kontainer-js/IsoBmff/Box/EditListBox.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 _from = require('babel-runtime/core-js/array/from');

var _from2 = _interopRequireDefault(_from);

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 _Box = require('./Box');

var _Box2 = _interopRequireDefault(_Box);

var _FullBox2 = require('./FullBox');

var _FullBox3 = _interopRequireDefault(_FullBox2);

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 EditListBox = function (_FullBox) {
  (0, _inherits3.default)(EditListBox, _FullBox);

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

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

      //console.log('--- EditListBox.serialize enter.');
      var props = this.props;
      var entries = props.entries;
      var bytesToWrite = this.version === 1 ? 8 : 4;

      var base = offset;

      base += (0, _get3.default)((0, _getPrototypeOf2.default)(EditListBox.prototype), 'serialize', this).call(this, buffer, base);

      base += _Writer2.default.writeNumber(entries.length, buffer, base, 4); // entry_count (32)
      entries.forEach(function (entry) {
        base += _Writer2.default.writeNumber(entry.segmentDuration, buffer, base, bytesToWrite); // segment_duration (32/64)
        base += _Writer2.default.writeNumber(entry.mediaTime, buffer, base, bytesToWrite); //  media_time (32/64)
        base += _Writer2.default.writeNumber(entry.mediaRate, buffer, base, 2); // media_rate_integer (16)
        base += _Writer2.default.writeNumber(0, buffer, base, 2); // media_rate_fraction=0 (16)
      });

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

      //console.log('--- EditListBox.serialize exit.');
      return this.size;
    }
  }], [{
    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,
          entryCount = void 0,
          segmentDuration = void 0,
          mediaTime = void 0,
          mediaRate = void 0;

      var _FullBox$parse = _FullBox3.default.parse(buffer, base);

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

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

      base += readBytesNum;

      var version = props.version;

      // entry_count (32)

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

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

      readBytesNum = _Reader$readNumber2[0];
      entryCount = _Reader$readNumber2[1];
      base += readBytesNum;

      var entries = (0, _from2.default)({ length: entryCount }, function () {
        return { segmentDuration: 0, mediaTime: 0, mediaRate: 0 };
      });
      var bytesToBeRead = props.version === 1 ? 8 : 4;

      entries.forEach(function (entry) {
        // segment_duration (32/64)

        var _Reader$readNumber3 = _Reader2.default.readNumber(buffer, base, bytesToBeRead);

        var _Reader$readNumber4 = (0, _slicedToArray3.default)(_Reader$readNumber3, 2);

        readBytesNum = _Reader$readNumber4[0];
        entry.segmentDuration = _Reader$readNumber4[1];
        base += readBytesNum;

        //  media_time (32/64)

        var _Reader$readNumber5 = _Reader2.default.readNumber(buffer, base, bytesToBeRead, true);

        var _Reader$readNumber6 = (0, _slicedToArray3.default)(_Reader$readNumber5, 2);

        readBytesNum = _Reader$readNumber6[0];
        entry.mediaTime = _Reader$readNumber6[1];
        base += readBytesNum;

        // media_rate_integer(16)

        var _Reader$readNumber7 = _Reader2.default.readNumber(buffer, base, 2);

        var _Reader$readNumber8 = (0, _slicedToArray3.default)(_Reader$readNumber7, 2);

        readBytesNum = _Reader$readNumber8[0];
        entry.mediaRate = _Reader$readNumber8[1];
        base += readBytesNum;

        base += 2; // skip media_rate_fraction=0 (16)
      });

      props.entries = entries;

      return [base - offset, props];
    }
  }]);
  return EditListBox;
}(_FullBox3.default);

exports.default = EditListBox;


EditListBox.COMPACT_NAME = 'elst';

EditListBox.propTypes = {
  entries: _PropTypes2.default.arrayOf(_PropTypes2.default.shape({
    segmentDuration: _PropTypes2.default.number,
    mediaTime: _PropTypes2.default.number,
    mediaRate: _PropTypes2.default.number
  }).isRequired)
};

EditListBox.spec = {
  container: 'edts',
  quantity: _Box2.default.QUANTITY_EXACTLY_ONE,
  mandatoryList: []
};