{"version":3,"file":"wavesurfer.min.js","sources":["../src/wavesurfer.js"],"sourcesContent":["/*!\n * wavesurfer.js 3.3.3 (2020-04-16)\n * https://github.com/katspaugh/wavesurfer.js\n * @license BSD-3-Clause\n */\n(function webpackUniversalModuleDefinition(root, factory) {\n if(typeof exports === 'object' && typeof module === 'object')\n module.exports = factory();\n else if(typeof define === 'function' && define.amd)\n define([], factory);\n else if(typeof exports === 'object')\n exports[\"WaveSurfer\"] = factory();\n else\n root[\"WaveSurfer\"] = factory();\n})(window, function() {\n return /******/ (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, { enumerable: true, get: getter });\n /******/ \t\t}\n /******/ \t};\n /******/\n /******/ \t// define __esModule on exports\n /******/ \t__webpack_require__.r = function(exports) {\n /******/ \t\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n /******/ \t\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n /******/ \t\t}\n /******/ \t\tObject.defineProperty(exports, '__esModule', { value: true });\n /******/ \t};\n /******/\n /******/ \t// create a fake namespace object\n /******/ \t// mode & 1: value is a module id, require it\n /******/ \t// mode & 2: merge all properties of value into the ns\n /******/ \t// mode & 4: return value when already ns object\n /******/ \t// mode & 8|1: behave like require\n /******/ \t__webpack_require__.t = function(value, mode) {\n /******/ \t\tif(mode & 1) value = __webpack_require__(value);\n /******/ \t\tif(mode & 8) return value;\n /******/ \t\tif((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;\n /******/ \t\tvar ns = Object.create(null);\n /******/ \t\t__webpack_require__.r(ns);\n /******/ \t\tObject.defineProperty(ns, 'default', { enumerable: true, value: value });\n /******/ \t\tif(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n /******/ \t\treturn ns;\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 /******/\n /******/ \t// Load entry module and return exports\n /******/ \treturn __webpack_require__(__webpack_require__.s = \"./src/wavesurfer.js\");\n /******/ })\n /************************************************************************/\n /******/ ({\n\n /***/ \"./node_modules/debounce/index.js\":\n /*!****************************************!*\\\n !*** ./node_modules/debounce/index.js ***!\n \\****************************************/\n /*! no static exports found */\n /***/ (function(module, exports) {\n\n /**\n * Returns a function, that, as long as it continues to be invoked, will not\n * be triggered. The function will be called after it stops being called for\n * N milliseconds. If `immediate` is passed, trigger the function on the\n * leading edge, instead of the trailing. The function also has a property 'clear'\n * that is a function which will clear the timer to prevent previously scheduled executions.\n *\n * @source underscore.js\n * @see http://unscriptable.com/2009/03/20/debouncing-javascript-methods/\n * @param {Function} function to wrap\n * @param {Number} timeout in ms (`100`)\n * @param {Boolean} whether to execute at the beginning (`false`)\n * @api public\n */\n function debounce(func, wait, immediate){\n var timeout, args, context, timestamp, result;\n if (null == wait) wait = 100;\n\n function later() {\n var last = Date.now() - timestamp;\n\n if (last < wait && last >= 0) {\n timeout = setTimeout(later, wait - last);\n } else {\n timeout = null;\n if (!immediate) {\n result = func.apply(context, args);\n context = args = null;\n }\n }\n };\n\n var debounced = function(){\n context = this;\n args = arguments;\n timestamp = Date.now();\n var callNow = immediate && !timeout;\n if (!timeout) timeout = setTimeout(later, wait);\n if (callNow) {\n result = func.apply(context, args);\n context = args = null;\n }\n\n return result;\n };\n\n debounced.clear = function() {\n if (timeout) {\n clearTimeout(timeout);\n timeout = null;\n }\n };\n\n debounced.flush = function() {\n if (timeout) {\n result = func.apply(context, args);\n context = args = null;\n\n clearTimeout(timeout);\n timeout = null;\n }\n };\n\n return debounced;\n };\n\n// Adds compatibility for ES modules\n debounce.debounce = debounce;\n\n module.exports = debounce;\n\n\n /***/ }),\n\n /***/ \"./src/drawer.canvasentry.js\":\n /*!***********************************!*\\\n !*** ./src/drawer.canvasentry.js ***!\n \\***********************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n var _style = _interopRequireDefault(__webpack_require__(/*! ./util/style */ \"./src/util/style.js\"));\n\n var _getId = _interopRequireDefault(__webpack_require__(/*! ./util/get-id */ \"./src/util/get-id.js\"));\n\n function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n /**\n * The `CanvasEntry` class represents an element consisting of a wave `canvas`\n * and an (optional) progress wave `canvas`.\n *\n * The `MultiCanvas` renderer uses one or more `CanvasEntry` instances to\n * render a waveform, depending on the zoom level.\n */\n var CanvasEntry =\n /*#__PURE__*/\n function () {\n function CanvasEntry() {\n _classCallCheck(this, CanvasEntry);\n\n /**\n * The wave node\n *\n * @type {HTMLCanvasElement}\n */\n this.wave = null;\n /**\n * The wave canvas rendering context\n *\n * @type {CanvasRenderingContext2D}\n */\n\n this.waveCtx = null;\n /**\n * The (optional) progress wave node\n *\n * @type {HTMLCanvasElement}\n */\n\n this.progress = null;\n /**\n * The (optional) progress wave canvas rendering context\n *\n * @type {CanvasRenderingContext2D}\n */\n\n this.progressCtx = null;\n /**\n * Start of the area the canvas should render, between 0 and 1\n *\n * @type {number}\n * @private\n */\n\n this.start = 0;\n /**\n * End of the area the canvas should render, between 0 and 1\n *\n * @type {number}\n * @private\n */\n\n this.end = 1;\n /**\n * Unique identifier for this entry\n *\n * @type {string}\n */\n\n this.id = (0, _getId.default)(typeof this.constructor.name !== 'undefined' ? this.constructor.name.toLowerCase() + '_' : 'canvasentry_');\n /**\n * Canvas 2d context attributes\n *\n * @type {object}\n */\n\n this.canvasContextAttributes = {};\n }\n /**\n * Store the wave canvas element and create the 2D rendering context\n *\n * @param {HTMLCanvasElement} element The wave `canvas` element.\n */\n\n\n _createClass(CanvasEntry, [{\n key: \"initWave\",\n value: function initWave(element) {\n this.wave = element;\n this.waveCtx = this.wave.getContext('2d', this.canvasContextAttributes);\n }\n /**\n * Store the progress wave canvas element and create the 2D rendering\n * context\n *\n * @param {HTMLCanvasElement} element The progress wave `canvas` element.\n */\n\n }, {\n key: \"initProgress\",\n value: function initProgress(element) {\n this.progress = element;\n this.progressCtx = this.progress.getContext('2d', this.canvasContextAttributes);\n }\n /**\n * Update the dimensions\n *\n * @param {number} elementWidth Width of the entry\n * @param {number} totalWidth Total width of the multi canvas renderer\n * @param {number} width The new width of the element\n * @param {number} height The new height of the element\n */\n\n }, {\n key: \"updateDimensions\",\n value: function updateDimensions(elementWidth, totalWidth, width, height) {\n // where the canvas starts and ends in the waveform, represented as a\n // decimal between 0 and 1\n this.start = this.wave.offsetLeft / totalWidth || 0;\n this.end = this.start + elementWidth / totalWidth; // set wave canvas dimensions\n\n this.wave.width = width;\n this.wave.height = height;\n var elementSize = {\n width: elementWidth + 'px'\n };\n (0, _style.default)(this.wave, elementSize);\n\n if (this.hasProgressCanvas) {\n // set progress canvas dimensions\n this.progress.width = width;\n this.progress.height = height;\n (0, _style.default)(this.progress, elementSize);\n }\n }\n /**\n * Clear the wave and progress rendering contexts\n */\n\n }, {\n key: \"clearWave\",\n value: function clearWave() {\n // wave\n this.waveCtx.clearRect(0, 0, this.waveCtx.canvas.width, this.waveCtx.canvas.height); // progress\n\n if (this.hasProgressCanvas) {\n this.progressCtx.clearRect(0, 0, this.progressCtx.canvas.width, this.progressCtx.canvas.height);\n }\n }\n /**\n * Set the fill styles for wave and progress\n *\n * @param {string} waveColor Fill color for the wave canvas\n * @param {?string} progressColor Fill color for the progress canvas\n */\n\n }, {\n key: \"setFillStyles\",\n value: function setFillStyles(waveColor, progressColor) {\n this.waveCtx.fillStyle = waveColor;\n\n if (this.hasProgressCanvas) {\n this.progressCtx.fillStyle = progressColor;\n }\n }\n /**\n * Draw a rectangle for wave and progress\n *\n * @param {number} x X start position\n * @param {number} y Y start position\n * @param {number} width Width of the rectangle\n * @param {number} height Height of the rectangle\n * @param {number} radius Radius of the rectangle\n */\n\n }, {\n key: \"fillRects\",\n value: function fillRects(x, y, width, height, radius) {\n this.fillRectToContext(this.waveCtx, x, y, width, height, radius);\n\n if (this.hasProgressCanvas) {\n this.fillRectToContext(this.progressCtx, x, y, width, height, radius);\n }\n }\n /**\n * Draw the actual rectangle on a `canvas` element\n *\n * @private\n * @param {CanvasRenderingContext2D} ctx Rendering context of target canvas\n * @param {number} x X start position\n * @param {number} y Y start position\n * @param {number} width Width of the rectangle\n * @param {number} height Height of the rectangle\n * @param {number} radius Radius of the rectangle\n */\n\n }, {\n key: \"fillRectToContext\",\n value: function fillRectToContext(ctx, x, y, width, height, radius) {\n if (!ctx) {\n return;\n }\n\n if (radius) {\n this.drawRoundedRect(ctx, x, y, width, height, radius);\n } else {\n ctx.fillRect(x, y, width, height);\n }\n }\n /**\n * Draw a rounded rectangle on Canvas\n *\n * @private\n * @param {CanvasRenderingContext2D} ctx Canvas context\n * @param {number} x X-position of the rectangle\n * @param {number} y Y-position of the rectangle\n * @param {number} width Width of the rectangle\n * @param {number} height Height of the rectangle\n * @param {number} radius Radius of the rectangle\n *\n * @return {void}\n * @example drawRoundedRect(ctx, 50, 50, 5, 10, 3)\n */\n\n }, {\n key: \"drawRoundedRect\",\n value: function drawRoundedRect(ctx, x, y, width, height, radius) {\n if (height === 0) {\n return;\n } // peaks are float values from -1 to 1. Use absolute height values in\n // order to correctly calculate rounded rectangle coordinates\n\n\n if (height < 0) {\n height *= -1;\n y -= height;\n }\n\n ctx.beginPath();\n ctx.moveTo(x + radius, y);\n ctx.lineTo(x + width - radius, y);\n ctx.quadraticCurveTo(x + width, y, x + width, y + radius);\n ctx.lineTo(x + width, y + height - radius);\n ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);\n ctx.lineTo(x + radius, y + height);\n ctx.quadraticCurveTo(x, y + height, x, y + height - radius);\n ctx.lineTo(x, y + radius);\n ctx.quadraticCurveTo(x, y, x + radius, y);\n ctx.closePath();\n ctx.fill();\n }\n /**\n * Render the actual wave and progress lines\n *\n * @param {number[]} peaks Array with peaks data\n * @param {number} absmax Maximum peak value (absolute)\n * @param {number} halfH Half the height of the waveform\n * @param {number} offsetY Offset to the top\n * @param {number} start The x-offset of the beginning of the area that\n * should be rendered\n * @param {number} end The x-offset of the end of the area that\n * should be rendered\n */\n\n }, {\n key: \"drawLines\",\n value: function drawLines(peaks, absmax, halfH, offsetY, start, end) {\n this.drawLineToContext(this.waveCtx, peaks, absmax, halfH, offsetY, start, end);\n\n if (this.hasProgressCanvas) {\n this.drawLineToContext(this.progressCtx, peaks, absmax, halfH, offsetY, start, end);\n }\n }\n /**\n * Render the actual waveform line on a `canvas` element\n *\n * @private\n * @param {CanvasRenderingContext2D} ctx Rendering context of target canvas\n * @param {number[]} peaks Array with peaks data\n * @param {number} absmax Maximum peak value (absolute)\n * @param {number} halfH Half the height of the waveform\n * @param {number} offsetY Offset to the top\n * @param {number} start The x-offset of the beginning of the area that\n * should be rendered\n * @param {number} end The x-offset of the end of the area that\n * should be rendered\n */\n\n }, {\n key: \"drawLineToContext\",\n value: function drawLineToContext(ctx, peaks, absmax, halfH, offsetY, start, end) {\n if (!ctx) {\n return;\n }\n\n var length = peaks.length / 2;\n var first = Math.round(length * this.start); // use one more peak value to make sure we join peaks at ends -- unless,\n // of course, this is the last canvas\n\n var last = Math.round(length * this.end) + 1;\n var canvasStart = first;\n var canvasEnd = last;\n var scale = this.wave.width / (canvasEnd - canvasStart - 1); // optimization\n\n var halfOffset = halfH + offsetY;\n var absmaxHalf = absmax / halfH;\n ctx.beginPath();\n ctx.moveTo((canvasStart - first) * scale, halfOffset);\n ctx.lineTo((canvasStart - first) * scale, halfOffset - Math.round((peaks[2 * canvasStart] || 0) / absmaxHalf));\n var i, peak, h;\n\n for (i = canvasStart; i < canvasEnd; i++) {\n peak = peaks[2 * i] || 0;\n h = Math.round(peak / absmaxHalf);\n ctx.lineTo((i - first) * scale + this.halfPixel, halfOffset - h);\n } // draw the bottom edge going backwards, to make a single\n // closed hull to fill\n\n\n var j = canvasEnd - 1;\n\n for (j; j >= canvasStart; j--) {\n peak = peaks[2 * j + 1] || 0;\n h = Math.round(peak / absmaxHalf);\n ctx.lineTo((j - first) * scale + this.halfPixel, halfOffset - h);\n }\n\n ctx.lineTo((canvasStart - first) * scale, halfOffset - Math.round((peaks[2 * canvasStart + 1] || 0) / absmaxHalf));\n ctx.closePath();\n ctx.fill();\n }\n /**\n * Destroys this entry\n */\n\n }, {\n key: \"destroy\",\n value: function destroy() {\n this.waveCtx = null;\n this.wave = null;\n this.progressCtx = null;\n this.progress = null;\n }\n /**\n * Return image data of the wave `canvas` element\n *\n * When using a `type` of `'blob'`, this will return a `Promise` that\n * resolves with a `Blob` instance.\n *\n * @param {string} format='image/png' An optional value of a format type.\n * @param {number} quality=0.92 An optional value between 0 and 1.\n * @param {string} type='dataURL' Either 'dataURL' or 'blob'.\n * @return {string|Promise} When using the default `'dataURL'` `type` this\n * returns a data URL. When using the `'blob'` `type` this returns a\n * `Promise` that resolves with a `Blob` instance.\n */\n\n }, {\n key: \"getImage\",\n value: function getImage(format, quality, type) {\n var _this = this;\n\n if (type === 'blob') {\n return new Promise(function (resolve) {\n _this.wave.toBlob(resolve, format, quality);\n });\n } else if (type === 'dataURL') {\n return this.wave.toDataURL(format, quality);\n }\n }\n }]);\n\n return CanvasEntry;\n }();\n\n exports.default = CanvasEntry;\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/drawer.js\":\n /*!***********************!*\\\n !*** ./src/drawer.js ***!\n \\***********************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n var util = _interopRequireWildcard(__webpack_require__(/*! ./util */ \"./src/util/index.js\"));\n\n function _getRequireWildcardCache() { if (typeof WeakMap !== \"function\") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }\n\n function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== \"object\" && typeof obj !== \"function\") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }\n\n function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) { return call; } return _assertThisInitialized(self); }\n\n function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return self; }\n\n function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }\n\n function _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function\"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }\n\n function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }\n\n /**\n * Parent class for renderers\n *\n * @extends {Observer}\n */\n var Drawer =\n /*#__PURE__*/\n function (_util$Observer) {\n _inherits(Drawer, _util$Observer);\n\n /**\n * @param {HTMLElement} container The container node of the wavesurfer instance\n * @param {WavesurferParams} params The wavesurfer initialisation options\n */\n function Drawer(container, params) {\n var _this;\n\n _classCallCheck(this, Drawer);\n\n _this = _possibleConstructorReturn(this, _getPrototypeOf(Drawer).call(this));\n /** @private */\n\n _this.container = container;\n /**\n * @type {WavesurferParams}\n * @private\n */\n\n _this.params = params;\n /**\n * The width of the renderer\n * @type {number}\n */\n\n _this.width = 0;\n /**\n * The height of the renderer\n * @type {number}\n */\n\n _this.height = params.height * _this.params.pixelRatio;\n /** @private */\n\n _this.lastPos = 0;\n /**\n * The `` element which is added to the container\n * @type {HTMLElement}\n */\n\n _this.wrapper = null;\n return _this;\n }\n /**\n * Alias of `util.style`\n *\n * @param {HTMLElement} el The element that the styles will be applied to\n * @param {Object} styles The map of propName: attribute, both are used as-is\n * @return {HTMLElement} el\n */\n\n\n _createClass(Drawer, [{\n key: \"style\",\n value: function style(el, styles) {\n return util.style(el, styles);\n }\n /**\n * Create the wrapper `` element, style it and set up the events for\n * interaction\n */\n\n }, {\n key: \"createWrapper\",\n value: function createWrapper() {\n this.wrapper = this.container.appendChild(document.createElement('wave'));\n this.style(this.wrapper, {\n display: 'block',\n position: 'relative',\n userSelect: 'none',\n webkitUserSelect: 'none',\n height: this.params.height + 'px'\n });\n\n if (this.params.fillParent || this.params.scrollParent) {\n this.style(this.wrapper, {\n width: '100%',\n overflowX: this.params.hideScrollbar ? 'hidden' : 'auto',\n overflowY: 'hidden'\n });\n }\n\n this.setupWrapperEvents();\n }\n /**\n * Handle click event\n *\n * @param {Event} e Click event\n * @param {?boolean} noPrevent Set to true to not call `e.preventDefault()`\n * @return {number} Playback position from 0 to 1\n */\n\n }, {\n key: \"handleEvent\",\n value: function handleEvent(e, noPrevent) {\n !noPrevent && e.preventDefault();\n var clientX = e.targetTouches ? e.targetTouches[0].clientX : e.clientX;\n var bbox = this.wrapper.getBoundingClientRect();\n var nominalWidth = this.width;\n var parentWidth = this.getWidth();\n var progress;\n\n if (!this.params.fillParent && nominalWidth < parentWidth) {\n progress = (this.params.rtl ? bbox.right - clientX : clientX - bbox.left) * (this.params.pixelRatio / nominalWidth) || 0;\n\n if (progress > 1) {\n progress = 1;\n }\n } else {\n progress = ((this.params.rtl ? bbox.right - clientX : clientX - bbox.left) + this.wrapper.scrollLeft) / this.wrapper.scrollWidth || 0;\n }\n\n return progress;\n }\n /**\n * @private\n */\n\n }, {\n key: \"setupWrapperEvents\",\n value: function setupWrapperEvents() {\n var _this2 = this;\n\n this.wrapper.addEventListener('click', function (e) {\n var scrollbarHeight = _this2.wrapper.offsetHeight - _this2.wrapper.clientHeight;\n\n if (scrollbarHeight !== 0) {\n // scrollbar is visible. Check if click was on it\n var bbox = _this2.wrapper.getBoundingClientRect();\n\n if (e.clientY >= bbox.bottom - scrollbarHeight) {\n // ignore mousedown as it was on the scrollbar\n return;\n }\n }\n\n if (_this2.params.interact) {\n _this2.fireEvent('click', e, _this2.handleEvent(e));\n }\n });\n this.wrapper.addEventListener('dblclick', function (e) {\n if (_this2.params.interact) {\n _this2.fireEvent('dblclick', e, _this2.handleEvent(e));\n }\n });\n this.wrapper.addEventListener('scroll', function (e) {\n return _this2.fireEvent('scroll', e);\n });\n }\n /**\n * Draw peaks on the canvas\n *\n * @param {number[]|Number.} peaks Can also be an array of arrays\n * for split channel rendering\n * @param {number} length The width of the area that should be drawn\n * @param {number} start The x-offset of the beginning of the area that\n * should be rendered\n * @param {number} end The x-offset of the end of the area that should be\n * rendered\n */\n\n }, {\n key: \"drawPeaks\",\n value: function drawPeaks(peaks, length, start, end) {\n if (!this.setWidth(length)) {\n this.clearWave();\n }\n\n this.params.barWidth ? this.drawBars(peaks, 0, start, end) : this.drawWave(peaks, 0, start, end);\n }\n /**\n * Scroll to the beginning\n */\n\n }, {\n key: \"resetScroll\",\n value: function resetScroll() {\n if (this.wrapper !== null) {\n this.wrapper.scrollLeft = 0;\n }\n }\n /**\n * Recenter the view-port at a certain percent of the waveform\n *\n * @param {number} percent Value from 0 to 1 on the waveform\n */\n\n }, {\n key: \"recenter\",\n value: function recenter(percent) {\n var position = this.wrapper.scrollWidth * percent;\n this.recenterOnPosition(position, true);\n }\n /**\n * Recenter the view-port on a position, either scroll there immediately or\n * in steps of 5 pixels\n *\n * @param {number} position X-offset in pixels\n * @param {boolean} immediate Set to true to immediately scroll somewhere\n */\n\n }, {\n key: \"recenterOnPosition\",\n value: function recenterOnPosition(position, immediate) {\n var scrollLeft = this.wrapper.scrollLeft;\n var half = ~~(this.wrapper.clientWidth / 2);\n var maxScroll = this.wrapper.scrollWidth - this.wrapper.clientWidth;\n var target = position - half;\n var offset = target - scrollLeft;\n\n if (maxScroll == 0) {\n // no need to continue if scrollbar is not there\n return;\n } // if the cursor is currently visible...\n\n\n if (!immediate && -half <= offset && offset < half) {\n // set rate at which waveform is centered\n var rate = this.params.autoCenterRate; // make rate depend on width of view and length of waveform\n\n rate /= half;\n rate *= maxScroll;\n offset = Math.max(-rate, Math.min(rate, offset));\n target = scrollLeft + offset;\n } // limit target to valid range (0 to maxScroll)\n\n\n target = Math.max(0, Math.min(maxScroll, target)); // no use attempting to scroll if we're not moving\n\n if (target != scrollLeft) {\n this.wrapper.scrollLeft = target;\n }\n }\n /**\n * Get the current scroll position in pixels\n *\n * @return {number} Horizontal scroll position in pixels\n */\n\n }, {\n key: \"getScrollX\",\n value: function getScrollX() {\n var x = 0;\n\n if (this.wrapper) {\n var pixelRatio = this.params.pixelRatio;\n x = Math.round(this.wrapper.scrollLeft * pixelRatio); // In cases of elastic scroll (safari with mouse wheel) you can\n // scroll beyond the limits of the container\n // Calculate and floor the scrollable extent to make sure an out\n // of bounds value is not returned\n // Ticket #1312\n\n if (this.params.scrollParent) {\n var maxScroll = ~~(this.wrapper.scrollWidth * pixelRatio - this.getWidth());\n x = Math.min(maxScroll, Math.max(0, x));\n }\n }\n\n return x;\n }\n /**\n * Get the width of the container\n *\n * @return {number} The width of the container\n */\n\n }, {\n key: \"getWidth\",\n value: function getWidth() {\n return Math.round(this.container.clientWidth * this.params.pixelRatio);\n }\n /**\n * Set the width of the container\n *\n * @param {number} width The new width of the container\n * @return {boolean} Whether the width of the container was updated or not\n */\n\n }, {\n key: \"setWidth\",\n value: function setWidth(width) {\n if (this.width == width) {\n return false;\n }\n\n this.width = width;\n\n if (this.params.fillParent || this.params.scrollParent) {\n this.style(this.wrapper, {\n width: ''\n });\n } else {\n this.style(this.wrapper, {\n width: ~~(this.width / this.params.pixelRatio) + 'px'\n });\n }\n\n this.updateSize();\n return true;\n }\n /**\n * Set the height of the container\n *\n * @param {number} height The new height of the container.\n * @return {boolean} Whether the height of the container was updated or not\n */\n\n }, {\n key: \"setHeight\",\n value: function setHeight(height) {\n if (height == this.height) {\n return false;\n }\n\n this.height = height;\n this.style(this.wrapper, {\n height: ~~(this.height / this.params.pixelRatio) + 'px'\n });\n this.updateSize();\n return true;\n }\n /**\n * Called by wavesurfer when progress should be rendered\n *\n * @param {number} progress From 0 to 1\n */\n\n }, {\n key: \"progress\",\n value: function progress(_progress) {\n var minPxDelta = 1 / this.params.pixelRatio;\n var pos = Math.round(_progress * this.width) * minPxDelta;\n\n if (pos < this.lastPos || pos - this.lastPos >= minPxDelta) {\n this.lastPos = pos;\n\n if (this.params.scrollParent && this.params.autoCenter) {\n var newPos = ~~(this.wrapper.scrollWidth * _progress);\n this.recenterOnPosition(newPos, this.params.autoCenterImmediately);\n }\n\n this.updateProgress(pos);\n }\n }\n /**\n * This is called when wavesurfer is destroyed\n */\n\n }, {\n key: \"destroy\",\n value: function destroy() {\n this.unAll();\n\n if (this.wrapper) {\n if (this.wrapper.parentNode == this.container) {\n this.container.removeChild(this.wrapper);\n }\n\n this.wrapper = null;\n }\n }\n /* Renderer-specific methods */\n\n /**\n * Called after cursor related params have changed.\n *\n * @abstract\n */\n\n }, {\n key: \"updateCursor\",\n value: function updateCursor() {}\n /**\n * Called when the size of the container changes so the renderer can adjust\n *\n * @abstract\n */\n\n }, {\n key: \"updateSize\",\n value: function updateSize() {}\n /**\n * Draw a waveform with bars\n *\n * @abstract\n * @param {number[]|Number.} peaks Can also be an array of arrays for split channel\n * rendering\n * @param {number} channelIndex The index of the current channel. Normally\n * should be 0\n * @param {number} start The x-offset of the beginning of the area that\n * should be rendered\n * @param {number} end The x-offset of the end of the area that should be\n * rendered\n */\n\n }, {\n key: \"drawBars\",\n value: function drawBars(peaks, channelIndex, start, end) {}\n /**\n * Draw a waveform\n *\n * @abstract\n * @param {number[]|Number.} peaks Can also be an array of arrays for split channel\n * rendering\n * @param {number} channelIndex The index of the current channel. Normally\n * should be 0\n * @param {number} start The x-offset of the beginning of the area that\n * should be rendered\n * @param {number} end The x-offset of the end of the area that should be\n * rendered\n */\n\n }, {\n key: \"drawWave\",\n value: function drawWave(peaks, channelIndex, start, end) {}\n /**\n * Clear the waveform\n *\n * @abstract\n */\n\n }, {\n key: \"clearWave\",\n value: function clearWave() {}\n /**\n * Render the new progress\n *\n * @abstract\n * @param {number} position X-Offset of progress position in pixels\n */\n\n }, {\n key: \"updateProgress\",\n value: function updateProgress(position) {}\n }]);\n\n return Drawer;\n }(util.Observer);\n\n exports.default = Drawer;\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/drawer.multicanvas.js\":\n /*!***********************************!*\\\n !*** ./src/drawer.multicanvas.js ***!\n \\***********************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n var _drawer = _interopRequireDefault(__webpack_require__(/*! ./drawer */ \"./src/drawer.js\"));\n\n var util = _interopRequireWildcard(__webpack_require__(/*! ./util */ \"./src/util/index.js\"));\n\n var _drawer2 = _interopRequireDefault(__webpack_require__(/*! ./drawer.canvasentry */ \"./src/drawer.canvasentry.js\"));\n\n function _getRequireWildcardCache() { if (typeof WeakMap !== \"function\") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }\n\n function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== \"object\" && typeof obj !== \"function\") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }\n\n function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) { return call; } return _assertThisInitialized(self); }\n\n function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return self; }\n\n function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }\n\n function _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function\"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }\n\n function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }\n\n /**\n * MultiCanvas renderer for wavesurfer. Is currently the default and sole\n * builtin renderer.\n *\n * A `MultiCanvas` consists of one or more `CanvasEntry` instances, depending\n * on the zoom level.\n */\n var MultiCanvas =\n /*#__PURE__*/\n function (_Drawer) {\n _inherits(MultiCanvas, _Drawer);\n\n /**\n * @param {HTMLElement} container The container node of the wavesurfer instance\n * @param {WavesurferParams} params The wavesurfer initialisation options\n */\n function MultiCanvas(container, params) {\n var _this;\n\n _classCallCheck(this, MultiCanvas);\n\n _this = _possibleConstructorReturn(this, _getPrototypeOf(MultiCanvas).call(this, container, params));\n /**\n * @type {number}\n * @private\n */\n\n _this.maxCanvasWidth = params.maxCanvasWidth;\n /**\n * @private\n * @type {number}\n */\n\n _this.maxCanvasElementWidth = Math.round(params.maxCanvasWidth / params.pixelRatio);\n /**\n * Whether or not the progress wave is rendered. If the `waveColor`\n * and `progressColor` are the same color it is not.\n *\n * @type {boolean}\n */\n\n _this.hasProgressCanvas = params.waveColor != params.progressColor;\n /**\n * @private\n * @type {number}\n */\n\n _this.halfPixel = 0.5 / params.pixelRatio;\n /**\n * List of `CanvasEntry` instances.\n *\n * @private\n * @type {Array}\n */\n\n _this.canvases = [];\n /**\n * @private\n * @type {HTMLElement}\n */\n\n _this.progressWave = null;\n /**\n * Class used to generate entries.\n *\n * @private\n * @type {function}\n */\n\n _this.EntryClass = _drawer2.default;\n /**\n * Canvas 2d context attributes.\n *\n * @private\n * @type {object}\n */\n\n _this.canvasContextAttributes = params.drawingContextAttributes;\n /**\n * Overlap added between entries to prevent vertical white stripes\n * between `canvas` elements.\n *\n * @type {number}\n */\n\n _this.overlap = 2 * Math.ceil(params.pixelRatio / 2);\n /**\n * The radius of the wave bars. Makes bars rounded\n *\n * @private\n * @type {number}\n */\n\n _this.barRadius = params.barRadius || 0;\n return _this;\n }\n /**\n * Initialize the drawer\n */\n\n\n _createClass(MultiCanvas, [{\n key: \"init\",\n value: function init() {\n this.createWrapper();\n this.createElements();\n }\n /**\n * Create the canvas elements and style them\n *\n * @private\n */\n\n }, {\n key: \"createElements\",\n value: function createElements() {\n this.progressWave = this.wrapper.appendChild(this.style(document.createElement('wave'), {\n position: 'absolute',\n zIndex: 3,\n left: 0,\n top: 0,\n bottom: 0,\n overflow: 'hidden',\n width: '0',\n display: 'none',\n boxSizing: 'border-box',\n borderRightStyle: 'solid',\n pointerEvents: 'none'\n }));\n this.addCanvas();\n this.updateCursor();\n }\n /**\n * Update cursor style\n */\n\n }, {\n key: \"updateCursor\",\n value: function updateCursor() {\n this.style(this.progressWave, {\n borderRightWidth: this.params.cursorWidth + 'px',\n borderRightColor: this.params.cursorColor\n });\n }\n /**\n * Adjust to the updated size by adding or removing canvases\n */\n\n }, {\n key: \"updateSize\",\n value: function updateSize() {\n var _this2 = this;\n\n var totalWidth = Math.round(this.width / this.params.pixelRatio);\n var requiredCanvases = Math.ceil(totalWidth / (this.maxCanvasElementWidth + this.overlap)); // add required canvases\n\n while (this.canvases.length < requiredCanvases) {\n this.addCanvas();\n } // remove older existing canvases, if any\n\n\n while (this.canvases.length > requiredCanvases) {\n this.removeCanvas();\n }\n\n var canvasWidth = this.maxCanvasWidth + this.overlap;\n var lastCanvas = this.canvases.length - 1;\n this.canvases.forEach(function (entry, i) {\n if (i == lastCanvas) {\n canvasWidth = _this2.width - _this2.maxCanvasWidth * lastCanvas;\n }\n\n _this2.updateDimensions(entry, canvasWidth, _this2.height);\n\n entry.clearWave();\n });\n }\n /**\n * Add a canvas to the canvas list\n *\n * @private\n */\n\n }, {\n key: \"addCanvas\",\n value: function addCanvas() {\n var entry = new this.EntryClass();\n entry.canvasContextAttributes = this.canvasContextAttributes;\n entry.hasProgressCanvas = this.hasProgressCanvas;\n entry.halfPixel = this.halfPixel;\n var leftOffset = this.maxCanvasElementWidth * this.canvases.length; // wave\n\n entry.initWave(this.wrapper.appendChild(this.style(document.createElement('canvas'), {\n position: 'absolute',\n zIndex: 2,\n left: leftOffset + 'px',\n top: 0,\n bottom: 0,\n height: '100%',\n pointerEvents: 'none'\n }))); // progress\n\n if (this.hasProgressCanvas) {\n entry.initProgress(this.progressWave.appendChild(this.style(document.createElement('canvas'), {\n position: 'absolute',\n left: leftOffset + 'px',\n top: 0,\n bottom: 0,\n height: '100%'\n })));\n }\n\n this.canvases.push(entry);\n }\n /**\n * Pop single canvas from the list\n *\n * @private\n */\n\n }, {\n key: \"removeCanvas\",\n value: function removeCanvas() {\n var lastEntry = this.canvases[this.canvases.length - 1]; // wave\n\n lastEntry.wave.parentElement.removeChild(lastEntry.wave); // progress\n\n if (this.hasProgressCanvas) {\n lastEntry.progress.parentElement.removeChild(lastEntry.progress);\n } // cleanup\n\n\n if (lastEntry) {\n lastEntry.destroy();\n lastEntry = null;\n }\n\n this.canvases.pop();\n }\n /**\n * Update the dimensions of a canvas element\n *\n * @private\n * @param {CanvasEntry} entry Target entry\n * @param {number} width The new width of the element\n * @param {number} height The new height of the element\n */\n\n }, {\n key: \"updateDimensions\",\n value: function updateDimensions(entry, width, height) {\n var elementWidth = Math.round(width / this.params.pixelRatio);\n var totalWidth = Math.round(this.width / this.params.pixelRatio); // update canvas dimensions\n\n entry.updateDimensions(elementWidth, totalWidth, width, height); // style element\n\n this.style(this.progressWave, {\n display: 'block'\n });\n }\n /**\n * Clear the whole multi-canvas\n */\n\n }, {\n key: \"clearWave\",\n value: function clearWave() {\n var _this3 = this;\n\n util.frame(function () {\n _this3.canvases.forEach(function (entry) {\n return entry.clearWave();\n });\n })();\n }\n /**\n * Draw a waveform with bars\n *\n * @param {number[]|Number.} peaks Can also be an array of arrays\n * for split channel rendering\n * @param {number} channelIndex The index of the current channel. Normally\n * should be 0. Must be an integer.\n * @param {number} start The x-offset of the beginning of the area that\n * should be rendered\n * @param {number} end The x-offset of the end of the area that should be\n * rendered\n * @returns {void}\n */\n\n }, {\n key: \"drawBars\",\n value: function drawBars(peaks, channelIndex, start, end) {\n var _this4 = this;\n\n return this.prepareDraw(peaks, channelIndex, start, end, function (_ref) {\n var absmax = _ref.absmax,\n hasMinVals = _ref.hasMinVals,\n height = _ref.height,\n offsetY = _ref.offsetY,\n halfH = _ref.halfH,\n peaks = _ref.peaks;\n\n // if drawBars was called within ws.empty we don't pass a start and\n // don't want anything to happen\n if (start === undefined) {\n return;\n } // Skip every other value if there are negatives.\n\n\n var peakIndexScale = hasMinVals ? 2 : 1;\n var length = peaks.length / peakIndexScale;\n var bar = _this4.params.barWidth * _this4.params.pixelRatio;\n var gap = _this4.params.barGap === null ? Math.max(_this4.params.pixelRatio, ~~(bar / 2)) : Math.max(_this4.params.pixelRatio, _this4.params.barGap * _this4.params.pixelRatio);\n var step = bar + gap;\n var scale = length / _this4.width;\n var first = start;\n var last = end;\n var i = first;\n\n for (i; i < last; i += step) {\n var peak = peaks[Math.floor(i * scale * peakIndexScale)] || 0;\n var h = Math.round(peak / absmax * halfH);\n /* in case of silences, allow the user to specify that we\n * always draw *something* (normally a 1px high bar) */\n\n if (h == 0 && _this4.params.barMinHeight) h = _this4.params.barMinHeight;\n\n _this4.fillRect(i + _this4.halfPixel, halfH - h + offsetY, bar + _this4.halfPixel, h * 2, _this4.barRadius);\n }\n });\n }\n /**\n * Draw a waveform\n *\n * @param {number[]|Number.} peaks Can also be an array of arrays\n * for split channel rendering\n * @param {number} channelIndex The index of the current channel. Normally\n * should be 0\n * @param {number?} start The x-offset of the beginning of the area that\n * should be rendered (If this isn't set only a flat line is rendered)\n * @param {number?} end The x-offset of the end of the area that should be\n * rendered\n * @returns {void}\n */\n\n }, {\n key: \"drawWave\",\n value: function drawWave(peaks, channelIndex, start, end) {\n var _this5 = this;\n\n return this.prepareDraw(peaks, channelIndex, start, end, function (_ref2) {\n var absmax = _ref2.absmax,\n hasMinVals = _ref2.hasMinVals,\n height = _ref2.height,\n offsetY = _ref2.offsetY,\n halfH = _ref2.halfH,\n peaks = _ref2.peaks;\n\n if (!hasMinVals) {\n var reflectedPeaks = [];\n var len = peaks.length;\n var i = 0;\n\n for (i; i < len; i++) {\n reflectedPeaks[2 * i] = peaks[i];\n reflectedPeaks[2 * i + 1] = -peaks[i];\n }\n\n peaks = reflectedPeaks;\n } // if drawWave was called within ws.empty we don't pass a start and\n // end and simply want a flat line\n\n\n if (start !== undefined) {\n _this5.drawLine(peaks, absmax, halfH, offsetY, start, end);\n } // always draw a median line\n\n\n _this5.fillRect(0, halfH + offsetY - _this5.halfPixel, _this5.width, _this5.halfPixel, _this5.barRadius);\n });\n }\n /**\n * Tell the canvas entries to render their portion of the waveform\n *\n * @private\n * @param {number[]} peaks Peaks data\n * @param {number} absmax Maximum peak value (absolute)\n * @param {number} halfH Half the height of the waveform\n * @param {number} offsetY Offset to the top\n * @param {number} start The x-offset of the beginning of the area that\n * should be rendered\n * @param {number} end The x-offset of the end of the area that\n * should be rendered\n */\n\n }, {\n key: \"drawLine\",\n value: function drawLine(peaks, absmax, halfH, offsetY, start, end) {\n var _this6 = this;\n\n this.canvases.forEach(function (entry) {\n _this6.setFillStyles(entry);\n\n entry.drawLines(peaks, absmax, halfH, offsetY, start, end);\n });\n }\n /**\n * Draw a rectangle on the multi-canvas\n *\n * @param {number} x X-position of the rectangle\n * @param {number} y Y-position of the rectangle\n * @param {number} width Width of the rectangle\n * @param {number} height Height of the rectangle\n * @param {number} radius Radius of the rectangle\n */\n\n }, {\n key: \"fillRect\",\n value: function fillRect(x, y, width, height, radius) {\n var startCanvas = Math.floor(x / this.maxCanvasWidth);\n var endCanvas = Math.min(Math.ceil((x + width) / this.maxCanvasWidth) + 1, this.canvases.length);\n var i = startCanvas;\n\n for (i; i < endCanvas; i++) {\n var entry = this.canvases[i];\n var leftOffset = i * this.maxCanvasWidth;\n var intersection = {\n x1: Math.max(x, i * this.maxCanvasWidth),\n y1: y,\n x2: Math.min(x + width, i * this.maxCanvasWidth + entry.wave.width),\n y2: y + height\n };\n\n if (intersection.x1 < intersection.x2) {\n this.setFillStyles(entry);\n entry.fillRects(intersection.x1 - leftOffset, intersection.y1, intersection.x2 - intersection.x1, intersection.y2 - intersection.y1, radius);\n }\n }\n }\n /**\n * Performs preparation tasks and calculations which are shared by `drawBars`\n * and `drawWave`\n *\n * @private\n * @param {number[]|Number.} peaks Can also be an array of arrays for\n * split channel rendering\n * @param {number} channelIndex The index of the current channel. Normally\n * should be 0\n * @param {number?} start The x-offset of the beginning of the area that\n * should be rendered. If this isn't set only a flat line is rendered\n * @param {number?} end The x-offset of the end of the area that should be\n * rendered\n * @param {function} fn The render function to call, e.g. `drawWave`\n * @returns {void}\n */\n\n }, {\n key: \"prepareDraw\",\n value: function prepareDraw(peaks, channelIndex, start, end, fn) {\n var _this7 = this;\n\n return util.frame(function () {\n // Split channels and call this function with the channelIndex set\n if (peaks[0] instanceof Array) {\n var channels = peaks;\n\n if (_this7.params.splitChannels) {\n _this7.setHeight(channels.length * _this7.params.height * _this7.params.pixelRatio);\n\n return channels.forEach(function (channelPeaks, i) {\n return _this7.prepareDraw(channelPeaks, i, start, end, fn);\n });\n }\n\n peaks = channels[0];\n } // calculate maximum modulation value, either from the barHeight\n // parameter or if normalize=true from the largest value in the peak\n // set\n\n\n var absmax = 1 / _this7.params.barHeight;\n\n if (_this7.params.normalize) {\n var max = util.max(peaks);\n var min = util.min(peaks);\n absmax = -min > max ? -min : max;\n } // Bar wave draws the bottom only as a reflection of the top,\n // so we don't need negative values\n\n\n var hasMinVals = [].some.call(peaks, function (val) {\n return val < 0;\n });\n var height = _this7.params.height * _this7.params.pixelRatio;\n var offsetY = height * channelIndex || 0;\n var halfH = height / 2;\n return fn({\n absmax: absmax,\n hasMinVals: hasMinVals,\n height: height,\n offsetY: offsetY,\n halfH: halfH,\n peaks: peaks\n });\n })();\n }\n /**\n * Set the fill styles for a certain entry (wave and progress)\n *\n * @private\n * @param {CanvasEntry} entry Target entry\n */\n\n }, {\n key: \"setFillStyles\",\n value: function setFillStyles(entry) {\n entry.setFillStyles(this.params.waveColor, this.params.progressColor);\n }\n /**\n * Return image data of the multi-canvas\n *\n * When using a `type` of `'blob'`, this will return a `Promise`.\n *\n * @param {string} format='image/png' An optional value of a format type.\n * @param {number} quality=0.92 An optional value between 0 and 1.\n * @param {string} type='dataURL' Either 'dataURL' or 'blob'.\n * @return {string|string[]|Promise} When using the default `'dataURL'`\n * `type` this returns a single data URL or an array of data URLs,\n * one for each canvas. When using the `'blob'` `type` this returns a\n * `Promise` that resolves with an array of `Blob` instances, one for each\n * canvas.\n */\n\n }, {\n key: \"getImage\",\n value: function getImage(format, quality, type) {\n if (type === 'blob') {\n return Promise.all(this.canvases.map(function (entry) {\n return entry.getImage(format, quality, type);\n }));\n } else if (type === 'dataURL') {\n var images = this.canvases.map(function (entry) {\n return entry.getImage(format, quality, type);\n });\n return images.length > 1 ? images : images[0];\n }\n }\n /**\n * Render the new progress\n *\n * @param {number} position X-offset of progress position in pixels\n */\n\n }, {\n key: \"updateProgress\",\n value: function updateProgress(position) {\n this.style(this.progressWave, {\n width: position + 'px'\n });\n }\n }]);\n\n return MultiCanvas;\n }(_drawer.default);\n\n exports.default = MultiCanvas;\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/mediaelement-webaudio.js\":\n /*!**************************************!*\\\n !*** ./src/mediaelement-webaudio.js ***!\n \\**************************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n var _mediaelement = _interopRequireDefault(__webpack_require__(/*! ./mediaelement */ \"./src/mediaelement.js\"));\n\n function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) { return call; } return _assertThisInitialized(self); }\n\n function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return self; }\n\n function _get(target, property, receiver) { if (typeof Reflect !== \"undefined\" && Reflect.get) { _get = Reflect.get; } else { _get = function _get(target, property, receiver) { var base = _superPropBase(target, property); if (!base) return; var desc = Object.getOwnPropertyDescriptor(base, property); if (desc.get) { return desc.get.call(receiver); } return desc.value; }; } return _get(target, property, receiver || target); }\n\n function _superPropBase(object, property) { while (!Object.prototype.hasOwnProperty.call(object, property)) { object = _getPrototypeOf(object); if (object === null) break; } return object; }\n\n function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }\n\n function _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function\"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }\n\n function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }\n\n /**\n * MediaElementWebAudio backend: allows to load audio as HTML5 audio tag and use it with WebAudio API.\n * Setting the MediaElementWebAudio backend, there is the possibility to load audio of big dimensions, using the WebAudio API features.\n * The audio to load is an HTML5 audio tag, so you have to use the same methods of MediaElement backend for loading and playback.\n * In this way, the audio resource is not loaded entirely from server, but in ranges, since you load an HTML5 audio tag.\n * In this way, filters and other functionalities can be performed like with WebAudio backend, but without decoding\n * internally audio data, that caused crashing of the browser. You have to give also peaks, so the audio data are not decoded.\n *\n * @since 3.2.0\n */\n var MediaElementWebAudio =\n /*#__PURE__*/\n function (_MediaElement) {\n _inherits(MediaElementWebAudio, _MediaElement);\n\n /**\n * Construct the backend\n *\n * @param {WavesurferParams} params Wavesurfer parameters\n */\n function MediaElementWebAudio(params) {\n var _this;\n\n _classCallCheck(this, MediaElementWebAudio);\n\n _this = _possibleConstructorReturn(this, _getPrototypeOf(MediaElementWebAudio).call(this, params));\n /** @private */\n\n _this.params = params;\n /** @private */\n\n _this.sourceMediaElement = null;\n return _this;\n }\n /**\n * Initialise the backend, called in `wavesurfer.createBackend()`\n */\n\n\n _createClass(MediaElementWebAudio, [{\n key: \"init\",\n value: function init() {\n this.setPlaybackRate(this.params.audioRate);\n this.createTimer();\n this.createVolumeNode();\n this.createScriptNode();\n this.createAnalyserNode();\n }\n /**\n * Private method called by both `load` (from url)\n * and `loadElt` (existing media element) methods.\n *\n * @param {HTMLMediaElement} media HTML5 Audio or Video element\n * @param {number[]|Number.} peaks Array of peak data\n * @private\n */\n\n }, {\n key: \"_load\",\n value: function _load(media, peaks) {\n _get(_getPrototypeOf(MediaElementWebAudio.prototype), \"_load\", this).call(this, media, peaks);\n\n this.createMediaElementSource(media);\n }\n /**\n * Create MediaElementSource node\n *\n * @since 3.2.0\n * @param {HTMLMediaElement} mediaElement HTML5 Audio to load\n */\n\n }, {\n key: \"createMediaElementSource\",\n value: function createMediaElementSource(mediaElement) {\n this.sourceMediaElement = this.ac.createMediaElementSource(mediaElement);\n this.sourceMediaElement.connect(this.analyser);\n }\n }]);\n\n return MediaElementWebAudio;\n }(_mediaelement.default);\n\n exports.default = MediaElementWebAudio;\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/mediaelement.js\":\n /*!*****************************!*\\\n !*** ./src/mediaelement.js ***!\n \\*****************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n var _webaudio = _interopRequireDefault(__webpack_require__(/*! ./webaudio */ \"./src/webaudio.js\"));\n\n var util = _interopRequireWildcard(__webpack_require__(/*! ./util */ \"./src/util/index.js\"));\n\n function _getRequireWildcardCache() { if (typeof WeakMap !== \"function\") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }\n\n function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== \"object\" && typeof obj !== \"function\") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }\n\n function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) { return call; } return _assertThisInitialized(self); }\n\n function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return self; }\n\n function _get(target, property, receiver) { if (typeof Reflect !== \"undefined\" && Reflect.get) { _get = Reflect.get; } else { _get = function _get(target, property, receiver) { var base = _superPropBase(target, property); if (!base) return; var desc = Object.getOwnPropertyDescriptor(base, property); if (desc.get) { return desc.get.call(receiver); } return desc.value; }; } return _get(target, property, receiver || target); }\n\n function _superPropBase(object, property) { while (!Object.prototype.hasOwnProperty.call(object, property)) { object = _getPrototypeOf(object); if (object === null) break; } return object; }\n\n function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }\n\n function _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function\"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }\n\n function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }\n\n /**\n * MediaElement backend\n */\n var MediaElement =\n /*#__PURE__*/\n function (_WebAudio) {\n _inherits(MediaElement, _WebAudio);\n\n /**\n * Construct the backend\n *\n * @param {WavesurferParams} params Wavesurfer parameters\n */\n function MediaElement(params) {\n var _this;\n\n _classCallCheck(this, MediaElement);\n\n _this = _possibleConstructorReturn(this, _getPrototypeOf(MediaElement).call(this, params));\n /** @private */\n\n _this.params = params;\n /**\n * Initially a dummy media element to catch errors. Once `_load` is\n * called, this will contain the actual `HTMLMediaElement`.\n * @private\n */\n\n _this.media = {\n currentTime: 0,\n duration: 0,\n paused: true,\n playbackRate: 1,\n play: function play() {},\n pause: function pause() {},\n volume: 0\n };\n /** @private */\n\n _this.mediaType = params.mediaType.toLowerCase();\n /** @private */\n\n _this.elementPosition = params.elementPosition;\n /** @private */\n\n _this.peaks = null;\n /** @private */\n\n _this.playbackRate = 1;\n /** @private */\n\n _this.volume = 1;\n /** @private */\n\n _this.isMuted = false;\n /** @private */\n\n _this.buffer = null;\n /** @private */\n\n _this.onPlayEnd = null;\n /** @private */\n\n _this.mediaListeners = {};\n return _this;\n }\n /**\n * Initialise the backend, called in `wavesurfer.createBackend()`\n */\n\n\n _createClass(MediaElement, [{\n key: \"init\",\n value: function init() {\n this.setPlaybackRate(this.params.audioRate);\n this.createTimer();\n }\n /**\n * Attach event listeners to media element.\n */\n\n }, {\n key: \"_setupMediaListeners\",\n value: function _setupMediaListeners() {\n var _this2 = this;\n\n this.mediaListeners.error = function () {\n _this2.fireEvent('error', 'Error loading media element');\n };\n\n this.mediaListeners.canplay = function () {\n _this2.fireEvent('canplay');\n };\n\n this.mediaListeners.ended = function () {\n _this2.fireEvent('finish');\n }; // listen to and relay play, pause and seeked events to enable\n // playback control from the external media element\n\n\n this.mediaListeners.play = function () {\n _this2.fireEvent('play');\n };\n\n this.mediaListeners.pause = function () {\n _this2.fireEvent('pause');\n };\n\n this.mediaListeners.seeked = function (event) {\n _this2.fireEvent('seek');\n };\n\n this.mediaListeners.volumechange = function (event) {\n _this2.isMuted = _this2.media.muted;\n\n if (_this2.isMuted) {\n _this2.volume = 0;\n } else {\n _this2.volume = _this2.media.volume;\n }\n\n _this2.fireEvent('volume');\n }; // reset event listeners\n\n\n Object.keys(this.mediaListeners).forEach(function (id) {\n _this2.media.removeEventListener(id, _this2.mediaListeners[id]);\n\n _this2.media.addEventListener(id, _this2.mediaListeners[id]);\n });\n }\n /**\n * Create a timer to provide a more precise `audioprocess` event.\n */\n\n }, {\n key: \"createTimer\",\n value: function createTimer() {\n var _this3 = this;\n\n var onAudioProcess = function onAudioProcess() {\n if (_this3.isPaused()) {\n return;\n }\n\n _this3.fireEvent('audioprocess', _this3.getCurrentTime()); // Call again in the next frame\n\n\n util.frame(onAudioProcess)();\n };\n\n this.on('play', onAudioProcess); // Update the progress one more time to prevent it from being stuck in\n // case of lower framerates\n\n this.on('pause', function () {\n _this3.fireEvent('audioprocess', _this3.getCurrentTime());\n });\n }\n /**\n * Create media element with url as its source,\n * and append to container element.\n *\n * @param {string} url Path to media file\n * @param {HTMLElement} container HTML element\n * @param {number[]|Number.} peaks Array of peak data\n * @param {string} preload HTML 5 preload attribute value\n * @throws Will throw an error if the `url` argument is not a valid media\n * element.\n */\n\n }, {\n key: \"load\",\n value: function load(url, container, peaks, preload) {\n var media = document.createElement(this.mediaType);\n media.controls = this.params.mediaControls;\n media.autoplay = this.params.autoplay || false;\n media.preload = preload == null ? 'auto' : preload;\n media.src = url;\n media.style.width = '100%';\n var prevMedia = container.querySelector(this.mediaType);\n\n if (prevMedia) {\n container.removeChild(prevMedia);\n }\n\n container.appendChild(media);\n\n this._load(media, peaks);\n }\n /**\n * Load existing media element.\n *\n * @param {HTMLMediaElement} elt HTML5 Audio or Video element\n * @param {number[]|Number.} peaks Array of peak data\n */\n\n }, {\n key: \"loadElt\",\n value: function loadElt(elt, peaks) {\n elt.controls = this.params.mediaControls;\n elt.autoplay = this.params.autoplay || false;\n\n this._load(elt, peaks);\n }\n /**\n * Method called by both `load` (from url)\n * and `loadElt` (existing media element) methods.\n *\n * @param {HTMLMediaElement} media HTML5 Audio or Video element\n * @param {number[]|Number.} peaks Array of peak data\n * @throws Will throw an error if the `media` argument is not a valid media\n * element.\n * @private\n */\n\n }, {\n key: \"_load\",\n value: function _load(media, peaks) {\n // verify media element is valid\n if (!(media instanceof HTMLMediaElement) || typeof media.addEventListener === 'undefined') {\n throw new Error('media parameter is not a valid media element');\n } // load must be called manually on iOS, otherwise peaks won't draw\n // until a user interaction triggers load --> 'ready' event\n\n\n if (typeof media.load == 'function') {\n // Resets the media element and restarts the media resource. Any\n // pending events are discarded. How much media data is fetched is\n // still affected by the preload attribute.\n media.load();\n }\n\n this.media = media;\n\n this._setupMediaListeners();\n\n this.peaks = peaks;\n this.onPlayEnd = null;\n this.buffer = null;\n this.isMuted = media.muted;\n this.setPlaybackRate(this.playbackRate);\n this.setVolume(this.volume);\n }\n /**\n * Used by `wavesurfer.isPlaying()` and `wavesurfer.playPause()`\n *\n * @return {boolean} Media paused or not\n */\n\n }, {\n key: \"isPaused\",\n value: function isPaused() {\n return !this.media || this.media.paused;\n }\n /**\n * Used by `wavesurfer.getDuration()`\n *\n * @return {number} Duration\n */\n\n }, {\n key: \"getDuration\",\n value: function getDuration() {\n if (this.explicitDuration) {\n return this.explicitDuration;\n }\n\n var duration = (this.buffer || this.media).duration;\n\n if (duration >= Infinity) {\n // streaming audio\n duration = this.media.seekable.end(0);\n }\n\n return duration;\n }\n /**\n * Returns the current time in seconds relative to the audio-clip's\n * duration.\n *\n * @return {number} Current time\n */\n\n }, {\n key: \"getCurrentTime\",\n value: function getCurrentTime() {\n return this.media && this.media.currentTime;\n }\n /**\n * Get the position from 0 to 1\n *\n * @return {number} Current position\n */\n\n }, {\n key: \"getPlayedPercents\",\n value: function getPlayedPercents() {\n return this.getCurrentTime() / this.getDuration() || 0;\n }\n /**\n * Get the audio source playback rate.\n *\n * @return {number} Playback rate\n */\n\n }, {\n key: \"getPlaybackRate\",\n value: function getPlaybackRate() {\n return this.playbackRate || this.media.playbackRate;\n }\n /**\n * Set the audio source playback rate.\n *\n * @param {number} value Playback rate\n */\n\n }, {\n key: \"setPlaybackRate\",\n value: function setPlaybackRate(value) {\n this.playbackRate = value || 1;\n this.media.playbackRate = this.playbackRate;\n }\n /**\n * Used by `wavesurfer.seekTo()`\n *\n * @param {number} start Position to start at in seconds\n */\n\n }, {\n key: \"seekTo\",\n value: function seekTo(start) {\n if (start != null) {\n this.media.currentTime = start;\n }\n\n this.clearPlayEnd();\n }\n /**\n * Plays the loaded audio region.\n *\n * @param {number} start Start offset in seconds, relative to the beginning\n * of a clip.\n * @param {number} end When to stop, relative to the beginning of a clip.\n * @emits MediaElement#play\n * @return {Promise} Result\n */\n\n }, {\n key: \"play\",\n value: function play(start, end) {\n this.seekTo(start);\n var promise = this.media.play();\n end && this.setPlayEnd(end);\n return promise;\n }\n /**\n * Pauses the loaded audio.\n *\n * @emits MediaElement#pause\n * @return {Promise} Result\n */\n\n }, {\n key: \"pause\",\n value: function pause() {\n var promise;\n\n if (this.media) {\n promise = this.media.pause();\n }\n\n this.clearPlayEnd();\n return promise;\n }\n /**\n * Set the play end\n *\n * @param {number} end Where to end\n */\n\n }, {\n key: \"setPlayEnd\",\n value: function setPlayEnd(end) {\n var _this4 = this;\n\n this.clearPlayEnd();\n\n this._onPlayEnd = function (time) {\n if (time >= end) {\n _this4.pause();\n\n _this4.seekTo(end);\n }\n };\n\n this.on('audioprocess', this._onPlayEnd);\n }\n /** @private */\n\n }, {\n key: \"clearPlayEnd\",\n value: function clearPlayEnd() {\n if (this._onPlayEnd) {\n this.un('audioprocess', this._onPlayEnd);\n this._onPlayEnd = null;\n }\n }\n /**\n * Compute the max and min value of the waveform when broken into\n * subranges.\n *\n * @param {number} length How many subranges to break the waveform into.\n * @param {number} first First sample in the required range.\n * @param {number} last Last sample in the required range.\n * @return {number[]|Number.} Array of 2* peaks or array of\n * arrays of peaks consisting of (max, min) values for each subrange.\n */\n\n }, {\n key: \"getPeaks\",\n value: function getPeaks(length, first, last) {\n if (this.buffer) {\n return _get(_getPrototypeOf(MediaElement.prototype), \"getPeaks\", this).call(this, length, first, last);\n }\n\n return this.peaks || [];\n }\n /**\n * Set the sink id for the media player\n *\n * @param {string} deviceId String value representing audio device id.\n * @returns {Promise} A Promise that resolves to `undefined` when there\n * are no errors.\n */\n\n }, {\n key: \"setSinkId\",\n value: function setSinkId(deviceId) {\n if (deviceId) {\n if (!this.media.setSinkId) {\n return Promise.reject(new Error('setSinkId is not supported in your browser'));\n }\n\n return this.media.setSinkId(deviceId);\n }\n\n return Promise.reject(new Error('Invalid deviceId: ' + deviceId));\n }\n /**\n * Get the current volume\n *\n * @return {number} value A floating point value between 0 and 1.\n */\n\n }, {\n key: \"getVolume\",\n value: function getVolume() {\n return this.volume;\n }\n /**\n * Set the audio volume\n *\n * @param {number} value A floating point value between 0 and 1.\n */\n\n }, {\n key: \"setVolume\",\n value: function setVolume(value) {\n this.volume = value; // no need to change when it's already at that volume\n\n if (this.media.volume !== this.volume) {\n this.media.volume = this.volume;\n }\n }\n /**\n * This is called when wavesurfer is destroyed\n *\n */\n\n }, {\n key: \"destroy\",\n value: function destroy() {\n var _this5 = this;\n\n this.pause();\n this.unAll();\n this.destroyed = true; // cleanup media event listeners\n\n Object.keys(this.mediaListeners).forEach(function (id) {\n if (_this5.media) {\n _this5.media.removeEventListener(id, _this5.mediaListeners[id]);\n }\n });\n\n if (this.params.removeMediaElementOnDestroy && this.media && this.media.parentNode) {\n this.media.parentNode.removeChild(this.media);\n }\n\n this.media = null;\n }\n }]);\n\n return MediaElement;\n }(_webaudio.default);\n\n exports.default = MediaElement;\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/peakcache.js\":\n /*!**************************!*\\\n !*** ./src/peakcache.js ***!\n \\**************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n /**\n * Caches the decoded peaks data to improve rendering speed for large audio\n *\n * Is used if the option parameter `partialRender` is set to `true`\n */\n var PeakCache =\n /*#__PURE__*/\n function () {\n /**\n * Instantiate cache\n */\n function PeakCache() {\n _classCallCheck(this, PeakCache);\n\n this.clearPeakCache();\n }\n /**\n * Empty the cache\n */\n\n\n _createClass(PeakCache, [{\n key: \"clearPeakCache\",\n value: function clearPeakCache() {\n /**\n * Flat array with entries that are always in pairs to mark the\n * beginning and end of each subrange. This is a convenience so we can\n * iterate over the pairs for easy set difference operations.\n * @private\n */\n this.peakCacheRanges = [];\n /**\n * Length of the entire cachable region, used for resetting the cache\n * when this changes (zoom events, for instance).\n * @private\n */\n\n this.peakCacheLength = -1;\n }\n /**\n * Add a range of peaks to the cache\n *\n * @param {number} length The length of the range\n * @param {number} start The x offset of the start of the range\n * @param {number} end The x offset of the end of the range\n * @return {Number.} Array with arrays of numbers\n */\n\n }, {\n key: \"addRangeToPeakCache\",\n value: function addRangeToPeakCache(length, start, end) {\n if (length != this.peakCacheLength) {\n this.clearPeakCache();\n this.peakCacheLength = length;\n } // Return ranges that weren't in the cache before the call.\n\n\n var uncachedRanges = [];\n var i = 0; // Skip ranges before the current start.\n\n while (i < this.peakCacheRanges.length && this.peakCacheRanges[i] < start) {\n i++;\n } // If |i| is even, |start| falls after an existing range. Otherwise,\n // |start| falls between an existing range, and the uncached region\n // starts when we encounter the next node in |peakCacheRanges| or\n // |end|, whichever comes first.\n\n\n if (i % 2 == 0) {\n uncachedRanges.push(start);\n }\n\n while (i < this.peakCacheRanges.length && this.peakCacheRanges[i] <= end) {\n uncachedRanges.push(this.peakCacheRanges[i]);\n i++;\n } // If |i| is even, |end| is after all existing ranges.\n\n\n if (i % 2 == 0) {\n uncachedRanges.push(end);\n } // Filter out the 0-length ranges.\n\n\n uncachedRanges = uncachedRanges.filter(function (item, pos, arr) {\n if (pos == 0) {\n return item != arr[pos + 1];\n } else if (pos == arr.length - 1) {\n return item != arr[pos - 1];\n }\n\n return item != arr[pos - 1] && item != arr[pos + 1];\n }); // Merge the two ranges together, uncachedRanges will either contain\n // wholly new points, or duplicates of points in peakCacheRanges. If\n // duplicates are detected, remove both and extend the range.\n\n this.peakCacheRanges = this.peakCacheRanges.concat(uncachedRanges);\n this.peakCacheRanges = this.peakCacheRanges.sort(function (a, b) {\n return a - b;\n }).filter(function (item, pos, arr) {\n if (pos == 0) {\n return item != arr[pos + 1];\n } else if (pos == arr.length - 1) {\n return item != arr[pos - 1];\n }\n\n return item != arr[pos - 1] && item != arr[pos + 1];\n }); // Push the uncached ranges into an array of arrays for ease of\n // iteration in the functions that call this.\n\n var uncachedRangePairs = [];\n\n for (i = 0; i < uncachedRanges.length; i += 2) {\n uncachedRangePairs.push([uncachedRanges[i], uncachedRanges[i + 1]]);\n }\n\n return uncachedRangePairs;\n }\n /**\n * For testing\n *\n * @return {Number.} Array with arrays of numbers\n */\n\n }, {\n key: \"getCacheRanges\",\n value: function getCacheRanges() {\n var peakCacheRangePairs = [];\n var i;\n\n for (i = 0; i < this.peakCacheRanges.length; i += 2) {\n peakCacheRangePairs.push([this.peakCacheRanges[i], this.peakCacheRanges[i + 1]]);\n }\n\n return peakCacheRangePairs;\n }\n }]);\n\n return PeakCache;\n }();\n\n exports.default = PeakCache;\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/ajax.js\":\n /*!**************************!*\\\n !*** ./src/util/ajax.js ***!\n \\**************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = ajax;\n\n var _observer = _interopRequireDefault(__webpack_require__(/*! ./observer */ \"./src/util/observer.js\"));\n\n function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n /**\n * Perform an ajax request using `XMLHttpRequest`.\n *\n * @deprecated Use `util.fetchFile` instead.\n *\n * @param {Object} options AJAX options to use. See example below for options.\n * @returns {Observer} Observer instance\n * @example\n * // default options\n * let options = {\n * method: 'GET',\n * url: undefined,\n * responseType: 'json',\n * xhr: {}\n * };\n *\n * // override default options\n * options.url = '../media/demo.wav';\n * options.responseType = 'arraybuffer';\n * options.xhr = {\n * requestHeaders: [\n * {\n * key: 'Authorization',\n * value: 'my-token'\n * }\n * ],\n * withCredentials: true\n * };\n *\n * // make ajax call\n * let ajaxCall = util.ajax(options);\n * ajaxCall.on('progress', e => {\n * console.log('progress', e);\n * });\n * ajaxCall.on('success', (data, e) => {\n * console.log('success!', data);\n * });\n * ajaxCall.on('error', e => {\n * console.warn('ajax error: ' + e.target.statusText);\n * });\n */\n function ajax(options) {\n var instance = new _observer.default();\n var xhr = new XMLHttpRequest();\n var fired100 = false;\n xhr.open(options.method || 'GET', options.url, true);\n xhr.responseType = options.responseType || 'json';\n\n if (options.xhr) {\n if (options.xhr.requestHeaders) {\n // add custom request headers\n options.xhr.requestHeaders.forEach(function (header) {\n xhr.setRequestHeader(header.key, header.value);\n });\n }\n\n if (options.xhr.withCredentials) {\n // use credentials\n xhr.withCredentials = true;\n }\n }\n\n xhr.addEventListener('progress', function (e) {\n instance.fireEvent('progress', e);\n\n if (e.lengthComputable && e.loaded == e.total) {\n fired100 = true;\n }\n });\n xhr.addEventListener('load', function (e) {\n if (!fired100) {\n instance.fireEvent('progress', e);\n }\n\n instance.fireEvent('load', e);\n\n if (200 == xhr.status || 206 == xhr.status) {\n instance.fireEvent('success', xhr.response, e);\n } else {\n instance.fireEvent('error', e);\n }\n });\n xhr.addEventListener('error', function (e) {\n return instance.fireEvent('error', e);\n });\n xhr.send();\n instance.xhr = xhr;\n return instance;\n }\n\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/extend.js\":\n /*!****************************!*\\\n !*** ./src/util/extend.js ***!\n \\****************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = extend;\n\n /* eslint no-console: [\"error\", { allow: [\"warn\"] }] */\n\n /**\n * Extend an object shallowly with others\n *\n * @param {Object} dest The target object\n * @param {Object[]} sources The objects to use for extending\n *\n * @return {Object} Merged object\n * @deprecated since version 3.3.0\n */\n function extend(dest) {\n console.warn('util.extend is deprecated; use Object.assign instead');\n\n for (var _len = arguments.length, sources = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n sources[_key - 1] = arguments[_key];\n }\n\n sources.forEach(function (source) {\n Object.keys(source).forEach(function (key) {\n dest[key] = source[key];\n });\n });\n return dest;\n }\n\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/fetch.js\":\n /*!***************************!*\\\n !*** ./src/util/fetch.js ***!\n \\***************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = fetchFile;\n\n var _observer = _interopRequireDefault(__webpack_require__(/*! ./observer */ \"./src/util/observer.js\"));\n\n function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n var ProgressHandler =\n /*#__PURE__*/\n function () {\n /**\n * Instantiate ProgressHandler\n *\n * @param {Observer} instance The `fetchFile` observer instance.\n * @param {Number} contentLength Content length.\n * @param {Response} response Response object.\n */\n function ProgressHandler(instance, contentLength, response) {\n _classCallCheck(this, ProgressHandler);\n\n this.instance = instance;\n this.instance._reader = response.body.getReader();\n this.total = parseInt(contentLength, 10);\n this.loaded = 0;\n }\n /**\n * A method that is called once, immediately after the `ReadableStream``\n * is constructed.\n *\n * @param {ReadableStreamDefaultController} controller Controller instance\n * used to control the stream.\n */\n\n\n _createClass(ProgressHandler, [{\n key: \"start\",\n value: function start(controller) {\n var _this = this;\n\n var read = function read() {\n // instance._reader.read() returns a promise that resolves\n // when a value has been received\n _this.instance._reader.read().then(function (_ref) {\n var done = _ref.done,\n value = _ref.value;\n\n // result objects contain two properties:\n // done - true if the stream has already given you all its data.\n // value - some data. Always undefined when done is true.\n if (done) {\n // ensure onProgress called when content-length=0\n if (_this.total === 0) {\n _this.instance.onProgress.call(_this.instance, {\n loaded: _this.loaded,\n total: _this.total,\n lengthComputable: false\n });\n } // no more data needs to be consumed, close the stream\n\n\n controller.close();\n return;\n }\n\n _this.loaded += value.byteLength;\n\n _this.instance.onProgress.call(_this.instance, {\n loaded: _this.loaded,\n total: _this.total,\n lengthComputable: !(_this.total === 0)\n }); // enqueue the next data chunk into our target stream\n\n\n controller.enqueue(value);\n read();\n }).catch(function (error) {\n controller.error(error);\n });\n };\n\n read();\n }\n }]);\n\n return ProgressHandler;\n }();\n /**\n * Load a file using `fetch`.\n *\n * @param {object} options Request options to use. See example below.\n * @returns {Observer} Observer instance\n * @example\n * // default options\n * let options = {\n * url: undefined,\n * method: 'GET',\n * mode: 'cors',\n * credentials: 'same-origin',\n * cache: 'default',\n * responseType: 'json',\n * requestHeaders: [],\n * redirect: 'follow',\n * referrer: 'client'\n * };\n *\n * // override some options\n * options.url = '../media/demo.wav';\n\n * // available types: 'arraybuffer', 'blob', 'json' or 'text'\n * options.responseType = 'arraybuffer';\n *\n * // make fetch call\n * let request = util.fetchFile(options);\n *\n * // listen for events\n * request.on('progress', e => {\n * console.log('progress', e);\n * });\n *\n * request.on('success', data => {\n * console.log('success!', data);\n * });\n *\n * request.on('error', e => {\n * console.warn('fetchFile error: ', e);\n * });\n */\n\n\n function fetchFile(options) {\n if (!options) {\n throw new Error('fetch options missing');\n } else if (!options.url) {\n throw new Error('fetch url missing');\n }\n\n var instance = new _observer.default();\n var fetchHeaders = new Headers();\n var fetchRequest = new Request(options.url); // add ability to abort\n\n instance.controller = new AbortController(); // check if headers have to be added\n\n if (options && options.requestHeaders) {\n // add custom request headers\n options.requestHeaders.forEach(function (header) {\n fetchHeaders.append(header.key, header.value);\n });\n } // parse fetch options\n\n\n var responseType = options.responseType || 'json';\n var fetchOptions = {\n method: options.method || 'GET',\n headers: fetchHeaders,\n mode: options.mode || 'cors',\n credentials: options.credentials || 'same-origin',\n cache: options.cache || 'default',\n redirect: options.redirect || 'follow',\n referrer: options.referrer || 'client',\n signal: instance.controller.signal\n };\n fetch(fetchRequest, fetchOptions).then(function (response) {\n // store response reference\n instance.response = response;\n var progressAvailable = true;\n\n if (!response.body) {\n // ReadableStream is not yet supported in this browser\n // see https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream\n progressAvailable = false;\n } // Server must send CORS header \"Access-Control-Expose-Headers: content-length\"\n\n\n var contentLength = response.headers.get('content-length');\n\n if (contentLength === null) {\n // Content-Length server response header missing.\n // Don't evaluate download progress if we can't compare against a total size\n // see https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Access-Control-Expose-Headers\n progressAvailable = false;\n }\n\n if (!progressAvailable) {\n // not able to check download progress so skip it\n return response;\n } // fire progress event when during load\n\n\n instance.onProgress = function (e) {\n instance.fireEvent('progress', e);\n };\n\n return new Response(new ReadableStream(new ProgressHandler(instance, contentLength, response)), fetchOptions);\n }).then(function (response) {\n var errMsg;\n\n if (response.ok) {\n switch (responseType) {\n case 'arraybuffer':\n return response.arrayBuffer();\n\n case 'json':\n return response.json();\n\n case 'blob':\n return response.blob();\n\n case 'text':\n return response.text();\n\n default:\n errMsg = 'Unknown responseType: ' + responseType;\n break;\n }\n }\n\n if (!errMsg) {\n errMsg = 'HTTP error status: ' + response.status;\n }\n\n throw new Error(errMsg);\n }).then(function (response) {\n instance.fireEvent('success', response);\n }).catch(function (error) {\n instance.fireEvent('error', error);\n }); // return the fetch request\n\n instance.fetchRequest = fetchRequest;\n return instance;\n }\n\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/frame.js\":\n /*!***************************!*\\\n !*** ./src/util/frame.js ***!\n \\***************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = frame;\n\n var _requestAnimationFrame = _interopRequireDefault(__webpack_require__(/*! ./request-animation-frame */ \"./src/util/request-animation-frame.js\"));\n\n function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n /**\n * Create a function which will be called at the next requestAnimationFrame\n * cycle\n *\n * @param {function} func The function to call\n *\n * @return {func} The function wrapped within a requestAnimationFrame\n */\n function frame(func) {\n return function () {\n for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n args[_key] = arguments[_key];\n }\n\n return (0, _requestAnimationFrame.default)(function () {\n return func.apply(void 0, args);\n });\n };\n }\n\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/get-id.js\":\n /*!****************************!*\\\n !*** ./src/util/get-id.js ***!\n \\****************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = getId;\n\n /**\n * Get a random prefixed ID\n *\n * @param {String} prefix Prefix to use. Default is `'wavesurfer_'`.\n * @returns {String} Random prefixed ID\n * @example\n * console.log(getId()); // logs 'wavesurfer_b5pors4ru6g'\n *\n * let prefix = 'foo-';\n * console.log(getId(prefix)); // logs 'foo-b5pors4ru6g'\n */\n function getId(prefix) {\n if (prefix === undefined) {\n prefix = 'wavesurfer_';\n }\n\n return prefix + Math.random().toString(32).substring(2);\n }\n\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/index.js\":\n /*!***************************!*\\\n !*** ./src/util/index.js ***!\n \\***************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n Object.defineProperty(exports, \"ajax\", {\n enumerable: true,\n get: function get() {\n return _ajax.default;\n }\n });\n Object.defineProperty(exports, \"getId\", {\n enumerable: true,\n get: function get() {\n return _getId.default;\n }\n });\n Object.defineProperty(exports, \"max\", {\n enumerable: true,\n get: function get() {\n return _max.default;\n }\n });\n Object.defineProperty(exports, \"min\", {\n enumerable: true,\n get: function get() {\n return _min.default;\n }\n });\n Object.defineProperty(exports, \"Observer\", {\n enumerable: true,\n get: function get() {\n return _observer.default;\n }\n });\n Object.defineProperty(exports, \"extend\", {\n enumerable: true,\n get: function get() {\n return _extend.default;\n }\n });\n Object.defineProperty(exports, \"style\", {\n enumerable: true,\n get: function get() {\n return _style.default;\n }\n });\n Object.defineProperty(exports, \"requestAnimationFrame\", {\n enumerable: true,\n get: function get() {\n return _requestAnimationFrame.default;\n }\n });\n Object.defineProperty(exports, \"frame\", {\n enumerable: true,\n get: function get() {\n return _frame.default;\n }\n });\n Object.defineProperty(exports, \"debounce\", {\n enumerable: true,\n get: function get() {\n return _debounce.default;\n }\n });\n Object.defineProperty(exports, \"preventClick\", {\n enumerable: true,\n get: function get() {\n return _preventClick.default;\n }\n });\n Object.defineProperty(exports, \"fetchFile\", {\n enumerable: true,\n get: function get() {\n return _fetch.default;\n }\n });\n\n var _ajax = _interopRequireDefault(__webpack_require__(/*! ./ajax */ \"./src/util/ajax.js\"));\n\n var _getId = _interopRequireDefault(__webpack_require__(/*! ./get-id */ \"./src/util/get-id.js\"));\n\n var _max = _interopRequireDefault(__webpack_require__(/*! ./max */ \"./src/util/max.js\"));\n\n var _min = _interopRequireDefault(__webpack_require__(/*! ./min */ \"./src/util/min.js\"));\n\n var _observer = _interopRequireDefault(__webpack_require__(/*! ./observer */ \"./src/util/observer.js\"));\n\n var _extend = _interopRequireDefault(__webpack_require__(/*! ./extend */ \"./src/util/extend.js\"));\n\n var _style = _interopRequireDefault(__webpack_require__(/*! ./style */ \"./src/util/style.js\"));\n\n var _requestAnimationFrame = _interopRequireDefault(__webpack_require__(/*! ./request-animation-frame */ \"./src/util/request-animation-frame.js\"));\n\n var _frame = _interopRequireDefault(__webpack_require__(/*! ./frame */ \"./src/util/frame.js\"));\n\n var _debounce = _interopRequireDefault(__webpack_require__(/*! debounce */ \"./node_modules/debounce/index.js\"));\n\n var _preventClick = _interopRequireDefault(__webpack_require__(/*! ./prevent-click */ \"./src/util/prevent-click.js\"));\n\n var _fetch = _interopRequireDefault(__webpack_require__(/*! ./fetch */ \"./src/util/fetch.js\"));\n\n function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n /***/ }),\n\n /***/ \"./src/util/max.js\":\n /*!*************************!*\\\n !*** ./src/util/max.js ***!\n \\*************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = max;\n\n /**\n * Get the largest value\n *\n * @param {Array} values Array of numbers\n * @returns {Number} Largest number found\n * @example console.log(max([1, 2, 3])); // logs 3\n */\n function max(values) {\n var largest = -Infinity;\n Object.keys(values).forEach(function (i) {\n if (values[i] > largest) {\n largest = values[i];\n }\n });\n return largest;\n }\n\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/min.js\":\n /*!*************************!*\\\n !*** ./src/util/min.js ***!\n \\*************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = min;\n\n /**\n * Get the smallest value\n *\n * @param {Array} values Array of numbers\n * @returns {Number} Smallest number found\n * @example console.log(min([1, 2, 3])); // logs 1\n */\n function min(values) {\n var smallest = Number(Infinity);\n Object.keys(values).forEach(function (i) {\n if (values[i] < smallest) {\n smallest = values[i];\n }\n });\n return smallest;\n }\n\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/observer.js\":\n /*!******************************!*\\\n !*** ./src/util/observer.js ***!\n \\******************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n /**\n * @typedef {Object} ListenerDescriptor\n * @property {string} name The name of the event\n * @property {function} callback The callback\n * @property {function} un The function to call to remove the listener\n */\n\n /**\n * Observer class\n */\n var Observer =\n /*#__PURE__*/\n function () {\n /**\n * Instantiate Observer\n */\n function Observer() {\n _classCallCheck(this, Observer);\n\n /**\n * @private\n * @todo Initialise the handlers here already and remove the conditional\n * assignment in `on()`\n */\n this.handlers = null;\n }\n /**\n * Attach a handler function for an event.\n *\n * @param {string} event Name of the event to listen to\n * @param {function} fn The callback to trigger when the event is fired\n * @return {ListenerDescriptor} The event descriptor\n */\n\n\n _createClass(Observer, [{\n key: \"on\",\n value: function on(event, fn) {\n var _this = this;\n\n if (!this.handlers) {\n this.handlers = {};\n }\n\n var handlers = this.handlers[event];\n\n if (!handlers) {\n handlers = this.handlers[event] = [];\n }\n\n handlers.push(fn); // Return an event descriptor\n\n return {\n name: event,\n callback: fn,\n un: function un(e, fn) {\n return _this.un(e, fn);\n }\n };\n }\n /**\n * Remove an event handler.\n *\n * @param {string} event Name of the event the listener that should be\n * removed listens to\n * @param {function} fn The callback that should be removed\n */\n\n }, {\n key: \"un\",\n value: function un(event, fn) {\n if (!this.handlers) {\n return;\n }\n\n var handlers = this.handlers[event];\n var i;\n\n if (handlers) {\n if (fn) {\n for (i = handlers.length - 1; i >= 0; i--) {\n if (handlers[i] == fn) {\n handlers.splice(i, 1);\n }\n }\n } else {\n handlers.length = 0;\n }\n }\n }\n /**\n * Remove all event handlers.\n */\n\n }, {\n key: \"unAll\",\n value: function unAll() {\n this.handlers = null;\n }\n /**\n * Attach a handler to an event. The handler is executed at most once per\n * event type.\n *\n * @param {string} event The event to listen to\n * @param {function} handler The callback that is only to be called once\n * @return {ListenerDescriptor} The event descriptor\n */\n\n }, {\n key: \"once\",\n value: function once(event, handler) {\n var _this2 = this;\n\n var fn = function fn() {\n for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n args[_key] = arguments[_key];\n }\n\n /* eslint-disable no-invalid-this */\n handler.apply(_this2, args);\n /* eslint-enable no-invalid-this */\n\n setTimeout(function () {\n _this2.un(event, fn);\n }, 0);\n };\n\n return this.on(event, fn);\n }\n /**\n * Manually fire an event\n *\n * @param {string} event The event to fire manually\n * @param {...any} args The arguments with which to call the listeners\n */\n\n }, {\n key: \"fireEvent\",\n value: function fireEvent(event) {\n for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {\n args[_key2 - 1] = arguments[_key2];\n }\n\n if (!this.handlers) {\n return;\n }\n\n var handlers = this.handlers[event];\n handlers && handlers.forEach(function (fn) {\n fn.apply(void 0, args);\n });\n }\n }]);\n\n return Observer;\n }();\n\n exports.default = Observer;\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/prevent-click.js\":\n /*!***********************************!*\\\n !*** ./src/util/prevent-click.js ***!\n \\***********************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = preventClick;\n\n /**\n * Stops propagation of click event and removes event listener\n *\n * @private\n * @param {object} event The click event\n */\n function preventClickHandler(event) {\n event.stopPropagation();\n document.body.removeEventListener('click', preventClickHandler, true);\n }\n /**\n * Starts listening for click event and prevent propagation\n *\n * @param {object} values Values\n */\n\n\n function preventClick(values) {\n document.body.addEventListener('click', preventClickHandler, true);\n }\n\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/request-animation-frame.js\":\n /*!*********************************************!*\\\n !*** ./src/util/request-animation-frame.js ***!\n \\*********************************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n /* eslint-disable valid-jsdoc */\n\n /**\n * Returns the `requestAnimationFrame` function for the browser, or a shim with\n * `setTimeout` if the function is not found\n *\n * @return {function} Available `requestAnimationFrame` function for the browser\n */\n var _default = (window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback, element) {\n return setTimeout(callback, 1000 / 60);\n }).bind(window);\n\n exports.default = _default;\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/util/style.js\":\n /*!***************************!*\\\n !*** ./src/util/style.js ***!\n \\***************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = style;\n\n /**\n * Apply a map of styles to an element\n *\n * @param {HTMLElement} el The element that the styles will be applied to\n * @param {Object} styles The map of propName: attribute, both are used as-is\n *\n * @return {HTMLElement} el\n */\n function style(el, styles) {\n Object.keys(styles).forEach(function (prop) {\n if (el.style[prop] !== styles[prop]) {\n el.style[prop] = styles[prop];\n }\n });\n return el;\n }\n\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/wavesurfer.js\":\n /*!***************************!*\\\n !*** ./src/wavesurfer.js ***!\n \\***************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n var util = _interopRequireWildcard(__webpack_require__(/*! ./util */ \"./src/util/index.js\"));\n\n var _drawer = _interopRequireDefault(__webpack_require__(/*! ./drawer.multicanvas */ \"./src/drawer.multicanvas.js\"));\n\n var _webaudio = _interopRequireDefault(__webpack_require__(/*! ./webaudio */ \"./src/webaudio.js\"));\n\n var _mediaelement = _interopRequireDefault(__webpack_require__(/*! ./mediaelement */ \"./src/mediaelement.js\"));\n\n var _peakcache = _interopRequireDefault(__webpack_require__(/*! ./peakcache */ \"./src/peakcache.js\"));\n\n var _mediaelementWebaudio = _interopRequireDefault(__webpack_require__(/*! ./mediaelement-webaudio */ \"./src/mediaelement-webaudio.js\"));\n\n function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n function _getRequireWildcardCache() { if (typeof WeakMap !== \"function\") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }\n\n function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== \"object\" && typeof obj !== \"function\") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }\n\n function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\n function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) { return call; } return _assertThisInitialized(self); }\n\n function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }\n\n function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return self; }\n\n function _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function\"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }\n\n function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n /*\n * This work is licensed under a BSD-3-Clause License.\n */\n\n /** @external {HTMLElement} https://developer.mozilla.org/en/docs/Web/API/HTMLElement */\n\n /** @external {OfflineAudioContext} https://developer.mozilla.org/en-US/docs/Web/API/OfflineAudioContext */\n\n /** @external {File} https://developer.mozilla.org/en-US/docs/Web/API/File */\n\n /** @external {Blob} https://developer.mozilla.org/en-US/docs/Web/API/Blob */\n\n /** @external {CanvasRenderingContext2D} https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D */\n\n /** @external {MediaStreamConstraints} https://developer.mozilla.org/en-US/docs/Web/API/MediaStreamConstraints */\n\n /** @external {AudioNode} https://developer.mozilla.org/de/docs/Web/API/AudioNode */\n\n /**\n * @typedef {Object} WavesurferParams\n * @property {AudioContext} audioContext=null Use your own previously\n * initialized AudioContext or leave blank.\n * @property {number} audioRate=1 Speed at which to play audio. Lower number is\n * slower.\n * @property {ScriptProcessorNode} audioScriptProcessor=null Use your own previously\n * initialized ScriptProcessorNode or leave blank.\n * @property {boolean} autoCenter=true If a scrollbar is present, center the\n * waveform on current progress\n * @property {number} autoCenterRate=5 If autoCenter is active, rate at which the\n * waveform is centered\n * @property {boolean} autoCenterImmediately=false If autoCenter is active, immediately\n * center waveform on current progress\n * @property {string} backend='WebAudio' `'WebAudio'|'MediaElement'|'MediaElementWebAudio'` In most cases\n * you don't have to set this manually. MediaElement is a fallback for unsupported browsers.\n * MediaElementWebAudio allows to use WebAudio API also with big audio files, loading audio like with\n * MediaElement backend (HTML5 audio tag). You have to use the same methods of MediaElement backend for loading and\n * playback, giving also peaks, so the audio data are not decoded. In this way you can use WebAudio features, like filters,\n * also with audio with big duration. For example:\n * ` wavesurfer.load(url | HTMLMediaElement, peaks, preload, duration);\n * wavesurfer.play();\n * wavesurfer.setFilter(customFilter);\n * `\n * @property {string} backgroundColor=null Change background color of the\n * waveform container.\n * @property {number} barHeight=1 The height of the wave bars.\n * @property {number} barRadius=0 The radius of the wave bars. Makes bars rounded\n * @property {number} barGap=null The optional spacing between bars of the wave,\n * if not provided will be calculated in legacy format.\n * @property {number} barWidth=null Draw the waveform using bars.\n * @property {number} barMinHeight=null If specified, draw at least a bar of this height,\n * eliminating waveform gaps\n * @property {boolean} closeAudioContext=false Close and nullify all audio\n * contexts when the destroy method is called.\n * @property {!string|HTMLElement} container CSS selector or HTML element where\n * the waveform should be drawn. This is the only required parameter.\n * @property {string} cursorColor='#333' The fill color of the cursor indicating\n * the playhead position.\n * @property {number} cursorWidth=1 Measured in pixels.\n * @property {object} drawingContextAttributes={desynchronized: false} Drawing context\n * attributes.\n * @property {number} duration=null Optional audio length so pre-rendered peaks\n * can be display immediately for example.\n * @property {boolean} fillParent=true Whether to fill the entire container or\n * draw only according to `minPxPerSec`.\n * @property {boolean} forceDecode=false Force decoding of audio using web audio\n * when zooming to get a more detailed waveform.\n * @property {number} height=128 The height of the waveform. Measured in\n * pixels.\n * @property {boolean} hideScrollbar=false Whether to hide the horizontal\n * scrollbar when one would normally be shown.\n * @property {boolean} interact=true Whether the mouse interaction will be\n * enabled at initialization. You can switch this parameter at any time later\n * on.\n * @property {boolean} loopSelection=true (Use with regions plugin) Enable\n * looping of selected regions\n * @property {number} maxCanvasWidth=4000 Maximum width of a single canvas in\n * pixels, excluding a small overlap (2 * `pixelRatio`, rounded up to the next\n * even integer). If the waveform is longer than this value, additional canvases\n * will be used to render the waveform, which is useful for very large waveforms\n * that may be too wide for browsers to draw on a single canvas.\n * @property {boolean} mediaControls=false (Use with backend `MediaElement` or `MediaElementWebAudio`)\n * this enables the native controls for the media element\n * @property {string} mediaType='audio' (Use with backend `MediaElement` or `MediaElementWebAudio`)\n * `'audio'|'video'` ('video' only for `MediaElement`)\n * @property {number} minPxPerSec=20 Minimum number of pixels per second of\n * audio.\n * @property {boolean} normalize=false If true, normalize by the maximum peak\n * instead of 1.0.\n * @property {boolean} partialRender=false Use the PeakCache to improve\n * rendering speed of large waveforms\n * @property {number} pixelRatio=window.devicePixelRatio The pixel ratio used to\n * calculate display\n * @property {PluginDefinition[]} plugins=[] An array of plugin definitions to\n * register during instantiation, they will be directly initialised unless they\n * are added with the `deferInit` property set to true.\n * @property {string} progressColor='#555' The fill color of the part of the\n * waveform behind the cursor. When `progressColor` and `waveColor` are the same\n * the progress wave is not rendered at all.\n * @property {boolean} removeMediaElementOnDestroy=true Set to false to keep the\n * media element in the DOM when the player is destroyed. This is useful when\n * reusing an existing media element via the `loadMediaElement` method.\n * @property {Object} renderer=MultiCanvas Can be used to inject a custom\n * renderer.\n * @property {boolean|number} responsive=false If set to `true` resize the\n * waveform, when the window is resized. This is debounced with a `100ms`\n * timeout by default. If this parameter is a number it represents that timeout.\n * @property {boolean} rtl=false If set to `true`, renders waveform from\n * right-to-left.\n * @property {boolean} scrollParent=false Whether to scroll the container with a\n * lengthy waveform. Otherwise the waveform is shrunk to the container width\n * (see fillParent).\n * @property {number} skipLength=2 Number of seconds to skip with the\n * skipForward() and skipBackward() methods.\n * @property {boolean} splitChannels=false Render with separate waveforms for\n * the channels of the audio\n * @property {string} waveColor='#999' The fill color of the waveform after the\n * cursor.\n * @property {object} xhr={} XHR options. For example:\n * `let xhr = {\n * cache: 'default',\n * mode: 'cors',\n * method: 'GET',\n * credentials: 'same-origin',\n * redirect: 'follow',\n * referrer: 'client',\n * headers: [\n * {\n * key: 'Authorization',\n * value: 'my-token'\n * }\n * ]\n * };`\n */\n\n /**\n * @typedef {Object} PluginDefinition\n * @desc The Object used to describe a plugin\n * @example wavesurfer.addPlugin(pluginDefinition);\n * @property {string} name The name of the plugin, the plugin instance will be\n * added as a property to the wavesurfer instance under this name\n * @property {?Object} staticProps The properties that should be added to the\n * wavesurfer instance as static properties\n * @property {?boolean} deferInit Don't initialise plugin\n * automatically\n * @property {Object} params={} The plugin parameters, they are the first parameter\n * passed to the plugin class constructor function\n * @property {PluginClass} instance The plugin instance factory, is called with\n * the dependency specified in extends. Returns the plugin class.\n */\n\n /**\n * @interface PluginClass\n *\n * @desc This is the interface which is implemented by all plugin classes. Note\n * that this only turns into an observer after being passed through\n * `wavesurfer.addPlugin`.\n *\n * @extends {Observer}\n */\n var PluginClass =\n /*#__PURE__*/\n function () {\n _createClass(PluginClass, [{\n key: \"create\",\n\n /**\n * Plugin definition factory\n *\n * This function must be used to create a plugin definition which can be\n * used by wavesurfer to correctly instantiate the plugin.\n *\n * It returns a `PluginDefinition` object representing the plugin.\n *\n * @param {Object} params={} The plugin params (specific to the plugin)\n */\n value: function create(params) {}\n /**\n * Construct the plugin\n *\n * @param {Object} params={} The plugin params (specific to the plugin)\n * @param {Object} ws The wavesurfer instance\n */\n\n }]);\n\n function PluginClass(params, ws) {\n _classCallCheck(this, PluginClass);\n }\n /**\n * Initialise the plugin\n *\n * Start doing something. This is called by\n * `wavesurfer.initPlugin(pluginName)`\n */\n\n\n _createClass(PluginClass, [{\n key: \"init\",\n value: function init() {}\n /**\n * Destroy the plugin instance\n *\n * Stop doing something. This is called by\n * `wavesurfer.destroyPlugin(pluginName)`\n */\n\n }, {\n key: \"destroy\",\n value: function destroy() {}\n }]);\n\n return PluginClass;\n }();\n /**\n * WaveSurfer core library class\n *\n * @extends {Observer}\n * @example\n * const params = {\n * container: '#waveform',\n * waveColor: 'violet',\n * progressColor: 'purple'\n * };\n *\n * // initialise like this\n * const wavesurfer = WaveSurfer.create(params);\n *\n * // or like this ...\n * const wavesurfer = new WaveSurfer(params);\n * wavesurfer.init();\n *\n * // load audio file\n * wavesurfer.load('example/media/demo.wav');\n */\n\n\n var WaveSurfer =\n /*#__PURE__*/\n function (_util$Observer) {\n _inherits(WaveSurfer, _util$Observer);\n\n _createClass(WaveSurfer, null, [{\n key: \"create\",\n\n /** @private */\n\n /** @private */\n\n /**\n * Instantiate this class, call its `init` function and returns it\n *\n * @param {WavesurferParams} params The wavesurfer parameters\n * @return {Object} WaveSurfer instance\n * @example const wavesurfer = WaveSurfer.create(params);\n */\n value: function create(params) {\n var wavesurfer = new WaveSurfer(params);\n return wavesurfer.init();\n }\n /**\n * The library version number is available as a static property of the\n * WaveSurfer class\n *\n * @type {String}\n * @example\n * console.log('Using wavesurfer.js ' + WaveSurfer.VERSION);\n */\n\n }]);\n\n /**\n * Initialise wavesurfer instance\n *\n * @param {WavesurferParams} params Instantiation options for wavesurfer\n * @example\n * const wavesurfer = new WaveSurfer(params);\n * @returns {this} Wavesurfer instance\n */\n function WaveSurfer(params) {\n var _this;\n\n _classCallCheck(this, WaveSurfer);\n\n _this = _possibleConstructorReturn(this, _getPrototypeOf(WaveSurfer).call(this));\n /**\n * Extract relevant parameters (or defaults)\n * @private\n */\n\n _this.defaultParams = {\n audioContext: null,\n audioScriptProcessor: null,\n audioRate: 1,\n autoCenter: true,\n autoCenterRate: 5,\n autoCenterImmediately: false,\n backend: 'WebAudio',\n backgroundColor: null,\n barHeight: 1,\n barRadius: 0,\n barGap: null,\n barMinHeight: null,\n container: null,\n cursorColor: '#333',\n cursorWidth: 1,\n dragSelection: true,\n drawingContextAttributes: {\n // Boolean that hints the user agent to reduce the latency\n // by desynchronizing the canvas paint cycle from the event\n // loop\n desynchronized: false\n },\n duration: null,\n fillParent: true,\n forceDecode: false,\n height: 128,\n hideScrollbar: false,\n interact: true,\n loopSelection: true,\n maxCanvasWidth: 4000,\n mediaContainer: null,\n mediaControls: false,\n mediaType: 'audio',\n minPxPerSec: 20,\n normalize: false,\n partialRender: false,\n pixelRatio: window.devicePixelRatio || screen.deviceXDPI / screen.logicalXDPI,\n plugins: [],\n progressColor: '#555',\n removeMediaElementOnDestroy: true,\n renderer: _drawer.default,\n responsive: false,\n rtl: false,\n scrollParent: false,\n skipLength: 2,\n splitChannels: false,\n waveColor: '#999',\n xhr: {}\n };\n _this.backends = {\n MediaElement: _mediaelement.default,\n WebAudio: _webaudio.default,\n MediaElementWebAudio: _mediaelementWebaudio.default\n };\n _this.util = util;\n _this.params = Object.assign({}, _this.defaultParams, params);\n /** @private */\n\n _this.container = 'string' == typeof params.container ? document.querySelector(_this.params.container) : _this.params.container;\n\n if (!_this.container) {\n throw new Error('Container element not found');\n }\n\n if (_this.params.mediaContainer == null) {\n /** @private */\n _this.mediaContainer = _this.container;\n } else if (typeof _this.params.mediaContainer == 'string') {\n /** @private */\n _this.mediaContainer = document.querySelector(_this.params.mediaContainer);\n } else {\n /** @private */\n _this.mediaContainer = _this.params.mediaContainer;\n }\n\n if (!_this.mediaContainer) {\n throw new Error('Media Container element not found');\n }\n\n if (_this.params.maxCanvasWidth <= 1) {\n throw new Error('maxCanvasWidth must be greater than 1');\n } else if (_this.params.maxCanvasWidth % 2 == 1) {\n throw new Error('maxCanvasWidth must be an even number');\n }\n\n if (_this.params.rtl === true) {\n util.style(_this.container, {\n transform: 'rotateY(180deg)'\n });\n }\n\n if (_this.params.backgroundColor) {\n _this.setBackgroundColor(_this.params.backgroundColor);\n }\n /**\n * @private Used to save the current volume when muting so we can\n * restore once unmuted\n * @type {number}\n */\n\n\n _this.savedVolume = 0;\n /**\n * @private The current muted state\n * @type {boolean}\n */\n\n _this.isMuted = false;\n /**\n * @private Will hold a list of event descriptors that need to be\n * canceled on subsequent loads of audio\n * @type {Object[]}\n */\n\n _this.tmpEvents = [];\n /**\n * @private Holds any running audio downloads\n * @type {Observer}\n */\n\n _this.currentRequest = null;\n /** @private */\n\n _this.arraybuffer = null;\n /** @private */\n\n _this.drawer = null;\n /** @private */\n\n _this.backend = null;\n /** @private */\n\n _this.peakCache = null; // cache constructor objects\n\n if (typeof _this.params.renderer !== 'function') {\n throw new Error('Renderer parameter is invalid');\n }\n /**\n * @private The uninitialised Drawer class\n */\n\n\n _this.Drawer = _this.params.renderer;\n /**\n * @private The uninitialised Backend class\n */\n // Back compat\n\n if (_this.params.backend == 'AudioElement') {\n _this.params.backend = 'MediaElement';\n }\n\n if ((_this.params.backend == 'WebAudio' || _this.params.backend === 'MediaElementWebAudio') && !_webaudio.default.prototype.supportsWebAudio.call(null)) {\n _this.params.backend = 'MediaElement';\n }\n\n _this.Backend = _this.backends[_this.params.backend];\n /**\n * @private map of plugin names that are currently initialised\n */\n\n _this.initialisedPluginList = {};\n /** @private */\n\n _this.isDestroyed = false;\n /**\n * Get the current ready status.\n *\n * @example const isReady = wavesurfer.isReady;\n * @return {boolean}\n */\n\n _this.isReady = false; // responsive debounced event listener. If this.params.responsive is not\n // set, this is never called. Use 100ms or this.params.responsive as\n // timeout for the debounce function.\n\n var prevWidth = 0;\n _this._onResize = util.debounce(function () {\n if (prevWidth != _this.drawer.wrapper.clientWidth && !_this.params.scrollParent) {\n prevWidth = _this.drawer.wrapper.clientWidth;\n\n _this.drawer.fireEvent('redraw');\n }\n }, typeof _this.params.responsive === 'number' ? _this.params.responsive : 100);\n return _possibleConstructorReturn(_this, _assertThisInitialized(_this));\n }\n /**\n * Initialise the wave\n *\n * @example\n * var wavesurfer = new WaveSurfer(params);\n * wavesurfer.init();\n * @return {this} The wavesurfer instance\n */\n\n\n _createClass(WaveSurfer, [{\n key: \"init\",\n value: function init() {\n this.registerPlugins(this.params.plugins);\n this.createDrawer();\n this.createBackend();\n this.createPeakCache();\n return this;\n }\n /**\n * Add and initialise array of plugins (if `plugin.deferInit` is falsey),\n * this function is called in the init function of wavesurfer\n *\n * @param {PluginDefinition[]} plugins An array of plugin definitions\n * @emits {WaveSurfer#plugins-registered} Called with the array of plugin definitions\n * @return {this} The wavesurfer instance\n */\n\n }, {\n key: \"registerPlugins\",\n value: function registerPlugins(plugins) {\n var _this2 = this;\n\n // first instantiate all the plugins\n plugins.forEach(function (plugin) {\n return _this2.addPlugin(plugin);\n }); // now run the init functions\n\n plugins.forEach(function (plugin) {\n // call init function of the plugin if deferInit is falsey\n // in that case you would manually use initPlugins()\n if (!plugin.deferInit) {\n _this2.initPlugin(plugin.name);\n }\n });\n this.fireEvent('plugins-registered', plugins);\n return this;\n }\n /**\n * Get a map of plugin names that are currently initialised\n *\n * @example wavesurfer.getPlugins();\n * @return {Object} Object with plugin names\n */\n\n }, {\n key: \"getActivePlugins\",\n value: function getActivePlugins() {\n return this.initialisedPluginList;\n }\n /**\n * Add a plugin object to wavesurfer\n *\n * @param {PluginDefinition} plugin A plugin definition\n * @emits {WaveSurfer#plugin-added} Called with the name of the plugin that was added\n * @example wavesurfer.addPlugin(WaveSurfer.minimap());\n * @return {this} The wavesurfer instance\n */\n\n }, {\n key: \"addPlugin\",\n value: function addPlugin(plugin) {\n var _this3 = this;\n\n if (!plugin.name) {\n throw new Error('Plugin does not have a name!');\n }\n\n if (!plugin.instance) {\n throw new Error(\"Plugin \".concat(plugin.name, \" does not have an instance property!\"));\n } // staticProps properties are applied to wavesurfer instance\n\n\n if (plugin.staticProps) {\n Object.keys(plugin.staticProps).forEach(function (pluginStaticProp) {\n /**\n * Properties defined in a plugin definition's `staticProps` property are added as\n * staticProps properties of the WaveSurfer instance\n */\n _this3[pluginStaticProp] = plugin.staticProps[pluginStaticProp];\n });\n }\n\n var Instance = plugin.instance; // turn the plugin instance into an observer\n\n var observerPrototypeKeys = Object.getOwnPropertyNames(util.Observer.prototype);\n observerPrototypeKeys.forEach(function (key) {\n Instance.prototype[key] = util.Observer.prototype[key];\n });\n /**\n * Instantiated plugin classes are added as a property of the wavesurfer\n * instance\n * @type {Object}\n */\n\n this[plugin.name] = new Instance(plugin.params || {}, this);\n this.fireEvent('plugin-added', plugin.name);\n return this;\n }\n /**\n * Initialise a plugin\n *\n * @param {string} name A plugin name\n * @emits WaveSurfer#plugin-initialised\n * @example wavesurfer.initPlugin('minimap');\n * @return {this} The wavesurfer instance\n */\n\n }, {\n key: \"initPlugin\",\n value: function initPlugin(name) {\n if (!this[name]) {\n throw new Error(\"Plugin \".concat(name, \" has not been added yet!\"));\n }\n\n if (this.initialisedPluginList[name]) {\n // destroy any already initialised plugins\n this.destroyPlugin(name);\n }\n\n this[name].init();\n this.initialisedPluginList[name] = true;\n this.fireEvent('plugin-initialised', name);\n return this;\n }\n /**\n * Destroy a plugin\n *\n * @param {string} name A plugin name\n * @emits WaveSurfer#plugin-destroyed\n * @example wavesurfer.destroyPlugin('minimap');\n * @returns {this} The wavesurfer instance\n */\n\n }, {\n key: \"destroyPlugin\",\n value: function destroyPlugin(name) {\n if (!this[name]) {\n throw new Error(\"Plugin \".concat(name, \" has not been added yet and cannot be destroyed!\"));\n }\n\n if (!this.initialisedPluginList[name]) {\n throw new Error(\"Plugin \".concat(name, \" is not active and cannot be destroyed!\"));\n }\n\n if (typeof this[name].destroy !== 'function') {\n throw new Error(\"Plugin \".concat(name, \" does not have a destroy function!\"));\n }\n\n this[name].destroy();\n delete this.initialisedPluginList[name];\n this.fireEvent('plugin-destroyed', name);\n return this;\n }\n /**\n * Destroy all initialised plugins. Convenience function to use when\n * wavesurfer is removed\n *\n * @private\n */\n\n }, {\n key: \"destroyAllPlugins\",\n value: function destroyAllPlugins() {\n var _this4 = this;\n\n Object.keys(this.initialisedPluginList).forEach(function (name) {\n return _this4.destroyPlugin(name);\n });\n }\n /**\n * Create the drawer and draw the waveform\n *\n * @private\n * @emits WaveSurfer#drawer-created\n */\n\n }, {\n key: \"createDrawer\",\n value: function createDrawer() {\n var _this5 = this;\n\n this.drawer = new this.Drawer(this.container, this.params);\n this.drawer.init();\n this.fireEvent('drawer-created', this.drawer);\n\n if (this.params.responsive !== false) {\n window.addEventListener('resize', this._onResize, true);\n window.addEventListener('orientationchange', this._onResize, true);\n }\n\n this.drawer.on('redraw', function () {\n _this5.drawBuffer();\n\n _this5.drawer.progress(_this5.backend.getPlayedPercents());\n }); // Click-to-seek\n\n this.drawer.on('click', function (e, progress) {\n setTimeout(function () {\n return _this5.seekTo(progress);\n }, 0);\n }); // Relay the scroll event from the drawer\n\n this.drawer.on('scroll', function (e) {\n if (_this5.params.partialRender) {\n _this5.drawBuffer();\n }\n\n _this5.fireEvent('scroll', e);\n });\n }\n /**\n * Create the backend\n *\n * @private\n * @emits WaveSurfer#backend-created\n */\n\n }, {\n key: \"createBackend\",\n value: function createBackend() {\n var _this6 = this;\n\n if (this.backend) {\n this.backend.destroy();\n }\n\n this.backend = new this.Backend(this.params);\n this.backend.init();\n this.fireEvent('backend-created', this.backend);\n this.backend.on('finish', function () {\n _this6.drawer.progress(_this6.backend.getPlayedPercents());\n\n _this6.fireEvent('finish');\n });\n this.backend.on('play', function () {\n return _this6.fireEvent('play');\n });\n this.backend.on('pause', function () {\n return _this6.fireEvent('pause');\n });\n this.backend.on('audioprocess', function (time) {\n _this6.drawer.progress(_this6.backend.getPlayedPercents());\n\n _this6.fireEvent('audioprocess', time);\n }); // only needed for MediaElement and MediaElementWebAudio backend\n\n if (this.params.backend === 'MediaElement' || this.params.backend === 'MediaElementWebAudio') {\n this.backend.on('seek', function () {\n _this6.drawer.progress(_this6.backend.getPlayedPercents());\n });\n this.backend.on('volume', function () {\n var newVolume = _this6.getVolume();\n\n _this6.fireEvent('volume', newVolume);\n\n if (_this6.backend.isMuted !== _this6.isMuted) {\n _this6.isMuted = _this6.backend.isMuted;\n\n _this6.fireEvent('mute', _this6.isMuted);\n }\n });\n }\n }\n /**\n * Create the peak cache\n *\n * @private\n */\n\n }, {\n key: \"createPeakCache\",\n value: function createPeakCache() {\n if (this.params.partialRender) {\n this.peakCache = new _peakcache.default();\n }\n }\n /**\n * Get the duration of the audio clip\n *\n * @example const duration = wavesurfer.getDuration();\n * @return {number} Duration in seconds\n */\n\n }, {\n key: \"getDuration\",\n value: function getDuration() {\n return this.backend.getDuration();\n }\n /**\n * Get the current playback position\n *\n * @example const currentTime = wavesurfer.getCurrentTime();\n * @return {number} Playback position in seconds\n */\n\n }, {\n key: \"getCurrentTime\",\n value: function getCurrentTime() {\n return this.backend.getCurrentTime();\n }\n /**\n * Set the current play time in seconds.\n *\n * @param {number} seconds A positive number in seconds. E.g. 10 means 10\n * seconds, 60 means 1 minute\n */\n\n }, {\n key: \"setCurrentTime\",\n value: function setCurrentTime(seconds) {\n if (seconds >= this.getDuration()) {\n this.seekTo(1);\n } else {\n this.seekTo(seconds / this.getDuration());\n }\n }\n /**\n * Starts playback from the current position. Optional start and end\n * measured in seconds can be used to set the range of audio to play.\n *\n * @param {?number} start Position to start at\n * @param {?number} end Position to end at\n * @emits WaveSurfer#interaction\n * @return {Promise} Result of the backend play method\n * @example\n * // play from second 1 to 5\n * wavesurfer.play(1, 5);\n */\n\n }, {\n key: \"play\",\n value: function play(start, end) {\n var _this7 = this;\n\n this.fireEvent('interaction', function () {\n return _this7.play(start, end);\n });\n return this.backend.play(start, end);\n }\n /**\n * Set a point in seconds for playback to stop at.\n *\n * @param {number} position Position (in seconds) to stop at\n * @version 3.3.0\n */\n\n }, {\n key: \"setPlayEnd\",\n value: function setPlayEnd(position) {\n this.backend.setPlayEnd(position);\n }\n /**\n * Stops and pauses playback\n *\n * @example wavesurfer.pause();\n * @return {Promise} Result of the backend pause method\n */\n\n }, {\n key: \"pause\",\n value: function pause() {\n if (!this.backend.isPaused()) {\n return this.backend.pause();\n }\n }\n /**\n * Toggle playback\n *\n * @example wavesurfer.playPause();\n * @return {Promise} Result of the backend play or pause method\n */\n\n }, {\n key: \"playPause\",\n value: function playPause() {\n return this.backend.isPaused() ? this.play() : this.pause();\n }\n /**\n * Get the current playback state\n *\n * @example const isPlaying = wavesurfer.isPlaying();\n * @return {boolean} False if paused, true if playing\n */\n\n }, {\n key: \"isPlaying\",\n value: function isPlaying() {\n return !this.backend.isPaused();\n }\n /**\n * Skip backward\n *\n * @param {?number} seconds Amount to skip back, if not specified `skipLength`\n * is used\n * @example wavesurfer.skipBackward();\n */\n\n }, {\n key: \"skipBackward\",\n value: function skipBackward(seconds) {\n this.skip(-seconds || -this.params.skipLength);\n }\n /**\n * Skip forward\n *\n * @param {?number} seconds Amount to skip back, if not specified `skipLength`\n * is used\n * @example wavesurfer.skipForward();\n */\n\n }, {\n key: \"skipForward\",\n value: function skipForward(seconds) {\n this.skip(seconds || this.params.skipLength);\n }\n /**\n * Skip a number of seconds from the current position (use a negative value\n * to go backwards).\n *\n * @param {number} offset Amount to skip back or forwards\n * @example\n * // go back 2 seconds\n * wavesurfer.skip(-2);\n */\n\n }, {\n key: \"skip\",\n value: function skip(offset) {\n var duration = this.getDuration() || 1;\n var position = this.getCurrentTime() || 0;\n position = Math.max(0, Math.min(duration, position + (offset || 0)));\n this.seekAndCenter(position / duration);\n }\n /**\n * Seeks to a position and centers the view\n *\n * @param {number} progress Between 0 (=beginning) and 1 (=end)\n * @example\n * // seek and go to the middle of the audio\n * wavesurfer.seekTo(0.5);\n */\n\n }, {\n key: \"seekAndCenter\",\n value: function seekAndCenter(progress) {\n this.seekTo(progress);\n this.drawer.recenter(progress);\n }\n /**\n * Seeks to a position\n *\n * @param {number} progress Between 0 (=beginning) and 1 (=end)\n * @emits WaveSurfer#interaction\n * @emits WaveSurfer#seek\n * @example\n * // seek to the middle of the audio\n * wavesurfer.seekTo(0.5);\n */\n\n }, {\n key: \"seekTo\",\n value: function seekTo(progress) {\n var _this8 = this;\n\n // return an error if progress is not a number between 0 and 1\n if (typeof progress !== 'number' || !isFinite(progress) || progress < 0 || progress > 1) {\n throw new Error('Error calling wavesurfer.seekTo, parameter must be a number between 0 and 1!');\n }\n\n this.fireEvent('interaction', function () {\n return _this8.seekTo(progress);\n });\n var paused = this.backend.isPaused(); // avoid draw wrong position while playing backward seeking\n\n if (!paused) {\n this.backend.pause();\n } // avoid small scrolls while paused seeking\n\n\n var oldScrollParent = this.params.scrollParent;\n this.params.scrollParent = false;\n this.backend.seekTo(progress * this.getDuration());\n this.drawer.progress(progress);\n\n if (!paused) {\n this.backend.play();\n }\n\n this.params.scrollParent = oldScrollParent;\n this.fireEvent('seek', progress);\n }\n /**\n * Stops and goes to the beginning.\n *\n * @example wavesurfer.stop();\n */\n\n }, {\n key: \"stop\",\n value: function stop() {\n this.pause();\n this.seekTo(0);\n this.drawer.progress(0);\n }\n /**\n * Sets the ID of the audio device to use for output and returns a Promise.\n *\n * @param {string} deviceId String value representing underlying output\n * device\n * @returns {Promise} `Promise` that resolves to `undefined` when there are\n * no errors detected.\n */\n\n }, {\n key: \"setSinkId\",\n value: function setSinkId(deviceId) {\n return this.backend.setSinkId(deviceId);\n }\n /**\n * Set the playback volume.\n *\n * @param {number} newVolume A value between 0 and 1, 0 being no\n * volume and 1 being full volume.\n * @emits WaveSurfer#volume\n */\n\n }, {\n key: \"setVolume\",\n value: function setVolume(newVolume) {\n this.backend.setVolume(newVolume);\n this.fireEvent('volume', newVolume);\n }\n /**\n * Get the playback volume.\n *\n * @return {number} A value between 0 and 1, 0 being no\n * volume and 1 being full volume.\n */\n\n }, {\n key: \"getVolume\",\n value: function getVolume() {\n return this.backend.getVolume();\n }\n /**\n * Set the playback rate.\n *\n * @param {number} rate A positive number. E.g. 0.5 means half the normal\n * speed, 2 means double speed and so on.\n * @example wavesurfer.setPlaybackRate(2);\n */\n\n }, {\n key: \"setPlaybackRate\",\n value: function setPlaybackRate(rate) {\n this.backend.setPlaybackRate(rate);\n }\n /**\n * Get the playback rate.\n *\n * @return {number} The current playback rate.\n */\n\n }, {\n key: \"getPlaybackRate\",\n value: function getPlaybackRate() {\n return this.backend.getPlaybackRate();\n }\n /**\n * Toggle the volume on and off. If not currently muted it will save the\n * current volume value and turn the volume off. If currently muted then it\n * will restore the volume to the saved value, and then rest the saved\n * value.\n *\n * @example wavesurfer.toggleMute();\n */\n\n }, {\n key: \"toggleMute\",\n value: function toggleMute() {\n this.setMute(!this.isMuted);\n }\n /**\n * Enable or disable muted audio\n *\n * @param {boolean} mute Specify `true` to mute audio.\n * @emits WaveSurfer#volume\n * @emits WaveSurfer#mute\n * @example\n * // unmute\n * wavesurfer.setMute(false);\n * console.log(wavesurfer.getMute()) // logs false\n */\n\n }, {\n key: \"setMute\",\n value: function setMute(mute) {\n // ignore all muting requests if the audio is already in that state\n if (mute === this.isMuted) {\n this.fireEvent('mute', this.isMuted);\n return;\n }\n\n if (mute) {\n // If currently not muted then save current volume,\n // turn off the volume and update the mute properties\n this.savedVolume = this.backend.getVolume();\n this.backend.setVolume(0);\n this.isMuted = true;\n this.fireEvent('volume', 0);\n } else {\n // If currently muted then restore to the saved volume\n // and update the mute properties\n this.backend.setVolume(this.savedVolume);\n this.isMuted = false;\n this.fireEvent('volume', this.savedVolume);\n }\n\n this.fireEvent('mute', this.isMuted);\n }\n /**\n * Get the current mute status.\n *\n * @example const isMuted = wavesurfer.getMute();\n * @return {boolean} Current mute status\n */\n\n }, {\n key: \"getMute\",\n value: function getMute() {\n return this.isMuted;\n }\n /**\n * Get the list of current set filters as an array.\n *\n * Filters must be set with setFilters method first\n *\n * @return {array} List of enabled filters\n */\n\n }, {\n key: \"getFilters\",\n value: function getFilters() {\n return this.backend.filters || [];\n }\n /**\n * Toggles `scrollParent` and redraws\n *\n * @example wavesurfer.toggleScroll();\n */\n\n }, {\n key: \"toggleScroll\",\n value: function toggleScroll() {\n this.params.scrollParent = !this.params.scrollParent;\n this.drawBuffer();\n }\n /**\n * Toggle mouse interaction\n *\n * @example wavesurfer.toggleInteraction();\n */\n\n }, {\n key: \"toggleInteraction\",\n value: function toggleInteraction() {\n this.params.interact = !this.params.interact;\n }\n /**\n * Get the fill color of the waveform after the cursor.\n *\n * @return {string} A CSS color string.\n */\n\n }, {\n key: \"getWaveColor\",\n value: function getWaveColor() {\n return this.params.waveColor;\n }\n /**\n * Set the fill color of the waveform after the cursor.\n *\n * @param {string} color A CSS color string.\n * @example wavesurfer.setWaveColor('#ddd');\n */\n\n }, {\n key: \"setWaveColor\",\n value: function setWaveColor(color) {\n this.params.waveColor = color;\n this.drawBuffer();\n }\n /**\n * Get the fill color of the waveform behind the cursor.\n *\n * @return {string} A CSS color string.\n */\n\n }, {\n key: \"getProgressColor\",\n value: function getProgressColor() {\n return this.params.progressColor;\n }\n /**\n * Set the fill color of the waveform behind the cursor.\n *\n * @param {string} color A CSS color string.\n * @example wavesurfer.setProgressColor('#400');\n */\n\n }, {\n key: \"setProgressColor\",\n value: function setProgressColor(color) {\n this.params.progressColor = color;\n this.drawBuffer();\n }\n /**\n * Get the background color of the waveform container.\n *\n * @return {string} A CSS color string.\n */\n\n }, {\n key: \"getBackgroundColor\",\n value: function getBackgroundColor() {\n return this.params.backgroundColor;\n }\n /**\n * Set the background color of the waveform container.\n *\n * @param {string} color A CSS color string.\n * @example wavesurfer.setBackgroundColor('#FF00FF');\n */\n\n }, {\n key: \"setBackgroundColor\",\n value: function setBackgroundColor(color) {\n this.params.backgroundColor = color;\n util.style(this.container, {\n background: this.params.backgroundColor\n });\n }\n /**\n * Get the fill color of the cursor indicating the playhead\n * position.\n *\n * @return {string} A CSS color string.\n */\n\n }, {\n key: \"getCursorColor\",\n value: function getCursorColor() {\n return this.params.cursorColor;\n }\n /**\n * Set the fill color of the cursor indicating the playhead\n * position.\n *\n * @param {string} color A CSS color string.\n * @example wavesurfer.setCursorColor('#222');\n */\n\n }, {\n key: \"setCursorColor\",\n value: function setCursorColor(color) {\n this.params.cursorColor = color;\n this.drawer.updateCursor();\n }\n /**\n * Get the height of the waveform.\n *\n * @return {number} Height measured in pixels.\n */\n\n }, {\n key: \"getHeight\",\n value: function getHeight() {\n return this.params.height;\n }\n /**\n * Set the height of the waveform.\n *\n * @param {number} height Height measured in pixels.\n * @example wavesurfer.setHeight(200);\n */\n\n }, {\n key: \"setHeight\",\n value: function setHeight(height) {\n this.params.height = height;\n this.drawer.setHeight(height * this.params.pixelRatio);\n this.drawBuffer();\n }\n /**\n * Get the correct peaks for current wave view-port and render wave\n *\n * @private\n * @emits WaveSurfer#redraw\n */\n\n }, {\n key: \"drawBuffer\",\n value: function drawBuffer() {\n var nominalWidth = Math.round(this.getDuration() * this.params.minPxPerSec * this.params.pixelRatio);\n var parentWidth = this.drawer.getWidth();\n var width = nominalWidth; // always start at 0 after zooming for scrolling : issue redraw left part\n\n var start = 0;\n var end = Math.max(start + parentWidth, width); // Fill container\n\n if (this.params.fillParent && (!this.params.scrollParent || nominalWidth < parentWidth)) {\n width = parentWidth;\n start = 0;\n end = width;\n }\n\n var peaks;\n\n if (this.params.partialRender) {\n var newRanges = this.peakCache.addRangeToPeakCache(width, start, end);\n var i;\n\n for (i = 0; i < newRanges.length; i++) {\n peaks = this.backend.getPeaks(width, newRanges[i][0], newRanges[i][1]);\n this.drawer.drawPeaks(peaks, width, newRanges[i][0], newRanges[i][1]);\n }\n } else {\n peaks = this.backend.getPeaks(width, start, end);\n this.drawer.drawPeaks(peaks, width, start, end);\n }\n\n this.fireEvent('redraw', peaks, width);\n }\n /**\n * Horizontally zooms the waveform in and out. It also changes the parameter\n * `minPxPerSec` and enables the `scrollParent` option. Calling the function\n * with a falsey parameter will reset the zoom state.\n *\n * @param {?number} pxPerSec Number of horizontal pixels per second of\n * audio, if none is set the waveform returns to unzoomed state\n * @emits WaveSurfer#zoom\n * @example wavesurfer.zoom(20);\n */\n\n }, {\n key: \"zoom\",\n value: function zoom(pxPerSec) {\n if (!pxPerSec) {\n this.params.minPxPerSec = this.defaultParams.minPxPerSec;\n this.params.scrollParent = false;\n } else {\n this.params.minPxPerSec = pxPerSec;\n this.params.scrollParent = true;\n }\n\n this.drawBuffer();\n this.drawer.progress(this.backend.getPlayedPercents());\n this.drawer.recenter(this.getCurrentTime() / this.getDuration());\n this.fireEvent('zoom', pxPerSec);\n }\n /**\n * Decode buffer and load\n *\n * @private\n * @param {ArrayBuffer} arraybuffer Buffer to process\n */\n\n }, {\n key: \"loadArrayBuffer\",\n value: function loadArrayBuffer(arraybuffer) {\n var _this9 = this;\n\n this.decodeArrayBuffer(arraybuffer, function (data) {\n if (!_this9.isDestroyed) {\n _this9.loadDecodedBuffer(data);\n }\n });\n }\n /**\n * Directly load an externally decoded AudioBuffer\n *\n * @private\n * @param {AudioBuffer} buffer Buffer to process\n * @emits WaveSurfer#ready\n */\n\n }, {\n key: \"loadDecodedBuffer\",\n value: function loadDecodedBuffer(buffer) {\n this.backend.load(buffer);\n this.drawBuffer();\n this.isReady = true;\n this.fireEvent('ready');\n }\n /**\n * Loads audio data from a Blob or File object\n *\n * @param {Blob|File} blob Audio data\n * @example\n */\n\n }, {\n key: \"loadBlob\",\n value: function loadBlob(blob) {\n var _this10 = this;\n\n // Create file reader\n var reader = new FileReader();\n reader.addEventListener('progress', function (e) {\n return _this10.onProgress(e);\n });\n reader.addEventListener('load', function (e) {\n return _this10.loadArrayBuffer(e.target.result);\n });\n reader.addEventListener('error', function () {\n return _this10.fireEvent('error', 'Error reading file');\n });\n reader.readAsArrayBuffer(blob);\n this.empty();\n }\n /**\n * Loads audio and re-renders the waveform.\n *\n * @param {string|HTMLMediaElement} url The url of the audio file or the\n * audio element with the audio\n * @param {number[]|Number.} peaks Wavesurfer does not have to decode\n * the audio to render the waveform if this is specified\n * @param {?string} preload (Use with backend `MediaElement` and `MediaElementWebAudio`)\n * `'none'|'metadata'|'auto'` Preload attribute for the media element\n * @param {?number} duration The duration of the audio. This is used to\n * render the peaks data in the correct size for the audio duration (as\n * befits the current `minPxPerSec` and zoom value) without having to decode\n * the audio.\n * @returns {void}\n * @throws Will throw an error if the `url` argument is empty.\n * @example\n * // uses fetch or media element to load file (depending on backend)\n * wavesurfer.load('http://example.com/demo.wav');\n *\n * // setting preload attribute with media element backend and supplying\n * // peaks\n * wavesurfer.load(\n * 'http://example.com/demo.wav',\n * [0.0218, 0.0183, 0.0165, 0.0198, 0.2137, 0.2888],\n * true\n * );\n */\n\n }, {\n key: \"load\",\n value: function load(url, peaks, preload, duration) {\n if (!url) {\n throw new Error('url parameter cannot be empty');\n }\n\n this.empty();\n\n if (preload) {\n // check whether the preload attribute will be usable and if not log\n // a warning listing the reasons why not and nullify the variable\n var preloadIgnoreReasons = {\n \"Preload is not 'auto', 'none' or 'metadata'\": ['auto', 'metadata', 'none'].indexOf(preload) === -1,\n 'Peaks are not provided': !peaks,\n \"Backend is not of type 'MediaElement' or 'MediaElementWebAudio'\": ['MediaElement', 'MediaElementWebAudio'].indexOf(this.params.backend) === -1,\n 'Url is not of type string': typeof url !== 'string'\n };\n var activeReasons = Object.keys(preloadIgnoreReasons).filter(function (reason) {\n return preloadIgnoreReasons[reason];\n });\n\n if (activeReasons.length) {\n // eslint-disable-next-line no-console\n console.warn('Preload parameter of wavesurfer.load will be ignored because:\\n\\t- ' + activeReasons.join('\\n\\t- ')); // stop invalid values from being used\n\n preload = null;\n }\n }\n\n switch (this.params.backend) {\n case 'WebAudio':\n return this.loadBuffer(url, peaks, duration);\n\n case 'MediaElement':\n case 'MediaElementWebAudio':\n return this.loadMediaElement(url, peaks, preload, duration);\n }\n }\n /**\n * Loads audio using Web Audio buffer backend.\n *\n * @private\n * @param {string} url URL of audio file\n * @param {number[]|Number.} peaks Peaks data\n * @param {?number} duration Optional duration of audio file\n * @returns {void}\n */\n\n }, {\n key: \"loadBuffer\",\n value: function loadBuffer(url, peaks, duration) {\n var _this11 = this;\n\n var load = function load(action) {\n if (action) {\n _this11.tmpEvents.push(_this11.once('ready', action));\n }\n\n return _this11.getArrayBuffer(url, function (data) {\n return _this11.loadArrayBuffer(data);\n });\n };\n\n if (peaks) {\n this.backend.setPeaks(peaks, duration);\n this.drawBuffer();\n this.tmpEvents.push(this.once('interaction', load));\n } else {\n return load();\n }\n }\n /**\n * Either create a media element, or load an existing media element.\n *\n * @private\n * @param {string|HTMLMediaElement} urlOrElt Either a path to a media file, or an\n * existing HTML5 Audio/Video Element\n * @param {number[]|Number.} peaks Array of peaks. Required to bypass web audio\n * dependency\n * @param {?boolean} preload Set to true if the preload attribute of the\n * audio element should be enabled\n * @param {?number} duration Optional duration of audio file\n */\n\n }, {\n key: \"loadMediaElement\",\n value: function loadMediaElement(urlOrElt, peaks, preload, duration) {\n var _this12 = this;\n\n var url = urlOrElt;\n\n if (typeof urlOrElt === 'string') {\n this.backend.load(url, this.mediaContainer, peaks, preload);\n } else {\n var elt = urlOrElt;\n this.backend.loadElt(elt, peaks); // If peaks are not provided,\n // url = element.src so we can get peaks with web audio\n\n url = elt.src;\n }\n\n this.tmpEvents.push(this.backend.once('canplay', function () {\n // ignore when backend was already destroyed\n if (!_this12.backend.destroyed) {\n _this12.drawBuffer();\n\n _this12.isReady = true;\n\n _this12.fireEvent('ready');\n }\n }), this.backend.once('error', function (err) {\n return _this12.fireEvent('error', err);\n })); // If no pre-decoded peaks provided or pre-decoded peaks are\n // provided with forceDecode flag, attempt to download the\n // audio file and decode it with Web Audio.\n\n if (peaks) {\n this.backend.setPeaks(peaks, duration);\n }\n\n if ((!peaks || this.params.forceDecode) && this.backend.supportsWebAudio()) {\n this.getArrayBuffer(url, function (arraybuffer) {\n _this12.decodeArrayBuffer(arraybuffer, function (buffer) {\n _this12.backend.buffer = buffer;\n\n _this12.backend.setPeaks(null);\n\n _this12.drawBuffer();\n\n _this12.fireEvent('waveform-ready');\n });\n });\n }\n }\n /**\n * Decode an array buffer and pass data to a callback\n *\n * @private\n * @param {Object} arraybuffer The array buffer to decode\n * @param {function} callback The function to call on complete\n */\n\n }, {\n key: \"decodeArrayBuffer\",\n value: function decodeArrayBuffer(arraybuffer, callback) {\n var _this13 = this;\n\n this.arraybuffer = arraybuffer;\n this.backend.decodeArrayBuffer(arraybuffer, function (data) {\n // Only use the decoded data if we haven't been destroyed or\n // another decode started in the meantime\n if (!_this13.isDestroyed && _this13.arraybuffer == arraybuffer) {\n callback(data);\n _this13.arraybuffer = null;\n }\n }, function () {\n return _this13.fireEvent('error', 'Error decoding audiobuffer');\n });\n }\n /**\n * Load an array buffer using fetch and pass the result to a callback\n *\n * @param {string} url The URL of the file object\n * @param {function} callback The function to call on complete\n * @returns {util.fetchFile} fetch call\n * @private\n */\n\n }, {\n key: \"getArrayBuffer\",\n value: function getArrayBuffer(url, callback) {\n var _this14 = this;\n\n var options = Object.assign({\n url: url,\n responseType: 'arraybuffer'\n }, this.params.xhr);\n var request = util.fetchFile(options);\n this.currentRequest = request;\n this.tmpEvents.push(request.on('progress', function (e) {\n _this14.onProgress(e);\n }), request.on('success', function (data) {\n callback(data);\n _this14.currentRequest = null;\n }), request.on('error', function (e) {\n _this14.fireEvent('error', e);\n\n _this14.currentRequest = null;\n }));\n return request;\n }\n /**\n * Called while the audio file is loading\n *\n * @private\n * @param {Event} e Progress event\n * @emits WaveSurfer#loading\n */\n\n }, {\n key: \"onProgress\",\n value: function onProgress(e) {\n var percentComplete;\n\n if (e.lengthComputable) {\n percentComplete = e.loaded / e.total;\n } else {\n // Approximate progress with an asymptotic\n // function, and assume downloads in the 1-3 MB range.\n percentComplete = e.loaded / (e.loaded + 1000000);\n }\n\n this.fireEvent('loading', Math.round(percentComplete * 100), e.target);\n }\n /**\n * Exports PCM data into a JSON array and opens in a new window.\n *\n * @param {number} length=1024 The scale in which to export the peaks\n * @param {number} accuracy=10000\n * @param {?boolean} noWindow Set to true to disable opening a new\n * window with the JSON\n * @param {number} start Start index\n * @param {number} end End index\n * @return {Promise} Promise that resolves with array of peaks\n */\n\n }, {\n key: \"exportPCM\",\n value: function exportPCM(length, accuracy, noWindow, start, end) {\n length = length || 1024;\n start = start || 0;\n accuracy = accuracy || 10000;\n noWindow = noWindow || false;\n var peaks = this.backend.getPeaks(length, start, end);\n var arr = [].map.call(peaks, function (val) {\n return Math.round(val * accuracy) / accuracy;\n });\n return new Promise(function (resolve, reject) {\n var json = JSON.stringify(arr);\n\n if (!noWindow) {\n window.open('data:application/json;charset=utf-8,' + encodeURIComponent(json));\n }\n\n resolve(json);\n });\n }\n /**\n * Save waveform image as data URI.\n *\n * The default format is `'image/png'`. Other supported types are\n * `'image/jpeg'` and `'image/webp'`.\n *\n * @param {string} format='image/png' A string indicating the image format.\n * The default format type is `'image/png'`.\n * @param {number} quality=1 A number between 0 and 1 indicating the image\n * quality to use for image formats that use lossy compression such as\n * `'image/jpeg'`` and `'image/webp'`.\n * @param {string} type Image data type to return. Either 'dataURL' (default)\n * or 'blob'.\n * @return {string|string[]|Promise} When using `'dataURL'` type this returns\n * a single data URL or an array of data URLs, one for each canvas. When using\n * `'blob'` type this returns a `Promise` resolving with an array of `Blob`\n * instances, one for each canvas.\n */\n\n }, {\n key: \"exportImage\",\n value: function exportImage(format, quality, type) {\n if (!format) {\n format = 'image/png';\n }\n\n if (!quality) {\n quality = 1;\n }\n\n if (!type) {\n type = 'dataURL';\n }\n\n return this.drawer.getImage(format, quality, type);\n }\n /**\n * Cancel any fetch request currently in progress\n */\n\n }, {\n key: \"cancelAjax\",\n value: function cancelAjax() {\n if (this.currentRequest && this.currentRequest.controller) {\n this.currentRequest.controller.abort();\n this.currentRequest = null;\n }\n }\n /**\n * @private\n */\n\n }, {\n key: \"clearTmpEvents\",\n value: function clearTmpEvents() {\n this.tmpEvents.forEach(function (e) {\n return e.un();\n });\n }\n /**\n * Display empty waveform.\n */\n\n }, {\n key: \"empty\",\n value: function empty() {\n if (!this.backend.isPaused()) {\n this.stop();\n this.backend.disconnectSource();\n }\n\n this.isReady = false;\n this.cancelAjax();\n this.clearTmpEvents(); // empty drawer\n\n this.drawer.progress(0);\n this.drawer.setWidth(0);\n this.drawer.drawPeaks({\n length: this.drawer.getWidth()\n }, 0);\n }\n /**\n * Remove events, elements and disconnect WebAudio nodes.\n *\n * @emits WaveSurfer#destroy\n */\n\n }, {\n key: \"destroy\",\n value: function destroy() {\n this.destroyAllPlugins();\n this.fireEvent('destroy');\n this.cancelAjax();\n this.clearTmpEvents();\n this.unAll();\n\n if (this.params.responsive !== false) {\n window.removeEventListener('resize', this._onResize, true);\n window.removeEventListener('orientationchange', this._onResize, true);\n }\n\n if (this.backend) {\n this.backend.destroy();\n }\n\n if (this.drawer) {\n this.drawer.destroy();\n }\n\n this.isDestroyed = true;\n this.isReady = false;\n this.arraybuffer = null;\n }\n }]);\n\n return WaveSurfer;\n }(util.Observer);\n\n exports.default = WaveSurfer;\n WaveSurfer.VERSION = \"3.3.3\";\n WaveSurfer.util = util;\n module.exports = exports.default;\n\n /***/ }),\n\n /***/ \"./src/webaudio.js\":\n /*!*************************!*\\\n !*** ./src/webaudio.js ***!\n \\*************************/\n /*! no static exports found */\n /***/ (function(module, exports, __webpack_require__) {\n\n \"use strict\";\n\n\n Object.defineProperty(exports, \"__esModule\", {\n value: true\n });\n exports.default = void 0;\n\n var util = _interopRequireWildcard(__webpack_require__(/*! ./util */ \"./src/util/index.js\"));\n\n function _getRequireWildcardCache() { if (typeof WeakMap !== \"function\") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }\n\n function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== \"object\" && typeof obj !== \"function\") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }\n\n function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\n function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }\n\n function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) { return call; } return _assertThisInitialized(self); }\n\n function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return self; }\n\n function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }\n\n function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\n function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n function _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function\"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }\n\n function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }\n\n// using constants to prevent someone writing the string wrong\n var PLAYING = 'playing';\n var PAUSED = 'paused';\n var FINISHED = 'finished';\n /**\n * WebAudio backend\n *\n * @extends {Observer}\n */\n\n var WebAudio =\n /*#__PURE__*/\n function (_util$Observer) {\n _inherits(WebAudio, _util$Observer);\n\n _createClass(WebAudio, [{\n key: \"supportsWebAudio\",\n\n /** scriptBufferSize: size of the processing buffer */\n\n /** audioContext: allows to process audio with WebAudio API */\n\n /** @private */\n\n /** @private */\n\n /**\n * Does the browser support this backend\n *\n * @return {boolean} Whether or not this browser supports this backend\n */\n value: function supportsWebAudio() {\n return !!(window.AudioContext || window.webkitAudioContext);\n }\n /**\n * Get the audio context used by this backend or create one\n *\n * @return {AudioContext} Existing audio context, or creates a new one\n */\n\n }, {\n key: \"getAudioContext\",\n value: function getAudioContext() {\n if (!window.WaveSurferAudioContext) {\n window.WaveSurferAudioContext = new (window.AudioContext || window.webkitAudioContext)();\n }\n\n return window.WaveSurferAudioContext;\n }\n /**\n * Get the offline audio context used by this backend or create one\n *\n * @param {number} sampleRate The sample rate to use\n * @return {OfflineAudioContext} Existing offline audio context, or creates\n * a new one\n */\n\n }, {\n key: \"getOfflineAudioContext\",\n value: function getOfflineAudioContext(sampleRate) {\n if (!window.WaveSurferOfflineAudioContext) {\n window.WaveSurferOfflineAudioContext = new (window.OfflineAudioContext || window.webkitOfflineAudioContext)(1, 2, sampleRate);\n }\n\n return window.WaveSurferOfflineAudioContext;\n }\n /**\n * Construct the backend\n *\n * @param {WavesurferParams} params Wavesurfer parameters\n */\n\n }]);\n\n function WebAudio(params) {\n var _this$stateBehaviors, _this$states;\n\n var _this;\n\n _classCallCheck(this, WebAudio);\n\n _this = _possibleConstructorReturn(this, _getPrototypeOf(WebAudio).call(this));\n /** @private */\n\n _this.audioContext = null;\n _this.offlineAudioContext = null;\n _this.stateBehaviors = (_this$stateBehaviors = {}, _defineProperty(_this$stateBehaviors, PLAYING, {\n init: function init() {\n this.addOnAudioProcess();\n },\n getPlayedPercents: function getPlayedPercents() {\n var duration = this.getDuration();\n return this.getCurrentTime() / duration || 0;\n },\n getCurrentTime: function getCurrentTime() {\n return this.startPosition + this.getPlayedTime();\n }\n }), _defineProperty(_this$stateBehaviors, PAUSED, {\n init: function init() {\n this.removeOnAudioProcess();\n },\n getPlayedPercents: function getPlayedPercents() {\n var duration = this.getDuration();\n return this.getCurrentTime() / duration || 0;\n },\n getCurrentTime: function getCurrentTime() {\n return this.startPosition;\n }\n }), _defineProperty(_this$stateBehaviors, FINISHED, {\n init: function init() {\n this.removeOnAudioProcess();\n this.fireEvent('finish');\n },\n getPlayedPercents: function getPlayedPercents() {\n return 1;\n },\n getCurrentTime: function getCurrentTime() {\n return this.getDuration();\n }\n }), _this$stateBehaviors);\n _this.params = params;\n /** ac: Audio Context instance */\n\n _this.ac = params.audioContext || (_this.supportsWebAudio() ? _this.getAudioContext() : {});\n /**@private */\n\n _this.lastPlay = _this.ac.currentTime;\n /** @private */\n\n _this.startPosition = 0;\n /** @private */\n\n _this.scheduledPause = null;\n /** @private */\n\n _this.states = (_this$states = {}, _defineProperty(_this$states, PLAYING, Object.create(_this.stateBehaviors[PLAYING])), _defineProperty(_this$states, PAUSED, Object.create(_this.stateBehaviors[PAUSED])), _defineProperty(_this$states, FINISHED, Object.create(_this.stateBehaviors[FINISHED])), _this$states);\n /** @private */\n\n _this.buffer = null;\n /** @private */\n\n _this.filters = [];\n /** gainNode: allows to control audio volume */\n\n _this.gainNode = null;\n /** @private */\n\n _this.mergedPeaks = null;\n /** @private */\n\n _this.offlineAc = null;\n /** @private */\n\n _this.peaks = null;\n /** @private */\n\n _this.playbackRate = 1;\n /** analyser: provides audio analysis information */\n\n _this.analyser = null;\n /** scriptNode: allows processing audio */\n\n _this.scriptNode = null;\n /** @private */\n\n _this.source = null;\n /** @private */\n\n _this.splitPeaks = [];\n /** @private */\n\n _this.state = null;\n /** @private */\n\n _this.explicitDuration = params.duration;\n /**\n * Boolean indicating if the backend was destroyed.\n */\n\n _this.destroyed = false;\n return _this;\n }\n /**\n * Initialise the backend, called in `wavesurfer.createBackend()`\n */\n\n\n _createClass(WebAudio, [{\n key: \"init\",\n value: function init() {\n this.createVolumeNode();\n this.createScriptNode();\n this.createAnalyserNode();\n this.setState(PAUSED);\n this.setPlaybackRate(this.params.audioRate);\n this.setLength(0);\n }\n /** @private */\n\n }, {\n key: \"disconnectFilters\",\n value: function disconnectFilters() {\n if (this.filters) {\n this.filters.forEach(function (filter) {\n filter && filter.disconnect();\n });\n this.filters = null; // Reconnect direct path\n\n this.analyser.connect(this.gainNode);\n }\n }\n /**\n * @private\n *\n * @param {string} state The new state\n */\n\n }, {\n key: \"setState\",\n value: function setState(state) {\n if (this.state !== this.states[state]) {\n this.state = this.states[state];\n this.state.init.call(this);\n }\n }\n /**\n * Unpacked `setFilters()`\n *\n * @param {...AudioNode} filters One or more filters to set\n */\n\n }, {\n key: \"setFilter\",\n value: function setFilter() {\n for (var _len = arguments.length, filters = new Array(_len), _key = 0; _key < _len; _key++) {\n filters[_key] = arguments[_key];\n }\n\n this.setFilters(filters);\n }\n /**\n * Insert custom Web Audio nodes into the graph\n *\n * @param {AudioNode[]} filters Packed filters array\n * @example\n * const lowpass = wavesurfer.backend.ac.createBiquadFilter();\n * wavesurfer.backend.setFilter(lowpass);\n */\n\n }, {\n key: \"setFilters\",\n value: function setFilters(filters) {\n // Remove existing filters\n this.disconnectFilters(); // Insert filters if filter array not empty\n\n if (filters && filters.length) {\n this.filters = filters; // Disconnect direct path before inserting filters\n\n this.analyser.disconnect(); // Connect each filter in turn\n\n filters.reduce(function (prev, curr) {\n prev.connect(curr);\n return curr;\n }, this.analyser).connect(this.gainNode);\n }\n }\n /** Create ScriptProcessorNode to process audio */\n\n }, {\n key: \"createScriptNode\",\n value: function createScriptNode() {\n if (this.params.audioScriptProcessor) {\n this.scriptNode = this.params.audioScriptProcessor;\n } else {\n if (this.ac.createScriptProcessor) {\n this.scriptNode = this.ac.createScriptProcessor(WebAudio.scriptBufferSize);\n } else {\n this.scriptNode = this.ac.createJavaScriptNode(WebAudio.scriptBufferSize);\n }\n }\n\n this.scriptNode.connect(this.ac.destination);\n }\n /** @private */\n\n }, {\n key: \"addOnAudioProcess\",\n value: function addOnAudioProcess() {\n var _this2 = this;\n\n this.scriptNode.onaudioprocess = function () {\n var time = _this2.getCurrentTime();\n\n if (time >= _this2.getDuration()) {\n _this2.setState(FINISHED);\n\n _this2.fireEvent('pause');\n } else if (time >= _this2.scheduledPause) {\n _this2.pause();\n } else if (_this2.state === _this2.states[PLAYING]) {\n _this2.fireEvent('audioprocess', time);\n }\n };\n }\n /** @private */\n\n }, {\n key: \"removeOnAudioProcess\",\n value: function removeOnAudioProcess() {\n this.scriptNode.onaudioprocess = function () {};\n }\n /** Create analyser node to perform audio analysis */\n\n }, {\n key: \"createAnalyserNode\",\n value: function createAnalyserNode() {\n this.analyser = this.ac.createAnalyser();\n this.analyser.connect(this.gainNode);\n }\n /**\n * Create the gain node needed to control the playback volume.\n *\n */\n\n }, {\n key: \"createVolumeNode\",\n value: function createVolumeNode() {\n // Create gain node using the AudioContext\n if (this.ac.createGain) {\n this.gainNode = this.ac.createGain();\n } else {\n this.gainNode = this.ac.createGainNode();\n } // Add the gain node to the graph\n\n\n this.gainNode.connect(this.ac.destination);\n }\n /**\n * Set the sink id for the media player\n *\n * @param {string} deviceId String value representing audio device id.\n * @returns {Promise} A Promise that resolves to `undefined` when there\n * are no errors.\n */\n\n }, {\n key: \"setSinkId\",\n value: function setSinkId(deviceId) {\n if (deviceId) {\n /**\n * The webaudio API doesn't currently support setting the device\n * output. Here we create an HTMLAudioElement, connect the\n * webaudio stream to that element and setSinkId there.\n */\n var audio = new window.Audio();\n\n if (!audio.setSinkId) {\n return Promise.reject(new Error('setSinkId is not supported in your browser'));\n }\n\n audio.autoplay = true;\n var dest = this.ac.createMediaStreamDestination();\n this.gainNode.disconnect();\n this.gainNode.connect(dest);\n audio.srcObject = dest.stream;\n return audio.setSinkId(deviceId);\n } else {\n return Promise.reject(new Error('Invalid deviceId: ' + deviceId));\n }\n }\n /**\n * Set the audio volume\n *\n * @param {number} value A floating point value between 0 and 1.\n */\n\n }, {\n key: \"setVolume\",\n value: function setVolume(value) {\n this.gainNode.gain.setValueAtTime(value, this.ac.currentTime);\n }\n /**\n * Get the current volume\n *\n * @return {number} value A floating point value between 0 and 1.\n */\n\n }, {\n key: \"getVolume\",\n value: function getVolume() {\n return this.gainNode.gain.value;\n }\n /**\n * Decode an array buffer and pass data to a callback\n *\n * @private\n * @param {ArrayBuffer} arraybuffer The array buffer to decode\n * @param {function} callback The function to call on complete.\n * @param {function} errback The function to call on error.\n */\n\n }, {\n key: \"decodeArrayBuffer\",\n value: function decodeArrayBuffer(arraybuffer, callback, errback) {\n if (!this.offlineAc) {\n this.offlineAc = this.getOfflineAudioContext(this.ac && this.ac.sampleRate ? this.ac.sampleRate : 44100);\n }\n\n this.offlineAc.decodeAudioData(arraybuffer, function (data) {\n return callback(data);\n }, errback);\n }\n /**\n * Set pre-decoded peaks\n *\n * @param {number[]|Number.} peaks Peaks data\n * @param {?number} duration Explicit duration\n */\n\n }, {\n key: \"setPeaks\",\n value: function setPeaks(peaks, duration) {\n if (duration != null) {\n this.explicitDuration = duration;\n }\n\n this.peaks = peaks;\n }\n /**\n * Set the rendered length (different from the length of the audio)\n *\n * @param {number} length The rendered length\n */\n\n }, {\n key: \"setLength\",\n value: function setLength(length) {\n // No resize, we can preserve the cached peaks.\n if (this.mergedPeaks && length == 2 * this.mergedPeaks.length - 1 + 2) {\n return;\n }\n\n this.splitPeaks = [];\n this.mergedPeaks = []; // Set the last element of the sparse array so the peak arrays are\n // appropriately sized for other calculations.\n\n var channels = this.buffer ? this.buffer.numberOfChannels : 1;\n var c;\n\n for (c = 0; c < channels; c++) {\n this.splitPeaks[c] = [];\n this.splitPeaks[c][2 * (length - 1)] = 0;\n this.splitPeaks[c][2 * (length - 1) + 1] = 0;\n }\n\n this.mergedPeaks[2 * (length - 1)] = 0;\n this.mergedPeaks[2 * (length - 1) + 1] = 0;\n }\n /**\n * Compute the max and min value of the waveform when broken into subranges.\n *\n * @param {number} length How many subranges to break the waveform into.\n * @param {number} first First sample in the required range.\n * @param {number} last Last sample in the required range.\n * @return {number[]|Number.} Array of 2* peaks or array of arrays of\n * peaks consisting of (max, min) values for each subrange.\n */\n\n }, {\n key: \"getPeaks\",\n value: function getPeaks(length, first, last) {\n if (this.peaks) {\n return this.peaks;\n }\n\n if (!this.buffer) {\n return [];\n }\n\n first = first || 0;\n last = last || length - 1;\n this.setLength(length);\n\n if (!this.buffer) {\n return this.params.splitChannels ? this.splitPeaks : this.mergedPeaks;\n }\n /**\n * The following snippet fixes a buffering data issue on the Safari\n * browser which returned undefined It creates the missing buffer based\n * on 1 channel, 4096 samples and the sampleRate from the current\n * webaudio context 4096 samples seemed to be the best fit for rendering\n * will review this code once a stable version of Safari TP is out\n */\n\n\n if (!this.buffer.length) {\n var newBuffer = this.createBuffer(1, 4096, this.sampleRate);\n this.buffer = newBuffer.buffer;\n }\n\n var sampleSize = this.buffer.length / length;\n var sampleStep = ~~(sampleSize / 10) || 1;\n var channels = this.buffer.numberOfChannels;\n var c;\n\n for (c = 0; c < channels; c++) {\n var peaks = this.splitPeaks[c];\n var chan = this.buffer.getChannelData(c);\n var i = void 0;\n\n for (i = first; i <= last; i++) {\n var start = ~~(i * sampleSize);\n var end = ~~(start + sampleSize);\n var min = 0;\n var max = 0;\n var j = void 0;\n\n for (j = start; j < end; j += sampleStep) {\n var value = chan[j];\n\n if (value > max) {\n max = value;\n }\n\n if (value < min) {\n min = value;\n }\n }\n\n peaks[2 * i] = max;\n peaks[2 * i + 1] = min;\n\n if (c == 0 || max > this.mergedPeaks[2 * i]) {\n this.mergedPeaks[2 * i] = max;\n }\n\n if (c == 0 || min < this.mergedPeaks[2 * i + 1]) {\n this.mergedPeaks[2 * i + 1] = min;\n }\n }\n }\n\n return this.params.splitChannels ? this.splitPeaks : this.mergedPeaks;\n }\n /**\n * Get the position from 0 to 1\n *\n * @return {number} Position\n */\n\n }, {\n key: \"getPlayedPercents\",\n value: function getPlayedPercents() {\n return this.state.getPlayedPercents.call(this);\n }\n /** @private */\n\n }, {\n key: \"disconnectSource\",\n value: function disconnectSource() {\n if (this.source) {\n this.source.disconnect();\n }\n }\n /**\n * This is called when wavesurfer is destroyed\n */\n\n }, {\n key: \"destroy\",\n value: function destroy() {\n if (!this.isPaused()) {\n this.pause();\n }\n\n this.unAll();\n this.buffer = null;\n this.destroyed = true;\n this.disconnectFilters();\n this.disconnectSource();\n this.gainNode.disconnect();\n this.scriptNode.disconnect();\n this.analyser.disconnect(); 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