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waveWorker.js
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/***/ "./src/waveWorker.js":
/*!***************************!*\
!*** ./src/waveWorker.js ***!
\***************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
eval("\n\nfunction _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _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); } }\n\nfunction _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function\"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }\n\nfunction _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }\n\nfunction _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) { return call; } return _assertThisInitialized(self); }\n\nfunction _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return self; }\n\nfunction _wrapNativeSuper(Class) { var _cache = typeof Map === \"function\" ? new Map() : undefined; _wrapNativeSuper = function _wrapNativeSuper(Class) { if (Class === null || !_isNativeFunction(Class)) return Class; if (typeof Class !== \"function\") { throw new TypeError(\"Super expression must either be null or a function\"); } if (typeof _cache !== \"undefined\") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() { return _construct(Class, arguments, _getPrototypeOf(this).constructor); } Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writable: true, configurable: true } }); return _setPrototypeOf(Wrapper, Class); }; return _wrapNativeSuper(Class); }\n\nfunction _construct(Parent, args, Class) { if (_isNativeReflectConstruct()) { _construct = Reflect.construct; } else { _construct = function _construct(Parent, args, Class) { var a = [null]; a.push.apply(a, args); var Constructor = Function.bind.apply(Parent, a); var instance = new Constructor(); if (Class) _setPrototypeOf(instance, Class.prototype); return instance; }; } return _construct.apply(null, arguments); }\n\nfunction _isNativeReflectConstruct() { if (typeof Reflect === \"undefined\" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === \"function\") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }\n\nfunction _isNativeFunction(fn) { return Function.toString.call(fn).indexOf(\"[native code]\") !== -1; }\n\nfunction _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }\n\nfunction _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }\n\nvar WavePCM = function WavePCM(config) {\n var config = Object.assign({\n wavBitDepth: 16,\n numberOfChannels: 1\n }, config);\n\n if (!config['wavSampleRate']) {\n throw new Error(\"wavSampleRate value is required to record. NOTE: Audio is not resampled!\");\n }\n\n if ([8, 16, 24, 32].indexOf(config['wavBitDepth']) === -1) {\n throw new Error(\"Only 8, 16, 24 and 32 bits per sample are supported\");\n }\n\n this.numberOfChannels = config['numberOfChannels'];\n this.bitDepth = config['wavBitDepth'];\n this.sampleRate = config['wavSampleRate'];\n this.recordedBuffers = [];\n this.bytesPerSample = this.bitDepth / 8;\n};\n\nWavePCM.prototype.record = function (buffers) {\n var bufferLength = buffers[0].length;\n var reducedData = new Uint8Array(bufferLength * this.numberOfChannels * this.bytesPerSample); // Interleave\n\n for (var i = 0; i < bufferLength; i++) {\n for (var channel = 0; channel < this.numberOfChannels; channel++) {\n var outputIndex = (i * this.numberOfChannels + channel) * this.bytesPerSample; // clip the signal if it exceeds [-1, 1]\n\n var sample = Math.max(-1, Math.min(1, buffers[channel][i])); // bit reduce and convert to integer\n\n switch (this.bytesPerSample) {\n case 4:\n // 32 bits signed\n sample = sample * 2147483647.5 - 0.5;\n reducedData[outputIndex] = sample;\n reducedData[outputIndex + 1] = sample >> 8;\n reducedData[outputIndex + 2] = sample >> 16;\n reducedData[outputIndex + 3] = sample >> 24;\n break;\n\n case 3:\n // 24 bits signed\n sample = sample * 8388607.5 - 0.5;\n reducedData[outputIndex] = sample;\n reducedData[outputIndex + 1] = sample >> 8;\n reducedData[outputIndex + 2] = sample >> 16;\n break;\n\n case 2:\n // 16 bits signed\n sample = sample * 32767.5 - 0.5;\n reducedData[outputIndex] = sample;\n reducedData[outputIndex + 1] = sample >> 8;\n break;\n\n case 1:\n // 8 bits unsigned\n reducedData[outputIndex] = (sample + 1) * 127.5;\n break;\n\n default:\n throw new Error(\"Only 8, 16, 24 and 32 bits per sample are supported\");\n }\n }\n }\n\n this.recordedBuffers.push(reducedData);\n};\n\nWavePCM.prototype.requestData = function () {\n var bufferLength = this.recordedBuffers[0].length;\n var dataLength = this.recordedBuffers.length * bufferLength;\n var headerLength = 44;\n var wav = new Uint8Array(headerLength + dataLength);\n var view = new DataView(wav.buffer);\n view.setUint32(0, 1380533830, false); // RIFF identifier 'RIFF'\n\n view.setUint32(4, 36 + dataLength, true); // file length minus RIFF identifier length and file description length\n\n view.setUint32(8, 1463899717, false); // RIFF type 'WAVE'\n\n view.setUint32(12, 1718449184, false); // format chunk identifier 'fmt '\n\n view.setUint32(16, 16, true); // format chunk length\n\n view.setUint16(20, 1, true); // sample format (raw)\n\n view.setUint16(22, this.numberOfChannels, true); // channel count\n\n view.setUint32(24, this.sampleRate, true); // sample rate\n\n view.setUint32(28, this.sampleRate * this.bytesPerSample * this.numberOfChannels, true); // byte rate (sample rate * block align)\n\n view.setUint16(32, this.bytesPerSample * this.numberOfChannels, true); // block align (channel count * bytes per sample)\n\n view.setUint16(34, this.bitDepth, true); // bits per sample\n\n view.setUint32(36, 1684108385, false); // data chunk identifier 'data'\n\n view.setUint32(40, dataLength, true); // data chunk length\n\n for (var i = 0; i < this.recordedBuffers.length; i++) {\n wav.set(this.recordedBuffers[i], i * bufferLength + headerLength);\n }\n\n return {\n message: 'page',\n page: wav\n };\n}; // Run in AudioWorkletGlobal scope\n\n\nif (typeof registerProcessor === 'function') {\n var EncoderWorklet = /*#__PURE__*/function (_AudioWorkletProcesso) {\n _inherits(EncoderWorklet, _AudioWorkletProcesso);\n\n var _super = _createSuper(EncoderWorklet);\n\n function EncoderWorklet() {\n var _this;\n\n _classCallCheck(this, EncoderWorklet);\n\n _this = _super.call(this);\n _this.continueProcess = true;\n\n _this.port.onmessage = function (_ref) {\n var data = _ref.data;\n\n switch (data['command']) {\n case 'done':\n if (_this.recorder) {\n _this.postPage(_this.recorder.requestData());\n\n _this.port.postMessage({\n message: 'done'\n });\n\n delete _this.recorder;\n }\n\n break;\n\n case 'close':\n _this.continueProcess = false;\n break;\n\n case 'init':\n _this.recorder = new WavePCM(data);\n\n _this.port.postMessage({\n message: 'ready'\n });\n\n break;\n\n default: // Ignore any unknown commands and continue recieving commands\n\n }\n };\n\n return _this;\n }\n\n _createClass(EncoderWorklet, [{\n key: \"process\",\n value: function process(inputs) {\n if (this.recorder && inputs[0] && inputs[0].length && inputs[0][0] && inputs[0][0].length) {\n this.recorder.record(inputs[0]);\n }\n\n return this.continueProcess;\n }\n }, {\n key: \"postPage\",\n value: function postPage(pageData) {\n if (pageData) {\n this.port.postMessage(pageData, [pageData.page.buffer]);\n }\n }\n }]);\n\n return EncoderWorklet;\n }( /*#__PURE__*/_wrapNativeSuper(AudioWorkletProcessor));\n\n registerProcessor('encoder-worklet', EncoderWorklet);\n} // run in scriptProcessor worker scope\nelse {\n var recorder;\n\n var postPageGlobal = function postPageGlobal(pageData) {\n if (pageData) {\n postMessage(pageData, [pageData.page.buffer]);\n }\n };\n\n onmessage = function onmessage(_ref2) {\n var data = _ref2.data;\n\n switch (data['command']) {\n case 'encode':\n if (recorder) {\n recorder.record(data['buffers']);\n }\n\n break;\n\n case 'done':\n if (recorder) {\n postPageGlobal(recorder.requestData());\n postMessage({\n message: 'done'\n });\n recorder = null;\n }\n\n break;\n\n case 'close':\n close();\n break;\n\n case 'init':\n recorder = new WavePCM(data);\n postMessage({\n message: 'ready'\n });\n break;\n\n default: // Ignore any unknown commands and continue recieving commands\n\n }\n };\n } // Exports for unit testing.\n\n\nvar module = module || {};\nmodule.exports = WavePCM;//# sourceURL=[module]\n//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"file":"./src/waveWorker.js.js","sources":["webpack:///./src/waveWorker.js?0751"],"sourcesContent":["\"use strict\";\n\nconst WavePCM = function( config ){\n\n  var config = Object.assign({\n    wavBitDepth: 16,\n    numberOfChannels: 1,\n  }, config);\n\n  if ( !config['wavSampleRate'] ) {\n    throw new Error(\"wavSampleRate value is required to record. NOTE: Audio is not resampled!\");\n  }\n\n  if ( [8, 16, 24, 32].indexOf( config['wavBitDepth'] ) === -1 ) {\n    throw new Error(\"Only 8, 16, 24 and 32 bits per sample are supported\");\n  }\n\n  this.numberOfChannels = config['numberOfChannels'];\n  this.bitDepth = config['wavBitDepth'];\n  this.sampleRate = config['wavSampleRate'];\n  this.recordedBuffers = [];\n  this.bytesPerSample = this.bitDepth / 8;\n};\n\nWavePCM.prototype.record = function( buffers ){\n  var bufferLength = buffers[0].length;\n  var reducedData = new Uint8Array( bufferLength * this.numberOfChannels * this.bytesPerSample );\n\n  // Interleave\n  for ( var i = 0; i < bufferLength; i++ ) {\n    for ( var channel = 0; channel < this.numberOfChannels; channel++ ) {\n\n      var outputIndex = ( i * this.numberOfChannels + channel ) * this.bytesPerSample;\n\n      // clip the signal if it exceeds [-1, 1]\n      var sample = Math.max(-1, Math.min(1, buffers[ channel ][ i ]));\n\n      // bit reduce and convert to integer\n      switch ( this.bytesPerSample ) {\n        case 4: // 32 bits signed\n          sample = sample * 2147483647.5 - 0.5;\n          reducedData[ outputIndex ] = sample;\n          reducedData[ outputIndex + 1 ] = sample >> 8;\n          reducedData[ outputIndex + 2 ] = sample >> 16;\n          reducedData[ outputIndex + 3 ] = sample >> 24;\n          break;\n\n        case 3: // 24 bits signed\n          sample = sample * 8388607.5 - 0.5;\n          reducedData[ outputIndex ] = sample;\n          reducedData[ outputIndex + 1 ] = sample >> 8;\n          reducedData[ outputIndex + 2 ] = sample >> 16;\n          break;\n\n        case 2: // 16 bits signed\n          sample = sample * 32767.5 - 0.5;\n          reducedData[ outputIndex ] = sample;\n          reducedData[ outputIndex + 1 ] = sample >> 8;\n          break;\n\n        case 1: // 8 bits unsigned\n          reducedData[ outputIndex ] = (sample + 1) * 127.5;\n          break;\n\n        default:\n          throw new Error(\"Only 8, 16, 24 and 32 bits per sample are supported\");\n      }\n    }\n  }\n\n  this.recordedBuffers.push( reducedData );\n};\n\nWavePCM.prototype.requestData = function(){\n  var bufferLength = this.recordedBuffers[0].length;\n  var dataLength = this.recordedBuffers.length * bufferLength;\n  var headerLength = 44;\n  var wav = new Uint8Array( headerLength + dataLength );\n  var view = new DataView( wav.buffer );\n\n  view.setUint32( 0, 1380533830, false ); // RIFF identifier 'RIFF'\n  view.setUint32( 4, 36 + dataLength, true ); // file length minus RIFF identifier length and file description length\n  view.setUint32( 8, 1463899717, false ); // RIFF type 'WAVE'\n  view.setUint32( 12, 1718449184, false ); // format chunk identifier 'fmt '\n  view.setUint32( 16, 16, true ); // format chunk length\n  view.setUint16( 20, 1, true ); // sample format (raw)\n  view.setUint16( 22, this.numberOfChannels, true ); // channel count\n  view.setUint32( 24, this.sampleRate, true ); // sample rate\n  view.setUint32( 28, this.sampleRate * this.bytesPerSample * this.numberOfChannels, true ); // byte rate (sample rate * block align)\n  view.setUint16( 32, this.bytesPerSample * this.numberOfChannels, true ); // block align (channel count * bytes per sample)\n  view.setUint16( 34, this.bitDepth, true ); // bits per sample\n  view.setUint32( 36, 1684108385, false); // data chunk identifier 'data'\n  view.setUint32( 40, dataLength, true ); // data chunk length\n\n  for (var i = 0; i < this.recordedBuffers.length; i++ ) {\n    wav.set( this.recordedBuffers[i], i * bufferLength + headerLength );\n  }\n\n  return {message: 'page', page: wav};\n};\n\n\n// Run in AudioWorkletGlobal scope\nif (typeof registerProcessor === 'function') {\n\n  class EncoderWorklet extends AudioWorkletProcessor {\n\n    constructor(){\n      super();\n      this.continueProcess = true;\n      this.port.onmessage = ({ data }) => {\n        switch( data['command'] ){\n\n          case 'done':\n            if (this.recorder) {\n              this.postPage(this.recorder.requestData());\n              this.port.postMessage( {message: 'done'} );\n              delete this.recorder;\n            }\n            break;\n\n          case 'close':\n            this.continueProcess = false;\n            break;\n\n          case 'init':\n            this.recorder = new WavePCM( data );\n            this.port.postMessage( {message: 'ready'} );\n            break;\n\n          default:\n            // Ignore any unknown commands and continue recieving commands\n        }\n      }\n    }\n\n    process(inputs) {\n      if (this.recorder && inputs[0] && inputs[0].length && inputs[0][0] && inputs[0][0].length){\n        this.recorder.record( inputs[0] );\n      }\n      return this.continueProcess;\n    }\n\n    postPage(pageData) {\n      if (pageData) {\n        this.port.postMessage( pageData, [pageData.page.buffer] );\n      }\n    }\n  }\n\n  registerProcessor('encoder-worklet', EncoderWorklet);\n}\n\n// run in scriptProcessor worker scope\nelse {\n  var recorder;\n  var postPageGlobal = (pageData) => {\n    if (pageData) {\n      postMessage( pageData, [pageData.page.buffer] );\n    }\n  }\n\n  onmessage = ({ data }) => {\n\n    switch( data['command'] ){\n\n      case 'encode':\n        if (recorder) {\n          recorder.record( data['buffers'] );\n        }\n        break;\n\n      case 'done':\n        if (recorder) {\n          postPageGlobal(recorder.requestData());\n          postMessage( {message: 'done'} );\n          recorder = null;\n        }\n        break;\n\n      case 'close':\n        close();\n        break;\n\n      case 'init':\n        recorder = new WavePCM( data );\n        postMessage( {message: 'ready'} );\n        break;\n\n      default:\n        // Ignore any unknown commands and continue recieving commands\n    }\n  };\n}\n\n\n// Exports for unit testing.\nvar module = module || {};\nmodule.exports = WavePCM;\n"],"mappings":"AAAA;AACA;;;;;;;;;;;;;;;;;;;;;;;;;;;;;AACA;AAEA;AACA;AACA;AAFA;AACA;AAIA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AAEA;AACA;AAEA;AACA;AAEA;AACA;AAEA;AACA;AAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AAAA;AACA;AACA;AACA;AACA;AACA;AACA;AAAA;AACA;AACA;AACA;AACA;AACA;AA3BA;AA6BA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AAEA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AAAA;AACA;AACA;AACA;AACA;AACA;AACA;AAAA;AAAA;AAAA;AACA;AACA;AACA;AAEA;AAAA;AAAA;AACA;AADA;AACA;AAGA;AAAA;AACA;AADA;AACA;AAAA;AACA;AACA;AAAA;AAAA;AACA;AAAA;AAEA;AACA;AACA;AACA;AAAA;AAAA;AAAA;AACA;AAAA;AACA;AACA;AAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AAAA;AAAA;AAAA;AACA;AAAA;AACA;AACA;AACA;AApBA;AAsBA;AACA;AA3BA;AA2BA;AACA;AAhCA;AAAA;AAAA;AAkCA;AACA;AACA;AACA;AAAA;AACA;AAtCA;AAAA;AAAA;AAyCA;AACA;AACA;AACA;AA5CA;AACA;AADA;AAAA;AACA;AA8CA;AACA;AAhDA;AAoDA;AACA;AAAA;AACA;AACA;AACA;AACA;AACA;AACA;AAAA;AACA;AACA;AAEA;AACA;AACA;AACA;AACA;AAAA;AACA;AACA;AACA;AACA;AACA;AAAA;AAAA;AACA;AACA;AACA;AAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AAAA;AAAA;AACA;AACA;AACA;AACA;AA1BA;AA4BA;AACA;AACA;AACA;AAEA;AACA","sourceRoot":""}\n//# sourceURL=webpack-internal:///./src/waveWorker.js\n");
/***/ })
/******/ });
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