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package {
/* Webcam.js v1.0 */
/* Webcam library for capturing JPEG/PNG images and sending them to JavaScript */
/* Author: Joseph Huckaby <jhuckaby@effectgames.com> */
/* Based on JPEGCam: http://code.google.com/p/jpegcam/ */
/* Copyright (c) 2012 Joseph Huckaby */
/* Licensed under the MIT License */
import flash.display.LoaderInfo;
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.events.*;
import flash.utils.*;
import flash.media.Camera;
import flash.media.Video;
import flash.external.ExternalInterface;
import flash.net.*;
import flash.system.Security;
import flash.system.SecurityPanel;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.geom.Matrix;
import mx.utils.Base64Encoder;
import com.adobe.images.BitString;
import com.adobe.images.PNGEncoder;
import com.adobe.images.JPGEncoder;
public class Webcam extends Sprite {
private var video:Video;
private var video_width:int;
private var video_height:int;
private var dest_width:int;
private var dest_height:int;
private var camera:Camera;
private var bmpdata:BitmapData;
private var jpeg_quality:int;
private var image_format:String;
public function Webcam() {
// class constructor
flash.system.Security.allowDomain("*");
var flashvars:Object = LoaderInfo(this.root.loaderInfo).parameters;
video_width = Math.floor( flashvars.width );
video_height = Math.floor( flashvars.height );
dest_width = Math.floor( flashvars.dest_width );
dest_height = Math.floor( flashvars.dest_height );
jpeg_quality = Math.floor( flashvars.jpeg_quality );
image_format = flashvars.image_format;
stage.scaleMode = StageScaleMode.NO_SCALE;
// stage.scaleMode = StageScaleMode.EXACT_FIT;
stage.align = StageAlign.TOP_LEFT;
stage.stageWidth = Math.max(video_width, dest_width);
stage.stageHeight = Math.max(video_height, dest_height);
if (flashvars.new_user) {
Security.showSettings( SecurityPanel.PRIVACY );
}
// Hack to auto-select iSight camera on Mac (JPEGCam Issue #5, submitted by manuel.gonzalez.noriega)
// From: http://www.squidder.com/2009/03/09/trick-auto-select-mac-isight-in-flash/
var cameraIdx:int = -1;
for (var idx = 0, len = Camera.names.length; idx < len; idx++) {
if (Camera.names[idx] == "USB Video Class Video") {
cameraIdx = idx;
idx = len;
}
}
if (cameraIdx > -1) camera = Camera.getCamera( String(cameraIdx) );
else camera = Camera.getCamera();
if (camera != null) {
camera.addEventListener(ActivityEvent.ACTIVITY, activityHandler);
video = new Video( Math.max(video_width, dest_width), Math.max(video_height, dest_height) );
video.attachCamera(camera);
addChild(video);
if ((video_width < dest_width) && (video_height < dest_height)) {
video.scaleX = video_width / dest_width;
video.scaleY = video_height / dest_height;
}
camera.setQuality(0, 100);
camera.setKeyFrameInterval(10);
camera.setMode( Math.max(video_width, dest_width), Math.max(video_height, dest_height), 30);
// only detect motion once, to determine when camera is "live"
camera.setMotionLevel( 1 );
ExternalInterface.addCallback('_snap', snap);
ExternalInterface.addCallback('_configure', configure);
ExternalInterface.call('Webcam.flashNotify', 'flashLoadComplete', true);
}
else {
trace("You need a camera.");
ExternalInterface.call('Webcam.flashNotify', "error", "No camera was detected.");
}
}
public function configure(panel:String = SecurityPanel.CAMERA) {
// show configure dialog inside flash movie
Security.showSettings(panel);
}
private function activityHandler(event:ActivityEvent):void {
trace("activityHandler: " + event);
ExternalInterface.call('Webcam.flashNotify', 'cameraLive', true);
// now disable motion detection (may help reduce CPU usage)
camera.setMotionLevel( 100 );
}
public function snap() {
// take snapshot from camera, and upload if URL was provided
trace("in snap(), drawing to bitmap");
// take snapshot, convert to jpeg, submit to server
bmpdata = new BitmapData( Math.max(video_width, dest_width), Math.max(video_height, dest_height) );
bmpdata.draw( video );
if ((video_width > dest_width) && (video_height > dest_height)) {
// resize image downward before submitting
var tmpdata = new BitmapData(dest_width, dest_height);
var matrix = new Matrix();
matrix.scale( dest_width / video_width, dest_height / video_height );
tmpdata.draw( bmpdata, matrix, null, null, null, true ); // smoothing
bmpdata = tmpdata;
} // need resize
trace("converting to " + image_format);
var bytes:ByteArray;
if (image_format == 'png') {
bytes = PNGEncoder.encode( bmpdata );
}
else {
var encoder:JPGEncoder;
encoder = new JPGEncoder( jpeg_quality );
bytes = encoder.encode( bmpdata );
}
trace("raw image length: " + bytes.length);
var be = new Base64Encoder();
be.encodeBytes( bytes );
var bstr = be.toString();
trace("b64 string length: " + bstr.length);
return bstr;
}
}
}
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