waveform-playlist-nartj/lib/app.js

Multiple track web audio editor and player with waveform preview

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.init = init;
exports["default"] = _default;

var _lodash = _interopRequireDefault(require("lodash.assign"));

var _createElement = _interopRequireDefault(require("virtual-dom/create-element"));

var _eventEmitter = _interopRequireDefault(require("event-emitter"));

var _Playlist = _interopRequireDefault(require("./Playlist"));

require("regenerator-runtime");

require("regenerator-runtime/runtime.js");

function init() {
  var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
  var ee = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : (0, _eventEmitter["default"])();

  if (options.container === undefined) {
    throw new Error('DOM element container must be given.');
  }

  window.OfflineAudioContext = window.OfflineAudioContext || window.webkitOfflineAudioContext;
  window.AudioContext = window.AudioContext || window.webkitAudioContext;
  var audioContext = new window.AudioContext();
  var defaults = {
    ac: audioContext,
    sampleRate: audioContext.sampleRate,
    samplesPerPixel: 4096,
    mono: true,
    fadeType: 'logarithmic',
    exclSolo: false,
    timescale: false,
    controls: {
      show: false,
      width: 150
    },
    colors: {
      waveOutlineColor: 'white',
      timeColor: 'grey',
      fadeColor: 'black'
    },
    seekStyle: 'line',
    waveHeight: 128,
    state: 'cursor',
    zoomLevels: [512, 1024, 2048, 4096],
    annotationList: {
      annotations: [],
      controls: [],
      editable: false,
      linkEndpoints: false,
      isContinuousPlay: false
    },
    isAutomaticScroll: false
  };
  var config = (0, _lodash["default"])(defaults, options);
  var zoomIndex = config.zoomLevels.indexOf(config.samplesPerPixel);

  if (zoomIndex === -1) {
    throw new Error('initial samplesPerPixel must be included in array zoomLevels');
  }

  var playlist = new _Playlist["default"]();
  playlist.setSampleRate(config.sampleRate);
  playlist.setSamplesPerPixel(config.samplesPerPixel);
  playlist.setAudioContext(config.ac);
  playlist.setEventEmitter(ee);
  playlist.setUpEventEmitter();
  playlist.setTimeSelection(0, 0);
  playlist.setState(config.state);
  playlist.setControlOptions(config.controls);
  playlist.setWaveHeight(config.waveHeight);
  playlist.setColors(config.colors);
  playlist.setZoomLevels(config.zoomLevels);
  playlist.setZoomIndex(zoomIndex);
  playlist.setMono(config.mono);
  playlist.setExclSolo(config.exclSolo);
  playlist.setShowTimeScale(config.timescale);
  playlist.setSeekStyle(config.seekStyle);
  playlist.setAnnotations(config.annotationList);
  playlist.isAutomaticScroll = config.isAutomaticScroll;
  playlist.isContinuousPlay = config.isContinuousPlay;
  playlist.linkedEndpoints = config.linkedEndpoints; // take care of initial virtual dom rendering.

  var tree = playlist.render();
  var rootNode = (0, _createElement["default"])(tree);
  config.container.appendChild(rootNode);
  playlist.tree = tree;
  playlist.rootNode = rootNode;
  return playlist;
}

function _default() {
  var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
  var ee = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : (0, _eventEmitter["default"])();
  return init(options, ee);
}