kontainer-js/IsoBmff/Box/MediaHeaderBox.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 _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 MediaHeaderBox = function (_FullBox) {
  (0, _inherits3.default)(MediaHeaderBox, _FullBox);

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

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

      //console.log('--- MediaHeaderBox.serialize enter.');
      var props = this.props;
      var version = props.version;
      var creationTime = props.creationTime || new Date();
      var modificationTime = props.modificationTime || new Date();
      var timeScale = props.timeScale | 0;
      var duration = props.duration | 0;
      var language = props.language;
      var byteLength = version ? 8 : 4;

      var base = offset;

      base += (0, _get3.default)((0, _getPrototypeOf2.default)(MediaHeaderBox.prototype), 'serialize', this).call(this, buffer, base);
      base += _Writer2.default.writeNumber(_FullBox3.default.date2sec(creationTime), buffer, base, byteLength);
      base += _Writer2.default.writeNumber(_FullBox3.default.date2sec(modificationTime), buffer, base, byteLength);
      base += _Writer2.default.writeNumber(timeScale, buffer, base, 4);
      base += _Writer2.default.writeNumber(duration, buffer, base, byteLength);
      base += _Writer2.default.writeIso639Lang(language, buffer, base);
      base += _Writer2.default.writeNumber(0, buffer, base, 2);

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

      //console.log(`--- MediaHeaderBox.serialize exit. size=${this.size}`);
      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,
          byteLength = void 0,
          creationTime = void 0,
          modificationTime = void 0,
          timeScale = void 0,
          duration = void 0,
          language = 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;
      byteLength = props.version ? 8 : 4;

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

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

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

      base += readBytesNum;

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

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

      readBytesNum = _Reader$readNumber4[0];
      modificationTime = _Reader$readNumber4[1];

      base += readBytesNum;

      var _Reader$readNumber5 = _Reader2.default.readNumber(buffer, base, 4);

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

      readBytesNum = _Reader$readNumber6[0];
      timeScale = _Reader$readNumber6[1];

      base += readBytesNum;

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

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

      readBytesNum = _Reader$readNumber8[0];
      duration = _Reader$readNumber8[1];

      base += readBytesNum;

      var _Reader$readIso639Lan = _Reader2.default.readIso639Lang(buffer, base);

      var _Reader$readIso639Lan2 = (0, _slicedToArray3.default)(_Reader$readIso639Lan, 2);

      readBytesNum = _Reader$readIso639Lan2[0];
      language = _Reader$readIso639Lan2[1];

      base += readBytesNum;

      base += 2; // skip reserved

      props.creationTime = _FullBox3.default.sec2date(creationTime);
      props.modificationTime = _FullBox3.default.sec2date(modificationTime);
      props.timeScale = timeScale;
      props.duration = duration;
      props.language = language;

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

exports.default = MediaHeaderBox;


MediaHeaderBox.COMPACT_NAME = 'mdhd';

MediaHeaderBox.propTypes = {
  version: _PropTypes2.default.oneOf([0, 1]),
  creationTime: _PropTypes2.default.instanceOf(Date),
  modificationTime: _PropTypes2.default.instanceOf(Date),
  timeScale: _PropTypes2.default.number.isRequired,
  duration: _PropTypes2.default.number,
  language: _PropTypes2.default.string
};

MediaHeaderBox.defaultProps = {
  version: 0,
  creationTime: null,
  modificationTime: null,
  duration: 0xFFFFFFFF,
  language: 'eng'
};

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