meyda - npm Package Compare versions

Comparing version 5.1.8 to 5.2.0

dist/node/main.js

@@ -1189,2 +1189,13 @@ 'use strict';
   /**
+   * List available audio feature extractors. Return format provides the key to
+   * be used in selecting the extractor in the extract methods
+   *
+   * @returns {Array.<string>} featureExtractors - a list of the keys of
+   * available audio feature extractors
+   */
+  listAvailableFeatureExtractors: function () {
+    return Object.keys(this.featureExtractors);
+  },
+
+  /**
    * Extract an audio feature from a buffer
@@ -1191,0 +1202,0 @@ *

dist/web/meyda.js

@@ -1193,2 +1193,13 @@ (function (global, factory) {
     /**
+     * List available audio feature extractors. Return format provides the key to
+     * be used in selecting the extractor in the extract methods
+     *
+     * @returns {Array.<string>} featureExtractors - a list of the keys of
+     * available audio feature extractors
+     */
+    listAvailableFeatureExtractors: function () {
+      return Object.keys(this.featureExtractors);
+    },
+
+    /**
      * Extract an audio feature from a buffer
@@ -1195,0 +1206,0 @@ *

dist/web/meyda.min.js

@@ -1,2 +0,2 @@
-!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).Meyda=e()}(this,(function(){"use strict";var t=Object.freeze({__proto__:null,blackman:function(t){let e=new Float32Array(t),r=2*Math.PI/(t-1),a=2*r;for(let i=0;i<t/2;i++)e[i]=.42-.5*Math.cos(i*r)+.08*Math.cos(i*a);for(let r=Math.ceil(t/2);r>0;r--)e[t-r]=e[r-1];return e},sine:function(t){let e=Math.PI/(t-1),r=new Float32Array(t);for(let a=0;a<t;a++)r[a]=Math.sin(e*a);return r},hanning:function(t){let e=new Float32Array(t);for(let r=0;r<t;r++)e[r]=.5-.5*Math.cos(2*Math.PI*r/(t-1));return e},hamming:function(t){let e=new Float32Array(t);for(let r=0;r<t;r++)e[r]=.54-.46*Math.cos(2*Math.PI*(r/t-1));return e}});let e={};function r(t){for(;t%2==0&&t>1;)t/=2;return 1===t}function a(r,a){if("rect"!==a){if(""!==a&&a||(a="hanning"),e[a]||(e[a]={}),!e[a][r.length])try{e[a][r.length]=t[a](r.length)}catch(t){throw new Error("Invalid windowing function")}r=function(t,e){let r=[];for(let a=0;a<Math.min(t.length,e.length);a++)r[a]=t[a]*e[a];return r}(r,e[a][r.length])}return r}function i(t,e,r){let a=new Float32Array(t);for(var i=0;i<a.length;i++)a[i]=i*e/r,a[i]=13*Math.atan(a[i]/1315.8)+3.5*Math.atan(Math.pow(a[i]/7518,2));return a}function n(t){return Float32Array.from(t)}function o(t){return 1125*Math.log(1+t/700)}function s(t,e,r){let a=new Float32Array(t+2),i=new Float32Array(t+2),n=e/2,s=o(0),l=(o(n)-s)/(t+1),u=Array(t+2);for(let t=0;t<a.length;t++)a[t]=t*l,i[t]=(m=a[t],700*(Math.exp(m/1125)-1)),u[t]=Math.floor((r+1)*i[t]/e);var m,h=Array(t);for(let t=0;t<h.length;t++){h[t]=Array.apply(null,new Array(r/2+1)).map(Number.prototype.valueOf,0);for(let e=u[t];e<u[t+1];e++)h[t][e]=(e-u[t])/(u[t+1]-u[t]);for(let 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Make sure you've provided a value for 'inputs' that is greater than ${t} when instantiating the MeydaAnalyzer`)}get(t){return this._m.inputData?this._m.extract(t||this._m._featuresToExtract,this._m.inputData,this._m.previousInputData):null}}var v={audioContext:null,spn:null,bufferSize:512,sampleRate:44100,melBands:26,chromaBands:12,callback:null,windowingFunction:"hanning",featureExtractors:c,EXTRACTION_STARTED:!1,numberOfMFCCCoefficients:13,_featuresToExtract:[],windowing:a,_errors:{notPow2:new Error("Meyda: Buffer size must be a power of 2, e.g. 64 or 512"),featureUndef:new Error("Meyda: No features defined."),invalidFeatureFmt:new Error("Meyda: Invalid feature format"),invalidInput:new Error("Meyda: Invalid input."),noAC:new Error("Meyda: No AudioContext specified."),noSource:new Error("Meyda: No source node specified.")},createMeydaAnalyzer:function(t){return new b(t,Object.assign({},v))},extract:function(t,e,a){if(!e)throw this._errors.invalidInput;if("object"!=typeof e)throw this._errors.invalidInput;if(!t)throw this._errors.featureUndef;if(!r(e.length))throw this._errors.notPow2;void 0!==this.barkScale&&this.barkScale.length==this.bufferSize||(this.barkScale=i(this.bufferSize,this.sampleRate,this.bufferSize)),void 0!==this.melFilterBank&&this.barkScale.length==this.bufferSize&&this.melFilterBank.length==this.melBands||(this.melFilterBank=s(Math.max(this.melBands,this.numberOfMFCCCoefficients),this.sampleRate,this.bufferSize)),void 0!==this.chromaFilterBank&&this.chromaFilterBank.length==this.chromaBands||(this.chromaFilterBank=l(this.chromaBands,this.sampleRate,this.bufferSize)),void 0===e.buffer?this.signal=n(e):this.signal=e;let o=M(e,this.windowingFunction,this.bufferSize);if(this.signal=o.windowedSignal,this.complexSpectrum=o.complexSpectrum,this.ampSpectrum=o.ampSpectrum,a){let t=M(a,this.windowingFunction,this.bufferSize);this.previousSignal=t.windowedSignal,this.previousComplexSpectrum=t.complexSpectrum,this.previousAmpSpectrum=t.ampSpectrum}const u=t=>this.featureExtractors[t]({ampSpectrum:this.ampSpectrum,chromaFilterBank:this.chromaFilterBank,complexSpectrum:this.complexSpectrum,signal:this.signal,bufferSize:this.bufferSize,sampleRate:this.sampleRate,barkScale:this.barkScale,melFilterBank:this.melFilterBank,previousSignal:this.previousSignal,previousAmpSpectrum:this.previousAmpSpectrum,previousComplexSpectrum:this.previousComplexSpectrum,numberOfMFCCCoefficients:this.numberOfMFCCCoefficients});if("object"==typeof t)return t.reduce(((t,e)=>Object.assign({},t,{[e]:u(e)})),{});if("string"==typeof t)return u(t);throw this._errors.invalidFeatureFmt}},M=function(t,e,r){var i={};void 0===t.buffer?i.signal=n(t):i.signal=t,i.windowedSignal=a(i.signal,e),i.complexSpectrum=y(i.windowedSignal),i.ampSpectrum=new Float32Array(r/2);for(var o=0;o<r/2;o++)i.ampSpectrum[o]=Math.sqrt(Math.pow(i.complexSpectrum.real[o],2)+Math.pow(i.complexSpectrum.imag[o],2));return i};return"undefined"!=typeof window&&(window.Meyda=v),v}));
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).Meyda=e()}(this,(function(){"use strict";var t=Object.freeze({__proto__:null,blackman:function(t){let e=new Float32Array(t),r=2*Math.PI/(t-1),a=2*r;for(let i=0;i<t/2;i++)e[i]=.42-.5*Math.cos(i*r)+.08*Math.cos(i*a);for(let r=Math.ceil(t/2);r>0;r--)e[t-r]=e[r-1];return e},sine:function(t){let e=Math.PI/(t-1),r=new Float32Array(t);for(let a=0;a<t;a++)r[a]=Math.sin(e*a);return r},hanning:function(t){let e=new Float32Array(t);for(let r=0;r<t;r++)e[r]=.5-.5*Math.cos(2*Math.PI*r/(t-1));return e},hamming:function(t){let e=new Float32Array(t);for(let r=0;r<t;r++)e[r]=.54-.46*Math.cos(2*Math.PI*(r/t-1));return e}});let e={};function r(t){for(;t%2==0&&t>1;)t/=2;return 1===t}function 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t.signal)throw new TypeError;for(var e=0,r=0;r<t.signal.length;r++)e+=Math.pow(t.signal[r],2);return e/=t.signal.length,e=Math.sqrt(e)},energy:function(){if("object"!=typeof arguments[0].signal)throw new TypeError;for(var t=0,e=0;e<arguments[0].signal.length;e++)t+=Math.pow(Math.abs(arguments[0].signal[e]),2);return t},complexSpectrum:function(t){return t.complexSpectrum},spectralSlope:function(t){if("object"!=typeof t.ampSpectrum)throw new TypeError;let e=0,r=0,a=new Float32Array(t.ampSpectrum.length),i=0,n=0;for(var o=0;o<t.ampSpectrum.length;o++){e+=t.ampSpectrum[o];let s=o*t.sampleRate/t.bufferSize;a[o]=s,i+=s*s,r+=s,n+=s*t.ampSpectrum[o]}return(t.ampSpectrum.length*n-r*e)/(e*(i-Math.pow(r,2)))},spectralCentroid:function(){if("object"!=typeof arguments[0].ampSpectrum)throw new TypeError;return u(1,arguments[0].ampSpectrum)},spectralRolloff:function(){if("object"!=typeof arguments[0].ampSpectrum)throw new TypeError;for(var 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t=arguments[0].ampSpectrum,e=u(1,t),r=u(2,t),a=u(3,t),i=u(4,t),n=-3*Math.pow(e,4)+6*e*r-4*e*a+i,o=Math.pow(Math.sqrt(r-Math.pow(e,2)),4);return n/o},amplitudeSpectrum:function(t){return t.ampSpectrum},zcr:function(){if("object"!=typeof arguments[0].signal)throw new TypeError;for(var t=0,e=1;e<arguments[0].signal.length;e++)(arguments[0].signal[e-1]>=0&&arguments[0].signal[e]<0||arguments[0].signal[e-1]<0&&arguments[0].signal[e]>=0)&&t++;return t},loudness:h,perceptualSpread:function(){if("object"!=typeof arguments[0].signal)throw new TypeError;for(var t=h(arguments[0]),e=0,r=0;r<t.specific.length;r++)t.specific[r]>e&&(e=t.specific[r]);var a=Math.pow((t.total-e)/t.total,2);return a},perceptualSharpness:function(){if("object"!=typeof arguments[0].signal)throw new TypeError;for(var t=h(arguments[0]),e=t.specific,r=0,a=0;a<e.length;a++)r+=a<15?(a+1)*e[a+1]:.066*Math.exp(.171*(a+1));return r*=.11/t.total},powerSpectrum:m,mfcc:function(t){if("object"!=typeof t.ampSpectrum)throw new TypeError("Valid ampSpectrum is required to generate MFCC");if("object"!=typeof t.melFilterBank)throw new TypeError("Valid melFilterBank is required to generate MFCC");let e=Math.min(40,Math.max(1,t.numberOfMFCCCoefficients||13)),r=m(t),a=t.melFilterBank.length,i=Array(a);if(a<e)throw new Error("Insufficient filter bank for requested number of coefficients");let n=new Float32Array(a);for(let e=0;e<n.length;e++){i[e]=new Float32Array(t.bufferSize/2),n[e]=0;for(let a=0;a<t.bufferSize/2;a++)i[e][a]=t.melFilterBank[e][a]*r[a],n[e]+=i[e][a];n[e]=Math.log(n[e]+1)}let o=Array.prototype.slice.call(n);return c(o).slice(0,e)},chroma:function(t){if("object"!=typeof t.ampSpectrum)throw new TypeError("Valid ampSpectrum is required to generate chroma");if("object"!=typeof t.chromaFilterBank)throw new TypeError("Valid chromaFilterBank is required to generate chroma");var e=t.chromaFilterBank.map(((e,r)=>t.ampSpectrum.reduce(((t,r,a)=>t+r*e[a]),0))),r=Math.max(...e);return r?e.map((t=>t/r)):e},spectralFlux:function(t){if("object"!=typeof t.signal||"object"!=typeof t.previousSignal)throw new TypeError;let e=0;for(let r=-t.bufferSize/2;r<signal.length/2-1;r++)x=Math.abs(t.signal[r])-Math.abs(t.previousSignal[r]),e+=(x+Math.abs(x))/2;return e}});function g(t){if(Array.isArray(t)){for(var e=0,r=Array(t.length);e<t.length;e++)r[e]=t[e];return r}return Array.from(t)}var w={},S={},_={bitReverseArray:function(t){if(void 0===w[t]){for(var e=(t-1).toString(2).length,r="0".repeat(e),a={},i=0;i<t;i++){var n=i.toString(2);n=r.substr(n.length)+n,n=[].concat(g(n)).reverse().join(""),a[i]=parseInt(n,2)}w[t]=a}return w[t]},multiply:function(t,e){return{real:t.real*e.real-t.imag*e.imag,imag:t.real*e.imag+t.imag*e.real}},add:function(t,e){return{real:t.real+e.real,imag:t.imag+e.imag}},subtract:function(t,e){return{real:t.real-e.real,imag:t.imag-e.imag}},euler:function(t,e){var r=-2*Math.PI*t/e;return{real:Math.cos(r),imag:Math.sin(r)}},conj:function(t){return t.imag*=-1,t},constructComplexArray:function(t){var e={};e.real=void 0===t.real?t.slice():t.real.slice();var r=e.real.length;return void 0===S[r]&&(S[r]=Array.apply(null,Array(r)).map(Number.prototype.valueOf,0)),e.imag=S[r].slice(),e}},d=function(t){var e={};void 0===t.real||void 0===t.imag?e=_.constructComplexArray(t):(e.real=t.real.slice(),e.imag=t.imag.slice());var r=e.real.length,a=Math.log2(r);if(Math.round(a)!=a)throw new Error("Input size must be a power of 2.");if(e.real.length!=e.imag.length)throw new Error("Real and imaginary components must have the same length.");for(var i=_.bitReverseArray(r),n={real:[],imag:[]},o=0;o<r;o++)n.real[i[o]]=e.real[o],n.imag[i[o]]=e.imag[o];for(var s=0;s<r;s++)e.real[s]=n.real[s],e.imag[s]=n.imag[s];for(var l=1;l<=a;l++)for(var u=Math.pow(2,l),h=0;h<u/2;h++)for(var m=_.euler(h,u),p=0;p<r/u;p++){var c=u*p+h,f=u*p+h+u/2,g={real:e.real[c],imag:e.imag[c]},w={real:e.real[f],imag:e.imag[f]},S=_.multiply(m,w),d=_.subtract(g,S);e.real[f]=d.real,e.imag[f]=d.imag;var y=_.add(S,g);e.real[c]=y.real,e.imag[c]=y.imag}return e},y=d;class b{constructor(t,e){if(this._m=e,!t.audioContext)throw this._m.errors.noAC;if(t.bufferSize&&!r(t.bufferSize))throw this._m._errors.notPow2;if(!t.source)throw this._m._errors.noSource;this._m.audioContext=t.audioContext,this._m.bufferSize=t.bufferSize||this._m.bufferSize||256,this._m.hopSize=t.hopSize||this._m.hopSize||this._m.bufferSize,this._m.sampleRate=t.sampleRate||this._m.audioContext.sampleRate||44100,this._m.callback=t.callback,this._m.windowingFunction=t.windowingFunction||"hanning",this._m.featureExtractors=f,this._m.EXTRACTION_STARTED=t.startImmediately||!1,this._m.channel="number"==typeof t.channel?t.channel:0,this._m.inputs=t.inputs||1,this._m.outputs=t.outputs||1,this._m.numberOfMFCCCoefficients=t.numberOfMFCCCoefficients||this._m.numberOfMFCCCoefficients||13,this._m.spn=this._m.audioContext.createScriptProcessor(this._m.bufferSize,this._m.inputs,this._m.outputs),this._m.spn.connect(this._m.audioContext.destination),this._m._featuresToExtract=t.featureExtractors||[],this._m.barkScale=i(this._m.bufferSize,this._m.sampleRate,this._m.bufferSize),this._m.melFilterBank=s(Math.max(this._m.melBands,this._m.numberOfMFCCCoefficients),this._m.sampleRate,this._m.bufferSize),this._m.inputData=null,this._m.previousInputData=null,this._m.frame=null,this._m.previousFrame=null,this.setSource(t.source),this._m.spn.onaudioprocess=t=>{if(null!==this._m.inputData&&(this._m.previousInputData=this._m.inputData),this._m.inputData=t.inputBuffer.getChannelData(this._m.channel),this._m.previousInputData)(e=new Float32Array(this._m.previousInputData.length+this._m.inputData.length-this._m.hopSize)).set(this._m.previousInputData.slice(this._m.hopSize)),e.set(this._m.inputData,this._m.previousInputData.length-this._m.hopSize);else var e=this._m.inputData;(function(t,e,r){if(t.length<e)throw new Error("Buffer is too short for frame length");if(r<1)throw new Error("Hop length cannot be less that 1");if(e<1)throw new Error("Frame length cannot be less that 1");const a=1+Math.floor((t.length-e)/r);return new Array(a).fill(0).map(((a,i)=>t.slice(i*r,i*r+e)))})(e,this._m.bufferSize,this._m.hopSize).forEach((t=>{this._m.frame=t;var e=this._m.extract(this._m._featuresToExtract,this._m.frame,this._m.previousFrame);"function"==typeof this._m.callback&&this._m.EXTRACTION_STARTED&&this._m.callback(e),this._m.previousFrame=this._m.frame}))}}start(t){this._m._featuresToExtract=t||this._m._featuresToExtract,this._m.EXTRACTION_STARTED=!0}stop(){this._m.EXTRACTION_STARTED=!1}setSource(t){this._m.source&&this._m.source.disconnect(this._m.spn),this._m.source=t,this._m.source.connect(this._m.spn)}setChannel(t){t<=this._m.inputs?this._m.channel=t:console.error(`Channel ${t} does not exist. Make sure you've provided a value for 'inputs' that is greater than ${t} when instantiating the MeydaAnalyzer`)}get(t){return this._m.inputData?this._m.extract(t||this._m._featuresToExtract,this._m.inputData,this._m.previousInputData):null}}var v={audioContext:null,spn:null,bufferSize:512,sampleRate:44100,melBands:26,chromaBands:12,callback:null,windowingFunction:"hanning",featureExtractors:f,EXTRACTION_STARTED:!1,numberOfMFCCCoefficients:13,_featuresToExtract:[],windowing:a,_errors:{notPow2:new Error("Meyda: Buffer size must be a power of 2, e.g. 64 or 512"),featureUndef:new Error("Meyda: No features defined."),invalidFeatureFmt:new Error("Meyda: Invalid feature format"),invalidInput:new Error("Meyda: Invalid input."),noAC:new Error("Meyda: No AudioContext specified."),noSource:new Error("Meyda: No source node specified.")},createMeydaAnalyzer:function(t){return new b(t,Object.assign({},v))},listAvailableFeatureExtractors:function(){return Object.keys(this.featureExtractors)},extract:function(t,e,a){if(!e)throw this._errors.invalidInput;if("object"!=typeof e)throw this._errors.invalidInput;if(!t)throw this._errors.featureUndef;if(!r(e.length))throw this._errors.notPow2;void 0!==this.barkScale&&this.barkScale.length==this.bufferSize||(this.barkScale=i(this.bufferSize,this.sampleRate,this.bufferSize)),void 0!==this.melFilterBank&&this.barkScale.length==this.bufferSize&&this.melFilterBank.length==this.melBands||(this.melFilterBank=s(Math.max(this.melBands,this.numberOfMFCCCoefficients),this.sampleRate,this.bufferSize)),void 0!==this.chromaFilterBank&&this.chromaFilterBank.length==this.chromaBands||(this.chromaFilterBank=l(this.chromaBands,this.sampleRate,this.bufferSize)),void 0===e.buffer?this.signal=n(e):this.signal=e;let o=M(e,this.windowingFunction,this.bufferSize);if(this.signal=o.windowedSignal,this.complexSpectrum=o.complexSpectrum,this.ampSpectrum=o.ampSpectrum,a){let t=M(a,this.windowingFunction,this.bufferSize);this.previousSignal=t.windowedSignal,this.previousComplexSpectrum=t.complexSpectrum,this.previousAmpSpectrum=t.ampSpectrum}const u=t=>this.featureExtractors[t]({ampSpectrum:this.ampSpectrum,chromaFilterBank:this.chromaFilterBank,complexSpectrum:this.complexSpectrum,signal:this.signal,bufferSize:this.bufferSize,sampleRate:this.sampleRate,barkScale:this.barkScale,melFilterBank:this.melFilterBank,previousSignal:this.previousSignal,previousAmpSpectrum:this.previousAmpSpectrum,previousComplexSpectrum:this.previousComplexSpectrum,numberOfMFCCCoefficients:this.numberOfMFCCCoefficients});if("object"==typeof t)return t.reduce(((t,e)=>Object.assign({},t,{[e]:u(e)})),{});if("string"==typeof t)return u(t);throw this._errors.invalidFeatureFmt}},M=function(t,e,r){var i={};void 0===t.buffer?i.signal=n(t):i.signal=t,i.windowedSignal=a(i.signal,e),i.complexSpectrum=y(i.windowedSignal),i.ampSpectrum=new Float32Array(r/2);for(var o=0;o<r/2;o++)i.ampSpectrum[o]=Math.sqrt(Math.pow(i.complexSpectrum.real[o],2)+Math.pow(i.complexSpectrum.imag[o],2));return i};return"undefined"!=typeof window&&(window.Meyda=v),v}));
 //# sourceMappingURL=meyda.min.js.map

package.json

 {
   "name": "meyda",
-  "version": "5.1.8",
+  "version": "5.2.0",
   "description": "Real-time feature extraction for the web audio api",
@@ -5,0 +5,0 @@ "main": "./dist/node/main.js",

README.md

@@ -7,2 +7,4 @@ # meyda
 
+Would you like your Meyda project to be featured in our [user showcase]? [Please let us know!](https://github.com/meyda/meyda/issues/new?assignees=&labels=Showcase+Request&template=showcase-application.md&title=)
+
 Want to ask questions, or chat about Meyda? Check out our [slack channel] on the Web Audio Slack Team. You'll need to [sign up here][web-audio-slack-team-signup] before you can join.
@@ -32,1 +34,2 @@
 [web-audio-slack-team-signup]: https://web-audio-slackin.herokuapp.com/
+[user-showcase]: https://meyda.js.org/showcase

src/main.js

@@ -174,2 +174,14 @@ import * as utilities from "./utilities";
   /**
+   * List available audio feature extractors. Return format provides the key to
+   * be used in selecting the extractor in the extract methods
+   *
+   * @returns {Array.<string>} featureExtractors - a list of the keys of
+   * available audio feature extractors
+   */
+
+  listAvailableFeatureExtractors: function () {
+    return Object.keys(this.featureExtractors);
+  },
+
+  /**
    * Extract an audio feature from a buffer
@@ -176,0 +188,0 @@ *

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Total package byte prevSize

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increased by0.7%

Lines of code

5171

increased by0.58%

Number of lines in readme file

34

increased by9.68%

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