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meyda

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meyda - npm Package Compare versions

Comparing version 3.0.2 to 3.0.3

2

bower.json
{
"name": "meyda",
"main": "dist/web/meyda.min.js",
"version": "3.0.2",
"version": "3.0.3",
"homepage": "https://github.com/hughrawlinson/meyda",

@@ -6,0 +6,0 @@ "authors": [

4

dist/node/extractors/energy.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function () {

@@ -11,0 +11,0 @@ if (_typeof(arguments[0].signal) !== "object") {

4

dist/node/extractors/loudness.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function (args) {

@@ -11,0 +11,0 @@ if (_typeof(args.ampSpectrum) !== "object" || _typeof(args.barkScale) !== "object") {

4

dist/node/extractors/mfcc.js
'use strict';
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function (args) {

@@ -11,0 +11,0 @@ if (_typeof(args.ampSpectrum) !== "object" || _typeof(args.melFilterBank) !== "object") {

4

dist/node/extractors/perceptualSharpness.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function () {

@@ -11,0 +11,0 @@ if (_typeof(arguments[0].signal) !== "object") {

4

dist/node/extractors/perceptualSpread.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function () {

@@ -11,0 +11,0 @@ if (_typeof(arguments[0].signal) !== "object") {

4

dist/node/extractors/powerSpectrum.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function () {

@@ -11,0 +11,0 @@ if (_typeof(arguments[0].ampSpectrum) !== "object") {

4

dist/node/extractors/rms.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function (args) {

@@ -11,0 +11,0 @@ if (_typeof(args.signal) !== "object") {

4

dist/node/extractors/spectralCentroid.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function () {

@@ -11,0 +11,0 @@ if (_typeof(arguments[0].ampSpectrum) !== "object") {

4

dist/node/extractors/spectralFlatness.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function () {

@@ -11,0 +11,0 @@ if (_typeof(arguments[0].ampSpectrum) !== "object") {

4

dist/node/extractors/spectralKurtosis.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function () {

@@ -11,0 +11,0 @@ if (_typeof(arguments[0].ampSpectrum) !== "object") {

4

dist/node/extractors/spectralRolloff.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function () {

@@ -11,0 +11,0 @@ if (_typeof(arguments[0].ampSpectrum) !== "object") {

4

dist/node/extractors/spectralSkewness.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function (args) {

@@ -11,0 +11,0 @@ if (_typeof(args.ampSpectrum) !== "object") {

4

dist/node/extractors/spectralSlope.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function (args) {

@@ -11,0 +11,0 @@ if (_typeof(args.ampSpectrum) !== "object") {

4

dist/node/extractors/spectralSpread.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function (args) {

@@ -11,0 +11,0 @@ if (_typeof(args.ampSpectrum) !== "object") {

4

dist/node/extractors/zcr.js
"use strict";
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
exports.default = function () {

@@ -11,0 +11,0 @@ if (_typeof(arguments[0].signal) !== "object") {

9

dist/node/main.js
'use strict';
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
Object.defineProperty(exports, "__esModule", {

@@ -9,2 +7,4 @@ value: true

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
var _utilities = require('./utilities');

@@ -28,4 +28,2 @@

var MeydaAnalyzer = _interopRequireWildcard(_meydaWa);
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

@@ -54,3 +52,3 @@

createMeydaAnalyzer: function createMeydaAnalyzer(options) {
return new MeydaAnalyzer(options, this);
return new _meydaWa.MeydaAnalyzer(options, this);
},

@@ -125,3 +123,4 @@

if (typeof window !== "undefined") window.Meyda = Meyda;
module.exports = exports['default'];

69

dist/node/meyda-wa.js
'use strict';
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.MeydaAnalyzer = undefined;
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _utilities = require('./utilities');

@@ -21,40 +22,43 @@

var MeydaAnalyzer = function () {
var MeydaAnalyzer = exports.MeydaAnalyzer = function () {
function MeydaAnalyzer(options, self) {
_classCallCheck(this, MeydaAnalyzer);
if (!options.audioContext) throw self._errors.noAC;else if (options.bufferSize && !utilities.isPowerOfTwo(options.bufferSize)) throw self._errors.notPow2;else if (!options.source) throw self._errors.noSource;
this._m = self;
if (!options.audioContext) throw this._m._errors.noAC;else if (options.bufferSize && !utilities.isPowerOfTwo(options.bufferSize)) throw this._m._errors.notPow2;else if (!options.source) throw this._m._errors.noSource;
self.audioContext = options.audioContext;
this._m.audioContext = options.audioContext;
// TODO: validate options
self.setSource(options.source);
self.bufferSize = options.bufferSize || self.bufferSize || 256;
self.sampleRate = options.sampleRate || self.audioContext.sampleRate || 44100;
self.callback = options.callback;
self.windowingFunction = options.windowingFunction || "hanning";
self.featureExtractors = featureExtractors;
self.EXTRACTION_STARTED = options.startImmediately || false;
this._m.bufferSize = options.bufferSize || self.bufferSize || 256;
this._m.sampleRate = options.sampleRate || this._m.audioContext.sampleRate || 44100;
this._m.callback = options.callback;
this._m.windowingFunction = options.windowingFunction || "hanning";
this._m.featureExtractors = featureExtractors;
this._m.EXTRACTION_STARTED = options.startImmediately || false;
//create nodes
self.spn = self.audioContext.createScriptProcessor(self.bufferSize, 1, 1);
self.spn.connect(self.audioContext.destination);
this._m.spn = this._m.audioContext.createScriptProcessor(this._m.bufferSize, 1, 1);
this._m.spn.connect(this._m.audioContext.destination);
self._featuresToExtract = options.featureExtractors || [];
this._m._featuresToExtract = options.featureExtractors || [];
//always recalculate BS and MFB when a new Meyda analyzer is created.
self.barkScale = utilities.createBarkScale(self.bufferSize, self.sampleRate, self.bufferSize);
self.melFilterBank = utilities.createMelFilterBank(self.melBands, self.sampleRate, self.bufferSize);
this._m.barkScale = utilities.createBarkScale(this._m.bufferSize, this._m.sampleRate, this._m.bufferSize);
this._m.melFilterBank = utilities.createMelFilterBank(this._m.melBands, this._m.sampleRate, this._m.bufferSize);
self.inputData = null;
this._m.inputData = null;
self.spn.onaudioprocess = function (e) {
// self is to obtain the current frame pcm data
self.inputData = e.inputBuffer.getChannelData(0);
self = this;
var features = self.extract(self._featuresToExtract, self.inputData);
this.setSource(options.source);
this._m.spn.onaudioprocess = function (e) {
self._m.inputData = e.inputBuffer.getChannelData(0);
var features = self._m.extract(self._m._featuresToExtract, self._m.inputData);
// call callback if applicable
if (typeof self.callback === "function" && self.EXTRACTION_STARTED) {
self.callback(features);
if (typeof self._m.callback === "function" && self._m.EXTRACTION_STARTED) {
self._m.callback(features);
}

@@ -67,4 +71,4 @@ };

value: function start(features) {
self._featuresToExtract = features;
self.EXTRACTION_STARTED = true;
this._m._featuresToExtract = features;
this._m.EXTRACTION_STARTED = true;
}

@@ -74,3 +78,3 @@ }, {

value: function stop() {
self.EXTRACTION_STARTED = false;
this._m.EXTRACTION_STARTED = false;
}

@@ -80,3 +84,3 @@ }, {

value: function setSource(source) {
source.connect(this.spn);
source.connect(this._m.spn);
}

@@ -86,4 +90,4 @@ }, {

value: function get(features) {
if (self.inputData !== null) {
return self.extract(features || self._featuresToExtract, self.inputData);
if (this._m.inputData !== null) {
return this._m.extract(features || this._m._featuresToExtract, this._m.inputData);
} else {

@@ -96,5 +100,2 @@ return null;

return MeydaAnalyzer;
}();
exports.default = MeydaAnalyzer;
module.exports = exports['default'];
}();

4

dist/web/meyda.min.js

@@ -1,2 +0,2 @@

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t};r["default"]=function(){if("object"!==n(arguments[0].ampSpectrum))throw new TypeError;for(var t=arguments[0].ampSpectrum,e=arguments[0].sampleRate/(2*(t.length-1)),r=0,o=0;o<t.length;o++)r+=t[o];for(var a=.99*r,i=t.length-1;r>a&&i>=0;)r-=t[i],--i;return(i+1)*e},e.exports=r["default"]},{}],22:[function(t,e,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol?"symbol":typeof t};r["default"]=function(t){if("object"!==n(t.ampSpectrum))throw new TypeError;var e=(0,o.mu)(1,t.ampSpectrum),r=(0,o.mu)(2,t.ampSpectrum),a=(0,o.mu)(3,t.ampSpectrum),i=2*Math.pow(e,3)-3*e*r+a,u=Math.pow(Math.sqrt(r-Math.pow(e,2)),3);return i/u};var o=t("./extractorUtilities");e.exports=r["default"]},{"./extractorUtilities":11}],23:[function(t,e,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol?"symbol":typeof t};r["default"]=function(t){if("object"!==n(t.ampSpectrum))throw new TypeError;for(var e=0,r=0,o=new Float32Array(t.ampSpectrum.length),a=0,i=0,u=0;u<t.ampSpectrum.length;u++){e+=t.ampSpectrum[u];var s=u*t.sampleRate/t.bufferSize;o[u]=s,a+=s*s,r+=s,i+=s*t.ampSpectrum[u]}return(t.ampSpectrum.length*i-r*e)/(e*(a-Math.pow(r,2)))},e.exports=r["default"]},{}],24:[function(t,e,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol?"symbol":typeof t};r["default"]=function(t){if("object"!==n(t.ampSpectrum))throw new TypeError;return Math.sqrt((0,o.mu)(2,t.ampSpectrum)-Math.pow((0,o.mu)(1,t.ampSpectrum),2))};var o=t("./extractorUtilities");e.exports=r["default"]},{"./extractorUtilities":11}],25:[function(t,e,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol?"symbol":typeof t};r["default"]=function(){if("object"!==n(arguments[0].signal))throw new TypeError;for(var t=0,e=0;e<arguments[0].signal.length;e++)(arguments[0].signal[e]>=0&&arguments[0].signal[e+1]<0||arguments[0].signal[e]<0&&arguments[0].signal[e+1]>=0)&&t++;return t},e.exports=r["default"]},{}],26:[function(t,e,r){"use strict";function n(t){return t&&t.__esModule?t:{"default":t}}Object.defineProperty(r,"__esModule",{value:!0});var o=t("./extractors/rms"),a=n(o),i=t("./extractors/energy"),u=n(i),s=t("./extractors/spectralSlope"),c=n(s),f=t("./extractors/spectralCentroid"),l=n(f),p=t("./extractors/spectralRolloff"),m=n(p),y=t("./extractors/spectralFlatness"),h=n(y),d=t("./extractors/spectralSpread"),g=n(d),b=t("./extractors/spectralSkewness"),S=n(b),v=t("./extractors/spectralKurtosis"),w=n(v),x=t("./extractors/zcr"),_=n(x),M=t("./extractors/loudness"),E=n(M),j=t("./extractors/perceptualSpread"),O=n(j),T=t("./extractors/perceptualSharpness"),A=n(T),F=t("./extractors/mfcc"),k=n(F),z=t("./extractors/powerSpectrum"),P=n(z);r["default"]={buffer:function(t){return t.signal},rms:a["default"],energy:u["default"],complexSpectrum:function(t){return t.complexSpectrum},spectralSlope:c["default"],spectralCentroid:l["default"],spectralRolloff:m["default"],spectralFlatness:h["default"],spectralSpread:g["default"],spectralSkewness:S["default"],spectralKurtosis:w["default"],amplitudeSpectrum:function(t){return t.ampSpectrum},zcr:_["default"],loudness:E["default"],perceptualSpread:O["default"],perceptualSharpness:A["default"],powerSpectrum:P["default"],mfcc:k["default"]},e.exports=r["default"]},{"./extractors/energy":10,"./extractors/loudness":12,"./extractors/mfcc":13,"./extractors/perceptualSharpness":14,"./extractors/perceptualSpread":15,"./extractors/powerSpectrum":16,"./extractors/rms":17,"./extractors/spectralCentroid":18,"./extractors/spectralFlatness":19,"./extractors/spectralKurtosis":20,"./extractors/spectralRolloff":21,"./extractors/spectralSkewness":22,"./extractors/spectralSlope":23,"./extractors/spectralSpread":24,"./extractors/zcr":25}],27:[function(t,e,r){"use strict";function n(t){if(t&&t.__esModule)return t;var e={};if(null!=t)for(var r in t)Object.prototype.hasOwnProperty.call(t,r)&&(e[r]=t[r]);return e["default"]=t,e}Object.defineProperty(r,"__esModule",{value:!0});var o="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol?"symbol":typeof t},a=t("./utilities"),i=n(a),u=t("./featureExtractors"),s=n(u),c=t("jsfft"),f=(n(c),t("jsfft/lib/complex_array")),l=n(f),p=t("./meyda-wa"),m={audioContext:null,spn:null,bufferSize:512,sampleRate:44100,melBands:26,callback:null,windowingFunction:"hanning",featureExtractors:s,EXTRACTION_STARTED:!1,_featuresToExtract:[],_errors:{notPow2:new Error("Meyda: Input data length/buffer size needs to 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 p.MeydaAnalyzer(t,this)},extract:function(t,e){if(!e)throw this._errors.invalidInput;if("object"!=("undefined"==typeof e?"undefined":o(e)))throw this._errors.invalidInput;if(!t)throw this._errors.featureUndef;if(!i.isPowerOfTwo(e.length))throw this._errors.notPow2;("undefined"==typeof this.barkScale||this.barkScale.length!=this.bufferSize)&&(this.barkScale=i.createBarkScale(this.bufferSize,this.sampleRate,this.bufferSize)),("undefined"==typeof this.melFilterBank||this.barkScale.length!=this.bufferSize||this.melFilterBank.length!=this.melBands)&&(this.melFilterBank=i.createMelFilterBank(this.melBands,this.sampleRate,this.bufferSize)),"undefined"==typeof e.buffer?this.signal=i.arrayToTyped(e):this.signal=e;var r=i.applyWindow(this.signal,this.windowingFunction),n=new l.ComplexArray(this.bufferSize);n.map(function(t,e,n){t.real=r[e]});var a=n.FFT();this.complexSpectrum=a,this.ampSpectrum=new Float32Array(this.bufferSize/2);for(var u=0;u<this.bufferSize/2;u++)this.ampSpectrum[u]=Math.sqrt(Math.pow(a.real[u],2)+Math.pow(a.imag[u],2));if("object"===("undefined"==typeof t?"undefined":o(t))){for(var s={},c=0;c<t.length;c++)s[t[c]]=this.featureExtractors[t[c]]({ampSpectrum:this.ampSpectrum,complexSpectrum:this.complexSpectrum,signal:this.signal,bufferSize:this.bufferSize,sampleRate:this.sampleRate,barkScale:this.barkScale,melFilterBank:this.melFilterBank});return s}if("string"==typeof t)return this.featureExtractors[t]({ampSpectrum:this.ampSpectrum,complexSpectrum:this.complexSpectrum,signal:this.signal,bufferSize:this.bufferSize,sampleRate:this.sampleRate,barkScale:this.barkScale,melFilterBank:this.melFilterBank});throw this._errors.invalidFeatureFmt}};r["default"]=m,"undefined"!=typeof window&&(window.Meyda=m),e.exports=r["default"]},{"./featureExtractors":26,"./meyda-wa":28,"./utilities":29,jsfft:6,"jsfft/lib/complex_array":5}],28:[function(t,e,r){"use strict";function n(t){if(t&&t.__esModule)return t;var e={};if(null!=t)for(var r in t)Object.prototype.hasOwnProperty.call(t,r)&&(e[r]=t[r]);return e["default"]=t,e}function o(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(r,"__esModule",{value:!0}),r.MeydaAnalyzer=void 0;var a=function(){function t(t,e){for(var r=0;r<e.length;r++){var n=e[r];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(t,n.key,n)}}return function(e,r,n){return r&&t(e.prototype,r),n&&t(e,n),e}}(),i=t("./utilities"),u=n(i),s=t("./featureExtractors"),c=n(s);r.MeydaAnalyzer=function(){function t(e,r){if(o(this,t),this._m=r,!e.audioContext)throw this._m._errors.noAC;if(e.bufferSize&&!u.isPowerOfTwo(e.bufferSize))throw this._m._errors.notPow2;if(!e.source)throw this._m._errors.noSource;this._m.audioContext=e.audioContext,this._m.bufferSize=e.bufferSize||r.bufferSize||256,this._m.sampleRate=e.sampleRate||this._m.audioContext.sampleRate||44100,this._m.callback=e.callback,this._m.windowingFunction=e.windowingFunction||"hanning",this._m.featureExtractors=c,this._m.EXTRACTION_STARTED=e.startImmediately||!1,this._m.spn=this._m.audioContext.createScriptProcessor(this._m.bufferSize,1,1),this._m.spn.connect(this._m.audioContext.destination),this._m._featuresToExtract=e.featureExtractors||[],this._m.barkScale=u.createBarkScale(this._m.bufferSize,this._m.sampleRate,this._m.bufferSize),this._m.melFilterBank=u.createMelFilterBank(this._m.melBands,this._m.sampleRate,this._m.bufferSize),this._m.inputData=null,r=this,this.setSource(e.source),this._m.spn.onaudioprocess=function(t){r._m.inputData=t.inputBuffer.getChannelData(0);var e=r._m.extract(r._m._featuresToExtract,r._m.inputData);"function"==typeof r._m.callback&&r._m.EXTRACTION_STARTED&&r._m.callback(e)}}return a(t,[{key:"start",value:function(t){this._m._featuresToExtract=t,this._m.EXTRACTION_STARTED=!0}},{key:"stop",value:function(){this._m.EXTRACTION_STARTED=!1}},{key:"setSource",value:function(t){t.connect(this._m.spn)}},{key:"get",value:function(t){return null!==this._m.inputData?this._m.extract(t||this._m._featuresToExtract,this._m.inputData):null}}]),t}()},{"./featureExtractors":26,"./utilities":29}],29:[function(t,e,r){"use strict";function n(t){if(t&&t.__esModule)return t;var e={};if(null!=t)for(var r in t)Object.prototype.hasOwnProperty.call(t,r)&&(e[r]=t[r]);return e["default"]=t,e}function o(t){for(;t%2===0&&t>1;)t/=2;return 1===t}function a(t){throw new Error("Meyda: "+t)}function i(t,e){for(var r=[],n=0;n<Math.min(t.length,e.length);n++)r[n]=t[n]*e[n];return r}function u(t,e){if("rect"!==e&&(""!==e&&e||(e="hanning"),x[e]||(x[e]={}),!x[e][t.length]))try{x[e][t.length]=w[e](t.length),t=i(t,x[e][t.length])}catch(r){throw new Error("Invalid windowing function")}return t}function s(t,e,r){for(var n=new Float32Array(t),o=0;o<n.length;o++)n[o]=o*e/r,n[o]=13*Math.atan(n[o]/1315.8)+3.5*Math.atan(Math.pow(n[o]/7518,2));
return n}function c(t){return Array.prototype.slice.call(t)}function f(t){return Float32Array.from(t)}function l(t,e){return t/e}function p(t,e){return t.map(function(t){return t/e})}function m(t){var e=0;return t.forEach(function(t,r,n){t>e&&(e=t)}),t.map(function(t){return t/e})}function y(t){return t.reduce(function(t,e){return t+e})/t.length}function h(t){var e=700*(Math.exp(t/1125)-1);return e}function d(t){var e=1125*Math.log(1+t/700);return e}function g(t){return h(t)}function b(t){return d(t)}function S(t,e,r){for(var n=new Float32Array(t+2),o=new Float32Array(t+2),a=0,i=e/2,u=d(a),s=d(i),c=s-u,f=c/(t+1),l=Array(t+2),p=0;p<n.length;p++)n[p]=p*f,o[p]=h(n[p]),l[p]=Math.floor((r+1)*o[p]/e);for(var m=Array(t),y=0;y<m.length;y++){m[y]=Array.apply(null,new Array(r/2+1)).map(Number.prototype.valueOf,0);for(var p=l[y];p<l[y+1];p++)m[y][p]=(p-l[y])/(l[y+1]-l[y]);for(var p=l[y+1];p<l[y+2];p++)m[y][p]=(l[y+2]-p)/(l[y+2]-l[y+1])}return m}Object.defineProperty(r,"__esModule",{value:!0}),r.isPowerOfTwo=o,r.error=a,r.pointwiseBufferMult=i,r.applyWindow=u,r.createBarkScale=s,r.typedToArray=c,r.arrayToTyped=f,r.normalize=l,r.normalize_a=p,r.normalize_a_to_1=m,r.mean=y,r.melToFreq=g,r.freqToMel=b,r.createMelFilterBank=S;var v=t("./windowing"),w=n(v),x={}},{"./windowing":30}],30:[function(t,e,r){"use strict";function n(t){for(var e=new Float32Array(t),r=2*Math.PI/(t-1),n=2*r,o=0;t/2>o;o++)e[o]=.42-.5*Math.cos(o*r)+.08*Math.cos(o*n);for(var o=t/2;o>0;o--)e[t-o]=e[o-1];return e}function o(t){for(var e=Math.PI/(t-1),r=new Float32Array(t),n=0;t>n;n++)r[n]=Math.sin(e*n);return r}function a(t){for(var e=new Float32Array(t),r=0;t>r;r++)e[r]=.5-.5*Math.cos(2*Math.PI*r/(t-1));return e}function i(t){for(var e=new Float32Array(t),r=0;t>r;r++)e[r]=.54-.46*Math.cos(2*Math.PI*(r/t-1));return e}Object.defineProperty(r,"__esModule",{value:!0}),r.blackman=n,r.sine=o,r.hanning=a,r.hamming=i},{}]},{},[27]);

4

package.json
{
"name": "meyda",
"version": "3.0.2",
"version": "3.0.3",
"description": "Real-time feature extraction for the web audio api",

@@ -51,3 +51,3 @@ "main": "./dist/node/main.js",

"chai": "^3.1.0",
"codeclimate-test-reporter": "^0.2.1",
"codeclimate-test-reporter": "^0.3.1",
"gulp": "^3.9.0",

@@ -54,0 +54,0 @@ "gulp-babel": "^6.1.0",

2

src/main.js

@@ -5,3 +5,3 @@ import * as utilities from './utilities';

import * as complex_array from 'jsfft/lib/complex_array';
import * as MeydaAnalyzer from './meyda-wa';
import {MeydaAnalyzer} from './meyda-wa';

@@ -8,0 +8,0 @@

65

src/meyda-wa.js
import * as utilities from './utilities';
import * as featureExtractors from './featureExtractors';
class MeydaAnalyzer{
export class MeydaAnalyzer{
constructor(options, self){
this._m = self;
if (!options.audioContext)
throw self._errors.noAC;
throw this._m._errors.noAC;
else if (options.bufferSize && !utilities.isPowerOfTwo(options.bufferSize))
throw self._errors.notPow2;
throw this._m._errors.notPow2;
else if (!options.source)
throw self._errors.noSource;
throw this._m._errors.noSource;
self.audioContext = options.audioContext;
this._m.audioContext = options.audioContext;
// TODO: validate options
self.setSource(options.source);
self.bufferSize = options.bufferSize || self.bufferSize || 256;
self.sampleRate = options.sampleRate || self.audioContext.sampleRate || 44100;
self.callback = options.callback;
self.windowingFunction = options.windowingFunction || "hanning";
self.featureExtractors = featureExtractors;
self.EXTRACTION_STARTED = options.startImmediately || false;
this._m.bufferSize = options.bufferSize || self.bufferSize || 256;
this._m.sampleRate = options.sampleRate || this._m.audioContext.sampleRate || 44100;
this._m.callback = options.callback;
this._m.windowingFunction = options.windowingFunction || "hanning";
this._m.featureExtractors = featureExtractors;
this._m.EXTRACTION_STARTED = options.startImmediately || false;
//create nodes
self.spn = self.audioContext.createScriptProcessor(self.bufferSize,1,1);
self.spn.connect(self.audioContext.destination);
this._m.spn = this._m.audioContext.createScriptProcessor(this._m.bufferSize,1,1);
this._m.spn.connect(this._m.audioContext.destination);
self._featuresToExtract = options.featureExtractors || [];
this._m._featuresToExtract = options.featureExtractors || [];
//always recalculate BS and MFB when a new Meyda analyzer is created.
self.barkScale = utilities.createBarkScale(self.bufferSize, self.sampleRate, self.bufferSize);
self.melFilterBank = utilities.createMelFilterBank(self.melBands, self.sampleRate, self.bufferSize);
this._m.barkScale = utilities.createBarkScale(this._m.bufferSize, this._m.sampleRate, this._m.bufferSize);
this._m.melFilterBank = utilities.createMelFilterBank(this._m.melBands, this._m.sampleRate, this._m.bufferSize);
self.inputData = null;
this._m.inputData = null;
self.spn.onaudioprocess = function(e) {
// self is to obtain the current frame pcm data
self.inputData = e.inputBuffer.getChannelData(0);
self = this;
var features = self.extract(self._featuresToExtract, self.inputData);
this.setSource(options.source);
this._m.spn.onaudioprocess = function(e){
self._m.inputData = e.inputBuffer.getChannelData(0);
var features = self._m.extract(self._m._featuresToExtract, self._m.inputData);
// call callback if applicable
if (typeof self.callback === "function" && self.EXTRACTION_STARTED) {
self.callback(features);
if (typeof self._m.callback === "function" && self._m.EXTRACTION_STARTED) {
self._m.callback(features);
}

@@ -51,17 +54,17 @@

start(features) {
self._featuresToExtract = features;
self.EXTRACTION_STARTED = true;
this._m._featuresToExtract = features;
this._m.EXTRACTION_STARTED = true;
}
stop() {
self.EXTRACTION_STARTED = false;
this._m.EXTRACTION_STARTED = false;
}
setSource(source) {
source.connect(this.spn);
source.connect(this._m.spn);
}
get(features){
if(self.inputData !== null){
return self.extract((features || self._featuresToExtract), self.inputData);
if(this._m.inputData !== null){
return this._m.extract((features || this._m._featuresToExtract), this._m.inputData);
} else {

@@ -72,3 +75,1 @@ return null;

}
export default MeydaAnalyzer;
dist/web/meyda.js

Sorry, the diff of this file is too big to display

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