react-qr-reader
Version:
A React Component for reading QR codes from the webcam
1 lines • 368 kB
JavaScript
import*as t from"react";import{useRef as e,useEffect as r}from"react";var n,o,i=(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)}),a=function(t){function e(e){var r,n,o,i=this.constructor,a=t.call(this,e)||this;return Object.defineProperty(a,"name",{value:i.name,enumerable:!1,configurable:!0}),r=a,n=i.prototype,(o=Object.setPrototypeOf)?o(r,n):r.__proto__=n,function(t,e){void 0===e&&(e=t.constructor);var r=Error.captureStackTrace;r&&r(t,e)}(a),a}return i(e,t),e}(Error),u=function(){var t=function(e,r){return t=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},t(e,r)};return function(e,r){function 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r=this.bits,n=Math.floor(t/32),o=r[n];o&=~((1<<(31&t))-1);for(var i=r.length;0===o;){if(++n===i)return e;o=r[n]}var a=32*n+I.numberOfTrailingZeros(o);return a>e?e:a},t.prototype.getNextUnset=function(t){var e=this.size;if(t>=e)return e;var r=this.bits,n=Math.floor(t/32),o=~r[n];o&=~((1<<(31&t))-1);for(var i=r.length;0===o;){if(++n===i)return e;o=~r[n]}var a=32*n+I.numberOfTrailingZeros(o);return a>e?e:a},t.prototype.setBulk=function(t,e){this.bits[Math.floor(t/32)]=e},t.prototype.setRange=function(t,e){if(e<t||t<0||e>this.size)throw new l;if(e!==t){e--;for(var r=Math.floor(t/32),n=Math.floor(e/32),o=this.bits,i=r;i<=n;i++){var a=(2<<(i<n?31:31&e))-(1<<(i>r?0:31&t));o[i]|=a}}},t.prototype.clear=function(){for(var t=this.bits.length,e=this.bits,r=0;r<t;r++)e[r]=0},t.prototype.isRange=function(t,e,r){if(e<t||t<0||e>this.size)throw new l;if(e===t)return!0;e--;for(var n=Math.floor(t/32),o=Math.floor(e/32),i=this.bits,a=n;a<=o;a++){var u=(2<<(a<o?31:31&e))-(1<<(a>n?0:31&t))&4294967295;if((i[a]&u)!==(r?u:0))return!1}return!0},t.prototype.appendBit=function(t){this.ensureCapacity(this.size+1),t&&(this.bits[Math.floor(this.size/32)]|=1<<(31&this.size)),this.size++},t.prototype.appendBits=function(t,e){if(e<0||e>32)throw new l("Num bits must be between 0 and 32");this.ensureCapacity(this.size+e);for(var r=e;r>0;r--)this.appendBit(1==(t>>r-1&1))},t.prototype.appendBitArray=function(t){var e=t.size;this.ensureCapacity(this.size+e);for(var r=0;r<e;r++)this.appendBit(t.get(r))},t.prototype.xor=function(t){if(this.size!==t.size)throw new l("Sizes don't match");for(var e=this.bits,r=0,n=e.length;r<n;r++)e[r]^=t.bits[r]},t.prototype.toBytes=function(t,e,r,n){for(var o=0;o<n;o++){for(var i=0,a=0;a<8;a++)this.get(t)&&(i|=1<<7-a),t++;e[r+o]=i}},t.prototype.getBitArray=function(){return this.bits},t.prototype.reverse=function(){for(var t=new Int32Array(this.bits.length),e=Math.floor((this.size-1)/32),r=e+1,n=this.bits,o=0;o<r;o++){var i=n[o];i=(i=(i=(i=(i=i>>1&1431655765|(1431655765&i)<<1)>>2&858993459|(858993459&i)<<2)>>4&252645135|(252645135&i)<<4)>>8&16711935|(16711935&i)<<8)>>16&65535|(65535&i)<<16,t[e-o]=i}if(this.size!==32*r){var a=32*r-this.size,u=t[0]>>>a;for(o=1;o<r;o++){var s=t[o];u|=s<<32-a,t[o-1]=u,u=s>>>a}t[r-1]=u}this.bits=t},t.makeArray=function(t){return new Int32Array(Math.floor((t+31)/32))},t.prototype.equals=function(e){if(!(e instanceof t))return!1;var r=e;return this.size===r.size&&C.equals(this.bits,r.bits)},t.prototype.hashCode=function(){return 31*this.size+C.hashCode(this.bits)},t.prototype.toString=function(){for(var t="",e=0,r=this.size;e<r;e++)0==(7&e)&&(t+=" "),t+=this.get(e)?"X":".";return t},t.prototype.clone=function(){return new t(this.size,this.bits.slice())},t}();!function(t){t[t.OTHER=0]="OTHER",t[t.PURE_BARCODE=1]="PURE_BARCODE",t[t.POSSIBLE_FORMATS=2]="POSSIBLE_FORMATS",t[t.TRY_HARDER=3]="TRY_HARDER",t[t.CHARACTER_SET=4]="CHARACTER_SET",t[t.ALLOWED_LENGTHS=5]="ALLOWED_LENGTHS",t[t.ASSUME_CODE_39_CHECK_DIGIT=6]="ASSUME_CODE_39_CHECK_DIGIT",t[t.ASSUME_GS1=7]="ASSUME_GS1",t[t.RETURN_CODABAR_START_END=8]="RETURN_CODABAR_START_END",t[t.NEED_RESULT_POINT_CALLBACK=9]="NEED_RESULT_POINT_CALLBACK",t[t.ALLOWED_EAN_EXTENSIONS=10]="ALLOWED_EAN_EXTENSIONS"}(o||(o={}));var O,T=o,b=function(){var t=function(e,r){return t=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},t(e,r)};return function(e,r){function n(){this.constructor=e}t(e,r),e.prototype=null===r?Object.create(r):(n.prototype=r.prototype,new n)}}(),R=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return 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t(O.ISO8859_14,16,"ISO-8859-14","ISO885914","ISO8859_14"),t.ISO8859_15=new t(O.ISO8859_15,17,"ISO-8859-15","ISO885915","ISO8859_15"),t.ISO8859_16=new t(O.ISO8859_16,18,"ISO-8859-16","ISO885916","ISO8859_16"),t.SJIS=new t(O.SJIS,20,"SJIS","Shift_JIS"),t.Cp1250=new t(O.Cp1250,21,"Cp1250","windows-1250"),t.Cp1251=new t(O.Cp1251,22,"Cp1251","windows-1251"),t.Cp1252=new t(O.Cp1252,23,"Cp1252","windows-1252"),t.Cp1256=new t(O.Cp1256,24,"Cp1256","windows-1256"),t.UnicodeBigUnmarked=new t(O.UnicodeBigUnmarked,25,"UnicodeBigUnmarked","UTF-16BE","UnicodeBig"),t.UTF8=new t(O.UTF8,26,"UTF8","UTF-8"),t.ASCII=new t(O.ASCII,Int32Array.from([27,170]),"ASCII","US-ASCII"),t.Big5=new t(O.Big5,28,"Big5"),t.GB18030=new t(O.GB18030,29,"GB18030","GB2312","EUC_CN","GBK"),t.EUC_KR=new t(O.EUC_KR,30,"EUC_KR","EUC-KR"),t}(),M=function(){var t=function(e,r){return t=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in 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h=u-1,l=-1;for(a=u-1;a>o;a--){var d,p=a-o;(d=p*p*(u-a)*(n-t[a]))>l&&(h=a,l=d)}return h<<e.LUMINANCE_SHIFT},e.LUMINANCE_BITS=5,e.LUMINANCE_SHIFT=8-e.LUMINANCE_BITS,e.LUMINANCE_BUCKETS=1<<e.LUMINANCE_BITS,e.EMPTY=Uint8ClampedArray.from([0]),e}(y),X=function(){var t=function(e,r){return t=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},t(e,r)};return function(e,r){function n(){this.constructor=e}t(e,r),e.prototype=null===r?Object.create(r):(n.prototype=r.prototype,new n)}}(),W=function(t){function e(e){var r=t.call(this,e)||this;return r.matrix=null,r}return X(e,t),e.prototype.getBlackMatrix=function(){if(null!==this.matrix)return this.matrix;var r=this.getLuminanceSource(),n=r.getWidth(),o=r.getHeight();if(n>=e.MINIMUM_DIMENSION&&o>=e.MINIMUM_DIMENSION){var i=r.getMatrix(),a=n>>e.BLOCK_SIZE_POWER;0!=(n&e.BLOCK_SIZE_MASK)&&a++;var u=o>>e.BLOCK_SIZE_POWER;0!=(o&e.BLOCK_SIZE_MASK)&&u++;var s=e.calculateBlackPoints(i,a,u,n,o),c=new x(n,o);e.calculateThresholdForBlock(i,a,u,n,o,s,c),this.matrix=c}else this.matrix=t.prototype.getBlackMatrix.call(this);return this.matrix},e.prototype.createBinarizer=function(t){return new e(t)},e.calculateThresholdForBlock=function(t,r,n,o,i,a,u){for(var s=i-e.BLOCK_SIZE,c=o-e.BLOCK_SIZE,f=0;f<n;f++){var h=f<<e.BLOCK_SIZE_POWER;h>s&&(h=s);for(var l=e.cap(f,2,n-3),d=0;d<r;d++){var p=d<<e.BLOCK_SIZE_POWER;p>c&&(p=c);for(var g=e.cap(d,2,r-3),y=0,w=-2;w<=2;w++){var _=a[l+w];y+=_[g-2]+_[g-1]+_[g]+_[g+1]+_[g+2]}var v=y/25;e.thresholdBlock(t,p,h,v,o,u)}}},e.cap=function(t,e,r){return t<e?e:t>r?r:t},e.thresholdBlock=function(t,r,n,o,i,a){for(var u=0,s=n*i+r;u<e.BLOCK_SIZE;u++,s+=i)for(var c=0;c<e.BLOCK_SIZE;c++)(255&t[s+c])<=o&&a.set(r+c,n+u)},e.calculateBlackPoints=function(t,r,n,o,i){for(var a=i-e.BLOCK_SIZE,u=o-e.BLOCK_SIZE,s=new Array(n),c=0;c<n;c++){s[c]=new Int32Array(r);var f=c<<e.BLOCK_SIZE_POWER;f>a&&(f=a);for(var h=0;h<r;h++){var l=h<<e.BLOCK_SIZE_POWER;l>u&&(l=u);for(var d=0,p=255,g=0,y=0,w=f*o+l;y<e.BLOCK_SIZE;y++,w+=o){for(var _=0;_<e.BLOCK_SIZE;_++){var v=255&t[w+_];d+=v,v<p&&(p=v),v>g&&(g=v)}if(g-p>e.MIN_DYNAMIC_RANGE)for(y++,w+=o;y<e.BLOCK_SIZE;y++,w+=o)for(_=0;_<e.BLOCK_SIZE;_++)d+=255&t[w+_]}var m=d>>2*e.BLOCK_SIZE_POWER;if(g-p<=e.MIN_DYNAMIC_RANGE&&(m=p/2,c>0&&h>0)){var A=(s[c-1][h]+2*s[c][h-1]+s[c-1][h-1])/4;p<A&&(m=A)}s[c][h]=m}}return s},e.BLOCK_SIZE_POWER=3,e.BLOCK_SIZE=1<<e.BLOCK_SIZE_POWER,e.BLOCK_SIZE_MASK=e.BLOCK_SIZE-1,e.MINIMUM_DIMENSION=5*e.BLOCK_SIZE,e.MIN_DYNAMIC_RANGE=24,e}(G),j=function(){function t(t,e){this.width=t,this.height=e}return t.prototype.getWidth=function(){return this.width},t.prototype.getHeight=function(){return this.height},t.prototype.isCropSupported=function(){return!1},t.prototype.crop=function(t,e,r,n){throw new B("This luminance source does not support cropping.")},t.prototype.isRotateSupported=function(){return!1},t.prototype.rotateCounterClockwise=function(){throw new B("This luminance source does not support rotation by 90 degrees.")},t.prototype.rotateCounterClockwise45=function(){throw new B("This luminance source does not support rotation by 45 degrees.")},t.prototype.toString=function(){for(var t=new Uint8ClampedArray(this.width),e=new k,r=0;r<this.height;r++){for(var n=this.getRow(r,t),o=0;o<this.width;o++){var i=255&n[o],a=void 0;a=i<64?"#":i<128?"+":i<192?".":" ",e.append(a)}e.append("\n")}return e.toString()},t}(),z=function(){var t=function(e,r){return t=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},t(e,r)};return function(e,r){function n(){this.constructor=e}t(e,r),e.prototype=null===r?Object.create(r):(n.prototype=r.prototype,new n)}}(),Y=function(t){function e(e){var r=t.call(this,e.getWidth(),e.getHeight())||this;return r.delegate=e,r}return z(e,t),e.prototype.getRow=function(t,e){for(var r=this.delegate.getRow(t,e),n=this.getWidth(),o=0;o<n;o++)r[o]=255-(255&r[o]);return r},e.prototype.getMatrix=function(){for(var t=this.delegate.getMatrix(),e=this.getWidth()*this.getHeight(),r=new Uint8ClampedArray(e),n=0;n<e;n++)r[n]=255-(255&t[n]);return r},e.prototype.isCropSupported=function(){return this.delegate.isCropSupported()},e.prototype.crop=function(t,r,n,o){return new e(this.delegate.crop(t,r,n,o))},e.prototype.isRotateSupported=function(){return this.delegate.isRotateSupported()},e.prototype.invert=function(){return this.delegate},e.prototype.rotateCounterClockwise=function(){return new e(this.delegate.rotateCounterClockwise())},e.prototype.rotateCounterClockwise45=function(){return new e(this.delegate.rotateCounterClockwise45())},e}(j),Z=function(){var t=function(e,r){return t=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},t(e,r)};return function(e,r){function 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this.buffer},e.prototype.isCropSupported=function(){return!0},e.prototype.crop=function(e,r,n,o){return t.prototype.crop.call(this,e,r,n,o),this},e.prototype.isRotateSupported=function(){return!0},e.prototype.rotateCounterClockwise=function(){return this.rotate(-90),this},e.prototype.rotateCounterClockwise45=function(){return this.rotate(-45),this},e.prototype.getTempCanvasElement=function(){if(null===this.tempCanvasElement){var t=this.canvas.ownerDocument.createElement("canvas");t.width=this.canvas.width,t.height=this.canvas.height,this.tempCanvasElement=t}return this.tempCanvasElement},e.prototype.rotate=function(t){var r=this.getTempCanvasElement(),n=r.getContext("2d"),o=t*e.DEGREE_TO_RADIANS,i=this.canvas.width,a=this.canvas.height,u=Math.ceil(Math.abs(Math.cos(o))*i+Math.abs(Math.sin(o))*a),s=Math.ceil(Math.abs(Math.sin(o))*i+Math.abs(Math.cos(o))*a);return r.width=u,r.height=s,n.translate(u/2,s/2),n.rotate(o),n.drawImage(this.canvas,i/-2,a/-2),this.buffer=e.makeBufferFromCanvasImageData(r),this},e.prototype.invert=function(){return new Y(this)},e.DEGREE_TO_RADIANS=Math.PI/180,e}(j),q=function(){function t(t,e,r){this.deviceId=t,this.label=e,this.kind="videoinput",this.groupId=r||void 0}return t.prototype.toJSON=function(){return{kind:this.kind,groupId:this.groupId,deviceId:this.deviceId,label:this.label}},t}(),Q=function(t,e,r,n){return new(r||(r=Promise))((function(o,i){function a(t){try{s(n.next(t))}catch(t){i(t)}}function u(t){try{s(n.throw(t))}catch(t){i(t)}}function s(t){var e;t.done?o(t.value):(e=t.value,e instanceof r?e:new r((function(t){t(e)}))).then(a,u)}s((n=n.apply(t,e||[])).next())}))},J=function(t,e){var r,n,o,i,a={label:0,sent:function(){if(1&o[0])throw o[1];return o[1]},trys:[],ops:[]};return i={next:u(0),throw:u(1),return:u(2)},"function"==typeof Symbol&&(i[Symbol.iterator]=function(){return this}),i;function u(i){return function(u){return function(i){if(r)throw new TypeError("Generator is already executing.");for(;a;)try{if(r=1,n&&(o=2&i[0]?n.return:i[0]?n.throw||((o=n.return)&&o.call(n),0):n.next)&&!(o=o.call(n,i[1])).done)return o;switch(n=0,o&&(i=[2&i[0],o.value]),i[0]){case 0:case 1:o=i;break;case 4:return a.label++,{value:i[1],done:!1};case 5:a.label++,n=i[1],i=[0];continue;case 7:i=a.ops.pop(),a.trys.pop();continue;default:if(!(o=a.trys,(o=o.length>0&&o[o.length-1])||6!==i[0]&&2!==i[0])){a=0;continue}if(3===i[0]&&(!o||i[1]>o[0]&&i[1]<o[3])){a.label=i[1];break}if(6===i[0]&&a.label<o[1]){a.label=o[1],o=i;break}if(o&&a.label<o[2]){a.label=o[2],a.ops.push(i);break}o[2]&&a.ops.pop(),a.trys.pop();continue}i=e.call(t,a)}catch(t){i=[6,t],n=0}finally{r=o=0}if(5&i[0])throw i[1];return{value:i[0]?i[1]:void 0,done:!0}}([i,u])}}},$=function(t){var e="function"==typeof Symbol&&Symbol.iterator,r=e&&t[e],n=0;if(r)return r.call(t);if(t&&"number"==typeof t.length)return{next:function(){return t&&n>=t.length&&(t=void 0),{value:t&&t[n++],done:!t}}};throw new TypeError(e?"Object is not iterable.":"Symbol.iterator is not defined.")},tt=function(){function t(t,e,r){void 0===e&&(e=500),this.reader=t,this.timeBetweenScansMillis=e,this._hints=r,this._stopContinuousDecode=!1,this._stopAsyncDecode=!1,this._timeBetweenDecodingAttempts=0}return Object.defineProperty(t.prototype,"hasNavigator",{get:function(){return"undefined"!=typeof navigator},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"isMediaDevicesSuported",{get:function(){return this.hasNavigator&&!!navigator.mediaDevices},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"canEnumerateDevices",{get:function(){return!(!this.isMediaDevicesSuported||!navigator.mediaDevices.enumerateDevices)},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"timeBetweenDecodingAttempts",{get:function(){return this._timeBetweenDecodingAttempts},set:function(t){this._timeBetweenDecodingAttempts=t<0?0:t},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"hints",{get:function(){return this._hints},set:function(t){this._hints=t||null},enumerable:!1,configurable:!0}),t.prototype.listVideoInputDevices=function(){return Q(this,void 0,void 0,(function(){var t,e,r,n,o,i,a,u,s,c,f,h;return J(this,(function(l){switch(l.label){case 0:if(!this.hasNavigator)throw new Error("Can't enumerate devices, navigator is not present.");if(!this.canEnumerateDevices)throw new Error("Can't enumerate devices, method not supported.");return[4,navigator.mediaDevices.enumerateDevices()];case 1:t=l.sent(),e=[];try{for(r=$(t),n=r.next();!n.done;n=r.next())o=n.value,"videoinput"===(i="video"===o.kind?"videoinput":o.kind)&&(a=o.deviceId||o.id,u=o.label||"Video device 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1:return[2,r.sent()]}}))}))},t.prototype.decodeOnceFromVideoDevice=function(t,e){return Q(this,void 0,void 0,(function(){var r;return J(this,(function(n){switch(n.label){case 0:return this.reset(),r={video:t?{deviceId:{exact:t}}:{facingMode:"environment"}},[4,this.decodeOnceFromConstraints(r,e)];case 1:return[2,n.sent()]}}))}))},t.prototype.decodeOnceFromConstraints=function(t,e){return Q(this,void 0,void 0,(function(){var r;return J(this,(function(n){switch(n.label){case 0:return[4,navigator.mediaDevices.getUserMedia(t)];case 1:return r=n.sent(),[4,this.decodeOnceFromStream(r,e)];case 2:return[2,n.sent()]}}))}))},t.prototype.decodeOnceFromStream=function(t,e){return Q(this,void 0,void 0,(function(){var r;return J(this,(function(n){switch(n.label){case 0:return this.reset(),[4,this.attachStreamToVideo(t,e)];case 1:return r=n.sent(),[4,this.decodeOnce(r)];case 2:return[2,n.sent()]}}))}))},t.prototype.decodeFromInputVideoDeviceContinuously=function(t,e,r){return Q(this,void 0,void 0,(function(){return J(this,(function(n){switch(n.label){case 0:return[4,this.decodeFromVideoDevice(t,e,r)];case 1:return[2,n.sent()]}}))}))},t.prototype.decodeFromVideoDevice=function(t,e,r){return Q(this,void 0,void 0,(function(){var n;return J(this,(function(o){switch(o.label){case 0:return n={video:t?{deviceId:{exact:t}}:{facingMode:"environment"}},[4,this.decodeFromConstraints(n,e,r)];case 1:return[2,o.sent()]}}))}))},t.prototype.decodeFromConstraints=function(t,e,r){return Q(this,void 0,void 0,(function(){var n;return J(this,(function(o){switch(o.label){case 0:return[4,navigator.mediaDevices.getUserMedia(t)];case 1:return n=o.sent(),[4,this.decodeFromStream(n,e,r)];case 2:return[2,o.sent()]}}))}))},t.prototype.decodeFromStream=function(t,e,r){return Q(this,void 0,void 0,(function(){var n;return J(this,(function(o){switch(o.label){case 0:return this.reset(),[4,this.attachStreamToVideo(t,e)];case 1:return n=o.sent(),[4,this.decodeContinuously(n,r)];case 2:return[2,o.sent()]}}))}))},t.prototype.stopAsyncDecode=function(){this._stopAsyncDecode=!0},t.prototype.stopContinuousDecode=function(){this._stopContinuousDecode=!0},t.prototype.attachStreamToVideo=function(t,e){return Q(this,void 0,void 0,(function(){var r;return J(this,(function(n){switch(n.label){case 0:return r=this.prepareVideoElement(e),this.addVideoSource(r,t),this.videoElement=r,this.stream=t,[4,this.playVideoOnLoadAsync(r)];case 1:return n.sent(),[2,r]}}))}))},t.prototype.playVideoOnLoadAsync=function(t){var e=this;return new Promise((function(r,n){return e.playVideoOnLoad(t,(function(){return r()}))}))},t.prototype.playVideoOnLoad=function(t,e){var r=this;this.videoEndedListener=function(){return r.stopStreams()},this.videoCanPlayListener=function(){return r.tryPlayVideo(t)},t.addEventListener("ended",this.videoEndedListener),t.addEventListener("canplay",this.videoCanPlayListener),t.addEventListener("playing",e),this.tryPlayVideo(t)},t.prototype.isVideoPlaying=function(t){return t.currentTime>0&&!t.paused&&!t.ended&&t.readyState>2},t.prototype.tryPlayVideo=function(t){return Q(this,void 0,void 0,(function(){return J(this,(function(e){switch(e.label){case 0:if(this.isVideoPlaying(t))return console.warn("Trying to play video that is already playing."),[2];e.label=1;case 1:return e.trys.push([1,3,,4]),[4,t.play()];case 2:return e.sent(),[3,4];case 3:return e.sent(),console.warn("It was not possible to play the video."),[3,4];case 4:return[2]}}))}))},t.prototype.getMediaElement=function(t,e){var r=document.getElementById(t);if(!r)throw new f("element with id '"+t+"' not found");if(r.nodeName.toLowerCase()!==e.toLowerCase())throw new f("element with id '"+t+"' must be an "+e+" element");return r},t.prototype.decodeFromImage=function(t,e){if(!t&&!e)throw new f("either imageElement with a src set or an url must be provided");return e&&!t?this.decodeFromImageUrl(e):this.decodeFromImageElement(t)},t.prototype.decodeFromVideo=function(t,e){if(!t&&!e)throw new f("Either an element with a src set or an URL must be provided");return e&&!t?this.decodeFromVideoUrl(e):this.decodeFromVideoElement(t)},t.prototype.decodeFromVideoContinuously=function(t,e,r){if(void 0===t&&void 0===e)throw new f("Either an element with a src set or an URL must be provided");return e&&!t?this.decodeFromVideoUrlContinuously(e,r):this.decodeFromVideoElementContinuously(t,r)},t.prototype.decodeFromImageElement=function(t){if(!t)throw new f("An image element must be provided.");this.reset();var e=this.prepareImageElement(t);return this.imageElement=e,this.isImageLoaded(e)?this.decodeOnce(e,!1,!0):this._decodeOnLoadImage(e)},t.prototype.decodeFromVideoElement=function(t){var e=this._decodeFromVideoElementSetup(t);return this._decodeOnLoadVideo(e)},t.prototype.decodeFromVideoElementContinuously=function(t,e){var r=this._decodeFromVideoElementSetup(t);return this._decodeOnLoadVideoContinuously(r,e)},t.prototype._decodeFromVideoElementSetup=function(t){if(!t)throw new f("A video element must be provided.");this.reset();var e=this.prepareVideoElement(t);return this.videoElement=e,e},t.prototype.decodeFromImageUrl=function(t){if(!t)throw new f("An URL must be provided.");this.reset();var e=this.prepareImageElement();this.imageElement=e;var r=this._decodeOnLoadImage(e);return e.src=t,r},t.prototype.decodeFromVideoUrl=function(t){if(!t)throw new f("An URL must be provided.");this.reset();var e=this.prepareVideoElement(),r=this.decodeFromVideoElement(e);return e.src=t,r},t.prototype.decodeFromVideoUrlContinuously=function(t,e){if(!t)throw new f("An URL must be provided.");this.reset();var r=this.prepareVideoElement(),n=this.decodeFromVideoElementContinuously(r,e);return r.src=t,n},t.prototype._decodeOnLoadImage=function(t){var e=this;return new Promise((function(r,n){e.imageLoadedListener=function(){return e.decodeOnce(t,!1,!0).then(r,n)},t.addEventListener("load",e.imageLoadedListener)}))},t.prototype._decodeOnLoadVideo=function(t){return Q(this,void 0,void 0,(function(){return J(this,(function(e){switch(e.label){case 0:return[4,this.playVideoOnLoadAsync(t)];case 1:return e.sent(),[4,this.decodeOnce(t)];case 2:return[2,e.sent()]}}))}))},t.prototype._decodeOnLoadVideoContinuously=function(t,e){return Q(this,void 0,void 0,(function(){return J(this,(function(r){switch(r.label){case 0:return[4,this.playVideoOnLoadAsync(t)];case 1:return r.sent(),this.decodeContinuously(t,e),[2]}}))}))},t.prototype.isImageLoaded=function(t){return!!t.complete&&0!==t.naturalWidth},t.prototype.prepareImageElement=function(t){var e;return void 0===t&&((e=document.createElement("img")).width=200,e.height=200),"string"==typeof t&&(e=this.getMediaElement(t,"img")),t instanceof HTMLImageElement&&(e=t),e},t.prototype.prepareVideoElement=function(t){var e;return t||"undefined"==typeof document||((e=document.createElement("video")).width=200,e.height=200),"string"==typeof t&&(e=this.getMediaElement(t,"video")),t instanceof HTMLVideoElement&&(e=t),e.setAttribute("autoplay","true"),e.setAttribute("muted","true"),e.setAttribute("playsinline","true"),e},t.prototype.decodeOnce=function(t,e,r){var n=this;void 0===e&&(e=!0),void 0===r&&(r=!0),this._stopAsyncDecode=!1;var o=function(i,a){if(n._stopAsyncDecode)return a(new U("Video stream has ended before any code could be detected.")),void(n._stopAsyncDecode=void 0);try{i(n.decode(t))}catch(t){if(e&&t instanceof U||(t instanceof g||t instanceof R)&&r)return setTimeout(o,n._timeBetweenDecodingAttempts,i,a);a(t)}};return new Promise((function(t,e){return o(t,e)}))},t.prototype.decodeContinuously=function(t,e){var r=this;this._stopContinuousDecode=!1;var n=function(){if(r._stopContinuousDecode)r._stopContinuousDecode=void 0;else try{var o=r.decode(t);e(o,null),setTimeout(n,r.timeBetweenScansMillis)}catch(t){e(null,t),(t instanceof g||t instanceof R||t instanceof U)&&setTimeout(n,r._timeBetweenDecodingAttempts)}};n()},t.prototype.decode=function(t){var e=this.createBinaryBitmap(t);return this.decodeBitmap(e)},t.prototype.createBinaryBitmap=function(t){var e=this.getCaptureCanvasContext(t);this.drawImageOnCanvas(e,t);var r=this.getCaptureCanvas(t),n=new K(r),o=new W(n);return new d(o)},t.prototype.getCaptureCanvasContext=function(t){if(!this.captureCanvasContext){var e=this.getCaptureCanvas(t).getContext("2d");this.captureCanvasContext=e}return this.captureCanvasContext},t.prototype.getCaptureCanvas=function(t){if(!this.captureCanvas){var e=this.createCaptureCanvas(t);this.captureCanvas=e}return this.captureCanvas},t.prototype.drawImageOnCanvas=function(t,e){t.drawImage(e,0,0)},t.prototype.decodeBitmap=function(t){return this.reader.decode(t,this._hints)},t.prototype.createCaptureCanvas=function(t){if("undefined"==typeof document)return this._destroyCaptureCanvas(),null;var e,r,n=document.createElement("canvas");return void 0!==t&&(t instanceof HTMLVideoElement?(e=t.videoWidth,r=t.videoHeight):t instanceof HTMLImageElement&&(e=t.naturalWidth||t.width,r=t.naturalHeight||t.height)),n.style.width=e+"px",n.style.height=r+"px",n.width=e,n.height=r,n},t.prototype.stopStreams=function(){this.stream&&(this.stream.getVideoTracks().forEach((function(t){return t.stop()})),this.stream=void 0),!1===this._stopAsyncDecode&&this.stopAsyncDecode(),!1===this._stopContinuousDecode&&this.stopContinuousDecode()},t.prototype.reset=function(){this.stopStreams(),this._destroyVideoElement(),this._destroyImageElement(),this._destroyCaptureCanvas()},t.prototype._destroyVideoElement=function(){this.videoElement&&(void 0!==this.videoEndedListener&&this.videoElement.removeEventListener("ended",this.videoEndedListener),void 0!==this.videoPlayingEventListener&&this.videoElement.removeEventListener("playing",this.videoPlayingEventListener),void 0!==this.videoCanPlayListener&&this.videoElement.removeEventListener("loadedmetadata",this.videoCanPlayListener),this.cleanVideoSource(this.videoElement),this.videoElement=void 0)},t.prototype._destroyImageElement=function(){this.imageElement&&(void 0!==this.imageLoadedListener&&this.imageElement.removeEventListener("load",this.imageLoadedListener),this.imageElement.src=void 0,this.imageElement.removeAttribute("src"),this.