@tensorflow/tfjs-data - npm Package Compare versions

Comparing version 3.5.0 to 3.6.0

dist/miniprogram/index.js

@@ -17,3 +17,3 @@ /**
  */
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o(this,(function(n){switch(n.label){case 0:return this.hasHeader?[4,this.base.iterator()]:[3,3];case 1:return[4,n.sent().next()];case 2:if((t=n.sent()).done)throw new Error("No data was found for CSV parsing.");return e=t.value,[2,this.parseRow(e,!1)];case 3:return[2,null]}}))}))},n.prototype.iterator=function(){return i(this,void 0,void 0,(function(){var t,e=this;return o(this,(function(n){switch(n.label){case 0:return this.columnNamesValidated?[3,2]:[4,this.setColumnNames()];case 1:n.sent(),n.label=2;case 2:return[4,this.base.iterator()];case 3:return t=n.sent(),this.hasHeader&&(t=t.skip(1)),[2,t.map((function(t){return e.makeDataElement(t)}))]}}))}))},n.prototype.makeDataElement=function(t){for(var e=this.parseRow(t),n={},r={},i=0;i<this.fullColumnNames.length;i++){var o=this.fullColumnNames[i],s=this.columnConfigs?this.columnConfigs[o]:null;if(!this.configuredColumnsOnly||s){var u=e[i],a=null;if(""===u)if(s&&void 0!==s.default)a=s.default;else{if(s&&(s.required||s.isLabel))throw new Error("Required column "+o+" is empty in this line: "+t);a=void 0}else{var c=Number(u);if(isNaN(c))a=s&&"bool"===s.dtype?this.getBoolean(u):u;else if(s&&s.dtype)switch(s.dtype){case"float32":a=c;break;case"int32":a=Math.floor(c);break;case"bool":a=this.getBoolean(u);break;default:a=c}else a=c}s&&s.isLabel?r[o]=a:n[o]=a}}return 0===Object.keys(r).length?n:{xs:n,ys:r}},n.prototype.getBoolean=function(t){return"1"===t||"true"===t.toLowerCase()?1:0},n.prototype.parseRow=function(t,e){void 0===e&&(e=!0);for(var n=[],r=0,i=t.length,o=J,s=0;s<i;s++)switch(o){case J:switch(t.charAt(s)){case Z:r=s+1,o=K;break;case this.delimiter:if(r=s+1," "===this.delimiter&&this.delimWhitespace)break;n.push(""),o=J;break;default:o=Y,r=s}break;case Y:switch(t.charAt(s)){case this.delimiter:n.push(t.substring(r,s)),o=J,r=s+1}break;case K:switch(t.charAt(s)){case Z:o=$}break;case $:switch(t.charAt(s)){case this.delimiter:n.push(t.substring(r,s-1)),o=J,r=s+1;break;case Z:o=K;break;default:o=tt}break;case tt:switch(t.charAt(s)){case Z:o=K}}if(o===$?n.push(t.substring(r,i-1)):n.push(t.substring(r)),e&&n.length!==this.fullColumnNames.length)throw new Error("Invalid row in csv file. Should have "+this.fullColumnNames.length+" elements in a row, but got "+n);return n},n}(U),nt=function(t){function n(e){var n=t.call(this)||this;n.microphoneConfig=e,n.isClosed=!1,n.fftSize=e.fftSize||1024;var r=Math.log2(n.fftSize);if(n.fftSize<0||r<4||r>14||!Number.isInteger(r))throw new Error("Invalid fftSize: it must be a power of 2 between 2 to 4 and 2 to 14, but got "+n.fftSize);if(n.numFrames=e.numFramesPerSpectrogram||43,n.sampleRateHz=e.sampleRateHz,n.columnTruncateLength=e.columnTruncateLength||n.fftSize,n.audioTrackConstraints=e.audioTrackConstraints,n.smoothingTimeConstant=e.smoothingTimeConstant||0,n.includeSpectrogram=!1!==e.includeSpectrogram,n.includeWaveform=!0===e.includeWaveform,!n.includeSpectrogram&&!n.includeWaveform)throw new Error("Both includeSpectrogram and includeWaveform are false. 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Actual: "+this.audioContext.sampleRate)}else this.sampleRateHz=this.audioContext.sampleRate;return r=this.audioContext.createMediaStreamSource(this.stream),this.analyser=this.audioContext.createAnalyser(),this.analyser.fftSize=2*this.fftSize,this.analyser.smoothingTimeConstant=this.smoothingTimeConstant,r.connect(this.analyser),this.freqData=new Float32Array(this.fftSize),this.timeData=new Float32Array(this.fftSize),[2]}}))}))},n.prototype.next=function(){return i(this,void 0,void 0,(function(){var t,e,n,r,i;return o(this,(function(o){switch(o.label){case 0:return this.isClosed?[2,{value:null,done:!0}]:[4,this.getAudioData()];case 1:return n=o.sent(),this.includeSpectrogram&&(r=this.flattenQueue(n.freqDataQueue),t=this.getTensorFromAudioDataArray(r,[this.numFrames,this.columnTruncateLength,1])),this.includeWaveform&&(i=this.flattenQueue(n.timeDataQueue),e=this.getTensorFromAudioDataArray(i,[this.numFrames*this.fftSize,1])),[2,{value:{spectrogram:t,waveform:e},done:!1}]}}))}))},n.prototype.capture=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){switch(t.label){case 0:return[4,this.next()];case 1:return[2,t.sent().value]}}))}))},n.prototype.getAudioData=function(){return i(this,void 0,void 0,(function(){var t,e,n,r=this;return o(this,(function(i){return t=[],e=[],n=0,[2,new Promise((function(i){var o=setInterval((function(){r.includeSpectrogram&&(r.analyser.getFloatFrequencyData(r.freqData),r.freqData[0]===-1/0&&i({freqDataQueue:t,timeDataQueue:e}),t.push(r.freqData.slice(0,r.columnTruncateLength))),r.includeWaveform&&(r.analyser.getFloatTimeDomainData(r.timeData),e.push(r.timeData.slice())),++n===r.numFrames&&(clearInterval(o),i({freqDataQueue:t,timeDataQueue:e}))}),r.fftSize/r.sampleRateHz*1e3)}))]}))}))},n.prototype.stop=function(){this.isClosed||(this.isClosed=!0,this.analyser.disconnect(),this.audioContext.close(),null!=this.stream&&this.stream.getTracks().length>0&&this.stream.getTracks()[0].stop())},n.prototype.toArray=function(){throw new Error("Can not convert infinite audio stream to array.")},n.prototype.getSampleRate=function(){return this.sampleRateHz},n.prototype.flattenQueue=function(t){var e=t[0].length,n=new Float32Array(t.length*e);return t.forEach((function(t,r){return n.set(t,r*e)})),n},n.prototype.getTensorFromAudioDataArray=function(t,n){var r=new Float32Array(e.util.sizeFromShape(n));return r.set(t,r.length-t.length),e.tensor(r,n)},n}(T),rt=function(t){function n(n,r){var i=t.call(this)||this;if(i.webcamVideoElement=n,i.webcamConfig=r,i.isClosed=!0,i.resize=!1,i.needToResize())if(i.resize=!0,i.cropSize=[i.webcamConfig.resizeHeight,i.webcamConfig.resizeWidth],i.cropBoxInd=e.tensor1d([0],"int32"),i.webcamConfig.centerCrop){var o=1*i.webcamConfig.resizeWidth/i.webcamVideoElement.width,s=1*i.webcamConfig.resizeHeight/i.webcamVideoElement.height,u=(1-o)/2,a=(1-s)/2,c=u+o,h=s+a;i.cropBox=e.tensor2d([a,u,h,c],[1,4])}else i.cropBox=e.tensor2d([0,0,1,1],[1,4]);return i}return r(n,t),n.prototype.summary=function(){return"webcam"},n.create=function(t,r){return void 0===r&&(r={}),i(this,void 0,void 0,(function(){var i;return o(this,(function(o){switch(o.label){case 0:if(e.env().get("IS_NODE"))throw new Error("tf.data.webcam is only supported in browser environment.");if(!t){if(t=document.createElement("video"),!r.resizeWidth||!r.resizeHeight)throw new Error("Please provide webcam video element, or resizeWidth and resizeHeight to create a hidden video element.");t.width=r.resizeWidth,t.height=r.resizeHeight}return[4,(i=new n(t,r)).start()];case 1:return o.sent(),[2,i]}}))}))},n.prototype.start=function(){return i(this,void 0,void 0,(function(){var t,n,r=this;return o(this,(function(i){switch(i.label){case 0:this.webcamConfig.facingMode&&e.util.assert("user"===this.webcamConfig.facingMode||"environment"===this.webcamConfig.facingMode,(function(){return"Invalid webcam facing mode: "+r.webcamConfig.facingMode+". 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o(this,(function(n){if(this.isClosed)return[2,{value:null,done:!0}];try{t=e.browser.fromPixels(this.webcamVideoElement)}catch(t){throw new Error("Error thrown converting video to pixels: "+JSON.stringify(t))}if(!this.resize)return[2,{value:t,done:!1}];try{return[2,{value:this.cropAndResizeFrame(t),done:!1}]}catch(t){throw new Error("Error thrown cropping the video: "+t.message)}finally{t.dispose()}return[2]}))}))},n.prototype.needToResize=function(){return!(!this.webcamConfig.resizeWidth||!this.webcamConfig.resizeHeight||this.webcamVideoElement.width===this.webcamConfig.resizeWidth&&this.webcamVideoElement.height===this.webcamConfig.resizeHeight)},n.prototype.cropAndResizeFrame=function(t){var n=this;return e.tidy((function(){var r,i=e.expandDims(e.cast(t,"float32"),0),o=(r=e.image.cropAndResize(i,n.cropBox,n.cropBoxInd,n.cropSize,"bilinear")).shape;return e.reshape(r,o.slice(1))}))},n.prototype.capture=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){switch(t.label){case 0:return[4,this.next()];case 1:return[2,t.sent().value]}}))}))},n.prototype.stop=function(){this.stream.getTracks().forEach((function(t){return t.stop()}));try{this.webcamVideoElement.srcObject=null}catch(t){console.log(t),this.webcamVideoElement.src=null}this.isClosed=!0},n.prototype.toArray=function(){throw new Error("Can not convert infinite video stream to array.")},n}(T),it=function(){},ot=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return r(e,t),e.prototype.split=function(t){return new st(this,t)},e}(T),st=function(t){function e(e,n){var r=t.call(this)||this;return r.upstream=e,r.impl=new ut(e,n),r}return r(e,t),e.prototype.summary=function(){return this.impl.summary()},e.prototype.next=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){return[2,this.impl.next()]}))}))},e}(ot),ut=function(t){function e(e,n){var r=t.call(this)||this;return r.upstream=e,r.separator=n,r.carryover="",r}return r(e,t),e.prototype.summary=function(){return this.upstream.summary()+" -> Split('"+this.separator+"')"},e.prototype.pump=function(){return i(this,void 0,void 0,(function(){var t,e,n,r,i;return o(this,(function(o){switch(o.label){case 0:return[4,this.upstream.next()];case 1:if((t=o.sent()).done)return""===this.carryover?[2,!1]:(this.outputQueue.push(this.carryover),this.carryover="",[2,!0]);for((e=t.value.split(this.separator))[0]=this.carryover+e[0],n=0,r=e.slice(0,-1);n<r.length;n++)i=r[n],this.outputQueue.push(i);return this.carryover=e[e.length-1],[2,!0]}}))}))},e}(q),at=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return r(e,t),e.prototype.decodeUTF8=function(){return new ct(this)},e}(T),ct=function(t){function e(e){var n=t.call(this)||this;return n.upstream=e,n.impl=new ht(e),n}return r(e,t),e.prototype.summary=function(){return this.impl.summary()},e.prototype.next=function(){return i(this,void 0,void 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1:return[2,(e.value=r.sent(),e.done=!1,e)]}}))}))},n}(at);function ft(t,n){return void 0===n&&(n={}),i(this,void 0,void 0,(function(){var r,i,s,u,a;return o(this,(function(o){switch(o.label){case 0:return"string"==typeof t?r=t:(r=t.url,i=dt(t)),[4,e.util.fetch(r,i)];case 1:return(s=o.sent()).ok?(a=Uint8Array.bind,[4,s.arrayBuffer()]):[3,3];case 2:return u=new(a.apply(Uint8Array,[void 0,o.sent()])),[2,new lt(u,n)];case 3:throw new Error(s.statusText)}}))}))}var dt=function(t){return{method:t.method,headers:t.headers,body:t.body,mode:t.mode,credentials:t.credentials,cache:t.cache,redirect:t.redirect,referrer:t.referrer,integrity:t.integrity}};function pt(t){return"string"==typeof t&&"file://"===t.substr(0,7)}var vt=function(t){function n(e,n){void 0===n&&(n={});var r=t.call(this)||this;return r.input=e,r.options=n,r}return r(n,t),n.prototype.iterator=function(){return i(this,void 0,void 0,(function(){var t;return o(this,(function(n){return 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is no header line.");if(this.fullColumnNames&&t&&e.util.assert(t.length===this.fullColumnNames.length,(function(){return"The length of provided columnNames ("+a.fullColumnNames.length.toString()+") does not match the length of the header line read from file ("+t.length.toString()+")."})),this.fullColumnNames||(this.fullColumnNames=t),n=this.fullColumnNames.reduce((function(t,e){return t[e]=t[e]+1||1,t}),{}),r=Object.keys(n).filter((function(t){return n[t]>1})),e.util.assert(0===r.length,(function(){return"Duplicate column names found: "+r.toString()})),this.columnConfigs)for(i=0,s=Object.keys(this.columnConfigs);i<s.length;i++)if(u=s[i],-1===this.fullColumnNames.indexOf(u))throw new Error('The key "'+u+'" provided in columnConfigs does not match any of the column names ('+this.fullColumnNames.toString()+").");return this.columnNamesValidated=!0,[2]}}))}))},n.prototype.maybeReadHeaderLine=function(){return i(this,void 0,void 0,(function(){var t,e;return o(this,(function(n){switch(n.label){case 0:return this.hasHeader?[4,this.base.iterator()]:[3,3];case 1:return[4,n.sent().next()];case 2:if((t=n.sent()).done)throw new Error("No data was found for CSV parsing.");return e=t.value,[2,this.parseRow(e,!1)];case 3:return[2,null]}}))}))},n.prototype.iterator=function(){return i(this,void 0,void 0,(function(){var t,e=this;return o(this,(function(n){switch(n.label){case 0:return this.columnNamesValidated?[3,2]:[4,this.setColumnNames()];case 1:n.sent(),n.label=2;case 2:return[4,this.base.iterator()];case 3:return t=n.sent(),this.hasHeader&&(t=t.skip(1)),[2,t.map((function(t){return e.makeDataElement(t)}))]}}))}))},n.prototype.makeDataElement=function(t){for(var e=this.parseRow(t),n={},r={},i=0;i<this.fullColumnNames.length;i++){var o=this.fullColumnNames[i],s=this.columnConfigs?this.columnConfigs[o]:null;if(!this.configuredColumnsOnly||s){var u=e[i],a=null;if(""===u)if(s&&void 0!==s.default)a=s.default;else{if(s&&(s.required||s.isLabel))throw new Error("Required column "+o+" is empty in this line: "+t);a=void 0}else{var c=Number(u);if(isNaN(c))a=s&&"bool"===s.dtype?this.getBoolean(u):u;else if(s&&s.dtype)switch(s.dtype){case"float32":a=c;break;case"int32":a=Math.floor(c);break;case"bool":a=this.getBoolean(u);break;default:a=c}else a=c}s&&s.isLabel?r[o]=a:n[o]=a}}return 0===Object.keys(r).length?n:{xs:n,ys:r}},n.prototype.getBoolean=function(t){return"1"===t||"true"===t.toLowerCase()?1:0},n.prototype.parseRow=function(t,e){void 0===e&&(e=!0);for(var n=[],r=0,i=t.length,o=J,s=0;s<i;s++)switch(o){case J:switch(t.charAt(s)){case Z:r=s+1,o=K;break;case this.delimiter:if(r=s+1," "===this.delimiter&&this.delimWhitespace)break;n.push(""),o=J;break;default:o=Y,r=s}break;case Y:switch(t.charAt(s)){case this.delimiter:n.push(t.substring(r,s)),o=J,r=s+1}break;case K:switch(t.charAt(s)){case Z:o=$}break;case $:switch(t.charAt(s)){case this.delimiter:n.push(t.substring(r,s-1)),o=J,r=s+1;break;case Z:o=K;break;default:o=tt}break;case tt:switch(t.charAt(s)){case Z:o=K}}if(o===$?n.push(t.substring(r,i-1)):n.push(t.substring(r)),e&&n.length!==this.fullColumnNames.length)throw new Error("Invalid row in csv file. Should have "+this.fullColumnNames.length+" elements in a row, but got "+n);return n},n}(U),nt=function(t){function n(e){var n=t.call(this)||this;n.microphoneConfig=e,n.isClosed=!1,n.fftSize=e.fftSize||1024;var r=Math.log2(n.fftSize);if(n.fftSize<0||r<4||r>14||!Number.isInteger(r))throw new Error("Invalid fftSize: it must be a power of 2 between 2 to 4 and 2 to 14, but got "+n.fftSize);if(n.numFrames=e.numFramesPerSpectrogram||43,n.sampleRateHz=e.sampleRateHz,n.columnTruncateLength=e.columnTruncateLength||n.fftSize,n.audioTrackConstraints=e.audioTrackConstraints,n.smoothingTimeConstant=e.smoothingTimeConstant||0,n.includeSpectrogram=!1!==e.includeSpectrogram,n.includeWaveform=!0===e.includeWaveform,!n.includeSpectrogram&&!n.includeWaveform)throw new Error("Both includeSpectrogram and includeWaveform are false. At least one type of data should be returned.");return n}return r(n,t),n.prototype.summary=function(){return"microphone"},n.create=function(t){return void 0===t&&(t={}),i(this,void 0,void 0,(function(){var r;return o(this,(function(i){switch(i.label){case 0:if(e.env().get("IS_NODE"))throw new Error("microphone API is only supported in browser environment.");return[4,(r=new n(t)).start()];case 1:return i.sent(),[2,r]}}))}))},n.prototype.start=function(){return i(this,void 0,void 0,(function(){var t,e,n,r;return o(this,(function(i){switch(i.label){case 0:return i.trys.push([0,2,,3]),t=this,[4,navigator.mediaDevices.getUserMedia({audio:null==this.audioTrackConstraints||this.audioTrackConstraints,video:!1})];case 1:return t.stream=i.sent(),[3,3];case 2:throw e=i.sent(),new Error("Error thrown while initializing video stream: "+e.message);case 3:if(!this.stream)throw new Error("Could not obtain audio from microphone.");if(n=window.AudioContext||window.webkitAudioContext,this.audioContext=new n,this.sampleRateHz){if(this.audioContext.sampleRate!==this.sampleRateHz)throw new Error("Mismatch in sampling rate: Expected: "+this.sampleRateHz+"; Actual: "+this.audioContext.sampleRate)}else this.sampleRateHz=this.audioContext.sampleRate;return r=this.audioContext.createMediaStreamSource(this.stream),this.analyser=this.audioContext.createAnalyser(),this.analyser.fftSize=2*this.fftSize,this.analyser.smoothingTimeConstant=this.smoothingTimeConstant,r.connect(this.analyser),this.freqData=new Float32Array(this.fftSize),this.timeData=new Float32Array(this.fftSize),[2]}}))}))},n.prototype.next=function(){return i(this,void 0,void 0,(function(){var t,e,n,r,i;return o(this,(function(o){switch(o.label){case 0:return this.isClosed?[2,{value:null,done:!0}]:[4,this.getAudioData()];case 1:return n=o.sent(),this.includeSpectrogram&&(r=this.flattenQueue(n.freqDataQueue),t=this.getTensorFromAudioDataArray(r,[this.numFrames,this.columnTruncateLength,1])),this.includeWaveform&&(i=this.flattenQueue(n.timeDataQueue),e=this.getTensorFromAudioDataArray(i,[this.numFrames*this.fftSize,1])),[2,{value:{spectrogram:t,waveform:e},done:!1}]}}))}))},n.prototype.capture=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){switch(t.label){case 0:return[4,this.next()];case 1:return[2,t.sent().value]}}))}))},n.prototype.getAudioData=function(){return i(this,void 0,void 0,(function(){var t,e,n,r=this;return o(this,(function(i){return t=[],e=[],n=0,[2,new Promise((function(i){var o=setInterval((function(){r.includeSpectrogram&&(r.analyser.getFloatFrequencyData(r.freqData),r.freqData[0]===-1/0&&i({freqDataQueue:t,timeDataQueue:e}),t.push(r.freqData.slice(0,r.columnTruncateLength))),r.includeWaveform&&(r.analyser.getFloatTimeDomainData(r.timeData),e.push(r.timeData.slice())),++n===r.numFrames&&(clearInterval(o),i({freqDataQueue:t,timeDataQueue:e}))}),r.fftSize/r.sampleRateHz*1e3)}))]}))}))},n.prototype.stop=function(){this.isClosed||(this.isClosed=!0,this.analyser.disconnect(),this.audioContext.close(),null!=this.stream&&this.stream.getTracks().length>0&&this.stream.getTracks()[0].stop())},n.prototype.toArray=function(){throw new Error("Can not convert infinite audio stream to array.")},n.prototype.getSampleRate=function(){return this.sampleRateHz},n.prototype.flattenQueue=function(t){var e=t[0].length,n=new Float32Array(t.length*e);return t.forEach((function(t,r){return n.set(t,r*e)})),n},n.prototype.getTensorFromAudioDataArray=function(t,n){var r=new Float32Array(e.util.sizeFromShape(n));return r.set(t,r.length-t.length),e.tensor(r,n)},n}(T),rt=function(t){function n(n,r){var i=t.call(this)||this;if(i.webcamVideoElement=n,i.webcamConfig=r,i.isClosed=!0,i.resize=!1,i.needToResize())if(i.resize=!0,i.cropSize=[i.webcamConfig.resizeHeight,i.webcamConfig.resizeWidth],i.cropBoxInd=e.tensor1d([0],"int32"),i.webcamConfig.centerCrop){var o=1*i.webcamConfig.resizeWidth/i.webcamVideoElement.width,s=1*i.webcamConfig.resizeHeight/i.webcamVideoElement.height,u=(1-o)/2,a=(1-s)/2,c=u+o,h=s+a;i.cropBox=e.tensor2d([a,u,h,c],[1,4])}else i.cropBox=e.tensor2d([0,0,1,1],[1,4]);return i}return r(n,t),n.prototype.summary=function(){return"webcam"},n.create=function(t,r){return void 0===r&&(r={}),i(this,void 0,void 0,(function(){var i;return o(this,(function(o){switch(o.label){case 0:if(e.env().get("IS_NODE"))throw new Error("tf.data.webcam is only supported in browser environment.");if(!t){if(t=document.createElement("video"),!r.resizeWidth||!r.resizeHeight)throw new Error("Please provide webcam video element, or resizeWidth and resizeHeight to create a hidden video element.");t.width=r.resizeWidth,t.height=r.resizeHeight}return[4,(i=new n(t,r)).start()];case 1:return o.sent(),[2,i]}}))}))},n.prototype.start=function(){return i(this,void 0,void 0,(function(){var t,n,r=this;return o(this,(function(i){switch(i.label){case 0:this.webcamConfig.facingMode&&e.util.assert("user"===this.webcamConfig.facingMode||"environment"===this.webcamConfig.facingMode,(function(){return"Invalid webcam facing mode: "+r.webcamConfig.facingMode+". Please provide 'user' or 'environment'"})),i.label=1;case 1:return i.trys.push([1,3,,4]),t=this,[4,navigator.mediaDevices.getUserMedia({video:{deviceId:this.webcamConfig.deviceId,facingMode:this.webcamConfig.facingMode?this.webcamConfig.facingMode:"user",width:this.webcamVideoElement.width,height:this.webcamVideoElement.height}})];case 2:return t.stream=i.sent(),[3,4];case 3:throw(n=i.sent()).message="Error thrown while initializing video stream: "+n.message,n;case 4:if(!this.stream)throw new Error("Could not obtain video from webcam.");try{this.webcamVideoElement.srcObject=this.stream}catch(t){console.log(t),this.webcamVideoElement.src=window.URL.createObjectURL(this.stream)}return this.webcamVideoElement.play(),this.isClosed=!1,[2,new Promise((function(t){r.webcamVideoElement.onloadedmetadata=function(){t()}}))]}}))}))},n.prototype.next=function(){return i(this,void 0,void 0,(function(){var t;return o(this,(function(n){if(this.isClosed)return[2,{value:null,done:!0}];try{t=e.browser.fromPixels(this.webcamVideoElement)}catch(t){throw new Error("Error thrown converting video to pixels: "+JSON.stringify(t))}if(!this.resize)return[2,{value:t,done:!1}];try{return[2,{value:this.cropAndResizeFrame(t),done:!1}]}catch(t){throw new Error("Error thrown cropping the video: "+t.message)}finally{t.dispose()}return[2]}))}))},n.prototype.needToResize=function(){return!(!this.webcamConfig.resizeWidth||!this.webcamConfig.resizeHeight||this.webcamVideoElement.width===this.webcamConfig.resizeWidth&&this.webcamVideoElement.height===this.webcamConfig.resizeHeight)},n.prototype.cropAndResizeFrame=function(t){var n=this;return e.tidy((function(){var r,i=e.expandDims(e.cast(t,"float32"),0),o=(r=e.image.cropAndResize(i,n.cropBox,n.cropBoxInd,n.cropSize,"bilinear")).shape;return e.reshape(r,o.slice(1))}))},n.prototype.capture=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){switch(t.label){case 0:return[4,this.next()];case 1:return[2,t.sent().value]}}))}))},n.prototype.stop=function(){this.stream.getTracks().forEach((function(t){return t.stop()}));try{this.webcamVideoElement.srcObject=null}catch(t){console.log(t),this.webcamVideoElement.src=null}this.isClosed=!0},n.prototype.toArray=function(){throw new Error("Can not convert infinite video stream to array.")},n}(T),it=function(){},ot=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return r(e,t),e.prototype.split=function(t){return new st(this,t)},e}(T),st=function(t){function e(e,n){var r=t.call(this)||this;return r.upstream=e,r.impl=new ut(e,n),r}return r(e,t),e.prototype.summary=function(){return this.impl.summary()},e.prototype.next=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){return[2,this.impl.next()]}))}))},e}(ot),ut=function(t){function e(e,n){var r=t.call(this)||this;return r.upstream=e,r.separator=n,r.carryover="",r}return r(e,t),e.prototype.summary=function(){return this.upstream.summary()+" -> Split('"+this.separator+"')"},e.prototype.pump=function(){return i(this,void 0,void 0,(function(){var t,e,n,r,i;return o(this,(function(o){switch(o.label){case 0:return[4,this.upstream.next()];case 1:if((t=o.sent()).done)return""===this.carryover?[2,!1]:(this.outputQueue.push(this.carryover),this.carryover="",[2,!0]);for((e=t.value.split(this.separator))[0]=this.carryover+e[0],n=0,r=e.slice(0,-1);n<r.length;n++)i=r[n],this.outputQueue.push(i);return this.carryover=e[e.length-1],[2,!0]}}))}))},e}(q),at=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return r(e,t),e.prototype.decodeUTF8=function(){return new ct(this)},e}(T),ct=function(t){function e(e){var n=t.call(this)||this;return n.upstream=e,n.impl=new ht(e),n}return r(e,t),e.prototype.summary=function(){return this.impl.summary()},e.prototype.next=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){return[2,this.impl.next()]}))}))},e}(ot),ht=function(t){function n(n){var r=t.call(this)||this;if(r.upstream=n,e.env().get("IS_BROWSER"))r.decoder=new TextDecoder("utf-8");else{var i=require("string_decoder").StringDecoder;r.decoder=new i("utf8")}return r}return r(n,t),n.prototype.summary=function(){return this.upstream.summary()+" -> Utf8"},n.prototype.pump=function(){return i(this,void 0,void 0,(function(){var t,n,r;return o(this,(function(i){switch(i.label){case 0:return[4,this.upstream.next()];case 1:return(t=i.sent()).done?[2,!1]:(n=t.value,r=e.env().get("IS_BROWSER")?this.decoder.decode(n,{stream:!0}):this.decoder.write(Buffer.from(n.buffer)),this.outputQueue.push(r),[2,!0])}}))}))},n}(q),lt=function(t){function n(n,r){void 0===r&&(r={});var i=t.call(this)||this;return i.file=n,i.options=r,e.util.assert(n instanceof Uint8Array||!!e.env().get("IS_BROWSER")&&(n instanceof File||n instanceof Blob),(function(){return"FileChunkIterator only supports File, Blob and Uint8Array right now."})),i.offset=r.offset||0,i.chunkSize=r.chunkSize||1048576,i}return r(n,t),n.prototype.summary=function(){return"FileChunks "+this.file},n.prototype.next=function(){return i(this,void 0,void 0,(function(){var t,e,n=this;return o(this,(function(r){switch(r.label){case 0:return this.offset>=(this.file instanceof Uint8Array?this.file.byteLength:this.file.size)?[2,{value:null,done:!0}]:(t=new Promise((function(t,e){var r=n.offset+n.chunkSize;if(n.file instanceof Uint8Array)t(new Uint8Array(n.file.slice(n.offset,r)));else{var i=new FileReader;i.onload=function(n){var r=i.result;if(r instanceof ArrayBuffer&&(r=new Uint8Array(r)),!(r instanceof Uint8Array))return e(new TypeError("FileReader returned unknown type."));t(r)},i.onabort=function(t){return e(new Error("Aborted"))},i.onerror=function(t){return e(new Error(t.type))};var o=n.file.slice(n.offset,r);i.readAsArrayBuffer(o)}n.offset=r})),e={},[4,t]);case 1:return[2,(e.value=r.sent(),e.done=!1,e)]}}))}))},n}(at);function ft(t,n){return void 0===n&&(n={}),i(this,void 0,void 0,(function(){var r,i,s,u,a;return o(this,(function(o){switch(o.label){case 0:return"string"==typeof t?r=t:(r=t.url,i=dt(t)),[4,e.util.fetch(r,i)];case 1:return(s=o.sent()).ok?(a=Uint8Array.bind,[4,s.arrayBuffer()]):[3,3];case 2:return u=new(a.apply(Uint8Array,[void 0,o.sent()])),[2,new lt(u,n)];case 3:throw new Error(s.statusText)}}))}))}var dt=function(t){return{method:t.method,headers:t.headers,body:t.body,mode:t.mode,credentials:t.credentials,cache:t.cache,redirect:t.redirect,referrer:t.referrer,integrity:t.integrity}};function pt(t){return"string"==typeof t&&"file://"===t.substr(0,7)}var vt=function(t){function n(e,n){void 0===n&&(n={});var r=t.call(this)||this;return r.input=e,r.options=n,r}return r(n,t),n.prototype.iterator=function(){return i(this,void 0,void 0,(function(){var t;return o(this,(function(n){return pt(this.input)&&e.env().get("IS_NODE")&&(t=require("fs"),this.input=t.readFileSync(this.input.substr(7))),[2,new lt(this.input,this.options)]}))}))},n}(it),mt=function(t){function e(e,n){void 0===n&&(n={});var r=t.call(this)||this;return r.url=e,r.fileOptions=n,r}return r(e,t),e.prototype.iterator=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){return pt(this.url)?[2,new vt(this.url,this.fileOptions).iterator()]:[2,ft(this.url,this.fileOptions)]}))}))},e}(it);t.CSVDataset=et,t.Dataset=U,t.FileDataSource=vt,t.TextLineDataset=G,t.URLDataSource=mt,t.array=function(t){var e=this;return Q((function(){return i(e,void 0,void 0,(function(){return o(this,(function(e){return[2,S(t)]}))}))}),t.length)},t.csv=function(t,e){return void 0===e&&(e={}),new et(new mt(t),e)},t.func=function(t){var e=this,n=A(t);return Q((function(){return i(e,void 0,void 0,(function(){return o(this,(function(t){return[2,n]}))}))}))},t.generator=function(t){var e=this;return Q((function(){return i(e,void 0,void 0,(function(){var e;return o(this,(function(n){switch(n.label){case 0:return[4,t()];case 1:return e=n.sent(),[2,A((function(){return e.next()}))]}}))}))}))},t.microphone=function(t){return i(this,void 0,void 0,(function(){return o(this,(function(e){return[2,nt.create(t)]}))}))},t.version_data="3.6.0",t.webcam=function(t,e){return i(this,void 0,void 0,(function(){return o(this,(function(n){return[2,rt.create(t,e)]}))}))},t.zip=function(t){var e,n=this;if(!g(t))throw new Error("The argument to zip() must be an object or array.");if(Array.isArray(t))for(var r=0;r<t.length;r++)e=null==e?t[r].size:Math.min(e,t[r].size);else if(t instanceof Object)for(var s in t)e=null==e?t[s].size:Math.min(e,t[s].size);return Q((function(){return i(n,void 0,void 0,(function(){var e;return o(this,(function(n){switch(n.label){case 0:return[4,b(t,(function(t){if(t instanceof U)return{value:t.iterator(),recurse:!1};if(g(t))return{value:null,recurse:!0};throw new Error("Leaves of the structure passed to zip() must be Datasets, not primitives.")}))];case 1:return e=n.sent(),[2,(r=e,i=R.SHORTEST,void 0===i&&(i=R.FAIL),new P(r,i))]}var r,i}))}))}),e)},Object.defineProperty(t,"__esModule",{value:!0})}));
 //# sourceMappingURL=tf-data.min.js.map

dist/tf-data.es2017.min.js

@@ -17,3 +17,3 @@ /**
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r)e.tensor_util.isTensorInList(t,n)||t.dispose();return!0}}class j extends E{constructor(t,e){super(),this.baseErrorHandler=e,this.lastRead=null,this.iterator=null,this.moreIterators=t}summary(){return"TODO: fill in upstream of chained summaries -> Chained"}async next(){return this.lastRead=this.readFromChain(this.lastRead),this.lastRead}async readFromChain(t){if(await t,null==this.iterator){const t=await this.moreIterators.next();if(t.done)return{value:null,done:!0};this.iterator=t.value,null!=this.baseErrorHandler&&(this.iterator=this.iterator.handleErrors(this.baseErrorHandler))}const e=await this.iterator.next();return e.done?(this.iterator=null,this.readFromChain(t)):e}}!function(t){t[t.FAIL=0]="FAIL",t[t.SHORTEST=1]="SHORTEST",t[t.LONGEST=2]="LONGEST"}(l||(l={}));class L extends E{constructor(t,e=l.FAIL){super(),this.iterators=t,this.mismatchMode=e,this.count=0,this.currentPromise=null}summary(){return"{TODO: fill in upstream of zip summaries} -> Zip"}async nextState(t){await t;let e=0,r=0;const s=await w(this.iterators,(function(t){if(t instanceof E){return{value:t.next().then((t=>(e++,t.done&&r++,t.value))),recurse:!1}}return{value:null,recurse:!0}}));if(e===r)return{value:null,done:!0};if(r>0)switch(this.mismatchMode){case l.FAIL:throw new Error(`Zipped streams should have the same length. Mismatched at element ${this.count}.`);case l.SHORTEST:return{value:null,done:!0};case l.LONGEST:}return this.count++,{value:s,done:!1}}async next(){return this.currentPromise=this.nextState(this.currentPromise),this.currentPromise}}class q extends E{constructor(t,e){super(),this.upstream=t,this.bufferSize=e,this.buffer=new v(e)}summary(){return`${this.upstream.summary()} -> Prefetch`}refill(){for(;!this.buffer.isFull();){const t=this.upstream.next();this.buffer.push(t)}}next(){return this.refill(),this.buffer.shift()}}class H extends q{constructor(t,r,s){super(t,r),this.upstream=t,this.windowSize=r,this.upstreamExhausted=!1,this.random=c(s||e.util.now().toString()),this.lastRead=Promise.resolve({value:null,done:!1})}async next(){return this.lastRead=this.lastRead.then((()=>this.serialNext())),this.lastRead}randomInt(t){return Math.floor(this.random()*t)}chooseIndex(){return this.randomInt(this.buffer.length())}async serialNext(){for(this.upstreamExhausted||this.refill();!this.buffer.isEmpty();){const t=this.chooseIndex(),e=await this.buffer.shuffleExcise(t);if(!e.done)return this.refill(),e;this.upstreamExhausted=!0}return{value:null,done:!0}}}class B{constructor(){this.size=null}batch(t,r=!0){const s=this;let n;return e.util.assert(t>0,(()=>`batchSize needs to be positive, but it is\n      ${t}`)),n=this.size===1/0||null==this.size?this.size:r?Math.ceil(this.size/t):Math.floor(this.size/t),P((async()=>(await s.iterator()).columnMajorBatch(t,r,W)),n)}concatenate(t){const e=this;let r;return r=this.size===1/0||t.size===1/0?1/0:null!=this.size&&null!=t.size?this.size+t.size:null,P((async()=>(await e.iterator()).concatenate(await t.iterator())),r)}filter(t){const r=this;let s;return s=this.size===1/0?1/0:null,P((async()=>(await r.iterator()).filter((r=>e.tidy((()=>t(r)))))),s)}async forEachAsync(t){return(await this.iterator()).forEachAsync(t)}map(t){const r=this;return P((async()=>(await r.iterator()).map((r=>e.tidy((()=>t(r)))))),this.size)}mapAsync(t){const e=this;return P((async()=>(await e.iterator()).mapAsync(t)),this.size)}prefetch(t){if(null==t)throw new RangeError("`Dataset.prefetch()` requires bufferSize to be specified.");const e=this;return P((async()=>(await e.iterator()).prefetch(t)),this.size)}repeat(t){const e=this;let r;return r=null!=this.size&&t>0?this.size*t:0===t?0:null!=this.size&&(void 0===t||t<0)?1/0:null,P((async()=>{const r=z((async()=>({value:await e.iterator(),done:!1})));return s=r.take(t),new j(s,n);var s,n}),r)}skip(t){const e=this;let r;return r=null!=this.size&&t>=0&&this.size>=t?this.size-t:null!=this.size&&(this.size<t||void 0===t||t<0)?0:null,P((async()=>(await e.iterator()).skip(t)),r)}shuffle(t,r,s=!0){if(null==t||t<0)throw null==this.size?new RangeError("`Dataset.shuffle()` requires bufferSize to be specified."):new RangeError(`\`Dataset.shuffle()\` requires bufferSize to be specified.  If your data fits in main memory (for regular JS objects), and/or GPU memory (for \`tf.Tensor\`s), consider setting bufferSize to the dataset size (${this.size} elements)`);const n=this,i=c(r||e.util.now().toString());return P((async()=>{let e=i.int32();return s&&(e+=i.int32()),(await n.iterator()).shuffle(t,e.toString())}),this.size)}take(t){const e=this;let r;return r=null!=this.size&&this.size>t?t:null!=this.size&&this.size<=t?this.size:null,P((async()=>(await e.iterator()).take(t)),r)}async toArray(){if(this.size===1/0)throw new Error("Can not convert infinite data stream to array.");return(await this.iterator()).toArray()}async toArrayForTest(){if(this.size===1/0)throw new Error("Can not convert infinite data stream to array.");return(await this.iterator()).toArrayForTest()}}function P(t,e=null){return new class extends B{constructor(){super(...arguments),this.size=e}async iterator(){return t()}}}function W(t){if(null===t)return null;const r=t[0];if(null==(s=r)||null===(n=s)||"object"!=typeof n&&"function"!=typeof n||Array.isArray(s)||"object"==typeof s&&s instanceof e.Tensor||e.util.isTypedArray(s)){return{value:function(t){if(0===t.length)throw new Error("Can't make a batch of zero elements.");return t[0]instanceof e.Tensor?e.stack(t):e.tensor(t)}(t),recurse:!1}}var s,n;return{value:null,recurse:!0}}B.MAX_BUFFER_SIZE=1e4;class _ extends B{constructor(t){super(),this.input=t}async iterator(){return(await this.input.iterator()).decodeUTF8().split("\n").map((t=>(t.endsWith("\r")&&(t=t.slice(0,-1)),t)))}}const V='"',U=Symbol("out"),Q=Symbol("field"),X=Symbol("quote"),G=Symbol("quoteafterquote"),Z=Symbol("quoteinquote");class J extends B{constructor(t,r){super(),this.input=t,this.hasHeader=!0,this.fullColumnNames=null,this.columnNamesValidated=!1,this.columnConfigs=null,this.configuredColumnsOnly=!1,this.delimiter=",",this.delimWhitespace=!1,this.base=new _(t),r||(r={}),this.hasHeader=!1!==r.hasHeader,this.fullColumnNames=r.columnNames,this.columnConfigs=r.columnConfigs,this.configuredColumnsOnly=r.configuredColumnsOnly,r.delimWhitespace?(e.util.assert(null==r.delimiter,(()=>"Delimiter should not be provided when delimWhitespace is true.")),this.delimWhitespace=!0,this.delimiter=" "):this.delimiter=r.delimiter?r.delimiter:","}async columnNames(){return this.columnNamesValidated||await this.setColumnNames(),this.configuredColumnsOnly?Object.keys(this.columnConfigs):this.fullColumnNames}async setColumnNames(){const t=await this.maybeReadHeaderLine();if(!this.fullColumnNames&&!t)throw new Error("Column names must be provided if there is no header line.");this.fullColumnNames&&t&&e.util.assert(t.length===this.fullColumnNames.length,(()=>"The length of provided columnNames ("+this.fullColumnNames.length.toString()+") does not match the length of the header line read from file ("+t.length.toString()+").")),this.fullColumnNames||(this.fullColumnNames=t);const r=this.fullColumnNames.reduce(((t,e)=>(t[e]=t[e]+1||1,t)),{}),s=Object.keys(r).filter((t=>r[t]>1));if(e.util.assert(0===s.length,(()=>"Duplicate column names found: "+s.toString())),this.columnConfigs)for(const t of Object.keys(this.columnConfigs)){if(-1===this.fullColumnNames.indexOf(t))throw new Error('The key "'+t+'" provided in columnConfigs does not match any of the column names ('+this.fullColumnNames.toString()+").")}this.columnNamesValidated=!0}async maybeReadHeaderLine(){if(this.hasHeader){const t=await this.base.iterator(),e=await t.next();if(e.done)throw new Error("No data was found for CSV parsing.");const r=e.value;return this.parseRow(r,!1)}return null}async iterator(){this.columnNamesValidated||await this.setColumnNames();let t=await this.base.iterator();return this.hasHeader&&(t=t.skip(1)),t.map((t=>this.makeDataElement(t)))}makeDataElement(t){const e=this.parseRow(t),r={},s={};for(let n=0;n<this.fullColumnNames.length;n++){const i=this.fullColumnNames[n],a=this.columnConfigs?this.columnConfigs[i]:null;if(!this.configuredColumnsOnly||a){const o=e[n];let u=null;if(""===o)if(a&&void 0!==a.default)u=a.default;else{if(a&&(a.required||a.isLabel))throw new Error(`Required column ${i} is empty in this line: ${t}`);u=void 0}else{const t=Number(o);if(isNaN(t))u=a&&"bool"===a.dtype?this.getBoolean(o):o;else if(a&&a.dtype)switch(a.dtype){case"float32":u=t;break;case"int32":u=Math.floor(t);break;case"bool":u=this.getBoolean(o);break;default:u=t}else u=t}a&&a.isLabel?s[i]=u:r[i]=u}}return 0===Object.keys(s).length?r:{xs:r,ys:s}}getBoolean(t){return"1"===t||"true"===t.toLowerCase()?1:0}parseRow(t,e=!0){const r=[];let s=0;const n=t.length;let i=U;for(let e=0;e<n;e++)switch(i){case U:switch(t.charAt(e)){case V:s=e+1,i=X;break;case this.delimiter:if(s=e+1," "===this.delimiter&&this.delimWhitespace)break;r.push(""),i=U;break;default:i=Q,s=e}break;case Q:switch(t.charAt(e)){case this.delimiter:r.push(t.substring(s,e)),i=U,s=e+1}break;case X:switch(t.charAt(e)){case V:i=G}break;case G:switch(t.charAt(e)){case this.delimiter:r.push(t.substring(s,e-1)),i=U,s=e+1;break;case V:i=X;break;default:i=Z}break;case Z:switch(t.charAt(e)){case V:i=X}}if(i===G?r.push(t.substring(s,n-1)):r.push(t.substring(s)),e&&r.length!==this.fullColumnNames.length)throw new Error(`Invalid row in csv file. Should have ${this.fullColumnNames.length} elements in a row, but got ${r}`);return r}}class Y extends E{constructor(t){super(),this.microphoneConfig=t,this.isClosed=!1,this.fftSize=t.fftSize||1024;const e=Math.log2(this.fftSize);if(this.fftSize<0||e<4||e>14||!Number.isInteger(e))throw new Error(`Invalid fftSize: it must be a power of 2 between 2 to 4 and 2 to 14, but got ${this.fftSize}`);if(this.numFrames=t.numFramesPerSpectrogram||43,this.sampleRateHz=t.sampleRateHz,this.columnTruncateLength=t.columnTruncateLength||this.fftSize,this.audioTrackConstraints=t.audioTrackConstraints,this.smoothingTimeConstant=t.smoothingTimeConstant||0,this.includeSpectrogram=!1!==t.includeSpectrogram,this.includeWaveform=!0===t.includeWaveform,!this.includeSpectrogram&&!this.includeWaveform)throw new Error("Both includeSpectrogram and includeWaveform are false. At least one type of data should be returned.")}summary(){return"microphone"}static async create(t={}){if(e.env().get("IS_NODE"))throw new Error("microphone API is only supported in browser environment.");const r=new Y(t);return await r.start(),r}async start(){try{this.stream=await navigator.mediaDevices.getUserMedia({audio:null==this.audioTrackConstraints||this.audioTrackConstraints,video:!1})}catch(t){throw new Error(`Error thrown while initializing video stream: ${t.message}`)}if(!this.stream)throw new Error("Could not obtain audio from microphone.");const t=window.AudioContext||window.webkitAudioContext;if(this.audioContext=new t,this.sampleRateHz){if(this.audioContext.sampleRate!==this.sampleRateHz)throw new Error(`Mismatch in sampling rate: Expected: ${this.sampleRateHz}; Actual: ${this.audioContext.sampleRate}`)}else this.sampleRateHz=this.audioContext.sampleRate;const e=this.audioContext.createMediaStreamSource(this.stream);this.analyser=this.audioContext.createAnalyser(),this.analyser.fftSize=2*this.fftSize,this.analyser.smoothingTimeConstant=this.smoothingTimeConstant,e.connect(this.analyser),this.freqData=new Float32Array(this.fftSize),this.timeData=new Float32Array(this.fftSize)}async next(){if(this.isClosed)return{value:null,done:!0};let t,e;const r=await this.getAudioData();if(this.includeSpectrogram){const e=this.flattenQueue(r.freqDataQueue);t=this.getTensorFromAudioDataArray(e,[this.numFrames,this.columnTruncateLength,1])}if(this.includeWaveform){const t=this.flattenQueue(r.timeDataQueue);e=this.getTensorFromAudioDataArray(t,[this.numFrames*this.fftSize,1])}return{value:{spectrogram:t,waveform:e},done:!1}}async capture(){return(await this.next()).value}async getAudioData(){const t=[],e=[];let r=0;return new Promise((s=>{const n=setInterval((()=>{this.includeSpectrogram&&(this.analyser.getFloatFrequencyData(this.freqData),this.freqData[0]===-1/0&&s({freqDataQueue:t,timeDataQueue:e}),t.push(this.freqData.slice(0,this.columnTruncateLength))),this.includeWaveform&&(this.analyser.getFloatTimeDomainData(this.timeData),e.push(this.timeData.slice())),++r===this.numFrames&&(clearInterval(n),s({freqDataQueue:t,timeDataQueue:e}))}),this.fftSize/this.sampleRateHz*1e3)}))}stop(){this.isClosed||(this.isClosed=!0,this.analyser.disconnect(),this.audioContext.close(),null!=this.stream&&this.stream.getTracks().length>0&&this.stream.getTracks()[0].stop())}toArray(){throw new Error("Can not convert infinite audio stream to array.")}getSampleRate(){return this.sampleRateHz}flattenQueue(t){const e=t[0].length,r=new Float32Array(t.length*e);return t.forEach(((t,s)=>r.set(t,s*e))),r}getTensorFromAudioDataArray(t,r){const s=new Float32Array(e.util.sizeFromShape(r));return s.set(t,s.length-t.length),e.tensor(s,r)}}class K extends E{constructor(t,r){if(super(),this.webcamVideoElement=t,this.webcamConfig=r,this.isClosed=!0,this.resize=!1,this.needToResize())if(this.resize=!0,this.cropSize=[this.webcamConfig.resizeHeight,this.webcamConfig.resizeWidth],this.cropBoxInd=e.tensor1d([0],"int32"),this.webcamConfig.centerCrop){const t=1*this.webcamConfig.resizeWidth/this.webcamVideoElement.width,r=1*this.webcamConfig.resizeHeight/this.webcamVideoElement.height,s=(1-t)/2,n=(1-r)/2,i=s+t,a=r+n;this.cropBox=e.tensor2d([n,s,a,i],[1,4])}else this.cropBox=e.tensor2d([0,0,1,1],[1,4])}summary(){return"webcam"}static async create(t,r={}){if(e.env().get("IS_NODE"))throw new Error("tf.data.webcam is only supported in browser environment.");if(!t){if(t=document.createElement("video"),!r.resizeWidth||!r.resizeHeight)throw new Error("Please provide webcam video element, or resizeWidth and resizeHeight to create a hidden video element.");t.width=r.resizeWidth,t.height=r.resizeHeight}const s=new K(t,r);return await s.start(),s}async start(){this.webcamConfig.facingMode&&e.util.assert("user"===this.webcamConfig.facingMode||"environment"===this.webcamConfig.facingMode,(()=>`Invalid webcam facing mode: ${this.webcamConfig.facingMode}. Please provide 'user' or 'environment'`));try{this.stream=await navigator.mediaDevices.getUserMedia({video:{deviceId:this.webcamConfig.deviceId,facingMode:this.webcamConfig.facingMode?this.webcamConfig.facingMode:"user",width:this.webcamVideoElement.width,height:this.webcamVideoElement.height}})}catch(t){throw t.message=`Error thrown while initializing video stream: ${t.message}`,t}if(!this.stream)throw new Error("Could not obtain video from webcam.");try{this.webcamVideoElement.srcObject=this.stream}catch(t){console.log(t),this.webcamVideoElement.src=window.URL.createObjectURL(this.stream)}return this.webcamVideoElement.play(),this.isClosed=!1,new Promise((t=>{this.webcamVideoElement.onloadedmetadata=()=>{t()}}))}async next(){if(this.isClosed)return{value:null,done:!0};let t;try{t=e.browser.fromPixels(this.webcamVideoElement)}catch(t){throw new Error(`Error thrown converting video to pixels: ${JSON.stringify(t)}`)}if(!this.resize)return{value:t,done:!1};try{return{value:this.cropAndResizeFrame(t),done:!1}}catch(t){throw new Error(`Error thrown cropping the video: ${t.message}`)}finally{t.dispose()}}needToResize(){return!(!this.webcamConfig.resizeWidth||!this.webcamConfig.resizeHeight||this.webcamVideoElement.width===this.webcamConfig.resizeWidth&&this.webcamVideoElement.height===this.webcamConfig.resizeHeight)}cropAndResizeFrame(t){return e.tidy((()=>{const r=e.expandDims(e.cast(t,"float32"),0);let s;s=e.image.cropAndResize(r,this.cropBox,this.cropBoxInd,this.cropSize,"bilinear");const n=s.shape;return e.reshape(s,n.slice(1))}))}async capture(){return(await this.next()).value}stop(){this.stream.getTracks().forEach((t=>t.stop()));try{this.webcamVideoElement.srcObject=null}catch(t){console.log(t),this.webcamVideoElement.src=null}this.isClosed=!0}toArray(){throw new Error("Can not convert infinite video stream to array.")}}class tt{}class et extends E{split(t){return new rt(this,t)}}class rt extends et{constructor(t,e){super(),this.upstream=t,this.impl=new st(t,e)}summary(){return this.impl.summary()}async next(){return this.impl.next()}}class st extends O{constructor(t,e){super(),this.upstream=t,this.separator=e,this.carryover=""}summary(){return`${this.upstream.summary()} -> Split('${this.separator}')`}async pump(){const t=await this.upstream.next();if(t.done)return""!==this.carryover&&(this.outputQueue.push(this.carryover),this.carryover="",!0);const e=t.value.split(this.separator);e[0]=this.carryover+e[0];for(const t of e.slice(0,-1))this.outputQueue.push(t);return this.carryover=e[e.length-1],!0}}class nt extends E{decodeUTF8(){return new it(this)}}class it extends et{constructor(t){super(),this.upstream=t,this.impl=new at(t)}summary(){return this.impl.summary()}async next(){return this.impl.next()}}class at extends O{constructor(t){if(super(),this.upstream=t,e.env().get("IS_BROWSER"))this.decoder=new TextDecoder("utf-8");else{const{StringDecoder:t}=require("string_decoder");this.decoder=new t("utf8")}}summary(){return`${this.upstream.summary()} -> Utf8`}async pump(){const t=await this.upstream.next();let r,s;return!t.done&&(r=t.value,s=e.env().get("IS_BROWSER")?this.decoder.decode(r,{stream:!0}):this.decoder.write(Buffer.from(r.buffer)),this.outputQueue.push(s),!0)}}class ot extends nt{constructor(t,r={}){super(),this.file=t,this.options=r,e.util.assert(t instanceof Uint8Array||!!e.env().get("IS_BROWSER")&&(t instanceof File||t instanceof Blob),(()=>"FileChunkIterator only supports File, Blob and Uint8Array right now.")),this.offset=r.offset||0,this.chunkSize=r.chunkSize||1048576}summary(){return`FileChunks ${this.file}`}async next(){if(this.offset>=(this.file instanceof Uint8Array?this.file.byteLength:this.file.size))return{value:null,done:!0};const t=new Promise(((t,e)=>{const r=this.offset+this.chunkSize;if(this.file instanceof Uint8Array)t(new Uint8Array(this.file.slice(this.offset,r)));else{const s=new FileReader;s.onload=r=>{let n=s.result;if(n instanceof ArrayBuffer&&(n=new Uint8Array(n)),!(n instanceof Uint8Array))return e(new TypeError("FileReader returned unknown type."));t(n)},s.onabort=t=>e(new Error("Aborted")),s.onerror=t=>e(new Error(t.type));const n=this.file.slice(this.offset,r);s.readAsArrayBuffer(n)}this.offset=r}));return{value:await t,done:!1}}}const ut=t=>({method:t.method,headers:t.headers,body:t.body,mode:t.mode,credentials:t.credentials,cache:t.cache,redirect:t.redirect,referrer:t.referrer,integrity:t.integrity});function ht(t){return"string"==typeof t&&"file://"===t.substr(0,7)}class lt extends tt{constructor(t,e={}){super(),this.input=t,this.options=e}async iterator(){if(ht(this.input)&&e.env().get("IS_NODE")){const t=require("fs");this.input=t.readFileSync(this.input.substr(7))}return new ot(this.input,this.options)}}class ct extends tt{constructor(t,e={}){super(),this.url=t,this.fileOptions=e}async iterator(){return ht(this.url)?new lt(this.url,this.fileOptions).iterator():async function(t,r={}){let s,n;"string"==typeof t?s=t:(s=t.url,n=ut(t));const i=await e.util.fetch(s,n);if(i.ok){const t=new Uint8Array(await i.arrayBuffer());return new ot(t,r)}throw new Error(i.statusText)}(this.url,this.fileOptions)}}t.CSVDataset=J,t.Dataset=B,t.FileDataSource=lt,t.TextLineDataset=_,t.URLDataSource=ct,t.array=function(t){return P((async()=>C(t)),t.length)},t.csv=function(t,e={}){return new J(new ct(t),e)},t.func=function(t){const e=z(t);return P((async()=>e))},t.generator=function(t){return P((async()=>{const e=await t();return z((()=>e.next()))}))},t.microphone=async function(t){return Y.create(t)},t.version_data="3.5.0",t.webcam=async function(t,e){return K.create(t,e)},t.zip=function(t){if(!y(t))throw new Error("The argument to zip() must be an object or array.");let e;if(Array.isArray(t))for(let r=0;r<t.length;r++)e=null==e?t[r].size:Math.min(e,t[r].size);else if(t instanceof 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r)e.tensor_util.isTensorInList(t,n)||t.dispose();return!0}}class j extends E{constructor(t,e){super(),this.baseErrorHandler=e,this.lastRead=null,this.iterator=null,this.moreIterators=t}summary(){return"TODO: fill in upstream of chained summaries -> Chained"}async next(){return this.lastRead=this.readFromChain(this.lastRead),this.lastRead}async readFromChain(t){if(await t,null==this.iterator){const t=await this.moreIterators.next();if(t.done)return{value:null,done:!0};this.iterator=t.value,null!=this.baseErrorHandler&&(this.iterator=this.iterator.handleErrors(this.baseErrorHandler))}const e=await this.iterator.next();return e.done?(this.iterator=null,this.readFromChain(t)):e}}!function(t){t[t.FAIL=0]="FAIL",t[t.SHORTEST=1]="SHORTEST",t[t.LONGEST=2]="LONGEST"}(l||(l={}));class L extends E{constructor(t,e=l.FAIL){super(),this.iterators=t,this.mismatchMode=e,this.count=0,this.currentPromise=null}summary(){return"{TODO: fill in upstream of zip summaries} -> Zip"}async nextState(t){await t;let e=0,r=0;const s=await w(this.iterators,(function(t){if(t instanceof E){return{value:t.next().then((t=>(e++,t.done&&r++,t.value))),recurse:!1}}return{value:null,recurse:!0}}));if(e===r)return{value:null,done:!0};if(r>0)switch(this.mismatchMode){case l.FAIL:throw new Error(`Zipped streams should have the same length. Mismatched at element ${this.count}.`);case l.SHORTEST:return{value:null,done:!0};case l.LONGEST:}return this.count++,{value:s,done:!1}}async next(){return this.currentPromise=this.nextState(this.currentPromise),this.currentPromise}}class q extends E{constructor(t,e){super(),this.upstream=t,this.bufferSize=e,this.buffer=new v(e)}summary(){return`${this.upstream.summary()} -> Prefetch`}refill(){for(;!this.buffer.isFull();){const t=this.upstream.next();this.buffer.push(t)}}next(){return this.refill(),this.buffer.shift()}}class H extends q{constructor(t,r,s){super(t,r),this.upstream=t,this.windowSize=r,this.upstreamExhausted=!1,this.random=c(s||e.util.now().toString()),this.lastRead=Promise.resolve({value:null,done:!1})}async next(){return this.lastRead=this.lastRead.then((()=>this.serialNext())),this.lastRead}randomInt(t){return Math.floor(this.random()*t)}chooseIndex(){return this.randomInt(this.buffer.length())}async serialNext(){for(this.upstreamExhausted||this.refill();!this.buffer.isEmpty();){const t=this.chooseIndex(),e=await this.buffer.shuffleExcise(t);if(!e.done)return this.refill(),e;this.upstreamExhausted=!0}return{value:null,done:!0}}}class B{constructor(){this.size=null}batch(t,r=!0){const s=this;let n;return e.util.assert(t>0,(()=>`batchSize needs to be positive, but it is\n      ${t}`)),n=this.size===1/0||null==this.size?this.size:r?Math.ceil(this.size/t):Math.floor(this.size/t),P((async()=>(await s.iterator()).columnMajorBatch(t,r,W)),n)}concatenate(t){const e=this;let r;return r=this.size===1/0||t.size===1/0?1/0:null!=this.size&&null!=t.size?this.size+t.size:null,P((async()=>(await e.iterator()).concatenate(await t.iterator())),r)}filter(t){const r=this;let s;return s=this.size===1/0?1/0:null,P((async()=>(await r.iterator()).filter((r=>e.tidy((()=>t(r)))))),s)}async forEachAsync(t){return(await this.iterator()).forEachAsync(t)}map(t){const r=this;return P((async()=>(await r.iterator()).map((r=>e.tidy((()=>t(r)))))),this.size)}mapAsync(t){const e=this;return P((async()=>(await e.iterator()).mapAsync(t)),this.size)}prefetch(t){if(null==t)throw new RangeError("`Dataset.prefetch()` requires bufferSize to be specified.");const e=this;return P((async()=>(await e.iterator()).prefetch(t)),this.size)}repeat(t){const e=this;let r;return r=null!=this.size&&t>0?this.size*t:0===t?0:null!=this.size&&(void 0===t||t<0)?1/0:null,P((async()=>{const r=z((async()=>({value:await e.iterator(),done:!1})));return s=r.take(t),new j(s,n);var s,n}),r)}skip(t){const e=this;let r;return r=null!=this.size&&t>=0&&this.size>=t?this.size-t:null!=this.size&&(this.size<t||void 0===t||t<0)?0:null,P((async()=>(await e.iterator()).skip(t)),r)}shuffle(t,r,s=!0){if(null==t||t<0)throw null==this.size?new RangeError("`Dataset.shuffle()` requires bufferSize to be specified."):new RangeError(`\`Dataset.shuffle()\` requires bufferSize to be specified.  If your data fits in main memory (for regular JS objects), and/or GPU memory (for \`tf.Tensor\`s), consider setting bufferSize to the dataset size (${this.size} elements)`);const n=this,i=c(r||e.util.now().toString());return P((async()=>{let e=i.int32();return s&&(e+=i.int32()),(await n.iterator()).shuffle(t,e.toString())}),this.size)}take(t){const e=this;let r;return r=null!=this.size&&this.size>t?t:null!=this.size&&this.size<=t?this.size:null,P((async()=>(await e.iterator()).take(t)),r)}async toArray(){if(this.size===1/0)throw new Error("Can not convert infinite data stream to array.");return(await this.iterator()).toArray()}async toArrayForTest(){if(this.size===1/0)throw new Error("Can not convert infinite data stream to array.");return(await this.iterator()).toArrayForTest()}}function P(t,e=null){return new class extends B{constructor(){super(...arguments),this.size=e}async iterator(){return t()}}}function W(t){if(null===t)return null;const r=t[0];if(null==(s=r)||null===(n=s)||"object"!=typeof n&&"function"!=typeof n||Array.isArray(s)||"object"==typeof s&&s instanceof e.Tensor||e.util.isTypedArray(s)){return{value:function(t){if(0===t.length)throw new Error("Can't make a batch of zero elements.");return t[0]instanceof e.Tensor?e.stack(t):e.tensor(t)}(t),recurse:!1}}var s,n;return{value:null,recurse:!0}}B.MAX_BUFFER_SIZE=1e4;class _ extends B{constructor(t){super(),this.input=t}async iterator(){return(await this.input.iterator()).decodeUTF8().split("\n").map((t=>(t.endsWith("\r")&&(t=t.slice(0,-1)),t)))}}const V='"',U=Symbol("out"),Q=Symbol("field"),X=Symbol("quote"),G=Symbol("quoteafterquote"),Z=Symbol("quoteinquote");class J extends B{constructor(t,r){super(),this.input=t,this.hasHeader=!0,this.fullColumnNames=null,this.columnNamesValidated=!1,this.columnConfigs=null,this.configuredColumnsOnly=!1,this.delimiter=",",this.delimWhitespace=!1,this.base=new _(t),r||(r={}),this.hasHeader=!1!==r.hasHeader,this.fullColumnNames=r.columnNames,this.columnConfigs=r.columnConfigs,this.configuredColumnsOnly=r.configuredColumnsOnly,r.delimWhitespace?(e.util.assert(null==r.delimiter,(()=>"Delimiter should not be provided when delimWhitespace is true.")),this.delimWhitespace=!0,this.delimiter=" "):this.delimiter=r.delimiter?r.delimiter:","}async columnNames(){return this.columnNamesValidated||await this.setColumnNames(),this.configuredColumnsOnly?Object.keys(this.columnConfigs):this.fullColumnNames}async setColumnNames(){const t=await this.maybeReadHeaderLine();if(!this.fullColumnNames&&!t)throw new Error("Column names must be provided if there is no header line.");this.fullColumnNames&&t&&e.util.assert(t.length===this.fullColumnNames.length,(()=>"The length of provided columnNames ("+this.fullColumnNames.length.toString()+") does not match the length of the header line read from file ("+t.length.toString()+").")),this.fullColumnNames||(this.fullColumnNames=t);const r=this.fullColumnNames.reduce(((t,e)=>(t[e]=t[e]+1||1,t)),{}),s=Object.keys(r).filter((t=>r[t]>1));if(e.util.assert(0===s.length,(()=>"Duplicate column names found: "+s.toString())),this.columnConfigs)for(const t of Object.keys(this.columnConfigs)){if(-1===this.fullColumnNames.indexOf(t))throw new Error('The key "'+t+'" provided in columnConfigs does not match any of the column names ('+this.fullColumnNames.toString()+").")}this.columnNamesValidated=!0}async maybeReadHeaderLine(){if(this.hasHeader){const t=await this.base.iterator(),e=await t.next();if(e.done)throw new Error("No data was found for CSV parsing.");const r=e.value;return this.parseRow(r,!1)}return null}async iterator(){this.columnNamesValidated||await this.setColumnNames();let t=await this.base.iterator();return this.hasHeader&&(t=t.skip(1)),t.map((t=>this.makeDataElement(t)))}makeDataElement(t){const e=this.parseRow(t),r={},s={};for(let n=0;n<this.fullColumnNames.length;n++){const i=this.fullColumnNames[n],a=this.columnConfigs?this.columnConfigs[i]:null;if(!this.configuredColumnsOnly||a){const o=e[n];let u=null;if(""===o)if(a&&void 0!==a.default)u=a.default;else{if(a&&(a.required||a.isLabel))throw new Error(`Required column ${i} is empty in this line: ${t}`);u=void 0}else{const t=Number(o);if(isNaN(t))u=a&&"bool"===a.dtype?this.getBoolean(o):o;else if(a&&a.dtype)switch(a.dtype){case"float32":u=t;break;case"int32":u=Math.floor(t);break;case"bool":u=this.getBoolean(o);break;default:u=t}else u=t}a&&a.isLabel?s[i]=u:r[i]=u}}return 0===Object.keys(s).length?r:{xs:r,ys:s}}getBoolean(t){return"1"===t||"true"===t.toLowerCase()?1:0}parseRow(t,e=!0){const r=[];let s=0;const n=t.length;let i=U;for(let e=0;e<n;e++)switch(i){case U:switch(t.charAt(e)){case V:s=e+1,i=X;break;case this.delimiter:if(s=e+1," "===this.delimiter&&this.delimWhitespace)break;r.push(""),i=U;break;default:i=Q,s=e}break;case Q:switch(t.charAt(e)){case this.delimiter:r.push(t.substring(s,e)),i=U,s=e+1}break;case X:switch(t.charAt(e)){case V:i=G}break;case G:switch(t.charAt(e)){case this.delimiter:r.push(t.substring(s,e-1)),i=U,s=e+1;break;case V:i=X;break;default:i=Z}break;case Z:switch(t.charAt(e)){case V:i=X}}if(i===G?r.push(t.substring(s,n-1)):r.push(t.substring(s)),e&&r.length!==this.fullColumnNames.length)throw new Error(`Invalid row in csv file. Should have ${this.fullColumnNames.length} elements in a row, but got ${r}`);return r}}class Y extends E{constructor(t){super(),this.microphoneConfig=t,this.isClosed=!1,this.fftSize=t.fftSize||1024;const e=Math.log2(this.fftSize);if(this.fftSize<0||e<4||e>14||!Number.isInteger(e))throw new Error(`Invalid fftSize: it must be a power of 2 between 2 to 4 and 2 to 14, but got ${this.fftSize}`);if(this.numFrames=t.numFramesPerSpectrogram||43,this.sampleRateHz=t.sampleRateHz,this.columnTruncateLength=t.columnTruncateLength||this.fftSize,this.audioTrackConstraints=t.audioTrackConstraints,this.smoothingTimeConstant=t.smoothingTimeConstant||0,this.includeSpectrogram=!1!==t.includeSpectrogram,this.includeWaveform=!0===t.includeWaveform,!this.includeSpectrogram&&!this.includeWaveform)throw new Error("Both includeSpectrogram and includeWaveform are false. At least one type of data should be returned.")}summary(){return"microphone"}static async create(t={}){if(e.env().get("IS_NODE"))throw new Error("microphone API is only supported in browser environment.");const r=new Y(t);return await r.start(),r}async start(){try{this.stream=await navigator.mediaDevices.getUserMedia({audio:null==this.audioTrackConstraints||this.audioTrackConstraints,video:!1})}catch(t){throw new Error(`Error thrown while initializing video stream: ${t.message}`)}if(!this.stream)throw new Error("Could not obtain audio from microphone.");const t=window.AudioContext||window.webkitAudioContext;if(this.audioContext=new t,this.sampleRateHz){if(this.audioContext.sampleRate!==this.sampleRateHz)throw new Error(`Mismatch in sampling rate: Expected: ${this.sampleRateHz}; Actual: ${this.audioContext.sampleRate}`)}else this.sampleRateHz=this.audioContext.sampleRate;const e=this.audioContext.createMediaStreamSource(this.stream);this.analyser=this.audioContext.createAnalyser(),this.analyser.fftSize=2*this.fftSize,this.analyser.smoothingTimeConstant=this.smoothingTimeConstant,e.connect(this.analyser),this.freqData=new Float32Array(this.fftSize),this.timeData=new Float32Array(this.fftSize)}async next(){if(this.isClosed)return{value:null,done:!0};let t,e;const r=await this.getAudioData();if(this.includeSpectrogram){const e=this.flattenQueue(r.freqDataQueue);t=this.getTensorFromAudioDataArray(e,[this.numFrames,this.columnTruncateLength,1])}if(this.includeWaveform){const t=this.flattenQueue(r.timeDataQueue);e=this.getTensorFromAudioDataArray(t,[this.numFrames*this.fftSize,1])}return{value:{spectrogram:t,waveform:e},done:!1}}async capture(){return(await this.next()).value}async getAudioData(){const t=[],e=[];let r=0;return new Promise((s=>{const n=setInterval((()=>{this.includeSpectrogram&&(this.analyser.getFloatFrequencyData(this.freqData),this.freqData[0]===-1/0&&s({freqDataQueue:t,timeDataQueue:e}),t.push(this.freqData.slice(0,this.columnTruncateLength))),this.includeWaveform&&(this.analyser.getFloatTimeDomainData(this.timeData),e.push(this.timeData.slice())),++r===this.numFrames&&(clearInterval(n),s({freqDataQueue:t,timeDataQueue:e}))}),this.fftSize/this.sampleRateHz*1e3)}))}stop(){this.isClosed||(this.isClosed=!0,this.analyser.disconnect(),this.audioContext.close(),null!=this.stream&&this.stream.getTracks().length>0&&this.stream.getTracks()[0].stop())}toArray(){throw new Error("Can not convert infinite audio stream to array.")}getSampleRate(){return this.sampleRateHz}flattenQueue(t){const e=t[0].length,r=new Float32Array(t.length*e);return t.forEach(((t,s)=>r.set(t,s*e))),r}getTensorFromAudioDataArray(t,r){const s=new Float32Array(e.util.sizeFromShape(r));return s.set(t,s.length-t.length),e.tensor(s,r)}}class K extends E{constructor(t,r){if(super(),this.webcamVideoElement=t,this.webcamConfig=r,this.isClosed=!0,this.resize=!1,this.needToResize())if(this.resize=!0,this.cropSize=[this.webcamConfig.resizeHeight,this.webcamConfig.resizeWidth],this.cropBoxInd=e.tensor1d([0],"int32"),this.webcamConfig.centerCrop){const t=1*this.webcamConfig.resizeWidth/this.webcamVideoElement.width,r=1*this.webcamConfig.resizeHeight/this.webcamVideoElement.height,s=(1-t)/2,n=(1-r)/2,i=s+t,a=r+n;this.cropBox=e.tensor2d([n,s,a,i],[1,4])}else this.cropBox=e.tensor2d([0,0,1,1],[1,4])}summary(){return"webcam"}static async create(t,r={}){if(e.env().get("IS_NODE"))throw new Error("tf.data.webcam is only supported in browser environment.");if(!t){if(t=document.createElement("video"),!r.resizeWidth||!r.resizeHeight)throw new Error("Please provide webcam video element, or resizeWidth and resizeHeight to create a hidden video element.");t.width=r.resizeWidth,t.height=r.resizeHeight}const s=new K(t,r);return await s.start(),s}async start(){this.webcamConfig.facingMode&&e.util.assert("user"===this.webcamConfig.facingMode||"environment"===this.webcamConfig.facingMode,(()=>`Invalid webcam facing mode: ${this.webcamConfig.facingMode}. Please provide 'user' or 'environment'`));try{this.stream=await navigator.mediaDevices.getUserMedia({video:{deviceId:this.webcamConfig.deviceId,facingMode:this.webcamConfig.facingMode?this.webcamConfig.facingMode:"user",width:this.webcamVideoElement.width,height:this.webcamVideoElement.height}})}catch(t){throw t.message=`Error thrown while initializing video stream: ${t.message}`,t}if(!this.stream)throw new Error("Could not obtain video from webcam.");try{this.webcamVideoElement.srcObject=this.stream}catch(t){console.log(t),this.webcamVideoElement.src=window.URL.createObjectURL(this.stream)}return this.webcamVideoElement.play(),this.isClosed=!1,new Promise((t=>{this.webcamVideoElement.onloadedmetadata=()=>{t()}}))}async next(){if(this.isClosed)return{value:null,done:!0};let t;try{t=e.browser.fromPixels(this.webcamVideoElement)}catch(t){throw new Error(`Error thrown converting video to pixels: ${JSON.stringify(t)}`)}if(!this.resize)return{value:t,done:!1};try{return{value:this.cropAndResizeFrame(t),done:!1}}catch(t){throw new Error(`Error thrown cropping the video: ${t.message}`)}finally{t.dispose()}}needToResize(){return!(!this.webcamConfig.resizeWidth||!this.webcamConfig.resizeHeight||this.webcamVideoElement.width===this.webcamConfig.resizeWidth&&this.webcamVideoElement.height===this.webcamConfig.resizeHeight)}cropAndResizeFrame(t){return e.tidy((()=>{const r=e.expandDims(e.cast(t,"float32"),0);let s;s=e.image.cropAndResize(r,this.cropBox,this.cropBoxInd,this.cropSize,"bilinear");const n=s.shape;return e.reshape(s,n.slice(1))}))}async capture(){return(await this.next()).value}stop(){this.stream.getTracks().forEach((t=>t.stop()));try{this.webcamVideoElement.srcObject=null}catch(t){console.log(t),this.webcamVideoElement.src=null}this.isClosed=!0}toArray(){throw new Error("Can not convert infinite video stream to array.")}}class tt{}class et extends E{split(t){return new rt(this,t)}}class rt extends et{constructor(t,e){super(),this.upstream=t,this.impl=new st(t,e)}summary(){return this.impl.summary()}async next(){return this.impl.next()}}class st extends O{constructor(t,e){super(),this.upstream=t,this.separator=e,this.carryover=""}summary(){return`${this.upstream.summary()} -> Split('${this.separator}')`}async pump(){const t=await this.upstream.next();if(t.done)return""!==this.carryover&&(this.outputQueue.push(this.carryover),this.carryover="",!0);const e=t.value.split(this.separator);e[0]=this.carryover+e[0];for(const t of e.slice(0,-1))this.outputQueue.push(t);return this.carryover=e[e.length-1],!0}}class nt extends E{decodeUTF8(){return new it(this)}}class it extends et{constructor(t){super(),this.upstream=t,this.impl=new at(t)}summary(){return this.impl.summary()}async next(){return this.impl.next()}}class at extends O{constructor(t){if(super(),this.upstream=t,e.env().get("IS_BROWSER"))this.decoder=new TextDecoder("utf-8");else{const{StringDecoder:t}=require("string_decoder");this.decoder=new t("utf8")}}summary(){return`${this.upstream.summary()} -> Utf8`}async pump(){const t=await this.upstream.next();let r,s;return!t.done&&(r=t.value,s=e.env().get("IS_BROWSER")?this.decoder.decode(r,{stream:!0}):this.decoder.write(Buffer.from(r.buffer)),this.outputQueue.push(s),!0)}}class ot extends nt{constructor(t,r={}){super(),this.file=t,this.options=r,e.util.assert(t instanceof Uint8Array||!!e.env().get("IS_BROWSER")&&(t instanceof File||t instanceof Blob),(()=>"FileChunkIterator only supports File, Blob and Uint8Array right now.")),this.offset=r.offset||0,this.chunkSize=r.chunkSize||1048576}summary(){return`FileChunks ${this.file}`}async next(){if(this.offset>=(this.file instanceof Uint8Array?this.file.byteLength:this.file.size))return{value:null,done:!0};const t=new Promise(((t,e)=>{const r=this.offset+this.chunkSize;if(this.file instanceof Uint8Array)t(new Uint8Array(this.file.slice(this.offset,r)));else{const s=new FileReader;s.onload=r=>{let n=s.result;if(n instanceof ArrayBuffer&&(n=new Uint8Array(n)),!(n instanceof Uint8Array))return e(new TypeError("FileReader returned unknown type."));t(n)},s.onabort=t=>e(new Error("Aborted")),s.onerror=t=>e(new Error(t.type));const n=this.file.slice(this.offset,r);s.readAsArrayBuffer(n)}this.offset=r}));return{value:await t,done:!1}}}const ut=t=>({method:t.method,headers:t.headers,body:t.body,mode:t.mode,credentials:t.credentials,cache:t.cache,redirect:t.redirect,referrer:t.referrer,integrity:t.integrity});function ht(t){return"string"==typeof t&&"file://"===t.substr(0,7)}class lt extends tt{constructor(t,e={}){super(),this.input=t,this.options=e}async iterator(){if(ht(this.input)&&e.env().get("IS_NODE")){const t=require("fs");this.input=t.readFileSync(this.input.substr(7))}return new ot(this.input,this.options)}}class ct extends tt{constructor(t,e={}){super(),this.url=t,this.fileOptions=e}async iterator(){return ht(this.url)?new lt(this.url,this.fileOptions).iterator():async function(t,r={}){let s,n;"string"==typeof t?s=t:(s=t.url,n=ut(t));const i=await e.util.fetch(s,n);if(i.ok){const t=new Uint8Array(await i.arrayBuffer());return new ot(t,r)}throw new Error(i.statusText)}(this.url,this.fileOptions)}}t.CSVDataset=J,t.Dataset=B,t.FileDataSource=lt,t.TextLineDataset=_,t.URLDataSource=ct,t.array=function(t){return P((async()=>C(t)),t.length)},t.csv=function(t,e={}){return new J(new ct(t),e)},t.func=function(t){const e=z(t);return P((async()=>e))},t.generator=function(t){return P((async()=>{const e=await t();return z((()=>e.next()))}))},t.microphone=async function(t){return Y.create(t)},t.version_data="3.6.0",t.webcam=async function(t,e){return K.create(t,e)},t.zip=function(t){if(!y(t))throw new Error("The argument to zip() must be an object or array.");let e;if(Array.isArray(t))for(let r=0;r<t.length;r++)e=null==e?t[r].size:Math.min(e,t[r].size);else if(t instanceof Object)for(const r in t)e=null==e?t[r].size:Math.min(e,t[r].size);return P((async()=>function(t,e=l.FAIL){return new L(t,e)}(await w(t,(t=>{if(t instanceof B)return{value:t.iterator(),recurse:!1};if(y(t))return{value:null,recurse:!0};throw new Error("Leaves of the structure passed to zip() must be Datasets, not primitives.")})),l.SHORTEST)),e)},Object.defineProperty(t,"__esModule",{value:!0})}));
 //# sourceMappingURL=tf-data.es2017.min.js.map

dist/tf-data.fesm.min.js

@@ -17,3 +17,3 @@ /**
  */
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this.lastRead=this.readFromChain(this.lastRead),this.lastRead}async readFromChain(t){if(await t,null==this.iterator){const t=await this.moreIterators.next();if(t.done)return{value:null,done:!0};this.iterator=t.value,null!=this.baseErrorHandler&&(this.iterator=this.iterator.handleErrors(this.baseErrorHandler))}const e=await this.iterator.next();return e.done?(this.iterator=null,this.readFromChain(t)):e}}!function(t){t[t.FAIL=0]="FAIL",t[t.SHORTEST=1]="SHORTEST",t[t.LONGEST=2]="LONGEST"}(z||(z={}));class J extends j{constructor(t,e=z.FAIL){super(),this.iterators=t,this.mismatchMode=e,this.count=0,this.currentPromise=null}summary(){return"{TODO: fill in upstream of zip summaries} -> Zip"}async nextState(t){await t;let e=0,r=0;const s=await F(this.iterators,(function(t){if(t instanceof j){return{value:t.next().then((t=>(e++,t.done&&r++,t.value))),recurse:!1}}return{value:null,recurse:!0}}));if(e===r)return{value:null,done:!0};if(r>0)switch(this.mismatchMode){case z.FAIL:throw new Error(`Zipped streams should have the same length. Mismatched at element ${this.count}.`);case z.SHORTEST:return{value:null,done:!0};case z.LONGEST:}return this.count++,{value:s,done:!1}}async next(){return this.currentPromise=this.nextState(this.currentPromise),this.currentPromise}}class Y extends j{constructor(t,e){super(),this.upstream=t,this.bufferSize=e,this.buffer=new D(e)}summary(){return`${this.upstream.summary()} -> Prefetch`}refill(){for(;!this.buffer.isFull();){const t=this.upstream.next();this.buffer.push(t)}}next(){return this.refill(),this.buffer.shift()}}class K extends Y{constructor(t,r,s){super(t,r),this.upstream=t,this.windowSize=r,this.upstreamExhausted=!1,this.random=E(s||e.now().toString()),this.lastRead=Promise.resolve({value:null,done:!1})}async next(){return this.lastRead=this.lastRead.then((()=>this.serialNext())),this.lastRead}randomInt(t){return Math.floor(this.random()*t)}chooseIndex(){return this.randomInt(this.buffer.length())}async serialNext(){for(this.upstreamExhausted||this.refill();!this.buffer.isEmpty();){const t=this.chooseIndex(),e=await this.buffer.shuffleExcise(t);if(!e.done)return this.refill(),e;this.upstreamExhausted=!0}return{value:null,done:!0}}}class tt{constructor(){this.size=null}batch(t,r=!0){const s=this;let n;return e.assert(t>0,(()=>`batchSize needs to be positive, but it is\n      ${t}`)),n=this.size===1/0||null==this.size?this.size:r?Math.ceil(this.size/t):Math.floor(this.size/t),et((async()=>(await s.iterator()).columnMajorBatch(t,r,nt)),n)}concatenate(t){const e=this;let r;return r=this.size===1/0||t.size===1/0?1/0:null!=this.size&&null!=t.size?this.size+t.size:null,et((async()=>(await e.iterator()).concatenate(await t.iterator())),r)}filter(t){const e=this;let r;return r=this.size===1/0?1/0:null,et((async()=>(await e.iterator()).filter((e=>n((()=>t(e)))))),r)}async forEachAsync(t){return(await this.iterator()).forEachAsync(t)}map(t){const e=this;return et((async()=>(await e.iterator()).map((e=>n((()=>t(e)))))),this.size)}mapAsync(t){const e=this;return et((async()=>(await e.iterator()).mapAsync(t)),this.size)}prefetch(t){if(null==t)throw new RangeError("`Dataset.prefetch()` requires bufferSize to be specified.");const e=this;return et((async()=>(await e.iterator()).prefetch(t)),this.size)}repeat(t){const e=this;let r;return r=null!=this.size&&t>0?this.size*t:0===t?0:null!=this.size&&(void 0===t||t<0)?1/0:null,et((async()=>{const r=$((async()=>({value:await e.iterator(),done:!1})));return s=r.take(t),new Z(s,n);var s,n}),r)}skip(t){const e=this;let r;return r=null!=this.size&&t>=0&&this.size>=t?this.size-t:null!=this.size&&(this.size<t||void 0===t||t<0)?0:null,et((async()=>(await e.iterator()).skip(t)),r)}shuffle(t,r,s=!0){if(null==t||t<0)throw null==this.size?new RangeError("`Dataset.shuffle()` requires bufferSize to be specified."):new RangeError(`\`Dataset.shuffle()\` requires bufferSize to be specified.  If your data fits in main memory (for regular JS objects), and/or GPU memory (for \`tf.Tensor\`s), consider setting bufferSize to the dataset size (${this.size} elements)`);const n=this,i=E(r||e.now().toString());return et((async()=>{let e=i.int32();return s&&(e+=i.int32()),(await n.iterator()).shuffle(t,e.toString())}),this.size)}take(t){const e=this;let r;return r=null!=this.size&&this.size>t?t:null!=this.size&&this.size<=t?this.size:null,et((async()=>(await e.iterator()).take(t)),r)}async toArray(){if(this.size===1/0)throw new Error("Can not convert infinite data stream to array.");return(await this.iterator()).toArray()}async toArrayForTest(){if(this.size===1/0)throw new Error("Can not convert infinite data stream to array.");return(await this.iterator()).toArrayForTest()}}function et(t,e=null){return new class extends tt{constructor(){super(...arguments),this.size=e}async iterator(){return t()}}}function rt(t){return et((async()=>O(t)),t.length)}function st(t){if(!k(t))throw new Error("The argument to zip() must be an object or array.");let e;if(Array.isArray(t))for(let r=0;r<t.length;r++)e=null==e?t[r].size:Math.min(e,t[r].size);else if(t instanceof Object)for(const r in t)e=null==e?t[r].size:Math.min(e,t[r].size);return et((async()=>function(t,e=z.FAIL){return new J(t,e)}(await F(t,(t=>{if(t instanceof tt)return{value:t.iterator(),recurse:!1};if(k(t))return{value:null,recurse:!0};throw new Error("Leaves of the structure passed to zip() must be Datasets, not primitives.")})),z.SHORTEST)),e)}function nt(r){if(null===r)return null;const s=r[0];if(null==(n=s)||null===(o=n)||"object"!=typeof o&&"function"!=typeof o||Array.isArray(n)||"object"==typeof n&&n instanceof t||e.isTypedArray(n)){return{value:function(e){if(0===e.length)throw new Error("Can't make a batch of zero elements.");return e[0]instanceof t?i(e):a(e)}(r),recurse:!1}}var n,o;return{value:null,recurse:!0}}tt.MAX_BUFFER_SIZE=1e4;class it extends tt{constructor(t){super(),this.input=t}async iterator(){return(await this.input.iterator()).decodeUTF8().split("\n").map((t=>(t.endsWith("\r")&&(t=t.slice(0,-1)),t)))}}const at=Symbol("out"),ot=Symbol("field"),ut=Symbol("quote"),ht=Symbol("quoteafterquote"),lt=Symbol("quoteinquote");class ct extends tt{constructor(t,r){super(),this.input=t,this.hasHeader=!0,this.fullColumnNames=null,this.columnNamesValidated=!1,this.columnConfigs=null,this.configuredColumnsOnly=!1,this.delimiter=",",this.delimWhitespace=!1,this.base=new it(t),r||(r={}),this.hasHeader=!1!==r.hasHeader,this.fullColumnNames=r.columnNames,this.columnConfigs=r.columnConfigs,this.configuredColumnsOnly=r.configuredColumnsOnly,r.delimWhitespace?(e.assert(null==r.delimiter,(()=>"Delimiter should not be provided when delimWhitespace is true.")),this.delimWhitespace=!0,this.delimiter=" "):this.delimiter=r.delimiter?r.delimiter:","}async columnNames(){return this.columnNamesValidated||await this.setColumnNames(),this.configuredColumnsOnly?Object.keys(this.columnConfigs):this.fullColumnNames}async setColumnNames(){const t=await this.maybeReadHeaderLine();if(!this.fullColumnNames&&!t)throw new Error("Column names must be provided if there is no header line.");this.fullColumnNames&&t&&e.assert(t.length===this.fullColumnNames.length,(()=>"The length of provided columnNames ("+this.fullColumnNames.length.toString()+") does not match the length of the header line read from file ("+t.length.toString()+").")),this.fullColumnNames||(this.fullColumnNames=t);const r=this.fullColumnNames.reduce(((t,e)=>(t[e]=t[e]+1||1,t)),{}),s=Object.keys(r).filter((t=>r[t]>1));if(e.assert(0===s.length,(()=>"Duplicate column names found: "+s.toString())),this.columnConfigs)for(const t of Object.keys(this.columnConfigs)){if(-1===this.fullColumnNames.indexOf(t))throw new Error('The key "'+t+'" provided in columnConfigs does not match any of the column names ('+this.fullColumnNames.toString()+").")}this.columnNamesValidated=!0}async maybeReadHeaderLine(){if(this.hasHeader){const t=await this.base.iterator(),e=await t.next();if(e.done)throw new Error("No data was found for CSV parsing.");const r=e.value;return this.parseRow(r,!1)}return null}async iterator(){this.columnNamesValidated||await this.setColumnNames();let t=await this.base.iterator();return this.hasHeader&&(t=t.skip(1)),t.map((t=>this.makeDataElement(t)))}makeDataElement(t){const e=this.parseRow(t),r={},s={};for(let n=0;n<this.fullColumnNames.length;n++){const i=this.fullColumnNames[n],a=this.columnConfigs?this.columnConfigs[i]:null;if(!this.configuredColumnsOnly||a){const o=e[n];let u=null;if(""===o)if(a&&void 0!==a.default)u=a.default;else{if(a&&(a.required||a.isLabel))throw new Error(`Required column ${i} is empty in this line: ${t}`);u=void 0}else{const t=Number(o);if(isNaN(t))u=a&&"bool"===a.dtype?this.getBoolean(o):o;else if(a&&a.dtype)switch(a.dtype){case"float32":u=t;break;case"int32":u=Math.floor(t);break;case"bool":u=this.getBoolean(o);break;default:u=t}else u=t}a&&a.isLabel?s[i]=u:r[i]=u}}return 0===Object.keys(s).length?r:{xs:r,ys:s}}getBoolean(t){return"1"===t||"true"===t.toLowerCase()?1:0}parseRow(t,e=!0){const r=[];let s=0;const n=t.length;let i=at;for(let e=0;e<n;e++)switch(i){case at:switch(t.charAt(e)){case'"':s=e+1,i=ut;break;case this.delimiter:if(s=e+1," "===this.delimiter&&this.delimWhitespace)break;r.push(""),i=at;break;default:i=ot,s=e}break;case ot:switch(t.charAt(e)){case this.delimiter:r.push(t.substring(s,e)),i=at,s=e+1}break;case ut:switch(t.charAt(e)){case'"':i=ht}break;case ht:switch(t.charAt(e)){case this.delimiter:r.push(t.substring(s,e-1)),i=at,s=e+1;break;case'"':i=ut;break;default:i=lt}break;case lt:switch(t.charAt(e)){case'"':i=ut}}if(i===ht?r.push(t.substring(s,n-1)):r.push(t.substring(s)),e&&r.length!==this.fullColumnNames.length)throw new Error(`Invalid row in csv file. Should have ${this.fullColumnNames.length} elements in a row, but got ${r}`);return r}}class ft extends j{constructor(t){super(),this.microphoneConfig=t,this.isClosed=!1,this.fftSize=t.fftSize||1024;const e=Math.log2(this.fftSize);if(this.fftSize<0||e<4||e>14||!Number.isInteger(e))throw new Error(`Invalid fftSize: it must be a power of 2 between 2 to 4 and 2 to 14, but got ${this.fftSize}`);if(this.numFrames=t.numFramesPerSpectrogram||43,this.sampleRateHz=t.sampleRateHz,this.columnTruncateLength=t.columnTruncateLength||this.fftSize,this.audioTrackConstraints=t.audioTrackConstraints,this.smoothingTimeConstant=t.smoothingTimeConstant||0,this.includeSpectrogram=!1!==t.includeSpectrogram,this.includeWaveform=!0===t.includeWaveform,!this.includeSpectrogram&&!this.includeWaveform)throw new Error("Both includeSpectrogram and includeWaveform are false. At least one type of data should be returned.")}summary(){return"microphone"}static async create(t={}){if(o().get("IS_NODE"))throw new Error("microphone API is only supported in browser environment.");const e=new ft(t);return await e.start(),e}async start(){try{this.stream=await navigator.mediaDevices.getUserMedia({audio:null==this.audioTrackConstraints||this.audioTrackConstraints,video:!1})}catch(t){throw new Error(`Error thrown while initializing video stream: ${t.message}`)}if(!this.stream)throw new Error("Could not obtain audio from microphone.");const t=window.AudioContext||window.webkitAudioContext;if(this.audioContext=new t,this.sampleRateHz){if(this.audioContext.sampleRate!==this.sampleRateHz)throw new Error(`Mismatch in sampling rate: Expected: ${this.sampleRateHz}; Actual: ${this.audioContext.sampleRate}`)}else this.sampleRateHz=this.audioContext.sampleRate;const e=this.audioContext.createMediaStreamSource(this.stream);this.analyser=this.audioContext.createAnalyser(),this.analyser.fftSize=2*this.fftSize,this.analyser.smoothingTimeConstant=this.smoothingTimeConstant,e.connect(this.analyser),this.freqData=new Float32Array(this.fftSize),this.timeData=new Float32Array(this.fftSize)}async next(){if(this.isClosed)return{value:null,done:!0};let t,e;const r=await this.getAudioData();if(this.includeSpectrogram){const e=this.flattenQueue(r.freqDataQueue);t=this.getTensorFromAudioDataArray(e,[this.numFrames,this.columnTruncateLength,1])}if(this.includeWaveform){const t=this.flattenQueue(r.timeDataQueue);e=this.getTensorFromAudioDataArray(t,[this.numFrames*this.fftSize,1])}return{value:{spectrogram:t,waveform:e},done:!1}}async capture(){return(await this.next()).value}async getAudioData(){const t=[],e=[];let r=0;return new Promise((s=>{const n=setInterval((()=>{this.includeSpectrogram&&(this.analyser.getFloatFrequencyData(this.freqData),this.freqData[0]===-1/0&&s({freqDataQueue:t,timeDataQueue:e}),t.push(this.freqData.slice(0,this.columnTruncateLength))),this.includeWaveform&&(this.analyser.getFloatTimeDomainData(this.timeData),e.push(this.timeData.slice())),++r===this.numFrames&&(clearInterval(n),s({freqDataQueue:t,timeDataQueue:e}))}),this.fftSize/this.sampleRateHz*1e3)}))}stop(){this.isClosed||(this.isClosed=!0,this.analyser.disconnect(),this.audioContext.close(),null!=this.stream&&this.stream.getTracks().length>0&&this.stream.getTracks()[0].stop())}toArray(){throw new Error("Can not convert infinite audio stream to array.")}getSampleRate(){return this.sampleRateHz}flattenQueue(t){const e=t[0].length,r=new Float32Array(t.length*e);return t.forEach(((t,s)=>r.set(t,s*e))),r}getTensorFromAudioDataArray(t,r){const s=new Float32Array(e.sizeFromShape(r));return s.set(t,s.length-t.length),a(s,r)}}class mt extends j{constructor(t,e){if(super(),this.webcamVideoElement=t,this.webcamConfig=e,this.isClosed=!0,this.resize=!1,this.needToResize())if(this.resize=!0,this.cropSize=[this.webcamConfig.resizeHeight,this.webcamConfig.resizeWidth],this.cropBoxInd=u([0],"int32"),this.webcamConfig.centerCrop){const t=1*this.webcamConfig.resizeWidth/this.webcamVideoElement.width,e=1*this.webcamConfig.resizeHeight/this.webcamVideoElement.height,r=(1-t)/2,s=(1-e)/2,n=r+t,i=e+s;this.cropBox=h([s,r,i,n],[1,4])}else this.cropBox=h([0,0,1,1],[1,4])}summary(){return"webcam"}static async create(t,e={}){if(o().get("IS_NODE"))throw new Error("tf.data.webcam is only supported in browser environment.");if(!t){if(t=document.createElement("video"),!e.resizeWidth||!e.resizeHeight)throw new Error("Please provide webcam video element, or resizeWidth and resizeHeight to create a hidden video element.");t.width=e.resizeWidth,t.height=e.resizeHeight}const r=new mt(t,e);return await r.start(),r}async start(){this.webcamConfig.facingMode&&e.assert("user"===this.webcamConfig.facingMode||"environment"===this.webcamConfig.facingMode,(()=>`Invalid webcam facing mode: ${this.webcamConfig.facingMode}. Please provide 'user' or 'environment'`));try{this.stream=await navigator.mediaDevices.getUserMedia({video:{deviceId:this.webcamConfig.deviceId,facingMode:this.webcamConfig.facingMode?this.webcamConfig.facingMode:"user",width:this.webcamVideoElement.width,height:this.webcamVideoElement.height}})}catch(t){throw t.message=`Error thrown while initializing video stream: ${t.message}`,t}if(!this.stream)throw new Error("Could not obtain video from webcam.");try{this.webcamVideoElement.srcObject=this.stream}catch(t){console.log(t),this.webcamVideoElement.src=window.URL.createObjectURL(this.stream)}return this.webcamVideoElement.play(),this.isClosed=!1,new Promise((t=>{this.webcamVideoElement.onloadedmetadata=()=>{t()}}))}async next(){if(this.isClosed)return{value:null,done:!0};let t;try{t=l.fromPixels(this.webcamVideoElement)}catch(t){throw new Error(`Error thrown converting video to pixels: ${JSON.stringify(t)}`)}if(!this.resize)return{value:t,done:!1};try{return{value:this.cropAndResizeFrame(t),done:!1}}catch(t){throw new Error(`Error thrown cropping the video: ${t.message}`)}finally{t.dispose()}}needToResize(){return!(!this.webcamConfig.resizeWidth||!this.webcamConfig.resizeHeight||this.webcamVideoElement.width===this.webcamConfig.resizeWidth&&this.webcamVideoElement.height===this.webcamConfig.resizeHeight)}cropAndResizeFrame(t){return n((()=>{const e=c(f(t,"float32"),0);let r;r=m.cropAndResize(e,this.cropBox,this.cropBoxInd,this.cropSize,"bilinear");const s=r.shape;return d(r,s.slice(1))}))}async capture(){return(await this.next()).value}stop(){this.stream.getTracks().forEach((t=>t.stop()));try{this.webcamVideoElement.srcObject=null}catch(t){console.log(t),this.webcamVideoElement.src=null}this.isClosed=!0}toArray(){throw new Error("Can not convert infinite video stream to array.")}}class dt{}class pt extends j{split(t){return new wt(this,t)}}class wt extends pt{constructor(t,e){super(),this.upstream=t,this.impl=new yt(t,e)}summary(){return this.impl.summary()}async next(){return this.impl.next()}}class yt extends X{constructor(t,e){super(),this.upstream=t,this.separator=e,this.carryover=""}summary(){return`${this.upstream.summary()} -> Split('${this.separator}')`}async pump(){const t=await this.upstream.next();if(t.done)return""!==this.carryover&&(this.outputQueue.push(this.carryover),this.carryover="",!0);const e=t.value.split(this.separator);e[0]=this.carryover+e[0];for(const t of e.slice(0,-1))this.outputQueue.push(t);return this.carryover=e[e.length-1],!0}}class gt extends j{decodeUTF8(){return new xt(this)}}class xt extends pt{constructor(t){super(),this.upstream=t,this.impl=new vt(t)}summary(){return this.impl.summary()}async next(){return this.impl.next()}}class vt extends X{constructor(t){if(super(),this.upstream=t,o().get("IS_BROWSER"))this.decoder=new TextDecoder("utf-8");else{const{StringDecoder:t}=require("string_decoder");this.decoder=new t("utf8")}}summary(){return`${this.upstream.summary()} -> Utf8`}async pump(){const t=await this.upstream.next();let e,r;return!t.done&&(e=t.value,r=o().get("IS_BROWSER")?this.decoder.decode(e,{stream:!0}):this.decoder.write(Buffer.from(e.buffer)),this.outputQueue.push(r),!0)}}class bt extends gt{constructor(t,r={}){super(),this.file=t,this.options=r,e.assert(t instanceof Uint8Array||!!o().get("IS_BROWSER")&&(t instanceof File||t instanceof Blob),(()=>"FileChunkIterator only supports File, Blob and Uint8Array right now.")),this.offset=r.offset||0,this.chunkSize=r.chunkSize||1048576}summary(){return`FileChunks ${this.file}`}async next(){if(this.offset>=(this.file instanceof Uint8Array?this.file.byteLength:this.file.size))return{value:null,done:!0};const t=new Promise(((t,e)=>{const r=this.offset+this.chunkSize;if(this.file instanceof Uint8Array)t(new Uint8Array(this.file.slice(this.offset,r)));else{const s=new FileReader;s.onload=r=>{let n=s.result;if(n instanceof ArrayBuffer&&(n=new Uint8Array(n)),!(n instanceof Uint8Array))return e(new TypeError("FileReader returned unknown type."));t(n)},s.onabort=t=>e(new Error("Aborted")),s.onerror=t=>e(new Error(t.type));const n=this.file.slice(this.offset,r);s.readAsArrayBuffer(n)}this.offset=r}));return{value:await t,done:!1}}}const Ct=t=>({method:t.method,headers:t.headers,body:t.body,mode:t.mode,credentials:t.credentials,cache:t.cache,redirect:t.redirect,referrer:t.referrer,integrity:t.integrity});function zt(t){return"string"==typeof t&&"file://"===t.substr(0,7)}class Et extends dt{constructor(t,e={}){super(),this.input=t,this.options=e}async iterator(){if(zt(this.input)&&o().get("IS_NODE")){const t=require("fs");this.input=t.readFileSync(this.input.substr(7))}return new bt(this.input,this.options)}}class At extends dt{constructor(t,e={}){super(),this.url=t,this.fileOptions=e}async iterator(){return zt(this.url)?new Et(this.url,this.fileOptions).iterator():async function(t,r={}){let s,n;"string"==typeof t?s=t:(s=t.url,n=Ct(t));const i=await e.fetch(s,n);if(i.ok){const t=new Uint8Array(await i.arrayBuffer());return new bt(t,r)}throw new Error(i.statusText)}(this.url,this.fileOptions)}}function St(t,e={}){return new ct(new At(t),e)}function Rt(t){const e=$(t);return et((async()=>e))}function Tt(t){return et((async()=>{const e=await t();return $((()=>e.next()))}))}async function Ft(t,e){return mt.create(t,e)}async function kt(t){return ft.create(t)}const Nt="3.5.0";export{ct as CSVDataset,tt as Dataset,Et as FileDataSource,it as TextLineDataset,At as URLDataSource,rt as array,St as csv,Rt as func,Tt as generator,kt as microphone,Nt as version_data,Ft as webcam,st as zip};
+import{Tensor as t,util as e,dispose as r,tensor_util as s,tidy as n,stack as i,tensor as a,env as o,tensor1d as u,tensor2d as h,browser as l,expandDims as c,cast as f,image as m,reshape as d}from"@tensorflow/tfjs-core";"undefined"!=typeof globalThis?globalThis:"undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self&&self;function p(t,e){return t(e={exports:{}},e.exports),e.exports}var w=p((function(t){!function(t,e,r){function s(t){var e,r=this,s=(e=4022871197,function(t){t=t.toString();for(var r=0;r<t.length;r++){var s=.02519603282416938*(e+=t.charCodeAt(r));s-=e=s>>>0,e=(s*=e)>>>0,e+=4294967296*(s-=e)}return 2.3283064365386963e-10*(e>>>0)});r.next=function(){var t=2091639*r.s0+2.3283064365386963e-10*r.c;return r.s0=r.s1,r.s1=r.s2,r.s2=t-(r.c=0|t)},r.c=1,r.s0=s(" "),r.s1=s(" "),r.s2=s(" "),r.s0-=s(t),r.s0<0&&(r.s0+=1),r.s1-=s(t),r.s1<0&&(r.s1+=1),r.s2-=s(t),r.s2<0&&(r.s2+=1),s=null}function n(t,e){return 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e=s.getTensorsInContainer(t.value),r=this.transform(t.value),n=s.getTensorsInContainer(r);for(const t of e)s.isTensorInList(t,n)||t.dispose();return{value:r,done:!1}}}class Q extends j{constructor(t,e){super(),this.upstream=t,this.handler=e,this.count=0,this.lastRead=Promise.resolve({value:null,done:!1})}summary(){return`${this.upstream.summary()} -> handleErrors`}async next(){return this.lastRead=this.lastRead.then((()=>this.serialNext())),this.lastRead}async serialNext(){for(;;)try{return await this.upstream.next()}catch(t){if(!this.handler(t))return{value:null,done:!0}}}}class _ extends j{constructor(t,e){super(),this.upstream=t,this.transform=e}summary(){return`${this.upstream.summary()} -> AsyncMap`}async next(){const t=await this.upstream.next();if(t.done)return{value:null,done:!0};const e=s.getTensorsInContainer(t.value),r=await this.transform(t.value),n=s.getTensorsInContainer(r);for(const t of e)s.isTensorInList(t,n)||t.dispose();return{value:r,done:!1}}}class X extends j{constructor(){super(),this.outputQueue=new M,this.lastRead=Promise.resolve({value:null,done:!1})}async next(){return this.lastRead=this.lastRead.then((()=>this.serialNext())),this.lastRead}async serialNext(){for(;0===this.outputQueue.length();)if(!await this.pump())return{value:null,done:!0};return{value:this.outputQueue.shift(),done:!1}}}class G extends X{constructor(t,e){super(),this.upstream=t,this.transform=e}summary(){return`${this.upstream.summary()} -> Flatmap`}async pump(){const t=await this.upstream.next();if(t.done)return!1;const e=s.getTensorsInContainer(t.value),r=this.transform(t.value),n=s.getTensorsInContainer(r);this.outputQueue.pushAll(r);for(const t of e)s.isTensorInList(t,n)||t.dispose();return!0}}class Z extends j{constructor(t,e){super(),this.baseErrorHandler=e,this.lastRead=null,this.iterator=null,this.moreIterators=t}summary(){return"TODO: fill in upstream of chained summaries -> Chained"}async next(){return this.lastRead=this.readFromChain(this.lastRead),this.lastRead}async readFromChain(t){if(await t,null==this.iterator){const t=await this.moreIterators.next();if(t.done)return{value:null,done:!0};this.iterator=t.value,null!=this.baseErrorHandler&&(this.iterator=this.iterator.handleErrors(this.baseErrorHandler))}const e=await this.iterator.next();return e.done?(this.iterator=null,this.readFromChain(t)):e}}!function(t){t[t.FAIL=0]="FAIL",t[t.SHORTEST=1]="SHORTEST",t[t.LONGEST=2]="LONGEST"}(z||(z={}));class J extends j{constructor(t,e=z.FAIL){super(),this.iterators=t,this.mismatchMode=e,this.count=0,this.currentPromise=null}summary(){return"{TODO: fill in upstream of zip summaries} -> Zip"}async nextState(t){await t;let e=0,r=0;const s=await F(this.iterators,(function(t){if(t instanceof j){return{value:t.next().then((t=>(e++,t.done&&r++,t.value))),recurse:!1}}return{value:null,recurse:!0}}));if(e===r)return{value:null,done:!0};if(r>0)switch(this.mismatchMode){case z.FAIL:throw new Error(`Zipped streams should have the same length. Mismatched at element ${this.count}.`);case z.SHORTEST:return{value:null,done:!0};case z.LONGEST:}return this.count++,{value:s,done:!1}}async next(){return this.currentPromise=this.nextState(this.currentPromise),this.currentPromise}}class Y extends j{constructor(t,e){super(),this.upstream=t,this.bufferSize=e,this.buffer=new D(e)}summary(){return`${this.upstream.summary()} -> Prefetch`}refill(){for(;!this.buffer.isFull();){const t=this.upstream.next();this.buffer.push(t)}}next(){return this.refill(),this.buffer.shift()}}class K extends Y{constructor(t,r,s){super(t,r),this.upstream=t,this.windowSize=r,this.upstreamExhausted=!1,this.random=E(s||e.now().toString()),this.lastRead=Promise.resolve({value:null,done:!1})}async next(){return this.lastRead=this.lastRead.then((()=>this.serialNext())),this.lastRead}randomInt(t){return Math.floor(this.random()*t)}chooseIndex(){return this.randomInt(this.buffer.length())}async serialNext(){for(this.upstreamExhausted||this.refill();!this.buffer.isEmpty();){const t=this.chooseIndex(),e=await this.buffer.shuffleExcise(t);if(!e.done)return this.refill(),e;this.upstreamExhausted=!0}return{value:null,done:!0}}}class tt{constructor(){this.size=null}batch(t,r=!0){const s=this;let n;return e.assert(t>0,(()=>`batchSize needs to be positive, but it is\n      ${t}`)),n=this.size===1/0||null==this.size?this.size:r?Math.ceil(this.size/t):Math.floor(this.size/t),et((async()=>(await s.iterator()).columnMajorBatch(t,r,nt)),n)}concatenate(t){const e=this;let r;return r=this.size===1/0||t.size===1/0?1/0:null!=this.size&&null!=t.size?this.size+t.size:null,et((async()=>(await e.iterator()).concatenate(await t.iterator())),r)}filter(t){const e=this;let r;return r=this.size===1/0?1/0:null,et((async()=>(await e.iterator()).filter((e=>n((()=>t(e)))))),r)}async forEachAsync(t){return(await this.iterator()).forEachAsync(t)}map(t){const e=this;return et((async()=>(await e.iterator()).map((e=>n((()=>t(e)))))),this.size)}mapAsync(t){const e=this;return et((async()=>(await e.iterator()).mapAsync(t)),this.size)}prefetch(t){if(null==t)throw new RangeError("`Dataset.prefetch()` requires bufferSize to be specified.");const e=this;return et((async()=>(await e.iterator()).prefetch(t)),this.size)}repeat(t){const e=this;let r;return r=null!=this.size&&t>0?this.size*t:0===t?0:null!=this.size&&(void 0===t||t<0)?1/0:null,et((async()=>{const r=$((async()=>({value:await e.iterator(),done:!1})));return s=r.take(t),new Z(s,n);var s,n}),r)}skip(t){const e=this;let r;return r=null!=this.size&&t>=0&&this.size>=t?this.size-t:null!=this.size&&(this.size<t||void 0===t||t<0)?0:null,et((async()=>(await e.iterator()).skip(t)),r)}shuffle(t,r,s=!0){if(null==t||t<0)throw null==this.size?new RangeError("`Dataset.shuffle()` requires bufferSize to be specified."):new RangeError(`\`Dataset.shuffle()\` requires bufferSize to be specified.  If your data fits in main memory (for regular JS objects), and/or GPU memory (for \`tf.Tensor\`s), consider setting bufferSize to the dataset size (${this.size} elements)`);const n=this,i=E(r||e.now().toString());return et((async()=>{let e=i.int32();return s&&(e+=i.int32()),(await n.iterator()).shuffle(t,e.toString())}),this.size)}take(t){const e=this;let r;return r=null!=this.size&&this.size>t?t:null!=this.size&&this.size<=t?this.size:null,et((async()=>(await e.iterator()).take(t)),r)}async toArray(){if(this.size===1/0)throw new Error("Can not convert infinite data stream to array.");return(await this.iterator()).toArray()}async toArrayForTest(){if(this.size===1/0)throw new Error("Can not convert infinite data stream to array.");return(await this.iterator()).toArrayForTest()}}function et(t,e=null){return new class extends tt{constructor(){super(...arguments),this.size=e}async iterator(){return t()}}}function rt(t){return et((async()=>O(t)),t.length)}function st(t){if(!k(t))throw new Error("The argument to zip() must be an object or array.");let e;if(Array.isArray(t))for(let r=0;r<t.length;r++)e=null==e?t[r].size:Math.min(e,t[r].size);else if(t instanceof Object)for(const r in t)e=null==e?t[r].size:Math.min(e,t[r].size);return et((async()=>function(t,e=z.FAIL){return new J(t,e)}(await F(t,(t=>{if(t instanceof tt)return{value:t.iterator(),recurse:!1};if(k(t))return{value:null,recurse:!0};throw new Error("Leaves of the structure passed to zip() must be Datasets, not primitives.")})),z.SHORTEST)),e)}function nt(r){if(null===r)return null;const s=r[0];if(null==(n=s)||null===(o=n)||"object"!=typeof o&&"function"!=typeof o||Array.isArray(n)||"object"==typeof n&&n instanceof t||e.isTypedArray(n)){return{value:function(e){if(0===e.length)throw new Error("Can't make a batch of zero elements.");return e[0]instanceof t?i(e):a(e)}(r),recurse:!1}}var n,o;return{value:null,recurse:!0}}tt.MAX_BUFFER_SIZE=1e4;class it extends tt{constructor(t){super(),this.input=t}async iterator(){return(await this.input.iterator()).decodeUTF8().split("\n").map((t=>(t.endsWith("\r")&&(t=t.slice(0,-1)),t)))}}const at=Symbol("out"),ot=Symbol("field"),ut=Symbol("quote"),ht=Symbol("quoteafterquote"),lt=Symbol("quoteinquote");class ct extends tt{constructor(t,r){super(),this.input=t,this.hasHeader=!0,this.fullColumnNames=null,this.columnNamesValidated=!1,this.columnConfigs=null,this.configuredColumnsOnly=!1,this.delimiter=",",this.delimWhitespace=!1,this.base=new it(t),r||(r={}),this.hasHeader=!1!==r.hasHeader,this.fullColumnNames=r.columnNames,this.columnConfigs=r.columnConfigs,this.configuredColumnsOnly=r.configuredColumnsOnly,r.delimWhitespace?(e.assert(null==r.delimiter,(()=>"Delimiter should not be provided when delimWhitespace is true.")),this.delimWhitespace=!0,this.delimiter=" "):this.delimiter=r.delimiter?r.delimiter:","}async columnNames(){return this.columnNamesValidated||await this.setColumnNames(),this.configuredColumnsOnly?Object.keys(this.columnConfigs):this.fullColumnNames}async setColumnNames(){const t=await this.maybeReadHeaderLine();if(!this.fullColumnNames&&!t)throw new Error("Column names must be provided if there is no header line.");this.fullColumnNames&&t&&e.assert(t.length===this.fullColumnNames.length,(()=>"The length of provided columnNames ("+this.fullColumnNames.length.toString()+") does not match the length of the header line read from file ("+t.length.toString()+").")),this.fullColumnNames||(this.fullColumnNames=t);const r=this.fullColumnNames.reduce(((t,e)=>(t[e]=t[e]+1||1,t)),{}),s=Object.keys(r).filter((t=>r[t]>1));if(e.assert(0===s.length,(()=>"Duplicate column names found: "+s.toString())),this.columnConfigs)for(const t of Object.keys(this.columnConfigs)){if(-1===this.fullColumnNames.indexOf(t))throw new Error('The key "'+t+'" provided in columnConfigs does not match any of the column names ('+this.fullColumnNames.toString()+").")}this.columnNamesValidated=!0}async maybeReadHeaderLine(){if(this.hasHeader){const t=await this.base.iterator(),e=await t.next();if(e.done)throw new Error("No data was found for CSV parsing.");const r=e.value;return this.parseRow(r,!1)}return null}async iterator(){this.columnNamesValidated||await this.setColumnNames();let t=await this.base.iterator();return this.hasHeader&&(t=t.skip(1)),t.map((t=>this.makeDataElement(t)))}makeDataElement(t){const e=this.parseRow(t),r={},s={};for(let n=0;n<this.fullColumnNames.length;n++){const i=this.fullColumnNames[n],a=this.columnConfigs?this.columnConfigs[i]:null;if(!this.configuredColumnsOnly||a){const o=e[n];let u=null;if(""===o)if(a&&void 0!==a.default)u=a.default;else{if(a&&(a.required||a.isLabel))throw new Error(`Required column ${i} is empty in this line: ${t}`);u=void 0}else{const t=Number(o);if(isNaN(t))u=a&&"bool"===a.dtype?this.getBoolean(o):o;else if(a&&a.dtype)switch(a.dtype){case"float32":u=t;break;case"int32":u=Math.floor(t);break;case"bool":u=this.getBoolean(o);break;default:u=t}else u=t}a&&a.isLabel?s[i]=u:r[i]=u}}return 0===Object.keys(s).length?r:{xs:r,ys:s}}getBoolean(t){return"1"===t||"true"===t.toLowerCase()?1:0}parseRow(t,e=!0){const r=[];let s=0;const n=t.length;let i=at;for(let e=0;e<n;e++)switch(i){case at:switch(t.charAt(e)){case'"':s=e+1,i=ut;break;case this.delimiter:if(s=e+1," "===this.delimiter&&this.delimWhitespace)break;r.push(""),i=at;break;default:i=ot,s=e}break;case ot:switch(t.charAt(e)){case this.delimiter:r.push(t.substring(s,e)),i=at,s=e+1}break;case ut:switch(t.charAt(e)){case'"':i=ht}break;case ht:switch(t.charAt(e)){case this.delimiter:r.push(t.substring(s,e-1)),i=at,s=e+1;break;case'"':i=ut;break;default:i=lt}break;case lt:switch(t.charAt(e)){case'"':i=ut}}if(i===ht?r.push(t.substring(s,n-1)):r.push(t.substring(s)),e&&r.length!==this.fullColumnNames.length)throw new Error(`Invalid row in csv file. Should have ${this.fullColumnNames.length} elements in a row, but got ${r}`);return r}}class ft extends j{constructor(t){super(),this.microphoneConfig=t,this.isClosed=!1,this.fftSize=t.fftSize||1024;const e=Math.log2(this.fftSize);if(this.fftSize<0||e<4||e>14||!Number.isInteger(e))throw new Error(`Invalid fftSize: it must be a power of 2 between 2 to 4 and 2 to 14, but got ${this.fftSize}`);if(this.numFrames=t.numFramesPerSpectrogram||43,this.sampleRateHz=t.sampleRateHz,this.columnTruncateLength=t.columnTruncateLength||this.fftSize,this.audioTrackConstraints=t.audioTrackConstraints,this.smoothingTimeConstant=t.smoothingTimeConstant||0,this.includeSpectrogram=!1!==t.includeSpectrogram,this.includeWaveform=!0===t.includeWaveform,!this.includeSpectrogram&&!this.includeWaveform)throw new Error("Both includeSpectrogram and includeWaveform are false. At least one type of data should be returned.")}summary(){return"microphone"}static async create(t={}){if(o().get("IS_NODE"))throw new Error("microphone API is only supported in browser environment.");const e=new ft(t);return await e.start(),e}async start(){try{this.stream=await navigator.mediaDevices.getUserMedia({audio:null==this.audioTrackConstraints||this.audioTrackConstraints,video:!1})}catch(t){throw new Error(`Error thrown while initializing video stream: ${t.message}`)}if(!this.stream)throw new Error("Could not obtain audio from microphone.");const t=window.AudioContext||window.webkitAudioContext;if(this.audioContext=new t,this.sampleRateHz){if(this.audioContext.sampleRate!==this.sampleRateHz)throw new Error(`Mismatch in sampling rate: Expected: ${this.sampleRateHz}; Actual: ${this.audioContext.sampleRate}`)}else this.sampleRateHz=this.audioContext.sampleRate;const e=this.audioContext.createMediaStreamSource(this.stream);this.analyser=this.audioContext.createAnalyser(),this.analyser.fftSize=2*this.fftSize,this.analyser.smoothingTimeConstant=this.smoothingTimeConstant,e.connect(this.analyser),this.freqData=new Float32Array(this.fftSize),this.timeData=new Float32Array(this.fftSize)}async next(){if(this.isClosed)return{value:null,done:!0};let t,e;const r=await this.getAudioData();if(this.includeSpectrogram){const e=this.flattenQueue(r.freqDataQueue);t=this.getTensorFromAudioDataArray(e,[this.numFrames,this.columnTruncateLength,1])}if(this.includeWaveform){const t=this.flattenQueue(r.timeDataQueue);e=this.getTensorFromAudioDataArray(t,[this.numFrames*this.fftSize,1])}return{value:{spectrogram:t,waveform:e},done:!1}}async capture(){return(await this.next()).value}async getAudioData(){const t=[],e=[];let r=0;return new Promise((s=>{const n=setInterval((()=>{this.includeSpectrogram&&(this.analyser.getFloatFrequencyData(this.freqData),this.freqData[0]===-1/0&&s({freqDataQueue:t,timeDataQueue:e}),t.push(this.freqData.slice(0,this.columnTruncateLength))),this.includeWaveform&&(this.analyser.getFloatTimeDomainData(this.timeData),e.push(this.timeData.slice())),++r===this.numFrames&&(clearInterval(n),s({freqDataQueue:t,timeDataQueue:e}))}),this.fftSize/this.sampleRateHz*1e3)}))}stop(){this.isClosed||(this.isClosed=!0,this.analyser.disconnect(),this.audioContext.close(),null!=this.stream&&this.stream.getTracks().length>0&&this.stream.getTracks()[0].stop())}toArray(){throw new Error("Can not convert infinite audio stream to array.")}getSampleRate(){return this.sampleRateHz}flattenQueue(t){const e=t[0].length,r=new Float32Array(t.length*e);return t.forEach(((t,s)=>r.set(t,s*e))),r}getTensorFromAudioDataArray(t,r){const s=new Float32Array(e.sizeFromShape(r));return s.set(t,s.length-t.length),a(s,r)}}class mt extends j{constructor(t,e){if(super(),this.webcamVideoElement=t,this.webcamConfig=e,this.isClosed=!0,this.resize=!1,this.needToResize())if(this.resize=!0,this.cropSize=[this.webcamConfig.resizeHeight,this.webcamConfig.resizeWidth],this.cropBoxInd=u([0],"int32"),this.webcamConfig.centerCrop){const t=1*this.webcamConfig.resizeWidth/this.webcamVideoElement.width,e=1*this.webcamConfig.resizeHeight/this.webcamVideoElement.height,r=(1-t)/2,s=(1-e)/2,n=r+t,i=e+s;this.cropBox=h([s,r,i,n],[1,4])}else this.cropBox=h([0,0,1,1],[1,4])}summary(){return"webcam"}static async create(t,e={}){if(o().get("IS_NODE"))throw new Error("tf.data.webcam is only supported in browser environment.");if(!t){if(t=document.createElement("video"),!e.resizeWidth||!e.resizeHeight)throw new Error("Please provide webcam video element, or resizeWidth and resizeHeight to create a hidden video element.");t.width=e.resizeWidth,t.height=e.resizeHeight}const r=new mt(t,e);return await r.start(),r}async start(){this.webcamConfig.facingMode&&e.assert("user"===this.webcamConfig.facingMode||"environment"===this.webcamConfig.facingMode,(()=>`Invalid webcam facing mode: ${this.webcamConfig.facingMode}. Please provide 'user' or 'environment'`));try{this.stream=await navigator.mediaDevices.getUserMedia({video:{deviceId:this.webcamConfig.deviceId,facingMode:this.webcamConfig.facingMode?this.webcamConfig.facingMode:"user",width:this.webcamVideoElement.width,height:this.webcamVideoElement.height}})}catch(t){throw t.message=`Error thrown while initializing video stream: ${t.message}`,t}if(!this.stream)throw new Error("Could not obtain video from webcam.");try{this.webcamVideoElement.srcObject=this.stream}catch(t){console.log(t),this.webcamVideoElement.src=window.URL.createObjectURL(this.stream)}return this.webcamVideoElement.play(),this.isClosed=!1,new Promise((t=>{this.webcamVideoElement.onloadedmetadata=()=>{t()}}))}async next(){if(this.isClosed)return{value:null,done:!0};let t;try{t=l.fromPixels(this.webcamVideoElement)}catch(t){throw new Error(`Error thrown converting video to pixels: ${JSON.stringify(t)}`)}if(!this.resize)return{value:t,done:!1};try{return{value:this.cropAndResizeFrame(t),done:!1}}catch(t){throw new Error(`Error thrown cropping the video: ${t.message}`)}finally{t.dispose()}}needToResize(){return!(!this.webcamConfig.resizeWidth||!this.webcamConfig.resizeHeight||this.webcamVideoElement.width===this.webcamConfig.resizeWidth&&this.webcamVideoElement.height===this.webcamConfig.resizeHeight)}cropAndResizeFrame(t){return n((()=>{const e=c(f(t,"float32"),0);let r;r=m.cropAndResize(e,this.cropBox,this.cropBoxInd,this.cropSize,"bilinear");const s=r.shape;return d(r,s.slice(1))}))}async capture(){return(await this.next()).value}stop(){this.stream.getTracks().forEach((t=>t.stop()));try{this.webcamVideoElement.srcObject=null}catch(t){console.log(t),this.webcamVideoElement.src=null}this.isClosed=!0}toArray(){throw new Error("Can not convert infinite video stream to array.")}}class dt{}class pt extends j{split(t){return new wt(this,t)}}class wt extends pt{constructor(t,e){super(),this.upstream=t,this.impl=new yt(t,e)}summary(){return this.impl.summary()}async next(){return this.impl.next()}}class yt extends X{constructor(t,e){super(),this.upstream=t,this.separator=e,this.carryover=""}summary(){return`${this.upstream.summary()} -> Split('${this.separator}')`}async pump(){const t=await this.upstream.next();if(t.done)return""!==this.carryover&&(this.outputQueue.push(this.carryover),this.carryover="",!0);const e=t.value.split(this.separator);e[0]=this.carryover+e[0];for(const t of e.slice(0,-1))this.outputQueue.push(t);return this.carryover=e[e.length-1],!0}}class gt extends j{decodeUTF8(){return new xt(this)}}class xt extends pt{constructor(t){super(),this.upstream=t,this.impl=new vt(t)}summary(){return this.impl.summary()}async next(){return this.impl.next()}}class vt extends X{constructor(t){if(super(),this.upstream=t,o().get("IS_BROWSER"))this.decoder=new TextDecoder("utf-8");else{const{StringDecoder:t}=require("string_decoder");this.decoder=new t("utf8")}}summary(){return`${this.upstream.summary()} -> Utf8`}async pump(){const t=await this.upstream.next();let e,r;return!t.done&&(e=t.value,r=o().get("IS_BROWSER")?this.decoder.decode(e,{stream:!0}):this.decoder.write(Buffer.from(e.buffer)),this.outputQueue.push(r),!0)}}class bt extends gt{constructor(t,r={}){super(),this.file=t,this.options=r,e.assert(t instanceof Uint8Array||!!o().get("IS_BROWSER")&&(t instanceof File||t instanceof Blob),(()=>"FileChunkIterator only supports File, Blob and Uint8Array right now.")),this.offset=r.offset||0,this.chunkSize=r.chunkSize||1048576}summary(){return`FileChunks ${this.file}`}async next(){if(this.offset>=(this.file instanceof Uint8Array?this.file.byteLength:this.file.size))return{value:null,done:!0};const t=new Promise(((t,e)=>{const r=this.offset+this.chunkSize;if(this.file instanceof Uint8Array)t(new Uint8Array(this.file.slice(this.offset,r)));else{const s=new FileReader;s.onload=r=>{let n=s.result;if(n instanceof ArrayBuffer&&(n=new Uint8Array(n)),!(n instanceof Uint8Array))return e(new TypeError("FileReader returned unknown type."));t(n)},s.onabort=t=>e(new Error("Aborted")),s.onerror=t=>e(new Error(t.type));const n=this.file.slice(this.offset,r);s.readAsArrayBuffer(n)}this.offset=r}));return{value:await t,done:!1}}}const Ct=t=>({method:t.method,headers:t.headers,body:t.body,mode:t.mode,credentials:t.credentials,cache:t.cache,redirect:t.redirect,referrer:t.referrer,integrity:t.integrity});function zt(t){return"string"==typeof t&&"file://"===t.substr(0,7)}class Et extends dt{constructor(t,e={}){super(),this.input=t,this.options=e}async iterator(){if(zt(this.input)&&o().get("IS_NODE")){const t=require("fs");this.input=t.readFileSync(this.input.substr(7))}return new bt(this.input,this.options)}}class At extends dt{constructor(t,e={}){super(),this.url=t,this.fileOptions=e}async iterator(){return zt(this.url)?new Et(this.url,this.fileOptions).iterator():async function(t,r={}){let s,n;"string"==typeof t?s=t:(s=t.url,n=Ct(t));const i=await e.fetch(s,n);if(i.ok){const t=new Uint8Array(await i.arrayBuffer());return new bt(t,r)}throw new Error(i.statusText)}(this.url,this.fileOptions)}}function St(t,e={}){return new ct(new At(t),e)}function Rt(t){const e=$(t);return et((async()=>e))}function Tt(t){return et((async()=>{const e=await t();return $((()=>e.next()))}))}async function Ft(t,e){return mt.create(t,e)}async function kt(t){return ft.create(t)}const Nt="3.6.0";export{ct as CSVDataset,tt as Dataset,Et as FileDataSource,it as TextLineDataset,At as URLDataSource,rt as array,St as csv,Rt as func,Tt as generator,kt as microphone,Nt as version_data,Ft as webcam,st as zip};
 //# sourceMappingURL=tf-data.fesm.min.js.map

dist/tf-data.min.js

@@ -17,3 +17,3 @@ /**
  */
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o(this,(function(n){switch(n.label){case 0:return this.hasHeader?[4,this.base.iterator()]:[3,3];case 1:return[4,n.sent().next()];case 2:if((t=n.sent()).done)throw new Error("No data was found for CSV parsing.");return e=t.value,[2,this.parseRow(e,!1)];case 3:return[2,null]}}))}))},n.prototype.iterator=function(){return i(this,void 0,void 0,(function(){var t,e=this;return o(this,(function(n){switch(n.label){case 0:return this.columnNamesValidated?[3,2]:[4,this.setColumnNames()];case 1:n.sent(),n.label=2;case 2:return[4,this.base.iterator()];case 3:return t=n.sent(),this.hasHeader&&(t=t.skip(1)),[2,t.map((function(t){return e.makeDataElement(t)}))]}}))}))},n.prototype.makeDataElement=function(t){for(var e=this.parseRow(t),n={},r={},i=0;i<this.fullColumnNames.length;i++){var o=this.fullColumnNames[i],s=this.columnConfigs?this.columnConfigs[o]:null;if(!this.configuredColumnsOnly||s){var u=e[i],a=null;if(""===u)if(s&&void 0!==s.default)a=s.default;else{if(s&&(s.required||s.isLabel))throw new Error("Required column "+o+" is empty in this line: "+t);a=void 0}else{var c=Number(u);if(isNaN(c))a=s&&"bool"===s.dtype?this.getBoolean(u):u;else if(s&&s.dtype)switch(s.dtype){case"float32":a=c;break;case"int32":a=Math.floor(c);break;case"bool":a=this.getBoolean(u);break;default:a=c}else a=c}s&&s.isLabel?r[o]=a:n[o]=a}}return 0===Object.keys(r).length?n:{xs:n,ys:r}},n.prototype.getBoolean=function(t){return"1"===t||"true"===t.toLowerCase()?1:0},n.prototype.parseRow=function(t,e){void 0===e&&(e=!0);for(var n=[],r=0,i=t.length,o=J,s=0;s<i;s++)switch(o){case J:switch(t.charAt(s)){case Z:r=s+1,o=K;break;case this.delimiter:if(r=s+1," "===this.delimiter&&this.delimWhitespace)break;n.push(""),o=J;break;default:o=Y,r=s}break;case Y:switch(t.charAt(s)){case this.delimiter:n.push(t.substring(r,s)),o=J,r=s+1}break;case K:switch(t.charAt(s)){case Z:o=$}break;case $:switch(t.charAt(s)){case this.delimiter:n.push(t.substring(r,s-1)),o=J,r=s+1;break;case Z:o=K;break;default:o=tt}break;case tt:switch(t.charAt(s)){case Z:o=K}}if(o===$?n.push(t.substring(r,i-1)):n.push(t.substring(r)),e&&n.length!==this.fullColumnNames.length)throw new Error("Invalid row in csv file. Should have "+this.fullColumnNames.length+" elements in a row, but got "+n);return n},n}(U),nt=function(t){function n(e){var n=t.call(this)||this;n.microphoneConfig=e,n.isClosed=!1,n.fftSize=e.fftSize||1024;var r=Math.log2(n.fftSize);if(n.fftSize<0||r<4||r>14||!Number.isInteger(r))throw new Error("Invalid fftSize: it must be a power of 2 between 2 to 4 and 2 to 14, but got "+n.fftSize);if(n.numFrames=e.numFramesPerSpectrogram||43,n.sampleRateHz=e.sampleRateHz,n.columnTruncateLength=e.columnTruncateLength||n.fftSize,n.audioTrackConstraints=e.audioTrackConstraints,n.smoothingTimeConstant=e.smoothingTimeConstant||0,n.includeSpectrogram=!1!==e.includeSpectrogram,n.includeWaveform=!0===e.includeWaveform,!n.includeSpectrogram&&!n.includeWaveform)throw new Error("Both includeSpectrogram and includeWaveform are false. 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Actual: "+this.audioContext.sampleRate)}else this.sampleRateHz=this.audioContext.sampleRate;return r=this.audioContext.createMediaStreamSource(this.stream),this.analyser=this.audioContext.createAnalyser(),this.analyser.fftSize=2*this.fftSize,this.analyser.smoothingTimeConstant=this.smoothingTimeConstant,r.connect(this.analyser),this.freqData=new Float32Array(this.fftSize),this.timeData=new Float32Array(this.fftSize),[2]}}))}))},n.prototype.next=function(){return i(this,void 0,void 0,(function(){var t,e,n,r,i;return o(this,(function(o){switch(o.label){case 0:return this.isClosed?[2,{value:null,done:!0}]:[4,this.getAudioData()];case 1:return n=o.sent(),this.includeSpectrogram&&(r=this.flattenQueue(n.freqDataQueue),t=this.getTensorFromAudioDataArray(r,[this.numFrames,this.columnTruncateLength,1])),this.includeWaveform&&(i=this.flattenQueue(n.timeDataQueue),e=this.getTensorFromAudioDataArray(i,[this.numFrames*this.fftSize,1])),[2,{value:{spectrogram:t,waveform:e},done:!1}]}}))}))},n.prototype.capture=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){switch(t.label){case 0:return[4,this.next()];case 1:return[2,t.sent().value]}}))}))},n.prototype.getAudioData=function(){return i(this,void 0,void 0,(function(){var t,e,n,r=this;return o(this,(function(i){return t=[],e=[],n=0,[2,new Promise((function(i){var o=setInterval((function(){r.includeSpectrogram&&(r.analyser.getFloatFrequencyData(r.freqData),r.freqData[0]===-1/0&&i({freqDataQueue:t,timeDataQueue:e}),t.push(r.freqData.slice(0,r.columnTruncateLength))),r.includeWaveform&&(r.analyser.getFloatTimeDomainData(r.timeData),e.push(r.timeData.slice())),++n===r.numFrames&&(clearInterval(o),i({freqDataQueue:t,timeDataQueue:e}))}),r.fftSize/r.sampleRateHz*1e3)}))]}))}))},n.prototype.stop=function(){this.isClosed||(this.isClosed=!0,this.analyser.disconnect(),this.audioContext.close(),null!=this.stream&&this.stream.getTracks().length>0&&this.stream.getTracks()[0].stop())},n.prototype.toArray=function(){throw new Error("Can not convert infinite audio stream to array.")},n.prototype.getSampleRate=function(){return this.sampleRateHz},n.prototype.flattenQueue=function(t){var e=t[0].length,n=new Float32Array(t.length*e);return t.forEach((function(t,r){return n.set(t,r*e)})),n},n.prototype.getTensorFromAudioDataArray=function(t,n){var r=new Float32Array(e.util.sizeFromShape(n));return r.set(t,r.length-t.length),e.tensor(r,n)},n}(T),rt=function(t){function n(n,r){var i=t.call(this)||this;if(i.webcamVideoElement=n,i.webcamConfig=r,i.isClosed=!0,i.resize=!1,i.needToResize())if(i.resize=!0,i.cropSize=[i.webcamConfig.resizeHeight,i.webcamConfig.resizeWidth],i.cropBoxInd=e.tensor1d([0],"int32"),i.webcamConfig.centerCrop){var o=1*i.webcamConfig.resizeWidth/i.webcamVideoElement.width,s=1*i.webcamConfig.resizeHeight/i.webcamVideoElement.height,u=(1-o)/2,a=(1-s)/2,c=u+o,h=s+a;i.cropBox=e.tensor2d([a,u,h,c],[1,4])}else i.cropBox=e.tensor2d([0,0,1,1],[1,4]);return i}return r(n,t),n.prototype.summary=function(){return"webcam"},n.create=function(t,r){return void 0===r&&(r={}),i(this,void 0,void 0,(function(){var i;return o(this,(function(o){switch(o.label){case 0:if(e.env().get("IS_NODE"))throw new Error("tf.data.webcam is only supported in browser environment.");if(!t){if(t=document.createElement("video"),!r.resizeWidth||!r.resizeHeight)throw new Error("Please provide webcam video element, or resizeWidth and resizeHeight to create a hidden video element.");t.width=r.resizeWidth,t.height=r.resizeHeight}return[4,(i=new n(t,r)).start()];case 1:return o.sent(),[2,i]}}))}))},n.prototype.start=function(){return i(this,void 0,void 0,(function(){var t,n,r=this;return o(this,(function(i){switch(i.label){case 0:this.webcamConfig.facingMode&&e.util.assert("user"===this.webcamConfig.facingMode||"environment"===this.webcamConfig.facingMode,(function(){return"Invalid webcam facing mode: "+r.webcamConfig.facingMode+". 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o(this,(function(n){if(this.isClosed)return[2,{value:null,done:!0}];try{t=e.browser.fromPixels(this.webcamVideoElement)}catch(t){throw new Error("Error thrown converting video to pixels: "+JSON.stringify(t))}if(!this.resize)return[2,{value:t,done:!1}];try{return[2,{value:this.cropAndResizeFrame(t),done:!1}]}catch(t){throw new Error("Error thrown cropping the video: "+t.message)}finally{t.dispose()}return[2]}))}))},n.prototype.needToResize=function(){return!(!this.webcamConfig.resizeWidth||!this.webcamConfig.resizeHeight||this.webcamVideoElement.width===this.webcamConfig.resizeWidth&&this.webcamVideoElement.height===this.webcamConfig.resizeHeight)},n.prototype.cropAndResizeFrame=function(t){var n=this;return e.tidy((function(){var r,i=e.expandDims(e.cast(t,"float32"),0),o=(r=e.image.cropAndResize(i,n.cropBox,n.cropBoxInd,n.cropSize,"bilinear")).shape;return e.reshape(r,o.slice(1))}))},n.prototype.capture=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){switch(t.label){case 0:return[4,this.next()];case 1:return[2,t.sent().value]}}))}))},n.prototype.stop=function(){this.stream.getTracks().forEach((function(t){return t.stop()}));try{this.webcamVideoElement.srcObject=null}catch(t){console.log(t),this.webcamVideoElement.src=null}this.isClosed=!0},n.prototype.toArray=function(){throw new Error("Can not convert infinite video stream to array.")},n}(T),it=function(){},ot=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return r(e,t),e.prototype.split=function(t){return new st(this,t)},e}(T),st=function(t){function e(e,n){var r=t.call(this)||this;return r.upstream=e,r.impl=new ut(e,n),r}return r(e,t),e.prototype.summary=function(){return this.impl.summary()},e.prototype.next=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){return[2,this.impl.next()]}))}))},e}(ot),ut=function(t){function e(e,n){var r=t.call(this)||this;return r.upstream=e,r.separator=n,r.carryover="",r}return r(e,t),e.prototype.summary=function(){return this.upstream.summary()+" -> Split('"+this.separator+"')"},e.prototype.pump=function(){return i(this,void 0,void 0,(function(){var t,e,n,r,i;return o(this,(function(o){switch(o.label){case 0:return[4,this.upstream.next()];case 1:if((t=o.sent()).done)return""===this.carryover?[2,!1]:(this.outputQueue.push(this.carryover),this.carryover="",[2,!0]);for((e=t.value.split(this.separator))[0]=this.carryover+e[0],n=0,r=e.slice(0,-1);n<r.length;n++)i=r[n],this.outputQueue.push(i);return this.carryover=e[e.length-1],[2,!0]}}))}))},e}(q),at=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return r(e,t),e.prototype.decodeUTF8=function(){return new ct(this)},e}(T),ct=function(t){function e(e){var n=t.call(this)||this;return n.upstream=e,n.impl=new ht(e),n}return r(e,t),e.prototype.summary=function(){return this.impl.summary()},e.prototype.next=function(){return i(this,void 0,void 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1:return[2,(e.value=r.sent(),e.done=!1,e)]}}))}))},n}(at);function ft(t,n){return void 0===n&&(n={}),i(this,void 0,void 0,(function(){var r,i,s,u,a;return o(this,(function(o){switch(o.label){case 0:return"string"==typeof t?r=t:(r=t.url,i=dt(t)),[4,e.util.fetch(r,i)];case 1:return(s=o.sent()).ok?(a=Uint8Array.bind,[4,s.arrayBuffer()]):[3,3];case 2:return u=new(a.apply(Uint8Array,[void 0,o.sent()])),[2,new lt(u,n)];case 3:throw new Error(s.statusText)}}))}))}var dt=function(t){return{method:t.method,headers:t.headers,body:t.body,mode:t.mode,credentials:t.credentials,cache:t.cache,redirect:t.redirect,referrer:t.referrer,integrity:t.integrity}};function pt(t){return"string"==typeof t&&"file://"===t.substr(0,7)}var vt=function(t){function n(e,n){void 0===n&&(n={});var r=t.call(this)||this;return r.input=e,r.options=n,r}return r(n,t),n.prototype.iterator=function(){return i(this,void 0,void 0,(function(){var t;return o(this,(function(n){return 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G(n),r||(r={}),i.hasHeader=!1!==r.hasHeader,i.fullColumnNames=r.columnNames,i.columnConfigs=r.columnConfigs,i.configuredColumnsOnly=r.configuredColumnsOnly,r.delimWhitespace?(e.util.assert(null==r.delimiter,(function(){return"Delimiter should not be provided when delimWhitespace is true."})),i.delimWhitespace=!0,i.delimiter=" "):i.delimiter=r.delimiter?r.delimiter:",",i}return r(n,t),n.prototype.columnNames=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){switch(t.label){case 0:return this.columnNamesValidated?[3,2]:[4,this.setColumnNames()];case 1:t.sent(),t.label=2;case 2:return[2,this.configuredColumnsOnly?Object.keys(this.columnConfigs):this.fullColumnNames]}}))}))},n.prototype.setColumnNames=function(){return i(this,void 0,void 0,(function(){var t,n,r,i,s,u,a=this;return o(this,(function(o){switch(o.label){case 0:return[4,this.maybeReadHeaderLine()];case 1:if(t=o.sent(),!this.fullColumnNames&&!t)throw new Error("Column names must be provided if there is no header line.");if(this.fullColumnNames&&t&&e.util.assert(t.length===this.fullColumnNames.length,(function(){return"The length of provided columnNames ("+a.fullColumnNames.length.toString()+") does not match the length of the header line read from file ("+t.length.toString()+")."})),this.fullColumnNames||(this.fullColumnNames=t),n=this.fullColumnNames.reduce((function(t,e){return t[e]=t[e]+1||1,t}),{}),r=Object.keys(n).filter((function(t){return n[t]>1})),e.util.assert(0===r.length,(function(){return"Duplicate column names found: "+r.toString()})),this.columnConfigs)for(i=0,s=Object.keys(this.columnConfigs);i<s.length;i++)if(u=s[i],-1===this.fullColumnNames.indexOf(u))throw new Error('The key "'+u+'" provided in columnConfigs does not match any of the column names ('+this.fullColumnNames.toString()+").");return this.columnNamesValidated=!0,[2]}}))}))},n.prototype.maybeReadHeaderLine=function(){return i(this,void 0,void 0,(function(){var t,e;return o(this,(function(n){switch(n.label){case 0:return this.hasHeader?[4,this.base.iterator()]:[3,3];case 1:return[4,n.sent().next()];case 2:if((t=n.sent()).done)throw new Error("No data was found for CSV parsing.");return e=t.value,[2,this.parseRow(e,!1)];case 3:return[2,null]}}))}))},n.prototype.iterator=function(){return i(this,void 0,void 0,(function(){var t,e=this;return o(this,(function(n){switch(n.label){case 0:return this.columnNamesValidated?[3,2]:[4,this.setColumnNames()];case 1:n.sent(),n.label=2;case 2:return[4,this.base.iterator()];case 3:return t=n.sent(),this.hasHeader&&(t=t.skip(1)),[2,t.map((function(t){return e.makeDataElement(t)}))]}}))}))},n.prototype.makeDataElement=function(t){for(var e=this.parseRow(t),n={},r={},i=0;i<this.fullColumnNames.length;i++){var o=this.fullColumnNames[i],s=this.columnConfigs?this.columnConfigs[o]:null;if(!this.configuredColumnsOnly||s){var u=e[i],a=null;if(""===u)if(s&&void 0!==s.default)a=s.default;else{if(s&&(s.required||s.isLabel))throw new Error("Required column "+o+" is empty in this line: "+t);a=void 0}else{var c=Number(u);if(isNaN(c))a=s&&"bool"===s.dtype?this.getBoolean(u):u;else if(s&&s.dtype)switch(s.dtype){case"float32":a=c;break;case"int32":a=Math.floor(c);break;case"bool":a=this.getBoolean(u);break;default:a=c}else a=c}s&&s.isLabel?r[o]=a:n[o]=a}}return 0===Object.keys(r).length?n:{xs:n,ys:r}},n.prototype.getBoolean=function(t){return"1"===t||"true"===t.toLowerCase()?1:0},n.prototype.parseRow=function(t,e){void 0===e&&(e=!0);for(var n=[],r=0,i=t.length,o=J,s=0;s<i;s++)switch(o){case J:switch(t.charAt(s)){case Z:r=s+1,o=K;break;case this.delimiter:if(r=s+1," "===this.delimiter&&this.delimWhitespace)break;n.push(""),o=J;break;default:o=Y,r=s}break;case Y:switch(t.charAt(s)){case this.delimiter:n.push(t.substring(r,s)),o=J,r=s+1}break;case K:switch(t.charAt(s)){case Z:o=$}break;case $:switch(t.charAt(s)){case this.delimiter:n.push(t.substring(r,s-1)),o=J,r=s+1;break;case Z:o=K;break;default:o=tt}break;case tt:switch(t.charAt(s)){case Z:o=K}}if(o===$?n.push(t.substring(r,i-1)):n.push(t.substring(r)),e&&n.length!==this.fullColumnNames.length)throw new Error("Invalid row in csv file. Should have "+this.fullColumnNames.length+" elements in a row, but got "+n);return n},n}(U),nt=function(t){function n(e){var n=t.call(this)||this;n.microphoneConfig=e,n.isClosed=!1,n.fftSize=e.fftSize||1024;var r=Math.log2(n.fftSize);if(n.fftSize<0||r<4||r>14||!Number.isInteger(r))throw new Error("Invalid fftSize: it must be a power of 2 between 2 to 4 and 2 to 14, but got "+n.fftSize);if(n.numFrames=e.numFramesPerSpectrogram||43,n.sampleRateHz=e.sampleRateHz,n.columnTruncateLength=e.columnTruncateLength||n.fftSize,n.audioTrackConstraints=e.audioTrackConstraints,n.smoothingTimeConstant=e.smoothingTimeConstant||0,n.includeSpectrogram=!1!==e.includeSpectrogram,n.includeWaveform=!0===e.includeWaveform,!n.includeSpectrogram&&!n.includeWaveform)throw new Error("Both includeSpectrogram and includeWaveform are false. At least one type of data should be returned.");return n}return r(n,t),n.prototype.summary=function(){return"microphone"},n.create=function(t){return void 0===t&&(t={}),i(this,void 0,void 0,(function(){var r;return o(this,(function(i){switch(i.label){case 0:if(e.env().get("IS_NODE"))throw new Error("microphone API is only supported in browser environment.");return[4,(r=new n(t)).start()];case 1:return i.sent(),[2,r]}}))}))},n.prototype.start=function(){return i(this,void 0,void 0,(function(){var t,e,n,r;return o(this,(function(i){switch(i.label){case 0:return i.trys.push([0,2,,3]),t=this,[4,navigator.mediaDevices.getUserMedia({audio:null==this.audioTrackConstraints||this.audioTrackConstraints,video:!1})];case 1:return t.stream=i.sent(),[3,3];case 2:throw e=i.sent(),new Error("Error thrown while initializing video stream: "+e.message);case 3:if(!this.stream)throw new Error("Could not obtain audio from microphone.");if(n=window.AudioContext||window.webkitAudioContext,this.audioContext=new n,this.sampleRateHz){if(this.audioContext.sampleRate!==this.sampleRateHz)throw new Error("Mismatch in sampling rate: Expected: "+this.sampleRateHz+"; Actual: "+this.audioContext.sampleRate)}else this.sampleRateHz=this.audioContext.sampleRate;return r=this.audioContext.createMediaStreamSource(this.stream),this.analyser=this.audioContext.createAnalyser(),this.analyser.fftSize=2*this.fftSize,this.analyser.smoothingTimeConstant=this.smoothingTimeConstant,r.connect(this.analyser),this.freqData=new Float32Array(this.fftSize),this.timeData=new Float32Array(this.fftSize),[2]}}))}))},n.prototype.next=function(){return i(this,void 0,void 0,(function(){var t,e,n,r,i;return o(this,(function(o){switch(o.label){case 0:return this.isClosed?[2,{value:null,done:!0}]:[4,this.getAudioData()];case 1:return n=o.sent(),this.includeSpectrogram&&(r=this.flattenQueue(n.freqDataQueue),t=this.getTensorFromAudioDataArray(r,[this.numFrames,this.columnTruncateLength,1])),this.includeWaveform&&(i=this.flattenQueue(n.timeDataQueue),e=this.getTensorFromAudioDataArray(i,[this.numFrames*this.fftSize,1])),[2,{value:{spectrogram:t,waveform:e},done:!1}]}}))}))},n.prototype.capture=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){switch(t.label){case 0:return[4,this.next()];case 1:return[2,t.sent().value]}}))}))},n.prototype.getAudioData=function(){return i(this,void 0,void 0,(function(){var t,e,n,r=this;return o(this,(function(i){return t=[],e=[],n=0,[2,new Promise((function(i){var o=setInterval((function(){r.includeSpectrogram&&(r.analyser.getFloatFrequencyData(r.freqData),r.freqData[0]===-1/0&&i({freqDataQueue:t,timeDataQueue:e}),t.push(r.freqData.slice(0,r.columnTruncateLength))),r.includeWaveform&&(r.analyser.getFloatTimeDomainData(r.timeData),e.push(r.timeData.slice())),++n===r.numFrames&&(clearInterval(o),i({freqDataQueue:t,timeDataQueue:e}))}),r.fftSize/r.sampleRateHz*1e3)}))]}))}))},n.prototype.stop=function(){this.isClosed||(this.isClosed=!0,this.analyser.disconnect(),this.audioContext.close(),null!=this.stream&&this.stream.getTracks().length>0&&this.stream.getTracks()[0].stop())},n.prototype.toArray=function(){throw new Error("Can not convert infinite audio stream to array.")},n.prototype.getSampleRate=function(){return this.sampleRateHz},n.prototype.flattenQueue=function(t){var e=t[0].length,n=new Float32Array(t.length*e);return t.forEach((function(t,r){return n.set(t,r*e)})),n},n.prototype.getTensorFromAudioDataArray=function(t,n){var r=new Float32Array(e.util.sizeFromShape(n));return r.set(t,r.length-t.length),e.tensor(r,n)},n}(T),rt=function(t){function n(n,r){var i=t.call(this)||this;if(i.webcamVideoElement=n,i.webcamConfig=r,i.isClosed=!0,i.resize=!1,i.needToResize())if(i.resize=!0,i.cropSize=[i.webcamConfig.resizeHeight,i.webcamConfig.resizeWidth],i.cropBoxInd=e.tensor1d([0],"int32"),i.webcamConfig.centerCrop){var o=1*i.webcamConfig.resizeWidth/i.webcamVideoElement.width,s=1*i.webcamConfig.resizeHeight/i.webcamVideoElement.height,u=(1-o)/2,a=(1-s)/2,c=u+o,h=s+a;i.cropBox=e.tensor2d([a,u,h,c],[1,4])}else i.cropBox=e.tensor2d([0,0,1,1],[1,4]);return i}return r(n,t),n.prototype.summary=function(){return"webcam"},n.create=function(t,r){return void 0===r&&(r={}),i(this,void 0,void 0,(function(){var i;return o(this,(function(o){switch(o.label){case 0:if(e.env().get("IS_NODE"))throw new Error("tf.data.webcam is only supported in browser environment.");if(!t){if(t=document.createElement("video"),!r.resizeWidth||!r.resizeHeight)throw new Error("Please provide webcam video element, or resizeWidth and resizeHeight to create a hidden video element.");t.width=r.resizeWidth,t.height=r.resizeHeight}return[4,(i=new n(t,r)).start()];case 1:return o.sent(),[2,i]}}))}))},n.prototype.start=function(){return i(this,void 0,void 0,(function(){var t,n,r=this;return o(this,(function(i){switch(i.label){case 0:this.webcamConfig.facingMode&&e.util.assert("user"===this.webcamConfig.facingMode||"environment"===this.webcamConfig.facingMode,(function(){return"Invalid webcam facing mode: "+r.webcamConfig.facingMode+". Please provide 'user' or 'environment'"})),i.label=1;case 1:return i.trys.push([1,3,,4]),t=this,[4,navigator.mediaDevices.getUserMedia({video:{deviceId:this.webcamConfig.deviceId,facingMode:this.webcamConfig.facingMode?this.webcamConfig.facingMode:"user",width:this.webcamVideoElement.width,height:this.webcamVideoElement.height}})];case 2:return t.stream=i.sent(),[3,4];case 3:throw(n=i.sent()).message="Error thrown while initializing video stream: "+n.message,n;case 4:if(!this.stream)throw new Error("Could not obtain video from webcam.");try{this.webcamVideoElement.srcObject=this.stream}catch(t){console.log(t),this.webcamVideoElement.src=window.URL.createObjectURL(this.stream)}return this.webcamVideoElement.play(),this.isClosed=!1,[2,new Promise((function(t){r.webcamVideoElement.onloadedmetadata=function(){t()}}))]}}))}))},n.prototype.next=function(){return i(this,void 0,void 0,(function(){var t;return o(this,(function(n){if(this.isClosed)return[2,{value:null,done:!0}];try{t=e.browser.fromPixels(this.webcamVideoElement)}catch(t){throw new Error("Error thrown converting video to pixels: "+JSON.stringify(t))}if(!this.resize)return[2,{value:t,done:!1}];try{return[2,{value:this.cropAndResizeFrame(t),done:!1}]}catch(t){throw new Error("Error thrown cropping the video: "+t.message)}finally{t.dispose()}return[2]}))}))},n.prototype.needToResize=function(){return!(!this.webcamConfig.resizeWidth||!this.webcamConfig.resizeHeight||this.webcamVideoElement.width===this.webcamConfig.resizeWidth&&this.webcamVideoElement.height===this.webcamConfig.resizeHeight)},n.prototype.cropAndResizeFrame=function(t){var n=this;return e.tidy((function(){var r,i=e.expandDims(e.cast(t,"float32"),0),o=(r=e.image.cropAndResize(i,n.cropBox,n.cropBoxInd,n.cropSize,"bilinear")).shape;return e.reshape(r,o.slice(1))}))},n.prototype.capture=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){switch(t.label){case 0:return[4,this.next()];case 1:return[2,t.sent().value]}}))}))},n.prototype.stop=function(){this.stream.getTracks().forEach((function(t){return t.stop()}));try{this.webcamVideoElement.srcObject=null}catch(t){console.log(t),this.webcamVideoElement.src=null}this.isClosed=!0},n.prototype.toArray=function(){throw new Error("Can not convert infinite video stream to array.")},n}(T),it=function(){},ot=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return r(e,t),e.prototype.split=function(t){return new st(this,t)},e}(T),st=function(t){function e(e,n){var r=t.call(this)||this;return r.upstream=e,r.impl=new ut(e,n),r}return r(e,t),e.prototype.summary=function(){return this.impl.summary()},e.prototype.next=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){return[2,this.impl.next()]}))}))},e}(ot),ut=function(t){function e(e,n){var r=t.call(this)||this;return r.upstream=e,r.separator=n,r.carryover="",r}return r(e,t),e.prototype.summary=function(){return this.upstream.summary()+" -> Split('"+this.separator+"')"},e.prototype.pump=function(){return i(this,void 0,void 0,(function(){var t,e,n,r,i;return o(this,(function(o){switch(o.label){case 0:return[4,this.upstream.next()];case 1:if((t=o.sent()).done)return""===this.carryover?[2,!1]:(this.outputQueue.push(this.carryover),this.carryover="",[2,!0]);for((e=t.value.split(this.separator))[0]=this.carryover+e[0],n=0,r=e.slice(0,-1);n<r.length;n++)i=r[n],this.outputQueue.push(i);return this.carryover=e[e.length-1],[2,!0]}}))}))},e}(q),at=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return r(e,t),e.prototype.decodeUTF8=function(){return new ct(this)},e}(T),ct=function(t){function e(e){var n=t.call(this)||this;return n.upstream=e,n.impl=new ht(e),n}return r(e,t),e.prototype.summary=function(){return this.impl.summary()},e.prototype.next=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){return[2,this.impl.next()]}))}))},e}(ot),ht=function(t){function n(n){var r=t.call(this)||this;if(r.upstream=n,e.env().get("IS_BROWSER"))r.decoder=new TextDecoder("utf-8");else{var i=require("string_decoder").StringDecoder;r.decoder=new i("utf8")}return r}return r(n,t),n.prototype.summary=function(){return this.upstream.summary()+" -> Utf8"},n.prototype.pump=function(){return i(this,void 0,void 0,(function(){var t,n,r;return o(this,(function(i){switch(i.label){case 0:return[4,this.upstream.next()];case 1:return(t=i.sent()).done?[2,!1]:(n=t.value,r=e.env().get("IS_BROWSER")?this.decoder.decode(n,{stream:!0}):this.decoder.write(Buffer.from(n.buffer)),this.outputQueue.push(r),[2,!0])}}))}))},n}(q),lt=function(t){function n(n,r){void 0===r&&(r={});var i=t.call(this)||this;return i.file=n,i.options=r,e.util.assert(n instanceof Uint8Array||!!e.env().get("IS_BROWSER")&&(n instanceof File||n instanceof Blob),(function(){return"FileChunkIterator only supports File, Blob and Uint8Array right now."})),i.offset=r.offset||0,i.chunkSize=r.chunkSize||1048576,i}return r(n,t),n.prototype.summary=function(){return"FileChunks "+this.file},n.prototype.next=function(){return i(this,void 0,void 0,(function(){var t,e,n=this;return o(this,(function(r){switch(r.label){case 0:return this.offset>=(this.file instanceof Uint8Array?this.file.byteLength:this.file.size)?[2,{value:null,done:!0}]:(t=new Promise((function(t,e){var r=n.offset+n.chunkSize;if(n.file instanceof Uint8Array)t(new Uint8Array(n.file.slice(n.offset,r)));else{var i=new FileReader;i.onload=function(n){var r=i.result;if(r instanceof ArrayBuffer&&(r=new Uint8Array(r)),!(r instanceof Uint8Array))return e(new TypeError("FileReader returned unknown type."));t(r)},i.onabort=function(t){return e(new Error("Aborted"))},i.onerror=function(t){return e(new Error(t.type))};var o=n.file.slice(n.offset,r);i.readAsArrayBuffer(o)}n.offset=r})),e={},[4,t]);case 1:return[2,(e.value=r.sent(),e.done=!1,e)]}}))}))},n}(at);function ft(t,n){return void 0===n&&(n={}),i(this,void 0,void 0,(function(){var r,i,s,u,a;return o(this,(function(o){switch(o.label){case 0:return"string"==typeof t?r=t:(r=t.url,i=dt(t)),[4,e.util.fetch(r,i)];case 1:return(s=o.sent()).ok?(a=Uint8Array.bind,[4,s.arrayBuffer()]):[3,3];case 2:return u=new(a.apply(Uint8Array,[void 0,o.sent()])),[2,new lt(u,n)];case 3:throw new Error(s.statusText)}}))}))}var dt=function(t){return{method:t.method,headers:t.headers,body:t.body,mode:t.mode,credentials:t.credentials,cache:t.cache,redirect:t.redirect,referrer:t.referrer,integrity:t.integrity}};function pt(t){return"string"==typeof t&&"file://"===t.substr(0,7)}var vt=function(t){function n(e,n){void 0===n&&(n={});var r=t.call(this)||this;return r.input=e,r.options=n,r}return r(n,t),n.prototype.iterator=function(){return i(this,void 0,void 0,(function(){var t;return o(this,(function(n){return pt(this.input)&&e.env().get("IS_NODE")&&(t=require("fs"),this.input=t.readFileSync(this.input.substr(7))),[2,new lt(this.input,this.options)]}))}))},n}(it),mt=function(t){function e(e,n){void 0===n&&(n={});var r=t.call(this)||this;return r.url=e,r.fileOptions=n,r}return r(e,t),e.prototype.iterator=function(){return i(this,void 0,void 0,(function(){return o(this,(function(t){return pt(this.url)?[2,new vt(this.url,this.fileOptions).iterator()]:[2,ft(this.url,this.fileOptions)]}))}))},e}(it);t.CSVDataset=et,t.Dataset=U,t.FileDataSource=vt,t.TextLineDataset=G,t.URLDataSource=mt,t.array=function(t){var e=this;return Q((function(){return i(e,void 0,void 0,(function(){return o(this,(function(e){return[2,S(t)]}))}))}),t.length)},t.csv=function(t,e){return void 0===e&&(e={}),new et(new mt(t),e)},t.func=function(t){var e=this,n=A(t);return Q((function(){return i(e,void 0,void 0,(function(){return o(this,(function(t){return[2,n]}))}))}))},t.generator=function(t){var e=this;return Q((function(){return i(e,void 0,void 0,(function(){var e;return o(this,(function(n){switch(n.label){case 0:return[4,t()];case 1:return e=n.sent(),[2,A((function(){return e.next()}))]}}))}))}))},t.microphone=function(t){return i(this,void 0,void 0,(function(){return o(this,(function(e){return[2,nt.create(t)]}))}))},t.version_data="3.6.0",t.webcam=function(t,e){return i(this,void 0,void 0,(function(){return o(this,(function(n){return[2,rt.create(t,e)]}))}))},t.zip=function(t){var e,n=this;if(!g(t))throw new Error("The argument to zip() must be an object or array.");if(Array.isArray(t))for(var r=0;r<t.length;r++)e=null==e?t[r].size:Math.min(e,t[r].size);else if(t instanceof Object)for(var s in t)e=null==e?t[s].size:Math.min(e,t[s].size);return Q((function(){return i(n,void 0,void 0,(function(){var e;return o(this,(function(n){switch(n.label){case 0:return[4,b(t,(function(t){if(t instanceof U)return{value:t.iterator(),recurse:!1};if(g(t))return{value:null,recurse:!0};throw new Error("Leaves of the structure passed to zip() must be Datasets, not primitives.")}))];case 1:return e=n.sent(),[2,(r=e,i=R.SHORTEST,void 0===i&&(i=R.FAIL),new P(r,i))]}var r,i}))}))}),e)},Object.defineProperty(t,"__esModule",{value:!0})}));
 //# sourceMappingURL=tf-data.min.js.map

dist/version.d.ts

 /** @license See the LICENSE file. */
-declare const version = "3.5.0";
+declare const version = "3.6.0";
 export { version };

dist/version.js

 /** @license See the LICENSE file. */
 // This code is auto-generated, do not modify this file!
-const version = '3.5.0';
+const version = '3.6.0';
 export { version };
 //# sourceMappingURL=version.js.map

package.json

 {
   "name": "@tensorflow/tfjs-data",
-  "version": "3.5.0",
+  "version": "3.6.0",
   "description": "TensorFlow Data API in JavaScript",
@@ -18,5 +18,5 @@ "private": false,
     "@rollup/plugin-typescript": "^3.0.0",
-    "@tensorflow/tfjs-backend-cpu": "3.5.0",
-    "@tensorflow/tfjs-core": "3.5.0",
-    "@tensorflow/tfjs-layers": "3.5.0",
+    "@tensorflow/tfjs-backend-cpu": "3.6.0",
+    "@tensorflow/tfjs-core": "3.6.0",
+    "@tensorflow/tfjs-layers": "3.6.0",
     "@types/jasmine": "~2.5.53",
@@ -35,2 +35,3 @@ "@types/seedrandom": "^2.4.27",
     "karma-typescript-es6-transform": "^5.0.2",
+    "nyc": "^15.1.0",
     "rimraf": "~2.6.2",
@@ -69,6 +70,7 @@ "rollup": "~2.3.2",
     "test-snippets-ci": "ts-node --skip-ignore --project tsconfig.test.json ./scripts/test_snippets.ts",
+    "coverage": "yarn nyc yarn ts-node --transpile-only -P tsconfig.test.json src/test_node.ts",
     "lint": "tslint -p . -t verbose"
   },
   "peerDependencies": {
-    "@tensorflow/tfjs-core": "3.5.0",
+    "@tensorflow/tfjs-core": "3.6.0",
     "seedrandom": "~2.4.3"
@@ -75,0 +77,0 @@ },

src/version.ts

 /** @license See the LICENSE file. */
 
 // This code is auto-generated, do not modify this file!
-const version = '3.5.0';
+const version = '3.6.0';
 export {version};

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Improved metrics

Total package byte prevSize

4729781

increased by0.03%

Number of package files

141

increased by0.71%

Worsened metrics

Dev dependency count

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increased by3.57%

No dependency changes