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91fb674
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Parent(s):
8cdd81e
Upload recorder.js
Browse files- static/js/recorder.js +357 -0
static/js/recorder.js
ADDED
@@ -0,0 +1,357 @@
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1 |
+
(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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2 |
+
"use strict";
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3 |
+
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+
module.exports = require("./recorder").Recorder;
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5 |
+
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+
},{"./recorder":2}],2:[function(require,module,exports){
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7 |
+
'use strict';
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8 |
+
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9 |
+
var _createClass = (function () {
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10 |
+
function defineProperties(target, props) {
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+
for (var i = 0; i < props.length; i++) {
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12 |
+
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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15 |
+
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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+
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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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23 |
+
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24 |
+
var _inlineWorker = require('inline-worker');
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25 |
+
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var _inlineWorker2 = _interopRequireDefault(_inlineWorker);
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27 |
+
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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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+
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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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+
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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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+
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_classCallCheck(this, Recorder);
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+
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this.config = {
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45 |
+
bufferLen: 4096,
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46 |
+
numChannels: 2,
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mimeType: 'audio/wav'
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};
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this.recording = false;
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50 |
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this.callbacks = {
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51 |
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getBuffer: [],
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exportWAV: []
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};
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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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+
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this.node.onaudioprocess = function (e) {
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if (!_this.recording) return;
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+
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var buffer = [];
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63 |
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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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68 |
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buffer: buffer
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});
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70 |
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};
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71 |
+
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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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74 |
+
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var self = {};
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76 |
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this.worker = new _inlineWorker2.default(function () {
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77 |
+
var recLength = 0,
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78 |
+
recBuffers = [],
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+
sampleRate = undefined,
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80 |
+
numChannels = undefined;
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81 |
+
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82 |
+
self.onmessage = function (e) {
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83 |
+
switch (e.data.command) {
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84 |
+
case 'init':
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85 |
+
init(e.data.config);
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86 |
+
break;
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87 |
+
case 'record':
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88 |
+
record(e.data.buffer);
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89 |
+
break;
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90 |
+
case 'exportWAV':
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91 |
+
exportWAV(e.data.type);
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92 |
+
break;
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93 |
+
case 'getBuffer':
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94 |
+
getBuffer();
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95 |
+
break;
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96 |
+
case 'clear':
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clear();
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98 |
+
break;
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99 |
+
}
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100 |
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};
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101 |
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102 |
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function init(config) {
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103 |
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sampleRate = config.sampleRate;
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104 |
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numChannels = config.numChannels;
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105 |
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initBuffers();
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106 |
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}
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107 |
+
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108 |
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function record(inputBuffer) {
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109 |
+
for (var channel = 0; channel < numChannels; channel++) {
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110 |
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recBuffers[channel].push(inputBuffer[channel]);
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111 |
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}
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112 |
+
recLength += inputBuffer[0].length;
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113 |
+
}
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114 |
+
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115 |
+
function exportWAV(type) {
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116 |
+
var buffers = [];
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117 |
+
for (var channel = 0; channel < numChannels; channel++) {
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118 |
+
buffers.push(mergeBuffers(recBuffers[channel], recLength));
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119 |
+
}
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120 |
+
var interleaved = undefined;
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121 |
+
if (numChannels === 2) {
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122 |
+
interleaved = interleave(buffers[0], buffers[1]);
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123 |
+
} else {
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124 |
+
interleaved = buffers[0];
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125 |
+
}
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126 |
+
var dataview = encodeWAV(interleaved);
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127 |
+
var audioBlob = new Blob([dataview], { type: type });
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128 |
+
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129 |
+
self.postMessage({ command: 'exportWAV', data: audioBlob });
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130 |
+
}
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131 |
+
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132 |
+
function getBuffer() {
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133 |
+
var buffers = [];
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134 |
+
for (var channel = 0; channel < numChannels; channel++) {
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135 |
+
buffers.push(mergeBuffers(recBuffers[channel], recLength));
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136 |
+
}
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137 |
+
self.postMessage({ command: 'getBuffer', data: buffers });
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138 |
+
}
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139 |
+
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140 |
+
function clear() {
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141 |
+
recLength = 0;
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142 |
+
recBuffers = [];
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143 |
+
initBuffers();
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144 |
+
}
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145 |
+
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146 |
+
function initBuffers() {
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147 |
+
for (var channel = 0; channel < numChannels; channel++) {
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148 |
+
recBuffers[channel] = [];
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149 |
+
}
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150 |
+
}
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151 |
+
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152 |
+
function mergeBuffers(recBuffers, recLength) {
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153 |
+
var result = new Float32Array(recLength);
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154 |
+
var offset = 0;
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155 |
+
for (var i = 0; i < recBuffers.length; i++) {
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156 |
+
result.set(recBuffers[i], offset);
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157 |
+
offset += recBuffers[i].length;
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158 |
+
}
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159 |
+
return result;
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160 |
+
}
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161 |
+
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162 |
+
function interleave(inputL, inputR) {
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163 |
+
var length = inputL.length + inputR.length;
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164 |
+
var result = new Float32Array(length);
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165 |
+
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166 |
+
var index = 0,
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167 |
+
inputIndex = 0;
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168 |
+
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169 |
+
while (index < length) {
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170 |
+
result[index++] = inputL[inputIndex];
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171 |
+
result[index++] = inputR[inputIndex];
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172 |
+
inputIndex++;
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173 |
+
}
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174 |
+
return result;
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175 |
+
}
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176 |
+
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177 |
+
function floatTo16BitPCM(output, offset, input) {
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178 |
+
for (var i = 0; i < input.length; i++, offset += 2) {
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179 |
+
var s = Math.max(-1, Math.min(1, input[i]));
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180 |
+
output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
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181 |
+
}
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182 |
+
}
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183 |
+
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184 |
+
function writeString(view, offset, string) {
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185 |
+
for (var i = 0; i < string.length; i++) {
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186 |
+
view.setUint8(offset + i, string.charCodeAt(i));
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187 |
+
}
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188 |
+
}
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189 |
+
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190 |
+
function encodeWAV(samples) {
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191 |
+
var buffer = new ArrayBuffer(44 + samples.length * 2);
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192 |
+
var view = new DataView(buffer);
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193 |
+
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194 |
+
/* RIFF identifier */
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195 |
+
writeString(view, 0, 'RIFF');
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196 |
+
/* RIFF chunk length */
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197 |
+
view.setUint32(4, 36 + samples.length * 2, true);
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198 |
+
/* RIFF type */
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199 |
+
writeString(view, 8, 'WAVE');
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200 |
+
/* format chunk identifier */
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201 |
+
writeString(view, 12, 'fmt ');
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202 |
+
/* format chunk length */
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203 |
+
view.setUint32(16, 16, true);
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204 |
+
/* sample format (raw) */
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205 |
+
view.setUint16(20, 1, true);
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206 |
+
/* channel count */
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207 |
+
view.setUint16(22, numChannels, true);
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208 |
+
/* sample rate */
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209 |
+
view.setUint32(24, sampleRate, true);
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210 |
+
/* byte rate (sample rate * block align) */
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211 |
+
view.setUint32(28, sampleRate * 4, true);
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212 |
+
/* block align (channel count * bytes per sample) */
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213 |
+
view.setUint16(32, numChannels * 2, true);
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214 |
+
/* bits per sample */
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215 |
+
view.setUint16(34, 16, true);
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216 |
+
/* data chunk identifier */
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217 |
+
writeString(view, 36, 'data');
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218 |
+
/* data chunk length */
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219 |
+
view.setUint32(40, samples.length * 2, true);
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220 |
+
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221 |
+
floatTo16BitPCM(view, 44, samples);
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222 |
+
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223 |
+
return view;
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224 |
+
}
|
225 |
+
}, self);
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226 |
+
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227 |
+
this.worker.postMessage({
|
228 |
+
command: 'init',
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229 |
+
config: {
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230 |
+
sampleRate: this.context.sampleRate,
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231 |
+
numChannels: this.config.numChannels
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232 |
+
}
|
233 |
+
});
|
234 |
+
|
235 |
+
this.worker.onmessage = function (e) {
|
236 |
+
var cb = _this.callbacks[e.data.command].pop();
|
237 |
+
if (typeof cb == 'function') {
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238 |
+
cb(e.data.data);
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239 |
+
}
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240 |
+
};
|
241 |
+
}
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242 |
+
|
243 |
+
_createClass(Recorder, [{
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244 |
+
key: 'record',
|
245 |
+
value: function record() {
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246 |
+
this.recording = true;
|
247 |
+
}
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248 |
+
}, {
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249 |
+
key: 'stop',
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250 |
+
value: function stop() {
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251 |
+
this.recording = false;
|
252 |
+
}
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253 |
+
}, {
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254 |
+
key: 'clear',
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255 |
+
value: function clear() {
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256 |
+
this.worker.postMessage({ command: 'clear' });
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257 |
+
}
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258 |
+
}, {
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259 |
+
key: 'getBuffer',
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260 |
+
value: function getBuffer(cb) {
|
261 |
+
cb = cb || this.config.callback;
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262 |
+
if (!cb) throw new Error('Callback not set');
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263 |
+
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264 |
+
this.callbacks.getBuffer.push(cb);
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265 |
+
|
266 |
+
this.worker.postMessage({ command: 'getBuffer' });
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267 |
+
}
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268 |
+
}, {
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269 |
+
key: 'exportWAV',
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270 |
+
value: function exportWAV(cb, mimeType) {
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271 |
+
mimeType = mimeType || this.config.mimeType;
|
272 |
+
cb = cb || this.config.callback;
|
273 |
+
if (!cb) throw new Error('Callback not set');
|
274 |
+
|
275 |
+
this.callbacks.exportWAV.push(cb);
|
276 |
+
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277 |
+
this.worker.postMessage({
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278 |
+
command: 'exportWAV',
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279 |
+
type: mimeType
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280 |
+
});
|
281 |
+
}
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282 |
+
}], [{
|
283 |
+
key: 'forceDownload',
|
284 |
+
value: function forceDownload(blob, filename) {
|
285 |
+
var url = (window.URL || window.webkitURL).createObjectURL(blob);
|
286 |
+
var link = window.document.createElement('a');
|
287 |
+
link.href = url;
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288 |
+
link.download = filename || 'output.wav';
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289 |
+
var click = document.createEvent("Event");
|
290 |
+
click.initEvent("click", true, true);
|
291 |
+
link.dispatchEvent(click);
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292 |
+
}
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293 |
+
}]);
|
294 |
+
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295 |
+
return Recorder;
|
296 |
+
})();
|
297 |
+
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298 |
+
exports.default = Recorder;
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299 |
+
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300 |
+
},{"inline-worker":3}],3:[function(require,module,exports){
|
301 |
+
"use strict";
|
302 |
+
|
303 |
+
module.exports = require("./inline-worker");
|
304 |
+
},{"./inline-worker":4}],4:[function(require,module,exports){
|
305 |
+
(function (global){
|
306 |
+
"use strict";
|
307 |
+
|
308 |
+
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; }; })();
|
309 |
+
|
310 |
+
var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
|
311 |
+
|
312 |
+
var WORKER_ENABLED = !!(global === global.window && global.URL && global.Blob && global.Worker);
|
313 |
+
|
314 |
+
var InlineWorker = (function () {
|
315 |
+
function InlineWorker(func, self) {
|
316 |
+
var _this = this;
|
317 |
+
|
318 |
+
_classCallCheck(this, InlineWorker);
|
319 |
+
|
320 |
+
if (WORKER_ENABLED) {
|
321 |
+
var functionBody = func.toString().trim().match(/^function\s*\w*\s*\([\w\s,]*\)\s*{([\w\W]*?)}$/)[1];
|
322 |
+
var url = global.URL.createObjectURL(new global.Blob([functionBody], { type: "text/javascript" }));
|
323 |
+
|
324 |
+
return new global.Worker(url);
|
325 |
+
}
|
326 |
+
|
327 |
+
this.self = self;
|
328 |
+
this.self.postMessage = function (data) {
|
329 |
+
setTimeout(function () {
|
330 |
+
_this.onmessage({ data: data });
|
331 |
+
}, 0);
|
332 |
+
};
|
333 |
+
|
334 |
+
setTimeout(function () {
|
335 |
+
func.call(self);
|
336 |
+
}, 0);
|
337 |
+
}
|
338 |
+
|
339 |
+
_createClass(InlineWorker, {
|
340 |
+
postMessage: {
|
341 |
+
value: function postMessage(data) {
|
342 |
+
var _this = this;
|
343 |
+
|
344 |
+
setTimeout(function () {
|
345 |
+
_this.self.onmessage({ data: data });
|
346 |
+
}, 0);
|
347 |
+
}
|
348 |
+
}
|
349 |
+
});
|
350 |
+
|
351 |
+
return InlineWorker;
|
352 |
+
})();
|
353 |
+
|
354 |
+
module.exports = InlineWorker;
|
355 |
+
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
|
356 |
+
},{}]},{},[1])(1)
|
357 |
+
});
|