[ { "path": ".eslintrc.js", "content": "module.exports = {\n \"env\": {\n \"es6\": true,\n },\n \"extends\": \"google\",\n \"rules\": {\n // the 'rest' parameter for |arguments| might not be supported in some\n // old version of browsers. See also:\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters#Browser_compatibility\n \"prefer-rest-params\": 0,\n }\n};\n" }, { "path": ".gitignore", "content": ".DS_Store\nnpm-debug.log\nnode_modules/\npvt/\npackage-lock.json\ndoc/\n\n.firebaserc\n404.html\ndatabase.rules.json\nfirebase.json\n./index.html\n" }, { "path": ".travis.yml", "content": "dist: trusty\n\nlanguage: node_js\n\nnode_js:\n - 7\n\naddons:\n apt:\n packages:\n - google-chrome-stable\n\ninstall:\n - npm install\n\nbefore_script:\n - export CHROME_BIN=chromium-browser\n - export DISPLAY=:99.0\n - sh -e /etc/init.d/xvfb start\n - sleep 3\n\nscript:\n - npm run build-all\n - npm test" }, { "path": "CONTRIBUTING.md", "content": "# How to become a contributor and submit your own code\n\n## Contributor License Agreements\n\nWe'd love to accept your sample apps and patches! Before we can take them, we have to jump a couple of legal hurdles.\n\nPlease fill out either the individual or corporate Contributor License Agreement (CLA).\n * If you are an individual writing original source code and you're sure you own the intellectual property, then you'll need to sign an [individual CLA](https://developers.google.com/open-source/cla/individual).\n * If you work for a company that wants to allow you to contribute your work, then you'll need to sign a [corporate CLA](https://developers.google.com/open-source/cla/corporate).\n\nFollow either of the two links above to access the appropriate CLA and instructions for how to sign and return it. Once we receive it, we'll be able to accept your pull requests.\n\n## Contributing A Patch\n\n1. Submit an issue describing your proposed change to the repo in question.\n1. The repo owner will respond to your issue promptly.\n1. If your proposed change is accepted, and you haven't already done so, sign a Contributor License Agreement (see details above).\n1. Fork the desired repo, develop and test your code changes.\n1. Ensure that your code adheres to the existing style in the sample to which you are contributing.\n1. Submit a pull request.\n" }, { "path": "LICENSE", "content": "\n Apache License\n Version 2.0, January 2004\n http://www.apache.org/licenses/\n\n TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n 1. Definitions.\n\n \"License\" shall mean the terms and conditions for use, reproduction,\n and distribution as defined by Sections 1 through 9 of this document.\n\n \"Licensor\" shall mean the copyright owner or entity authorized by\n the copyright owner that is granting the License.\n\n \"Legal Entity\" shall mean the union of the acting entity and all\n other entities that control, are controlled by, or are under common\n control with that entity. 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However, in accepting such obligations, You may act only\n on Your own behalf and on Your sole responsibility, not on behalf\n of any other Contributor, and only if You agree to indemnify,\n defend, and hold each Contributor harmless for any liability\n incurred by, or claims asserted against, such Contributor by reason\n of your accepting any such warranty or additional liability.\n\n END OF TERMS AND CONDITIONS\n\n APPENDIX: How to apply the Apache License to your work.\n\n To apply the Apache License to your work, attach the following\n boilerplate notice, with the fields enclosed by brackets \"[]\"\n replaced with your own identifying information. (Don't include\n the brackets!) The text should be enclosed in the appropriate\n comment syntax for the file format. We also recommend that a\n file or class name and description of purpose be included on the\n same \"printed page\" as the copyright notice for easier\n identification within third-party archives.\n\n Copyright 2016 Google, Inc.\n\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n" }, { "path": "README.md", "content": "# [Resonance Audio SDK](//developers.google.com/resonance-audio) for Web [![Travis CI](https://travis-ci.org/resonance-audio/resonance-audio-web-sdk.svg?branch=master)](https://travis-ci.org/resonance-audio/resonance-audio-web-sdk)\n\nResonance Audio is a real-time JavaScript SDK that lets you add spatial audio to your web applications using [Web Audio](//developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API).\n\nCopyright (c) 2017 Google Inc. All rights reserved.\n\n## Getting Started\n\nConsult our [online documentation](//developers.google.com/resonance-audio/develop/web/getting-started) for more information.\n\nTo learn more about how Resonance Audio works, see\n[https://developers.google.com/resonance-audio/discover/concepts](https://developers.google.com/resonance-audio/discover/concepts)\n" }, { "path": "_config.yml", "content": "theme: jekyll-theme-cayman" }, { "path": "build/resonance-audio.js", "content": "(function webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory();\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine([], factory);\n\telse {\n\t\tvar a = factory();\n\t\tfor(var i in a) (typeof exports === 'object' ? exports : root)[i] = a[i];\n\t}\n})(this, function() {\nreturn /******/ (function(modules) { // webpackBootstrap\n/******/ \t// The module cache\n/******/ \tvar installedModules = {};\n/******/\n/******/ \t// The require function\n/******/ \tfunction __webpack_require__(moduleId) {\n/******/\n/******/ \t\t// Check if module is in cache\n/******/ \t\tif(installedModules[moduleId]) {\n/******/ \t\t\treturn installedModules[moduleId].exports;\n/******/ \t\t}\n/******/ \t\t// Create a new module (and put it into the cache)\n/******/ \t\tvar module = installedModules[moduleId] = {\n/******/ \t\t\ti: moduleId,\n/******/ \t\t\tl: false,\n/******/ \t\t\texports: {}\n/******/ \t\t};\n/******/\n/******/ \t\t// Execute the module function\n/******/ \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n/******/\n/******/ \t\t// Flag the module as loaded\n/******/ \t\tmodule.l = true;\n/******/\n/******/ \t\t// Return the exports of the module\n/******/ \t\treturn module.exports;\n/******/ \t}\n/******/\n/******/\n/******/ \t// expose the modules object (__webpack_modules__)\n/******/ \t__webpack_require__.m = modules;\n/******/\n/******/ \t// expose the module cache\n/******/ \t__webpack_require__.c = installedModules;\n/******/\n/******/ \t// define getter function for harmony exports\n/******/ \t__webpack_require__.d = function(exports, name, getter) {\n/******/ \t\tif(!__webpack_require__.o(exports, name)) {\n/******/ \t\t\tObject.defineProperty(exports, name, {\n/******/ \t\t\t\tconfigurable: false,\n/******/ \t\t\t\tenumerable: true,\n/******/ \t\t\t\tget: getter\n/******/ \t\t\t});\n/******/ \t\t}\n/******/ \t};\n/******/\n/******/ \t// getDefaultExport function for compatibility with non-harmony modules\n/******/ \t__webpack_require__.n = function(module) {\n/******/ \t\tvar getter = module && module.__esModule ?\n/******/ \t\t\tfunction getDefault() { return module['default']; } :\n/******/ \t\t\tfunction getModuleExports() { return module; };\n/******/ \t\t__webpack_require__.d(getter, 'a', getter);\n/******/ \t\treturn getter;\n/******/ \t};\n/******/\n/******/ \t// Object.prototype.hasOwnProperty.call\n/******/ \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n/******/\n/******/ \t// __webpack_public_path__\n/******/ \t__webpack_require__.p = \"\";\n/******/\n/******/ \t// Load entry module and return exports\n/******/ \treturn __webpack_require__(__webpack_require__.s = 10);\n/******/ })\n/************************************************************************/\n/******/ ([\n/* 0 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file ResonanceAudio library common utilities, mathematical constants,\n * and default values.\n * @author Andrew Allen \n */\n\n\n\n\n/**\n * @class Utils\n * @description A set of defaults, constants and utility functions.\n */\nfunction Utils() {};\n\n\n/**\n * Default input gain (linear).\n * @type {Number}\n */\nUtils.DEFAULT_SOURCE_GAIN = 1;\n\n\n/**\n * Maximum outside-the-room distance to attenuate far-field listener by.\n * @type {Number}\n */\nUtils.LISTENER_MAX_OUTSIDE_ROOM_DISTANCE = 1;\n\n\n/**\n * Maximum outside-the-room distance to attenuate far-field sources by.\n * @type {Number}\n */\nUtils.SOURCE_MAX_OUTSIDE_ROOM_DISTANCE = 1;\n\n\n/**\n * Default distance from listener when setting angle.\n * @type {Number}\n */\nUtils.DEFAULT_SOURCE_DISTANCE = 1;\n\n\n/** @type {Float32Array} */\nUtils.DEFAULT_POSITION = [0, 0, 0];\n\n\n/** @type {Float32Array} */\nUtils.DEFAULT_FORWARD = [0, 0, -1];\n\n\n/** @type {Float32Array} */\nUtils.DEFAULT_UP = [0, 1, 0];\n\n\n/** @type {Float32Array} */\nUtils.DEFAULT_RIGHT = [1, 0, 0];\n\n\n/**\n * @type {Number}\n */\nUtils.DEFAULT_SPEED_OF_SOUND = 343;\n\n\n/** Rolloff models (e.g. 'logarithmic', 'linear', or 'none').\n * @type {Array}\n */\nUtils.ATTENUATION_ROLLOFFS = ['logarithmic', 'linear', 'none'];\n\n\n/** Default rolloff model ('logarithmic').\n * @type {string}\n */\nUtils.DEFAULT_ATTENUATION_ROLLOFF = 'logarithmic';\n\n\n/** @type {Number} */\nUtils.DEFAULT_MIN_DISTANCE = 1;\n\n\n/** @type {Number} */\nUtils.DEFAULT_MAX_DISTANCE = 1000;\n\n\n/**\n * The default alpha (i.e. microphone pattern).\n * @type {Number}\n */\nUtils.DEFAULT_DIRECTIVITY_ALPHA = 0;\n\n\n/**\n * The default pattern sharpness (i.e. pattern exponent).\n * @type {Number}\n */\nUtils.DEFAULT_DIRECTIVITY_SHARPNESS = 1;\n\n\n/**\n * Default azimuth (in degrees). Suitable range is 0 to 360.\n * @type {Number}\n */\nUtils.DEFAULT_AZIMUTH = 0;\n\n\n/**\n * Default elevation (in degres).\n * Suitable range is from -90 (below) to 90 (above).\n * @type {Number}\n */\nUtils.DEFAULT_ELEVATION = 0;\n\n\n/**\n * The default ambisonic order.\n * @type {Number}\n */\nUtils.DEFAULT_AMBISONIC_ORDER = 1;\n\n\n/**\n * The default source width.\n * @type {Number}\n */\nUtils.DEFAULT_SOURCE_WIDTH = 0;\n\n\n/**\n * The maximum delay (in seconds) of a single wall reflection.\n * @type {Number}\n */\nUtils.DEFAULT_REFLECTION_MAX_DURATION = 0.5;\n\n\n/**\n * The -12dB cutoff frequency (in Hertz) for the lowpass filter applied to\n * all reflections.\n * @type {Number}\n */\nUtils.DEFAULT_REFLECTION_CUTOFF_FREQUENCY = 6400; // Uses -12dB cutoff.\n\n\n/**\n * The default reflection coefficients (where 0 = no reflection, 1 = perfect\n * reflection, -1 = mirrored reflection (180-degrees out of phase)).\n * @type {Object}\n */\nUtils.DEFAULT_REFLECTION_COEFFICIENTS = {\n left: 0, right: 0, front: 0, back: 0, down: 0, up: 0,\n};\n\n\n/**\n * The minimum distance we consider the listener to be to any given wall.\n * @type {Number}\n */\nUtils.DEFAULT_REFLECTION_MIN_DISTANCE = 1;\n\n\n/**\n * Default room dimensions (in meters).\n * @type {Object}\n */\nUtils.DEFAULT_ROOM_DIMENSIONS = {\n width: 0, height: 0, depth: 0,\n};\n\n\n/**\n * The multiplier to apply to distances from the listener to each wall.\n * @type {Number}\n */\nUtils.DEFAULT_REFLECTION_MULTIPLIER = 1;\n\n\n/** The default bandwidth (in octaves) of the center frequencies.\n * @type {Number}\n */\nUtils.DEFAULT_REVERB_BANDWIDTH = 1;\n\n\n/** The default multiplier applied when computing tail lengths.\n * @type {Number}\n */\nUtils.DEFAULT_REVERB_DURATION_MULTIPLIER = 1;\n\n\n/**\n * The late reflections pre-delay (in milliseconds).\n * @type {Number}\n */\nUtils.DEFAULT_REVERB_PREDELAY = 1.5;\n\n\n/**\n * The length of the beginning of the impulse response to apply a\n * half-Hann window to.\n * @type {Number}\n */\nUtils.DEFAULT_REVERB_TAIL_ONSET = 3.8;\n\n\n/**\n * The default gain (linear).\n * @type {Number}\n */\nUtils.DEFAULT_REVERB_GAIN = 0.01;\n\n\n/**\n * The maximum impulse response length (in seconds).\n * @type {Number}\n */\nUtils.DEFAULT_REVERB_MAX_DURATION = 3;\n\n\n/**\n * Center frequencies of the multiband late reflections.\n * Nine bands are computed by: 31.25 * 2^(0:8).\n * @type {Array}\n */\nUtils.DEFAULT_REVERB_FREQUENCY_BANDS = [\n 31.25, 62.5, 125, 250, 500, 1000, 2000, 4000, 8000,\n];\n\n\n/**\n * The number of frequency bands.\n */\nUtils.NUMBER_REVERB_FREQUENCY_BANDS =\n Utils.DEFAULT_REVERB_FREQUENCY_BANDS.length;\n\n\n/**\n * The default multiband RT60 durations (in seconds).\n * @type {Float32Array}\n */\nUtils.DEFAULT_REVERB_DURATIONS =\n new Float32Array(Utils.NUMBER_REVERB_FREQUENCY_BANDS);\n\n\n/**\n * Pre-defined frequency-dependent absorption coefficients for listed materials.\n * Currently supported materials are:\n * \n * @type {Object}\n */\nUtils.ROOM_MATERIAL_COEFFICIENTS = {\n 'transparent':\n [1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000],\n 'acoustic-ceiling-tiles':\n [0.672, 0.675, 0.700, 0.660, 0.720, 0.920, 0.880, 0.750, 1.000],\n 'brick-bare':\n [0.030, 0.030, 0.030, 0.030, 0.030, 0.040, 0.050, 0.070, 0.140],\n 'brick-painted':\n [0.006, 0.007, 0.010, 0.010, 0.020, 0.020, 0.020, 0.030, 0.060],\n 'concrete-block-coarse':\n [0.360, 0.360, 0.360, 0.440, 0.310, 0.290, 0.390, 0.250, 0.500],\n 'concrete-block-painted':\n [0.092, 0.090, 0.100, 0.050, 0.060, 0.070, 0.090, 0.080, 0.160],\n 'curtain-heavy':\n [0.073, 0.106, 0.140, 0.350, 0.550, 0.720, 0.700, 0.650, 1.000],\n 'fiber-glass-insulation':\n [0.193, 0.220, 0.220, 0.820, 0.990, 0.990, 0.990, 0.990, 1.000],\n 'glass-thin':\n [0.180, 0.169, 0.180, 0.060, 0.040, 0.030, 0.020, 0.020, 0.040],\n 'glass-thick':\n [0.350, 0.350, 0.350, 0.250, 0.180, 0.120, 0.070, 0.040, 0.080],\n 'grass':\n [0.050, 0.050, 0.150, 0.250, 0.400, 0.550, 0.600, 0.600, 0.600],\n 'linoleum-on-concrete':\n [0.020, 0.020, 0.020, 0.030, 0.030, 0.030, 0.030, 0.020, 0.040],\n 'marble':\n [0.010, 0.010, 0.010, 0.010, 0.010, 0.010, 0.020, 0.020, 0.040],\n 'metal':\n [0.030, 0.035, 0.040, 0.040, 0.050, 0.050, 0.050, 0.070, 0.090],\n 'parquet-on-concrete':\n [0.028, 0.030, 0.040, 0.040, 0.070, 0.060, 0.060, 0.070, 0.140],\n 'plaster-rough':\n [0.017, 0.018, 0.020, 0.030, 0.040, 0.050, 0.040, 0.030, 0.060],\n 'plaster-smooth':\n [0.011, 0.012, 0.013, 0.015, 0.020, 0.030, 0.040, 0.050, 0.100],\n 'plywood-panel':\n [0.400, 0.340, 0.280, 0.220, 0.170, 0.090, 0.100, 0.110, 0.220],\n 'polished-concrete-or-tile':\n [0.008, 0.008, 0.010, 0.010, 0.015, 0.020, 0.020, 0.020, 0.040],\n 'sheet-rock':\n [0.290, 0.279, 0.290, 0.100, 0.050, 0.040, 0.070, 0.090, 0.180],\n 'water-or-ice-surface':\n [0.006, 0.006, 0.008, 0.008, 0.013, 0.015, 0.020, 0.025, 0.050],\n 'wood-ceiling':\n [0.150, 0.147, 0.150, 0.110, 0.100, 0.070, 0.060, 0.070, 0.140],\n 'wood-panel':\n [0.280, 0.280, 0.280, 0.220, 0.170, 0.090, 0.100, 0.110, 0.220],\n 'uniform':\n [0.500, 0.500, 0.500, 0.500, 0.500, 0.500, 0.500, 0.500, 0.500],\n};\n\n\n/**\n * Default materials that use strings from\n * {@linkcode Utils.MATERIAL_COEFFICIENTS MATERIAL_COEFFICIENTS}\n * @type {Object}\n */\nUtils.DEFAULT_ROOM_MATERIALS = {\n left: 'transparent', right: 'transparent', front: 'transparent',\n back: 'transparent', down: 'transparent', up: 'transparent',\n};\n\n\n/**\n * The number of bands to average over when computing reflection coefficients.\n * @type {Number}\n */\nUtils.NUMBER_REFLECTION_AVERAGING_BANDS = 3;\n\n\n/**\n * The starting band to average over when computing reflection coefficients.\n * @type {Number}\n */\nUtils.ROOM_STARTING_AVERAGING_BAND = 4;\n\n\n/**\n * The minimum threshold for room volume.\n * Room model is disabled if volume is below this value.\n * @type {Number} */\nUtils.ROOM_MIN_VOLUME = 1e-4;\n\n\n/**\n * Air absorption coefficients per frequency band.\n * @type {Float32Array}\n */\nUtils.ROOM_AIR_ABSORPTION_COEFFICIENTS =\n [0.0006, 0.0006, 0.0007, 0.0008, 0.0010, 0.0015, 0.0026, 0.0060, 0.0207];\n\n\n/**\n * A scalar correction value to ensure Sabine and Eyring produce the same RT60\n * value at the cross-over threshold.\n * @type {Number}\n */\nUtils.ROOM_EYRING_CORRECTION_COEFFICIENT = 1.38;\n\n\n/**\n * @type {Number}\n * @private\n */\nUtils.TWO_PI = 6.28318530717959;\n\n\n/**\n * @type {Number}\n * @private\n */\nUtils.TWENTY_FOUR_LOG10 = 55.2620422318571;\n\n\n/**\n * @type {Number}\n * @private\n */\nUtils.LOG1000 = 6.90775527898214;\n\n\n/**\n * @type {Number}\n * @private\n */\nUtils.LOG2_DIV2 = 0.346573590279973;\n\n\n/**\n * @type {Number}\n * @private\n */\nUtils.DEGREES_TO_RADIANS = 0.017453292519943;\n\n\n/**\n * @type {Number}\n * @private\n */\nUtils.RADIANS_TO_DEGREES = 57.295779513082323;\n\n\n/**\n * @type {Number}\n * @private\n */\nUtils.EPSILON_FLOAT = 1e-8;\n\n\n/**\n * ResonanceAudio library logging function.\n * @type {Function}\n * @param {any} Message to be printed out.\n * @private\n */\nUtils.log = function() {\n window.console.log.apply(window.console, [\n '%c[ResonanceAudio]%c '\n + Array.prototype.slice.call(arguments).join(' ') + ' %c(@'\n + performance.now().toFixed(2) + 'ms)',\n 'background: #BBDEFB; color: #FF5722; font-weight: 700',\n 'font-weight: 400',\n 'color: #AAA',\n ]);\n};\n\n\n/**\n * Normalize a 3-d vector.\n * @param {Float32Array} v 3-element vector.\n * @return {Float32Array} 3-element vector.\n * @private\n */\nUtils.normalizeVector = function(v) {\n let n = Math.sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);\n if (n > exports.EPSILON_FLOAT) {\n n = 1 / n;\n v[0] *= n;\n v[1] *= n;\n v[2] *= n;\n }\n return v;\n};\n\n\n/**\n * Cross-product between two 3-d vectors.\n * @param {Float32Array} a 3-element vector.\n * @param {Float32Array} b 3-element vector.\n * @return {Float32Array}\n * @private\n */\nUtils.crossProduct = function(a, b) {\n return [\n a[1] * b[2] - a[2] * b[1],\n a[2] * b[0] - a[0] * b[2],\n a[0] * b[1] - a[1] * b[0],\n ];\n};\n\nmodule.exports = Utils;\n\n\n/***/ }),\n/* 1 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Spatially encodes input using weighted spherical harmonics.\n * @author Andrew Allen \n */\n\n\n\n// Internal dependencies.\nconst Tables = __webpack_require__(3);\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @class Encoder\n * @description Spatially encodes input using weighted spherical harmonics.\n * @param {AudioContext} context\n * Associated {@link\nhttps://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext}.\n * @param {Object} options\n * @param {Number} options.ambisonicOrder\n * Desired ambisonic order. Defaults to\n * {@linkcode Utils.DEFAULT_AMBISONIC_ORDER DEFAULT_AMBISONIC_ORDER}.\n * @param {Number} options.azimuth\n * Azimuth (in degrees). Defaults to\n * {@linkcode Utils.DEFAULT_AZIMUTH DEFAULT_AZIMUTH}.\n * @param {Number} options.elevation\n * Elevation (in degrees). Defaults to\n * {@linkcode Utils.DEFAULT_ELEVATION DEFAULT_ELEVATION}.\n * @param {Number} options.sourceWidth\n * Source width (in degrees). Where 0 degrees is a point source and 360 degrees\n * is an omnidirectional source. Defaults to\n * {@linkcode Utils.DEFAULT_SOURCE_WIDTH DEFAULT_SOURCE_WIDTH}.\n */\nfunction Encoder(context, options) {\n // Public variables.\n /**\n * Mono (1-channel) input {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} input\n * @memberof Encoder\n * @instance\n */\n /**\n * Ambisonic (multichannel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} output\n * @memberof Encoder\n * @instance\n */\n\n // Use defaults for undefined arguments.\n if (options == undefined) {\n options = {};\n }\n if (options.ambisonicOrder == undefined) {\n options.ambisonicOrder = Utils.DEFAULT_AMBISONIC_ORDER;\n }\n if (options.azimuth == undefined) {\n options.azimuth = Utils.DEFAULT_AZIMUTH;\n }\n if (options.elevation == undefined) {\n options.elevation = Utils.DEFAULT_ELEVATION;\n }\n if (options.sourceWidth == undefined) {\n options.sourceWidth = Utils.DEFAULT_SOURCE_WIDTH;\n }\n\n this._context = context;\n\n // Create I/O nodes.\n this.input = context.createGain();\n this._channelGain = [];\n this._merger = undefined;\n this.output = context.createGain();\n\n // Set initial order, angle and source width.\n this.setAmbisonicOrder(options.ambisonicOrder);\n this._azimuth = options.azimuth;\n this._elevation = options.elevation;\n this.setSourceWidth(options.sourceWidth);\n}\n\n/**\n * Set the desired ambisonic order.\n * @param {Number} ambisonicOrder Desired ambisonic order.\n */\nEncoder.prototype.setAmbisonicOrder = function(ambisonicOrder) {\n this._ambisonicOrder = Encoder.validateAmbisonicOrder(ambisonicOrder);\n\n this.input.disconnect();\n for (let i = 0; i < this._channelGain.length; i++) {\n this._channelGain[i].disconnect();\n }\n if (this._merger != undefined) {\n this._merger.disconnect();\n }\n delete this._channelGain;\n delete this._merger;\n\n // Create audio graph.\n let numChannels = (this._ambisonicOrder + 1) * (this._ambisonicOrder + 1);\n this._merger = this._context.createChannelMerger(numChannels);\n this._channelGain = new Array(numChannels);\n for (let i = 0; i < numChannels; i++) {\n this._channelGain[i] = this._context.createGain();\n this.input.connect(this._channelGain[i]);\n this._channelGain[i].connect(this._merger, 0, i);\n }\n this._merger.connect(this.output);\n};\n\n\n/**\n * Set the direction of the encoded source signal.\n * @param {Number} azimuth\n * Azimuth (in degrees). Defaults to\n * {@linkcode Utils.DEFAULT_AZIMUTH DEFAULT_AZIMUTH}.\n * @param {Number} elevation\n * Elevation (in degrees). Defaults to\n * {@linkcode Utils.DEFAULT_ELEVATION DEFAULT_ELEVATION}.\n */\nEncoder.prototype.setDirection = function(azimuth, elevation) {\n // Format input direction to nearest indices.\n if (azimuth == undefined || isNaN(azimuth)) {\n azimuth = Utils.DEFAULT_AZIMUTH;\n }\n if (elevation == undefined || isNaN(elevation)) {\n elevation = Utils.DEFAULT_ELEVATION;\n }\n\n // Store the formatted input (for updating source width).\n this._azimuth = azimuth;\n this._elevation = elevation;\n\n // Format direction for index lookups.\n azimuth = Math.round(azimuth % 360);\n if (azimuth < 0) {\n azimuth += 360;\n }\n elevation = Math.round(Math.min(90, Math.max(-90, elevation))) + 90;\n\n // Assign gains to each output.\n this._channelGain[0].gain.value = Tables.MAX_RE_WEIGHTS[this._spreadIndex][0];\n for (let i = 1; i <= this._ambisonicOrder; i++) {\n let degreeWeight = Tables.MAX_RE_WEIGHTS[this._spreadIndex][i];\n for (let j = -i; j <= i; j++) {\n let acnChannel = (i * i) + i + j;\n let elevationIndex = i * (i + 1) / 2 + Math.abs(j) - 1;\n let val = Tables.SPHERICAL_HARMONICS[1][elevation][elevationIndex];\n if (j != 0) {\n let azimuthIndex = Tables.SPHERICAL_HARMONICS_MAX_ORDER + j - 1;\n if (j < 0) {\n azimuthIndex = Tables.SPHERICAL_HARMONICS_MAX_ORDER + j;\n }\n val *= Tables.SPHERICAL_HARMONICS[0][azimuth][azimuthIndex];\n }\n this._channelGain[acnChannel].gain.value = val * degreeWeight;\n }\n }\n};\n\n\n/**\n * Set the source width (in degrees). Where 0 degrees is a point source and 360\n * degrees is an omnidirectional source.\n * @param {Number} sourceWidth (in degrees).\n */\nEncoder.prototype.setSourceWidth = function(sourceWidth) {\n // The MAX_RE_WEIGHTS is a 360 x (Tables.SPHERICAL_HARMONICS_MAX_ORDER+1)\n // size table.\n this._spreadIndex = Math.min(359, Math.max(0, Math.round(sourceWidth)));\n this.setDirection(this._azimuth, this._elevation);\n};\n\n\n/**\n * Validate the provided ambisonic order.\n * @param {Number} ambisonicOrder Desired ambisonic order.\n * @return {Number} Validated/adjusted ambisonic order.\n * @private\n */\nEncoder.validateAmbisonicOrder = function(ambisonicOrder) {\n if (isNaN(ambisonicOrder) || ambisonicOrder == undefined) {\n Utils.log('Error: Invalid ambisonic order',\n options.ambisonicOrder, '\\nUsing ambisonicOrder=1 instead.');\n ambisonicOrder = 1;\n } else if (ambisonicOrder < 1) {\n Utils.log('Error: Unable to render ambisonic order',\n options.ambisonicOrder, '(Min order is 1)',\n '\\nUsing min order instead.');\n ambisonicOrder = 1;\n } else if (ambisonicOrder > Tables.SPHERICAL_HARMONICS_MAX_ORDER) {\n Utils.log('Error: Unable to render ambisonic order',\n options.ambisonicOrder, '(Max order is',\n Tables.SPHERICAL_HARMONICS_MAX_ORDER, ')\\nUsing max order instead.');\n options.ambisonicOrder = Tables.SPHERICAL_HARMONICS_MAX_ORDER;\n }\n return ambisonicOrder;\n};\n\n\nmodule.exports = Encoder;\n\n\n/***/ }),\n/* 2 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Listener model to spatialize sources in an environment.\n * @author Andrew Allen \n */\n\n\n\n\n// Internal dependencies.\nconst Omnitone = __webpack_require__(12);\nconst Encoder = __webpack_require__(1);\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @class Listener\n * @description Listener model to spatialize sources in an environment.\n * @param {AudioContext} context\n * Associated {@link\nhttps://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext}.\n * @param {Object} options\n * @param {Number} options.ambisonicOrder\n * Desired ambisonic order. Defaults to\n * {@linkcode Utils.DEFAULT_AMBISONIC_ORDER DEFAULT_AMBISONIC_ORDER}.\n * @param {Float32Array} options.position\n * Initial position (in meters), where origin is the center of\n * the room. Defaults to\n * {@linkcode Utils.DEFAULT_POSITION DEFAULT_POSITION}.\n * @param {Float32Array} options.forward\n * The listener's initial forward vector. Defaults to\n * {@linkcode Utils.DEFAULT_FORWARD DEFAULT_FORWARD}.\n * @param {Float32Array} options.up\n * The listener's initial up vector. Defaults to\n * {@linkcode Utils.DEFAULT_UP DEFAULT_UP}.\n */\nfunction Listener(context, options) {\n // Public variables.\n /**\n * Position (in meters).\n * @member {Float32Array} position\n * @memberof Listener\n * @instance\n */\n /**\n * Ambisonic (multichannel) input {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} input\n * @memberof Listener\n * @instance\n */\n /**\n * Binaurally-rendered stereo (2-channel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} output\n * @memberof Listener\n * @instance\n */\n /**\n * Ambisonic (multichannel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} ambisonicOutput\n * @memberof Listener\n * @instance\n */\n // Use defaults for undefined arguments.\n if (options == undefined) {\n options = {};\n }\n if (options.ambisonicOrder == undefined) {\n options.ambisonicOrder = Utils.DEFAULT_AMBISONIC_ORDER;\n }\n if (options.position == undefined) {\n options.position = Utils.DEFAULT_POSITION.slice();\n }\n if (options.forward == undefined) {\n options.forward = Utils.DEFAULT_FORWARD.slice();\n }\n if (options.up == undefined) {\n options.up = Utils.DEFAULT_UP.slice();\n }\n\n // Member variables.\n this.position = new Float32Array(3);\n this._tempMatrix3 = new Float32Array(9);\n\n // Select the appropriate HRIR filters using 2-channel chunks since\n // multichannel audio is not yet supported by a majority of browsers.\n this._ambisonicOrder =\n Encoder.validateAmbisonicOrder(options.ambisonicOrder);\n\n // Create audio nodes.\n this._context = context;\n if (this._ambisonicOrder == 1) {\n this._renderer = Omnitone.Omnitone.createFOARenderer(context, {});\n } else if (this._ambisonicOrder > 1) {\n this._renderer = Omnitone.Omnitone.createHOARenderer(context, {\n ambisonicOrder: this._ambisonicOrder,\n });\n }\n\n // These nodes are created in order to safely asynchronously load Omnitone\n // while the rest of the scene is being created.\n this.input = context.createGain();\n this.output = context.createGain();\n this.ambisonicOutput = context.createGain();\n\n // Initialize Omnitone (async) and connect to audio graph when complete.\n let that = this;\n this._renderer.initialize().then(function() {\n // Connect pre-rotated soundfield to renderer.\n that.input.connect(that._renderer.input);\n\n // Connect rotated soundfield to ambisonic output.\n if (that._ambisonicOrder > 1) {\n that._renderer._hoaRotator.output.connect(that.ambisonicOutput);\n } else {\n that._renderer._foaRotator.output.connect(that.ambisonicOutput);\n }\n\n // Connect binaurally-rendered soundfield to binaural output.\n that._renderer.output.connect(that.output);\n });\n\n // Set orientation and update rotation matrix accordingly.\n this.setOrientation(options.forward[0], options.forward[1],\n options.forward[2], options.up[0], options.up[1], options.up[2]);\n};\n\n\n/**\n * Set the source's orientation using forward and up vectors.\n * @param {Number} forwardX\n * @param {Number} forwardY\n * @param {Number} forwardZ\n * @param {Number} upX\n * @param {Number} upY\n * @param {Number} upZ\n */\nListener.prototype.setOrientation = function(forwardX, forwardY, forwardZ,\n upX, upY, upZ) {\n let right = Utils.crossProduct([forwardX, forwardY, forwardZ],\n [upX, upY, upZ]);\n this._tempMatrix3[0] = right[0];\n this._tempMatrix3[1] = right[1];\n this._tempMatrix3[2] = right[2];\n this._tempMatrix3[3] = upX;\n this._tempMatrix3[4] = upY;\n this._tempMatrix3[5] = upZ;\n this._tempMatrix3[6] = forwardX;\n this._tempMatrix3[7] = forwardY;\n this._tempMatrix3[8] = forwardZ;\n this._renderer.setRotationMatrix3(this._tempMatrix3);\n};\n\n\n/**\n * Set the listener's position and orientation using a Three.js Matrix4 object.\n * @param {Object} matrix4\n * The Three.js Matrix4 object representing the listener's world transform.\n */\nListener.prototype.setFromMatrix = function(matrix4) {\n // Update ambisonic rotation matrix internally.\n this._renderer.setRotationMatrix4(matrix4.elements);\n\n // Extract position from matrix.\n this.position[0] = matrix4.elements[12];\n this.position[1] = matrix4.elements[13];\n this.position[2] = matrix4.elements[14];\n};\n\n\nmodule.exports = Listener;\n\n\n/***/ }),\n/* 3 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Pre-computed lookup tables for encoding ambisonic sources.\n * @author Andrew Allen \n */\n\n\n\n\n/**\n * Pre-computed Spherical Harmonics Coefficients.\n *\n * This function generates an efficient lookup table of SH coefficients. It\n * exploits the way SHs are generated (i.e. Ylm = Nlm * Plm * Em). Since Nlm\n * & Plm coefficients only depend on theta, and Em only depends on phi, we\n * can separate the equation along these lines. Em does not depend on\n * degree, so we only need to compute (2 * l) per azimuth Em total and\n * Nlm * Plm is symmetrical across indexes, so only positive indexes are\n * computed ((l + 1) * (l + 2) / 2 - 1) per elevation.\n * @type {Float32Array}\n */\nexports.SPHERICAL_HARMONICS =\n[\n [\n [0.000000, 0.000000, 0.000000, 1.000000, 1.000000, 1.000000],\n [0.052336, 0.034899, 0.017452, 0.999848, 0.999391, 0.998630],\n [0.104528, 0.069756, 0.034899, 0.999391, 0.997564, 0.994522],\n [0.156434, 0.104528, 0.052336, 0.998630, 0.994522, 0.987688],\n [0.207912, 0.139173, 0.069756, 0.997564, 0.990268, 0.978148],\n [0.258819, 0.173648, 0.087156, 0.996195, 0.984808, 0.965926],\n [0.309017, 0.207912, 0.104528, 0.994522, 0.978148, 0.951057],\n [0.358368, 0.241922, 0.121869, 0.992546, 0.970296, 0.933580],\n [0.406737, 0.275637, 0.139173, 0.990268, 0.961262, 0.913545],\n [0.453990, 0.309017, 0.156434, 0.987688, 0.951057, 0.891007],\n [0.500000, 0.342020, 0.173648, 0.984808, 0.939693, 0.866025],\n 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0.145420, 0.827194, 0.521871, 0.149181],\n [0.829038, 0.559193, 0.530955, 0.802965, 0.270803,\n 0.180944, 0.834347, 0.502011, 0.138237],\n [0.838671, 0.544639, 0.555052, 0.791154, 0.256891,\n 0.216730, 0.839422, 0.481753, 0.127722],\n [0.848048, 0.529919, 0.578778, 0.778378, 0.243192,\n 0.252688, 0.842399, 0.461164, 0.117644],\n [0.857167, 0.515038, 0.602104, 0.764655, 0.229726,\n 0.288728, 0.843265, 0.440311, 0.108009],\n [0.866025, 0.500000, 0.625000, 0.750000, 0.216506,\n 0.324760, 0.842012, 0.419263, 0.098821],\n [0.874620, 0.484810, 0.647439, 0.734431, 0.203551,\n 0.360692, 0.838638, 0.398086, 0.090085],\n [0.882948, 0.469472, 0.669395, 0.717968, 0.190875,\n 0.396436, 0.833145, 0.376851, 0.081803],\n [0.891007, 0.453990, 0.690839, 0.700629, 0.178494,\n 0.431899, 0.825544, 0.355623, 0.073974],\n [0.898794, 0.438371, 0.711746, 0.682437, 0.166423,\n 0.466993, 0.815850, 0.334472, 0.066599],\n [0.906308, 0.422618, 0.732091, 0.663414, 0.154678,\n 0.501627, 0.804083, 0.313464, 0.059674],\n [0.913545, 0.406737, 0.751848, 0.643582, 0.143271,\n 0.535715, 0.790270, 0.292666, 0.053196],\n [0.920505, 0.390731, 0.770994, 0.622967, 0.132217,\n 0.569169, 0.774442, 0.272143, 0.047160],\n [0.927184, 0.374607, 0.789505, 0.601592, 0.121529,\n 0.601904, 0.756637, 0.251960, 0.041559],\n [0.933580, 0.358368, 0.807359, 0.579484, 0.111222,\n 0.633837, 0.736898, 0.232180, 0.036385],\n [0.939693, 0.342020, 0.824533, 0.556670, 0.101306,\n 0.664885, 0.715274, 0.212865, 0.031630],\n [0.945519, 0.325568, 0.841008, 0.533178, 0.091794,\n 0.694969, 0.691816, 0.194075, 0.027281],\n [0.951057, 0.309017, 0.856763, 0.509037, 0.082698,\n 0.724012, 0.666583, 0.175868, 0.023329],\n [0.956305, 0.292372, 0.871778, 0.484275, 0.074029,\n 0.751940, 0.639639, 0.158301, 0.019758],\n [0.961262, 0.275637, 0.886036, 0.458924, 0.065797,\n 0.778680, 0.611050, 0.141427, 0.016556],\n [0.965926, 0.258819, 0.899519, 0.433013, 0.058013,\n 0.804164, 0.580889, 0.125300, 0.013707],\n [0.970296, 0.241922, 0.912211, 0.406574, 0.050685,\n 0.828326, 0.549233, 0.109969, 0.011193],\n [0.974370, 0.224951, 0.924096, 0.379641, 0.043823,\n 0.851105, 0.516162, 0.095481, 0.008999],\n [0.978148, 0.207912, 0.935159, 0.352244, 0.037436,\n 0.872441, 0.481759, 0.081880, 0.007105],\n [0.981627, 0.190809, 0.945388, 0.324419, 0.031530,\n 0.892279, 0.446114, 0.069209, 0.005492],\n [0.984808, 0.173648, 0.954769, 0.296198, 0.026114,\n 0.910569, 0.409317, 0.057505, 0.004140],\n [0.987688, 0.156434, 0.963292, 0.267617, 0.021193,\n 0.927262, 0.371463, 0.046806, 0.003026],\n [0.990268, 0.139173, 0.970946, 0.238709, 0.016774,\n 0.942316, 0.332649, 0.037143, 0.002131],\n [0.992546, 0.121869, 0.977722, 0.209511, 0.012862,\n 0.955693, 0.292976, 0.028547, 0.001431],\n [0.994522, 0.104528, 0.983611, 0.180057, 0.009462,\n 0.967356, 0.252544, 0.021043, 0.000903],\n [0.996195, 0.087156, 0.988606, 0.150384, 0.006578,\n 0.977277, 0.211460, 0.014654, 0.000523],\n [0.997564, 0.069756, 0.992701, 0.120527, 0.004214,\n 0.985429, 0.169828, 0.009400, 0.000268],\n [0.998630, 0.052336, 0.995891, 0.090524, 0.002372,\n 0.991791, 0.127757, 0.005297, 0.000113],\n [0.999391, 0.034899, 0.998173, 0.060411, 0.001055,\n 0.996348, 0.085356, 0.002357, 0.000034],\n [0.999848, 0.017452, 0.999543, 0.030224, 0.000264,\n 0.999086, 0.042733, 0.000590, 0.000004],\n [1.000000, -0.000000, 1.000000, -0.000000, 0.000000,\n 1.000000, -0.000000, 0.000000, -0.000000],\n ],\n];\n\n\n/** @type {Number} */\nexports.SPHERICAL_HARMONICS_AZIMUTH_RESOLUTION =\n exports.SPHERICAL_HARMONICS[0].length;\n\n\n/** @type {Number} */\nexports.SPHERICAL_HARMONICS_ELEVATION_RESOLUTION =\n exports.SPHERICAL_HARMONICS[1].length;\n\n\n/**\n * The maximum allowed ambisonic order.\n * @type {Number}\n */\nexports.SPHERICAL_HARMONICS_MAX_ORDER =\n exports.SPHERICAL_HARMONICS[0][0].length / 2;\n\n\n/**\n * Pre-computed per-band weighting coefficients for producing energy-preserving\n * Max-Re sources.\n */\nexports.MAX_RE_WEIGHTS =\n[\n [1.000000, 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(function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Source model to spatialize an audio buffer.\n * @author Andrew Allen \n */\n\n\n\n\n// Internal dependencies.\nconst Directivity = __webpack_require__(5);\nconst Attenuation = __webpack_require__(6);\nconst Encoder = __webpack_require__(1);\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @class Source\n * @description Source model to spatialize an audio buffer.\n * @param {ResonanceAudio} scene Associated {@link ResonanceAudio\n * ResonanceAudio} instance.\n * @param {Object} options\n * @param {Float32Array} options.position\n * The source's initial position (in meters), where origin is the center of\n * the room. Defaults to {@linkcode Utils.DEFAULT_POSITION DEFAULT_POSITION}.\n * @param {Float32Array} options.forward\n * The source's initial forward vector. Defaults to\n * {@linkcode Utils.DEFAULT_FORWARD DEFAULT_FORWARD}.\n * @param {Float32Array} options.up\n * The source's initial up vector. Defaults to\n * {@linkcode Utils.DEFAULT_UP DEFAULT_UP}.\n * @param {Number} options.minDistance\n * Min. distance (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_MIN_DISTANCE DEFAULT_MIN_DISTANCE}.\n * @param {Number} options.maxDistance\n * Max. distance (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_MAX_DISTANCE DEFAULT_MAX_DISTANCE}.\n * @param {string} options.rolloff\n * Rolloff model to use, chosen from options in\n * {@linkcode Utils.ATTENUATION_ROLLOFFS ATTENUATION_ROLLOFFS}. Defaults to\n * {@linkcode Utils.DEFAULT_ATTENUATION_ROLLOFF DEFAULT_ATTENUATION_ROLLOFF}.\n * @param {Number} options.gain Input gain (linear). Defaults to\n * {@linkcode Utils.DEFAULT_SOURCE_GAIN DEFAULT_SOURCE_GAIN}.\n * @param {Number} options.alpha Directivity alpha. Defaults to\n * {@linkcode Utils.DEFAULT_DIRECTIVITY_ALPHA DEFAULT_DIRECTIVITY_ALPHA}.\n * @param {Number} options.sharpness Directivity sharpness. Defaults to\n * {@linkcode Utils.DEFAULT_DIRECTIVITY_SHARPNESS\n * DEFAULT_DIRECTIVITY_SHARPNESS}.\n * @param {Number} options.sourceWidth\n * Source width (in degrees). Where 0 degrees is a point source and 360 degrees\n * is an omnidirectional source. Defaults to\n * {@linkcode Utils.DEFAULT_SOURCE_WIDTH DEFAULT_SOURCE_WIDTH}.\n */\nfunction Source(scene, options) {\n // Public variables.\n /**\n * Mono (1-channel) input {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} input\n * @memberof Source\n * @instance\n */\n /**\n *\n */\n\n // Use defaults for undefined arguments.\n if (options == undefined) {\n options = {};\n }\n if (options.position == undefined) {\n options.position = Utils.DEFAULT_POSITION.slice();\n }\n if (options.forward == undefined) {\n options.forward = Utils.DEFAULT_FORWARD.slice();\n }\n if (options.up == undefined) {\n options.up = Utils.DEFAULT_UP.slice();\n }\n if (options.minDistance == undefined) {\n options.minDistance = Utils.DEFAULT_MIN_DISTANCE;\n }\n if (options.maxDistance == undefined) {\n options.maxDistance = Utils.DEFAULT_MAX_DISTANCE;\n }\n if (options.rolloff == undefined) {\n options.rolloff = Utils.DEFAULT_ROLLOFF;\n }\n if (options.gain == undefined) {\n options.gain = Utils.DEFAULT_SOURCE_GAIN;\n }\n if (options.alpha == undefined) {\n options.alpha = Utils.DEFAULT_DIRECTIVITY_ALPHA;\n }\n if (options.sharpness == undefined) {\n options.sharpness = Utils.DEFAULT_DIRECTIVITY_SHARPNESS;\n }\n if (options.sourceWidth == undefined) {\n options.sourceWidth = Utils.DEFAULT_SOURCE_WIDTH;\n }\n\n // Member variables.\n this._scene = scene;\n this._position = options.position;\n this._forward = options.forward;\n this._up = options.up;\n this._dx = new Float32Array(3);\n this._right = Utils.crossProduct(this._forward, this._up);\n\n // Create audio nodes.\n let context = scene._context;\n this.input = context.createGain();\n this._directivity = new Directivity(context, {\n alpha: options.alpha,\n sharpness: options.sharpness,\n });\n this._toEarly = context.createGain();\n this._toLate = context.createGain();\n this._attenuation = new Attenuation(context, {\n minDistance: options.minDistance,\n maxDistance: options.maxDistance,\n rolloff: options.rolloff,\n });\n this._encoder = new Encoder(context, {\n ambisonicOrder: scene._ambisonicOrder,\n sourceWidth: options.sourceWidth,\n });\n\n // Connect nodes.\n this.input.connect(this._toLate);\n this._toLate.connect(scene._room.late.input);\n\n this.input.connect(this._attenuation.input);\n this._attenuation.output.connect(this._toEarly);\n this._toEarly.connect(scene._room.early.input);\n\n this._attenuation.output.connect(this._directivity.input);\n this._directivity.output.connect(this._encoder.input);\n\n this._encoder.output.connect(scene._listener.input);\n\n // Assign initial conditions.\n this.setPosition(\n options.position[0], options.position[1], options.position[2]);\n this.input.gain.value = options.gain;\n};\n\n\n/**\n * Set source's position (in meters), where origin is the center of\n * the room.\n * @param {Number} x\n * @param {Number} y\n * @param {Number} z\n */\nSource.prototype.setPosition = function(x, y, z) {\n // Assign new position.\n this._position[0] = x;\n this._position[1] = y;\n this._position[2] = z;\n\n // Handle far-field effect.\n let distance = this._scene._room.getDistanceOutsideRoom(\n this._position[0], this._position[1], this._position[2]);\n let gain = _computeDistanceOutsideRoom(distance);\n this._toLate.gain.value = gain;\n this._toEarly.gain.value = gain;\n\n this._update();\n};\n\n\n// Update the source when changing the listener's position.\nSource.prototype._update = function() {\n // Compute distance to listener.\n for (let i = 0; i < 3; i++) {\n this._dx[i] = this._position[i] - this._scene._listener.position[i];\n }\n let distance = Math.sqrt(this._dx[0] * this._dx[0] +\n this._dx[1] * this._dx[1] + this._dx[2] * this._dx[2]);\n if (distance > 0) {\n // Normalize direction vector.\n this._dx[0] /= distance;\n this._dx[1] /= distance;\n this._dx[2] /= distance;\n }\n\n // Compuete angle of direction vector.\n let azimuth = Math.atan2(-this._dx[0], this._dx[2]) *\n Utils.RADIANS_TO_DEGREES;\n let elevation = Math.atan2(this._dx[1], Math.sqrt(this._dx[0] * this._dx[0] +\n this._dx[2] * this._dx[2])) * Utils.RADIANS_TO_DEGREES;\n\n // Set distance/directivity/direction values.\n this._attenuation.setDistance(distance);\n this._directivity.computeAngle(this._forward, this._dx);\n this._encoder.setDirection(azimuth, elevation);\n};\n\n\n/**\n * Set source's rolloff.\n * @param {string} rolloff\n * Rolloff model to use, chosen from options in\n * {@linkcode Utils.ATTENUATION_ROLLOFFS ATTENUATION_ROLLOFFS}.\n */\nSource.prototype.setRolloff = function(rolloff) {\n this._attenuation.setRolloff(rolloff);\n};\n\n\n/**\n * Set source's minimum distance (in meters).\n * @param {Number} minDistance\n */\nSource.prototype.setMinDistance = function(minDistance) {\n this._attenuation.minDistance = minDistance;\n};\n\n\n/**\n * Set source's maximum distance (in meters).\n * @param {Number} maxDistance\n */\nSource.prototype.setMaxDistance = function(maxDistance) {\n this._attenuation.maxDistance = maxDistance;\n};\n\n\n/**\n * Set source's gain (linear).\n * @param {Number} gain\n */\nSource.prototype.setGain = function(gain) {\n this.input.gain.value = gain;\n};\n\n\n/**\n * Set the source's orientation using forward and up vectors.\n * @param {Number} forwardX\n * @param {Number} forwardY\n * @param {Number} forwardZ\n * @param {Number} upX\n * @param {Number} upY\n * @param {Number} upZ\n */\nSource.prototype.setOrientation = function(forwardX, forwardY, forwardZ,\n upX, upY, upZ) {\n this._forward[0] = forwardX;\n this._forward[1] = forwardY;\n this._forward[2] = forwardZ;\n this._up[0] = upX;\n this._up[1] = upY;\n this._up[2] = upZ;\n this._right = Utils.crossProduct(this._forward, this._up);\n};\n\n\n// TODO(bitllama): Make sure this works with Three.js as intended.\n/**\n * Set source's position and orientation using a\n * Three.js modelViewMatrix object.\n * @param {Float32Array} matrix4\n * The Matrix4 representing the object position and rotation in world space.\n */\nSource.prototype.setFromMatrix = function(matrix4) {\n this._right[0] = matrix4.elements[0];\n this._right[1] = matrix4.elements[1];\n this._right[2] = matrix4.elements[2];\n this._up[0] = matrix4.elements[4];\n this._up[1] = matrix4.elements[5];\n this._up[2] = matrix4.elements[6];\n this._forward[0] = matrix4.elements[8];\n this._forward[1] = matrix4.elements[9];\n this._forward[2] = matrix4.elements[10];\n\n // Normalize to remove scaling.\n this._right = Utils.normalizeVector(this._right);\n this._up = Utils.normalizeVector(this._up);\n this._forward = Utils.normalizeVector(this._forward);\n\n // Update position.\n this.setPosition(\n matrix4.elements[12], matrix4.elements[13], matrix4.elements[14]);\n};\n\n\n/**\n * Set the source width (in degrees). Where 0 degrees is a point source and 360\n * degrees is an omnidirectional source.\n * @param {Number} sourceWidth (in degrees).\n */\nSource.prototype.setSourceWidth = function(sourceWidth) {\n this._encoder.setSourceWidth(sourceWidth);\n this.setPosition(this._position[0], this._position[1], this._position[2]);\n};\n\n\n/**\n * Set source's directivity pattern (defined by alpha), where 0 is an\n * omnidirectional pattern, 1 is a bidirectional pattern, 0.5 is a cardiod\n * pattern. The sharpness of the pattern is increased exponentially.\n * @param {Number} alpha\n * Determines directivity pattern (0 to 1).\n * @param {Number} sharpness\n * Determines the sharpness of the directivity pattern (1 to Inf).\n */\nSource.prototype.setDirectivityPattern = function(alpha, sharpness) {\n this._directivity.setPattern(alpha, sharpness);\n this.setPosition(this._position[0], this._position[1], this._position[2]);\n};\n\n\n/**\n * Determine the distance a source is outside of a room. Attenuate gain going\n * to the reflections and reverb when the source is outside of the room.\n * @param {Number} distance Distance in meters.\n * @return {Number} Gain (linear) of source.\n * @private\n */\nfunction _computeDistanceOutsideRoom(distance) {\n // We apply a linear ramp from 1 to 0 as the source is up to 1m outside.\n let gain = 1;\n if (distance > Utils.EPSILON_FLOAT) {\n gain = 1 - distance / Utils.SOURCE_MAX_OUTSIDE_ROOM_DISTANCE;\n\n // Clamp gain between 0 and 1.\n gain = Math.max(0, Math.min(1, gain));\n }\n return gain;\n}\n\n\nmodule.exports = Source;\n\n\n/***/ }),\n/* 5 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Directivity/occlusion filter.\n * @author Andrew Allen \n */\n\n\n\n// Internal dependencies.\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @class Directivity\n * @description Directivity/occlusion filter.\n * @param {AudioContext} context\n * Associated {@link\nhttps://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext}.\n * @param {Object} options\n * @param {Number} options.alpha\n * Determines directivity pattern (0 to 1). See\n * {@link Directivity#setPattern setPattern} for more details. Defaults to\n * {@linkcode Utils.DEFAULT_DIRECTIVITY_ALPHA DEFAULT_DIRECTIVITY_ALPHA}.\n * @param {Number} options.sharpness\n * Determines the sharpness of the directivity pattern (1 to Inf). See\n * {@link Directivity#setPattern setPattern} for more details. Defaults to\n * {@linkcode Utils.DEFAULT_DIRECTIVITY_SHARPNESS\n * DEFAULT_DIRECTIVITY_SHARPNESS}.\n */\nfunction Directivity(context, options) {\n // Public variables.\n /**\n * Mono (1-channel) input {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} input\n * @memberof Directivity\n * @instance\n */\n /**\n * Mono (1-channel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} output\n * @memberof Directivity\n * @instance\n */\n\n // Use defaults for undefined arguments.\n if (options == undefined) {\n options = {};\n }\n if (options.alpha == undefined) {\n options.alpha = Utils.DEFAULT_DIRECTIVITY_ALPHA;\n }\n if (options.sharpness == undefined) {\n options.sharpness = Utils.DEFAULT_DIRECTIVITY_SHARPNESS;\n }\n\n // Create audio node.\n this._context = context;\n this._lowpass = context.createBiquadFilter();\n\n // Initialize filter coefficients.\n this._lowpass.type = 'lowpass';\n this._lowpass.Q.value = 0;\n this._lowpass.frequency.value = context.sampleRate * 0.5;\n\n this._cosTheta = 0;\n this.setPattern(options.alpha, options.sharpness);\n\n // Input/Output proxy.\n this.input = this._lowpass;\n this.output = this._lowpass;\n}\n\n\n/**\n * Compute the filter using the source's forward orientation and the listener's\n * position.\n * @param {Float32Array} forward The source's forward vector.\n * @param {Float32Array} direction The direction from the source to the\n * listener.\n */\nDirectivity.prototype.computeAngle = function(forward, direction) {\n let forwardNorm = Utils.normalizeVector(forward);\n let directionNorm = Utils.normalizeVector(direction);\n let coeff = 1;\n if (this._alpha > Utils.EPSILON_FLOAT) {\n let cosTheta = forwardNorm[0] * directionNorm[0] +\n forwardNorm[1] * directionNorm[1] + forwardNorm[2] * directionNorm[2];\n coeff = (1 - this._alpha) + this._alpha * cosTheta;\n coeff = Math.pow(Math.abs(coeff), this._sharpness);\n }\n this._lowpass.frequency.value = this._context.sampleRate * 0.5 * coeff;\n};\n\n\n/**\n * Set source's directivity pattern (defined by alpha), where 0 is an\n * omnidirectional pattern, 1 is a bidirectional pattern, 0.5 is a cardiod\n * pattern. The sharpness of the pattern is increased exponenentially.\n * @param {Number} alpha\n * Determines directivity pattern (0 to 1).\n * @param {Number} sharpness\n * Determines the sharpness of the directivity pattern (1 to Inf).\n * DEFAULT_DIRECTIVITY_SHARPNESS}.\n */\nDirectivity.prototype.setPattern = function(alpha, sharpness) {\n // Clamp and set values.\n this._alpha = Math.min(1, Math.max(0, alpha));\n this._sharpness = Math.max(1, sharpness);\n\n // Update angle calculation using new values.\n this.computeAngle([this._cosTheta * this._cosTheta, 0, 0], [1, 0, 0]);\n};\n\n\nmodule.exports = Directivity;\n\n\n/***/ }),\n/* 6 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Distance-based attenuation filter.\n * @author Andrew Allen \n */\n\n\n\n\n// Internal dependencies.\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @class Attenuation\n * @description Distance-based attenuation filter.\n * @param {AudioContext} context\n * Associated {@link\nhttps://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext}.\n * @param {Object} options\n * @param {Number} options.minDistance\n * Min. distance (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_MIN_DISTANCE DEFAULT_MIN_DISTANCE}.\n * @param {Number} options.maxDistance\n * Max. distance (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_MAX_DISTANCE DEFAULT_MAX_DISTANCE}.\n * @param {string} options.rolloff\n * Rolloff model to use, chosen from options in\n * {@linkcode Utils.ATTENUATION_ROLLOFFS ATTENUATION_ROLLOFFS}. Defaults to\n * {@linkcode Utils.DEFAULT_ATTENUATION_ROLLOFF DEFAULT_ATTENUATION_ROLLOFF}.\n */\nfunction Attenuation(context, options) {\n // Public variables.\n /**\n * Min. distance (in meters).\n * @member {Number} minDistance\n * @memberof Attenuation\n * @instance\n */\n /**\n * Max. distance (in meters).\n * @member {Number} maxDistance\n * @memberof Attenuation\n * @instance\n */\n /**\n * Mono (1-channel) input {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} input\n * @memberof Attenuation\n * @instance\n */\n /**\n * Mono (1-channel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} output\n * @memberof Attenuation\n * @instance\n */\n\n // Use defaults for undefined arguments.\n if (options == undefined) {\n options = {};\n }\n if (options.minDistance == undefined) {\n options.minDistance = Utils.DEFAULT_MIN_DISTANCE;\n }\n if (options.maxDistance == undefined) {\n options.maxDistance = Utils.DEFAULT_MAX_DISTANCE;\n }\n if (options.rolloff == undefined) {\n options.rolloff = Utils.DEFAULT_ATTENUATION_ROLLOFF;\n }\n\n // Assign values.\n this.minDistance = options.minDistance;\n this.maxDistance = options.maxDistance;\n this.setRolloff(options.rolloff);\n\n // Create node.\n this._gainNode = context.createGain();\n\n // Initialize distance to max distance.\n this.setDistance(options.maxDistance);\n\n // Input/Output proxy.\n this.input = this._gainNode;\n this.output = this._gainNode;\n}\n\n\n/**\n * Set distance from the listener.\n * @param {Number} distance Distance (in meters).\n */\nAttenuation.prototype.setDistance = function(distance) {\n let gain = 1;\n if (this._rolloff == 'logarithmic') {\n if (distance > this.maxDistance) {\n gain = 0;\n } else if (distance > this.minDistance) {\n let range = this.maxDistance - this.minDistance;\n if (range > Utils.EPSILON_FLOAT) {\n // Compute the distance attenuation value by the logarithmic curve\n // \"1 / (d + 1)\" with an offset of |minDistance|.\n let relativeDistance = distance - this.minDistance;\n let attenuation = 1 / (relativeDistance + 1);\n let attenuationMax = 1 / (range + 1);\n gain = (attenuation - attenuationMax) / (1 - attenuationMax);\n }\n }\n } else if (this._rolloff == 'linear') {\n if (distance > this.maxDistance) {\n gain = 0;\n } else if (distance > this.minDistance) {\n let range = this.maxDistance - this.minDistance;\n if (range > Utils.EPSILON_FLOAT) {\n gain = (this.maxDistance - distance) / range;\n }\n }\n }\n this._gainNode.gain.value = gain;\n};\n\n\n/**\n * Set rolloff.\n * @param {string} rolloff\n * Rolloff model to use, chosen from options in\n * {@linkcode Utils.ATTENUATION_ROLLOFFS ATTENUATION_ROLLOFFS}.\n */\nAttenuation.prototype.setRolloff = function(rolloff) {\n let isValidModel = ~Utils.ATTENUATION_ROLLOFFS.indexOf(rolloff);\n if (rolloff == undefined || !isValidModel) {\n if (!isValidModel) {\n Utils.log('Invalid rolloff model (\\\"' + rolloff +\n '\\\"). Using default: \\\"' + Utils.DEFAULT_ATTENUATION_ROLLOFF + '\\\".');\n }\n rolloff = Utils.DEFAULT_ATTENUATION_ROLLOFF;\n } else {\n rolloff = rolloff.toString().toLowerCase();\n }\n this._rolloff = rolloff;\n};\n\n\nmodule.exports = Attenuation;\n\n\n/***/ }),\n/* 7 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Complete room model with early and late reflections.\n * @author Andrew Allen \n */\n\n\n\n\n// Internal dependencies.\nconst LateReflections = __webpack_require__(8);\nconst EarlyReflections = __webpack_require__(9);\nconst Utils = __webpack_require__(0);\n\n\n/**\n * Generate absorption coefficients from material names.\n * @param {Object} materials\n * @return {Object}\n */\nfunction _getCoefficientsFromMaterials(materials) {\n // Initialize coefficients to use defaults.\n let coefficients = {};\n for (let property in Utils.DEFAULT_ROOM_MATERIALS) {\n if (Utils.DEFAULT_ROOM_MATERIALS.hasOwnProperty(property)) {\n coefficients[property] = Utils.ROOM_MATERIAL_COEFFICIENTS[\n Utils.DEFAULT_ROOM_MATERIALS[property]];\n }\n }\n\n // Sanitize materials.\n if (materials == undefined) {\n materials = {};\n Object.assign(materials, Utils.DEFAULT_ROOM_MATERIALS);\n }\n\n // Assign coefficients using provided materials.\n for (let property in Utils.DEFAULT_ROOM_MATERIALS) {\n if (Utils.DEFAULT_ROOM_MATERIALS.hasOwnProperty(property) &&\n materials.hasOwnProperty(property)) {\n if (materials[property] in Utils.ROOM_MATERIAL_COEFFICIENTS) {\n coefficients[property] =\n Utils.ROOM_MATERIAL_COEFFICIENTS[materials[property]];\n } else {\n Utils.log('Material \\\"' + materials[property] + '\\\" on wall \\\"' +\n property + '\\\" not found. Using \\\"' +\n Utils.DEFAULT_ROOM_MATERIALS[property] + '\\\".');\n }\n } else {\n Utils.log('Wall \\\"' + property + '\\\" is not defined. Default used.');\n }\n }\n return coefficients;\n}\n\n/**\n * Sanitize coefficients.\n * @param {Object} coefficients\n * @return {Object}\n */\nfunction _sanitizeCoefficients(coefficients) {\n if (coefficients == undefined) {\n coefficients = {};\n }\n for (let property in Utils.DEFAULT_ROOM_MATERIALS) {\n if (!(coefficients.hasOwnProperty(property))) {\n // If element is not present, use default coefficients.\n coefficients[property] = Utils.ROOM_MATERIAL_COEFFICIENTS[\n Utils.DEFAULT_ROOM_MATERIALS[property]];\n }\n }\n return coefficients;\n}\n\n/**\n * Sanitize dimensions.\n * @param {Object} dimensions\n * @return {Object}\n */\nfunction _sanitizeDimensions(dimensions) {\n if (dimensions == undefined) {\n dimensions = {};\n }\n for (let property in Utils.DEFAULT_ROOM_DIMENSIONS) {\n if (!(dimensions.hasOwnProperty(property))) {\n dimensions[property] = Utils.DEFAULT_ROOM_DIMENSIONS[property];\n }\n }\n return dimensions;\n}\n\n/**\n * Compute frequency-dependent reverb durations.\n * @param {Object} dimensions\n * @param {Object} coefficients\n * @param {Number} speedOfSound\n * @return {Array}\n */\nfunction _getDurationsFromProperties(dimensions, coefficients, speedOfSound) {\n let durations = new Float32Array(Utils.NUMBER_REVERB_FREQUENCY_BANDS);\n\n // Sanitize inputs.\n dimensions = _sanitizeDimensions(dimensions);\n coefficients = _sanitizeCoefficients(coefficients);\n if (speedOfSound == undefined) {\n speedOfSound = Utils.DEFAULT_SPEED_OF_SOUND;\n }\n\n // Acoustic constant.\n let k = Utils.TWENTY_FOUR_LOG10 / speedOfSound;\n\n // Compute volume, skip if room is not present.\n let volume = dimensions.width * dimensions.height * dimensions.depth;\n if (volume < Utils.ROOM_MIN_VOLUME) {\n return durations;\n }\n\n // Room surface area.\n let leftRightArea = dimensions.width * dimensions.height;\n let floorCeilingArea = dimensions.width * dimensions.depth;\n let frontBackArea = dimensions.depth * dimensions.height;\n let totalArea = 2 * (leftRightArea + floorCeilingArea + frontBackArea);\n for (let i = 0; i < Utils.NUMBER_REVERB_FREQUENCY_BANDS; i++) {\n // Effective absorptive area.\n let absorbtionArea =\n (coefficients.left[i] + coefficients.right[i]) * leftRightArea +\n (coefficients.down[i] + coefficients.up[i]) * floorCeilingArea +\n (coefficients.front[i] + coefficients.back[i]) * frontBackArea;\n let meanAbsorbtionArea = absorbtionArea / totalArea;\n\n // Compute reverberation using Eyring equation [1].\n // [1] Beranek, Leo L. \"Analysis of Sabine and Eyring equations and their\n // application to concert hall audience and chair absorption.\" The\n // Journal of the Acoustical Society of America, Vol. 120, No. 3.\n // (2006), pp. 1399-1399.\n durations[i] = Utils.ROOM_EYRING_CORRECTION_COEFFICIENT * k * volume /\n (-totalArea * Math.log(1 - meanAbsorbtionArea) + 4 *\n Utils.ROOM_AIR_ABSORPTION_COEFFICIENTS[i] * volume);\n }\n return durations;\n}\n\n\n/**\n * Compute reflection coefficients from absorption coefficients.\n * @param {Object} absorptionCoefficients\n * @return {Object}\n */\nfunction _computeReflectionCoefficients(absorptionCoefficients) {\n let reflectionCoefficients = [];\n for (let property in Utils.DEFAULT_REFLECTION_COEFFICIENTS) {\n if (Utils.DEFAULT_REFLECTION_COEFFICIENTS\n .hasOwnProperty(property)) {\n // Compute average absorption coefficient (per wall).\n reflectionCoefficients[property] = 0;\n for (let j = 0; j < Utils.NUMBER_REFLECTION_AVERAGING_BANDS; j++) {\n let bandIndex = j + Utils.ROOM_STARTING_AVERAGING_BAND;\n reflectionCoefficients[property] +=\n absorptionCoefficients[property][bandIndex];\n }\n reflectionCoefficients[property] /=\n Utils.NUMBER_REFLECTION_AVERAGING_BANDS;\n\n // Convert absorption coefficient to reflection coefficient.\n reflectionCoefficients[property] =\n Math.sqrt(1 - reflectionCoefficients[property]);\n }\n }\n return reflectionCoefficients;\n}\n\n\n/**\n * @class Room\n * @description Model that manages early and late reflections using acoustic\n * properties and listener position relative to a rectangular room.\n * @param {AudioContext} context\n * Associated {@link\nhttps://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext}.\n * @param {Object} options\n * @param {Float32Array} options.listenerPosition\n * The listener's initial position (in meters), where origin is the center of\n * the room. Defaults to {@linkcode Utils.DEFAULT_POSITION DEFAULT_POSITION}.\n * @param {Object} options.dimensions Room dimensions (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_ROOM_DIMENSIONS DEFAULT_ROOM_DIMENSIONS}.\n * @param {Object} options.materials Named acoustic materials per wall.\n * Defaults to {@linkcode Utils.DEFAULT_ROOM_MATERIALS DEFAULT_ROOM_MATERIALS}.\n * @param {Number} options.speedOfSound\n * (in meters/second). Defaults to\n * {@linkcode Utils.DEFAULT_SPEED_OF_SOUND DEFAULT_SPEED_OF_SOUND}.\n */\nfunction Room(context, options) {\n // Public variables.\n /**\n * EarlyReflections {@link EarlyReflections EarlyReflections} submodule.\n * @member {AudioNode} early\n * @memberof Room\n * @instance\n */\n /**\n * LateReflections {@link LateReflections LateReflections} submodule.\n * @member {AudioNode} late\n * @memberof Room\n * @instance\n */\n /**\n * Ambisonic (multichannel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} output\n * @memberof Room\n * @instance\n */\n\n // Use defaults for undefined arguments.\n if (options == undefined) {\n options = {};\n }\n if (options.listenerPosition == undefined) {\n options.listenerPosition = Utils.DEFAULT_POSITION.slice();\n }\n if (options.dimensions == undefined) {\n options.dimensions = {};\n Object.assign(options.dimensions, Utils.DEFAULT_ROOM_DIMENSIONS);\n }\n if (options.materials == undefined) {\n options.materials = {};\n Object.assign(options.materials, Utils.DEFAULT_ROOM_MATERIALS);\n }\n if (options.speedOfSound == undefined) {\n options.speedOfSound = Utils.DEFAULT_SPEED_OF_SOUND;\n }\n\n // Sanitize room-properties-related arguments.\n options.dimensions = _sanitizeDimensions(options.dimensions);\n let absorptionCoefficients = _getCoefficientsFromMaterials(options.materials);\n let reflectionCoefficients =\n _computeReflectionCoefficients(absorptionCoefficients);\n let durations = _getDurationsFromProperties(options.dimensions,\n absorptionCoefficients, options.speedOfSound);\n\n // Construct submodules for early and late reflections.\n this.early = new EarlyReflections(context, {\n dimensions: options.dimensions,\n coefficients: reflectionCoefficients,\n speedOfSound: options.speedOfSound,\n listenerPosition: options.listenerPosition,\n });\n this.late = new LateReflections(context, {\n durations: durations,\n });\n\n this.speedOfSound = options.speedOfSound;\n\n // Construct auxillary audio nodes.\n this.output = context.createGain();\n this.early.output.connect(this.output);\n this._merger = context.createChannelMerger(4);\n\n this.late.output.connect(this._merger, 0, 0);\n this._merger.connect(this.output);\n}\n\n\n/**\n * Set the room's dimensions and wall materials.\n * @param {Object} dimensions Room dimensions (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_ROOM_DIMENSIONS DEFAULT_ROOM_DIMENSIONS}.\n * @param {Object} materials Named acoustic materials per wall. Defaults to\n * {@linkcode Utils.DEFAULT_ROOM_MATERIALS DEFAULT_ROOM_MATERIALS}.\n */\nRoom.prototype.setProperties = function(dimensions, materials) {\n // Compute late response.\n let absorptionCoefficients = _getCoefficientsFromMaterials(materials);\n let durations = _getDurationsFromProperties(dimensions,\n absorptionCoefficients, this.speedOfSound);\n this.late.setDurations(durations);\n\n // Compute early response.\n this.early.speedOfSound = this.speedOfSound;\n let reflectionCoefficients =\n _computeReflectionCoefficients(absorptionCoefficients);\n this.early.setRoomProperties(dimensions, reflectionCoefficients);\n};\n\n\n/**\n * Set the listener's position (in meters), where origin is the center of\n * the room.\n * @param {Number} x\n * @param {Number} y\n * @param {Number} z\n */\nRoom.prototype.setListenerPosition = function(x, y, z) {\n this.early.speedOfSound = this.speedOfSound;\n this.early.setListenerPosition(x, y, z);\n\n // Disable room effects if the listener is outside the room boundaries.\n let distance = this.getDistanceOutsideRoom(x, y, z);\n let gain = 1;\n if (distance > Utils.EPSILON_FLOAT) {\n gain = 1 - distance / Utils.LISTENER_MAX_OUTSIDE_ROOM_DISTANCE;\n\n // Clamp gain between 0 and 1.\n gain = Math.max(0, Math.min(1, gain));\n }\n this.output.gain.value = gain;\n};\n\n\n/**\n * Compute distance outside room of provided position (in meters).\n * @param {Number} x\n * @param {Number} y\n * @param {Number} z\n * @return {Number}\n * Distance outside room (in meters). Returns 0 if inside room.\n */\nRoom.prototype.getDistanceOutsideRoom = function(x, y, z) {\n let dx = Math.max(0, -this.early._halfDimensions.width - x,\n x - this.early._halfDimensions.width);\n let dy = Math.max(0, -this.early._halfDimensions.height - y,\n y - this.early._halfDimensions.height);\n let dz = Math.max(0, -this.early._halfDimensions.depth - z,\n z - this.early._halfDimensions.depth);\n return Math.sqrt(dx * dx + dy * dy + dz * dz);\n};\n\n\nmodule.exports = Room;\n\n\n/***/ }),\n/* 8 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Late reverberation filter for Ambisonic content.\n * @author Andrew Allen \n */\n\n\n\n// Internal dependencies.\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @class LateReflections\n * @description Late-reflections reverberation filter for Ambisonic content.\n * @param {AudioContext} context\n * Associated {@link\nhttps://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext}.\n * @param {Object} options\n * @param {Array} options.durations\n * Multiband RT60 durations (in seconds) for each frequency band, listed as\n * {@linkcode Utils.DEFAULT_REVERB_FREQUENCY_BANDS\n * FREQUDEFAULT_REVERB_FREQUENCY_BANDSENCY_BANDS}. Defaults to\n * {@linkcode Utils.DEFAULT_REVERB_DURATIONS DEFAULT_REVERB_DURATIONS}.\n * @param {Number} options.predelay Pre-delay (in milliseconds). Defaults to\n * {@linkcode Utils.DEFAULT_REVERB_PREDELAY DEFAULT_REVERB_PREDELAY}.\n * @param {Number} options.gain Output gain (linear). Defaults to\n * {@linkcode Utils.DEFAULT_REVERB_GAIN DEFAULT_REVERB_GAIN}.\n * @param {Number} options.bandwidth Bandwidth (in octaves) for each frequency\n * band. Defaults to\n * {@linkcode Utils.DEFAULT_REVERB_BANDWIDTH DEFAULT_REVERB_BANDWIDTH}.\n * @param {Number} options.tailonset Length (in milliseconds) of impulse\n * response to apply a half-Hann window. Defaults to\n * {@linkcode Utils.DEFAULT_REVERB_TAIL_ONSET DEFAULT_REVERB_TAIL_ONSET}.\n */\nfunction LateReflections(context, options) {\n // Public variables.\n /**\n * Mono (1-channel) input {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} input\n * @memberof LateReflections\n * @instance\n */\n /**\n * Mono (1-channel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} output\n * @memberof LateReflections\n * @instance\n */\n\n // Use defaults for undefined arguments.\n if (options == undefined) {\n options = {};\n }\n if (options.durations == undefined) {\n options.durations = Utils.DEFAULT_REVERB_DURATIONS.slice();\n }\n if (options.predelay == undefined) {\n options.predelay = Utils.DEFAULT_REVERB_PREDELAY;\n }\n if (options.gain == undefined) {\n options.gain = Utils.DEFAULT_REVERB_GAIN;\n }\n if (options.bandwidth == undefined) {\n options.bandwidth = Utils.DEFAULT_REVERB_BANDWIDTH;\n }\n if (options.tailonset == undefined) {\n options.tailonset = Utils.DEFAULT_REVERB_TAIL_ONSET;\n }\n\n // Assign pre-computed variables.\n let delaySecs = options.predelay / 1000;\n this._bandwidthCoeff = options.bandwidth * Utils.LOG2_DIV2;\n this._tailonsetSamples = options.tailonset / 1000;\n\n // Create nodes.\n this._context = context;\n this.input = context.createGain();\n this._predelay = context.createDelay(delaySecs);\n this._convolver = context.createConvolver();\n this.output = context.createGain();\n\n // Set reverb attenuation.\n this.output.gain.value = options.gain;\n\n // Disable normalization.\n this._convolver.normalize = false;\n\n // Connect nodes.\n this.input.connect(this._predelay);\n this._predelay.connect(this._convolver);\n this._convolver.connect(this.output);\n\n // Compute IR using RT60 values.\n this.setDurations(options.durations);\n}\n\n\n/**\n * Re-compute a new impulse response by providing Multiband RT60 durations.\n * @param {Array} durations\n * Multiband RT60 durations (in seconds) for each frequency band, listed as\n * {@linkcode Utils.DEFAULT_REVERB_FREQUENCY_BANDS\n * DEFAULT_REVERB_FREQUENCY_BANDS}.\n */\nLateReflections.prototype.setDurations = function(durations) {\n if (durations.length !== Utils.NUMBER_REVERB_FREQUENCY_BANDS) {\n Utils.log('Warning: invalid number of RT60 values provided to reverb.');\n return;\n }\n\n // Compute impulse response.\n let durationsSamples =\n new Float32Array(Utils.NUMBER_REVERB_FREQUENCY_BANDS);\n let sampleRate = this._context.sampleRate;\n\n for (let i = 0; i < durations.length; i++) {\n // Clamp within suitable range.\n durations[i] =\n Math.max(0, Math.min(Utils.DEFAULT_REVERB_MAX_DURATION, durations[i]));\n\n // Convert seconds to samples.\n durationsSamples[i] = Math.round(durations[i] * sampleRate *\n Utils.DEFAULT_REVERB_DURATION_MULTIPLIER);\n };\n\n // Determine max RT60 length in samples.\n let durationsSamplesMax = 0;\n for (let i = 0; i < durationsSamples.length; i++) {\n if (durationsSamples[i] > durationsSamplesMax) {\n durationsSamplesMax = durationsSamples[i];\n }\n }\n\n // Skip this step if there is no reverberation to compute.\n if (durationsSamplesMax < 1) {\n durationsSamplesMax = 1;\n }\n\n // Create impulse response buffer.\n let buffer = this._context.createBuffer(1, durationsSamplesMax, sampleRate);\n let bufferData = buffer.getChannelData(0);\n\n // Create noise signal (computed once, referenced in each band's routine).\n let noiseSignal = new Float32Array(durationsSamplesMax);\n for (let i = 0; i < durationsSamplesMax; i++) {\n noiseSignal[i] = Math.random() * 2 - 1;\n }\n\n // Compute the decay rate per-band and filter the decaying noise signal.\n for (let i = 0; i < Utils.NUMBER_REVERB_FREQUENCY_BANDS; i++) {\n // Compute decay rate.\n let decayRate = -Utils.LOG1000 / durationsSamples[i];\n\n // Construct a standard one-zero, two-pole bandpass filter:\n // H(z) = (b0 * z^0 + b1 * z^-1 + b2 * z^-2) / (1 + a1 * z^-1 + a2 * z^-2)\n let omega = Utils.TWO_PI *\n Utils.DEFAULT_REVERB_FREQUENCY_BANDS[i] / sampleRate;\n let sinOmega = Math.sin(omega);\n let alpha = sinOmega * Math.sinh(this._bandwidthCoeff * omega / sinOmega);\n let a0CoeffReciprocal = 1 / (1 + alpha);\n let b0Coeff = alpha * a0CoeffReciprocal;\n let a1Coeff = -2 * Math.cos(omega) * a0CoeffReciprocal;\n let a2Coeff = (1 - alpha) * a0CoeffReciprocal;\n\n // We optimize since b2 = -b0, b1 = 0.\n // Update equation for two-pole bandpass filter:\n // u[n] = x[n] - a1 * x[n-1] - a2 * x[n-2]\n // y[n] = b0 * (u[n] - u[n-2])\n let um1 = 0;\n let um2 = 0;\n for (let j = 0; j < durationsSamples[i]; j++) {\n // Exponentially-decaying white noise.\n let x = noiseSignal[j] * Math.exp(decayRate * j);\n\n // Filter signal with bandpass filter and add to output.\n let u = x - a1Coeff * um1 - a2Coeff * um2;\n bufferData[j] += b0Coeff * (u - um2);\n\n // Update coefficients.\n um2 = um1;\n um1 = u;\n }\n }\n\n // Create and apply half of a Hann window to the beginning of the\n // impulse response.\n let halfHannLength =\n Math.round(this._tailonsetSamples);\n for (let i = 0; i < Math.min(bufferData.length, halfHannLength); i++) {\n let halfHann =\n 0.5 * (1 - Math.cos(Utils.TWO_PI * i / (2 * halfHannLength - 1)));\n bufferData[i] *= halfHann;\n }\n this._convolver.buffer = buffer;\n};\n\n\nmodule.exports = LateReflections;\n\n\n/***/ }),\n/* 9 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Ray-tracing-based early reflections model.\n * @author Andrew Allen \n */\n\n\n\n// Internal dependencies.\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @class EarlyReflections\n * @description Ray-tracing-based early reflections model.\n * @param {AudioContext} context\n * Associated {@link\nhttps://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext}.\n * @param {Object} options\n * @param {Object} options.dimensions\n * Room dimensions (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_ROOM_DIMENSIONS DEFAULT_ROOM_DIMENSIONS}.\n * @param {Object} options.coefficients\n * Frequency-independent reflection coeffs per wall. Defaults to\n * {@linkcode Utils.DEFAULT_REFLECTION_COEFFICIENTS\n * DEFAULT_REFLECTION_COEFFICIENTS}.\n * @param {Number} options.speedOfSound\n * (in meters / second). Defaults to {@linkcode Utils.DEFAULT_SPEED_OF_SOUND\n * DEFAULT_SPEED_OF_SOUND}.\n * @param {Float32Array} options.listenerPosition\n * (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_POSITION DEFAULT_POSITION}.\n */\nfunction EarlyReflections(context, options) {\n // Public variables.\n /**\n * The room's speed of sound (in meters/second).\n * @member {Number} speedOfSound\n * @memberof EarlyReflections\n * @instance\n */\n /**\n * Mono (1-channel) input {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} input\n * @memberof EarlyReflections\n * @instance\n */\n /**\n * First-order ambisonic (4-channel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} output\n * @memberof EarlyReflections\n * @instance\n */\n\n // Use defaults for undefined arguments.\n if (options == undefined) {\n options = {};\n }\n if (options.speedOfSound == undefined) {\n options.speedOfSound = Utils.DEFAULT_SPEED_OF_SOUND;\n }\n if (options.listenerPosition == undefined) {\n options.listenerPosition = Utils.DEFAULT_POSITION.slice();\n }\n if (options.coefficients == undefined) {\n options.coefficients = {};\n Object.assign(options.coefficients, Utils.DEFAULT_REFLECTION_COEFFICIENTS);\n }\n\n // Assign room's speed of sound.\n this.speedOfSound = options.speedOfSound;\n\n // Create nodes.\n this.input = context.createGain();\n this.output = context.createGain();\n this._lowpass = context.createBiquadFilter();\n this._delays = {};\n this._gains = {}; // gainPerWall = (ReflectionCoeff / Attenuation)\n this._inverters = {}; // 3 of these are needed for right/back/down walls.\n this._merger = context.createChannelMerger(4); // First-order encoding only.\n\n // Connect audio graph for each wall reflection.\n for (let property in Utils.DEFAULT_REFLECTION_COEFFICIENTS) {\n if (Utils.DEFAULT_REFLECTION_COEFFICIENTS\n .hasOwnProperty(property)) {\n this._delays[property] =\n context.createDelay(Utils.MAX_DURATION);\n this._gains[property] = context.createGain();\n }\n }\n this._inverters.right = context.createGain();\n this._inverters.down = context.createGain();\n this._inverters.back = context.createGain();\n\n // Initialize lowpass filter.\n this._lowpass.type = 'lowpass';\n this._lowpass.frequency.value = Utils.DEFAULT_REFLECTION_CUTOFF_FREQUENCY;\n this._lowpass.Q.value = 0;\n\n // Initialize encoder directions, set delay times and gains to 0.\n for (let property in Utils.DEFAULT_REFLECTION_COEFFICIENTS) {\n if (Utils.DEFAULT_REFLECTION_COEFFICIENTS\n .hasOwnProperty(property)) {\n this._delays[property].delayTime.value = 0;\n this._gains[property].gain.value = 0;\n }\n }\n\n // Initialize inverters for opposite walls ('right', 'down', 'back' only).\n this._inverters.right.gain.value = -1;\n this._inverters.down.gain.value = -1;\n this._inverters.back.gain.value = -1;\n\n // Connect nodes.\n this.input.connect(this._lowpass);\n for (let property in Utils.DEFAULT_REFLECTION_COEFFICIENTS) {\n if (Utils.DEFAULT_REFLECTION_COEFFICIENTS\n .hasOwnProperty(property)) {\n this._lowpass.connect(this._delays[property]);\n this._delays[property].connect(this._gains[property]);\n this._gains[property].connect(this._merger, 0, 0);\n }\n }\n\n // Connect gains to ambisonic channel output.\n // Left: [1 1 0 0]\n // Right: [1 -1 0 0]\n // Up: [1 0 1 0]\n // Down: [1 0 -1 0]\n // Front: [1 0 0 1]\n // Back: [1 0 0 -1]\n this._gains.left.connect(this._merger, 0, 1);\n\n this._gains.right.connect(this._inverters.right);\n this._inverters.right.connect(this._merger, 0, 1);\n\n this._gains.up.connect(this._merger, 0, 2);\n\n this._gains.down.connect(this._inverters.down);\n this._inverters.down.connect(this._merger, 0, 2);\n\n this._gains.front.connect(this._merger, 0, 3);\n\n this._gains.back.connect(this._inverters.back);\n this._inverters.back.connect(this._merger, 0, 3);\n this._merger.connect(this.output);\n\n // Initialize.\n this._listenerPosition = options.listenerPosition;\n this.setRoomProperties(options.dimensions, options.coefficients);\n}\n\n\n/**\n * Set the listener's position (in meters),\n * where [0,0,0] is the center of the room.\n * @param {Number} x\n * @param {Number} y\n * @param {Number} z\n */\nEarlyReflections.prototype.setListenerPosition = function(x, y, z) {\n // Assign listener position.\n this._listenerPosition = [x, y, z];\n\n // Determine distances to each wall.\n let distances = {\n left: Utils.DEFAULT_REFLECTION_MULTIPLIER * Math.max(0,\n this._halfDimensions.width + x) + Utils.DEFAULT_REFLECTION_MIN_DISTANCE,\n right: Utils.DEFAULT_REFLECTION_MULTIPLIER * Math.max(0,\n this._halfDimensions.width - x) + Utils.DEFAULT_REFLECTION_MIN_DISTANCE,\n front: Utils.DEFAULT_REFLECTION_MULTIPLIER * Math.max(0,\n this._halfDimensions.depth + z) + Utils.DEFAULT_REFLECTION_MIN_DISTANCE,\n back: Utils.DEFAULT_REFLECTION_MULTIPLIER * Math.max(0,\n this._halfDimensions.depth - z) + Utils.DEFAULT_REFLECTION_MIN_DISTANCE,\n down: Utils.DEFAULT_REFLECTION_MULTIPLIER * Math.max(0,\n this._halfDimensions.height + y) + Utils.DEFAULT_REFLECTION_MIN_DISTANCE,\n up: Utils.DEFAULT_REFLECTION_MULTIPLIER * Math.max(0,\n this._halfDimensions.height - y) + Utils.DEFAULT_REFLECTION_MIN_DISTANCE,\n };\n\n // Assign delay & attenuation values using distances.\n for (let property in Utils.DEFAULT_REFLECTION_COEFFICIENTS) {\n if (Utils.DEFAULT_REFLECTION_COEFFICIENTS\n .hasOwnProperty(property)) {\n // Compute and assign delay (in seconds).\n let delayInSecs = distances[property] / this.speedOfSound;\n this._delays[property].delayTime.value = delayInSecs;\n\n // Compute and assign gain, uses logarithmic rolloff: \"g = R / (d + 1)\"\n let attenuation = this._coefficients[property] / distances[property];\n this._gains[property].gain.value = attenuation;\n }\n }\n};\n\n\n/**\n * Set the room's properties which determines the characteristics of\n * reflections.\n * @param {Object} dimensions\n * Room dimensions (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_ROOM_DIMENSIONS DEFAULT_ROOM_DIMENSIONS}.\n * @param {Object} coefficients\n * Frequency-independent reflection coeffs per wall. Defaults to\n * {@linkcode Utils.DEFAULT_REFLECTION_COEFFICIENTS\n * DEFAULT_REFLECTION_COEFFICIENTS}.\n */\nEarlyReflections.prototype.setRoomProperties = function(dimensions,\n coefficients) {\n if (dimensions == undefined) {\n dimensions = {};\n Object.assign(dimensions, Utils.DEFAULT_ROOM_DIMENSIONS);\n }\n if (coefficients == undefined) {\n coefficients = {};\n Object.assign(coefficients, Utils.DEFAULT_REFLECTION_COEFFICIENTS);\n }\n this._coefficients = coefficients;\n\n // Sanitize dimensions and store half-dimensions.\n this._halfDimensions = {};\n this._halfDimensions.width = dimensions.width * 0.5;\n this._halfDimensions.height = dimensions.height * 0.5;\n this._halfDimensions.depth = dimensions.depth * 0.5;\n\n // Update listener position with new room properties.\n this.setListenerPosition(this._listenerPosition[0],\n this._listenerPosition[1], this._listenerPosition[2]);\n};\n\n\nmodule.exports = EarlyReflections;\n\n\n/***/ }),\n/* 10 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Primary namespace for ResonanceAudio library.\n * @author Andrew Allen \n */\n\n \n\n\n// Main module.\nexports.ResonanceAudio = __webpack_require__(11);\n\n\n// Testable Submodules.\nexports.ResonanceAudio.Attenuation = __webpack_require__(6);\nexports.ResonanceAudio.Directivity = __webpack_require__(5);\nexports.ResonanceAudio.EarlyReflections = __webpack_require__(9);\nexports.ResonanceAudio.Encoder = __webpack_require__(1);\nexports.ResonanceAudio.LateReflections = __webpack_require__(8);\nexports.ResonanceAudio.Listener = __webpack_require__(2);\nexports.ResonanceAudio.Room = __webpack_require__(7);\nexports.ResonanceAudio.Source = __webpack_require__(4);\nexports.ResonanceAudio.Tables = __webpack_require__(3);\nexports.ResonanceAudio.Utils = __webpack_require__(0);\nexports.ResonanceAudio.Version = __webpack_require__(13);\n\n\n/***/ }),\n/* 11 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file ResonanceAudio library name space and common utilities.\n * @author Andrew Allen \n */\n\n\n\n\n// Internal dependencies.\nconst Listener = __webpack_require__(2);\nconst Source = __webpack_require__(4);\nconst Room = __webpack_require__(7);\nconst Encoder = __webpack_require__(1);\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @class ResonanceAudio\n * @description Main class for managing sources, room and listener models.\n * @param {AudioContext} context\n * Associated {@link\nhttps://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext}.\n * @param {Object} options\n * @param {Number} options.ambisonicOrder\n * Desired ambisonic Order. Defaults to\n * {@linkcode Utils.DEFAULT_AMBISONIC_ORDER DEFAULT_AMBISONIC_ORDER}.\n * @param {Float32Array} options.listenerPosition\n * The listener's initial position (in meters), where origin is the center of\n * the room. Defaults to {@linkcode Utils.DEFAULT_POSITION DEFAULT_POSITION}.\n * @param {Float32Array} options.listenerForward\n * The listener's initial forward vector.\n * Defaults to {@linkcode Utils.DEFAULT_FORWARD DEFAULT_FORWARD}.\n * @param {Float32Array} options.listenerUp\n * The listener's initial up vector.\n * Defaults to {@linkcode Utils.DEFAULT_UP DEFAULT_UP}.\n * @param {Object} options.dimensions Room dimensions (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_ROOM_DIMENSIONS DEFAULT_ROOM_DIMENSIONS}.\n * @param {Object} options.materials Named acoustic materials per wall.\n * Defaults to {@linkcode Utils.DEFAULT_ROOM_MATERIALS DEFAULT_ROOM_MATERIALS}.\n * @param {Number} options.speedOfSound\n * (in meters/second). Defaults to\n * {@linkcode Utils.DEFAULT_SPEED_OF_SOUND DEFAULT_SPEED_OF_SOUND}.\n */\nfunction ResonanceAudio(context, options) {\n // Public variables.\n /**\n * Binaurally-rendered stereo (2-channel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}.\n * @member {AudioNode} output\n * @memberof ResonanceAudio\n * @instance\n */\n /**\n * Ambisonic (multichannel) input {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}\n * (For rendering input soundfields).\n * @member {AudioNode} ambisonicInput\n * @memberof ResonanceAudio\n * @instance\n */\n /**\n * Ambisonic (multichannel) output {@link\n * https://developer.mozilla.org/en-US/docs/Web/API/AudioNode AudioNode}\n * (For allowing external rendering / post-processing).\n * @member {AudioNode} ambisonicOutput\n * @memberof ResonanceAudio\n * @instance\n */\n\n // Use defaults for undefined arguments.\n if (options == undefined) {\n options = {};\n }\n if (options.ambisonicOrder == undefined) {\n options.ambisonicOrder = Utils.DEFAULT_AMBISONIC_ORDER;\n }\n if (options.listenerPosition == undefined) {\n options.listenerPosition = Utils.DEFAULT_POSITION.slice();\n }\n if (options.listenerForward == undefined) {\n options.listenerForward = Utils.DEFAULT_FORWARD.slice();\n }\n if (options.listenerUp == undefined) {\n options.listenerUp = Utils.DEFAULT_UP.slice();\n }\n if (options.dimensions == undefined) {\n options.dimensions = {};\n Object.assign(options.dimensions, Utils.DEFAULT_ROOM_DIMENSIONS);\n }\n if (options.materials == undefined) {\n options.materials = {};\n Object.assign(options.materials, Utils.DEFAULT_ROOM_MATERIALS);\n }\n if (options.speedOfSound == undefined) {\n options.speedOfSound = Utils.DEFAULT_SPEED_OF_SOUND;\n }\n\n // Create member submodules.\n this._ambisonicOrder = Encoder.validateAmbisonicOrder(options.ambisonicOrder);\n this._sources = [];\n this._room = new Room(context, {\n listenerPosition: options.listenerPosition,\n dimensions: options.dimensions,\n materials: options.materials,\n speedOfSound: options.speedOfSound,\n });\n this._listener = new Listener(context, {\n ambisonicOrder: options.ambisonicOrder,\n position: options.listenerPosition,\n forward: options.listenerForward,\n up: options.listenerUp,\n });\n\n // Create auxillary audio nodes.\n this._context = context;\n this.output = context.createGain();\n this.ambisonicOutput = context.createGain();\n this.ambisonicInput = this._listener.input;\n\n // Connect audio graph.\n this._room.output.connect(this._listener.input);\n this._listener.output.connect(this.output);\n this._listener.ambisonicOutput.connect(this.ambisonicOutput);\n}\n\n\n/**\n * Create a new source for the scene.\n * @param {Object} options\n * @param {Float32Array} options.position\n * The source's initial position (in meters), where origin is the center of\n * the room. Defaults to {@linkcode Utils.DEFAULT_POSITION DEFAULT_POSITION}.\n * @param {Float32Array} options.forward\n * The source's initial forward vector. Defaults to\n * {@linkcode Utils.DEFAULT_FORWARD DEFAULT_FORWARD}.\n * @param {Float32Array} options.up\n * The source's initial up vector. Defaults to\n * {@linkcode Utils.DEFAULT_UP DEFAULT_UP}.\n * @param {Number} options.minDistance\n * Min. distance (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_MIN_DISTANCE DEFAULT_MIN_DISTANCE}.\n * @param {Number} options.maxDistance\n * Max. distance (in meters). Defaults to\n * {@linkcode Utils.DEFAULT_MAX_DISTANCE DEFAULT_MAX_DISTANCE}.\n * @param {string} options.rolloff\n * Rolloff model to use, chosen from options in\n * {@linkcode Utils.ATTENUATION_ROLLOFFS ATTENUATION_ROLLOFFS}. Defaults to\n * {@linkcode Utils.DEFAULT_ATTENUATION_ROLLOFF DEFAULT_ATTENUATION_ROLLOFF}.\n * @param {Number} options.gain Input gain (linear). Defaults to\n * {@linkcode Utils.DEFAULT_SOURCE_GAIN DEFAULT_SOURCE_GAIN}.\n * @param {Number} options.alpha Directivity alpha. Defaults to\n * {@linkcode Utils.DEFAULT_DIRECTIVITY_ALPHA DEFAULT_DIRECTIVITY_ALPHA}.\n * @param {Number} options.sharpness Directivity sharpness. Defaults to\n * {@linkcode Utils.DEFAULT_DIRECTIVITY_SHARPNESS\n * DEFAULT_DIRECTIVITY_SHARPNESS}.\n * @param {Number} options.sourceWidth\n * Source width (in degrees). Where 0 degrees is a point source and 360 degrees\n * is an omnidirectional source. Defaults to\n * {@linkcode Utils.DEFAULT_SOURCE_WIDTH DEFAULT_SOURCE_WIDTH}.\n * @return {Source}\n */\nResonanceAudio.prototype.createSource = function(options) {\n // Create a source and push it to the internal sources array, returning\n // the object's reference to the user.\n let source = new Source(this, options);\n this._sources[this._sources.length] = source;\n return source;\n};\n\n\n/**\n * Set the scene's desired ambisonic order.\n * @param {Number} ambisonicOrder Desired ambisonic order.\n */\nResonanceAudio.prototype.setAmbisonicOrder = function(ambisonicOrder) {\n this._ambisonicOrder = Encoder.validateAmbisonicOrder(ambisonicOrder);\n};\n\n\n/**\n * Set the room's dimensions and wall materials.\n * @param {Object} dimensions Room dimensions (in meters).\n * @param {Object} materials Named acoustic materials per wall.\n */\nResonanceAudio.prototype.setRoomProperties = function(dimensions, materials) {\n this._room.setProperties(dimensions, materials);\n};\n\n\n/**\n * Set the listener's position (in meters), where origin is the center of\n * the room.\n * @param {Number} x\n * @param {Number} y\n * @param {Number} z\n */\nResonanceAudio.prototype.setListenerPosition = function(x, y, z) {\n // Update listener position.\n this._listener.position[0] = x;\n this._listener.position[1] = y;\n this._listener.position[2] = z;\n this._room.setListenerPosition(x, y, z);\n\n // Update sources with new listener position.\n this._sources.forEach(function(element) {\n element._update();\n });\n};\n\n\n/**\n * Set the source's orientation using forward and up vectors.\n * @param {Number} forwardX\n * @param {Number} forwardY\n * @param {Number} forwardZ\n * @param {Number} upX\n * @param {Number} upY\n * @param {Number} upZ\n */\nResonanceAudio.prototype.setListenerOrientation = function(forwardX, forwardY,\n forwardZ, upX, upY, upZ) {\n this._listener.setOrientation(forwardX, forwardY, forwardZ, upX, upY, upZ);\n};\n\n\n/**\n * Set the listener's position and orientation using a Three.js Matrix4 object.\n * @param {Object} matrix\n * The Three.js Matrix4 object representing the listener's world transform.\n */\nResonanceAudio.prototype.setListenerFromMatrix = function(matrix) {\n this._listener.setFromMatrix(matrix);\n\n // Update the rest of the scene using new listener position.\n this.setListenerPosition(this._listener.position[0],\n this._listener.position[1], this._listener.position[2]);\n};\n\n\n/**\n * Set the speed of sound.\n * @param {Number} speedOfSound\n */\nResonanceAudio.prototype.setSpeedOfSound = function(speedOfSound) {\n this._room.speedOfSound = speedOfSound;\n};\n\n\nmodule.exports = ResonanceAudio;\n\n\n/***/ }),\n/* 12 */\n/***/ (function(module, exports, __webpack_require__) {\n\n(function webpackUniversalModuleDefinition(root, factory) {\n\tif(true)\n\t\tmodule.exports = factory();\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine([], factory);\n\telse {\n\t\tvar a = factory();\n\t\tfor(var i in a) (typeof exports === 'object' ? exports : root)[i] = a[i];\n\t}\n})(this, function() {\nreturn /******/ (function(modules) { // webpackBootstrap\n/******/ \t// The module cache\n/******/ \tvar installedModules = {};\n/******/\n/******/ \t// The require function\n/******/ \tfunction __webpack_require__(moduleId) {\n/******/\n/******/ \t\t// Check if module is in cache\n/******/ \t\tif(installedModules[moduleId]) {\n/******/ \t\t\treturn installedModules[moduleId].exports;\n/******/ \t\t}\n/******/ \t\t// Create a new module (and put it into the cache)\n/******/ \t\tvar module = installedModules[moduleId] = {\n/******/ \t\t\ti: moduleId,\n/******/ \t\t\tl: false,\n/******/ \t\t\texports: {}\n/******/ \t\t};\n/******/\n/******/ \t\t// Execute the module function\n/******/ \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n/******/\n/******/ \t\t// Flag the module as loaded\n/******/ \t\tmodule.l = true;\n/******/\n/******/ \t\t// Return the exports of the module\n/******/ \t\treturn module.exports;\n/******/ \t}\n/******/\n/******/\n/******/ \t// expose the modules object (__webpack_modules__)\n/******/ \t__webpack_require__.m = modules;\n/******/\n/******/ \t// expose the module cache\n/******/ \t__webpack_require__.c = installedModules;\n/******/\n/******/ \t// define getter function for harmony exports\n/******/ \t__webpack_require__.d = function(exports, name, getter) {\n/******/ \t\tif(!__webpack_require__.o(exports, name)) {\n/******/ \t\t\tObject.defineProperty(exports, name, {\n/******/ \t\t\t\tconfigurable: false,\n/******/ \t\t\t\tenumerable: true,\n/******/ \t\t\t\tget: getter\n/******/ \t\t\t});\n/******/ \t\t}\n/******/ \t};\n/******/\n/******/ \t// getDefaultExport function for compatibility with non-harmony modules\n/******/ \t__webpack_require__.n = function(module) {\n/******/ \t\tvar getter = module && module.__esModule ?\n/******/ \t\t\tfunction getDefault() { return module['default']; } :\n/******/ \t\t\tfunction getModuleExports() { return module; };\n/******/ \t\t__webpack_require__.d(getter, 'a', getter);\n/******/ \t\treturn getter;\n/******/ \t};\n/******/\n/******/ \t// Object.prototype.hasOwnProperty.call\n/******/ \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n/******/\n/******/ \t// __webpack_public_path__\n/******/ \t__webpack_require__.p = \"\";\n/******/\n/******/ \t// Load entry module and return exports\n/******/ \treturn __webpack_require__(__webpack_require__.s = 10);\n/******/ })\n/************************************************************************/\n/******/ ([\n/* 0 */\n/***/ (function(module, exports) {\n\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Omnitone library common utilities.\n */\n\n\n/**\n * Omnitone library logging function.\n * @param {any} Message to be printed out.\n */\nexports.log = function() {\n window.console.log.apply(window.console, [\n '%c[Omnitone]%c ' + Array.prototype.slice.call(arguments).join(' ') +\n ' %c(@' + performance.now().toFixed(2) + 'ms)',\n 'background: #BBDEFB; color: #FF5722; font-weight: 500', 'font-weight: 300',\n 'color: #AAA',\n ]);\n};\n\n\n/**\n * Omnitone library error-throwing function.\n * @param {any} Message to be printed out.\n */\nexports.throw = function() {\n window.console.error.apply(window.console, [\n '%c[Omnitone]%c ' + Array.prototype.slice.call(arguments).join(' ') +\n ' %c(@' + performance.now().toFixed(2) + 'ms)',\n 'background: #C62828; color: #FFEBEE; font-weight: 800', 'font-weight: 400',\n 'color: #AAA',\n ]);\n\n throw new Error(false);\n};\n\n\n// Static temp storage for matrix inversion.\nlet a00;\nlet a01;\nlet a02;\nlet a03;\nlet a10;\nlet a11;\nlet a12;\nlet a13;\nlet a20;\nlet a21;\nlet a22;\nlet a23;\nlet a30;\nlet a31;\nlet a32;\nlet a33;\nlet b00;\nlet b01;\nlet b02;\nlet b03;\nlet b04;\nlet b05;\nlet b06;\nlet b07;\nlet b08;\nlet b09;\nlet b10;\nlet b11;\nlet det;\n\n\n/**\n * A 4x4 matrix inversion utility. This does not handle the case when the\n * arguments are not proper 4x4 matrices.\n * @param {Float32Array} out The inverted result.\n * @param {Float32Array} a The source matrix.\n * @return {Float32Array} out\n */\nexports.invertMatrix4 = function(out, a) {\n a00 = a[0];\n a01 = a[1];\n a02 = a[2];\n a03 = a[3];\n a10 = a[4];\n a11 = a[5];\n a12 = a[6];\n a13 = a[7];\n a20 = a[8];\n a21 = a[9];\n a22 = a[10];\n a23 = a[11];\n a30 = a[12];\n a31 = a[13];\n a32 = a[14];\n a33 = a[15];\n b00 = a00 * a11 - a01 * a10;\n b01 = a00 * a12 - a02 * a10;\n b02 = a00 * a13 - a03 * a10;\n b03 = a01 * a12 - a02 * a11;\n b04 = a01 * a13 - a03 * a11;\n b05 = a02 * a13 - a03 * a12;\n b06 = a20 * a31 - a21 * a30;\n b07 = a20 * a32 - a22 * a30;\n b08 = a20 * a33 - a23 * a30;\n b09 = a21 * a32 - a22 * a31;\n b10 = a21 * a33 - a23 * a31;\n b11 = a22 * a33 - a23 * a32;\n det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;\n\n if (!det) {\n return null;\n }\n\n det = 1.0 / det;\n out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;\n out[1] = (a02 * b10 - a01 * b11 - a03 * b09) * det;\n out[2] = (a31 * b05 - a32 * b04 + a33 * b03) * det;\n out[3] = (a22 * b04 - a21 * b05 - a23 * b03) * det;\n out[4] = (a12 * b08 - a10 * b11 - a13 * b07) * det;\n out[5] = (a00 * b11 - a02 * b08 + a03 * b07) * det;\n out[6] = (a32 * b02 - a30 * b05 - a33 * b01) * det;\n out[7] = (a20 * b05 - a22 * b02 + a23 * b01) * det;\n out[8] = (a10 * b10 - a11 * b08 + a13 * b06) * det;\n out[9] = (a01 * b08 - a00 * b10 - a03 * b06) * det;\n out[10] = (a30 * b04 - a31 * b02 + a33 * b00) * det;\n out[11] = (a21 * b02 - a20 * b04 - a23 * b00) * det;\n out[12] = (a11 * b07 - a10 * b09 - a12 * b06) * det;\n out[13] = (a00 * b09 - a01 * b07 + a02 * b06) * det;\n out[14] = (a31 * b01 - a30 * b03 - a32 * b00) * det;\n out[15] = (a20 * b03 - a21 * b01 + a22 * b00) * det;\n\n return out;\n};\n\n\n/**\n * Check if a value is defined in the ENUM dictionary.\n * @param {Object} enumDictionary - ENUM dictionary.\n * @param {Number|String} entryValue - a value to probe.\n * @return {Boolean}\n */\nexports.isDefinedENUMEntry = function(enumDictionary, entryValue) {\n for (let enumKey in enumDictionary) {\n if (entryValue === enumDictionary[enumKey]) {\n return true;\n }\n }\n return false;\n};\n\n\n/**\n * Check if the given object is an instance of BaseAudioContext.\n * @param {AudioContext} context - A context object to be checked.\n * @return {Boolean}\n */\nexports.isAudioContext = function(context) {\n // TODO(hoch): Update this when BaseAudioContext is available for all\n // browsers.\n return context instanceof AudioContext ||\n context instanceof OfflineAudioContext;\n};\n\n\n/**\n * Check if the given object is a valid AudioBuffer.\n * @param {Object} audioBuffer An AudioBuffer object to be checked.\n * @return {Boolean}\n */\nexports.isAudioBuffer = function(audioBuffer) {\n return audioBuffer instanceof AudioBuffer;\n};\n\n\n/**\n * Perform channel-wise merge on multiple AudioBuffers. The sample rate and\n * the length of buffers to be merged must be identical.\n * @param {BaseAudioContext} context - Associated BaseAudioContext.\n * @param {AudioBuffer[]} bufferList - An array of AudioBuffers to be merged\n * channel-wise.\n * @return {AudioBuffer} - A single merged AudioBuffer.\n */\nexports.mergeBufferListByChannel = function(context, bufferList) {\n const bufferLength = bufferList[0].length;\n const bufferSampleRate = bufferList[0].sampleRate;\n let bufferNumberOfChannel = 0;\n\n for (let i = 0; i < bufferList.length; ++i) {\n if (bufferNumberOfChannel > 32) {\n exports.throw('Utils.mergeBuffer: Number of channels cannot exceed 32.' +\n '(got ' + bufferNumberOfChannel + ')');\n }\n if (bufferLength !== bufferList[i].length) {\n exports.throw('Utils.mergeBuffer: AudioBuffer lengths are ' +\n 'inconsistent. (expected ' + bufferLength + ' but got ' +\n bufferList[i].length + ')');\n }\n if (bufferSampleRate !== bufferList[i].sampleRate) {\n exports.throw('Utils.mergeBuffer: AudioBuffer sample rates are ' +\n 'inconsistent. (expected ' + bufferSampleRate + ' but got ' +\n bufferList[i].sampleRate + ')');\n }\n bufferNumberOfChannel += bufferList[i].numberOfChannels;\n }\n\n const buffer = context.createBuffer(bufferNumberOfChannel,\n bufferLength,\n bufferSampleRate);\n let destinationChannelIndex = 0;\n for (let i = 0; i < bufferList.length; ++i) {\n for (let j = 0; j < bufferList[i].numberOfChannels; ++j) {\n buffer.getChannelData(destinationChannelIndex++).set(\n bufferList[i].getChannelData(j));\n }\n }\n\n return buffer;\n};\n\n\n/**\n * Perform channel-wise split by the given channel count. For example,\n * 1 x AudioBuffer(8) -> splitBuffer(context, buffer, 2) -> 4 x AudioBuffer(2).\n * @param {BaseAudioContext} context - Associated BaseAudioContext.\n * @param {AudioBuffer} audioBuffer - An AudioBuffer to be splitted.\n * @param {Number} splitBy - Number of channels to be splitted.\n * @return {AudioBuffer[]} - An array of splitted AudioBuffers.\n */\nexports.splitBufferbyChannel = function(context, audioBuffer, splitBy) {\n if (audioBuffer.numberOfChannels <= splitBy) {\n exports.throw('Utils.splitBuffer: Insufficient number of channels. (' +\n audioBuffer.numberOfChannels + ' splitted by ' + splitBy + ')');\n }\n\n let bufflerList = [];\n let sourceChannelIndex = 0;\n const numberOfSplittedBuffer =\n Math.ceil(audioBuffer.numberOfChannels / splitBy);\n for (let i = 0; i < numberOfSplittedBuffer; ++i) {\n let buffer = context.createBuffer(splitBy,\n audioBuffer.length,\n audioBuffer.sampleRate);\n for (let j = 0; j < splitBy; ++j) {\n if (sourceChannelIndex < audioBuffer.numberOfChannels) {\n buffer.getChannelData(j).set(\n audioBuffer.getChannelData(sourceChannelIndex++));\n }\n }\n bufflerList.push(buffer);\n }\n\n return bufferList;\n};\n\n\n/**\n * Converts Base64-encoded string to ArrayBuffer.\n * @param {string} base64String - Base64-encdoed string.\n * @return {ArrayByuffer} Converted ArrayBuffer object.\n */\nexports.getArrayBufferFromBase64String = function(base64String) {\n let binaryString = window.atob(base64String);\n let byteArray = new Uint8Array(binaryString.length);\n byteArray.forEach(\n (value, index) => byteArray[index] = binaryString.charCodeAt(index));\n return byteArray.buffer;\n};\n\n\n/***/ }),\n/* 1 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Streamlined AudioBuffer loader.\n */\n\n\n\n\nconst Utils = __webpack_require__(0);\n\n/**\n * @typedef {string} BufferDataType\n */\n\n/**\n * Buffer data type for ENUM.\n * @enum {BufferDataType}\n */\nconst BufferDataType = {\n /** @type {string} The data contains Base64-encoded string.. */\n BASE64: 'base64',\n /** @type {string} The data is a URL for audio file. */\n URL: 'url',\n};\n\n\n/**\n * BufferList object mananges the async loading/decoding of multiple\n * AudioBuffers from multiple URLs.\n * @constructor\n * @param {BaseAudioContext} context - Associated BaseAudioContext.\n * @param {string[]} bufferData - An ordered list of URLs.\n * @param {Object} options - Options\n * @param {string} [options.dataType='base64'] - BufferDataType specifier.\n * @param {Boolean} [options.verbose=false] - Log verbosity. |true| prints the\n * individual message from each URL and AudioBuffer.\n */\nfunction BufferList(context, bufferData, options) {\n this._context = Utils.isAudioContext(context) ?\n context :\n Utils.throw('BufferList: Invalid BaseAudioContext.');\n\n this._options = {\n dataType: BufferDataType.BASE64,\n verbose: false,\n };\n\n if (options) {\n if (options.dataType &&\n Utils.isDefinedENUMEntry(BufferDataType, options.dataType)) {\n this._options.dataType = options.dataType;\n }\n if (options.verbose) {\n this._options.verbose = Boolean(options.verbose);\n }\n }\n\n this._bufferList = [];\n this._bufferData = this._options.dataType === BufferDataType.BASE64\n ? bufferData\n : bufferData.slice(0);\n this._numberOfTasks = this._bufferData.length;\n\n this._resolveHandler = null;\n this._rejectHandler = new Function();\n}\n\n\n/**\n * Starts AudioBuffer loading tasks.\n * @return {Promise} The promise resolves with an array of\n * AudioBuffer.\n */\nBufferList.prototype.load = function() {\n return new Promise(this._promiseGenerator.bind(this));\n};\n\n\n/**\n * Promise argument generator. Internally starts multiple async loading tasks.\n * @private\n * @param {function} resolve Promise resolver.\n * @param {function} reject Promise reject.\n */\nBufferList.prototype._promiseGenerator = function(resolve, reject) {\n if (typeof resolve !== 'function') {\n Utils.throw('BufferList: Invalid Promise resolver.');\n } else {\n this._resolveHandler = resolve;\n }\n\n if (typeof reject === 'function') {\n this._rejectHandler = reject;\n }\n\n for (let i = 0; i < this._bufferData.length; ++i) {\n this._options.dataType === BufferDataType.BASE64\n ? this._launchAsyncLoadTask(i)\n : this._launchAsyncLoadTaskXHR(i);\n }\n};\n\n\n/**\n * Run async loading task for Base64-encoded string.\n * @private\n * @param {Number} taskId Task ID number from the ordered list |bufferData|.\n */\nBufferList.prototype._launchAsyncLoadTask = function(taskId) {\n const that = this;\n this._context.decodeAudioData(\n Utils.getArrayBufferFromBase64String(this._bufferData[taskId]),\n function(audioBuffer) {\n that._updateProgress(taskId, audioBuffer);\n },\n function(errorMessage) {\n that._updateProgress(taskId, null);\n const message = 'BufferList: decoding ArrayByffer(\"' + taskId +\n '\" from Base64-encoded data failed. (' + errorMessage + ')';\n Utils.throw(message);\n that._rejectHandler(message);\n });\n};\n\n\n/**\n * Run async loading task via XHR for audio file URLs.\n * @private\n * @param {Number} taskId Task ID number from the ordered list |bufferData|.\n */\nBufferList.prototype._launchAsyncLoadTaskXHR = function(taskId) {\n const xhr = new XMLHttpRequest();\n xhr.open('GET', this._bufferData[taskId]);\n xhr.responseType = 'arraybuffer';\n\n const that = this;\n xhr.onload = function() {\n if (xhr.status === 200) {\n that._context.decodeAudioData(\n xhr.response,\n function(audioBuffer) {\n that._updateProgress(taskId, audioBuffer);\n },\n function(errorMessage) {\n that._updateProgress(taskId, null);\n const message = 'BufferList: decoding \"' +\n that._bufferData[taskId] + '\" failed. (' + errorMessage + ')';\n Utils.throw(message);\n that._rejectHandler(message);\n });\n } else {\n const message = 'BufferList: XHR error while loading \"' +\n that._bufferData[taskId] + '(' + xhr.statusText + ')';\n Utils.throw(message);\n that._rejectHandler(message);\n }\n };\n\n xhr.onerror = function(event) {\n Utils.throw(\n 'BufferList: XHR network failed on loading \"' +\n that._bufferData[taskId] + '\".');\n that._updateProgress(taskId, null);\n that._rejectHandler();\n };\n\n xhr.send();\n};\n\n\n/**\n * Updates the overall progress on loading tasks.\n * @param {Number} taskId Task ID number.\n * @param {AudioBuffer} audioBuffer Decoded AudioBuffer object.\n */\nBufferList.prototype._updateProgress = function(taskId, audioBuffer) {\n this._bufferList[taskId] = audioBuffer;\n\n if (this._options.verbose) {\n let messageString = this._options.dataType === BufferDataType.BASE64\n ? 'ArrayBuffer(' + taskId + ') from Base64-encoded HRIR'\n : '\"' + this._bufferData[taskId] + '\"';\n Utils.log('BufferList: ' + messageString + ' successfully loaded.');\n }\n\n if (--this._numberOfTasks === 0) {\n let messageString = this._options.dataType === BufferDataType.BASE64\n ? this._bufferData.length + ' AudioBuffers from Base64-encoded HRIRs'\n : this._bufferData.length + ' files via XHR';\n Utils.log('BufferList: ' + messageString + ' loaded successfully.');\n this._resolveHandler(this._bufferList);\n }\n};\n\n\nmodule.exports = BufferList;\n\n\n/***/ }),\n/* 2 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file An audio channel router to resolve different channel layouts between\n * browsers.\n */\n\n\n\n\n/**\n * @typedef {Number[]} ChannelMap\n */\n\n/**\n * Channel map dictionary ENUM.\n * @enum {ChannelMap}\n */\nconst ChannelMap = {\n /** @type {Number[]} - ACN channel map for Chrome and FireFox. (FFMPEG) */\n DEFAULT: [0, 1, 2, 3],\n /** @type {Number[]} - Safari's 4-channel map for AAC codec. */\n SAFARI: [2, 0, 1, 3],\n /** @type {Number[]} - ACN > FuMa conversion map. */\n FUMA: [0, 3, 1, 2],\n};\n\n\n/**\n * Channel router for FOA stream.\n * @constructor\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Number[]} channelMap - Routing destination array.\n */\nfunction FOARouter(context, channelMap) {\n this._context = context;\n\n this._splitter = this._context.createChannelSplitter(4);\n this._merger = this._context.createChannelMerger(4);\n\n // input/output proxy.\n this.input = this._splitter;\n this.output = this._merger;\n\n this.setChannelMap(channelMap || ChannelMap.DEFAULT);\n}\n\n\n/**\n * Sets channel map.\n * @param {Number[]} channelMap - A new channel map for FOA stream.\n */\nFOARouter.prototype.setChannelMap = function(channelMap) {\n if (!Array.isArray(channelMap)) {\n return;\n }\n\n this._channelMap = channelMap;\n this._splitter.disconnect();\n this._splitter.connect(this._merger, 0, this._channelMap[0]);\n this._splitter.connect(this._merger, 1, this._channelMap[1]);\n this._splitter.connect(this._merger, 2, this._channelMap[2]);\n this._splitter.connect(this._merger, 3, this._channelMap[3]);\n};\n\n\n/**\n * Static channel map ENUM.\n * @static\n * @type {ChannelMap}\n */\nFOARouter.ChannelMap = ChannelMap;\n\n\nmodule.exports = FOARouter;\n\n\n/***/ }),\n/* 3 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Sound field rotator for first-order-ambisonics decoding.\n */\n\n\n\n\n/**\n * First-order-ambisonic decoder based on gain node network.\n * @constructor\n * @param {AudioContext} context - Associated AudioContext.\n */\nfunction FOARotator(context) {\n this._context = context;\n\n this._splitter = this._context.createChannelSplitter(4);\n this._inY = this._context.createGain();\n this._inZ = this._context.createGain();\n this._inX = this._context.createGain();\n this._m0 = this._context.createGain();\n this._m1 = this._context.createGain();\n this._m2 = this._context.createGain();\n this._m3 = this._context.createGain();\n this._m4 = this._context.createGain();\n this._m5 = this._context.createGain();\n this._m6 = this._context.createGain();\n this._m7 = this._context.createGain();\n this._m8 = this._context.createGain();\n this._outY = this._context.createGain();\n this._outZ = this._context.createGain();\n this._outX = this._context.createGain();\n this._merger = this._context.createChannelMerger(4);\n\n // ACN channel ordering: [1, 2, 3] => [-Y, Z, -X]\n // Y (from channel 1)\n this._splitter.connect(this._inY, 1);\n // Z (from channel 2)\n this._splitter.connect(this._inZ, 2);\n // X (from channel 3)\n this._splitter.connect(this._inX, 3);\n this._inY.gain.value = -1;\n this._inX.gain.value = -1;\n\n // Apply the rotation in the world space.\n // |Y| | m0 m3 m6 | | Y * m0 + Z * m3 + X * m6 | | Yr |\n // |Z| * | m1 m4 m7 | = | Y * m1 + Z * m4 + X * m7 | = | Zr |\n // |X| | m2 m5 m8 | | Y * m2 + Z * m5 + X * m8 | | Xr |\n this._inY.connect(this._m0);\n this._inY.connect(this._m1);\n this._inY.connect(this._m2);\n this._inZ.connect(this._m3);\n this._inZ.connect(this._m4);\n this._inZ.connect(this._m5);\n this._inX.connect(this._m6);\n this._inX.connect(this._m7);\n this._inX.connect(this._m8);\n this._m0.connect(this._outY);\n this._m1.connect(this._outZ);\n this._m2.connect(this._outX);\n this._m3.connect(this._outY);\n this._m4.connect(this._outZ);\n this._m5.connect(this._outX);\n this._m6.connect(this._outY);\n this._m7.connect(this._outZ);\n this._m8.connect(this._outX);\n\n // Transform 3: world space to audio space.\n // W -> W (to channel 0)\n this._splitter.connect(this._merger, 0, 0);\n // Y (to channel 1)\n this._outY.connect(this._merger, 0, 1);\n // Z (to channel 2)\n this._outZ.connect(this._merger, 0, 2);\n // X (to channel 3)\n this._outX.connect(this._merger, 0, 3);\n this._outY.gain.value = -1;\n this._outX.gain.value = -1;\n\n this.setRotationMatrix3(new Float32Array([1, 0, 0, 0, 1, 0, 0, 0, 1]));\n\n // input/output proxy.\n this.input = this._splitter;\n this.output = this._merger;\n}\n\n\n/**\n * Updates the rotation matrix with 3x3 matrix.\n * @param {Number[]} rotationMatrix3 - A 3x3 rotation matrix. (column-major)\n */\nFOARotator.prototype.setRotationMatrix3 = function(rotationMatrix3) {\n this._m0.gain.value = rotationMatrix3[0];\n this._m1.gain.value = rotationMatrix3[1];\n this._m2.gain.value = rotationMatrix3[2];\n this._m3.gain.value = rotationMatrix3[3];\n this._m4.gain.value = rotationMatrix3[4];\n this._m5.gain.value = rotationMatrix3[5];\n this._m6.gain.value = rotationMatrix3[6];\n this._m7.gain.value = rotationMatrix3[7];\n this._m8.gain.value = rotationMatrix3[8];\n};\n\n\n/**\n * Updates the rotation matrix with 4x4 matrix.\n * @param {Number[]} rotationMatrix4 - A 4x4 rotation matrix. (column-major)\n */\nFOARotator.prototype.setRotationMatrix4 = function(rotationMatrix4) {\n this._m0.gain.value = rotationMatrix4[0];\n this._m1.gain.value = rotationMatrix4[1];\n this._m2.gain.value = rotationMatrix4[2];\n this._m3.gain.value = rotationMatrix4[4];\n this._m4.gain.value = rotationMatrix4[5];\n this._m5.gain.value = rotationMatrix4[6];\n this._m6.gain.value = rotationMatrix4[8];\n this._m7.gain.value = rotationMatrix4[9];\n this._m8.gain.value = rotationMatrix4[10];\n};\n\n\n/**\n * Returns the current 3x3 rotation matrix.\n * @return {Number[]} - A 3x3 rotation matrix. (column-major)\n */\nFOARotator.prototype.getRotationMatrix3 = function() {\n return [\n this._m0.gain.value, this._m1.gain.value, this._m2.gain.value,\n this._m3.gain.value, this._m4.gain.value, this._m5.gain.value,\n this._m6.gain.value, this._m7.gain.value, this._m8.gain.value,\n ];\n};\n\n\n/**\n * Returns the current 4x4 rotation matrix.\n * @return {Number[]} - A 4x4 rotation matrix. (column-major)\n */\nFOARotator.prototype.getRotationMatrix4 = function() {\n let rotationMatrix4 = new Float32Array(16);\n rotationMatrix4[0] = this._m0.gain.value;\n rotationMatrix4[1] = this._m1.gain.value;\n rotationMatrix4[2] = this._m2.gain.value;\n rotationMatrix4[4] = this._m3.gain.value;\n rotationMatrix4[5] = this._m4.gain.value;\n rotationMatrix4[6] = this._m5.gain.value;\n rotationMatrix4[8] = this._m6.gain.value;\n rotationMatrix4[9] = this._m7.gain.value;\n rotationMatrix4[10] = this._m8.gain.value;\n return rotationMatrix4;\n};\n\n\nmodule.exports = FOARotator;\n\n\n/***/ }),\n/* 4 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * @file A collection of convolvers. Can be used for the optimized FOA binaural\n * rendering. (e.g. SH-MaxRe HRTFs)\n */\n\n\n\n\n/**\n * FOAConvolver. A collection of 2 stereo convolvers for 4-channel FOA stream.\n * @constructor\n * @param {BaseAudioContext} context The associated AudioContext.\n * @param {AudioBuffer[]} [hrirBufferList] - An ordered-list of stereo\n * AudioBuffers for convolution. (i.e. 2 stereo AudioBuffers for FOA)\n */\nfunction FOAConvolver(context, hrirBufferList) {\n this._context = context;\n\n this._active = false;\n this._isBufferLoaded = false;\n\n this._buildAudioGraph();\n\n if (hrirBufferList) {\n this.setHRIRBufferList(hrirBufferList);\n }\n\n this.enable();\n}\n\n\n/**\n * Build the internal audio graph.\n *\n * @private\n */\nFOAConvolver.prototype._buildAudioGraph = function() {\n this._splitterWYZX = this._context.createChannelSplitter(4);\n this._mergerWY = this._context.createChannelMerger(2);\n this._mergerZX = this._context.createChannelMerger(2);\n this._convolverWY = this._context.createConvolver();\n this._convolverZX = this._context.createConvolver();\n this._splitterWY = this._context.createChannelSplitter(2);\n this._splitterZX = this._context.createChannelSplitter(2);\n this._inverter = this._context.createGain();\n this._mergerBinaural = this._context.createChannelMerger(2);\n this._summingBus = this._context.createGain();\n\n // Group W and Y, then Z and X.\n this._splitterWYZX.connect(this._mergerWY, 0, 0);\n this._splitterWYZX.connect(this._mergerWY, 1, 1);\n this._splitterWYZX.connect(this._mergerZX, 2, 0);\n this._splitterWYZX.connect(this._mergerZX, 3, 1);\n\n // Create a network of convolvers using splitter/merger.\n this._mergerWY.connect(this._convolverWY);\n this._mergerZX.connect(this._convolverZX);\n this._convolverWY.connect(this._splitterWY);\n this._convolverZX.connect(this._splitterZX);\n this._splitterWY.connect(this._mergerBinaural, 0, 0);\n this._splitterWY.connect(this._mergerBinaural, 0, 1);\n this._splitterWY.connect(this._mergerBinaural, 1, 0);\n this._splitterWY.connect(this._inverter, 1, 0);\n this._inverter.connect(this._mergerBinaural, 0, 1);\n this._splitterZX.connect(this._mergerBinaural, 0, 0);\n this._splitterZX.connect(this._mergerBinaural, 0, 1);\n this._splitterZX.connect(this._mergerBinaural, 1, 0);\n this._splitterZX.connect(this._mergerBinaural, 1, 1);\n\n // By default, WebAudio's convolver does the normalization based on IR's\n // energy. For the precise convolution, it must be disabled before the buffer\n // assignment.\n this._convolverWY.normalize = false;\n this._convolverZX.normalize = false;\n\n // For asymmetric degree.\n this._inverter.gain.value = -1;\n\n // Input/output proxy.\n this.input = this._splitterWYZX;\n this.output = this._summingBus;\n};\n\n\n/**\n * Assigns 2 HRIR AudioBuffers to 2 convolvers: Note that we use 2 stereo\n * convolutions for 4-channel direct convolution. Using mono convolver or\n * 4-channel convolver is not viable because mono convolution wastefully\n * produces the stereo outputs, and the 4-ch convolver does cross-channel\n * convolution. (See Web Audio API spec)\n * @param {AudioBuffer[]} hrirBufferList - An array of stereo AudioBuffers for\n * convolvers.\n */\nFOAConvolver.prototype.setHRIRBufferList = function(hrirBufferList) {\n // After these assignments, the channel data in the buffer is immutable in\n // FireFox. (i.e. neutered) So we should avoid re-assigning buffers, otherwise\n // an exception will be thrown.\n if (this._isBufferLoaded) {\n return;\n }\n\n this._convolverWY.buffer = hrirBufferList[0];\n this._convolverZX.buffer = hrirBufferList[1];\n this._isBufferLoaded = true;\n};\n\n\n/**\n * Enable FOAConvolver instance. The audio graph will be activated and pulled by\n * the WebAudio engine. (i.e. consume CPU cycle)\n */\nFOAConvolver.prototype.enable = function() {\n this._mergerBinaural.connect(this._summingBus);\n this._active = true;\n};\n\n\n/**\n * Disable FOAConvolver instance. The inner graph will be disconnected from the\n * audio destination, thus no CPU cycle will be consumed.\n */\nFOAConvolver.prototype.disable = function() {\n this._mergerBinaural.disconnect();\n this._active = false;\n};\n\n\nmodule.exports = FOAConvolver;\n\n\n/***/ }),\n/* 5 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileOverview DEPRECATED at V1. Audio buffer loading utility.\n */\n\n\n\nconst Utils = __webpack_require__(0);\n\n/**\n * Streamlined audio file loader supports Promise.\n * @param {Object} context AudioContext\n * @param {Object} audioFileData Audio file info as [{name, url}]\n * @param {Function} resolve Resolution handler for promise.\n * @param {Function} reject Rejection handler for promise.\n * @param {Function} progress Progress event handler.\n */\nfunction AudioBufferManager(context, audioFileData, resolve, reject, progress) {\n this._context = context;\n\n this._buffers = new Map();\n this._loadingTasks = {};\n\n this._resolve = resolve;\n this._reject = reject;\n this._progress = progress;\n\n // Iterating file loading.\n for (let i = 0; i < audioFileData.length; i++) {\n const fileInfo = audioFileData[i];\n\n // Check for duplicates filename and quit if it happens.\n if (this._loadingTasks.hasOwnProperty(fileInfo.name)) {\n Utils.log('Duplicated filename when loading: ' + fileInfo.name);\n return;\n }\n\n // Mark it as pending (0)\n this._loadingTasks[fileInfo.name] = 0;\n this._loadAudioFile(fileInfo);\n }\n}\n\nAudioBufferManager.prototype._loadAudioFile = function(fileInfo) {\n const xhr = new XMLHttpRequest();\n xhr.open('GET', fileInfo.url);\n xhr.responseType = 'arraybuffer';\n\n const that = this;\n xhr.onload = function() {\n if (xhr.status === 200) {\n that._context.decodeAudioData(xhr.response,\n function(buffer) {\n // Utils.log('File loaded: ' + fileInfo.url);\n that._done(fileInfo.name, buffer);\n },\n function(message) {\n Utils.log('Decoding failure: '\n + fileInfo.url + ' (' + message + ')');\n that._done(fileInfo.name, null);\n });\n } else {\n Utils.log('XHR Error: ' + fileInfo.url + ' (' + xhr.statusText\n + ')');\n that._done(fileInfo.name, null);\n }\n };\n\n // TODO: fetch local resources if XHR fails.\n xhr.onerror = function(event) {\n Utils.log('XHR Network failure: ' + fileInfo.url);\n that._done(fileInfo.name, null);\n };\n\n xhr.send();\n};\n\nAudioBufferManager.prototype._done = function(filename, buffer) {\n // Label the loading task.\n this._loadingTasks[filename] = buffer !== null ? 'loaded' : 'failed';\n\n // A failed task will be a null buffer.\n this._buffers.set(filename, buffer);\n\n this._updateProgress(filename);\n};\n\nAudioBufferManager.prototype._updateProgress = function(filename) {\n let numberOfFinishedTasks = 0;\n let numberOfFailedTask = 0;\n let numberOfTasks = 0;\n\n for (const task in this._loadingTasks) {\n if (Object.prototype.hasOwnProperty.call(this._loadingTasks, task)) {\n numberOfTasks++;\n if (this._loadingTasks[task] === 'loaded') {\n numberOfFinishedTasks++;\n } else if (this._loadingTasks[task] === 'failed') {\n numberOfFailedTask++;\n }\n }\n }\n\n if (typeof this._progress === 'function') {\n this._progress(filename, numberOfFinishedTasks, numberOfTasks);\n return;\n }\n\n if (numberOfFinishedTasks === numberOfTasks) {\n this._resolve(this._buffers);\n return;\n }\n\n if (numberOfFinishedTasks + numberOfFailedTask === numberOfTasks) {\n this._reject(this._buffers);\n return;\n }\n};\n\nmodule.exports = AudioBufferManager;\n\n\n/***/ }),\n/* 6 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * @file Phase matched filter for first-order-ambisonics decoding.\n */\n\n\n\nconst Utils = __webpack_require__(0);\n\n\n// Static parameters.\nconst CROSSOVER_FREQUENCY = 690;\nconst GAIN_COEFFICIENTS = [1.4142, 0.8166, 0.8166, 0.8166];\n\n\n/**\n * Generate the coefficients for dual band filter.\n * @param {Number} crossoverFrequency\n * @param {Number} sampleRate\n * @return {Object} Filter coefficients.\n */\nfunction generateDualBandCoefficients(crossoverFrequency, sampleRate) {\n const k = Math.tan(Math.PI * crossoverFrequency / sampleRate);\n const k2 = k * k;\n const denominator = k2 + 2 * k + 1;\n\n return {\n lowpassA: [1, 2 * (k2 - 1) / denominator, (k2 - 2 * k + 1) / denominator],\n lowpassB: [k2 / denominator, 2 * k2 / denominator, k2 / denominator],\n hipassA: [1, 2 * (k2 - 1) / denominator, (k2 - 2 * k + 1) / denominator],\n hipassB: [1 / denominator, -2 * 1 / denominator, 1 / denominator],\n };\n}\n\n\n/**\n * FOAPhaseMatchedFilter: A set of filters (LP/HP) with a crossover frequency to\n * compensate the gain of high frequency contents without a phase difference.\n * @constructor\n * @param {AudioContext} context - Associated AudioContext.\n */\nfunction FOAPhaseMatchedFilter(context) {\n this._context = context;\n\n this._input = this._context.createGain();\n\n if (!this._context.createIIRFilter) {\n Utils.log('IIR filter is missing. Using Biquad filter instead.');\n this._lpf = this._context.createBiquadFilter();\n this._hpf = this._context.createBiquadFilter();\n this._lpf.frequency.value = CROSSOVER_FREQUENCY;\n this._hpf.frequency.value = CROSSOVER_FREQUENCY;\n this._hpf.type = 'highpass';\n } else {\n const coef = generateDualBandCoefficients(CROSSOVER_FREQUENCY,\n this._context.sampleRate);\n this._lpf = this._context.createIIRFilter(coef.lowpassB, coef.lowpassA);\n this._hpf = this._context.createIIRFilter(coef.hipassB, coef.hipassA);\n }\n\n this._splitterLow = this._context.createChannelSplitter(4);\n this._splitterHigh = this._context.createChannelSplitter(4);\n this._gainHighW = this._context.createGain();\n this._gainHighY = this._context.createGain();\n this._gainHighZ = this._context.createGain();\n this._gainHighX = this._context.createGain();\n this._merger = this._context.createChannelMerger(4);\n\n this._input.connect(this._hpf);\n this._hpf.connect(this._splitterHigh);\n this._splitterHigh.connect(this._gainHighW, 0);\n this._splitterHigh.connect(this._gainHighY, 1);\n this._splitterHigh.connect(this._gainHighZ, 2);\n this._splitterHigh.connect(this._gainHighX, 3);\n this._gainHighW.connect(this._merger, 0, 0);\n this._gainHighY.connect(this._merger, 0, 1);\n this._gainHighZ.connect(this._merger, 0, 2);\n this._gainHighX.connect(this._merger, 0, 3);\n\n this._input.connect(this._lpf);\n this._lpf.connect(this._splitterLow);\n this._splitterLow.connect(this._merger, 0, 0);\n this._splitterLow.connect(this._merger, 1, 1);\n this._splitterLow.connect(this._merger, 2, 2);\n this._splitterLow.connect(this._merger, 3, 3);\n\n // Apply gain correction to hi-passed pressure and velocity components:\n // Inverting sign is necessary as the low-passed and high-passed portion are\n // out-of-phase after the filtering.\n const now = this._context.currentTime;\n this._gainHighW.gain.setValueAtTime(-1 * GAIN_COEFFICIENTS[0], now);\n this._gainHighY.gain.setValueAtTime(-1 * GAIN_COEFFICIENTS[1], now);\n this._gainHighZ.gain.setValueAtTime(-1 * GAIN_COEFFICIENTS[2], now);\n this._gainHighX.gain.setValueAtTime(-1 * GAIN_COEFFICIENTS[3], now);\n\n // Input/output Proxy.\n this.input = this._input;\n this.output = this._merger;\n}\n\n\nmodule.exports = FOAPhaseMatchedFilter;\n\n\n/***/ }),\n/* 7 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * @file Virtual speaker abstraction for first-order-ambisonics decoding.\n */\n\n\n\n\n/**\n * DEPRECATED at V1: A virtual speaker with ambisonic decoding gain coefficients\n * and HRTF convolution for first-order-ambisonics stream. Note that the\n * subgraph directly connects to context's destination.\n * @constructor\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Object} options - Options for speaker.\n * @param {Number[]} options.coefficients - Decoding coefficients for (W,Y,Z,X).\n * @param {AudioBuffer} options.IR - Stereo IR buffer for HRTF convolution.\n * @param {Number} options.gain - Post-gain for the speaker.\n */\nfunction FOAVirtualSpeaker(context, options) {\n if (options.IR.numberOfChannels !== 2) {\n throw new Error('IR does not have 2 channels. cannot proceed.');\n }\n\n this._active = false;\n this._context = context;\n\n this._input = this._context.createChannelSplitter(4);\n this._cW = this._context.createGain();\n this._cY = this._context.createGain();\n this._cZ = this._context.createGain();\n this._cX = this._context.createGain();\n this._convolver = this._context.createConvolver();\n this._gain = this._context.createGain();\n\n this._input.connect(this._cW, 0);\n this._input.connect(this._cY, 1);\n this._input.connect(this._cZ, 2);\n this._input.connect(this._cX, 3);\n this._cW.connect(this._convolver);\n this._cY.connect(this._convolver);\n this._cZ.connect(this._convolver);\n this._cX.connect(this._convolver);\n this._convolver.connect(this._gain);\n this._gain.connect(this._context.destination);\n\n this.enable();\n\n this._convolver.normalize = false;\n this._convolver.buffer = options.IR;\n this._gain.gain.value = options.gain;\n\n // Set gain coefficients for FOA ambisonic streams.\n this._cW.gain.value = options.coefficients[0];\n this._cY.gain.value = options.coefficients[1];\n this._cZ.gain.value = options.coefficients[2];\n this._cX.gain.value = options.coefficients[3];\n\n // Input proxy. Output directly connects to the destination.\n this.input = this._input;\n}\n\n\nFOAVirtualSpeaker.prototype.enable = function() {\n this._gain.connect(this._context.destination);\n this._active = true;\n};\n\n\nFOAVirtualSpeaker.prototype.disable = function() {\n this._gain.disconnect();\n this._active = false;\n};\n\n\nmodule.exports = FOAVirtualSpeaker;\n\n\n/***/ }),\n/* 8 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * @file A collection of convolvers. Can be used for the optimized HOA binaural\n * rendering. (e.g. SH-MaxRe HRTFs)\n */\n\n\n\n\n/**\n * A convolver network for N-channel HOA stream.\n * @constructor\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Number} ambisonicOrder - Ambisonic order. (2 or 3)\n * @param {AudioBuffer[]} [hrirBufferList] - An ordered-list of stereo\n * AudioBuffers for convolution. (SOA: 5 AudioBuffers, TOA: 8 AudioBuffers)\n */\nfunction HOAConvolver(context, ambisonicOrder, hrirBufferList) {\n this._context = context;\n\n this._active = false;\n this._isBufferLoaded = false;\n\n // The number of channels K based on the ambisonic order N where K = (N+1)^2.\n this._ambisonicOrder = ambisonicOrder;\n this._numberOfChannels =\n (this._ambisonicOrder + 1) * (this._ambisonicOrder + 1);\n\n this._buildAudioGraph();\n if (hrirBufferList) {\n this.setHRIRBufferList(hrirBufferList);\n }\n\n this.enable();\n}\n\n\n/**\n * Build the internal audio graph.\n * For TOA convolution:\n * input -> splitter(16) -[0,1]-> merger(2) -> convolver(2) -> splitter(2)\n * -[2,3]-> merger(2) -> convolver(2) -> splitter(2)\n * -[4,5]-> ... (6 more, 8 branches total)\n * @private\n */\nHOAConvolver.prototype._buildAudioGraph = function() {\n const numberOfStereoChannels = Math.ceil(this._numberOfChannels / 2);\n\n this._inputSplitter =\n this._context.createChannelSplitter(this._numberOfChannels);\n this._stereoMergers = [];\n this._convolvers = [];\n this._stereoSplitters = [];\n this._positiveIndexSphericalHarmonics = this._context.createGain();\n this._negativeIndexSphericalHarmonics = this._context.createGain();\n this._inverter = this._context.createGain();\n this._binauralMerger = this._context.createChannelMerger(2);\n this._outputGain = this._context.createGain();\n\n for (let i = 0; i < numberOfStereoChannels; ++i) {\n this._stereoMergers[i] = this._context.createChannelMerger(2);\n this._convolvers[i] = this._context.createConvolver();\n this._stereoSplitters[i] = this._context.createChannelSplitter(2);\n this._convolvers[i].normalize = false;\n }\n\n for (let l = 0; l <= this._ambisonicOrder; ++l) {\n for (let m = -l; m <= l; m++) {\n // We compute the ACN index (k) of ambisonics channel using the degree (l)\n // and index (m): k = l^2 + l + m\n const acnIndex = l * l + l + m;\n const stereoIndex = Math.floor(acnIndex / 2);\n\n // Split channels from input into array of stereo convolvers.\n // Then create a network of mergers that produces the stereo output.\n this._inputSplitter.connect(\n this._stereoMergers[stereoIndex], acnIndex, acnIndex % 2);\n this._stereoMergers[stereoIndex].connect(this._convolvers[stereoIndex]);\n this._convolvers[stereoIndex].connect(this._stereoSplitters[stereoIndex]);\n\n // Positive index (m >= 0) spherical harmonics are symmetrical around the\n // front axis, while negative index (m < 0) spherical harmonics are\n // anti-symmetrical around the front axis. We will exploit this symmetry\n // to reduce the number of convolutions required when rendering to a\n // symmetrical binaural renderer.\n if (m >= 0) {\n this._stereoSplitters[stereoIndex].connect(\n this._positiveIndexSphericalHarmonics, acnIndex % 2);\n } else {\n this._stereoSplitters[stereoIndex].connect(\n this._negativeIndexSphericalHarmonics, acnIndex % 2);\n }\n }\n }\n\n this._positiveIndexSphericalHarmonics.connect(this._binauralMerger, 0, 0);\n this._positiveIndexSphericalHarmonics.connect(this._binauralMerger, 0, 1);\n this._negativeIndexSphericalHarmonics.connect(this._binauralMerger, 0, 0);\n this._negativeIndexSphericalHarmonics.connect(this._inverter);\n this._inverter.connect(this._binauralMerger, 0, 1);\n\n // For asymmetric index.\n this._inverter.gain.value = -1;\n\n // Input/Output proxy.\n this.input = this._inputSplitter;\n this.output = this._outputGain;\n};\n\n\n/**\n * Assigns N HRIR AudioBuffers to N convolvers: Note that we use 2 stereo\n * convolutions for 4-channel direct convolution. Using mono convolver or\n * 4-channel convolver is not viable because mono convolution wastefully\n * produces the stereo outputs, and the 4-ch convolver does cross-channel\n * convolution. (See Web Audio API spec)\n * @param {AudioBuffer[]} hrirBufferList - An array of stereo AudioBuffers for\n * convolvers.\n */\nHOAConvolver.prototype.setHRIRBufferList = function(hrirBufferList) {\n // After these assignments, the channel data in the buffer is immutable in\n // FireFox. (i.e. neutered) So we should avoid re-assigning buffers, otherwise\n // an exception will be thrown.\n if (this._isBufferLoaded) {\n return;\n }\n\n for (let i = 0; i < hrirBufferList.length; ++i) {\n this._convolvers[i].buffer = hrirBufferList[i];\n }\n\n this._isBufferLoaded = true;\n};\n\n\n/**\n * Enable HOAConvolver instance. The audio graph will be activated and pulled by\n * the WebAudio engine. (i.e. consume CPU cycle)\n */\nHOAConvolver.prototype.enable = function() {\n this._binauralMerger.connect(this._outputGain);\n this._active = true;\n};\n\n\n/**\n * Disable HOAConvolver instance. The inner graph will be disconnected from the\n * audio destination, thus no CPU cycle will be consumed.\n */\nHOAConvolver.prototype.disable = function() {\n this._binauralMerger.disconnect();\n this._active = false;\n};\n\n\nmodule.exports = HOAConvolver;\n\n\n/***/ }),\n/* 9 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Sound field rotator for higher-order-ambisonics decoding.\n */\n\n\n\n\n/**\n * Kronecker Delta function.\n * @param {Number} i\n * @param {Number} j\n * @return {Number}\n */\nfunction getKroneckerDelta(i, j) {\n return i === j ? 1 : 0;\n}\n\n\n/**\n * A helper function to allow us to access a matrix array in the same\n * manner, assuming it is a (2l+1)x(2l+1) matrix. [2] uses an odd convention of\n * referring to the rows and columns using centered indices, so the middle row\n * and column are (0, 0) and the upper left would have negative coordinates.\n * @param {Number[]} matrix - N matrices of gainNodes, each with (2n+1) x (2n+1)\n * elements, where n=1,2,...,N.\n * @param {Number} l\n * @param {Number} i\n * @param {Number} j\n * @param {Number} gainValue\n */\nfunction setCenteredElement(matrix, l, i, j, gainValue) {\n const index = (j + l) * (2 * l + 1) + (i + l);\n // Row-wise indexing.\n matrix[l - 1][index].gain.value = gainValue;\n}\n\n\n/**\n * This is a helper function to allow us to access a matrix array in the same\n * manner, assuming it is a (2l+1) x (2l+1) matrix.\n * @param {Number[]} matrix - N matrices of gainNodes, each with (2n+1) x (2n+1)\n * elements, where n=1,2,...,N.\n * @param {Number} l\n * @param {Number} i\n * @param {Number} j\n * @return {Number}\n */\nfunction getCenteredElement(matrix, l, i, j) {\n // Row-wise indexing.\n const index = (j + l) * (2 * l + 1) + (i + l);\n return matrix[l - 1][index].gain.value;\n}\n\n\n/**\n * Helper function defined in [2] that is used by the functions U, V, W.\n * This should not be called on its own, as U, V, and W (and their coefficients)\n * select the appropriate matrix elements to access arguments |a| and |b|.\n * @param {Number[]} matrix - N matrices of gainNodes, each with (2n+1) x (2n+1)\n * elements, where n=1,2,...,N.\n * @param {Number} i\n * @param {Number} a\n * @param {Number} b\n * @param {Number} l\n * @return {Number}\n */\nfunction getP(matrix, i, a, b, l) {\n if (b === l) {\n return getCenteredElement(matrix, 1, i, 1) *\n getCenteredElement(matrix, l - 1, a, l - 1) -\n getCenteredElement(matrix, 1, i, -1) *\n getCenteredElement(matrix, l - 1, a, -l + 1);\n } else if (b === -l) {\n return getCenteredElement(matrix, 1, i, 1) *\n getCenteredElement(matrix, l - 1, a, -l + 1) +\n getCenteredElement(matrix, 1, i, -1) *\n getCenteredElement(matrix, l - 1, a, l - 1);\n } else {\n return getCenteredElement(matrix, 1, i, 0) *\n getCenteredElement(matrix, l - 1, a, b);\n }\n}\n\n\n/**\n * The functions U, V, and W should only be called if the correspondingly\n * named coefficient u, v, w from the function ComputeUVWCoeff() is non-zero.\n * When the coefficient is 0, these would attempt to access matrix elements that\n * are out of bounds. The vector of rotations, |r|, must have the |l - 1|\n * previously completed band rotations. These functions are valid for |l >= 2|.\n * @param {Number[]} matrix - N matrices of gainNodes, each with (2n+1) x (2n+1)\n * elements, where n=1,2,...,N.\n * @param {Number} m\n * @param {Number} n\n * @param {Number} l\n * @return {Number}\n */\nfunction getU(matrix, m, n, l) {\n // Although [1, 2] split U into three cases for m == 0, m < 0, m > 0\n // the actual values are the same for all three cases.\n return getP(matrix, 0, m, n, l);\n}\n\n\n/**\n * The functions U, V, and W should only be called if the correspondingly\n * named coefficient u, v, w from the function ComputeUVWCoeff() is non-zero.\n * When the coefficient is 0, these would attempt to access matrix elements that\n * are out of bounds. The vector of rotations, |r|, must have the |l - 1|\n * previously completed band rotations. These functions are valid for |l >= 2|.\n * @param {Number[]} matrix - N matrices of gainNodes, each with (2n+1) x (2n+1)\n * elements, where n=1,2,...,N.\n * @param {Number} m\n * @param {Number} n\n * @param {Number} l\n * @return {Number}\n */\nfunction getV(matrix, m, n, l) {\n if (m === 0) {\n return getP(matrix, 1, 1, n, l) + getP(matrix, -1, -1, n, l);\n } else if (m > 0) {\n const d = getKroneckerDelta(m, 1);\n return getP(matrix, 1, m - 1, n, l) * Math.sqrt(1 + d) -\n getP(matrix, -1, -m + 1, n, l) * (1 - d);\n } else {\n // Note there is apparent errata in [1,2,2b] dealing with this particular\n // case. [2b] writes it should be P*(1-d)+P*(1-d)^0.5\n // [1] writes it as P*(1+d)+P*(1-d)^0.5, but going through the math by hand,\n // you must have it as P*(1-d)+P*(1+d)^0.5 to form a 2^.5 term, which\n // parallels the case where m > 0.\n const d = getKroneckerDelta(m, -1);\n return getP(matrix, 1, m + 1, n, l) * (1 - d) +\n getP(matrix, -1, -m - 1, n, l) * Math.sqrt(1 + d);\n }\n}\n\n\n/**\n * The functions U, V, and W should only be called if the correspondingly\n * named coefficient u, v, w from the function ComputeUVWCoeff() is non-zero.\n * When the coefficient is 0, these would attempt to access matrix elements that\n * are out of bounds. The vector of rotations, |r|, must have the |l - 1|\n * previously completed band rotations. These functions are valid for |l >= 2|.\n * @param {Number[]} matrix N matrices of gainNodes, each with (2n+1) x (2n+1)\n * elements, where n=1,2,...,N.\n * @param {Number} m\n * @param {Number} n\n * @param {Number} l\n * @return {Number}\n */\nfunction getW(matrix, m, n, l) {\n // Whenever this happens, w is also 0 so W can be anything.\n if (m === 0) {\n return 0;\n }\n\n return m > 0 ? getP(matrix, 1, m + 1, n, l) + getP(matrix, -1, -m - 1, n, l) :\n getP(matrix, 1, m - 1, n, l) - getP(matrix, -1, -m + 1, n, l);\n}\n\n\n/**\n * Calculates the coefficients applied to the U, V, and W functions. Because\n * their equations share many common terms they are computed simultaneously.\n * @param {Number} m\n * @param {Number} n\n * @param {Number} l\n * @return {Array} 3 coefficients for U, V and W functions.\n */\nfunction computeUVWCoeff(m, n, l) {\n const d = getKroneckerDelta(m, 0);\n const reciprocalDenominator =\n Math.abs(n) === l ? 1 / (2 * l * (2 * l - 1)) : 1 / ((l + n) * (l - n));\n\n return [\n Math.sqrt((l + m) * (l - m) * reciprocalDenominator),\n 0.5 * (1 - 2 * d) * Math.sqrt((1 + d) *\n (l + Math.abs(m) - 1) *\n (l + Math.abs(m)) *\n reciprocalDenominator),\n -0.5 * (1 - d) * Math.sqrt((l - Math.abs(m) - 1) * (l - Math.abs(m))) *\n reciprocalDenominator,\n ];\n}\n\n\n/**\n * Calculates the (2l+1) x (2l+1) rotation matrix for the band l.\n * This uses the matrices computed for band 1 and band l-1 to compute the\n * matrix for band l. |rotations| must contain the previously computed l-1\n * rotation matrices.\n * This implementation comes from p. 5 (6346), Table 1 and 2 in [2] taking\n * into account the corrections from [2b].\n * @param {Number[]} matrix - N matrices of gainNodes, each with where\n * n=1,2,...,N.\n * @param {Number} l\n */\nfunction computeBandRotation(matrix, l) {\n // The lth band rotation matrix has rows and columns equal to the number of\n // coefficients within that band (-l <= m <= l implies 2l + 1 coefficients).\n for (let m = -l; m <= l; m++) {\n for (let n = -l; n <= l; n++) {\n const uvwCoefficients = computeUVWCoeff(m, n, l);\n\n // The functions U, V, W are only safe to call if the coefficients\n // u, v, w are not zero.\n if (Math.abs(uvwCoefficients[0]) > 0) {\n uvwCoefficients[0] *= getU(matrix, m, n, l);\n }\n if (Math.abs(uvwCoefficients[1]) > 0) {\n uvwCoefficients[1] *= getV(matrix, m, n, l);\n }\n if (Math.abs(uvwCoefficients[2]) > 0) {\n uvwCoefficients[2] *= getW(matrix, m, n, l);\n }\n\n setCenteredElement(\n matrix, l, m, n,\n uvwCoefficients[0] + uvwCoefficients[1] + uvwCoefficients[2]);\n }\n }\n}\n\n\n/**\n * Compute the HOA rotation matrix after setting the transform matrix.\n * @param {Array} matrix - N matrices of gainNodes, each with (2n+1) x (2n+1)\n * elements, where n=1,2,...,N.\n */\nfunction computeHOAMatrices(matrix) {\n // We start by computing the 2nd-order matrix from the 1st-order matrix.\n for (let i = 2; i <= matrix.length; i++) {\n computeBandRotation(matrix, i);\n }\n}\n\n\n/**\n * Higher-order-ambisonic decoder based on gain node network. We expect\n * the order of the channels to conform to ACN ordering. Below are the helper\n * methods to compute SH rotation using recursion. The code uses maths described\n * in the following papers:\n * [1] R. Green, \"Spherical Harmonic Lighting: The Gritty Details\", GDC 2003,\n * http://www.research.scea.com/gdc2003/spherical-harmonic-lighting.pdf\n * [2] J. Ivanic and K. Ruedenberg, \"Rotation Matrices for Real\n * Spherical Harmonics. Direct Determination by Recursion\", J. Phys.\n * Chem., vol. 100, no. 15, pp. 6342-6347, 1996.\n * http://pubs.acs.org/doi/pdf/10.1021/jp953350u\n * [2b] Corrections to initial publication:\n * http://pubs.acs.org/doi/pdf/10.1021/jp9833350\n * @constructor\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Number} ambisonicOrder - Ambisonic order.\n */\nfunction HOARotator(context, ambisonicOrder) {\n this._context = context;\n this._ambisonicOrder = ambisonicOrder;\n\n // We need to determine the number of channels K based on the ambisonic order\n // N where K = (N + 1)^2.\n const numberOfChannels = (ambisonicOrder + 1) * (ambisonicOrder + 1);\n\n this._splitter = this._context.createChannelSplitter(numberOfChannels);\n this._merger = this._context.createChannelMerger(numberOfChannels);\n\n // Create a set of per-order rotation matrices using gain nodes.\n this._gainNodeMatrix = [];\n let orderOffset;\n let rows;\n let inputIndex;\n let outputIndex;\n let matrixIndex;\n for (let i = 1; i <= ambisonicOrder; i++) {\n // Each ambisonic order requires a separate (2l + 1) x (2l + 1) rotation\n // matrix. We compute the offset value as the first channel index of the\n // current order where\n // k_last = l^2 + l + m,\n // and m = -l\n // k_last = l^2\n orderOffset = i * i;\n\n // Uses row-major indexing.\n rows = (2 * i + 1);\n\n this._gainNodeMatrix[i - 1] = [];\n for (let j = 0; j < rows; j++) {\n inputIndex = orderOffset + j;\n for (let k = 0; k < rows; k++) {\n outputIndex = orderOffset + k;\n matrixIndex = j * rows + k;\n this._gainNodeMatrix[i - 1][matrixIndex] = this._context.createGain();\n this._splitter.connect(\n this._gainNodeMatrix[i - 1][matrixIndex], inputIndex);\n this._gainNodeMatrix[i - 1][matrixIndex].connect(\n this._merger, 0, outputIndex);\n }\n }\n }\n\n // W-channel is not involved in rotation, skip straight to ouput.\n this._splitter.connect(this._merger, 0, 0);\n\n // Default Identity matrix.\n this.setRotationMatrix3(new Float32Array([1, 0, 0, 0, 1, 0, 0, 0, 1]));\n\n // Input/Output proxy.\n this.input = this._splitter;\n this.output = this._merger;\n}\n\n\n/**\n * Updates the rotation matrix with 3x3 matrix.\n * @param {Number[]} rotationMatrix3 - A 3x3 rotation matrix. (column-major)\n */\nHOARotator.prototype.setRotationMatrix3 = function(rotationMatrix3) {\n for (let i = 0; i < 9; ++i) {\n this._gainNodeMatrix[0][i].gain.value = rotationMatrix3[i];\n }\n computeHOAMatrices(this._gainNodeMatrix);\n};\n\n\n/**\n * Updates the rotation matrix with 4x4 matrix.\n * @param {Number[]} rotationMatrix4 - A 4x4 rotation matrix. (column-major)\n */\nHOARotator.prototype.setRotationMatrix4 = function(rotationMatrix4) {\n this._gainNodeMatrix[0][0].gain.value = rotationMatrix4[0];\n this._gainNodeMatrix[0][1].gain.value = rotationMatrix4[1];\n this._gainNodeMatrix[0][2].gain.value = rotationMatrix4[2];\n this._gainNodeMatrix[0][3].gain.value = rotationMatrix4[4];\n this._gainNodeMatrix[0][4].gain.value = rotationMatrix4[5];\n this._gainNodeMatrix[0][5].gain.value = rotationMatrix4[6];\n this._gainNodeMatrix[0][6].gain.value = rotationMatrix4[8];\n this._gainNodeMatrix[0][7].gain.value = rotationMatrix4[9];\n this._gainNodeMatrix[0][8].gain.value = rotationMatrix4[10];\n computeHOAMatrices(this._gainNodeMatrix);\n};\n\n\n/**\n * Returns the current 3x3 rotation matrix.\n * @return {Number[]} - A 3x3 rotation matrix. (column-major)\n */\nHOARotator.prototype.getRotationMatrix3 = function() {\n let rotationMatrix3 = new Float32Array(9);\n for (let i = 0; i < 9; ++i) {\n rotationMatrix3[i] = this._gainNodeMatrix[0][i].gain.value;\n }\n return rotationMatrix3;\n};\n\n\n/**\n * Returns the current 4x4 rotation matrix.\n * @return {Number[]} - A 4x4 rotation matrix. (column-major)\n */\nHOARotator.prototype.getRotationMatrix4 = function() {\n let rotationMatrix4 = new Float32Array(16);\n rotationMatrix4[0] = this._gainNodeMatrix[0][0].gain.value;\n rotationMatrix4[1] = this._gainNodeMatrix[0][1].gain.value;\n rotationMatrix4[2] = this._gainNodeMatrix[0][2].gain.value;\n rotationMatrix4[4] = this._gainNodeMatrix[0][3].gain.value;\n rotationMatrix4[5] = this._gainNodeMatrix[0][4].gain.value;\n rotationMatrix4[6] = this._gainNodeMatrix[0][5].gain.value;\n rotationMatrix4[8] = this._gainNodeMatrix[0][6].gain.value;\n rotationMatrix4[9] = this._gainNodeMatrix[0][7].gain.value;\n rotationMatrix4[10] = this._gainNodeMatrix[0][8].gain.value;\n return rotationMatrix4;\n};\n\n\n/**\n * Get the current ambisonic order.\n * @return {Number}\n */\nHOARotator.prototype.getAmbisonicOrder = function() {\n return this._ambisonicOrder;\n};\n\n\nmodule.exports = HOARotator;\n\n\n/***/ }),\n/* 10 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * @license\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Namespace for Omnitone library.\n */\n\n\n\n\nexports.Omnitone = __webpack_require__(11);\n\n\n/***/ }),\n/* 11 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Omnitone library name space and user-facing APIs.\n */\n\n\n\n\nconst BufferList = __webpack_require__(1);\nconst FOAConvolver = __webpack_require__(4);\nconst FOADecoder = __webpack_require__(12);\nconst FOAPhaseMatchedFilter = __webpack_require__(6);\nconst FOARenderer = __webpack_require__(14);\nconst FOARotator = __webpack_require__(3);\nconst FOARouter = __webpack_require__(2);\nconst FOAVirtualSpeaker = __webpack_require__(7);\nconst HOAConvolver = __webpack_require__(8);\nconst HOARenderer = __webpack_require__(16);\nconst HOARotator = __webpack_require__(9);\nconst Polyfill = __webpack_require__(19);\nconst Utils = __webpack_require__(0);\nconst Version = __webpack_require__(20);\n\n// DEPRECATED in V1, in favor of BufferList.\nconst AudioBufferManager = __webpack_require__(5);\n\n\n/**\n * Omnitone namespace.\n * @namespace\n */\nlet Omnitone = {};\n\n\n/**\n * @typedef {Object} BrowserInfo\n * @property {string} name - Browser name.\n * @property {string} version - Browser version.\n */\n\n/**\n * An object contains the detected browser name and version.\n * @memberOf Omnitone\n * @static {BrowserInfo}\n */\nOmnitone.browserInfo = Polyfill.getBrowserInfo();\n\n\n// DEPRECATED in V1. DO. NOT. USE.\nOmnitone.loadAudioBuffers = function(context, speakerData) {\n return new Promise(function(resolve, reject) {\n new AudioBufferManager(context, speakerData, function(buffers) {\n resolve(buffers);\n }, reject);\n });\n};\n\n\n/**\n * Performs the async loading/decoding of multiple AudioBuffers from multiple\n * URLs.\n * @param {BaseAudioContext} context - Associated BaseAudioContext.\n * @param {string[]} bufferData - An ordered list of URLs.\n * @param {Object} [options] - BufferList options.\n * @param {String} [options.dataType='url'] - BufferList data type.\n * @return {Promise} - The promise resolves with an array of\n * AudioBuffer.\n */\nOmnitone.createBufferList = function(context, bufferData, options) {\n const bufferList =\n new BufferList(context, bufferData, options || {dataType: 'url'});\n return bufferList.load();\n};\n\n\n/**\n * Perform channel-wise merge on multiple AudioBuffers. The sample rate and\n * the length of buffers to be merged must be identical.\n * @static\n * @function\n * @param {BaseAudioContext} context - Associated BaseAudioContext.\n * @param {AudioBuffer[]} bufferList - An array of AudioBuffers to be merged\n * channel-wise.\n * @return {AudioBuffer} - A single merged AudioBuffer.\n */\nOmnitone.mergeBufferListByChannel = Utils.mergeBufferListByChannel;\n\n\n/**\n * Perform channel-wise split by the given channel count. For example,\n * 1 x AudioBuffer(8) -> splitBuffer(context, buffer, 2) -> 4 x AudioBuffer(2).\n * @static\n * @function\n * @param {BaseAudioContext} context - Associated BaseAudioContext.\n * @param {AudioBuffer} audioBuffer - An AudioBuffer to be splitted.\n * @param {Number} splitBy - Number of channels to be splitted.\n * @return {AudioBuffer[]} - An array of splitted AudioBuffers.\n */\nOmnitone.splitBufferbyChannel = Utils.splitBufferbyChannel;\n\n\n/**\n * Creates an instance of FOA Convolver.\n * @see FOAConvolver\n * @param {BaseAudioContext} context The associated AudioContext.\n * @param {AudioBuffer[]} [hrirBufferList] - An ordered-list of stereo\n * @return {FOAConvolver}\n */\nOmnitone.createFOAConvolver = function(context, hrirBufferList) {\n return new FOAConvolver(context, hrirBufferList);\n};\n\n\n/**\n * Create an instance of FOA Router.\n * @see FOARouter\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Number[]} channelMap - Routing destination array.\n * @return {FOARouter}\n */\nOmnitone.createFOARouter = function(context, channelMap) {\n return new FOARouter(context, channelMap);\n};\n\n\n/**\n * Create an instance of FOA Rotator.\n * @see FOARotator\n * @param {AudioContext} context - Associated AudioContext.\n * @return {FOARotator}\n */\nOmnitone.createFOARotator = function(context) {\n return new FOARotator(context);\n};\n\n\n/**\n * Create an instance of FOAPhaseMatchedFilter.\n * @ignore\n * @see FOAPhaseMatchedFilter\n * @param {AudioContext} context - Associated AudioContext.\n * @return {FOAPhaseMatchedFilter}\n */\nOmnitone.createFOAPhaseMatchedFilter = function(context) {\n return new FOAPhaseMatchedFilter(context);\n};\n\n\n/**\n * Create an instance of FOAVirtualSpeaker. For parameters, refer the\n * definition of VirtualSpeaker class.\n * @ignore\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Object} options - Options.\n * @return {FOAVirtualSpeaker}\n */\nOmnitone.createFOAVirtualSpeaker = function(context, options) {\n return new FOAVirtualSpeaker(context, options);\n};\n\n\n/**\n * DEPRECATED. Use FOARenderer instance.\n * @see FOARenderer\n * @param {AudioContext} context - Associated AudioContext.\n * @param {DOMElement} videoElement - Video or Audio DOM element to be streamed.\n * @param {Object} options - Options for FOA decoder.\n * @param {String} options.baseResourceUrl - Base URL for resources.\n * (base path for HRIR files)\n * @param {Number} [options.postGain=26.0] - Post-decoding gain compensation.\n * @param {Array} [options.routingDestination] Custom channel layout.\n * @return {FOADecoder}\n */\nOmnitone.createFOADecoder = function(context, videoElement, options) {\n Utils.log('WARNING: FOADecoder is deprecated in favor of FOARenderer.');\n return new FOADecoder(context, videoElement, options);\n};\n\n\n/**\n * Create a FOARenderer, the first-order ambisonic decoder and the optimized\n * binaural renderer.\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Object} config\n * @param {Array} [config.channelMap] - Custom channel routing map. Useful for\n * handling the inconsistency in browser's multichannel audio decoding.\n * @param {Array} [config.hrirPathList] - A list of paths to HRIR files. It\n * overrides the internal HRIR list if given.\n * @param {RenderingMode} [config.renderingMode='ambisonic'] - Rendering mode.\n * @return {FOARenderer}\n */\nOmnitone.createFOARenderer = function(context, config) {\n return new FOARenderer(context, config);\n};\n\n\n/**\n * Creates HOARotator for higher-order ambisonics rotation.\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Number} ambisonicOrder - Ambisonic order.\n * @return {HOARotator}\n */\nOmnitone.createHOARotator = function(context, ambisonicOrder) {\n return new HOARotator(context, ambisonicOrder);\n};\n\n\n/**\n * Creates HOAConvolver performs the multi-channel convolution for the optmized\n * binaural rendering.\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Number} ambisonicOrder - Ambisonic order. (2 or 3)\n * @param {AudioBuffer[]} [hrirBufferList] - An ordered-list of stereo\n * AudioBuffers for convolution. (SOA: 5 AudioBuffers, TOA: 8 AudioBuffers)\n * @return {HOAConvovler}\n */\nOmnitone.createHOAConvolver = function(\n context, ambisonicOrder, hrirBufferList) {\n return new HOAConvolver(context, ambisonicOrder, hrirBufferList);\n};\n\n\n/**\n * Creates HOARenderer for higher-order ambisonic decoding and the optimized\n * binaural rendering.\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Object} config\n * @param {Number} [config.ambisonicOrder=3] - Ambisonic order.\n * @param {Array} [config.hrirPathList] - A list of paths to HRIR files. It\n * overrides the internal HRIR list if given.\n * @param {RenderingMode} [config.renderingMode='ambisonic'] - Rendering mode.\n * @return {HOARenderer}\n */\nOmnitone.createHOARenderer = function(context, config) {\n return new HOARenderer(context, config);\n};\n\n\n// Handler Preload Tasks.\n// - Detects the browser information.\n// - Prints out the version number.\n(function() {\n Utils.log('Version ' + Version + ' (running ' +\n Omnitone.browserInfo.name + ' ' + Omnitone.browserInfo.version +\n ' on ' + Omnitone.browserInfo.platform +')');\n if (Omnitone.browserInfo.name.toLowerCase() === 'safari') {\n Polyfill.patchSafari();\n Utils.log(Omnitone.browserInfo.name + ' detected. Appliying polyfill...');\n }\n})();\n\n\nmodule.exports = Omnitone;\n\n\n/***/ }),\n/* 12 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * @file Omnitone FOA decoder, DEPRECATED in favor of FOARenderer.\n */\n\n\n\nconst AudioBufferManager = __webpack_require__(5);\nconst FOARouter = __webpack_require__(2);\nconst FOARotator = __webpack_require__(3);\nconst FOAPhaseMatchedFilter = __webpack_require__(6);\nconst FOAVirtualSpeaker = __webpack_require__(7);\nconst FOASpeakerData = __webpack_require__(13);\nconst Utils = __webpack_require__(0);\n\n// By default, Omnitone fetches IR from the spatial media repository.\nconst HRTFSET_URL = 'https://raw.githubusercontent.com/GoogleChrome/omnitone/master/build/resources/';\n\n// Post gain compensation value.\nlet POST_GAIN_DB = 0;\n\n\n/**\n * Omnitone FOA decoder.\n * @constructor\n * @param {AudioContext} context - Associated AudioContext.\n * @param {VideoElement} videoElement - Target video (or audio) element for\n * streaming.\n * @param {Object} options\n * @param {String} options.HRTFSetUrl - Base URL for the cube HRTF sets.\n * @param {Number} options.postGainDB - Post-decoding gain compensation in dB.\n * @param {Number[]} options.channelMap - Custom channel map.\n */\nfunction FOADecoder(context, videoElement, options) {\n this._isDecoderReady = false;\n this._context = context;\n this._videoElement = videoElement;\n this._decodingMode = 'ambisonic';\n\n this._postGainDB = POST_GAIN_DB;\n this._HRTFSetUrl = HRTFSET_URL;\n this._channelMap = FOARouter.ChannelMap.DEFAULT; // ACN\n\n if (options) {\n if (options.postGainDB) {\n this._postGainDB = options.postGainDB;\n }\n if (options.HRTFSetUrl) {\n this._HRTFSetUrl = options.HRTFSetUrl;\n }\n if (options.channelMap) {\n this._channelMap = options.channelMap;\n }\n }\n\n // Rearrange speaker data based on |options.HRTFSetUrl|.\n this._speakerData = [];\n for (let i = 0; i < FOASpeakerData.length; ++i) {\n this._speakerData.push({\n name: FOASpeakerData[i].name,\n url: this._HRTFSetUrl + '/' + FOASpeakerData[i].url,\n coef: FOASpeakerData[i].coef,\n });\n }\n\n this._tempMatrix4 = new Float32Array(16);\n}\n\n\n/**\n * Initialize and load the resources for the decode.\n * @return {Promise}\n */\nFOADecoder.prototype.initialize = function() {\n Utils.log('Initializing... (mode: ' + this._decodingMode + ')');\n\n // Rerouting channels if necessary.\n let channelMapString = this._channelMap.toString();\n let defaultChannelMapString = FOARouter.ChannelMap.DEFAULT.toString();\n if (channelMapString !== defaultChannelMapString) {\n Utils.log('Remapping channels ([' + defaultChannelMapString + '] -> ['\n + channelMapString + '])');\n }\n\n this._audioElementSource =\n this._context.createMediaElementSource(this._videoElement);\n this._foaRouter = new FOARouter(this._context, this._channelMap);\n this._foaRotator = new FOARotator(this._context);\n this._foaPhaseMatchedFilter = new FOAPhaseMatchedFilter(this._context);\n\n this._audioElementSource.connect(this._foaRouter.input);\n this._foaRouter.output.connect(this._foaRotator.input);\n this._foaRotator.output.connect(this._foaPhaseMatchedFilter.input);\n\n this._foaVirtualSpeakers = [];\n\n // Bypass signal path.\n this._bypass = this._context.createGain();\n this._audioElementSource.connect(this._bypass);\n\n // Get the linear amplitude from the post gain option, which is in decibel.\n const postGainLinear = Math.pow(10, this._postGainDB/20);\n Utils.log('Gain compensation: ' + postGainLinear + ' (' + this._postGainDB\n + 'dB)');\n\n // This returns a promise so developers can use the decoder when it is ready.\n const that = this;\n return new Promise(function(resolve, reject) {\n new AudioBufferManager(that._context, that._speakerData,\n function(buffers) {\n for (let i = 0; i < that._speakerData.length; ++i) {\n that._foaVirtualSpeakers[i] = new FOAVirtualSpeaker(that._context, {\n coefficients: that._speakerData[i].coef,\n IR: buffers.get(that._speakerData[i].name),\n gain: postGainLinear,\n });\n\n that._foaPhaseMatchedFilter.output.connect(\n that._foaVirtualSpeakers[i].input);\n }\n\n // Set the decoding mode.\n that.setMode(that._decodingMode);\n that._isDecoderReady = true;\n Utils.log('HRTF IRs are loaded successfully. The decoder is ready.');\n resolve();\n }, reject);\n });\n};\n\n/**\n * Set the rotation matrix for the sound field rotation.\n * @param {Array} rotationMatrix 3x3 rotation matrix (row-major\n * representation)\n */\nFOADecoder.prototype.setRotationMatrix = function(rotationMatrix) {\n this._foaRotator.setRotationMatrix(rotationMatrix);\n};\n\n\n/**\n * Update the rotation matrix from a Three.js camera object.\n * @param {Object} cameraMatrix The Matrix4 obejct of Three.js the camera.\n */\nFOADecoder.prototype.setRotationMatrixFromCamera = function(cameraMatrix) {\n // Extract the inner array elements and inverse. (The actual view rotation is\n // the opposite of the camera movement.)\n Utils.invertMatrix4(this._tempMatrix4, cameraMatrix.elements);\n this._foaRotator.setRotationMatrix4(this._tempMatrix4);\n};\n\n/**\n * Set the decoding mode.\n * @param {String} mode Decoding mode. When the mode is 'bypass'\n * the decoder is disabled and bypass the\n * input stream to the output. Setting the\n * mode to 'ambisonic' activates the decoder.\n * When the mode is 'off', all the\n * processing is completely turned off saving\n * the CPU power.\n */\nFOADecoder.prototype.setMode = function(mode) {\n if (mode === this._decodingMode) {\n return;\n }\n\n switch (mode) {\n case 'bypass':\n this._decodingMode = 'bypass';\n for (let i = 0; i < this._foaVirtualSpeakers.length; ++i) {\n this._foaVirtualSpeakers[i].disable();\n }\n this._bypass.connect(this._context.destination);\n break;\n\n case 'ambisonic':\n this._decodingMode = 'ambisonic';\n for (let i = 0; i < this._foaVirtualSpeakers.length; ++i) {\n this._foaVirtualSpeakers[i].enable();\n }\n this._bypass.disconnect();\n break;\n\n case 'off':\n this._decodingMode = 'off';\n for (let i = 0; i < this._foaVirtualSpeakers.length; ++i) {\n this._foaVirtualSpeakers[i].disable();\n }\n this._bypass.disconnect();\n break;\n\n default:\n break;\n }\n\n Utils.log('Decoding mode changed. (' + mode + ')');\n};\n\nmodule.exports = FOADecoder;\n\n\n/***/ }),\n/* 13 */\n/***/ (function(module, exports) {\n\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * The data for FOAVirtualSpeaker. Each entry contains the URL for IR files and\n * the gain coefficients for the associated IR files. Note that the order of\n * coefficients follows the ACN channel ordering. (W,Y,Z,X)\n * @type {Object[]}\n */\nconst FOASpeakerData = [{\n name: 'E35_A135',\n url: 'E35_A135.wav',\n gainFactor: 1,\n coef: [.1250, 0.216495, 0.21653, -0.216495],\n}, {\n name: 'E35_A-135',\n url: 'E35_A-135.wav',\n gainFactor: 1,\n coef: [.1250, -0.216495, 0.21653, -0.216495],\n}, {\n name: 'E-35_A135',\n url: 'E-35_A135.wav',\n gainFactor: 1,\n coef: [.1250, 0.216495, -0.21653, -0.216495],\n}, {\n name: 'E-35_A-135',\n url: 'E-35_A-135.wav',\n gainFactor: 1,\n coef: [.1250, -0.216495, -0.21653, -0.216495],\n}, {\n name: 'E35_A45',\n url: 'E35_A45.wav',\n gainFactor: 1,\n coef: [.1250, 0.216495, 0.21653, 0.216495],\n}, {\n name: 'E35_A-45',\n url: 'E35_A-45.wav',\n gainFactor: 1,\n coef: [.1250, -0.216495, 0.21653, 0.216495],\n}, {\n name: 'E-35_A45',\n url: 'E-35_A45.wav',\n gainFactor: 1,\n coef: [.1250, 0.216495, -0.21653, 0.216495],\n}, {\n name: 'E-35_A-45',\n url: 'E-35_A-45.wav',\n gainFactor: 1,\n coef: [.1250, -0.216495, -0.21653, 0.216495],\n}];\n\n\nmodule.exports = FOASpeakerData;\n\n\n/***/ }),\n/* 14 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * @file Omnitone FOARenderer. This is user-facing API for the first-order\n * ambisonic decoder and the optimized binaural renderer.\n */\n\n\n\nconst BufferList = __webpack_require__(1);\nconst FOAConvolver = __webpack_require__(4);\nconst FOAHrirBase64 = __webpack_require__(15);\nconst FOARotator = __webpack_require__(3);\nconst FOARouter = __webpack_require__(2);\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @typedef {string} RenderingMode\n */\n\n/**\n * Rendering mode ENUM.\n * @enum {RenderingMode}\n */\nconst RenderingMode = {\n /** @type {string} Use ambisonic rendering. */\n AMBISONIC: 'ambisonic',\n /** @type {string} Bypass. No ambisonic rendering. */\n BYPASS: 'bypass',\n /** @type {string} Disable audio output. */\n OFF: 'off',\n};\n\n\n/**\n * Omnitone FOA renderer class. Uses the optimized convolution technique.\n * @constructor\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Object} config\n * @param {Array} [config.channelMap] - Custom channel routing map. Useful for\n * handling the inconsistency in browser's multichannel audio decoding.\n * @param {Array} [config.hrirPathList] - A list of paths to HRIR files. It\n * overrides the internal HRIR list if given.\n * @param {RenderingMode} [config.renderingMode='ambisonic'] - Rendering mode.\n */\nfunction FOARenderer(context, config) {\n this._context = Utils.isAudioContext(context) ?\n context :\n Utils.throw('FOARenderer: Invalid BaseAudioContext.');\n\n this._config = {\n channelMap: FOARouter.ChannelMap.DEFAULT,\n renderingMode: RenderingMode.AMBISONIC,\n };\n\n if (config) {\n if (config.channelMap) {\n if (Array.isArray(config.channelMap) && config.channelMap.length === 4) {\n this._config.channelMap = config.channelMap;\n } else {\n Utils.throw(\n 'FOARenderer: Invalid channel map. (got ' + config.channelMap\n + ')');\n }\n }\n\n if (config.hrirPathList) {\n if (Array.isArray(config.hrirPathList) &&\n config.hrirPathList.length === 2) {\n this._config.pathList = config.hrirPathList;\n } else {\n Utils.throw(\n 'FOARenderer: Invalid HRIR URLs. It must be an array with ' +\n '2 URLs to HRIR files. (got ' + config.hrirPathList + ')');\n }\n }\n\n if (config.renderingMode) {\n if (Object.values(RenderingMode).includes(config.renderingMode)) {\n this._config.renderingMode = config.renderingMode;\n } else {\n Utils.log(\n 'FOARenderer: Invalid rendering mode order. (got' +\n config.renderingMode + ') Fallbacks to the mode \"ambisonic\".');\n }\n }\n }\n\n this._buildAudioGraph();\n\n this._tempMatrix4 = new Float32Array(16);\n this._isRendererReady = false;\n}\n\n\n/**\n * Builds the internal audio graph.\n * @private\n */\nFOARenderer.prototype._buildAudioGraph = function() {\n this.input = this._context.createGain();\n this.output = this._context.createGain();\n this._bypass = this._context.createGain();\n this._foaRouter = new FOARouter(this._context, this._config.channelMap);\n this._foaRotator = new FOARotator(this._context);\n this._foaConvolver = new FOAConvolver(this._context);\n this.input.connect(this._foaRouter.input);\n this.input.connect(this._bypass);\n this._foaRouter.output.connect(this._foaRotator.input);\n this._foaRotator.output.connect(this._foaConvolver.input);\n this._foaConvolver.output.connect(this.output);\n\n this.input.channelCount = 4;\n this.input.channelCountMode = 'explicit';\n this.input.channelInterpretation = 'discrete';\n};\n\n\n/**\n * Internal callback handler for |initialize| method.\n * @private\n * @param {function} resolve - Resolution handler.\n * @param {function} reject - Rejection handler.\n */\nFOARenderer.prototype._initializeCallback = function(resolve, reject) {\n const bufferList = this._config.pathList\n ? new BufferList(this._context, this._config.pathList, {dataType: 'url'})\n : new BufferList(this._context, FOAHrirBase64);\n bufferList.load().then(\n function(hrirBufferList) {\n this._foaConvolver.setHRIRBufferList(hrirBufferList);\n this.setRenderingMode(this._config.renderingMode);\n this._isRendererReady = true;\n Utils.log('FOARenderer: HRIRs loaded successfully. Ready.');\n resolve();\n }.bind(this),\n function() {\n const errorMessage = 'FOARenderer: HRIR loading/decoding failed.';\n Utils.throw(errorMessage);\n reject(errorMessage);\n });\n};\n\n\n/**\n * Initializes and loads the resource for the renderer.\n * @return {Promise}\n */\nFOARenderer.prototype.initialize = function() {\n Utils.log(\n 'FOARenderer: Initializing... (mode: ' + this._config.renderingMode +\n ')');\n\n return new Promise(this._initializeCallback.bind(this), function(error) {\n Utils.throw('FOARenderer: Initialization failed. (' + error + ')');\n });\n};\n\n\n/**\n * Set the channel map.\n * @param {Number[]} channelMap - Custom channel routing for FOA stream.\n */\nFOARenderer.prototype.setChannelMap = function(channelMap) {\n if (!this._isRendererReady) {\n return;\n }\n\n if (channelMap.toString() !== this._config.channelMap.toString()) {\n Utils.log(\n 'Remapping channels ([' + this._config.channelMap.toString() +\n '] -> [' + channelMap.toString() + ']).');\n this._config.channelMap = channelMap.slice();\n this._foaRouter.setChannelMap(this._config.channelMap);\n }\n};\n\n\n/**\n * Updates the rotation matrix with 3x3 matrix.\n * @param {Number[]} rotationMatrix3 - A 3x3 rotation matrix. (column-major)\n */\nFOARenderer.prototype.setRotationMatrix3 = function(rotationMatrix3) {\n if (!this._isRendererReady) {\n return;\n }\n\n this._foaRotator.setRotationMatrix3(rotationMatrix3);\n};\n\n\n/**\n * Updates the rotation matrix with 4x4 matrix.\n * @param {Number[]} rotationMatrix4 - A 4x4 rotation matrix. (column-major)\n */\nFOARenderer.prototype.setRotationMatrix4 = function(rotationMatrix4) {\n if (!this._isRendererReady) {\n return;\n }\n\n this._foaRotator.setRotationMatrix4(rotationMatrix4);\n};\n\n\n/**\n * Set the rotation matrix from a Three.js camera object. Depreated in V1, and\n * this exists only for the backward compatiblity. Instead, use\n * |setRotatationMatrix4()| with Three.js |camera.worldMatrix.elements|.\n * @deprecated\n * @param {Object} cameraMatrix - Matrix4 from Three.js |camera.matrix|.\n */\nFOARenderer.prototype.setRotationMatrixFromCamera = function(cameraMatrix) {\n if (!this._isRendererReady) {\n return;\n }\n\n // Extract the inner array elements and inverse. (The actual view rotation is\n // the opposite of the camera movement.)\n Utils.invertMatrix4(this._tempMatrix4, cameraMatrix.elements);\n this._foaRotator.setRotationMatrix4(this._tempMatrix4);\n};\n\n\n/**\n * Set the rendering mode.\n * @param {RenderingMode} mode - Rendering mode.\n * - 'ambisonic': activates the ambisonic decoding/binaurl rendering.\n * - 'bypass': bypasses the input stream directly to the output. No ambisonic\n * decoding or encoding.\n * - 'off': all the processing off saving the CPU power.\n */\nFOARenderer.prototype.setRenderingMode = function(mode) {\n if (mode === this._config.renderingMode) {\n return;\n }\n\n switch (mode) {\n case RenderingMode.AMBISONIC:\n this._foaConvolver.enable();\n this._bypass.disconnect();\n break;\n case RenderingMode.BYPASS:\n this._foaConvolver.disable();\n this._bypass.connect(this.output);\n break;\n case RenderingMode.OFF:\n this._foaConvolver.disable();\n this._bypass.disconnect();\n break;\n default:\n Utils.log(\n 'FOARenderer: Rendering mode \"' + mode + '\" is not ' +\n 'supported.');\n return;\n }\n\n this._config.renderingMode = mode;\n Utils.log('FOARenderer: Rendering mode changed. (' + mode + ')');\n};\n\n\nmodule.exports = FOARenderer;\n\n\n/***/ }),\n/* 15 */\n/***/ (function(module, exports) {\n\nconst OmnitoneFOAHrirBase64 = [\n\"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\",\n\"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\",\n];\n\nmodule.exports = OmnitoneFOAHrirBase64;\n\n\n/***/ }),\n/* 16 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * @file Omnitone HOARenderer. This is user-facing API for the higher-order\n * ambisonic decoder and the optimized binaural renderer.\n */\n\n\n\nconst BufferList = __webpack_require__(1);\nconst HOAConvolver = __webpack_require__(8);\nconst HOARotator = __webpack_require__(9);\nconst TOAHrirBase64 = __webpack_require__(17);\nconst SOAHrirBase64 = __webpack_require__(18);\nconst Utils = __webpack_require__(0);\n\n\n/**\n * @typedef {string} RenderingMode\n */\n\n/**\n * Rendering mode ENUM.\n * @enum {RenderingMode}\n */\nconst RenderingMode = {\n /** @type {string} Use ambisonic rendering. */\n AMBISONIC: 'ambisonic',\n /** @type {string} Bypass. No ambisonic rendering. */\n BYPASS: 'bypass',\n /** @type {string} Disable audio output. */\n OFF: 'off',\n};\n\n\n// Currently SOA and TOA are only supported.\nconst SupportedAmbisonicOrder = [2, 3];\n\n\n/**\n * Omnitone HOA renderer class. Uses the optimized convolution technique.\n * @constructor\n * @param {AudioContext} context - Associated AudioContext.\n * @param {Object} config\n * @param {Number} [config.ambisonicOrder=3] - Ambisonic order.\n * @param {Array} [config.hrirPathList] - A list of paths to HRIR files. It\n * overrides the internal HRIR list if given.\n * @param {RenderingMode} [config.renderingMode='ambisonic'] - Rendering mode.\n */\nfunction HOARenderer(context, config) {\n this._context = Utils.isAudioContext(context) ?\n context :\n Utils.throw('HOARenderer: Invalid BaseAudioContext.');\n\n this._config = {\n ambisonicOrder: 3,\n renderingMode: RenderingMode.AMBISONIC,\n };\n\n if (config && config.ambisonicOrder) {\n if (SupportedAmbisonicOrder.includes(config.ambisonicOrder)) {\n this._config.ambisonicOrder = config.ambisonicOrder;\n } else {\n Utils.log(\n 'HOARenderer: Invalid ambisonic order. (got ' +\n config.ambisonicOrder + ') Fallbacks to 3rd-order ambisonic.');\n }\n }\n\n this._config.numberOfChannels =\n (this._config.ambisonicOrder + 1) * (this._config.ambisonicOrder + 1);\n this._config.numberOfStereoChannels =\n Math.ceil(this._config.numberOfChannels / 2);\n\n if (config && config.hrirPathList) {\n if (Array.isArray(config.hrirPathList) &&\n config.hrirPathList.length === this._config.numberOfStereoChannels) {\n this._config.pathList = config.hrirPathList;\n } else {\n Utils.throw(\n 'HOARenderer: Invalid HRIR URLs. It must be an array with ' +\n this._config.numberOfStereoChannels + ' URLs to HRIR files.' +\n ' (got ' + config.hrirPathList + ')');\n }\n }\n\n if (config && config.renderingMode) {\n if (Object.values(RenderingMode).includes(config.renderingMode)) {\n this._config.renderingMode = config.renderingMode;\n } else {\n Utils.log(\n 'HOARenderer: Invalid rendering mode. (got ' +\n config.renderingMode + ') Fallbacks to \"ambisonic\".');\n }\n }\n\n this._buildAudioGraph();\n\n this._isRendererReady = false;\n}\n\n\n/**\n * Builds the internal audio graph.\n * @private\n */\nHOARenderer.prototype._buildAudioGraph = function() {\n this.input = this._context.createGain();\n this.output = this._context.createGain();\n this._bypass = this._context.createGain();\n this._hoaRotator = new HOARotator(this._context, this._config.ambisonicOrder);\n this._hoaConvolver =\n new HOAConvolver(this._context, this._config.ambisonicOrder);\n this.input.connect(this._hoaRotator.input);\n this.input.connect(this._bypass);\n this._hoaRotator.output.connect(this._hoaConvolver.input);\n this._hoaConvolver.output.connect(this.output);\n\n this.input.channelCount = this._config.numberOfChannels;\n this.input.channelCountMode = 'explicit';\n this.input.channelInterpretation = 'discrete';\n};\n\n\n/**\n * Internal callback handler for |initialize| method.\n * @private\n * @param {function} resolve - Resolution handler.\n * @param {function} reject - Rejection handler.\n */\nHOARenderer.prototype._initializeCallback = function(resolve, reject) {\n let bufferList;\n if (this._config.pathList) {\n bufferList =\n new BufferList(this._context, this._config.pathList, {dataType: 'url'});\n } else {\n bufferList = this._config.ambisonicOrder === 2\n ? new BufferList(this._context, SOAHrirBase64)\n : new BufferList(this._context, TOAHrirBase64);\n }\n\n bufferList.load().then(\n function(hrirBufferList) {\n this._hoaConvolver.setHRIRBufferList(hrirBufferList);\n this.setRenderingMode(this._config.renderingMode);\n this._isRendererReady = true;\n Utils.log('HOARenderer: HRIRs loaded successfully. Ready.');\n resolve();\n }.bind(this),\n function() {\n const errorMessage = 'HOARenderer: HRIR loading/decoding failed.';\n Utils.throw(errorMessage);\n reject(errorMessage);\n });\n};\n\n\n/**\n * Initializes and loads the resource for the renderer.\n * @return {Promise}\n */\nHOARenderer.prototype.initialize = function() {\n Utils.log(\n 'HOARenderer: Initializing... (mode: ' + this._config.renderingMode +\n ', ambisonic order: ' + this._config.ambisonicOrder + ')');\n\n return new Promise(this._initializeCallback.bind(this), function(error) {\n Utils.throw('HOARenderer: Initialization failed. (' + error + ')');\n });\n};\n\n\n/**\n * Updates the rotation matrix with 3x3 matrix.\n * @param {Number[]} rotationMatrix3 - A 3x3 rotation matrix. (column-major)\n */\nHOARenderer.prototype.setRotationMatrix3 = function(rotationMatrix3) {\n if (!this._isRendererReady) {\n return;\n }\n\n this._hoaRotator.setRotationMatrix3(rotationMatrix3);\n};\n\n\n/**\n * Updates the rotation matrix with 4x4 matrix.\n * @param {Number[]} rotationMatrix4 - A 4x4 rotation matrix. (column-major)\n */\nHOARenderer.prototype.setRotationMatrix4 = function(rotationMatrix4) {\n if (!this._isRendererReady) {\n return;\n }\n\n this._hoaRotator.setRotationMatrix4(rotationMatrix4);\n};\n\n\n/**\n * Set the decoding mode.\n * @param {RenderingMode} mode - Decoding mode.\n * - 'ambisonic': activates the ambisonic decoding/binaurl rendering.\n * - 'bypass': bypasses the input stream directly to the output. No ambisonic\n * decoding or encoding.\n * - 'off': all the processing off saving the CPU power.\n */\nHOARenderer.prototype.setRenderingMode = function(mode) {\n if (mode === this._config.renderingMode) {\n return;\n }\n\n switch (mode) {\n case RenderingMode.AMBISONIC:\n this._hoaConvolver.enable();\n this._bypass.disconnect();\n break;\n case RenderingMode.BYPASS:\n this._hoaConvolver.disable();\n this._bypass.connect(this.output);\n break;\n case RenderingMode.OFF:\n this._hoaConvolver.disable();\n this._bypass.disconnect();\n break;\n default:\n Utils.log(\n 'HOARenderer: Rendering mode \"' + mode + '\" is not ' +\n 'supported.');\n return;\n }\n\n this._config.renderingMode = mode;\n Utils.log('HOARenderer: Rendering mode changed. (' + mode + ')');\n};\n\n\nmodule.exports = HOARenderer;\n\n\n/***/ }),\n/* 17 */\n/***/ (function(module, exports) {\n\nconst OmnitoneTOAHrirBase64 = 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= OmnitoneTOAHrirBase64;\n\n\n/***/ }),\n/* 18 */\n/***/ (function(module, exports) {\n\nconst OmnitoneSOAHrirBase64 = [\n\"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\",\n\"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\",\n\"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\",\n\"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= OmnitoneSOAHrirBase64;\n\n\n/***/ }),\n/* 19 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Cross-browser support polyfill for Omnitone library.\n */\n\n\n\n\n/**\n * Detects browser type and version.\n * @return {string[]} - An array contains the detected browser name and version.\n */\nexports.getBrowserInfo = function() {\n const ua = navigator.userAgent;\n let M = ua.match(\n /(opera|chrome|safari|firefox|msie|trident(?=\\/))\\/?\\s*([\\d\\.]+)/i) ||\n [];\n let tem;\n\n if (/trident/i.test(M[1])) {\n tem = /\\brv[ :]+(\\d+)/g.exec(ua) || [];\n return {name: 'IE', version: (tem[1] || '')};\n }\n\n if (M[1] === 'Chrome') {\n tem = ua.match(/\\bOPR|Edge\\/(\\d+)/);\n if (tem != null) {\n return {name: 'Opera', version: tem[1]};\n }\n }\n\n M = M[2] ? [M[1], M[2]] : [navigator.appName, navigator.appVersion, '-?'];\n if ((tem = ua.match(/version\\/([\\d.]+)/i)) != null) {\n M.splice(1, 1, tem[1]);\n }\n\n let platform = ua.match(/android|ipad|iphone/i);\n if (!platform) {\n platform = ua.match(/cros|linux|mac os x|windows/i);\n }\n\n return {\n name: M[0],\n version: M[1],\n platform: platform ? platform[0] : 'unknown',\n };\n};\n\n\n/**\n * Patches AudioContext if the prefixed API is found.\n */\nexports.patchSafari = function() {\n if (window.webkitAudioContext && window.webkitOfflineAudioContext) {\n window.AudioContext = window.webkitAudioContext;\n window.OfflineAudioContext = window.webkitOfflineAudioContext;\n }\n};\n\n\n/***/ }),\n/* 20 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Omnitone version.\n */\n\n\n\n\n/**\n * Omnitone library version\n * @type {String}\n */\nmodule.exports = '1.0.6';\n\n\n/***/ })\n/******/ ]);\n});\n\n/***/ }),\n/* 13 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file ResonanceAudio version.\n * @author Andrew Allen \n */\n\n\n\n\n/**\n * ResonanceAudio library version\n * @type {String}\n */\nmodule.exports = '0.0.4';\n\n\n/***/ })\n/******/ ]);\n});" }, { "path": "examples/benchmark.html", "content": "\n\n\n \n \n \n \n\n \n \n \n\n CPU Benchmark Utility\n \n \n \n\n
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CPU Benchmark Utility

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\n Run an OfflineAudioContext to compute one second of audio\n at 48kHz (48000 samples). Returns the total elapsed time.\n

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Flock of Birds

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\n \"headphones\"\n Best experienced over headphones.\n

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\n Several birds\n \n \n flying around the head in different flight patterns.\n

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Hello World

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\n \"headphones\"\n Best experienced over headphones.\n

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\n Statically position a source\n \"source\"\n front-left to the listener\n \"listener\"\n inside a medium-size room.\n

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A set of examples demonstrating some of the features of Resonance Audio SDK for the Web.

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\n
\n
\n\n \n \n \n \n\n" }, { "path": "examples/resources/examples.css", "content": "* {\n font-family: 'Open Sans', sans-serif;\n}\n\n.icon {\n width: 24px;\n height: 24px;\n border: 1px black solid;\n padding: 4px;\n}\n\n.icon-lg {\n width: 20px;\n height: 20px;\n}\n\n.icon-button {\n width: 16px;\n height: 16px;\n}\n\n.code {\n background-color: #444;\n color: white;\n padding: 10px;\n border: 1px black solid;\n border-radius: 10px;\n}\n\n.slider {\n -webkit-appearance: none; /* Override default CSS styles */\n appearance: none;\n width: 100%;\n height: 43px;\n outline: none;\n}\n\n.slider::-webkit-slider-thumb {\n -webkit-appearance: none;\n appearance: none;\n width: 10px;\n height: 25px;\n cursor: pointer;\n background: #000;\n}\n\n.slider::-moz-range-thumb {\n width: 10px;\n height: 25px;\n cursor: pointer;\n background: #000;\n}\n\n.fullscreen {\n z-index: 9998;\n width: 100%;\n height: 100%;\n position: fixed;\n top: 0;\n left: 0;\n}\n\n.fullscreenContainer {\n z-index: 9999;\n position: fixed;\n top: 0;\n left: 50%;\n}\n\n.noselect {\n -webkit-touch-callout: none; /* iOS Safari */\n -webkit-user-select: none; /* Safari */\n -khtml-user-select: none; /* Konqueror HTML */\n -moz-user-select: none; /* Firefox */\n -ms-user-select: none; /* Internet Explorer/Edge */\n user-select: none; /* Non-prefixed version, currently\n supported by Chrome and Opera */\n}\n\n.breadcrumbIcon {\n width: 30px;\n height: 20px;\n margin: 0px;\n padding: 0px;\n margin-right: 0px;\n}" }, { "path": "examples/resources/js/benchmark.js", "content": "const sampleRate = 48000;\nconst numberOutputChannels = 2;\nconst durationSeconds = 1;\n\nlet playback;\n\n/**\n * Select appropriate dimensions and materials.\n * @return {Object}\n * @private\n */\nfunction selectDimensionsAndMaterials() {\n let reverbLength = document.getElementById('reverbLengthSelect').value;\n switch (reverbLength) {\n case 'none':\n default:\n {\n return {\n dimensions: {\n width: 0,\n height: 0,\n depth: 0,\n },\n materials: {\n left: 'transparent',\n right: 'transparent',\n front: 'transparent',\n back: 'transparent',\n up: 'transparent',\n down: 'transparent',\n },\n };\n }\n break;\n case 'short':\n {\n return {\n dimensions: {\n width: 1.5,\n height: 1.5,\n depth: 1.5,\n },\n materials: {\n left: 'uniform',\n right: 'uniform',\n front: 'uniform',\n back: 'uniform',\n up: 'uniform',\n down: 'uniform',\n },\n };\n }\n break;\n case 'medium':\n {\n return {\n dimensions: {\n width: 6,\n height: 6,\n depth: 6,\n },\n materials: {\n left: 'uniform',\n right: 'uniform',\n front: 'uniform',\n back: 'uniform',\n up: 'uniform',\n down: 'uniform',\n },\n };\n }\n break;\n case 'long':\n {\n return {\n dimensions: {\n width: 24,\n height: 24,\n depth: 24,\n },\n materials: {\n left: 'uniform',\n right: 'uniform',\n front: 'uniform',\n back: 'uniform',\n up: 'uniform',\n down: 'uniform',\n },\n };\n }\n break;\n }\n}\n\n/**\n * Begin processing the benchmark.\n * @private\n */\nfunction startBenchmark() {\n let audioContext =\n new OfflineAudioContext(numberOutputChannels,\n durationSeconds * sampleRate, sampleRate);\n if (typeof webkitOfflineAudioContext !== 'undefined') {\n playback.textContent = 'Begin';\n playback.disabled = false;\n let statusBar = document.getElementById('statusBar');\n statusBar.innerHTML = 'Benchmarks are unsupported on Safari/iOS.';\n statusBar.hidden = false;\n let progressBar = document.getElementById('progressBar');\n progressBar.hidden = true;\n return;\n }\n\n let audioElement = document.createElement('audio');\n audioElement.src = 'resources/cube-sound.wav';\n audioElement.crossOrigin = 'anonymous';\n audioElement.load();\n audioElement.loop = true;\n let audioElementSource = audioContext.createMediaElementSource(audioElement);\n\n let numberSources =\n Number(document.getElementById('numberSourcesNumber').value);\n if (numberSources < 1) {\n playback.textContent = 'Begin';\n playback.disabled = false;\n return;\n }\n\n let renderingMode = document.getElementById('renderingModeSelect');\n let order = -1;\n switch (renderingMode.value) {\n case 'foa':\n {\n order = 1;\n }\n break;\n case 'soa':\n {\n order = 2;\n }\n break;\n case 'toa':\n {\n order = 3;\n }\n break;\n }\n\n let sources = [];\n if (order > -1) {\n let options = selectDimensionsAndMaterials();\n let scene = new ResonanceAudio(audioContext, {\n ambisonicOrder: order,\n dimensions: options.dimensions,\n materials: options.materials,\n });\n for (let i = 0; i < numberSources; i++) {\n sources[i] = scene.createSource();\n audioElementSource.connect(sources[i].input);\n }\n scene.output.connect(audioContext.destination);\n } else {\n for (let i = 0; i < numberSources; i++) {\n sources[i] = audioContext.createPanner();\n sources[i].panningModel = 'HRTF';\n sources[i].distanceModel = 'inverse';\n sources[i].refDistance = 0.1;\n sources[i].maxDistance = 1000;\n audioElementSource.connect(sources[i]);\n sources[i].connect(audioContext.destination);\n }\n }\n\n for (let i = 0; i < numberSources; i++) {\n let theta = Math.random() * Math.PI * 2;\n let phi = Math.acos(Math.random() * 2 - 1);\n let x = Math.cos(theta) * Math.sin(phi);\n let y = Math.cos(phi);\n let z = Math.sin(theta) * Math.sin(phi);\n sources[i].setPosition(x, y, z);\n }\n\n audioElement.currentTime = 0;\n audioElement.play();\n\n window.setTimeout(function() {\n let startTime = Date.now();\n audioContext.startRendering().then(function(renderedBuffer) {\n playback.textContent = 'Begin';\n playback.disabled = false;\n let currentTime = (Date.now() - startTime) / 1000;\n let statusBar = document.getElementById('statusBar');\n statusBar.innerHTML = 'Elapsed Time: ' + currentTime + ' seconds.';\n statusBar.hidden = false;\n let progressBar = document.getElementById('progressBar');\n progressBar.hidden = true;\n }).catch(function(error) {\n console.log(error);\n });\n }, 100);\n}\n\nlet onLoad = function() {\n playback = document.getElementById('playback');\n playback.addEventListener('click', function(event) {\n if (event.target.textContent == 'Begin') {\n playback.disabled = true;\n playback.textContent = 'Please Wait';\n let statusBar = document.getElementById('statusBar');\n statusBar.hidden = true;\n let progressBar = document.getElementById('progressBar');\n progressBar.hidden = false;\n window.setTimeout(startBenchmark, 100);\n } else {\n playback.textContent = 'Begin';\n playback.disabled = false;\n }\n });\n let reverbLength = document.getElementById('reverbLengthSelect');\n let renderingMode = document.getElementById('renderingModeSelect');\n renderingMode.addEventListener('change', function(event) {\n switch (event.target.value) {\n case 'panner-node':\n {\n reverbLength.disabled = true;\n }\n break;\n default:\n {\n reverbLength.disabled = false;\n }\n break;\n }\n });\n};\nwindow.addEventListener('load', onLoad);\n" }, { "path": "examples/resources/js/birds.js", "content": "let numberOfBirds = 8;\nlet elements;\nlet canvasControl;\nlet deltaTimeMilliseconds = 33;\nlet areaSize = 10;\nlet speedRange = 0.2;\nlet speedMinimum = 0.1;\nlet neighborDistance = 0.1;\nlet alignmentWeight = 0.3;\nlet cohesionWeight = 0.1;\nlet separationWeight = 0.15;\nlet radiusMinimum = 0.015;\nlet radiusRange = 0.025 - radiusMinimum;\nlet audioContext;\nlet audioElements = [];\nlet soundSources = [];\nlet intervalCallback;\nlet audioReady = false;\n\n/**\n * @param {Object} elements\n * @private\n */\nfunction updatePositions(elements) {\n if (!audioReady)\n return;\n\n for (let i = 0; i < elements.length - 1; i++) {\n let x = (elements[i].x - 0.5) * areaSize / 2;\n let y = (elements[i].z - 0.5) * areaSize / 2;\n let z = (elements[i].y - 0.5) * areaSize / 2;\n if (i < elements.length - 1) {\n soundSources[i].setPosition(x, y, z);\n }\n }\n}\n\n/**\n * @param {Object} elements\n * @private\n */\nfunction integrateBirdPaths(elements) {\n for (let i = 0; i < elements.length - 1; i++) {\n let alignment = {x: 0, y: 0, z: 0};\n let cohesion = {x: 0, y: 0, z: 0};\n let separation = {x: 0, y: 0, z: 0};\n let numberOfNeighbors = 0;\n\n for (let j = 0; j < elements.length - 1; j++) {\n if (i !== j) {\n let dx = elements[i].x - elements[j].x;\n let dy = elements[i].y - elements[j].y;\n let dz = elements[i].z - elements[j].z;\n let distance = Math.sqrt(dx * dx + dy * dy + dz * dz);\n if (distance < neighborDistance) {\n alignment.x += elements[j].vx;\n alignment.y += elements[j].vy;\n alignment.z += elements[j].vz;\n cohesion.x += elements[j].x;\n cohesion.y += elements[j].y;\n cohesion.z += elements[j].z;\n separation.x += dx;\n separation.y += dy;\n separation.z += dz;\n numberOfNeighbors++;\n }\n }\n }\n if (numberOfNeighbors > 0) {\n // Normalize alignment.\n let alignmentNorm = Math.sqrt(alignment.x * alignment.x +\n alignment.y * alignment.y + alignment.z * alignment.z);\n alignment.x /= alignmentNorm;\n alignment.y /= alignmentNorm;\n alignment.z /= alignmentNorm;\n\n // Normalize cohesion.\n cohesion.x /= numberOfNeighbors;\n cohesion.y /= numberOfNeighbors;\n cohesion.z /= numberOfNeighbors;\n cohesion.x -= elements[i].x;\n cohesion.y -= elements[i].y;\n cohesion.z -= elements[i].z;\n let cohesionNorm = Math.sqrt(cohesion.x * cohesion.x +\n cohesion.y * cohesion.y + cohesion.z * cohesion.z);\n cohesion.x /= cohesionNorm;\n cohesion.y /= cohesionNorm;\n cohesion.z /= cohesionNorm;\n\n // Normalize separation.\n let separationNorm = Math.sqrt(separation.x * separation.x +\n separation.y * separation.y + separation.z * separation.z);\n separation.x /= separationNorm;\n separation.y /= separationNorm;\n separation.z /= separationNorm;\n\n elements[i].vx += alignmentWeight * alignment.x +\n cohesionWeight * cohesion.x + separationWeight * separation.x;\n elements[i].vy += alignmentWeight * alignment.y +\n cohesionWeight * cohesion.y + separationWeight * separation.y;\n elements[i].vz += alignmentWeight * alignment.z +\n cohesionWeight * cohesion.z + separationWeight * separation.z;\n\n let elementVelocityNorm = Math.sqrt(elements[i].vx * elements[i].vx +\n elements[i].vy * elements[i].vy + elements[i].vz * elements[i].vz);\n elements[i].vx = elements[i].vx / elementVelocityNorm * elements[i].speed;\n elements[i].vy = elements[i].vy / elementVelocityNorm * elements[i].speed;\n elements[i].vz = elements[i].vz / elementVelocityNorm * elements[i].speed;\n }\n\n elements[i].x += elements[i].vx * deltaTimeMilliseconds / 1000;\n elements[i].y += elements[i].vy * deltaTimeMilliseconds / 1000;\n elements[i].z += elements[i].vz * deltaTimeMilliseconds / 1000;\n\n if (elements[i].x < 0 || elements[i].x > 1 ||\n elements[i].y < 0 || elements[i].y > 1 ||\n elements[i].z < 0 || elements[i].z > 1) {\n elements[i].x = Math.min(1, Math.max(0, elements[i].x));\n elements[i].y = Math.min(1, Math.max(0, elements[i].y));\n elements[i].z = Math.min(1, Math.max(0, elements[i].z));\n elements[i].vx = -elements[i].vx;\n elements[i].vy = -elements[i].vy;\n elements[i].vz = -elements[i].vz;\n }\n\n elements[i].radius =\n (1 - Math.abs(elements[i].z - 0.5) * 2) * radiusRange + radiusMinimum;\n }\n canvasControl.draw();\n}\n\n/**\n * @private\n */\nfunction initAudio() {\n audioContext = new (window.AudioContext || window.webkitAudioContext);\n let audioSources = [\n 'resources/bird-1.wav',\n 'resources/bird-2.wav',\n 'resources/bird-3.wav',\n 'resources/bird-4.wav',\n 'resources/bird-5.wav',\n 'resources/bird-6.wav',\n ];\n let audioElementSources = [];\n for (let i = 0; i < numberOfBirds; i++) {\n let birdIndex =\n Math.round(Math.random() * (audioSources.length - 1));\n audioElements[i] = document.createElement('audio');\n audioElements[i].src = audioSources[birdIndex];\n audioElements[i].crossOrigin = 'anonymous';\n audioElements[i].load();\n audioElements[i].loop = true;\n audioElementSources[i] =\n audioContext.createMediaElementSource(audioElements[i]);\n }\n\n let scene = new ResonanceAudio(audioContext, {\n ambisonicOrder: 3,\n dimensions: {\n width: 20, height: 6, depth: 20,\n },\n materials: {\n left: 'transparent', right: 'transparent',\n front: 'transparent', back: 'transparent',\n up: 'transparent', down: 'grass',\n },\n });\n for (let i = 0; i < numberOfBirds; i++) {\n soundSources[i] = scene.createSource();\n audioElementSources[i].connect(soundSources[i].input);\n }\n\n let gain = audioContext.createGain();\n gain.gain.value = 1 / (2 * numberOfBirds);\n scene.output.connect(gain);\n gain.connect(audioContext.destination);\n\n audioReady = true;\n}\n\nlet onLoad = function() {\n let canvas = document.getElementById('canvas');\n elements = [];\n for (let i = 0; i < numberOfBirds; i++) {\n elements[i] = {\n icon: 'birdIcon',\n x: Math.random(),\n y: Math.random(),\n z: Math.random(),\n radius: 0.02,\n alpha: 0.333,\n clickable: false,\n };\n elements[i].speed = Math.random() * speedRange + speedMinimum;\n let phaseAzi = Math.random() * Math.PI * 2;\n let phaseEle = Math.random() * Math.PI * 2;\n elements[i].vx =\n Math.cos(phaseAzi) * Math.cos(phaseEle) * elements[i].speed;\n elements[i].vy =\n Math.sin(phaseAzi) * Math.cos(phaseEle) * elements[i].speed;\n elements[i].vz =\n Math.sin(phaseEle) * elements[i].speed;\n }\n elements[elements.length] = {\n icon: 'listenerIcon',\n x: 0.5,\n y: 0.5,\n radius: 0.04,\n alpha: 0.333,\n clickable: false,\n };\n canvasControl = new CanvasControl(canvas, elements, updatePositions);\n\n // Initialize play button functionality.\n let sourcePlayback = document.getElementById('sourceButton');\n sourcePlayback.onclick = function(event) {\n switch (event.target.textContent) {\n case 'Play': {\n if (!audioReady) {\n initAudio();\n }\n event.target.textContent = 'Pause';\n intervalCallback = window.setInterval(\n integrateBirdPaths, deltaTimeMilliseconds, elements);\n for (let i = 0; i < numberOfBirds; i++) {\n audioElements[i].play();\n }\n }\n break;\n case 'Pause': {\n event.target.textContent = 'Play';\n window.clearInterval(intervalCallback);\n for (let i = 0; i < numberOfBirds; i++) {\n audioElements[i].pause();\n }\n }\n break;\n }\n };\n};\nwindow.addEventListener('load', onLoad);\n" }, { "path": "examples/resources/js/canvas-control.js", "content": "/**\n * Class for managing 2D visualization/interaction for audio demos.\n * @param {Object} canvas\n * @param {Object} elements\n * @param {Function} callbackFunc\n */\nfunction CanvasControl(canvas, elements, callbackFunc) {\n this._canvas = canvas;\n this._elements = elements;\n this._callbackFunc = callbackFunc;\n\n this._context = this._canvas.getContext('2d');\n this._cursorDown = false;\n\n this._selected = {\n index: -1,\n xOffset: 0,\n yOffset: 0,\n };\n\n this._lastMoveEventTime = 0;\n this._minimumThreshold = 16;\n let that = this;\n canvas.addEventListener('touchstart', function(event) {\n that._cursorDownFunc(event);\n });\n\n canvas.addEventListener('mousedown', function(event) {\n that._cursorDownFunc(event);\n });\n\n canvas.addEventListener('touchmove', function(event) {\n let currentEventTime = Date.now();\n if (currentEventTime - that._lastMoveEventTime > that._minimumThreshold) {\n that._lastMoveEventTime = currentEventTime;\n if (that._cursorMoveFunc(event)) {\n event.preventDefault();\n }\n }\n }, true);\n\n canvas.addEventListener('mousemove', function(event) {\n let currentEventTime = Date.now();\n if (currentEventTime - that._lastMoveEventTime > that._minimumThreshold) {\n that._lastMoveEventTime = currentEventTime;\n that._cursorMoveFunc(event);\n }\n });\n\n document.addEventListener('touchend', function(event) {\n that._cursorUpFunc(event);\n });\n\n document.addEventListener('mouseup', function(event) {\n that._cursorUpFunc(event);\n });\n\n window.addEventListener('resize', function(event) {\n that.resize();\n that.draw();\n }, false);\n\n this.invokeCallback();\n this.resize();\n this.draw();\n}\n\nCanvasControl.prototype.invokeCallback = function() {\n if (this._callbackFunc !== undefined) {\n this._callbackFunc(this._elements);\n }\n};\n\nCanvasControl.prototype.resize = function() {\n let canvasWidth = this._canvas.parentNode.clientWidth;\n let maxCanvasSize = 480;\n if (canvasWidth > maxCanvasSize) {\n canvasWidth = maxCanvasSize;\n }\n this._canvas.width = canvasWidth;\n this._canvas.height = canvasWidth;\n};\n\nCanvasControl.prototype.draw = function() {\n this._context.globalAlpha = 1;\n this._context.clearRect(0, 0, this._canvas.width, this._canvas.height);\n\n this._context.lineWidth = 5;\n this._context.strokeStyle = '#bbb';\n this._context.strokeRect(0, 0, canvas.width, canvas.height);\n\n for (let i = 0; i < this._elements.length; i++) {\n let icon = document.getElementById(this._elements[i].icon);\n if (icon !== undefined) {\n let radiusInPixels = this._elements[i].radius * this._canvas.width;\n let x = this._elements[i].x * this._canvas.width - radiusInPixels;\n let y = this._elements[i].y * this._canvas.height - radiusInPixels;\n this._context.globalAlpha = this._elements[i].alpha;\n this._context.drawImage(\n icon, x, y, radiusInPixels * 2, radiusInPixels * 2);\n }\n }\n};\n\nCanvasControl.prototype.getCursorPosition = function(event) {\n let cursorX;\n let cursorY;\n let rect = this._canvas.getBoundingClientRect();\n if (event.touches !== undefined) {\n cursorX = event.touches[0].clientX;\n cursorY = event.touches[0].clientY;\n } else {\n cursorX = event.clientX;\n cursorY = event.clientY;\n }\n return {\n x: cursorX - rect.left,\n y: cursorY - rect.top,\n };\n};\n\nCanvasControl.prototype.getNearestElement = function(cursorPosition) {\n let minDistance = 1e8;\n let minIndex = -1;\n let minXOffset = 0;\n let minYOffset = 0;\n for (let i = 0; i < this._elements.length; i++) {\n if (this._elements[i].clickable == true) {\n let dx = this._elements[i].x * this._canvas.width - cursorPosition.x;\n let dy = this._elements[i].y * this._canvas.height - cursorPosition.y;\n let distance = Math.abs(dx) + Math.abs(dy); // Manhattan distance.\n if (distance < minDistance &&\n distance < 2 * this._elements[i].radius * this._canvas.width) {\n minDistance = distance;\n minIndex = i;\n minXOffset = dx;\n minYOffset = dy;\n }\n }\n }\n return {\n index: minIndex,\n xOffset: minXOffset,\n yOffset: minYOffset,\n };\n};\n\nCanvasControl.prototype._cursorUpdateFunc = function(cursorPosition) {\n if (this._selected.index > -1) {\n this._elements[this._selected.index].x = Math.max(0, Math.min(1,\n (cursorPosition.x + this._selected.xOffset) / this._canvas.width));\n this._elements[this._selected.index].y = Math.max(0, Math.min(1,\n (cursorPosition.y + this._selected.yOffset) / this._canvas.height));\n this.invokeCallback();\n }\n this.draw();\n};\n\nCanvasControl.prototype._cursorDownFunc = function(event) {\n this._cursorDown = true;\n let cursorPosition = this.getCursorPosition(event);\n this._selected = this.getNearestElement(cursorPosition);\n this._cursorUpdateFunc(cursorPosition);\n document.body.style = 'overflow: hidden;';\n};\n\nCanvasControl.prototype._cursorUpFunc = function(event) {\n this._cursorDown = false;\n this._selected.index = -1;\n document.body.style = '';\n};\n\nCanvasControl.prototype._cursorMoveFunc = function(event) {\n let cursorPosition = this.getCursorPosition(event);\n let selection = this.getNearestElement(cursorPosition);\n if (this._cursorDown == true) {\n this._cursorUpdateFunc(cursorPosition);\n }\n if (selection.index > -1) {\n this._canvas.style.cursor = 'pointer';\n return true;\n } else {\n this._canvas.style.cursor = 'default';\n return false;\n }\n};\n" }, { "path": "examples/resources/js/hello-world.js", "content": "let audioContext;\nlet scene;\nlet audioElement;\nlet audioElementSource;\nlet source;\nlet audioReady = false;\n\n/**\n * @private\n */\nfunction initAudio() {\n audioContext = new (window.AudioContext || window.webkitAudioContext);\n\n // Create a (1st-order Ambisonic) ResonanceAudio scene.\n scene = new ResonanceAudio(audioContext);\n\n // Send scene's rendered binaural output to stereo out.\n scene.output.connect(audioContext.destination);\n\n // Set room acoustics properties.\n let dimensions = {\n width: 3.1,\n height: 2.5,\n depth: 3.4,\n };\n let materials = {\n left: 'brick-bare',\n right: 'curtain-heavy',\n front: 'marble',\n back: 'glass-thin',\n down: 'grass',\n up: 'transparent',\n };\n scene.setRoomProperties(dimensions, materials);\n\n // Create an audio element. Feed into audio graph.\n audioElement = document.createElement('audio');\n audioElement.src = 'resources/cube-sound.wav';\n audioElement.crossOrigin = 'anonymous';\n audioElement.load();\n audioElement.loop = true;\n\n audioElementSource = audioContext.createMediaElementSource(audioElement);\n\n // Create a Source, connect desired audio input to it.\n source = scene.createSource();\n audioElementSource.connect(source.input);\n\n // The source position is relative to the origin\n // (center of the room).\n source.setPosition(-0.707, -0.707, 0);\n\n audioReady = true;\n}\n\nlet onLoad = function() {\n // Initialize play button functionality.\n let sourcePlayback = document.getElementById('sourceButton');\n sourcePlayback.onclick = function(event) {\n switch (event.target.textContent) {\n case 'Play': {\n if (!audioReady) {\n initAudio();\n }\n event.target.textContent = 'Pause';\n audioElement.play();\n }\n break;\n case 'Pause': {\n event.target.textContent = 'Play';\n audioElement.pause();\n }\n break;\n }\n };\n\n let canvas = document.getElementById('canvas');\n let elements = [\n {\n icon: 'sourceIcon',\n x: 0.25,\n y: 0.25,\n radius: 0.04,\n alpha: 0.333,\n clickable: false,\n },\n {\n icon: 'listenerIcon',\n x: 0.5,\n y: 0.5,\n radius: 0.04,\n alpha: 0.333,\n clickable: false,\n },\n ];\n new CanvasControl(canvas, elements);\n};\nwindow.addEventListener('load', onLoad);\n" }, { "path": "examples/resources/js/room-models.js", "content": "let audioContext;\nlet canvasControl;\nlet scene;\nlet audioElements = [];\nlet soundSources = [];\nlet sourceIds = ['sourceAButton', 'sourceBButton', 'sourceCButton'];\nlet dimensions = {\n small: {\n width: 1.5, height: 2.4, depth: 1.3,\n },\n medium: {\n width: 4, height: 3.2, depth: 3.9,\n },\n large: {\n width: 8, height: 3.4, depth: 9,\n },\n huge: {\n width: 20, height: 10, depth: 20,\n },\n};\nlet materials = {\n brick: {\n left: 'brick-bare', right: 'brick-bare',\n up: 'brick-bare', down: 'wood-panel',\n front: 'brick-bare', back: 'brick-bare',\n },\n curtains: {\n left: 'curtain-heavy', right: 'curtain-heavy',\n up: 'wood-panel', down: 'wood-panel',\n front: 'curtain-heavy', back: 'curtain-heavy',\n },\n marble: {\n left: 'marble', right: 'marble',\n up: 'marble', down: 'marble',\n front: 'marble', back: 'marble',\n },\n outside: {\n left: 'transparent', right: 'transparent',\n up: 'transparent', down: 'grass',\n front: 'transparent', back: 'transparent',\n },\n};\nlet dimensionSelection = 'small';\nlet materialSelection = 'brick';\nlet audioReady = false;\n\n/**\n * @private\n */\nfunction selectRoomProperties() {\n if (!audioReady)\n return;\n\n dimensionSelection =\n document.getElementById('roomDimensionsSelect').value;\n materialSelection =\n document.getElementById('roomMaterialsSelect').value;\n scene.setRoomProperties(dimensions[dimensionSelection],\n materials[materialSelection]);\n canvasControl.invokeCallback();\n}\n\n/**\n * @param {Object} elements\n * @private\n */\nfunction updatePositions(elements) {\n if (!audioReady)\n return;\n\n for (let i = 0; i < elements.length; i++) {\n let x = (elements[i].x - 0.5) * dimensions[dimensionSelection].width / 2;\n let y = 0;\n let z = (elements[i].y - 0.5) * dimensions[dimensionSelection].depth / 2;\n if (i < elements.length - 1) {\n soundSources[i].setPosition(x, y, z);\n } else {\n scene.setListenerPosition(x, y, z);\n }\n }\n}\n\n/**\n * @private\n */\nfunction initAudio() {\n audioContext = new (window.AudioContext || window.webkitAudioContext);\n let audioSources = [\n 'resources/cube-sound.wav',\n 'resources/speech-sample.wav',\n 'resources/music.wav',\n ];\n let audioElementSources = [];\n for (let i = 0; i < audioSources.length; i++) {\n audioElements[i] = document.createElement('audio');\n audioElements[i].src = audioSources[i];\n audioElements[i].crossOrigin = 'anonymous';\n audioElements[i].load();\n audioElements[i].loop = true;\n audioElementSources[i] =\n audioContext.createMediaElementSource(audioElements[i]);\n }\n\n // Initialize scene and create Source(s).\n scene = new ResonanceAudio(audioContext, {\n ambisonicOrder: 1,\n });\n for (let i = 0; i < audioSources.length; i++) {\n soundSources[i] = scene.createSource();\n audioElementSources[i].connect(soundSources[i].input);\n }\n scene.output.connect(audioContext.destination);\n\n audioReady = true;\n}\n\nlet onLoad = function() {\n // Initialize play button functionality.\n for (let i = 0; i < sourceIds.length; i++) {\n let button = document.getElementById(sourceIds[i]);\n button.addEventListener('click', function(event) {\n switch (event.target.textContent) {\n case 'Play': {\n if (!audioReady) {\n initAudio();\n }\n event.target.textContent = 'Pause';\n audioElements[i].play();\n }\n break;\n case 'Pause': {\n event.target.textContent = 'Play';\n audioElements[i].pause();\n }\n break;\n }\n });\n }\n\n document.getElementById('roomDimensionsSelect').addEventListener(\n 'change', function(event) {\n selectRoomProperties();\n });\n\n document.getElementById('roomMaterialsSelect').addEventListener(\n 'change', function(event) {\n selectRoomProperties();\n });\n\n let canvas = document.getElementById('canvas');\n let elements = [\n {\n icon: 'sourceAIcon',\n x: 0.25,\n y: 0.25,\n radius: 0.04,\n alpha: 0.75,\n clickable: true,\n },\n {\n icon: 'sourceBIcon',\n x: 0.75,\n y: 0.25,\n radius: 0.04,\n alpha: 0.75,\n clickable: true,\n },\n {\n icon: 'sourceCIcon',\n x: 0.25,\n y: 0.75,\n radius: 0.04,\n alpha: 0.75,\n clickable: true,\n },\n {\n icon: 'listenerIcon',\n x: 0.5,\n y: 0.5,\n radius: 0.04,\n alpha: 0.75,\n clickable: true,\n },\n ];\n canvasControl = new CanvasControl(canvas, elements, updatePositions);\n\n selectRoomProperties();\n};\nwindow.addEventListener('load', onLoad);\n" }, { "path": "examples/resources/js/treasure-hunt.js", "content": "let audioContext;\nlet audioElement;\nlet htmlElement;\nlet renderer;\nlet visualScene;\nlet camera;\nlet mesh;\nlet isCursorDown = false;\nlet cursorDown;\nlet screenPercentToHorizontalAngleSpeed = 90;\nlet screenPercentToVerticalAngleSpeed = 90;\nlet azimuth = 0;\nlet elevation = 0;\nlet clickTime = 0;\nlet audioScene;\nlet source;\nlet dimensions = {\n width: 10, height: 7, depth: 10,\n};\nlet materials = {\n left: 'uniform', right: 'uniform',\n front: 'uniform', back: 'uniform',\n up: 'uniform', down: 'uniform',\n};\nlet defaultSourceRadius = 3;\nlet useDragControls = true;\nlet alphaInit = 0;\nlet betaInit = 0;\nlet gammaInit = 0;\nlet lastMatrixUpdate = 0;\nlet audioReady = false;\nlet cursorStayStill = false;\n\n/**\n * Compute rotation matrix.\n * @param {Number} xAngle\n * @param {Number} yAngle\n * @param {Number} zAngle\n * @private\n */\nfunction updateAngles(xAngle, yAngle, zAngle) {\n let deg2rad = Math.PI / 180;\n let euler = new THREE.Euler(\n xAngle * deg2rad,\n yAngle * deg2rad,\n zAngle * deg2rad,\n 'YXZ');\n let matrix = new THREE.Matrix4().makeRotationFromEuler(euler);\n camera.setRotationFromMatrix(matrix);\n if (!audioReady)\n return;\n\n if (Date.now() - lastMatrixUpdate > 100) {\n audioScene.setListenerFromMatrix(camera.matrixWorld);\n }\n}\n\n/**\n * Get cursor position on canvas.\n * @param {Object} event\n * @return {Object}\n * @private\n */\nfunction getCursorPosition(event) {\n let cursorX;\n let cursorY;\n let rect = htmlElement.getBoundingClientRect();\n if (event.touches !== undefined) {\n cursorX = event.touches[0].clientX;\n cursorY = event.touches[0].clientY;\n } else {\n cursorX = event.clientX;\n cursorY = event.clientY;\n }\n return {\n x: cursorX - rect.left,\n y: cursorY - rect.top,\n };\n}\n\n/**\n * @param {Object} event\n * @private\n */\nfunction cursorDownFunc(event) {\n cursorDown = getCursorPosition(event);\n isCursorDown = true;\n document.body.style = 'overflow: hidden;';\n cursorStayStill = true;\n}\n\n/**\n * @param {Object} event\n * @private\n */\nfunction cursorMoveFunc(event) {\n if (isCursorDown) {\n let rect = htmlElement.getBoundingClientRect();\n let cursorMove = getCursorPosition(event);\n if (Math.abs(cursorMove.x) > 1 || Math.abs(cursorMove.y) > 1) {\n let cursorDiff = {\n x: (cursorMove.x - cursorDown.x) / rect.width,\n y: (cursorMove.y - cursorDown.y) / rect.height,\n };\n cursorDown = cursorMove;\n azimuth += cursorDiff.x * screenPercentToHorizontalAngleSpeed;\n elevation += cursorDiff.y * screenPercentToVerticalAngleSpeed;\n if (elevation > 90) {\n elevation = 90;\n }\n if (elevation < -90) {\n elevation = -90;\n }\n azimuth = azimuth % 360;\n cursorStayStill = false;\n }\n }\n}\n\n/**\n * @param {Object} event\n * @private\n */\nfunction cursorUpFunc(event) {\n isCursorDown = false;\n document.body.style = '';\n if (cursorStayStill) {\n if (clickTime == 0) {\n clickTime = Date.now();\n } else {\n if (Date.now() - clickTime < 800) {\n clickTime = 0;\n moveSource();\n } else {\n clickTime = Date.now();\n }\n }\n }\n cursorStayStill = false;\n}\n\n/**\n * @private\n */\nfunction moveSource() {\n let randomAzimuth = Math.random() * 2 * Math.PI;\n let randomElevation = Math.acos(2 * Math.random() - 1);\n let x =\n Math.cos(randomAzimuth) * Math.sin(randomElevation) * defaultSourceRadius;\n let y = Math.cos(randomElevation) * defaultSourceRadius;\n let z =\n Math.sin(randomAzimuth) * Math.sin(randomElevation) * defaultSourceRadius;\n mesh.position.set(x, y, z);\n if (!audioReady)\n return;\n\n source.setPosition(x, y, z);\n}\n\nlet prevTime = performance.now();\nconst rotateSpeed = 1;\n/**\n * @private\n */\nfunction animate() {\n if (useDragControls) {\n updateAngles(elevation, azimuth, 0);\n }\n\n let currTime = performance.now();\n let deltaTime = (currTime - prevTime) / 1000;\n prevTime = currTime;\n\n mesh.rotation.x += rotateSpeed * deltaTime;\n mesh.rotation.y += rotateSpeed * deltaTime;\n\n renderer.render(visualScene, camera);\n}\n\nlet isFullscreen = false;\n/**\n * @private\n */\nfunction resize() {\n let width = htmlElement.parentNode.clientWidth;\n let height = htmlElement.parentNode.clientHeight;\n if (!isFullscreen) {\n height = width;\n }\n renderer.setPixelRatio(window.devicePixelRatio);\n renderer.setSize(width, height);\n camera.aspect = width / height;\n camera.updateProjectionMatrix();\n}\n\n/**\n * @private\n */\nfunction initAudio() {\n // Create audio scene.\n audioContext = new (window.AudioContext || window.webkitAudioContext);\n audioScene = new ResonanceAudio(audioContext, {\n ambisonicOrder: 3,\n dimensions: dimensions,\n materials: materials,\n });\n source = audioScene.createSource();\n audioElement = document.createElement('audio');\n audioElement.src = 'resources/cube-sound.wav';\n audioElement.crossOrigin = 'anonymous';\n audioElement.load();\n audioElement.loop = true;\n audioElementSource =\n audioContext.createMediaElementSource(audioElement);\n audioElementSource.connect(source.input);\n audioScene.output.connect(audioContext.destination);\n source.setPosition(mesh.position.x, mesh.position.y, mesh.position.z);\n audioReady = true;\n}\n\nlet onLoad = function() {\n htmlElement = document.getElementById('renderer');\n\n // Construct the 3D scene.\n visualScene = new THREE.Scene();\n camera = new THREE.PerspectiveCamera(75, 1, 0.1, 100);\n camera.position.set(0, 0, 0);\n\n let room = new THREE.Mesh(\n new THREE.BoxGeometry(\n dimensions.width, dimensions.height, dimensions.depth),\n new THREE.MeshPhongMaterial({\n side: THREE.BackSide,\n })\n );\n visualScene.add(room);\n\n let cameraLight = new THREE.PointLight(0xffffff, 0.9, 100);\n cameraLight.position.set(camera.position.x, camera.position.y,\n camera.position.z);\n visualScene.add(cameraLight);\n\n let ceilingLight = new THREE.DirectionalLight(0xffffff, 0.5);\n ceilingLight.position.set(0, 1, 0);\n visualScene.add(ceilingLight);\n\n mesh = new THREE.Mesh(\n new THREE.BoxGeometry(1, 1, 1),\n new THREE.MeshPhongMaterial({\n color: 0xff0000,\n })\n );\n mesh.position.set(0, 0, -1 * defaultSourceRadius);\n visualScene.add(mesh);\n\n renderer = new THREE.WebGLRenderer({\n antialias: true,\n });\n htmlElement.appendChild(renderer.domElement);\n\n htmlElement.style.cursor = 'pointer';\n htmlElement.addEventListener('touchstart', function(event) {\n cursorDownFunc(event);\n });\n htmlElement.addEventListener('mousedown', function(event) {\n cursorDownFunc(event);\n });\n window.addEventListener('touchmove', function(event) {\n clickTime = 0;\n cursorMoveFunc(event);\n }, true);\n window.addEventListener('mousemove', function(event) {\n clickTime = 0;\n cursorMoveFunc(event);\n }, true);\n window.addEventListener('touchend', function(event) {\n cursorUpFunc(event);\n });\n window.addEventListener('mouseup', function(event) {\n if (window.getSelection) {\n window.getSelection().removeAllRanges();\n }\n if (document.selection) {\n document.selection.empty();\n }\n cursorUpFunc(event);\n });\n // window.addEventListener('deviceorientation', function(event) {\n // if (event.alpha == null || event.beta == null || event.gamma == null) {\n // return false;\n // }\n\n // if (useDragControls) {\n // alphaInit = event.alpha;\n // betaInit = event.beta;\n // gammaInit = event.gamma;\n // useDragControls = false;\n // }\n // updateAngles(event.beta - betaInit, event.alpha - alphaInit,\n // -(event.gamma - gammaInit));\n // }, false);\n renderer.animate(animate);\n\n resize();\n\n let button = document.getElementById('sourceButton');\n let buttonContainer = document.getElementById('buttonContainer');\n let goFullscreenIcon = document.getElementById('goFullscreenIcon');\n let exitFullscreenIcon = document.getElementById('exitFullscreenIcon');\n button.addEventListener('click', function(event) {\n switch (event.target.textContent) {\n case 'Go Fullscreen': {\n if (!audioReady) {\n initAudio();\n }\n audioElement.play();\n button.textContent = 'Exit Fullscreen';\n htmlElement.parentNode.className = 'fullscreen';\n buttonContainer.className = 'fullscreenContainer';\n goFullscreenIcon.hidden = true;\n exitFullscreenIcon.hidden = false;\n let buttonContainerWidth = buttonContainer.clientWidth;\n buttonContainer.style.marginLeft =\n '-' + buttonContainerWidth / 2 + 'px';\n isFullscreen = true;\n resize();\n }\n break;\n case 'Exit Fullscreen': {\n button.textContent = 'Go Fullscreen';\n audioElement.pause();\n htmlElement.parentNode.className = '';\n buttonContainer.className = '';\n goFullscreenIcon.hidden = false;\n exitFullscreenIcon.hidden = true;\n buttonContainer.style.marginLeft = '0px';\n isFullscreen = false;\n resize();\n }\n }\n });\n window.addEventListener('resize', function(event) {\n resize();\n }, false);\n};\nwindow.addEventListener('load', onLoad);\n" }, { "path": "examples/resources/js/vs-pannernode.js", "content": "let audioContext;\nlet audioElement;\nlet audioElementSource;\nlet foaSource;\nlet toaSource;\nlet pannerNode;\nlet foaScene;\nlet toaScene;\nlet noneGain;\nlet pannerGain;\nlet foaGain;\nlet toaGain;\nlet dimensions = {width: 1, height: 1, depth: 1};\nlet audioReady = false;\n\n/**\n * Select the desired rendering mode.\n * @param {Object} event\n * @private\n */\nfunction selectRenderingMode(event) {\n if (!audioReady)\n return;\n\n switch (document.getElementById('renderingMode').value) {\n case 'toa':\n {\n noneGain.gain.value = 0;\n pannerGain.gain.value = 0;\n foaGain.gain.value = 0;\n toaGain.gain.value = 1;\n }\n break;\n case 'foa':\n {\n noneGain.gain.value = 0;\n pannerGain.gain.value = 0;\n foaGain.gain.value = 1;\n toaGain.gain.value = 0;\n }\n break;\n case 'panner-node':\n {\n noneGain.gain.value = 0;\n pannerGain.gain.value = 1;\n foaGain.gain.value = 0;\n toaGain.gain.value = 0;\n }\n break;\n case 'none':\n default:\n {\n noneGain.gain.value = 1;\n pannerGain.gain.value = 0;\n foaGain.gain.value = 0;\n toaGain.gain.value = 0;\n }\n break;\n }\n}\n\n/**\n * Update the audio sound objects' positions.\n * @param {Object} elements\n * @private\n */\nfunction updatePositions(elements) {\n if (!audioReady)\n return;\n\n for (let i = 0; i < elements.length; i++) {\n let x = (elements[i].x - 0.5) * dimensions.width / 2;\n let y = 0;\n let z = (elements[i].y - 0.5) * dimensions.depth / 2;\n if (i == 0) {\n pannerNode.setPosition(x, y, z);\n foaSource.setPosition(x, y, z);\n toaSource.setPosition(x, y, z);\n } else {\n audioContext.listener.setPosition(x, y, z);\n foaScene.setListenerPosition(x, y, z);\n toaScene.setListenerPosition(x, y, z);\n }\n }\n}\n\n/**\n * @private\n */\nfunction initAudio() {\n // Create