ml5/dist/ml5.min.js

A friendly machine learning library for the web.

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/**
 * @license
 * Copyright 2019 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
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this.throwIfDisposed(),pt.neg(this)},t.prototype.ceil=function(){return this.throwIfDisposed(),pt.ceil(this)},t.prototype.floor=function(){return this.throwIfDisposed(),pt.floor(this)},t.prototype.sign=function(){return this.throwIfDisposed(),pt.sign(this)},t.prototype.isNaN=function(){return this.throwIfDisposed(),pt.isNaN(this)},t.prototype.isInf=function(){return this.throwIfDisposed(),pt.isInf(this)},t.prototype.isFinite=function(){return this.throwIfDisposed(),pt.isFinite(this)},t.prototype.exp=function(){return this.throwIfDisposed(),pt.exp(this)},t.prototype.expm1=function(){return this.throwIfDisposed(),pt.expm1(this)},t.prototype.log=function(){return this.throwIfDisposed(),pt.log(this)},t.prototype.log1p=function(){return this.throwIfDisposed(),pt.log1p(this)},t.prototype.sqrt=function(){return this.throwIfDisposed(),pt.sqrt(this)},t.prototype.rsqrt=function(){return this.throwIfDisposed(),pt.rsqrt(this)},t.prototype.square=function(){return this.throwIfDisposed(),pt.square(this)},t.prototype.reciprocal=function(){return this.throwIfDisposed(),pt.reciprocal(this)},t.prototype.abs=function(){return this.throwIfDisposed(),pt.abs(this)},t.prototype.clipByValue=function(t,e){return this.throwIfDisposed(),pt.clipByValue(this,t,e)},t.prototype.relu=function(){return this.throwIfDisposed(),pt.relu(this)},t.prototype.elu=function(){return this.throwIfDisposed(),pt.elu(this)},t.prototype.selu=function(){return this.throwIfDisposed(),pt.selu(this)},t.prototype.leakyRelu=function(t){return void 0===t&&(t=.2),this.throwIfDisposed(),pt.leakyRelu(this,t)},t.prototype.prelu=function(t){return this.throwIfDisposed(),pt.prelu(this,t)},t.prototype.sigmoid=function(){return this.throwIfDisposed(),pt.sigmoid(this)},t.prototype.logSigmoid=function(){return this.throwIfDisposed(),pt.logSigmoid(this)},t.prototype.softplus=function(){return this.throwIfDisposed(),pt.softplus(this)},t.prototype.zerosLike=function(){return 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this.throwIfDisposed(),pt.pool(this,t,e,n,r,i)},t.prototype.variable=function(t,e,n){return void 0===t&&(t=!0),this.throwIfDisposed(),vt.variable(this,t,e,n)},t.prototype.unsortedSegmentSum=function(t,e){return this.throwIfDisposed(),pt.unsortedSegmentSum(this,t,e)},t.prototype.batchToSpaceND=function(t,e){return this.throwIfDisposed(),pt.batchToSpaceND(this,t,e)},t.prototype.spaceToBatchND=function(t,e){return this.throwIfDisposed(),pt.spaceToBatchND(this,t,e)},t.prototype.topk=function(t,e){return void 0===t&&(t=1),void 0===e&&(e=!0),this.throwIfDisposed(),pt.topk(this,t,e)},t.prototype.stridedSlice=function(t,e,n,r,i,o,a,s){return void 0===r&&(r=0),void 0===i&&(i=0),void 0===o&&(o=0),void 0===a&&(a=0),void 0===s&&(s=0),this.throwIfDisposed(),pt.stridedSlice(this,t,e,n,r,i,o,a,s)},t.prototype.depthToSpace=function(t,e){return this.throwIfDisposed(),pt.depthToSpace(this,t,e)},t.prototype.fft=function(){return this.throwIfDisposed(),pt.spectral.fft(this)},t.prototype.ifft=function(){return this.throwIfDisposed(),pt.spectral.ifft(this)},t.prototype.rfft=function(){return this.throwIfDisposed(),pt.spectral.rfft(this)},t.prototype.irfft=function(){return this.throwIfDisposed(),pt.spectral.irfft(this)},t}();Object.defineProperty(gt,Symbol.hasInstance,{value:function(t){return!!t&&null!=t.dataId&&null!=t.shape&&null!=t.dtype}});var vt=function(t){function e(e,n,r){void 0===n&&(n=!0);var i=t.call(this,e.shape,e.dtype,null,e.dataId)||this;i.trainable=n,i.name=r,null==i.name&&(i.name=ht().nextVariableId().toString());try{ht().registerVariable(i)}catch(t){throw ht().disposeTensor(i),t}return i}return s(e,t),e.variable=function(t,n,r,i){return void 0===n&&(n=!0),null!=i&&i!==t.dtype&&(t=t.asType(i)),new e(t,n,r)},e.prototype.assign=function(t){if(t.dtype!==this.dtype)throw new Error("dtype of the new value ("+t.dtype+") and previous value ("+this.dtype+") must match");if(!E(t.shape,this.shape))throw new Error("shape of the new value ("+t.shape+") and previous value ("+this.shape+") must match");ht().disposeTensor(this),this.dataId=t.dataId,ht().registerTensor(this)},e.prototype.dispose=function(){ht().disposeVariable(this),this.isDisposedInternal=!0},e}(gt);Object.defineProperty(vt,Symbol.hasInstance,{value:function(t){return t instanceof gt&&null!=t.assign&&t.assign instanceof Function}});var bt,yt,wt,xt,_t,kt=vt.variable;!function(t){t.R0="R0",t.R1="R1",t.R2="R2",t.R3="R3",t.R4="R4",t.R5="R5",t.R6="R6"}(bt||(bt={})),function(t){t.float32="float32",t.int32="int32",t.bool="int32",t.complex64="complex64"}(yt||(yt={})),function(t){t.float32="float32",t.int32="int32",t.bool="bool",t.complex64="complex64"}(wt||(wt={})),function(t){t.float32="float32",t.int32="float32",t.bool="float32",t.complex64="complex64"}(xt||(xt={})),function(t){t.float32="complex64",t.int32="complex64",t.bool="complex64",t.complex64="complex64"}(_t||(_t={}));var St={float32:xt,int32:yt,bool:wt,complex64:_t};function Et(t,e){if("string"===t||"string"===e){if("string"===t&&"string"===e)return"string";throw new Error("Can not upcast "+t+" with "+e)}return St[t][e]}function Ot(t){return Et(t,"int32")}function At(t,e){if(t.dtype===e.dtype)return[t,e];var n=Et(t.dtype,e.dtype);return[t.cast(n),e.cast(n)]}function Ct(t,e){w(t.dtype===e.dtype,function(){return"The dtypes of the first("+t.dtype+") and second("+e.dtype+") input must match"})}function Mt(t){var e=[];return function t(e,n,r){if(null!=e)if(e instanceof gt)n.push(e);else if(i=e,Array.isArray(i)||"object"==typeof i){var i,o=e;for(var a in o){var s=o[a];r.has(s)||(r.add(s),t(s,n,r))}}}(t,e,new Set),e}var Nt,Tt=Object.freeze({makeTypesMatch:At,assertTypesMatch:Ct,isTensorInList:function(t,e){for(var n=0;n<e.length;n++)if(e[n].id===t.id)return!0;return!1},getTensorsInContainer:Mt}),It=function(){function t(){this.registeredVariables={},this.nextTapeNodeId=0,this.numBytes=0,this.numTensors=0,this.numStringTensors=0,this.numDataBuffers=0,this.gradientDepth=0,this.kernelDepth=0,this.scopeStack=[],this.nextScopeId=0,this.tensorInfo=new WeakMap,this.profiling=!1,this.activeProfile={newBytes:0,newTensors:0,peakBytes:0,kernels:[],result:null}}return t.prototype.dispose=function(){for(var t in this.registeredVariables)this.registeredVariables[t].dispose()},t}(),Dt=function(){function t(t){this.ENV=t,this.registry={},this.registryFactory={},this.pendingBackendInitId=0,this.state=new It}return t.prototype.ready=function(){return c(this,void 0,void 0,function(){var t,e,n;return l(this,function(r){switch(r.label){case 0:if(null!=this.pendingBackendInit)return[2,this.pendingBackendInit.then(function(){})];if(null!=this.backendInstance)return[2];t=this.getSortedBackends(),e=0,r.label=1;case 1:return e<t.length?(n=t[e],[4,this.initializeBackend(n).success]):[3,5];case 2:return r.sent()?[4,this.setBackend(n)]:[3,4];case 3:return r.sent(),[2];case 4:return e++,[3,1];case 5:throw new Error("Could not initialize any backends, all backend initializations failed.")}})})},Object.defineProperty(t.prototype,"backend",{get:function(){if(null!=this.pendingBackendInit)throw new Error("Backend '"+this.backendName+"' has not yet been initialized. Make sure to await tf.ready() before calling other methods");if(null==this.backendInstance){var t=this.initializeBackendsAndReturnBest(),e=t.name;if(t.asyncInit)throw new Error("The highest priority backend '"+e+"' has not yet been initialized. Make sure to await tf.ready() before calling other methods");this.setBackend(e)}return this.backendInstance},enumerable:!0,configurable:!0}),t.prototype.backendNames=function(){return Object.keys(this.registryFactory)},t.prototype.findBackend=function(t){if(!(t in this.registry)){if(!(t in this.registryFactory))return null;if(this.initializeBackend(t).asyncInit)return null}return this.registry[t]},t.prototype.findBackendFactory=function(t){return t in this.registryFactory?this.registryFactory[t].factory:null},t.prototype.registerBackend=function(t,e,n){return void 0===n&&(n=1),t in this.registryFactory?(console.warn(t+" backend was already registered. Reusing existing backend factory."),!1):(this.registryFactory[t]={factory:e,priority:n},!0)},t.prototype.setBackend=function(t){return c(this,void 0,void 0,function(){var e,n,r;return l(this,function(i){switch(i.label){case 0:if(null==this.registryFactory[t])throw new Error("Backend name '"+t+"' not found in registry");return this.backendName=t,null!=this.registry[t]?[3,4]:(this.backendInstance=null,e=this.initializeBackend(t),n=e.success,e.asyncInit?[4,n]:[3,2]);case 1:return r=i.sent(),[3,3];case 2:r=n,i.label=3;case 3:if(!r)return[2,!1];i.label=4;case 4:return this.backendInstance=this.registry[t],this.profiler=new it(this.backendInstance),[2,!0]}})})},t.prototype.initializeBackend=function(t){var e=this,n=jt.registryFactory[t];if(null==n)throw new Error("Cannot initialize backend "+t+", no registration found.");try{var r=n.factory();if(Promise.resolve(r)===r){var i=++this.pendingBackendInitId,o=r.then(function(n){return!(i<e.pendingBackendInitId||(e.registry[t]=n,e.pendingBackendInit=null,0))}).catch(function(n){return!(i<e.pendingBackendInitId||(e.pendingBackendInit=null,console.warn("Initialization of backend "+t+" failed"),console.warn(n.stack||n.message),1))});return this.pendingBackendInit=o,{success:o,asyncInit:!0}}return this.registry[t]=r,{success:!0,asyncInit:!1}}catch(e){return console.warn("Initialization of backend "+t+" failed"),console.warn(e.stack||e.message),{success:!1,asyncInit:!1}}},t.prototype.removeBackend=function(t){if(!(t in this.registryFactory))throw new Error(t+" backend not found in registry");this.backendName===t&&null!=this.pendingBackendInit&&this.pendingBackendInitId++,t in this.registry&&(this.registry[t].dispose(),delete this.registry[t]),delete this.registryFactory[t],this.backendName===t&&(this.pendingBackendInit=null,this.backendName=null,this.backendInstance=null)},t.prototype.getSortedBackends=function(){var t=this;if(0===Object.keys(this.registryFactory).length)throw new Error("No backend found in registry.");return Object.keys(this.registryFactory).sort(function(e,n){return t.registryFactory[n].priority-t.registry