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New option for livestream #89

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merged 6 commits into from
Feb 15, 2016
Merged

New option for livestream #89

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3f12bfb
adding grunt-cli to dev-dependencies (grunt was not recognized as a c…
davincho Feb 7, 2016
893a3bc
adding new option `target` for 'livestream'. We can use our own eleme…
davincho Feb 7, 2016
3c85675
actual changes have been ignored unintentionally
davincho Feb 7, 2016
944d92c
code changes according to PR line notes
davincho Feb 10, 2016
6338aad
Explain target option for livestream
davincho Feb 10, 2016
a16d398
fixing typo
davincho Feb 10, 2016
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6 changes: 5 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -120,11 +120,15 @@ may be the `inputStream.type` is set to `LiveStream`, but the browser does
not support this API, or simply if the user denies the permission to use the
camera.

If you do not specify a target, QuaggaJS would look for an element that matches the CSS selector `#interactive.viewport` (for backwards compatibility).
`target` can be a string (CSS selector matching one of your DOM node) or a DOM node.

```javascript
Quagga.init({
inputStream : {
name : "Live",
type : "LiveStream"
type : "LiveStream",
target: document.querySelector('#yourElement') // Or '#yourElement' (optional)
},
decoder : {
readers : ["code_128_reader"]
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29 changes: 19 additions & 10 deletions dist/quagga.js
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6 changes: 3 additions & 3 deletions dist/quagga.min.js
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29 changes: 19 additions & 10 deletions lib/quagga.js
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4 changes: 2 additions & 2 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
"chai": "^3.4.1",
"core-js": "^1.2.1",
"grunt": "^0.4.5",
"grunt-cli": "0.1.13",
"grunt-contrib-nodeunit": "^0.4.1",
"grunt-karma": "^0.12.1",
"isparta-loader": "^1.0.0",
Expand All @@ -21,7 +22,6 @@
"karma-coverage": "^0.5.2",
"karma-mocha": "~0.2.0",
"karma-phantomjs-launcher": "^0.2.1",
"karma-sinon-chai": "^1.1.0",
"karma-sinon": "^1.0.4",
"karma-sinon-chai": "~0.2.0",
"karma-source-map-support": "^1.1.0",
Expand Down Expand Up @@ -63,7 +63,7 @@
],
"author": "Christoph Oberhofer <[email protected]>",
"license": "MIT",
"engines":{
"engines": {
"node": ">= 4.0"
},
"dependencies": {
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18 changes: 15 additions & 3 deletions src/quagga.js
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ function initInputStream(cb) {
} else if (_config.inputStream.type === "ImageStream") {
_inputStream = InputStream.createImageStream();
} else if (_config.inputStream.type === "LiveStream") {
var $viewport = document.querySelector("#interactive.viewport");
var $viewport = getViewPort();
if ($viewport) {
video = $viewport.querySelector("video");
if (!video) {
Expand All @@ -71,9 +71,21 @@ function initInputStream(cb) {
_inputStream.addEventListener("canrecord", canRecord.bind(undefined, cb));
}

function getViewPort() {
var target = _config.inputStream.target;
// Check if target is already a DOM element
if(target && target.nodeName && target.nodeType === 1) {
return target;
} else {
// Use '#interactive.viewport' as a fallback selector (backwards compatibility)
var selector = typeof target === 'string' ? target : '#interactive.viewport';
return document.querySelector(selector);
}
}

function canRecord(cb) {
BarcodeLocator.checkImageConstraints(_inputStream, _config.locator);
initCanvas();
initCanvas(_config);
_framegrabber = FrameGrabber.create(_inputStream, _canvasContainer.dom.image);

if (_config.numOfWorkers > 0) {
Expand All @@ -94,7 +106,7 @@ function ready(cb){

function initCanvas() {
if (typeof document !== "undefined") {
var $viewport = document.querySelector("#interactive.viewport");
var $viewport = getViewPort();
_canvasContainer.dom.image = document.querySelector("canvas.imgBuffer");
if (!_canvasContainer.dom.image) {
_canvasContainer.dom.image = document.createElement("canvas");
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