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357 lines
13 KiB
JavaScript
357 lines
13 KiB
JavaScript
2 years ago
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(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.Recorder = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
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"use strict";
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module.exports = require("./recorder").Recorder;
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},{"./recorder":2}],2:[function(require,module,exports){
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'use strict';
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var _createClass = (function () {
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function defineProperties(target, props) {
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for (var i = 0; i < props.length; i++) {
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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);
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}
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}return function (Constructor, protoProps, staticProps) {
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if (protoProps) defineProperties(Constructor.prototype, protoProps);if (staticProps) defineProperties(Constructor, staticProps);return Constructor;
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};
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})();
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.Recorder = undefined;
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var _inlineWorker = require('inline-worker');
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var _inlineWorker2 = _interopRequireDefault(_inlineWorker);
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function _interopRequireDefault(obj) {
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return obj && obj.__esModule ? obj : { default: obj };
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}
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function _classCallCheck(instance, Constructor) {
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if (!(instance instanceof Constructor)) {
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throw new TypeError("Cannot call a class as a function");
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}
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}
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var Recorder = exports.Recorder = (function () {
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function Recorder(source, cfg) {
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var _this = this;
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_classCallCheck(this, Recorder);
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this.config = {
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bufferLen: 4096,
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numChannels: 2,
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mimeType: 'audio/wav'
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};
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this.recording = false;
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this.callbacks = {
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getBuffer: [],
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exportWAV: []
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};
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Object.assign(this.config, cfg);
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this.context = source.context;
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this.node = (this.context.createScriptProcessor || this.context.createJavaScriptNode).call(this.context, this.config.bufferLen, this.config.numChannels, this.config.numChannels);
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this.node.onaudioprocess = function (e) {
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if (!_this.recording) return;
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var buffer = [];
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for (var channel = 0; channel < _this.config.numChannels; channel++) {
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buffer.push(e.inputBuffer.getChannelData(channel));
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}
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_this.worker.postMessage({
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command: 'record',
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buffer: buffer
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});
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};
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source.connect(this.node);
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this.node.connect(this.context.destination); //this should not be necessary
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var self = {};
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this.worker = new _inlineWorker2.default(function () {
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var recLength = 0,
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recBuffers = [],
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sampleRate = undefined,
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numChannels = undefined;
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self.onmessage = function (e) {
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switch (e.data.command) {
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case 'init':
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init(e.data.config);
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break;
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case 'record':
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record(e.data.buffer);
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break;
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case 'exportWAV':
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exportWAV(e.data.type);
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break;
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case 'getBuffer':
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getBuffer();
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break;
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case 'clear':
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clear();
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break;
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}
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};
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function init(config) {
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sampleRate = config.sampleRate;
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numChannels = config.numChannels;
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initBuffers();
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}
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function record(inputBuffer) {
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for (var channel = 0; channel < numChannels; channel++) {
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recBuffers[channel].push(inputBuffer[channel]);
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}
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recLength += inputBuffer[0].length;
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}
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function exportWAV(type) {
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var buffers = [];
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for (var channel = 0; channel < numChannels; channel++) {
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buffers.push(mergeBuffers(recBuffers[channel], recLength));
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}
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var interleaved = undefined;
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if (numChannels === 2) {
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interleaved = interleave(buffers[0], buffers[1]);
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} else {
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interleaved = buffers[0];
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}
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var dataview = encodeWAV(interleaved);
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var audioBlob = new Blob([dataview], { type: type });
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self.postMessage({ command: 'exportWAV', data: audioBlob });
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}
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function getBuffer() {
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var buffers = [];
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for (var channel = 0; channel < numChannels; channel++) {
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buffers.push(mergeBuffers(recBuffers[channel], recLength));
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}
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self.postMessage({ command: 'getBuffer', data: buffers });
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}
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function clear() {
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recLength = 0;
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recBuffers = [];
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initBuffers();
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}
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function initBuffers() {
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for (var channel = 0; channel < numChannels; channel++) {
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recBuffers[channel] = [];
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}
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}
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function mergeBuffers(recBuffers, recLength) {
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var result = new Float32Array(recLength);
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var offset = 0;
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for (var i = 0; i < recBuffers.length; i++) {
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result.set(recBuffers[i], offset);
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offset += recBuffers[i].length;
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}
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return result;
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}
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function interleave(inputL, inputR) {
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var length = inputL.length + inputR.length;
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var result = new Float32Array(length);
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var index = 0,
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inputIndex = 0;
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while (index < length) {
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result[index++] = inputL[inputIndex];
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result[index++] = inputR[inputIndex];
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inputIndex++;
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}
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return result;
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}
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function floatTo16BitPCM(output, offset, input) {
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for (var i = 0; i < input.length; i++, offset += 2) {
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var s = Math.max(-1, Math.min(1, input[i]));
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output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
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}
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}
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function writeString(view, offset, string) {
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for (var i = 0; i < string.length; i++) {
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view.setUint8(offset + i, string.charCodeAt(i));
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}
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}
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function encodeWAV(samples) {
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var buffer = new ArrayBuffer(44 + samples.length * 2);
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var view = new DataView(buffer);
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/* RIFF identifier */
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writeString(view, 0, 'RIFF');
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/* RIFF chunk length */
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view.setUint32(4, 36 + samples.length * 2, true);
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/* RIFF type */
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writeString(view, 8, 'WAVE');
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/* format chunk identifier */
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writeString(view, 12, 'fmt ');
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/* format chunk length */
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view.setUint32(16, 16, true);
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/* sample format (raw) */
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view.setUint16(20, 1, true);
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/* channel count */
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view.setUint16(22, numChannels, true);
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/* sample rate */
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view.setUint32(24, sampleRate, true);
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/* byte rate (sample rate * block align) */
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view.setUint32(28, sampleRate * 4, true);
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/* block align (channel count * bytes per sample) */
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view.setUint16(32, numChannels * 2, true);
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/* bits per sample */
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view.setUint16(34, 16, true);
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/* data chunk identifier */
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writeString(view, 36, 'data');
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/* data chunk length */
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view.setUint32(40, samples.length * 2, true);
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floatTo16BitPCM(view, 44, samples);
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return view;
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}
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}, self);
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this.worker.postMessage({
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command: 'init',
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config: {
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sampleRate: this.context.sampleRate,
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numChannels: this.config.numChannels
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}
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});
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this.worker.onmessage = function (e) {
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var cb = _this.callbacks[e.data.command].pop();
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if (typeof cb == 'function') {
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cb(e.data.data);
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}
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};
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}
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_createClass(Recorder, [{
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key: 'record',
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value: function record() {
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this.recording = true;
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}
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}, {
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key: 'stop',
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value: function stop() {
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this.recording = false;
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}
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}, {
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key: 'clear',
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value: function clear() {
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this.worker.postMessage({ command: 'clear' });
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}
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}, {
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key: 'getBuffer',
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value: function getBuffer(cb) {
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cb = cb || this.config.callback;
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if (!cb) throw new Error('Callback not set');
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this.callbacks.getBuffer.push(cb);
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this.worker.postMessage({ command: 'getBuffer' });
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}
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}, {
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key: 'exportWAV',
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value: function exportWAV(cb, mimeType) {
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mimeType = mimeType || this.config.mimeType;
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cb = cb || this.config.callback;
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if (!cb) throw new Error('Callback not set');
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this.callbacks.exportWAV.push(cb);
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this.worker.postMessage({
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command: 'exportWAV',
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type: mimeType
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});
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}
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}], [{
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key: 'forceDownload',
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value: function forceDownload(blob, filename) {
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var url = (window.URL || window.webkitURL).createObjectURL(blob);
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var link = window.document.createElement('a');
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link.href = url;
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link.download = filename || 'output.wav';
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var click = document.createEvent("Event");
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click.initEvent("click", true, true);
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link.dispatchEvent(click);
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}
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}]);
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return Recorder;
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})();
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exports.default = Recorder;
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},{"inline-worker":3}],3:[function(require,module,exports){
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"use strict";
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module.exports = require("./inline-worker");
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},{"./inline-worker":4}],4:[function(require,module,exports){
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(function (global){
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"use strict";
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var _createClass = (function () { function defineProperties(target, props) { for (var key in props) { var prop = props[key]; prop.configurable = true; if (prop.value) prop.writable = true; } Object.defineProperties(target, props); } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
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var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
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var WORKER_ENABLED = !!(global === global.window && global.URL && global.Blob && global.Worker);
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var InlineWorker = (function () {
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function InlineWorker(func, self) {
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var _this = this;
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_classCallCheck(this, InlineWorker);
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if (WORKER_ENABLED) {
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var functionBody = func.toString().trim().match(/^function\s*\w*\s*\([\w\s,]*\)\s*{([\w\W]*?)}$/)[1];
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var url = global.URL.createObjectURL(new global.Blob([functionBody], { type: "text/javascript" }));
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return new global.Worker(url);
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}
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this.self = self;
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this.self.postMessage = function (data) {
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setTimeout(function () {
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_this.onmessage({ data: data });
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}, 0);
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};
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setTimeout(function () {
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func.call(self);
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}, 0);
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}
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_createClass(InlineWorker, {
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postMessage: {
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value: function postMessage(data) {
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var _this = this;
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setTimeout(function () {
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_this.self.onmessage({ data: data });
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}, 0);
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}
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}
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});
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return InlineWorker;
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})();
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module.exports = InlineWorker;
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}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
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},{}]},{},[1])(1)
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});
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