Read Barcode From Live Camera - JavaScript
Barcode Reader sample in JavaScript demonstrating ‘Read Barcode From Live Camera’
index.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>
Web Barcode Reader
</title>
<link href="Style/index.css" rel="stylesheet" />
</head>
<body>
<div class="upload_camera">
<h1>Barcodes From Camera</h1>
<hr/>
<div id="userMedia" style="display:none; height: 575px; width: 1182px">
<table>
<tr align="left" valign="top">
<td valign="top" colspan="2">
<h5 style=" color:Green; ">(HTML5 based camera) This works in Chrome, Firefox, Safari and other modern browsers with HTML5 support. If HTML5 camera is not enabled then Flash based camera should appear instead. To enable web-cam access answer ALLOW when asked if you want to give access to webcam </h5>
<strong>IMPORTANT: html5 webcam access (Chrome, Firefox, Safari on desktop and iOS) requires SSL connection! Otherwise, web camera will not initialize at all as it requies SSL connection only. </strong>
</td>
</tr>
<tr align="left" valign="top">
<td valign="top">
<br />
<span style=" font-size:20px; ">PDF.co API Key: </span>
<br />
<input type="text" style="width:500px; padding: 5px;" id="txtPDFcoAPIKey" />
<br />
<br />
<span style=" font-size:20px; ">Barcode Types to Read: </span>
<br />
<textarea style="width:500px; height:100px;" size="8" id="txtAreaBarcodeTypes">QRCode,Code39,Code39Extended,Code39Mod43,PDF417</textarea>
<br />
<br />
<span style=" font-size:20px; ">Output barcode values read appears below: </span>
<br />
<!-- decoding results appears in this listbox -->
<textarea style="width:500px; height:100px;" size="8" id="OutListBoxHTML5"></textarea>
<br />
<input id="snap" style="color:black; font-weight:bold; font-size:large;" type="button" onclick="UploadToCloud();" value="START READING BARCODES..." />
<input id="pause" style="color:black;" type="button" onclick="stopCall();" value="STOP" /> <h4 id="report"></h4>
</td>
<td valign="top">
<span>Webcam preview shows below:</span>
<video id="video" width="640" height="480" autoplay playsinline muted></video>
<!-- canvas with the output -->
<canvas id="canvasU" width="640" height="480" style="display:none"></canvas>
</td>
</tr>
</table>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<script type="text/javascript" src="Scripts/webcam.js"></script>
<script type="text/javascript" src="Scripts/index.js"></script>
</body>
</html>
index.js
var canvas, context, timer;
var constraints = window.constraints = {
audio: false,
video: { facingMode: "environment" } // change to "user" for front camera (see https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints/facingMode )
};
// (HTML5 based camera only) this portion of code will be used when browser supports navigator.getUserMedia ********* */
window.addEventListener("DOMContentLoaded", function () {
canvas = document.getElementById("canvasU"),
context = canvas.getContext("2d"),
video = document.getElementById("video"),
videoObj = { "video": true },
errBack = function (error) {
console.log("Video capture error: ", error.code);
};
// check if we can use HTML5 based camera (through mediaDevices.getUserMedia() function)
if (navigator.mediaDevices.getUserMedia) { // Standard browser
// display HTML5 camera
document.getElementById("userMedia").style.display = '';
// adding click event to take photo from webcam
document.getElementById("snap").addEventListener("click", function () {
context.drawImage(video, 0, 0, 640, 480);
});
navigator.mediaDevices
.getUserMedia(constraints)
.then(handleSuccess)
.catch(handleError);
}
// check if we can use HTML5 based camera (through .getUserMedia() function in Webkit based browser)
else if (navigator.webkitGetUserMedia) { // WebKit-prefixed for Google Chrome
// display HTML5 camera
document.getElementById("userMedia").style.display = '';
// adding click event to take photo from webcam
document.getElementById("snap").addEventListener("click", function () {
context.drawImage(video, 0, 0, 640, 480);
});
navigator.webkitGetUserMedia(videoObj, function (stream) {
video.src = window.webkitURL.createObjectURL(stream);
video.play();
}, errBack);
}
// check if we can use HTML5 based camera (through .getUserMedia() function in Firefox based browser)
else if (navigator.mozGetUserMedia) { // moz-prefixed for Firefox
// display HTML5 camera
document.getElementById("userMedia").style.display = '';
// adding click event to take photo from webcam
document.getElementById("snap").addEventListener("click", function () {
context.drawImage(video, 0, 0, 640, 480);
});
navigator.mozGetUserMedia(videoObj, function (stream) {
video.mozSrcObject = stream;
video.play();
}, errBack);
}
}, false);
function handleSuccess(stream) {
var video = document.querySelector('video');
var videoTracks = stream.getVideoTracks();
console.log('Got stream with constraints:', constraints);
console.log(`Using video device: ${videoTracks[0].label}`);
window.stream = stream; // make variable available to browser console
video.srcObject = stream;
}
function handleError(error) {
if (error.name === 'ConstraintNotSatisfiedError') {
var v = constraints.video;
errorMsg(`The resolution ${v.width.exact}x${v.height.exact} px is not supported by your device.`);
} else if (error.name === 'PermissionDeniedError') {
errorMsg('Permissions have not been granted to use your camera and ' +
'microphone, you need to allow the page access to your devices in ' +
'order for the demo to work.');
}
errorMsg(`getUserMedia error: ${error.name}`, error);
}
function errorMsg(msg, error) {
var errorElement = document.querySelector('#errorMsg');
errorElement.innerHTML += `<p>${msg}</p>`;
if (typeof error !== 'undefined') {
console.error(error);
}
}
// (HTML5 based camera only)
// uploads the image to the server
function UploadToCloud() {
if($.trim($("#txtPDFcoAPIKey").val()) === ""){
alert("PDF.co API Key can not be empty!");
return;
}
if($.trim($("#txtAreaBarcodeTypes").val()) === ""){
alert("PDF.co Barcode Types can not be empty!");
return;
}
$('#report').html("scanning the current frame......");
context.drawImage(video, 0, 0, 640, 480);
var img = canvas.toDataURL('image/jpeg', 0.9);//.split(',')[1];
readBarcodeFromPDF(img);
timer = setTimeout(UploadToCloud, 3000); // will capture new image to detect barcode after 3000 mili second
}
// (flash based camera only) stop the capturing
function stopCall() {
$('#report').html("STOPPED Scanning.");
clearTimeout(timer);
}
function readBarcodeFromPDF(img) {
const PDFcoAPIKey = $("#txtPDFcoAPIKey").val();
const barcodeTypes = $("#txtAreaBarcodeTypes").val();
var form = new FormData();
form.append("file", img);
form.append("name", `Frame_${new Date().getTime()}.jpg`);
var settings_base64Upload = {
"url": "https://api.pdf.co/v1/file/upload/base64",
"method": "POST",
"timeout": 0,
"headers": {
"x-api-key": PDFcoAPIKey
},
"processData": false,
"mimeType": "multipart/form-data",
"contentType": false,
"data": form
};
// Upload Base64 to PDF.co Cloud
$.ajax(settings_base64Upload).done(function (resp_upload) {
var json_resp_upload = JSON.parse(resp_upload);
var oData_barcodeRead = {
"url": json_resp_upload.url,
"types": barcodeTypes,
"encrypt": false,
"async": false
};
//console.log(oData_barcodeRead);
var settings_barcode_read = {
"url": "https://api.pdf.co/v1/barcode/read/from/url",
"method": "POST",
"timeout": 0,
"headers": {
"x-api-key": PDFcoAPIKey,
"Content-Type": "application/json"
},
"data": JSON.stringify(oData_barcodeRead),
};
$.ajax(settings_barcode_read).done(function (response_barcode) {
if(response_barcode.barcodes && response_barcode.barcodes.length > 0){
for (let i = 0; i < response_barcode.barcodes.length; i++) {
const elmBarcode = response_barcode.barcodes[i];
let htmlSelect = document.getElementById('OutListBoxHTML5');
htmlSelect.value = elmBarcode.Value + "\r\n" + htmlSelect.value;
}
}
});
});
}
webcam.js
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/ / W e b c a m l i b r a r y f o r c a p t u r i n g J P E G / P N G i m a g e s i n J a v a S c r i p t
/ / A t t e m p t s g e t U s e r M e d i a , f a l l s b a c k t o F l a s h
/ / A u t h o r : J o s e p h H u c k a b y : h t t p : / / g i t h u b . c o m / j h u c k a b y
/ / B a s e d o n J P E G C a m : h t t p : / / c o d e . g o o g l e . c o m / p / j p e g c a m /
/ / C o p y r i g h t ( c ) 2 0 1 2 - 2 0 1 7 J o s e p h H u c k a b y
/ / L i c e n s e d u n d e r t h e M I T L i c e n s e
( f u n c t i o n ( w i n d o w ) {
v a r _ u s e r M e d i a ;
/ / d e c l a r e e r r o r t y p e s
/ / i n h e r i t a n c e p a t t e r n h e r e :
/ / h t t p s : / / s t a c k o v e r f l o w . c o m / q u e s t i o n s / 7 8 3 8 1 8 / h o w - d o - i - c r e a t e - a - c u s t o m - e r r o r - i n - j a v a s c r i p t
f u n c t i o n F l a s h E r r o r ( ) {
v a r t e m p = E r r o r . a p p l y ( t h i s , a r g u m e n t s ) ;
t e m p . n a m e = t h i s . n a m e = " F l a s h E r r o r " ;
t h i s . s t a c k = t e m p . s t a c k ;
t h i s . m e s s a g e = t e m p . m e s s a g e ;
}
f u n c t i o n W e b c a m E r r o r ( ) {
v a r t e m p = E r r o r . a p p l y ( t h i s , a r g u m e n t s ) ;
t e m p . n a m e = t h i s . n a m e = " W e b c a m E r r o r " ;
t h i s . s t a c k = t e m p . s t a c k ;
t h i s . m e s s a g e = t e m p . m e s s a g e ;
}
v a r I n t e r m e d i a t e I n h e r i t o r = f u n c t i o n ( ) { } ;
I n t e r m e d i a t e I n h e r i t o r . p r o t o t y p e = E r r o r . p r o t o t y p e ;
F l a s h E r r o r . p r o t o t y p e = n e w I n t e r m e d i a t e I n h e r i t o r ( ) ;
W e b c a m E r r o r . p r o t o t y p e = n e w I n t e r m e d i a t e I n h e r i t o r ( ) ;
v a r W e b c a m = {
v e r s i o n : ' 1 . 0 . 2 5 ' ,
/ / g l o b a l s
p r o t o c o l : l o c a t i o n . p r o t o c o l . m a t c h ( / h t t p s / i ) ? ' h t t p s ' : ' h t t p ' ,
l o a d e d : f a l s e , / / t r u e w h e n w e b c a m m o v i e f i n i s h e s l o a d i n g
l i v e : f a l s e , / / t r u e w h e n w e b c a m i s i n i t i a l i z e d a n d r e a d y t o s n a p
u s e r M e d i a : t r u e , / / t r u e w h e n g e t U s e r M e d i a i s s u p p o r t e d n a t i v e l y
i O S : / i P a d | i P h o n e | i P o d / . t e s t ( n a v i g a t o r . u s e r A g e n t ) & & ! w i n d o w . M S S t r e a m ,
p a r a m s : {
w i d t h : 0 ,
h e i g h t : 0 ,
d e s t _ w i d t h : 0 , / / s i z e o f c a p t u r e d i m a g e
d e s t _ h e i g h t : 0 , / / t h e s e d e f a u l t t o w i d t h / h e i g h t
i m a g e _ f o r m a t : ' j p e g ' , / / i m a g e f o r m a t ( m a y b e j p e g o r p n g )
j p e g _ q u a l i t y : 9 0 , / / j p e g i m a g e q u a l i t y f r o m 0 ( w o r s t ) t o 1 0 0 ( b e s t )
e n a b l e _ f l a s h : t r u e , / / e n a b l e f l a s h f a l l b a c k ,
f o r c e _ f l a s h : f a l s e , / / f o r c e f l a s h m o d e ,
f l i p _ h o r i z : f a l s e , / / f l i p i m a g e h o r i z ( m i r r o r m o d e )
f p s : 3 0 , / / c a m e r a f r a m e s p e r s e c o n d
u p l o a d _ n a m e : ' w e b c a m ' , / / n a m e o f f i l e i n u p l o a d p o s t d a t a
c o n s t r a i n t s : n u l l , / / c u s t o m u s e r m e d i a c o n s t r a i n t s ,
s w f U R L : ' ' , / / U R I t o w e b c a m . s w f m o v i e ( d e f a u l t s t o t h e j s l o c a t i o n )
f l a s h N o t D e t e c t e d T e x t : ' E R R O R : N o A d o b e F l a s h P l a y e r d e t e c t e d . W e b c a m . j s r e l i e s o n F l a s h f o r b r o w s e r s t h a t d o n o t s u p p o r t g e t U s e r M e d i a ( l i k e y o u r s ) . ' ,
n o I n t e r f a c e F o u n d T e x t : ' N o s u p p o r t e d w e b c a m i n t e r f a c e f o u n d . ' ,
u n f r e e z e _ s n a p : t r u e , / / W h e t h e r t o u n f r e e z e t h e c a m e r a a f t e r s n a p ( d e f a u l t s t o t r u e )
i o s P l a c e h o l d e r T e x t : ' C l i c k h e r e t o o p e n c a m e r a . ' ,
u s e r _ c a l l b a c k : n u l l , / / c a l l b a c k f u n c t i o n f o r s n a p s h o t ( u s e d i f n o u s e r _ c a l l b a c k p a r a m e t e r g i v e n t o s n a p f u n c t i o n )
u s e r _ c a n v a s : n u l l / / u s e r p r o v i d e d c a n v a s f o r s n a p s h o t ( u s e d i f n o u s e r _ c a n v a s p a r a m e t e r g i v e n t o s n a p f u n c t i o n )
} ,
e r r o r s : {
F l a s h E r r o r : F l a s h E r r o r ,
W e b c a m E r r o r : W e b c a m E r r o r
} ,
h o o k s : { } , / / c a l l b a c k h o o k f u n c t i o n s
i n i t : f u n c t i o n ( ) {
/ / i n i t i a l i z e , c h e c k f o r g e t U s e r M e d i a s u p p o r t
v a r s e l f = t h i s ;
/ / S e t u p g e t U s e r M e d i a , w i t h p o l y f i l l f o r o l d e r b r o w s e r s
/ / A d a p t e d f r o m : h t t p s : / / d e v e l o p e r . m o z i l l a . o r g / e n - U S / d o c s / W e b / A P I / M e d i a D e v i c e s / g e t U s e r M e d i a
t h i s . m e d i a D e v i c e s = ( n a v i g a t o r . m e d i a D e v i c e s & & n a v i g a t o r . m e d i a D e v i c e s . g e t U s e r M e d i a ) ?
n a v i g a t o r . m e d i a D e v i c e s : ( ( n a v i g a t o r . m o z G e t U s e r M e d i a | | n a v i g a t o r . w e b k i t G e t U s e r M e d i a ) ? {
g e t U s e r M e d i a : f u n c t i o n ( c ) {
r e t u r n n e w P r o m i s e ( f u n c t i o n ( y , n ) {
( n a v i g a t o r . m o z G e t U s e r M e d i a | |
n a v i g a t o r . w e b k i t G e t U s e r M e d i a ) . c a l l ( n a v i g a t o r , c , y , n ) ;
} ) ;
}
} : n u l l ) ;
w i n d o w . U R L = w i n d o w . U R L | | w i n d o w . w e b k i t U R L | | w i n d o w . m o z U R L | | w i n d o w . m s U R L ;
t h i s . u s e r M e d i a = t h i s . u s e r M e d i a & & ! ! t h i s . m e d i a D e v i c e s & & ! ! w i n d o w . U R L ;
i f ( t h i s . i O S ) {
t h i s . u s e r M e d i a = n u l l ;
}
/ / O l d e r v e r s i o n s o f f i r e f o x ( < 2 1 ) a p p a r e n t l y c l a i m s u p p o r t b u t u s e r m e d i a d o e s n o t a c t u a l l y w o r k
i f ( n a v i g a t o r . u s e r A g e n t . m a t c h ( / F i r e f o x \ D + ( \ d + ) / ) ) {
i f ( p a r s e I n t ( R e g E x p . $ 1 , 1 0 ) < 2 1 ) t h i s . u s e r M e d i a = n u l l ;
}
/ / M a k e s u r e m e d i a s t r e a m i s c l o s e d w h e n n a v i g a t i n g a w a y f r o m p a g e
i f ( t h i s . u s e r M e d i a ) {
w i n d o w . a d d E v e n t L i s t e n e r ( ' b e f o r e u n l o a d ' , f u n c t i o n ( e v e n t ) {
s e l f . r e s e t ( ) ;
} ) ;
}
} ,
e x i f O r i e n t a t i o n : f u n c t i o n ( b i n F i l e ) {
/ / e x t r a c t o r i e n t a t i o n i n f o r m a t i o n f r o m t h e i m a g e p r o v i d e d b y i O S
/ / a l g o r i t h m b a s e d o n e x i f - j s
v a r d a t a V i e w = n e w D a t a V i e w ( b i n F i l e ) ;
i f ( ( d a t a V i e w . g e t U i n t 8 ( 0 ) ! = 0 x F F ) | | ( d a t a V i e w . g e t U i n t 8 ( 1 ) ! = 0 x D 8 ) ) {
c o n s o l e . l o g ( ' N o t a v a l i d J P E G f i l e ' ) ;
r e t u r n 0 ;
}
v a r o f f s e t = 2 ;
v a r m a r k e r = n u l l ;
w h i l e ( o f f s e t < b i n F i l e . b y t e L e n g t h ) {
/ / f i n d 0 x F F E 1 ( 2 2 5 m a r k e r )
i f ( d a t a V i e w . g e t U i n t 8 ( o f f s e t ) ! = 0 x F F ) {
c o n s o l e . l o g ( ' N o t a v a l i d m a r k e r a t o f f s e t ' + o f f s e t + ' , f o u n d : ' + d a t a V i e w . g e t U i n t 8 ( o f f s e t ) ) ;
r e t u r n 0 ;
}
m a r k e r = d a t a V i e w . g e t U i n t 8 ( o f f s e t + 1 ) ;
i f ( m a r k e r = = 2 2 5 ) {
o f f s e t + = 4 ;
v a r s t r = " " ;
f o r ( n = 0 ; n < 4 ; n + + ) {
s t r + = S t r i n g . f r o m C h a r C o d e ( d a t a V i e w . g e t U i n t 8 ( o f f s e t + n ) ) ;
}
i f ( s t r ! = ' E x i f ' ) {
c o n s o l e . l o g ( ' N o t v a l i d E X I F d a t a f o u n d ' ) ;
r e t u r n 0 ;
}
o f f s e t + = 6 ; / / t i f f O f f s e t
v a r b i g E n d = n u l l ;
/ / t e s t f o r T I F F v a l i d i t y a n d e n d i a n n e s s
i f ( d a t a V i e w . g e t U i n t 1 6 ( o f f s e t ) = = 0 x 4 9 4 9 ) {
b i g E n d = f a l s e ;
} e l s e i f ( d a t a V i e w . g e t U i n t 1 6 ( o f f s e t ) = = 0 x 4 D 4 D ) {
b i g E n d = t r u e ;
} e l s e {
c o n s o l e . l o g ( " N o t v a l i d T I F F d a t a ! ( n o 0 x 4 9 4 9 o r 0 x 4 D 4 D ) " ) ;
r e t u r n 0 ;
}
i f ( d a t a V i e w . g e t U i n t 1 6 ( o f f s e t + 2 , ! b i g E n d ) ! = 0 x 0 0 2 A ) {
c o n s o l e . l o g ( " N o t v a l i d T I F F d a t a ! ( n o 0 x 0 0 2 A ) " ) ;
r e t u r n 0 ;
}
v a r f i r s t I F D O f f s e t = d a t a V i e w . g e t U i n t 3 2 ( o f f s e t + 4 , ! b i g E n d ) ;
i f ( f i r s t I F D O f f s e t < 0 x 0 0 0 0 0 0 0 8 ) {
c o n s o l e . l o g ( " N o t v a l i d T I F F d a t a ! ( F i r s t o f f s e t l e s s t h a n 8 ) " , d a t a V i e w . g e t U i n t 3 2 ( o f f s e t + 4 , ! b i g E n d ) ) ;
r e t u r n 0 ;
}
/ / e x t r a c t o r i e n t a t i o n d a t a
v a r d a t a S t a r t = o f f s e t + f i r s t I F D O f f s e t ;
v a r e n t r i e s = d a t a V i e w . g e t U i n t 1 6 ( d a t a S t a r t , ! b i g E n d ) ;
f o r ( v a r i = 0 ; i < e n t r i e s ; i + + ) {
v a r e n t r y O f f s e t = d a t a S t a r t + i * 1 2 + 2 ;
i f ( d a t a V i e w . g e t U i n t 1 6 ( e n t r y O f f s e t , ! b i g E n d ) = = 0 x 0 1 1 2 ) {
v a r v a l u e T y p e = d a t a V i e w . g e t U i n t 1 6 ( e n t r y O f f s e t + 2 , ! b i g E n d ) ;
v a r n u m V a l u e s = d a t a V i e w . g e t U i n t 3 2 ( e n t r y O f f s e t + 4 , ! b i g E n d ) ;
i f ( v a l u e T y p e ! = 3 & & n u m V a l u e s ! = 1 ) {
c o n s o l e . l o g ( ' I n v a l i d E X I F o r i e n t a t i o n v a l u e t y p e ( ' + v a l u e T y p e + ' ) o r c o u n t ( ' + n u m V a l u e s + ' ) ' ) ;
r e t u r n 0 ;
}
v a r v a l u e = d a t a V i e w . g e t U i n t 1 6 ( e n t r y O f f s e t + 8 , ! b i g E n d ) ;
i f ( v a l u e < 1 | | v a l u e > 8 ) {
c o n s o l e . l o g ( ' I n v a l i d E X I F o r i e n t a t i o n v a l u e ( ' + v a l u e + ' ) ' ) ;
r e t u r n 0 ;
}
r e t u r n v a l u e ;
}
}
} e l s e {
o f f s e t + = 2 + d a t a V i e w . g e t U i n t 1 6 ( o f f s e t + 2 ) ;
}
}
r e t u r n 0 ;
} ,
f i x O r i e n t a t i o n : f u n c t i o n ( o r i g O b j U R L , o r i e n t a t i o n , t a r g e t I m g ) {
/ / f i x i m a g e o r i e n t a t i o n b a s e d o n e x i f o r i e n t a t i o n d a t a
/ / e x i f o r i e n t a t i o n i n f o r m a t i o n
/ / h t t p : / / w w w . i m p u l s e a d v e n t u r e . c o m / p h o t o / e x i f - o r i e n t a t i o n . h t m l
/ / l i n k s o u r c e w i k i p e d i a ( h t t p s : / / e n . w i k i p e d i a . o r g / w i k i / E x i f # c i t e _ n o t e - 2 0 )
v a r i m g = n e w I m a g e ( ) ;
i m g . a d d E v e n t L i s t e n e r ( ' l o a d ' , f u n c t i o n ( e v e n t ) {
v a r c a n v a s = d o c u m e n t . c r e a t e E l e m e n t ( ' c a n v a s ' ) ;
v a r c t x = c a n v a s . g e t C o n t e x t ( ' 2 d ' ) ;
/ / s w i t c h w i d t h h e i g h t i f o r i e n t a t i o n n e e d e d
i f ( o r i e n t a t i o n < 5 ) {
c a n v a s . w i d t h = i m g . w i d t h ;
c a n v a s . h e i g h t = i m g . h e i g h t ;
} e l s e {
c a n v a s . w i d t h = i m g . h e i g h t ;
c a n v a s . h e i g h t = i m g . w i d t h ;
}
/ / t r a n s f o r m ( r o t a t e ) i m a g e - s e e l i n k a t b e g i n n i n g t h i s m e t h o d
s w i t c h ( o r i e n t a t i o n ) {
c a s e 2 : c t x . t r a n s f o r m ( - 1 , 0 , 0 , 1 , i m g . w i d t h , 0 ) ; b r e a k ;
c a s e 3 : c t x . t r a n s f o r m ( - 1 , 0 , 0 , - 1 , i m g . w i d t h , i m g . h e i g h t ) ; b r e a k ;
c a s e 4 : c t x . t r a n s f o r m ( 1 , 0 , 0 , - 1 , 0 , i m g . h e i g h t ) ; b r e a k ;
c a s e 5 : c t x . t r a n s f o r m ( 0 , 1 , 1 , 0 , 0 , 0 ) ; b r e a k ;
c a s e 6 : c t x . t r a n s f o r m ( 0 , 1 , - 1 , 0 , i m g . h e i g h t , 0 ) ; b r e a k ;
c a s e 7 : c t x . t r a n s f o r m ( 0 , - 1 , - 1 , 0 , i m g . h e i g h t , i m g . w i d t h ) ; b r e a k ;
c a s e 8 : c t x . t r a n s f o r m ( 0 , - 1 , 1 , 0 , 0 , i m g . w i d t h ) ; b r e a k ;
}
c t x . d r a w I m a g e ( i m g , 0 , 0 ) ;
/ / p a s s r o t a t e d i m a g e d a t a t o t h e t a r g e t i m a g e c o n t a i n e r
t a r g e t I m g . s r c = c a n v a s . t o D a t a U R L ( ) ;
} , f a l s e ) ;
/ / s t a r t t r a n s f o r m a t i o n b y l o a d e v e n t
i m g . s r c = o r i g O b j U R L ;
} ,
a t t a c h : f u n c t i o n ( e l e m ) {
/ / c r e a t e w e b c a m p r e v i e w a n d a t t a c h t o D O M e l e m e n t
/ / p a s s i n a c t u a l D O M r e f e r e n c e , I D , o r C S S s e l e c t o r
i f ( t y p e o f ( e l e m ) = = ' s t r i n g ' ) {
e l e m = d o c u m e n t . g e t E l e m e n t B y I d ( e l e m ) | | d o c u m e n t . q u e r y S e l e c t o r ( e l e m ) ;
}
i f ( ! e l e m ) {
r e t u r n t h i s . d i s p a t c h ( ' e r r o r ' , n e w W e b c a m E r r o r ( " C o u l d n o t l o c a t e D O M e l e m e n t t o a t t a c h t o . " ) ) ;
}
t h i s . c o n t a i n e r = e l e m ;
e l e m . i n n e r H T M L = ' ' ; / / s t a r t w i t h e m p t y e l e m e n t
/ / i n s e r t " p e g " s o w e c a n i n s e r t o u r p r e v i e w c a n v a s a d j a c e n t t o i t l a t e r o n
v a r p e g = d o c u m e n t . c r e a t e E l e m e n t ( ' d i v ' ) ;
e l e m . a p p e n d C h i l d ( p e g ) ;
t h i s . p e g = p e g ;
/ / s e t w i d t h / h e i g h t i f n o t a l r e a d y s e t
i f ( ! t h i s . p a r a m s . w i d t h ) t h i s . p a r a m s . w i d t h = e l e m . o f f s e t W i d t h ;
i f ( ! t h i s . p a r a m s . h e i g h t ) t h i s . p a r a m s . h e i g h t = e l e m . o f f s e t H e i g h t ;
/ / m a k e s u r e w e h a v e a n o n z e r o w i d t h a n d h e i g h t a t t h i s p o i n t
i f ( ! t h i s . p a r a m s . w i d t h | | ! t h i s . p a r a m s . h e i g h t ) {
r e t u r n t h i s . d i s p a t c h ( ' e r r o r ' , n e w W e b c a m E r r o r ( " N o w i d t h a n d / o r h e i g h t f o r w e b c a m . P l e a s e c a l l s e t ( ) f i r s t , o r a t t a c h t o a v i s i b l e e l e m e n t . " ) ) ;
}
/ / s e t d e f a u l t s f o r d e s t _ w i d t h / d e s t _ h e i g h t i f n o t s e t
i f ( ! t h i s . p a r a m s . d e s t _ w i d t h ) t h i s . p a r a m s . d e s t _ w i d t h = t h i s . p a r a m s . w i d t h ;
i f ( ! t h i s . p a r a m s . d e s t _ h e i g h t ) t h i s . p a r a m s . d e s t _ h e i g h t = t h i s . p a r a m s . h e i g h t ;
t h i s . u s e r M e d i a = _ u s e r M e d i a = = = u n d e f i n e d ? t h i s . u s e r M e d i a : _ u s e r M e d i a ;
/ / i f f o r c e _ f l a s h i s s e t , d i s a b l e u s e r M e d i a
i f ( t h i s . p a r a m s . f o r c e _ f l a s h ) {
_ u s e r M e d i a = t h i s . u s e r M e d i a ;
t h i s . u s e r M e d i a = n u l l ;
}
/ / c h e c k f o r d e f a u l t f p s
i f ( t y p e o f t h i s . p a r a m s . f p s ! = = " n u m b e r " ) t h i s . p a r a m s . f p s = 3 0 ;
/ / a d j u s t s c a l e i f d e s t _ w i d t h o r d e s t _ h e i g h t i s d i f f e r e n t
v a r s c a l e X = t h i s . p a r a m s . w i d t h / t h i s . p a r a m s . d e s t _ w i d t h ;
v a r s c a l e Y = t h i s . p a r a m s . h e i g h t / t h i s . p a r a m s . d e s t _ h e i g h t ;
i f ( t h i s . u s e r M e d i a ) {
/ / s e t u p w e b c a m v i d e o c o n t a i n e r
v a r v i d e o = d o c u m e n t . c r e a t e E l e m e n t ( ' v i d e o ' ) ;
v i d e o . s e t A t t r i b u t e ( ' a u t o p l a y ' , ' a u t o p l a y ' ) ;
v i d e o . s t y l e . w i d t h = ' ' + t h i s . p a r a m s . d e s t _ w i d t h + ' p x ' ;
v i d e o . s t y l e . h e i g h t = ' ' + t h i s . p a r a m s . d e s t _ h e i g h t + ' p x ' ;
i f ( ( s c a l e X ! = 1 . 0 ) | | ( s c a l e Y ! = 1 . 0 ) ) {
e l e m . s t y l e . o v e r f l o w = ' h i d d e n ' ;
v i d e o . s t y l e . w e b k i t T r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
v i d e o . s t y l e . m o z T r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
v i d e o . s t y l e . m s T r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
v i d e o . s t y l e . o T r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
v i d e o . s t y l e . t r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
v i d e o . s t y l e . w e b k i t T r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
v i d e o . s t y l e . m o z T r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
v i d e o . s t y l e . m s T r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
v i d e o . s t y l e . o T r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
v i d e o . s t y l e . t r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
}
/ / a d d v i d e o e l e m e n t t o d o m
e l e m . a p p e n d C h i l d ( v i d e o ) ;
t h i s . v i d e o = v i d e o ;
/ / a s k u s e r f o r a c c e s s t o t h e i r c a m e r a
v a r s e l f = t h i s ;
t h i s . m e d i a D e v i c e s . g e t U s e r M e d i a ( {
" a u d i o " : f a l s e ,
" v i d e o " : t h i s . p a r a m s . c o n s t r a i n t s | | {
m a n d a t o r y : {
m i n W i d t h : t h i s . p a r a m s . d e s t _ w i d t h ,
m i n H e i g h t : t h i s . p a r a m s . d e s t _ h e i g h t
}
}
} )
. t h e n ( f u n c t i o n ( s t r e a m ) {
/ / g o t a c c e s s , a t t a c h s t r e a m t o v i d e o
v i d e o . o n l o a d e d m e t a d a t a = f u n c t i o n ( e ) {
s e l f . s t r e a m = s t r e a m ;
s e l f . l o a d e d = t r u e ;
s e l f . l i v e = t r u e ;
s e l f . d i s p a t c h ( ' l o a d ' ) ;
s e l f . d i s p a t c h ( ' l i v e ' ) ;
s e l f . f l i p ( ) ;
} ;
/ / a s w i n d o w . U R L . c r e a t e O b j e c t U R L ( ) i s d e p r e c a t e d , a d d i n g a c h e c k s o t h a t i t w o r k s i n S a f a r i .
/ / o l d e r b r o w s e r s m a y n o t h a v e s r c O b j e c t
i f ( " s r c O b j e c t " i n v i d e o ) {
v i d e o . s r c O b j e c t = s t r e a m ;
}
e l s e {
/ / u s i n g U R L . c r e a t e O b j e c t U R L ( ) a s f a l l b a c k f o r o l d b r o w s e r s
v i d e o . s r c = w i n d o w . U R L . c r e a t e O b j e c t U R L ( s t r e a m ) ;
}
} )
. c a t c h ( f u n c t i o n ( e r r ) {
/ / J H 2 0 1 6 - 0 7 - 3 1 I n s t e a d o f d i s p a t c h i n g e r r o r , n o w f a l l i n g b a c k t o F l a s h i f u s e r M e d i a f a i l s ( t h x @ j o h n 2 0 1 4 )
/ / J H 2 0 1 6 - 0 8 - 0 7 B u t o n l y i f f l a s h i s a c t u a l l y i n s t a l l e d - - i f n o t , d i s p a t c h e r r o r h e r e a n d n o w .
i f ( s e l f . p a r a m s . e n a b l e _ f l a s h & & s e l f . d e t e c t F l a s h ( ) ) {
s e t T i m e o u t ( f u n c t i o n ( ) { s e l f . p a r a m s . f o r c e _ f l a s h = 1 ; s e l f . a t t a c h ( e l e m ) ; } , 1 ) ;
}
e l s e {
s e l f . d i s p a t c h ( ' e r r o r ' , e r r ) ;
}
} ) ;
}
e l s e i f ( t h i s . i O S ) {
/ / p r e p a r e H T M L e l e m e n t s
v a r d i v = d o c u m e n t . c r e a t e E l e m e n t ( ' d i v ' ) ;
d i v . i d = t h i s . c o n t a i n e r . i d + ' - i o s _ d i v ' ;
d i v . c l a s s N a m e = ' w e b c a m j s - i o s - p l a c e h o l d e r ' ;
d i v . s t y l e . w i d t h = ' ' + t h i s . p a r a m s . w i d t h + ' p x ' ;
d i v . s t y l e . h e i g h t = ' ' + t h i s . p a r a m s . h e i g h t + ' p x ' ;
d i v . s t y l e . t e x t A l i g n = ' c e n t e r ' ;
d i v . s t y l e . d i s p l a y = ' t a b l e - c e l l ' ;
d i v . s t y l e . v e r t i c a l A l i g n = ' m i d d l e ' ;
d i v . s t y l e . b a c k g r o u n d R e p e a t = ' n o - r e p e a t ' ;
d i v . s t y l e . b a c k g r o u n d S i z e = ' c o n t a i n ' ;
d i v . s t y l e . b a c k g r o u n d P o s i t i o n = ' c e n t e r ' ;
v a r s p a n = d o c u m e n t . c r e a t e E l e m e n t ( ' s p a n ' ) ;
s p a n . c l a s s N a m e = ' w e b c a m j s - i o s - t e x t ' ;
s p a n . i n n e r H T M L = t h i s . p a r a m s . i o s P l a c e h o l d e r T e x t ;
d i v . a p p e n d C h i l d ( s p a n ) ;
v a r i m g = d o c u m e n t . c r e a t e E l e m e n t ( ' i m g ' ) ;
i m g . i d = t h i s . c o n t a i n e r . i d + ' - i o s _ i m g ' ;
i m g . s t y l e . w i d t h = ' ' + t h i s . p a r a m s . d e s t _ w i d t h + ' p x ' ;
i m g . s t y l e . h e i g h t = ' ' + t h i s . p a r a m s . d e s t _ h e i g h t + ' p x ' ;
i m g . s t y l e . d i s p l a y = ' n o n e ' ;
d i v . a p p e n d C h i l d ( i m g ) ;
v a r i n p u t = d o c u m e n t . c r e a t e E l e m e n t ( ' i n p u t ' ) ;
i n p u t . i d = t h i s . c o n t a i n e r . i d + ' - i o s _ i n p u t ' ;
i n p u t . s e t A t t r i b u t e ( ' t y p e ' , ' f i l e ' ) ;
i n p u t . s e t A t t r i b u t e ( ' a c c e p t ' , ' i m a g e / * ' ) ;
i n p u t . s e t A t t r i b u t e ( ' c a p t u r e ' , ' c a m e r a ' ) ;
v a r s e l f = t h i s ;
v a r p a r a m s = t h i s . p a r a m s ;
/ / a d d i n p u t l i s t e n e r t o l o a d t h e s e l e c t e d i m a g e
i n p u t . a d d E v e n t L i s t e n e r ( ' c h a n g e ' , f u n c t i o n ( e v e n t ) {
i f ( e v e n t . t a r g e t . f i l e s . l e n g t h > 0 & & e v e n t . t a r g e t . f i l e s [ 0 ] . t y p e . i n d e x O f ( ' i m a g e / ' ) = = 0 ) {
v a r o b j U R L = U R L . c r e a t e O b j e c t U R L ( e v e n t . t a r g e t . f i l e s [ 0 ] ) ;
/ / l o a d i m a g e w i t h a u t o s c a l e a n d c r o p
v a r i m a g e = n e w I m a g e ( ) ;
i m a g e . a d d E v e n t L i s t e n e r ( ' l o a d ' , f u n c t i o n ( e v e n t ) {
v a r c a n v a s = d o c u m e n t . c r e a t e E l e m e n t ( ' c a n v a s ' ) ;
c a n v a s . w i d t h = p a r a m s . d e s t _ w i d t h ;
c a n v a s . h e i g h t = p a r a m s . d e s t _ h e i g h t ;
v a r c t x = c a n v a s . g e t C o n t e x t ( ' 2 d ' ) ;
/ / c r o p a n d s c a l e i m a g e f o r f i n a l s i z e
r a t i o = M a t h . m i n ( i m a g e . w i d t h / p a r a m s . d e s t _ w i d t h , i m a g e . h e i g h t / p a r a m s . d e s t _ h e i g h t ) ;
v a r s w = p a r a m s . d e s t _ w i d t h * r a t i o ;
v a r s h = p a r a m s . d e s t _ h e i g h t * r a t i o ;
v a r s x = ( i m a g e . w i d t h - s w ) / 2 ;
v a r s y = ( i m a g e . h e i g h t - s h ) / 2 ;
c t x . d r a w I m a g e ( i m a g e , s x , s y , s w , s h , 0 , 0 , p a r a m s . d e s t _ w i d t h , p a r a m s . d e s t _ h e i g h t ) ;
v a r d a t a U R L = c a n v a s . t o D a t a U R L ( ) ;
i m g . s r c = d a t a U R L ;
d i v . s t y l e . b a c k g r o u n d I m a g e = " u r l ( ' " + d a t a U R L + " ' ) " ;
} , f a l s e ) ;
/ / r e a d E X I F d a t a
v a r f i l e R e a d e r = n e w F i l e R e a d e r ( ) ;
f i l e R e a d e r . a d d E v e n t L i s t e n e r ( ' l o a d ' , f u n c t i o n ( e ) {
v a r o r i e n t a t i o n = s e l f . e x i f O r i e n t a t i o n ( e . t a r g e t . r e s u l t ) ;
i f ( o r i e n t a t i o n > 1 ) {
/ / i m a g e n e e d t o r o t a t e ( s e e c o m m e n t s o n f i x O r i e n t a t i o n m e t h o d f o r m o r e i n f o r m a t i o n )
/ / t r a n s f o r m i m a g e a n d l o a d t o i m a g e o b j e c t
s e l f . f i x O r i e n t a t i o n ( o b j U R L , o r i e n t a t i o n , i m a g e ) ;
} e l s e {
/ / l o a d i m a g e d a t a t o i m a g e o b j e c t
i m a g e . s r c = o b j U R L ;
}
} , f a l s e ) ;
/ / C o n v e r t i m a g e d a t a t o b l o b f o r m a t
v a r h t t p = n e w X M L H t t p R e q u e s t ( ) ;
h t t p . o p e n ( " G E T " , o b j U R L , t r u e ) ;
h t t p . r e s p o n s e T y p e = " b l o b " ;
h t t p . o n l o a d = f u n c t i o n ( e ) {
i f ( t h i s . s t a t u s = = 2 0 0 | | t h i s . s t a t u s = = = 0 ) {
f i l e R e a d e r . r e a d A s A r r a y B u f f e r ( t h i s . r e s p o n s e ) ;
}
} ;
h t t p . s e n d ( ) ;
}
} , f a l s e ) ;
i n p u t . s t y l e . d i s p l a y = ' n o n e ' ;
e l e m . a p p e n d C h i l d ( i n p u t ) ;
/ / m a k e d i v c l i c k a b l e f o r o p e n c a m e r a i n t e r f a c e
d i v . a d d E v e n t L i s t e n e r ( ' c l i c k ' , f u n c t i o n ( e v e n t ) {
i f ( p a r a m s . u s e r _ c a l l b a c k ) {
/ / g l o b a l u s e r _ c a l l b a c k d e f i n e d - c r e a t e t h e s n a p s h o t
s e l f . s n a p ( p a r a m s . u s e r _ c a l l b a c k , p a r a m s . u s e r _ c a n v a s ) ;
} e l s e {
/ / n o g l o b a l c a l l b a c k d e f i n i e d f o r s n a p s h o t , l o a d i m a g e a n d w a i t f o r e x t e r n a l s n a p m e t h o d c a l l
i n p u t . s t y l e . d i s p l a y = ' b l o c k ' ;
i n p u t . f o c u s ( ) ;
i n p u t . c l i c k ( ) ;
i n p u t . s t y l e . d i s p l a y = ' n o n e ' ;
}
} , f a l s e ) ;
e l e m . a p p e n d C h i l d ( d i v ) ;
t h i s . l o a d e d = t r u e ;
t h i s . l i v e = t r u e ;
}
e l s e i f ( t h i s . p a r a m s . e n a b l e _ f l a s h & & t h i s . d e t e c t F l a s h ( ) ) {
/ / f l a s h f a l l b a c k
w i n d o w . W e b c a m = W e b c a m ; / / n e e d e d f o r f l a s h - t o - j s i n t e r f a c e
v a r d i v = d o c u m e n t . c r e a t e E l e m e n t ( ' d i v ' ) ;
d i v . i n n e r H T M L = t h i s . g e t S W F H T M L ( ) ;
e l e m . a p p e n d C h i l d ( d i v ) ;
}
e l s e {
t h i s . d i s p a t c h ( ' e r r o r ' , n e w W e b c a m E r r o r ( t h i s . p a r a m s . n o I n t e r f a c e F o u n d T e x t ) ) ;
}
/ / s e t u p f i n a l c r o p f o r l i v e p r e v i e w
i f ( t h i s . p a r a m s . c r o p _ w i d t h & & t h i s . p a r a m s . c r o p _ h e i g h t ) {
v a r s c a l e d _ c r o p _ w i d t h = M a t h . f l o o r ( t h i s . p a r a m s . c r o p _ w i d t h * s c a l e X ) ;
v a r s c a l e d _ c r o p _ h e i g h t = M a t h . f l o o r ( t h i s . p a r a m s . c r o p _ h e i g h t * s c a l e Y ) ;
e l e m . s t y l e . w i d t h = ' ' + s c a l e d _ c r o p _ w i d t h + ' p x ' ;
e l e m . s t y l e . h e i g h t = ' ' + s c a l e d _ c r o p _ h e i g h t + ' p x ' ;
e l e m . s t y l e . o v e r f l o w = ' h i d d e n ' ;
e l e m . s c r o l l L e f t = M a t h . f l o o r ( ( t h i s . p a r a m s . w i d t h / 2 ) - ( s c a l e d _ c r o p _ w i d t h / 2 ) ) ;
e l e m . s c r o l l T o p = M a t h . f l o o r ( ( t h i s . p a r a m s . h e i g h t / 2 ) - ( s c a l e d _ c r o p _ h e i g h t / 2 ) ) ;
}
e l s e {
/ / n o c r o p , s e t s i z e t o d e s i r e d
e l e m . s t y l e . w i d t h = ' ' + t h i s . p a r a m s . w i d t h + ' p x ' ;
e l e m . s t y l e . h e i g h t = ' ' + t h i s . p a r a m s . h e i g h t + ' p x ' ;
}
} ,
r e s e t : f u n c t i o n ( ) {
/ / s h u t d o w n c a m e r a , r e s e t t o p o t e n t i a l l y a t t a c h a g a i n
i f ( t h i s . p r e v i e w _ a c t i v e ) t h i s . u n f r e e z e ( ) ;
/ / a t t e m p t t o f i x i s s u e # 6 4
t h i s . u n f l i p ( ) ;
i f ( t h i s . u s e r M e d i a ) {
i f ( t h i s . s t r e a m ) {
i f ( t h i s . s t r e a m . g e t V i d e o T r a c k s ) {
/ / g e t v i d e o t r a c k t o c a l l s t o p o n i t
v a r t r a c k s = t h i s . s t r e a m . g e t V i d e o T r a c k s ( ) ;
i f ( t r a c k s & & t r a c k s [ 0 ] & & t r a c k s [ 0 ] . s t o p ) t r a c k s [ 0 ] . s t o p ( ) ;
}
e l s e i f ( t h i s . s t r e a m . s t o p ) {
/ / d e p r e c a t e d , m a y b e r e m o v e d i n f u t u r e
t h i s . s t r e a m . s t o p ( ) ;
}
}
d e l e t e t h i s . s t r e a m ;
d e l e t e t h i s . v i d e o ;
}
i f ( ( t h i s . u s e r M e d i a ! = = t r u e ) & & t h i s . l o a d e d & & ! t h i s . i O S ) {
/ / c a l l f o r t u r n o f f c a m e r a i n f l a s h
v a r m o v i e = t h i s . g e t M o v i e ( ) ;
i f ( m o v i e & & m o v i e . _ r e l e a s e C a m e r a ) m o v i e . _ r e l e a s e C a m e r a ( ) ;
}
i f ( t h i s . c o n t a i n e r ) {
t h i s . c o n t a i n e r . i n n e r H T M L = ' ' ;
d e l e t e t h i s . c o n t a i n e r ;
}
t h i s . l o a d e d = f a l s e ;
t h i s . l i v e = f a l s e ;
} ,
s e t : f u n c t i o n ( ) {
/ / s e t o n e o r m o r e p a r a m s
/ / v a r i a b l e a r g u m e n t l i s t : 1 p a r a m = h a s h , 2 p a r a m s = k e y , v a l u e
i f ( a r g u m e n t s . l e n g t h = = 1 ) {
f o r ( v a r k e y i n a r g u m e n t s [ 0 ] ) {
t h i s . p a r a m s [ k e y ] = a r g u m e n t s [ 0 ] [ k e y ] ;
}
}
e l s e {
t h i s . p a r a m s [ a r g u m e n t s [ 0 ] ] = a r g u m e n t s [ 1 ] ;
}
} ,
o n : f u n c t i o n ( n a m e , c a l l b a c k ) {
/ / s e t c a l l b a c k h o o k
n a m e = n a m e . r e p l a c e ( / ^ o n / i , ' ' ) . t o L o w e r C a s e ( ) ;
i f ( ! t h i s . h o o k s [ n a m e ] ) t h i s . h o o k s [ n a m e ] = [ ] ;
t h i s . h o o k s [ n a m e ] . p u s h ( c a l l b a c k ) ;
} ,
o f f : f u n c t i o n ( n a m e , c a l l b a c k ) {
/ / r e m o v e c a l l b a c k h o o k
n a m e = n a m e . r e p l a c e ( / ^ o n / i , ' ' ) . t o L o w e r C a s e ( ) ;
i f ( t h i s . h o o k s [ n a m e ] ) {
i f ( c a l l b a c k ) {
/ / r e m o v e o n e s e l e c t e d c a l l b a c k f r o m l i s t
v a r i d x = t h i s . h o o k s [ n a m e ] . i n d e x O f ( c a l l b a c k ) ;
i f ( i d x > - 1 ) t h i s . h o o k s [ n a m e ] . s p l i c e ( i d x , 1 ) ;
}
e l s e {
/ / n o c a l l b a c k s p e c i f i e d , s o c l e a r a l l
t h i s . h o o k s [ n a m e ] = [ ] ;
}
}
} ,
d i s p a t c h : f u n c t i o n ( ) {
/ / f i r e h o o k c a l l b a c k , p a s s i n g o p t i o n a l v a l u e t o i t
v a r n a m e = a r g u m e n t s [ 0 ] . r e p l a c e ( / ^ o n / i , ' ' ) . t o L o w e r C a s e ( ) ;
v a r a r g s = A r r a y . p r o t o t y p e . s l i c e . c a l l ( a r g u m e n t s , 1 ) ;
i f ( t h i s . h o o k s [ n a m e ] & & t h i s . h o o k s [ n a m e ] . l e n g t h ) {
f o r ( v a r i d x = 0 , l e n = t h i s . h o o k s [ n a m e ] . l e n g t h ; i d x < l e n ; i d x + + ) {
v a r h o o k = t h i s . h o o k s [ n a m e ] [ i d x ] ;
i f ( t y p e o f ( h o o k ) = = ' f u n c t i o n ' ) {
/ / c a l l b a c k i s f u n c t i o n r e f e r e n c e , c a l l d i r e c t l y
h o o k . a p p l y ( t h i s , a r g s ) ;
}
e l s e i f ( ( t y p e o f ( h o o k ) = = ' o b j e c t ' ) & & ( h o o k . l e n g t h = = 2 ) ) {
/ / c a l l b a c k i s P H P - s t y l e o b j e c t i n s t a n c e m e t h o d
h o o k [ 0 ] [ h o o k [ 1 ] ] . a p p l y ( h o o k [ 0 ] , a r g s ) ;
}
e l s e i f ( w i n d o w [ h o o k ] ) {
/ / c a l l b a c k i s g l o b a l f u n c t i o n n a m e
w i n d o w [ h o o k ] . a p p l y ( w i n d o w , a r g s ) ;
}
} / / l o o p
r e t u r n t r u e ;
}
e l s e i f ( n a m e = = ' e r r o r ' ) {
v a r m e s s a g e ;
i f ( ( a r g s [ 0 ] i n s t a n c e o f F l a s h E r r o r ) | | ( a r g s [ 0 ] i n s t a n c e o f W e b c a m E r r o r ) ) {
m e s s a g e = a r g s [ 0 ] . m e s s a g e ;
} e l s e {
m e s s a g e = " C o u l d n o t a c c e s s w e b c a m : " + a r g s [ 0 ] . n a m e + " : " +
a r g s [ 0 ] . m e s s a g e + " " + a r g s [ 0 ] . t o S t r i n g ( ) ;
}
/ / d e f a u l t e r r o r h a n d l e r i f n o c u s t o m o n e s p e c i f i e d
a l e r t ( " W e b c a m . j s E r r o r : " + m e s s a g e ) ;
}
r e t u r n f a l s e ; / / n o h o o k d e f i n e d
} ,
s e t S W F L o c a t i o n : f u n c t i o n ( v a l u e ) {
/ / f o r b a c k w a r d c o m p a t i b i l i t y .
t h i s . s e t ( ' s w f U R L ' , v a l u e ) ;
} ,
d e t e c t F l a s h : f u n c t i o n ( ) {
/ / r e t u r n t r u e i f b r o w s e r s u p p o r t s f l a s h , f a l s e o t h e r w i s e
/ / C o d e s n i p p e t b o r r o w e d f r o m : h t t p s : / / g i t h u b . c o m / s w f o b j e c t / s w f o b j e c t
v a r S H O C K W A V E _ F L A S H = " S h o c k w a v e F l a s h " ,
S H O C K W A V E _ F L A S H _ A X = " S h o c k w a v e F l a s h . S h o c k w a v e F l a s h " ,
F L A S H _ M I M E _ T Y P E = " a p p l i c a t i o n / x - s h o c k w a v e - f l a s h " ,
w i n = w i n d o w ,
n a v = n a v i g a t o r ,
h a s F l a s h = f a l s e ;
i f ( t y p e o f n a v . p l u g i n s ! = = " u n d e f i n e d " & & t y p e o f n a v . p l u g i n s [ S H O C K W A V E _ F L A S H ] = = = " o b j e c t " ) {
v a r d e s c = n a v . p l u g i n s [ S H O C K W A V E _ F L A S H ] . d e s c r i p t i o n ;
i f ( d e s c & & ( t y p e o f n a v . m i m e T y p e s ! = = " u n d e f i n e d " & & n a v . m i m e T y p e s [ F L A S H _ M I M E _ T Y P E ] & & n a v . m i m e T y p e s [ F L A S H _ M I M E _ T Y P E ] . e n a b l e d P l u g i n ) ) {
h a s F l a s h = t r u e ;
}
}
e l s e i f ( t y p e o f w i n . A c t i v e X O b j e c t ! = = " u n d e f i n e d " ) {
t r y {
v a r a x = n e w A c t i v e X O b j e c t ( S H O C K W A V E _ F L A S H _ A X ) ;
i f ( a x ) {
v a r v e r = a x . G e t V a r i a b l e ( " $ v e r s i o n " ) ;
i f ( v e r ) h a s F l a s h = t r u e ;
}
}
c a t c h ( e ) { ; }
}
r e t u r n h a s F l a s h ;
} ,
g e t S W F H T M L : f u n c t i o n ( ) {
/ / R e t u r n H T M L f o r e m b e d d i n g f l a s h b a s e d w e b c a m c a p t u r e m o v i e
v a r h t m l = ' ' ,
s w f U R L = t h i s . p a r a m s . s w f U R L ;
/ / m a k e s u r e w e a r e n ' t r u n n i n g l o c a l l y ( f l a s h d o e s n ' t w o r k )
i f ( l o c a t i o n . p r o t o c o l . m a t c h ( / f i l e / ) ) {
t h i s . d i s p a t c h ( ' e r r o r ' , n e w F l a s h E r r o r ( " F l a s h d o e s n o t w o r k f r o m l o c a l d i s k . P l e a s e r u n f r o m a w e b s e r v e r . " ) ) ;
r e t u r n ' < h 3 s t y l e = " c o l o r : r e d " > E R R O R : t h e W e b c a m . j s F l a s h f a l l b a c k d o e s n o t w o r k f r o m l o c a l d i s k . P l e a s e r u n i t f r o m a w e b s e r v e r . < / h 3 > ' ;
}
/ / m a k e s u r e w e h a v e f l a s h
i f ( ! t h i s . d e t e c t F l a s h ( ) ) {
t h i s . d i s p a t c h ( ' e r r o r ' , n e w F l a s h E r r o r ( " A d o b e F l a s h P l a y e r n o t f o u n d . P l e a s e i n s t a l l f r o m g e t . a d o b e . c o m / f l a s h p l a y e r a n d t r y a g a i n . " ) ) ;
r e t u r n ' < h 3 s t y l e = " c o l o r : r e d " > ' + t h i s . p a r a m s . f l a s h N o t D e t e c t e d T e x t + ' < / h 3 > ' ;
}
/ / s e t d e f a u l t s w f U R L i f n o t e x p l i c i t l y s e t
i f ( ! s w f U R L ) {
/ / f i n d o u r s c r i p t t a g , a n d u s e t h a t b a s e U R L
v a r b a s e _ u r l = ' ' ;
v a r s c p t s = d o c u m e n t . g e t E l e m e n t s B y T a g N a m e ( ' s c r i p t ' ) ;
f o r ( v a r i d x = 0 , l e n = s c p t s . l e n g t h ; i d x < l e n ; i d x + + ) {
v a r s r c = s c p t s [ i d x ] . g e t A t t r i b u t e ( ' s r c ' ) ;
i f ( s r c & & s r c . m a t c h ( / \ / w e b c a m ( \ . m i n ) ? \ . j s / ) ) {
b a s e _ u r l = s r c . r e p l a c e ( / \ / w e b c a m ( \ . m i n ) ? \ . j s . * $ / , ' ' ) ;
i d x = l e n ;
}
}
i f ( b a s e _ u r l ) s w f U R L = b a s e _ u r l + ' / w e b c a m . s w f ' ;
e l s e s w f U R L = ' w e b c a m . s w f ' ;
}
/ / i f t h i s i s t h e u s e r ' s f i r s t v i s i t , s e t f l a s h v a r s o f l a s h p r i v a c y s e t t i n g s p a n e l i s s h o w n f i r s t
i f ( w i n d o w . l o c a l S t o r a g e & & ! l o c a l S t o r a g e . g e t I t e m ( ' v i s i t e d ' ) ) {
t h i s . p a r a m s . n e w _ u s e r = 1 ;
l o c a l S t o r a g e . s e t I t e m ( ' v i s i t e d ' , 1 ) ;
}
/ / c o n s t r u c t f l a s h v a r s s t r i n g
v a r f l a s h v a r s = ' ' ;
f o r ( v a r k e y i n t h i s . p a r a m s ) {
i f ( f l a s h v a r s ) f l a s h v a r s + = ' & ' ;
f l a s h v a r s + = k e y + ' = ' + e s c a p e ( t h i s . p a r a m s [ k e y ] ) ;
}
/ / c o n s t r u c t o b j e c t / e m b e d t a g
h t m l + = ' < o b j e c t c l a s s i d = " c l s i d : d 2 7 c d b 6 e - a e 6 d - 1 1 c f - 9 6 b 8 - 4 4 4 5 5 3 5 4 0 0 0 0 " t y p e = " a p p l i c a t i o n / x - s h o c k w a v e - f l a s h " c o d e b a s e = " ' + t h i s . p r o t o c o l + ' : / / d o w n l o a d . m a c r o m e d i a . c o m / p u b / s h o c k w a v e / c a b s / f l a s h / s w f l a s h . c a b # v e r s i o n = 9 , 0 , 0 , 0 " w i d t h = " ' + t h i s . p a r a m s . w i d t h + ' " h e i g h t = " ' + t h i s . p a r a m s . h e i g h t + ' " i d = " w e b c a m _ m o v i e _ o b j " a l i g n = " m i d d l e " > < p a r a m n a m e = " w m o d e " v a l u e = " o p a q u e " / > < p a r a m n a m e = " a l l o w S c r i p t A c c e s s " v a l u e = " a l w a y s " / > < p a r a m n a m e = " a l l o w F u l l S c r e e n " v a l u e = " f a l s e " / > < p a r a m n a m e = " m o v i e " v a l u e = " ' + s w f U R L + ' " / > < p a r a m n a m e = " l o o p " v a l u e = " f a l s e " / > < p a r a m n a m e = " m e n u " v a l u e = " f a l s e " / > < p a r a m n a m e = " q u a l i t y " v a l u e = " b e s t " / > < p a r a m n a m e = " b g c o l o r " v a l u e = " # f f f f f f " / > < p a r a m n a m e = " f l a s h v a r s " v a l u e = " ' + f l a s h v a r s + ' " / > < e m b e d i d = " w e b c a m _ m o v i e _ e m b e d " s r c = " ' + s w f U R L + ' " w m o d e = " o p a q u e " l o o p = " f a l s e " m e n u = " f a l s e " q u a l i t y = " b e s t " b g c o l o r = " # f f f f f f " w i d t h = " ' + t h i s . p a r a m s . w i d t h + ' " h e i g h t = " ' + t h i s . p a r a m s . h e i g h t + ' " n a m e = " w e b c a m _ m o v i e _ e m b e d " a l i g n = " m i d d l e " a l l o w S c r i p t A c c e s s = " a l w a y s " a l l o w F u l l S c r e e n = " f a l s e " t y p e = " a p p l i c a t i o n / x - s h o c k w a v e - f l a s h " p l u g i n s p a g e = " h t t p : / / w w w . m a c r o m e d i a . c o m / g o / g e t f l a s h p l a y e r " f l a s h v a r s = " ' + f l a s h v a r s + ' " > < / e m b e d > < / o b j e c t > ' ;
r e t u r n h t m l ;
} ,
g e t M o v i e : f u n c t i o n ( ) {
/ / g e t r e f e r e n c e t o m o v i e o b j e c t / e m b e d i n D O M
i f ( ! t h i s . l o a d e d ) r e t u r n t h i s . d i s p a t c h ( ' e r r o r ' , n e w F l a s h E r r o r ( " F l a s h M o v i e i s n o t l o a d e d y e t " ) ) ;
v a r m o v i e = d o c u m e n t . g e t E l e m e n t B y I d ( ' w e b c a m _ m o v i e _ o b j ' ) ;
i f ( ! m o v i e | | ! m o v i e . _ s n a p ) m o v i e = d o c u m e n t . g e t E l e m e n t B y I d ( ' w e b c a m _ m o v i e _ e m b e d ' ) ;
i f ( ! m o v i e ) t h i s . d i s p a t c h ( ' e r r o r ' , n e w F l a s h E r r o r ( " C a n n o t l o c a t e F l a s h m o v i e i n D O M " ) ) ;
r e t u r n m o v i e ;
} ,
f r e e z e : f u n c t i o n ( ) {
/ / s h o w p r e v i e w , f r e e z e c a m e r a
v a r s e l f = t h i s ;
v a r p a r a m s = t h i s . p a r a m s ;
/ / k i l l p r e v i e w i f a l r e a d y a c t i v e
i f ( t h i s . p r e v i e w _ a c t i v e ) t h i s . u n f r e e z e ( ) ;
/ / d e t e r m i n e s c a l e f a c t o r
v a r s c a l e X = t h i s . p a r a m s . w i d t h / t h i s . p a r a m s . d e s t _ w i d t h ;
v a r s c a l e Y = t h i s . p a r a m s . h e i g h t / t h i s . p a r a m s . d e s t _ h e i g h t ;
/ / m u s t u n f l i p c o n t a i n e r a s p r e v i e w c a n v a s w i l l b e p r e - f l i p p e d
t h i s . u n f l i p ( ) ;
/ / c a l c f i n a l s i z e o f i m a g e
v a r f i n a l _ w i d t h = p a r a m s . c r o p _ w i d t h | | p a r a m s . d e s t _ w i d t h ;
v a r f i n a l _ h e i g h t = p a r a m s . c r o p _ h e i g h t | | p a r a m s . d e s t _ h e i g h t ;
/ / c r e a t e c a n v a s f o r h o l d i n g p r e v i e w
v a r p r e v i e w _ c a n v a s = d o c u m e n t . c r e a t e E l e m e n t ( ' c a n v a s ' ) ;
p r e v i e w _ c a n v a s . w i d t h = f i n a l _ w i d t h ;
p r e v i e w _ c a n v a s . h e i g h t = f i n a l _ h e i g h t ;
v a r p r e v i e w _ c o n t e x t = p r e v i e w _ c a n v a s . g e t C o n t e x t ( ' 2 d ' ) ;
/ / s a v e f o r l a t e r u s e
t h i s . p r e v i e w _ c a n v a s = p r e v i e w _ c a n v a s ;
t h i s . p r e v i e w _ c o n t e x t = p r e v i e w _ c o n t e x t ;
/ / s c a l e f o r p r e v i e w s i z e
i f ( ( s c a l e X ! = 1 . 0 ) | | ( s c a l e Y ! = 1 . 0 ) ) {
p r e v i e w _ c a n v a s . s t y l e . w e b k i t T r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
p r e v i e w _ c a n v a s . s t y l e . m o z T r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
p r e v i e w _ c a n v a s . s t y l e . m s T r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
p r e v i e w _ c a n v a s . s t y l e . o T r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
p r e v i e w _ c a n v a s . s t y l e . t r a n s f o r m O r i g i n = ' 0 p x 0 p x ' ;
p r e v i e w _ c a n v a s . s t y l e . w e b k i t T r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
p r e v i e w _ c a n v a s . s t y l e . m o z T r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
p r e v i e w _ c a n v a s . s t y l e . m s T r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
p r e v i e w _ c a n v a s . s t y l e . o T r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
p r e v i e w _ c a n v a s . s t y l e . t r a n s f o r m = ' s c a l e X ( ' + s c a l e X + ' ) s c a l e Y ( ' + s c a l e Y + ' ) ' ;
}
/ / t a k e s n a p s h o t , b u t f i r e o u r o w n c a l l b a c k
t h i s . s n a p ( f u n c t i o n ( ) {
/ / a d d p r e v i e w i m a g e t o d o m , a d j u s t f o r c r o p
p r e v i e w _ c a n v a s . s t y l e . p o s i t i o n = ' r e l a t i v e ' ;
p r e v i e w _ c a n v a s . s t y l e . l e f t = ' ' + s e l f . c o n t a i n e r . s c r o l l L e f t + ' p x ' ;
p r e v i e w _ c a n v a s . s t y l e . t o p = ' ' + s e l f . c o n t a i n e r . s c r o l l T o p + ' p x ' ;
s e l f . c o n t a i n e r . i n s e r t B e f o r e ( p r e v i e w _ c a n v a s , s e l f . p e g ) ;
s e l f . c o n t a i n e r . s t y l e . o v e r f l o w = ' h i d d e n ' ;
/ / s e t f l a g f o r u s e r c a p t u r e ( u s e p r e v i e w )
s e l f . p r e v i e w _ a c t i v e = t r u e ;
} , p r e v i e w _ c a n v a s ) ;
} ,
u n f r e e z e : f u n c t i o n ( ) {
/ / c a n c e l p r e v i e w a n d r e s u m e l i v e v i d e o f e e d
i f ( t h i s . p r e v i e w _ a c t i v e ) {
/ / r e m o v e p r e v i e w c a n v a s
t h i s . c o n t a i n e r . r e m o v e C h i l d ( t h i s . p r e v i e w _ c a n v a s ) ;
d e l e t e t h i s . p r e v i e w _ c o n t e x t ;
d e l e t e t h i s . p r e v i e w _ c a n v a s ;
/ / u n f l a g
t h i s . p r e v i e w _ a c t i v e = f a l s e ;
/ / r e - f l i p i f w e u n f l i p p e d b e f o r e
t h i s . f l i p ( ) ;
}
} ,
f l i p : f u n c t i o n ( ) {
/ / f l i p c o n t a i n e r h o r i z ( m i r r o r m o d e ) i f d e s i r e d
i f ( t h i s . p a r a m s . f l i p _ h o r i z ) {
v a r s t y = t h i s . c o n t a i n e r . s t y l e ;
s t y . w e b k i t T r a n s f o r m = ' s c a l e X ( - 1 ) ' ;
s t y . m o z T r a n s f o r m = ' s c a l e X ( - 1 ) ' ;
s t y . m s T r a n s f o r m = ' s c a l e X ( - 1 ) ' ;
s t y . o T r a n s f o r m = ' s c a l e X ( - 1 ) ' ;
s t y . t r a n s f o r m = ' s c a l e X ( - 1 ) ' ;
s t y . f i l t e r = ' F l i p H ' ;
s t y . m s F i l t e r = ' F l i p H ' ;
}
} ,
u n f l i p : f u n c t i o n ( ) {
/ / u n f l i p c o n t a i n e r h o r i z ( m i r r o r m o d e ) i f d e s i r e d
i f ( t h i s . p a r a m s . f l i p _ h o r i z ) {
v a r s t y = t h i s . c o n t a i n e r . s t y l e ;
s t y . w e b k i t T r a n s f o r m = ' s c a l e X ( 1 ) ' ;
s t y . m o z T r a n s f o r m = ' s c a l e X ( 1 ) ' ;
s t y . m s T r a n s f o r m = ' s c a l e X ( 1 ) ' ;
s t y . o T r a n s f o r m = ' s c a l e X ( 1 ) ' ;
s t y . t r a n s f o r m = ' s c a l e X ( 1 ) ' ;
s t y . f i l t e r = ' ' ;
s t y . m s F i l t e r = ' ' ;
}
} ,
s a v e P r e v i e w : f u n c t i o n ( u s e r _ c a l l b a c k , u s e r _ c a n v a s ) {
/ / s a v e p r e v i e w f r e e z e a n d f i r e u s e r c a l l b a c k
v a r p a r a m s = t h i s . p a r a m s ;
v a r c a n v a s = t h i s . p r e v i e w _ c a n v a s ;
v a r c o n t e x t = t h i s . p r e v i e w _ c o n t e x t ;
/ / r e n d e r t o u s e r c a n v a s i f d e s i r e d
i f ( u s e r _ c a n v a s ) {
v a r u s e r _ c o n t e x t = u s e r _ c a n v a s . g e t C o n t e x t ( ' 2 d ' ) ;
u s e r _ c o n t e x t . d r a w I m a g e ( c a n v a s , 0 , 0 ) ;
}
/ / f i r e u s e r c a l l b a c k i f d e s i r e d
u s e r _ c a l l b a c k (
u s e r _ c a n v a s ? n u l l : c a n v a s . t o D a t a U R L ( ' i m a g e / ' + p a r a m s . i m a g e _ f o r m a t , p a r a m s . j p e g _ q u a l i t y / 1 0 0 ) ,
c a n v a s ,
c o n t e x t
) ;
/ / r e m o v e p r e v i e w
i f ( t h i s . p a r a m s . u n f r e e z e _ s n a p ) t h i s . u n f r e e z e ( ) ;
} ,
s n a p : f u n c t i o n ( u s e r _ c a l l b a c k , u s e r _ c a n v a s ) {
/ / u s e g l o b a l c a l l b a c k a n d c a n v a s i f n o t d e f i n e d a s p a r a m e t e r
i f ( ! u s e r _ c a l l b a c k ) u s e r _ c a l l b a c k = t h i s . p a r a m s . u s e r _ c a l l b a c k ;
i f ( ! u s e r _ c a n v a s ) u s e r _ c a n v a s = t h i s . p a r a m s . u s e r _ c a n v a s ;
/ / t a k e s n a p s h o t a n d r e t u r n i m a g e d a t a u r i
v a r s e l f = t h i s ;
v a r p a r a m s = t h i s . p a r a m s ;
i f ( ! t h i s . l o a d e d ) r e t u r n t h i s . d i s p a t c h ( ' e r r o r ' , n e w W e b c a m E r r o r ( " W e b c a m i s n o t l o a d e d y e t " ) ) ;
/ / i f ( ! t h i s . l i v e ) r e t u r n t h i s . d i s p a t c h ( ' e r r o r ' , n e w W e b c a m E r r o r ( " W e b c a m i s n o t l i v e y e t " ) ) ;
i f ( ! u s e r _ c a l l b a c k ) r e t u r n t h i s . d i s p a t c h ( ' e r r o r ' , n e w W e b c a m E r r o r ( " P l e a s e p r o v i d e a c a l l b a c k f u n c t i o n o r c a n v a s t o s n a p ( ) " ) ) ;
/ / i f w e h a v e a n a c t i v e p r e v i e w f r e e z e , u s e t h a t
i f ( t h i s . p r e v i e w _ a c t i v e ) {
t h i s . s a v e P r e v i e w ( u s e r _ c a l l b a c k , u s e r _ c a n v a s ) ;
r e t u r n n u l l ;
}
/ / c r e a t e o f f s c r e e n c a n v a s e l e m e n t t o h o l d p i x e l s
v a r c a n v a s = d o c u m e n t . c r e a t e E l e m e n t ( ' c a n v a s ' ) ;
c a n v a s . w i d t h = t h i s . p a r a m s . d e s t _ w i d t h ;
c a n v a s . h e i g h t = t h i s . p a r a m s . d e s t _ h e i g h t ;
v a r c o n t e x t = c a n v a s . g e t C o n t e x t ( ' 2 d ' ) ;
/ / f l i p c a n v a s h o r i z o n t a l l y i f d e s i r e d
i f ( t h i s . p a r a m s . f l i p _ h o r i z ) {
c o n t e x t . t r a n s l a t e ( p a r a m s . d e s t _ w i d t h , 0 ) ;
c o n t e x t . s c a l e ( - 1 , 1 ) ;
}
/ / c r e a t e i n l i n e f u n c t i o n , c a l l e d a f t e r i m a g e l o a d ( f l a s h ) o r i m m e d i a t e l y ( n a t i v e )
v a r f u n c = f u n c t i o n ( ) {
/ / r e n d e r i m a g e i f n e e d e d ( f l a s h )
i f ( t h i s . s r c & & t h i s . w i d t h & & t h i s . h e i g h t ) {
c o n t e x t . d r a w I m a g e ( t h i s , 0 , 0 , p a r a m s . d e s t _ w i d t h , p a r a m s . d e s t _ h e i g h t ) ;
}
/ / c r o p i f d e s i r e d
i f ( p a r a m s . c r o p _ w i d t h & & p a r a m s . c r o p _ h e i g h t ) {
v a r c r o p _ c a n v a s = d o c u m e n t . c r e a t e E l e m e n t ( ' c a n v a s ' ) ;
c r o p _ c a n v a s . w i d t h = p a r a m s . c r o p _ w i d t h ;
c r o p _ c a n v a s . h e i g h t = p a r a m s . c r o p _ h e i g h t ;
v a r c r o p _ c o n t e x t = c r o p _ c a n v a s . g e t C o n t e x t ( ' 2 d ' ) ;
c r o p _ c o n t e x t . d r a w I m a g e ( c a n v a s ,
M a t h . f l o o r ( ( p a r a m s . d e s t _ w i d t h / 2 ) - ( p a r a m s . c r o p _ w i d t h / 2 ) ) ,
M a t h . f l o o r ( ( p a r a m s . d e s t _ h e i g h t / 2 ) - ( p a r a m s . c r o p _ h e i g h t / 2 ) ) ,
p a r a m s . c r o p _ w i d t h ,
p a r a m s . c r o p _ h e i g h t ,
0 ,
0 ,
p a r a m s . c r o p _ w i d t h ,
p a r a m s . c r o p _ h e i g h t
) ;
/ / s w a p c a n v a s e s
c o n t e x t = c r o p _ c o n t e x t ;
c a n v a s = c r o p _ c a n v a s ;
}
/ / r e n d e r t o u s e r c a n v a s i f d e s i r e d
i f ( u s e r _ c a n v a s ) {
v a r u s e r _ c o n t e x t = u s e r _ c a n v a s . g e t C o n t e x t ( ' 2 d ' ) ;
u s e r _ c o n t e x t . d r a w I m a g e ( c a n v a s , 0 , 0 ) ;
}
/ / f i r e u s e r c a l l b a c k i f d e s i r e d
u s e r _ c a l l b a c k (
u s e r _ c a n v a s ? n u l l : c a n v a s . t o D a t a U R L ( ' i m a g e / ' + p a r a m s . i m a g e _ f o r m a t , p a r a m s . j p e g _ q u a l i t y / 1 0 0 ) ,
c a n v a s ,
c o n t e x t
) ;
} ;
/ / g r a b i m a g e f r a m e f r o m u s e r M e d i a o r f l a s h m o v i e
i f ( t h i s . u s e r M e d i a ) {
/ / n a t i v e i m p l e m e n t a t i o n
c o n t e x t . d r a w I m a g e ( t h i s . v i d e o , 0 , 0 , t h i s . p a r a m s . d e s t _ w i d t h , t h i s . p a r a m s . d e s t _ h e i g h t ) ;
/ / f i r e c a l l b a c k r i g h t a w a y
f u n c ( ) ;
}
e l s e i f ( t h i s . i O S ) {
v a r d i v = d o c u m e n t . g e t E l e m e n t B y I d ( t h i s . c o n t a i n e r . i d + ' - i o s _ d i v ' ) ;
v a r i m g = d o c u m e n t . g e t E l e m e n t B y I d ( t h i s . c o n t a i n e r . i d + ' - i o s _ i m g ' ) ;
v a r i n p u t = d o c u m e n t . g e t E l e m e n t B y I d ( t h i s . c o n t a i n e r . i d + ' - i o s _ i n p u t ' ) ;
/ / f u n c t i o n f o r h a n d l e s n a p s h o t e v e n t ( c a l l u s e r _ c a l l b a c k a n d r e s e t t h e i n t e r f a c e )
i F u n c = f u n c t i o n ( e v e n t ) {
f u n c . c a l l ( i m g ) ;
i m g . r e m o v e E v e n t L i s t e n e r ( ' l o a d ' , i F u n c ) ;
d i v . s t y l e . b a c k g r o u n d I m a g e = ' n o n e ' ;
i m g . r e m o v e A t t r i b u t e ( ' s r c ' ) ;
i n p u t . v a l u e = n u l l ;
} ;
i f ( ! i n p u t . v a l u e ) {
/ / N o i m a g e s e l e c t e d y e t , a c t i v a t e i n p u t f i e l d
i m g . a d d E v e n t L i s t e n e r ( ' l o a d ' , i F u n c ) ;
i n p u t . s t y l e . d i s p l a y = ' b l o c k ' ;
i n p u t . f o c u s ( ) ;
i n p u t . c l i c k ( ) ;
i n p u t . s t y l e . d i s p l a y = ' n o n e ' ;
} e l s e {
/ / I m a g e a l r e a d y s e l e c t e d
i F u n c ( n u l l ) ;
}
}
e l s e {
/ / f l a s h f a l l b a c k
v a r r a w _ d a t a = t h i s . g e t M o v i e ( ) . _ s n a p ( ) ;
/ / r e n d e r t o i m a g e , f i r e c a l l b a c k w h e n c o m p l e t e
v a r i m g = n e w I m a g e ( ) ;
i m g . o n l o a d = f u n c ;
i m g . s r c = ' d a t a : i m a g e / ' + t h i s . p a r a m s . i m a g e _ f o r m a t + ' ; b a s e 6 4 , ' + r a w _ d a t a ;
}
r e t u r n n u l l ;
} ,
c o n f i g u r e : f u n c t i o n ( p a n e l ) {
/ / o p e n f l a s h c o n f i g u r a t i o n p a n e l - - s p e c i f y t a b n a m e :
/ / " c a m e r a " , " p r i v a c y " , " d e f a u l t " , " l o c a l S t o r a g e " , " m i c r o p h o n e " , " s e t t i n g s M a n a g e r "
i f ( ! p a n e l ) p a n e l = " c a m e r a " ;
t h i s . g e t M o v i e ( ) . _ c o n f i g u r e ( p a n e l ) ;
} ,
f l a s h N o t i f y : f u n c t i o n ( t y p e , m s g ) {
/ / r e c e i v e n o t i f i c a t i o n f r o m f l a s h a b o u t e v e n t
s w i t c h ( t y p e ) {
c a s e ' f l a s h L o a d C o m p l e t e ' :
/ / m o v i e l o a d e d s u c c e s s f u l l y
t h i s . l o a d e d = t r u e ;
t h i s . d i s p a t c h ( ' l o a d ' ) ;
b r e a k ;
c a s e ' c a m e r a L i v e ' :
/ / c a m e r a i s l i v e a n d r e a d y t o s n a p
t h i s . l i v e = t r u e ;
t h i s . d i s p a t c h ( ' l i v e ' ) ;
b r e a k ;
c a s e ' e r r o r ' :
/ / F l a s h e r r o r
t h i s . d i s p a t c h ( ' e r r o r ' , n e w F l a s h E r r o r ( m s g ) ) ;
b r e a k ;
d e f a u l t :
/ / c a t c h - a l l e v e n t , j u s t i n c a s e
/ / c o n s o l e . l o g ( " w e b c a m f l a s h _ n o t i f y : " + t y p e + " : " + m s g ) ;
b r e a k ;
}
} ,
b 6 4 T o U i n t 6 : f u n c t i o n ( n C h r ) {
/ / c o n v e r t b a s e 6 4 e n c o d e d c h a r a c t e r t o 6 - b i t i n t e g e r
/ / f r o m : h t t p s : / / d e v e l o p e r . m o z i l l a . o r g / e n - U S / d o c s / W e b / J a v a S c r i p t / B a s e 6 4 _ e n c o d i n g _ a n d _ d e c o d i n g
r e t u r n n C h r > 6 4 & & n C h r < 9 1 ? n C h r - 6 5
: n C h r > 9 6 & & n C h r < 1 2 3 ? n C h r - 7 1
: n C h r > 4 7 & & n C h r < 5 8 ? n C h r + 4
: n C h r = = = 4 3 ? 6 2 : n C h r = = = 4 7 ? 6 3 : 0 ;
} ,
b a s e 6 4 D e c T o A r r : f u n c t i o n ( s B a s e 6 4 , n B l o c k s S i z e ) {
/ / c o n v e r t b a s e 6 4 e n c o d e d s t r i n g t o U i n t a r r a y
/ / f r o m : h t t p s : / / d e v e l o p e r . m o z i l l a . o r g / e n - U S / d o c s / W e b / J a v a S c r i p t / B a s e 6 4 _ e n c o d i n g _ a n d _ d e c o d i n g
v a r s B 6 4 E n c = s B a s e 6 4 . r e p l a c e ( / [ ^ A - Z a - z 0 - 9 \ + \ / ] / g , " " ) , n I n L e n = s B 6 4 E n c . l e n g t h ,
n O u t L e n = n B l o c k s S i z e ? M a t h . c e i l ( ( n I n L e n * 3 + 1 > > 2 ) / n B l o c k s S i z e ) * n B l o c k s S i z e : n I n L e n * 3 + 1 > > 2 ,
t a B y t e s = n e w U i n t 8 A r r a y ( n O u t L e n ) ;
f o r ( v a r n M o d 3 , n M o d 4 , n U i n t 2 4 = 0 , n O u t I d x = 0 , n I n I d x = 0 ; n I n I d x < n I n L e n ; n I n I d x + + ) {
n M o d 4 = n I n I d x & 3 ;
n U i n t 2 4 | = t h i s . b 6 4 T o U i n t 6 ( s B 6 4 E n c . c h a r C o d e A t ( n I n I d x ) ) < < 1 8 - 6 * n M o d 4 ;
i f ( n M o d 4 = = = 3 | | n I n L e n - n I n I d x = = = 1 ) {
f o r ( n M o d 3 = 0 ; n M o d 3 < 3 & & n O u t I d x < n O u t L e n ; n M o d 3 + + , n O u t I d x + + ) {
t a B y t e s [ n O u t I d x ] = n U i n t 2 4 > > > ( 1 6 > > > n M o d 3 & 2 4 ) & 2 5 5 ;
}
n U i n t 2 4 = 0 ;
}
}
r e t u r n t a B y t e s ;
} ,
u p l o a d : f u n c t i o n ( i m a g e _ d a t a _ u r i , t a r g e t _ u r l , c a l l b a c k ) {
/ / s u b m i t i m a g e d a t a t o s e r v e r u s i n g b i n a r y A J A X
v a r f o r m _ e l e m _ n a m e = t h i s . p a r a m s . u p l o a d _ n a m e | | ' w e b c a m ' ;
/ / d e t e c t i m a g e f o r m a t f r o m w i t h i n i m a g e _ d a t a _ u r i
v a r i m a g e _ f m t = ' ' ;
i f ( i m a g e _ d a t a _ u r i . m a t c h ( / ^ d a t a \ : i m a g e \ / ( \ w + ) / ) )
i m a g e _ f m t = R e g E x p . $ 1 ;
e l s e
t h r o w " C a n n o t l o c a t e i m a g e f o r m a t i n D a t a U R I " ;
/ / e x t r a c t r a w b a s e 6 4 d a t a f r o m D a t a U R I
v a r r a w _ i m a g e _ d a t a = i m a g e _ d a t a _ u r i . r e p l a c e ( / ^ d a t a \ : i m a g e \ / \ w + \ ; b a s e 6 4 \ , / , ' ' ) ;
/ / c o n t r u c t u s e A J A X o b j e c t
v a r h t t p = n e w X M L H t t p R e q u e s t ( ) ;
h t t p . o p e n ( " P O S T " , t a r g e t _ u r l , t r u e ) ;
/ / s e t u p p r o g r e s s e v e n t s
i f ( h t t p . u p l o a d & & h t t p . u p l o a d . a d d E v e n t L i s t e n e r ) {
h t t p . u p l o a d . a d d E v e n t L i s t e n e r ( ' p r o g r e s s ' , f u n c t i o n ( e ) {
i f ( e . l e n g t h C o m p u t a b l e ) {
v a r p r o g r e s s = e . l o a d e d / e . t o t a l ;
W e b c a m . d i s p a t c h ( ' u p l o a d P r o g r e s s ' , p r o g r e s s , e ) ;
}
} , f a l s e ) ;
}
/ / c o m p l e t i o n h a n d l e r
v a r s e l f = t h i s ;
h t t p . o n l o a d = f u n c t i o n ( ) {
i f ( c a l l b a c k ) c a l l b a c k . a p p l y ( s e l f , [ h t t p . s t a t u s , h t t p . r e s p o n s e T e x t , h t t p . s t a t u s T e x t ] ) ;
W e b c a m . d i s p a t c h ( ' u p l o a d C o m p l e t e ' , h t t p . s t a t u s , h t t p . r e s p o n s e T e x t , h t t p . s t a t u s T e x t ) ;
} ;
/ / c r e a t e a b l o b a n d d e c o d e o u r b a s e 6 4 t o b i n a r y
v a r b l o b = n e w B l o b ( [ t h i s . b a s e 6 4 D e c T o A r r ( r a w _ i m a g e _ d a t a ) ] , { t y p e : ' i m a g e / ' + i m a g e _ f m t } ) ;
/ / s t u f f i n t o a f o r m , s o s e r v e r s c a n e a s i l y r e c e i v e i t a s a s t a n d a r d f i l e u p l o a d
v a r f o r m = n e w F o r m D a t a ( ) ;
f o r m . a p p e n d ( f o r m _ e l e m _ n a m e , b l o b , f o r m _ e l e m _ n a m e + " . " + i m a g e _ f m t . r e p l a c e ( / e / , ' ' ) ) ;
/ / s e n d d a t a t o s e r v e r
h t t p . s e n d ( f o r m ) ;
}
} ;
W e b c a m . i n i t ( ) ;
i f ( t y p e o f d e f i n e = = = ' f u n c t i o n ' & & d e f i n e . a m d ) {
d e f i n e ( f u n c t i o n ( ) { r e t u r n W e b c a m ; } ) ;
}
e l s e i f ( t y p e o f m o d u l e = = = ' o b j e c t ' & & m o d u l e . e x p o r t s ) {
m o d u l e . e x p o r t s = W e b c a m ;
}
e l s e {
w i n d o w . W e b c a m = W e b c a m ;
}
} ( w i n d o w ) ) ;
PDF.co Web API: the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.