kontainer-js/IsoBmff/Box/FileTypeBox.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 _Box2 = require('./Box');

var _Box3 = _interopRequireDefault(_Box2);

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

var _PropTypes2 = _interopRequireDefault(_PropTypes);

var _Writer = require('../../core/Writer');

var _Writer2 = _interopRequireDefault(_Writer);

var _Reader = require('../../core/Reader');

var _Reader2 = _interopRequireDefault(_Reader);

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

var FileTypeBox = function (_Box) {
  (0, _inherits3.default)(FileTypeBox, _Box);

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

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

      //console.log('--- FileTypeBox.serialize enter.');
      var majorBrand = this.props.majorBrand;
      var minorVersion = this.props.minorVersion;
      var compatibleBrands = this.props.compatibleBrands;

      var base = offset;

      base += (0, _get3.default)((0, _getPrototypeOf2.default)(FileTypeBox.prototype), 'serialize', this).call(this, buffer, base);
      base += _Writer2.default.writeString(majorBrand, buffer, base, 4);
      base += _Writer2.default.writeNumber(minorVersion, buffer, base, 4);
      compatibleBrands.forEach(function (brand) {
        base += _Writer2.default.writeString(brand, buffer, base, 4);
      });

      (0, _get3.default)((0, _getPrototypeOf2.default)(FileTypeBox.prototype), 'setSize', this).call(this, base - offset, buffer, offset);

      //console.log(`--- FileTypeBox.serialize exit. size=${this.size}`);
      return this.size;
    }
  }], [{
    key: 'validate',
    value: function validate(context, props) {
      context.majorBrand = props.majorBrand;
      context.minorVersion = props.minorVersion;
      context.compatibleBrands = props.compatibleBrands;
    }
  }, {
    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,
          boxEnd = void 0,
          majorBrand = void 0,
          minorVersion = void 0,
          brand = void 0,
          compatibleBrands = void 0;

      var _Box$parse = _Box3.default.parse(buffer, base);

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

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

      base += readBytesNum;
      boxEnd = offset + props.size;

      var _Reader$readString = _Reader2.default.readString(buffer, base, 4);

      var _Reader$readString2 = (0, _slicedToArray3.default)(_Reader$readString, 2);

      readBytesNum = _Reader$readString2[0];
      majorBrand = _Reader$readString2[1];

      base += readBytesNum;

      var _Reader$readNumber = _Reader2.default.readNumber(buffer, base, 4);

      var _Reader$readNumber2 = (0, _slicedToArray3.default)(_Reader$readNumber, 2);

      readBytesNum = _Reader$readNumber2[0];
      minorVersion = _Reader$readNumber2[1];

      base += readBytesNum;

      props.majorBrand = majorBrand;
      props.minorVersion = minorVersion;
      compatibleBrands = props.compatibleBrands = [];
      while (base < boxEnd) {
        var _Reader$readString3 = _Reader2.default.readString(buffer, base, 4);

        var _Reader$readString4 = (0, _slicedToArray3.default)(_Reader$readString3, 2);

        readBytesNum = _Reader$readString4[0];
        brand = _Reader$readString4[1];

        compatibleBrands.push(brand);
        base += readBytesNum;
      }

      return [base - offset, props];
    }
  }]);
  return FileTypeBox;
}(_Box3.default);

exports.default = FileTypeBox;


FileTypeBox.COMPACT_NAME = 'ftyp';

FileTypeBox.propTypes = {
  majorBrand: _PropTypes2.default.string.isRequired,
  minorVersion: _PropTypes2.default.number,
  compatibleBrands: _PropTypes2.default.arrayOf(_PropTypes2.default.string)
};

FileTypeBox.defaultProps = {
  minorVersion: 0,
  compatibleBrands: []
};

FileTypeBox.spec = {
  container: 'file',
  quantity: _Box3.default.QUANTITY_EXACTLY_ONE,
  mandatoryList: []
};