Initial version for node.js
Christoph Oberhofer
10 years ago
parent
89da5cc4e7
commit
a042422515
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var Quagga = require('../lib/quagga');
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Quagga.decodeSingle({
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src: "../test/fixtures/code_128/image-001.jpg",
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numOfWorkers: 0,
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inputStream: {
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size: 640
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}
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}, function(result) {
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if(result.codeResult) {
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console.log("result", result.codeResult.code);
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} else {
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console.log("not detected");
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}
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});
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/* jshint undef: true, unused: true, browser:true, devel: true */
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/* global define */
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define(["cv_utils"], function(CVUtils) {
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"use strict";
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var FrameGrabber = {};
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FrameGrabber.create = function(inputStream) {
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var _that = {},
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_streamConfig = inputStream.getConfig(),
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_video_size = CVUtils.imageRef(inputStream.getRealWidth(), inputStream.getRealHeight()),
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_size =_streamConfig.size ? CVUtils.imageRef(inputStream.getWidth(), inputStream.getHeight()) : _video_size,
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_sx = 0,
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_sy = 0,
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_dx = 0,
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_dy = 0,
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_sWidth,
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_dWidth,
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_sHeight,
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_dHeight,
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_canvas = null,
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_ctx = null,
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_data = null;
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_sWidth = _video_size.x;
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_dWidth = _size.x;
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_sHeight = _video_size.y;
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_dHeight = _size.y;
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_data = new Uint8Array(_size.x * _size.y);
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/**
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* Uses the given array as frame-buffer
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*/
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_that.attachData = function(data) {
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_data = data;
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};
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/**
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* Returns the used frame-buffer
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*/
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_that.getData = function() {
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return _data;
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};
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/**
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* Fetches a frame from the input-stream and puts into the frame-buffer.
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* The image-data is converted to gray-scale and then half-sampled if configured.
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*/
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_that.grab = function() {
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var doHalfSample = _streamConfig.halfSample,
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frame = inputStream.getFrame();
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if (frame) {
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if(doHalfSample){
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CVUtils.grayAndHalfSampleFromCanvasData(frame.data, _size, _data);
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} else {
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CVUtils.computeGray(frame.data, _data);
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}
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return true;
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} else {
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return false;
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}
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};
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_that.getSize = function() {
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return _size;
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};
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return _that;
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};
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return (FrameGrabber);
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});
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@ -0,0 +1,138 @@
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/* jshint undef: true, unused: true, browser:true, devel: true */
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/* global define */
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define(function() {
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"use strict";
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var GetPixels = require("get-pixels");
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var InputStream = {};
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InputStream.createImageStream = function() {
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var that = {};
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var _config = null;
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var width = 0,
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height = 0,
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frameIdx = 0,
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paused = true,
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loaded = false,
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frame = null,
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baseUrl,
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ended = false,
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size,
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calculatedWidth,
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calculatedHeight,
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_eventNames = ['canrecord', 'ended'],
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_eventHandlers = {};
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function loadImages() {
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loaded = false;
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GetPixels(baseUrl, function(err, pixels) {
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if (err) {
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console.log(err);
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exit(1);
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}
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loaded = true;
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console.log(pixels.shape);
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frame = pixels;
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width = pixels.shape[0];
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height = pixels.shape[1];
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calculatedWidth = _config.size ? width/height > 1 ? _config.size : Math.floor((width/height) * _config.size) : width;
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calculatedHeight = _config.size ? width/height > 1 ? Math.floor((height/width) * _config.size) : _config.size : height;
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setTimeout(function() {
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publishEvent("canrecord", []);
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}, 0);
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});
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}
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function publishEvent(eventName, args) {
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var j,
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handlers = _eventHandlers[eventName];
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if (handlers && handlers.length > 0) {
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for ( j = 0; j < handlers.length; j++) {
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handlers[j].apply(that, args);
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}
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}
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}
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that.trigger = publishEvent;
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that.getWidth = function() {
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return calculatedWidth;
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};
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that.getHeight = function() {
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return calculatedHeight;
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};
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that.setWidth = function(width) {
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calculatedWidth = width;
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};
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that.setHeight = function(height) {
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calculatedHeight = height;
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};
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that.getRealWidth = function() {
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return width;
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};
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that.getRealHeight = function() {
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return height;
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};
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that.setInputStream = function(stream) {
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_config = stream;
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baseUrl = _config.src;
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size = 1;
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loadImages();
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};
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that.ended = function() {
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return ended;
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};
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that.setAttribute = function() {};
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that.getConfig = function() {
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return _config;
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};
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that.pause = function() {
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paused = true;
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};
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that.play = function() {
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paused = false;
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};
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that.setCurrentTime = function(time) {
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frameIdx = time;
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};
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that.addEventListener = function(event, f) {
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if (_eventNames.indexOf(event) !== -1) {
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if (!_eventHandlers[event]) {
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_eventHandlers[event] = [];
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}
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_eventHandlers[event].push(f);
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}
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};
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that.getFrame = function() {
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if (!loaded){
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return null;
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}
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return frame;
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};
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return that;
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};
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return (InputStream);
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});
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@ -0,0 +1,12 @@
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var requirejs = require('requirejs');
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requirejs.config({
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"baseUrl" : "../src",
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"paths" : {
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"typedefs" : "typedefs",
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"input_stream": "../lib/input_stream",
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"frame_grabber": "../lib/frame_grabber"
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}
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});
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module.exports = requirejs('quagga');
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