    this.encoder.on( 'progress', function( progress ) {
        if ( this.settings.onProgress ) {
            this.settings.onProgress( progress )
        }
    }.bind( this ) );

    this.encoder.on('finished', function( blob ) {
        var cb = this.callback;
        if ( cb ) {
            this.callback = undefined;
            cb( blob );
        }
    }.bind( this ) );

}

CCGIFEncoder.prototype = Object.create( CCFrameEncoder.prototype );

CCGIFEncoder.prototype.add = function( canvas ) {

	if( !this.sizeSet ) {
		this.encoder.setOption( 'width',canvas.width );
		this.encoder.setOption( 'height',canvas.height );
		this.sizeSet = true;
	}

	this.canvas.width = canvas.width;
	this.canvas.height = canvas.height;
	this.ctx.drawImage( canvas, 0, 0 );

	this.encoder.addFrame( this.ctx, { copy: true, delay: this.settings.step } );
	this.step();

	/*this.encoder.setSize( canvas.width, canvas.height );
	var readBuffer = new Uint8Array(canvas.width * canvas.height * 4);
	var context = canvas.getContext( 'webgl' );
	context.readPixels(0, 0, canvas.width, canvas.height, context.RGBA, context.UNSIGNED_BYTE, readBuffer);
	this.encoder.addFrame( readBuffer, true );*/

}

CCGIFEncoder.prototype.save = function( callback ) {

    this.callback = callback;

	this.encoder.render();

}

function CCapture( settings ) {

	var _settings = settings || {},
		_date = new Date(),
		_verbose,
		_display,
		_time,
		_startTime,
		_performanceTime,
		_performanceStartTime,
		_step,
        _encoder,
		_timeouts = [],
		_intervals = [],
		_frameCount = 0,
		_intermediateFrameCount = 0,
		_lastFrame = null,
		_requestAnimationFrameCallbacks = [],
		_capturing = false,
        _handlers = {};

	_settings.framerate = _settings.framerate || 60;
	_settings.motionBlurFrames = 2 * ( _settings.motionBlurFrames || 1 );
	_verbose = _settings.verbose || false;
	_display = _settings.display || false;
	_settings.step = 1000.0 / _settings.framerate ;
	_settings.timeLimit = _settings.timeLimit || 0;
	_settings.frameLimit = _settings.frameLimit || 0;
	_settings.startTime = _settings.startTime || 0;

	var _timeDisplay = document.createElement( 'div' );
	_timeDisplay.style.position = 'absolute';
	_timeDisplay.style.left = _timeDisplay.style.top = 0
	_timeDisplay.style.backgroundColor = 'black';
	_timeDisplay.style.fontFamily = 'monospace'
	_timeDisplay.style.fontSize = '11px'
	_timeDisplay.style.padding = '5px'
	_timeDisplay.style.color = 'red';
	_timeDisplay.style.zIndex = 100000
	if( _settings.display ) document.body.appendChild( _timeDisplay );

	var canvasMotionBlur = document.createElement( 'canvas' );
	var ctxMotionBlur = canvasMotionBlur.getContext( '2d' );
	var bufferMotionBlur;
	var imageData;

	_log( 'Step is set to ' + _settings.step + 'ms' );

    var _encoders = {
		gif: CCGIFEncoder,
		webm: CCWebMEncoder,
		ffmpegserver: CCFFMpegServerEncoder,
		png: CCPNGEncoder,
		jpg: CCJPEGEncoder,
		'webm-mediarecorder': CCStreamEncoder
    };

    var ctor = _encoders[ _settings.format ];
    if ( !ctor ) {
		throw "Error: Incorrect or missing format: Valid formats are " + Object.keys(_encoders).join(", ");
    }
    _encoder = new ctor( _settings );
    _encoder.step = _step

	_encoder.on('process', _process);
    _encoder.on('progress', _progress);

    if ("performance" in window == false) {
    	window.performance = {};
    }

	Date.now = (Date.now || function () {  // thanks IE8
		return new Date().getTime();
	});

	if ("now" in window.performance == false){

		var nowOffset = Date.now();

		if (performance.timing && performance.timing.navigationStart){
			nowOffset = performance.timing.navigationStart
		}

		window.performance.now = function now(){
			return Date.now() - nowOffset;
		}
	}

	var _oldSetTimeout = window.setTimeout,
		_oldSetInterval = window.setInterval,
	    	_oldClearInterval = window.clearInterval,
		_oldClearTimeout = window.clearTimeout,
		_oldRequestAnimationFrame = window.requestAnimationFrame,
		_oldNow = window.Date.now,
		_oldPerformanceNow = window.performance.now,
		_oldGetTime = window.Date.prototype.getTime;
	// Date.prototype._oldGetTime = Date.prototype.getTime;

	var media = [];

	function _init() {

		_log( 'Capturer start' );

		_startTime = window.Date.now();
		_time = _startTime + _settings.startTime;
		_performanceStartTime = window.performance.now();
		_performanceTime = _performanceStartTime + _settings.startTime;

		window.Date.prototype.getTime = function(){
			return _time;
		};
		window.Date.now = function() {
			return _time;
		};

		window.setTimeout = function( callback, time ) {
			var t = {
				callback: callback,
				time: time,
				triggerTime: _time + time
			};
			_timeouts.push( t );
			_log( 'Timeout set to ' + t.time );
            return t;
		};
		window.clearTimeout = function( id ) {
			for( var j = 0; j < _timeouts.length; j++ ) {
				if( _timeouts[ j ] == id ) {
					_timeouts.splice( j, 1 );
					_log( 'Timeout cleared' );
					continue;
				}
			}
		};
		window.setInterval = function( callback, time ) {
			var t = {
				callback: callback,
				time: time,
				triggerTime: _time + time
			};
			_intervals.push( t );
			_log( 'Interval set to ' + t.time );
			return t;
		};
		window.clearInterval = function( id ) {
			_log( 'clear Interval' );
			return null;
		};
		window.requestAnimationFrame = function( callback ) {
			_requestAnimationFrameCallbacks.push( callback );
		};
		window.performance.now = function(){
			return _performanceTime;
		};

		function hookCurrentTime() { 
			if( !this._hooked ) {
				this._hooked = true;
				this._hookedTime = this.currentTime || 0;
				this.pause();
				media.push( this );
			}
			return this._hookedTime + _settings.startTime;
		};

		try {
			Object.defineProperty( HTMLVideoElement.prototype, 'currentTime', { get: hookCurrentTime } )
			Object.defineProperty( HTMLAudioElement.prototype, 'currentTime', { get: hookCurrentTime } )
		} catch (err) {
			_log(err);
		}

	}

	function _start() {
		_init();
		_encoder.start();
		_capturing = true;
	}

	function _stop() {
		_capturing = false;
		_encoder.stop();
		_destroy();
	}

	function _call( fn, p ) {
		_oldSetTimeout( fn, 0, p );
	}

	function _step() {
		//_oldRequestAnimationFrame( _process );
		_call( _process );
	}

	function _destroy() {
		_log( 'Capturer stop' );
		window.setTimeout = _oldSetTimeout;
		window.setInterval = _oldSetInterval;
		window.clearInterval = _oldClearInterval;
		window.clearTimeout = _oldClearTimeout;
		window.requestAnimationFrame = _oldRequestAnimationFrame;
		window.Date.prototype.getTime = _oldGetTime;
		window.Date.now = _oldNow;
		window.performance.now = _oldPerformanceNow;
	}

	function _updateTime() {
		var seconds = _frameCount / _settings.framerate;
		if( ( _settings.frameLimit && _frameCount >= _settings.frameLimit ) || ( _settings.timeLimit && seconds >= _settings.timeLimit ) ) {
			_stop();
			_save();
		}
		var d = new Date( null );
		d.setSeconds( seconds );
		if( _settings.motionBlurFrames > 2 ) {
			_timeDisplay.textContent = 'CCapture ' + _settings.format + ' | ' + _frameCount + ' frames (' + _intermediateFrameCount + ' inter) | ' +  d.toISOString().substr( 11, 8 );
		} else {
			_timeDisplay.textContent = 'CCapture ' + _settings.format + ' | ' + _frameCount + ' frames | ' +  d.toISOString().substr( 11, 8 );
		}
	}

	function _checkFrame( canvas ) {

		if( canvasMotionBlur.width !== canvas.width || canvasMotionBlur.height !== canvas.height ) {
			canvasMotionBlur.width = canvas.width;
			canvasMotionBlur.height = canvas.height;
			bufferMotionBlur = new Uint16Array( canvasMotionBlur.height * canvasMotionBlur.width * 4 );
			ctxMotionBlur.fillStyle = '#0'
			ctxMotionBlur.fillRect( 0, 0, canvasMotionBlur.width, canvasMotionBlur.height );
		}

	}

	function _blendFrame( canvas ) {

		//_log( 'Intermediate Frame: ' + _intermediateFrameCount );

		ctxMotionBlur.drawImage( canvas, 0, 0 );
		imageData = ctxMotionBlur.getImageData( 0, 0, canvasMotionBlur.width, canvasMotionBlur.height );
		for( var j = 0; j < bufferMotionBlur.length; j+= 4 ) {
			bufferMotionBlur[ j ] += imageData.data[ j ];
			bufferMotionBlur[ j + 1 ] += imageData.data[ j + 1 ];
			bufferMotionBlur[ j + 2 ] += imageData.data[ j + 2 ];
		}
		_intermediateFrameCount++;

	}

	function _saveFrame(){

		var data = imageData.data;
		for( var j = 0; j < bufferMotionBlur.length; j+= 4 ) {
			data[ j ] = bufferMotionBlur[ j ] * 2 / _settings.motionBlurFrames;
			data[ j + 1 ] = bufferMotionBlur[ j + 1 ] * 2 / _settings.motionBlurFrames;
			data[ j + 2 ] = bufferMotionBlur[ j + 2 ] * 2 / _settings.motionBlurFrames;
		}
		ctxMotionBlur.putImageData( imageData, 0, 0 );
		_encoder.add( canvasMotionBlur );
		_frameCount++;
		_intermediateFrameCount = 0;
		_log( 'Full MB Frame! ' + _frameCount + ' ' +  _time );
		for( var j = 0; j < bufferMotionBlur.length; j+= 4 ) {
			bufferMotionBlur[ j ] = 0;
			bufferMotionBlur[ j + 1 ] = 0;
			bufferMotionBlur[ j + 2 ] = 0;
		}
		gc();

	}

	function _capture( canvas ) {

		if( _capturing ) {

			if( _settings.motionBlurFrames > 2 ) {

				_checkFrame( canvas );
				_blendFrame( canvas );

				if( _intermediateFrameCount >= .5 * _settings.motionBlurFrames ) {
					_saveFrame();
				} else {
					_step();
				}

			} else {
				_encoder.add( canvas );
				_frameCount++;
				_log( 'Full Frame! ' + _frameCount );
			}

		}

	}

	function _process() {

		var step = 1000 / _settings.framerate;
		var dt = ( _frameCount + _intermediateFrameCount / _settings.motionBlurFrames ) * step;

		_time = _startTime + dt;
		_performanceTime = _performanceStartTime + dt;

		media.forEach( function( v ) {
			v._hookedTime = dt / 1000;
		} );

		_updateTime();
		_log( 'Frame: ' + _frameCount + ' ' + _intermediateFrameCount );

		for( var j = 0; j < _timeouts.length; j++ ) {
			if( _time >= _timeouts[ j ].triggerTime ) {
				_call( _timeouts[ j ].callback )
				//console.log( 'timeout!' );
				_timeouts.splice( j, 1 );
				continue;
			}
		}

		for( var j = 0; j < _intervals.length; j++ ) {
			if( _time >= _intervals[ j ].triggerTime ) {
				_call( _intervals[ j ].callback );
				_intervals[ j ].triggerTime += _intervals[ j ].time;
				//console.log( 'interval!' );
				continue;
			}
		}

		_requestAnimationFrameCallbacks.forEach( function( cb ) {
     		_call( cb, _time - g_startTime );
        } );
        _requestAnimationFrameCallbacks = [];

	}

	function _save( callback ) {

		if( !callback ) {
			callback = function( blob ) {
				download( blob, _encoder.filename + _encoder.extension, _encoder.mimeType );
				return false;
			}
		}
		_encoder.save( callback );

	}

	function _log( message ) {
		if( _verbose ) console.log( message );
	}

    function _on( event, handler ) {

        _handlers[event] = handler;

    }

    function _emit( event ) {

        var handler = _handlers[event];
        if ( handler ) {

            handler.apply( null, Array.prototype.slice.call( arguments, 1 ) );

        }

    }

    function _progress( progress ) {

        _emit( 'progress', progress );

    }

	return {
		start: _start,
		capture: _capture,
		stop: _stop,
		save: _save,
        on: _on
	}
}

(freeWindow || freeSelf || {}).CCapture = CCapture;

  // Some AMD build optimizers like r.js check for condition patterns like the following:
  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
    // Define as an anonymous module so, through path mapping, it can be
    // referenced as the "underscore" module.
    define(function() {
    	return CCapture;
    });
}
  // Check for `exports` after `define` in case a build optimizer adds an `exports` object.
  else if (freeExports && freeModule) {
    // Export for Node.js.
    if (moduleExports) {
    	(freeModule.exports = CCapture).CCapture = CCapture;
    }
    // Export for CommonJS support.
    freeExports.CCapture = CCapture;
}
else {
    // Export to the global object.
    root.CCapture = CCapture;
}

}());