kontainer-js/Matroska/EBMLElement/DisplayUnit.js

A media file format generator/parser that exposes a React-like API.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = undefined;

var _slicedToArray2 = require('babel-runtime/helpers/slicedToArray');

var _slicedToArray3 = _interopRequireDefault(_slicedToArray2);

var _getPrototypeOf = require('babel-runtime/core-js/object/get-prototype-of');

var _getPrototypeOf2 = _interopRequireDefault(_getPrototypeOf);

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _possibleConstructorReturn2 = require('babel-runtime/helpers/possibleConstructorReturn');

var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

var _get2 = require('babel-runtime/helpers/get');

var _get3 = _interopRequireDefault(_get2);

var _inherits2 = require('babel-runtime/helpers/inherits');

var _inherits3 = _interopRequireDefault(_inherits2);

var _Component = require('../../core/Component');

var _Component2 = _interopRequireDefault(_Component);

var _TypeUInt2 = require('./TypeUInt');

var _TypeUInt3 = _interopRequireDefault(_TypeUInt2);

var _PropTypes = require('../../core/PropTypes');

var _PropTypes2 = _interopRequireDefault(_PropTypes);

var _Util = require('../../core/Util');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function encodeValue(value) {
  switch (value) {
    case 'pixels':
      return 0;
    case 'centimeters':
      return 1;
    case 'inches':
      return 2;
    case 'aspectRatio':
      return 3;
  }
  (0, _Util.throwException)('Unknow display unit: (' + value + ')');
}

function decodeValue(value) {
  switch (value) {
    case 0:
      return 'pixels';
    case 1:
      return 'centimeters';
    case 2:
      return 'inches';
    case 3:
      return 'aspectRatio';
  }
  (0, _Util.throwException)('Unknow display unit: (' + value + ')');
}

var DisplayUnit = function (_TypeUInt) {
  (0, _inherits3.default)(DisplayUnit, _TypeUInt);

  function DisplayUnit(props) {
    (0, _classCallCheck3.default)(this, DisplayUnit);
    return (0, _possibleConstructorReturn3.default)(this, (0, _getPrototypeOf2.default)(DisplayUnit).call(this, DisplayUnit.ELEMENT_ID, DisplayUnit.COMPACT_NAME, props));
  }

  (0, _createClass3.default)(DisplayUnit, [{
    key: 'serialize',
    value: function serialize(buffer) {
      var offset = arguments.length <= 1 || arguments[1] === undefined ? 0 : arguments[1];

      var value = this.props.kind;

      var base = offset;

      this.props.value = encodeValue(value);
      base += (0, _get3.default)((0, _getPrototypeOf2.default)(DisplayUnit.prototype), 'serialize', this).call(this, buffer, base);

      return base - offset;
    }
  }], [{
    key: 'parse',
    value: function parse(buffer) {
      var offset = arguments.length <= 1 || arguments[1] === undefined ? 0 : arguments[1];

      var base = offset,
          readBytesNum = void 0,
          props = void 0;

      var _TypeUInt$parse = _TypeUInt3.default.parse(buffer, base);

      var _TypeUInt$parse2 = (0, _slicedToArray3.default)(_TypeUInt$parse, 2);

      readBytesNum = _TypeUInt$parse2[0];
      props = _TypeUInt$parse2[1];

      base += readBytesNum;

      props.kind = decodeValue(props.value);

      return [base - offset, props];
    }
  }]);
  return DisplayUnit;
}(_TypeUInt3.default);

exports.default = DisplayUnit;


DisplayUnit.COMPACT_NAME = 'DisplayUnit';

DisplayUnit.ELEMENT_ID = [0x54, 0xB2];

DisplayUnit.propTypes = {
  kind: _PropTypes2.default.oneOf(['pixels', 'centimeters', 'inches', 'aspectRatio'])
};

DisplayUnit.defaultProps = {
  kind: 'pixels'
};

DisplayUnit.spec = {
  container: 'Video',
  quantity: _Component2.default.QUANTITY_EXACTLY_ONE,
  mandatoryList: []
};