Updated version to 0.6.0

examples/file_input.html

@@ -7,12 +7,15 @@ showInMenu: false
 
 <section id="container" class="container">
     <h3>Working with file-input</h3>
-    <p>This example let's you select an image from your local filesystem. QuaggaJS then tries to decode the barcode using
-        the preferred method (<strong>Code128</strong>, <strong>EAN
-        </strong>, <strong>Code 39</strong> or <strong>Codabar</strong>)
-                There is no server interaction needed as the file is simply
-                accessed through the <a href="http://www.w3.org/TR/file-upload/">File API</a>.</p>
-    <p>This also works great on a wide range of mobile-phones where the camera access through <code>getUserMedia</code> is still very limited.</p>
+    <p>This example let's you select an image from your local filesystem.
+        There is no server interaction needed as the file is
+        simply accessed through the
+        <a href="http://www.w3.org/TR/file-upload/">File API</a>.
+    <p>This also works great on a wide range of mobile-phones where the
+        camera access through <code>getUserMedia</code> is still very
+        limited. </p>
+    <p>If the default configuration does not suit your use-case, you can
+        adjust various parameters of the localization and decoding process.</p>
   <div class="controls">
       <fieldset class="input-group">
           <input type="file" accept="image/*;capture=camera"/>
@@ -25,6 +28,9 @@ showInMenu: false
                   <option value="code_128" selected="selected">Code 128</option>
                   <option value="code_39">Code 39</option>
                   <option value="ean">EAN</option>
+                  <option value="ean_8">EAN-8</option>
+                  <option value="upc">UPC</option>
+                  <option value="upc_e">UPC-E</option>
                   <option value="codabar">Codabar</option>
               </select>
           </label>

examples/js/quagga.js

@@ -1240,23 +1240,50 @@ define(
             throw BarcodeReader.PatternNotFoundException;
         };
 
-        EANReader.prototype._decode = function() {
-            var startInfo,
-                self = this,
-                code = null, 
-                result = [],
-                i,
-                codeFrequency = 0x0,
-                decodedCodes = [];
+        EANReader.prototype._findStart = function() {
+            var self = this,
+                leadingWhitespaceStart,
+                offset = self._nextSet(self._row),
+                startInfo;
 
-            try {
-                startInfo = self._findPattern(self.START_PATTERN);
-                code = {
-                    code : startInfo.code,
-                    start : startInfo.start,
-                    end : startInfo.end
+            while(!startInfo) {
+                startInfo = self._findPattern(self.START_PATTERN, offset);
+                leadingWhitespaceStart = startInfo.start - (startInfo.end - startInfo.start);
+                if (leadingWhitespaceStart >= 0) {
+                    if (self._matchRange(leadingWhitespaceStart, startInfo.start, 0)) {
+                        return startInfo;
+                    }
+                }
+                offset = startInfo.end;
+                startInfo = null;
+            }
         };
-                decodedCodes.push(code);
+
+        EANReader.prototype._verifyTrailingWhitespace = function(endInfo) {
+            var self = this,
+                trailingWhitespaceEnd;
+
+            trailingWhitespaceEnd = endInfo.end + (endInfo.end - endInfo.start);
+            if (trailingWhitespaceEnd < self._row.length) {
+                if (self._matchRange(endInfo.end, trailingWhitespaceEnd, 0)) {
+                    return endInfo;
+                }
+            }
+            return null;
+        };
+
+        EANReader.prototype._findEnd = function(offset, isWhite) {
+            var self = this,
+                endInfo = self._findPattern(self.STOP_PATTERN, offset, isWhite, false);
+
+            return self._verifyTrailingWhitespace(endInfo);
+        };
+
+        EANReader.prototype._decodePayload = function(code, result, decodedCodes) {
+            var i,
+                self = this,
+                codeFrequency = 0x0;
+
             for ( i = 0; i < 6; i++) {
                 code = self._decodeCode(code.end);
                 if (code.code >= self.CODE_G_START) {
@@ -1276,7 +1303,7 @@ define(
                 }
             }
 
-                code = self._findPattern(self.MIDDLE_PATTERN, code.end, true);
+            code = self._findPattern(self.MIDDLE_PATTERN, code.end, true, false);
             if (code === null) {
                 return null;
             }
@@ -1288,7 +1315,30 @@ define(
                 result.push(code.code);
             }
 
-                code = self._findPattern(self.STOP_PATTERN, code.end);
+            return code;
+        };
+
+        EANReader.prototype._decode = function() {
+            var startInfo,
+                self = this,
+                code = null, 
+                result = [],
+                decodedCodes = [];
+
+            try {
+                startInfo = self._findStart();
+                code = {
+                    code : startInfo.code,
+                    start : startInfo.start,
+                    end : startInfo.end
+                };
+                decodedCodes.push(code);
+                code = self._decodePayload(code, result, decodedCodes);
+                code = self._findEnd(code.end, false);
+                if (!code){
+                    return null;
+                }
+
                 decodedCodes.push(code);
 
                 // Checksum
@@ -1459,6 +1509,17 @@ define('input_stream',["image_loader"], function(ImageLoader) {
             }
         };
 
+        that.clearEventHandlers = function() {
+            _eventNames.forEach(function(eventName) {
+                var handlers = _eventHandlers[eventName];
+                if (handlers && handlers.length > 0) {
+                    handlers.forEach(function(handler) {
+                        video.removeEventListener(eventName, handler);
+                    });
+                }
+            });
+        };
+
         that.trigger = function(eventName, args) {
             var j,
                 handlers = _eventHandlers[eventName];
@@ -6384,23 +6445,23 @@ define('bresenham',[],function() {
             extrema = [],
             currentDir,
             dir,
-            threshold = (max - min) / 8,
+            threshold = (max - min) / 12,
             rThreshold = -threshold,
             i,
             j;
 
         // 1. find extrema
-        currentDir = line[0] > center ? Slope.DIR.DOWN : Slope.DIR.UP;
+        currentDir = line[0] > center ? Slope.DIR.UP : Slope.DIR.DOWN;
         extrema.push({
             pos : 0,
             val : line[0]
         });
         for ( i = 0; i < line.length - 1; i++) {
             slope = (line[i + 1] - line[i]);
-            if (slope < rThreshold) {
-                dir = Slope.DIR.UP;
-            } else if (slope > threshold) {
+            if (slope < rThreshold && line[i + 1] < (center*1.5)) {
                 dir = Slope.DIR.DOWN;
+            } else if (slope > threshold && line[i + 1] > (center*0.5)) {
+                dir = Slope.DIR.UP;
             } else {
                 dir = currentDir;
             }
@@ -6995,14 +7056,221 @@ define(
 /* jshint undef: true, unused: true, browser:true, devel: true */
 /* global define */
 
-define('barcode_decoder',["bresenham", "image_debug", 'code_128_reader', 'ean_reader', 'code_39_reader', 'codabar_reader'], function(Bresenham, ImageDebug, Code128Reader, EANReader, Code39Reader, CodabarReader) {
+define(
+    'upc_reader',[
+        "./ean_reader"
+    ],
+    function(EANReader) {
+        
+
+        function UPCReader() {
+            EANReader.call(this);
+        }
+
+        UPCReader.prototype = Object.create(EANReader.prototype);
+        UPCReader.prototype.constructor = UPCReader;
+
+        UPCReader.prototype._decode = function() {
+            var result = EANReader.prototype._decode.call(this);
+
+            if (result && result.code && result.code.length === 13 && result.code.charAt(0) === "0") {
+
+                result.code = result.code.substring(1);
+                return result;
+            }
+            return null;
+        };
+
+        return (UPCReader);
+    }
+);
+/* jshint undef: true, unused: true, browser:true, devel: true */
+/* global define */
+
+define(
+    'ean_8_reader',[
+        "./ean_reader"
+    ],
+    function(EANReader) {
+        
+
+        function EAN8Reader() {
+            EANReader.call(this);
+        }
+
+        EAN8Reader.prototype = Object.create(EANReader.prototype);
+        EAN8Reader.prototype.constructor = EAN8Reader;
+
+        EAN8Reader.prototype._decodePayload = function(code, result, decodedCodes) {
+            var i,
+                self = this;
+
+            for ( i = 0; i < 4; i++) {
+                code = self._decodeCode(code.end);
+                result.push(code.code);
+                decodedCodes.push(code);
+            }
+
+            code = self._findPattern(self.MIDDLE_PATTERN, code.end, true);
+            if (code === null) {
+                return null;
+            }
+            decodedCodes.push(code);
+
+            for ( i = 0; i < 4; i++) {
+                code = self._decodeCode(code.end, self.CODE_G_START);
+                decodedCodes.push(code);
+                result.push(code.code);
+            }
+
+            return code;
+        };
+
+        return (EAN8Reader);
+    }
+);
+/* jshint undef: true, unused: true, browser:true, devel: true */
+/* global define */
+
+define(
+    'upc_e_reader',[
+        "./ean_reader"
+    ],
+    function(EANReader) {
+        
+
+        function UPCEReader() {
+            EANReader.call(this);
+        }
+
+        var properties = {
+            CODE_FREQUENCY : {value: [
+                [ 56, 52, 50, 49, 44, 38, 35, 42, 41, 37 ],
+                [7, 11, 13, 14, 19, 25, 28, 21, 22, 26]]},
+            STOP_PATTERN: { value: [1 / 6 * 7, 1 / 6 * 7, 1 / 6 * 7, 1 / 6 * 7, 1 / 6 * 7, 1 / 6 * 7]}
+        };
+
+        UPCEReader.prototype = Object.create(EANReader.prototype, properties);
+        UPCEReader.prototype.constructor = UPCEReader;
+
+        UPCEReader.prototype._decodePayload = function(code, result, decodedCodes) {
+            var i,
+                self = this,
+                codeFrequency = 0x0;
+
+            for ( i = 0; i < 6; i++) {
+                code = self._decodeCode(code.end);
+                if (code.code >= self.CODE_G_START) {
+                    code.code = code.code - self.CODE_G_START;
+                    codeFrequency |= 1 << (5 - i);
+                } else {
+                    codeFrequency |= 0 << (5 - i);
+                }
+                result.push(code.code);
+                decodedCodes.push(code);
+            }
+            self._determineParity(codeFrequency, result);
+
+            return code;
+        };
+
+        UPCEReader.prototype._determineParity = function(codeFrequency, result) {
+            var self =this,
+                i,
+                nrSystem;
+
+            for (nrSystem = 0; nrSystem < self.CODE_FREQUENCY.length; nrSystem++){
+                for ( i = 0; i < self.CODE_FREQUENCY[nrSystem].length; i++) {
+                    if (codeFrequency === self.CODE_FREQUENCY[nrSystem][i]) {
+                        result.unshift(nrSystem);
+                        result.push(i);
+                        return;
+                    }
+                }
+            }
+        };
+
+        UPCEReader.prototype._convertToUPCA = function(result) {
+            var upca = [result[0]],
+                lastDigit = result[result.length - 2];
+
+            if (lastDigit <= 2) {
+                upca = upca.concat(result.slice(1, 3))
+                    .concat([lastDigit, 0, 0, 0, 0])
+                    .concat(result.slice(3, 6));
+            } else if (lastDigit === 3) {
+                upca = upca.concat(result.slice(1, 4))
+                    .concat([0 ,0, 0, 0, 0])
+                    .concat(result.slice(4,6));
+            } else if (lastDigit === 4) {
+                upca = upca.concat(result.slice(1, 5))
+                    .concat([0, 0, 0, 0, 0, result[5]]);
+            } else {
+                upca = upca.concat(result.slice(1, 6))
+                    .concat([0, 0, 0, 0, lastDigit]);
+            }
+
+            upca.push(result[result.length - 1]);
+            return upca;
+        };
+
+        UPCEReader.prototype._checksum = function(result) {
+            return EANReader.prototype._checksum.call(this, this._convertToUPCA(result));
+        };
+
+        UPCEReader.prototype._findEnd = function(offset, isWhite) {
+            isWhite = true;
+            return EANReader.prototype._findEnd.call(this, offset, isWhite);
+        };
+
+        UPCEReader.prototype._verifyTrailingWhitespace = function(endInfo) {
+            var self = this,
+                trailingWhitespaceEnd;
+
+            trailingWhitespaceEnd = endInfo.end + ((endInfo.end - endInfo.start)/2);
+            if (trailingWhitespaceEnd < self._row.length) {
+                if (self._matchRange(endInfo.end, trailingWhitespaceEnd, 0)) {
+                    return endInfo;
+                }
+            }
+        };
+
+        return (UPCEReader);
+    }
+);
+/* jshint undef: true, unused: true, browser:true, devel: true */
+/* global define */
+
+define('barcode_decoder',[
+    "bresenham",
+    "image_debug",
+    'code_128_reader',
+    'ean_reader',
+    'code_39_reader',
+    'codabar_reader',
+    'upc_reader',
+    'ean_8_reader',
+    'upc_e_reader'
+], function(
+    Bresenham,
+    ImageDebug,
+    Code128Reader,
+    EANReader,
+    Code39Reader,
+    CodabarReader,
+    UPCReader,
+    EAN8Reader,
+    UPCEReader) {
     
     
     var readers = {
         code_128_reader: Code128Reader,
         ean_reader: EANReader,
+        ean_8_reader: EAN8Reader,
         code_39_reader: Code39Reader,
-        codabar_reader: CodabarReader
+        codabar_reader: CodabarReader,
+        upc_reader: UPCReader,
+        upc_e_reader: UPCEReader
     };
     var BarcodeDecoder = {
         create : function(config, inputImageWrapper) {
@@ -7090,18 +7358,25 @@ define('barcode_decoder',["bresenham", "image_debug", 'code_128_reader', 'ean_re
              * @param {Number} angle 
              */
             function getExtendedLine(line, angle, ext) {
+                function extendLine(amount) {
                     var extension = {
-                        y : ext * Math.sin(angle),
-                        x : ext * Math.cos(angle)
+                        y : amount * Math.sin(angle),
+                        x : amount * Math.cos(angle)
                     };
 
                     line[0].y -= extension.y;
                     line[0].x -= extension.x;
                     line[1].y += extension.y;
                     line[1].x += extension.x;
+                }
 
                 // check if inside image
-                if (!inputImageWrapper.inImageWithBorder(line[0], 0) || !inputImageWrapper.inImageWithBorder(line[1], 0)) {
+                extendLine(ext);
+                while (ext > 1 && !inputImageWrapper.inImageWithBorder(line[0], 0) || !inputImageWrapper.inImageWithBorder(line[1], 0)) {
+                    ext -= Math.floor(ext/2);
+                    extendLine(-ext);
+                }
+                if (ext <= 1) {
                     return null;
                 }
                 return line;
@@ -7181,6 +7456,12 @@ define('barcode_decoder',["bresenham", "image_debug", 'code_128_reader', 'ean_re
                 return result;
             }
 
+            function getLineLength(line) {
+                return Math.sqrt(
+                    Math.pow(Math.abs(line[1].y - line[0].y), 2) +
+                    Math.pow(Math.abs(line[1].x - line[0].x), 2));
+            }
+
             /**
              * With the help of the configured readers (Code128 or EAN) this function tries to detect a 
              * valid barcode pattern within the given area.
@@ -7191,15 +7472,17 @@ define('barcode_decoder',["bresenham", "image_debug", 'code_128_reader', 'ean_re
                 var line,
                     lineAngle,
                     ctx = _canvas.ctx.overlay,
-                    result;
+                    result,
+                    lineLength;
 
                 if (config.drawBoundingBox && ctx) {
                     ImageDebug.drawPath(box, {x: 0, y: 1}, ctx, {color: "blue", lineWidth: 2});
                 }
 
                 line = getLine(box);
+                lineLength = getLineLength(line);
                 lineAngle = Math.atan2(line[1].y - line[0].y, line[1].x - line[0].x);
-                line = getExtendedLine(line, lineAngle, 10);
+                line = getExtendedLine(line, lineAngle, Math.floor(lineLength*0.1));
                 if(line === null){
                     return null;
                 }
@@ -7531,7 +7814,8 @@ define('events',[],function() {
 
 define('camera_access',["html_utils"], function(HtmlUtils) {
     
-    var streamRef;
+    var streamRef,
+        loadedDataHandler;
     
     /**
      * Wraps browser-specific getUserMedia
@@ -7547,17 +7831,7 @@ define('camera_access',["html_utils"], function(HtmlUtils) {
         }, failure);
     }
 
-    /**
-     * Tries to attach the camera-stream to a given video-element
-     * and calls the callback function when the content is ready
-     * @param {Object} constraints
-     * @param {Object} video
-     * @param {Object} callback
-     */
-    function initCamera(constraints, video, callback) {
-        getUserMedia(constraints, function(src) {
-            video.src = src;
-            video.addEventListener('loadeddata', function() {
+    function loadedData(video, callback) {
         var attempts = 10;
 
         function checkVideo() {
@@ -7573,9 +7847,24 @@ define('camera_access',["html_utils"], function(HtmlUtils) {
             }
             attempts--;
         }
-
         checkVideo();
-            }, false);
+    }
+
+    /**
+     * Tries to attach the camera-stream to a given video-element
+     * and calls the callback function when the content is ready
+     * @param {Object} constraints
+     * @param {Object} video
+     * @param {Object} callback
+     */
+    function initCamera(constraints, video, callback) {
+        getUserMedia(constraints, function(src) {
+            video.src = src;
+            if (loadedDataHandler) {
+                video.removeEventListener("loadeddata", loadedDataHandler, false);
+            }
+            loadedDataHandler = loadedData.bind(null, video, callback);
+            video.addEventListener('loadeddata', loadedDataHandler, false);
             video.play();
         }, function(e) {
             console.log(e);
@@ -8064,8 +8353,14 @@ function(Code128Reader,
         },
         stop : function() {
             _stopped = true;
+            _workerPool.forEach(function(workerThread) {
+                workerThread.worker.terminate();
+                console.log("Worker terminated!");
+            });
+            _workerPool.length = 0;
             if (_config.inputStream.type === "LiveStream") {
                 CameraAccess.release();
+                _inputStream.clearEventHandlers();
             }
         },
         pause: function() {

examples/live_w_locator.html

@@ -6,23 +6,64 @@ showInMenu: false
 
 <section id="container" class="container">
     <h3>The user's camera</h3>
-    <p>If your platform supports the <strong>getUserMedia</strong> API call, you can try the real-time locating and decoding features.
-        Simply allow the page to access your web-cam and point it to a barcode. You can switch between <strong>Code128</strong>
-        and <strong>EAN</strong> to test different scenarios.
-        It works best if your camera has built-in auto-focus.
-        </p>
+    <p>If your platform supports the <strong>getUserMedia</strong> API call, you
+        can try the real-time locating and decoding features.
+        Simply allow the page to access your web-cam and point it to a barcode.</p>
+    <p>The various options available allow you to adjust the decoding
+        process to your needs (Type of barcode, resolution, ...)</p>
     <div class="controls">
-    <fieldset class="reader-group">
-        <label>Code128</label>
-        <input type="radio" name="reader" value="code_128" checked />
-        <label>EAN</label>
-        <input type="radio" name="reader" value="ean" />
-        <label>Code39</label>
-        <input type="radio" name="reader" value="code_39" />
-        <label>Codabar</label>
-        <input type="radio" name="reader" value="codabar" />
+        <fieldset class="input-group">
+            <button class="stop">Stop</button>
+        </fieldset>
+        <fieldset class="reader-config-group">
+            <label>
+                <span>Barcode-Type</span>
+                <select name="decoder_readers">
+                    <option value="code_128" selected="selected">Code 128</option>
+                    <option value="code_39">Code 39</option>
+                    <option value="ean">EAN</option>
+                    <option value="ean_8">EAN-8</option>
+                    <option value="upc">UPC</option>
+                    <option value="upc_e">UPC-E</option>
+                    <option value="codabar">Codabar</option>
+                </select>
+            </label>
+            <label>
+                <span>Resolution (long side)</span>
+                <select name="input-stream_constraints">
+                    <option value="320x240">320px</option>
+                    <option selected="selected" value="640x480">640px</option>
+                    <option value="800x600">800px</option>
+                    <option value="1280x720">1280px</option>
+                    <option value="1600x960">1600px</option>
+                    <option value="1920x1080">1920px</option>
+                </select>
+            </label>
+            <label>
+                <span>Patch-Size</span>
+                <select name="locator_patch-size">
+                    <option value="x-small">x-small</option>
+                    <option value="small">small</option>
+                    <option selected="selected" value="medium">medium</option>
+                    <option value="large">large</option>
+                    <option value="x-large">x-large</option>
+                </select>
+            </label>
+            <label>
+                <span>Half-Sample</span>
+                <input type="checkbox" checked="checked" name="locator_half-sample" />
+            </label>
+            <label>
+                <span>Workers</span>
+                <select name="numOfWorkers">
+                    <option value="0">0</option>
+                    <option value="1">1</option>
+                    <option value="2">2</option>
+                    <option selected="selected" value="4">4</option>
+                    <option value="8">8</option>
+                </select>
+            </label>
         </fieldset>
-    <br clear="all" />
     </div>
     <div id="result_strip">
         <ul class="thumbnails"></ul>

examples/live_w_locator.js

@@ -1,27 +1,103 @@
 $(function() {
     var App = {
         init : function() {
-            Quagga.init({
-                inputStream : {
-                    name : "Live",
-                    type : "LiveStream"
-                },
-                decoder : {
-                    readers : ["code_128_reader"]
-                }
-            }, function() {
+            Quagga.init(this.state, function() {
                 App.attachListeners();
                 Quagga.start();
             });
         },
-        attachListeners : function() {
-            $(".controls .reader-group").on("change", "input", function(e) {
+        attachListeners: function() {
+            var self = this;
+
+            $(".controls").on("click", "button.stop", function(e) {
                 e.preventDefault();
-                Quagga.setReaders([e.target.value + "_reader"]);
+                Quagga.stop();
+            });
+
+            $(".controls .reader-config-group").on("change", "input, select", function(e) {
+                e.preventDefault();
+                var $target = $(e.target),
+                    value = $target.attr("type") === "checkbox" ? $target.prop("checked") : $target.val(),
+                    name = $target.attr("name"),
+                    state = self._convertNameToState(name);
+
+                console.log("Value of "+ state + " changed to " + value);
+                self.setState(state, value);
             });
         },
-        detachListeners : function() {
-            $(".controls .reader-group").off("change", "input");
+        _accessByPath: function(obj, path, val) {
+            var parts = path.split('.'),
+                depth = parts.length,
+                setter = (typeof val !== "undefined") ? true : false;
+
+            return parts.reduce(function(o, key, i) {
+                if (setter && (i + 1) === depth) {
+                    o[key] = val;
+                }
+                return key in o ? o[key] : {};
+            }, obj);
+        },
+        _convertNameToState: function(name) {
+            return name.replace("_", ".").split("-").reduce(function(result, value) {
+                return result + value.charAt(0).toUpperCase() + value.substring(1);
+            });
+        },
+        detachListeners: function() {
+            $(".controls").off("click", "button.stop");
+            $(".controls .reader-config-group").off("change", "input, select");
+        },
+        setState: function(path, value) {
+            var self = this;
+
+            if (typeof self._accessByPath(self.inputMapper, path) === "function") {
+                value = self._accessByPath(self.inputMapper, path)(value);
+            }
+
+            self._accessByPath(self.state, path, value);
+
+            console.log(JSON.stringify(self.state));
+            App.detachListeners();
+            Quagga.stop();
+            App.init();
+        },
+        inputMapper: {
+            inputStream: {
+                constraints: function(value){
+                    var values = value.split('x');
+                    return {
+                        width: parseInt(values[0]),
+                        height: parseInt(values[1]),
+                        facing: "environment"
+                    }
+                }
+            },
+            numOfWorkers: function(value) {
+                return parseInt(value);
+            },
+            decoder: {
+                readers: function(value) {
+                    return [value + "_reader"];
+                }
+            }
+        },
+        state: {
+            inputStream: {
+                type : "LiveStream",
+                constraints: {
+                    width: 640,
+                    height: 480,
+                    facing: "environment" // or user
+                }
+            },
+            locator: {
+                patchSize: "medium",
+                halfSample: true
+            },
+            numOfWorkers: 4,
+            decoder: {
+                readers : ["code_128_reader"]
+            },
+            locate: true
         },
         lastResult : null
     };

examples/static_images.html

@@ -7,23 +7,27 @@ showInMenu: false
 
 <section id="container" class="container">
     <h3>Working with static images</h3>
-    <p>This examples uses static image files as input which are loaded from the server on startup.
-        The locating and decoding process takes place inside the browser.
-        Hit the <strong>next</strong> button to try a different image. You can also switch between
-        two different test-sets. Each of those contains 10 images, demonstrating the capabilities of decoding
-        <strong>Code128</strong> and <strong>EAN</strong> encoded barcodes.
+    <p>This examples uses static image files as input which are loaded from
+        the server on startup. The locating and decoding process takes place
+        inside the browser. Hit the <strong>next</strong> button to try a
+        different image. You can also switch between different test-sets,
+        depending on the barcode-type.
     </p>
     <div class="controls">
+        <fieldset class="input-group">
             <button class="next">Next</button>
-    <fieldset class="reader-group">
-        <label>Code128</label>
-        <input type="radio" name="reader" value="code_128" checked />
-        <label>EAN</label>
-        <input type="radio" name="reader" value="ean" />
-        <label>Code39</label>
-        <input type="radio" name="reader" value="code_39" />
-        <label>Codabar</label>
-        <input type="radio" name="reader" value="codabar" />
+        </fieldset>
+        <fieldset class="reader-config-group">
+            <span>Barcode-Type</span>
+            <select name="decoder_readers;input-stream_src">
+                <option value="code_128" selected="selected">Code 128</option>
+                <option value="code_39">Code 39</option>
+                <option value="ean">EAN</option>
+                <option value="ean_8">EAN-8</option>
+                <option value="upc">UPC</option>
+                <option value="upc_e">UPC-E</option>
+                <option value="codabar">Codabar</option>
+            </select>
         </fieldset>
     </div>
   <div id="result_strip">

examples/static_images.js

@@ -1,16 +1,7 @@
 $(function() {
     var App = {
         init: function() {
-            Quagga.init({
-                inputStream: { name: "Test",
-                   type: "ImageStream",
-                   src: site.baseurl + "/test/fixtures/" + App.config.reader + "/",
-                   length: App.config.length
-                },
-                decoder : {
-                    readers : [App.config.reader + "_reader"]
-                }
-            }, function() {
+            Quagga.init(this.state, function() {
                 App.attachListeners();
                 Quagga.start();
             });
@@ -20,22 +11,85 @@ $(function() {
             length: 10
         },
         attachListeners: function() {
+            var self = this;
+
             $(".controls").on("click", "button.next", function(e) {
                 e.preventDefault();
                 Quagga.start();
             });
 
-            $(".controls .reader-group").on("change", "input", function(e) {
+            $(".controls .reader-config-group").on("change", "input, select", function(e) {
                 e.preventDefault();
-                App.detachListeners();
-                Quagga.stop();
-                App.config.reader = e.target.value;
-                App.init();
+                var $target = $(e.target),
+                    value = $target.attr("type") === "checkbox" ? $target.prop("checked") : $target.val(),
+                    name = $target.attr("name"),
+                    states = self._convertNameToStates(name);
+
+                console.log("Value of "+ states + " changed to " + value);
+                self.setState(states, value);
             });
         },
         detachListeners: function() {
             $(".controls").off("click", "button.next");
-            $(".controls .reader-group").off("change", "input");
+            $(".controls .reader-config-group").off("change", "input, select");
+        },
+        _accessByPath: function(obj, path, val) {
+            var parts = path.split('.'),
+                depth = parts.length,
+                setter = (typeof val !== "undefined") ? true : false;
+
+            return parts.reduce(function(o, key, i) {
+                if (setter && (i + 1) === depth) {
+                    o[key] = val;
+                }
+                return key in o ? o[key] : {};
+            }, obj);
+        },
+        _convertNameToStates: function(names) {
+            return names.split(";").map(this._convertNameToState.bind(this));
+        },
+        _convertNameToState: function(name) {
+            return name.replace("_", ".").split("-").reduce(function(result, value) {
+                return result + value.charAt(0).toUpperCase() + value.substring(1);
+            });
+        },
+        setState: function(paths, value) {
+            var self = this;
+
+            paths.forEach(function(path) {
+                var mappedValue;
+                if (typeof self._accessByPath(self.inputMapper, path) === "function") {
+                    mappedValue = self._accessByPath(self.inputMapper, path)(value);
+                }
+                self._accessByPath(self.state, path, mappedValue);
+            });
+
+            console.log(JSON.stringify(self.state));
+            App.detachListeners();
+            Quagga.stop();
+            App.init();
+        },
+        inputMapper: {
+            decoder: {
+                readers: function(value) {
+                    return [value + "_reader"];
+                }
+            },
+            inputStream: {
+                src: function(value) {
+                    return site.baseurl + "/test/fixtures/" + value + "/"
+                }
+            }
+        },
+        state: {
+            inputStream: { name: "Test",
+                type: "ImageStream",
+                src: site.baseurl + "/test/fixtures/code_128/",
+                length: 10
+            },
+            decoder : {
+                readers : ["code_128_reader"]
+            }
         }
     };
     

index.md

@@ -7,16 +7,17 @@ showInMenu: true
 quaggaJS
 ========
 
-- [Changelog](#changelog) (2015-04-25)
+- [Changelog](#changelog) (2015-04-30)
 
 ## What is QuaggaJS?
 
 QuaggaJS is a barcode-scanner entirely written in JavaScript supporting real-
 time localization and decoding of various types of barcodes such as __EAN__,
-__CODE128__, __CODE39__ and __CODABAR__. The library is also capable of using
-`getUserMedia` to get direct access to the user's camera stream. Although the
-code relies on heavy image-processing even recent smartphones are capable of
-locating and decoding barcodes in real-time.
+__CODE 128__, __CODE 39__, __EAN 8__, __UPC-A__, __UPC-C__ and  __CODABAR__.
+The library is also capable of using `getUserMedia` to get direct access to
+the user's camera stream. Although the code relies on heavy image-processing
+even recent smartphones are capable of locating and decoding barcodes in
+real-time.
 
 Try some [examples](http://serratus.github.io/quaggaJS/examples) and check out
 the blog post ([How barcode-localization works in QuaggaJS][oberhofer_co_how])
@@ -298,6 +299,15 @@ work.
 
 ## <a name="changelog">Changelog</a>
 
+### 2015-04-30
+- Features
+  - Added support for [UPC-A and UPC-E][upc_wiki] barcodes
+  - Added support for [EAN-8][ean_8_wiki] barcodes
+- Improvements
+  - Added extended configuration to the
+    [live-video example]({{ site.baseurl }}/examples/live_w_locator.html)
+  - Releasing resources when calling ``Quagga.stop()``
+
 ### 2015-04-25
 - Improvements
   - Added extended configuration to the
@@ -353,5 +363,7 @@ introduced to the API.
 [karmaUrl]: http://karma-runner.github.io/
 [code39_wiki]: http://en.wikipedia.org/wiki/Code_39
 [codabar_wiki]: http://en.wikipedia.org/wiki/Codabar
+[upc_wiki]: http://en.wikipedia.org/wiki/Universal_Product_Code
+[ean_8_wiki]: http://en.wikipedia.org/wiki/EAN-8
 [oberhofer_co_how]: http://www.oberhofer.co/how-barcode-localization-works-in-quaggajs/
 [github_examples]: http://serratus.github.io/quaggaJS/examples