kontainer-js/IsoBmff/Box/SoundMediaHeaderBox.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);

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

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

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

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

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

      var props = this.props;
      var balance = props.balance;

      var base = offset;

      base += (0, _get3.default)((0, _getPrototypeOf2.default)(SoundMediaHeaderBox.prototype), 'serialize', this).call(this, buffer, base);
      base += _Writer2.default.writeFixedNumber(balance, buffer, base, 2);
      base += _Writer2.default.writeNumber(0, buffer, base, 2);

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

      return this.size;
    }
  }], [{
    key: 'validate',
    value: function validate(context) {
      var trackType = context.currentTrackType;
      if (trackType && trackType !== 'audio') {
        (0, _Util.throwException)('"' + SoundMediaHeaderBox.COMPACT_NAME + '" box cannot be placed within ' + trackType + ' track.');
      }
    }
  }, {
    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,
          balance = 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 _Reader$readFixedNumb = _Reader2.default.readFixedNumber(buffer, base, 2);

      var _Reader$readFixedNumb2 = (0, _slicedToArray3.default)(_Reader$readFixedNumb, 2);

      readBytesNum = _Reader$readFixedNumb2[0];
      balance = _Reader$readFixedNumb2[1];

      base += readBytesNum;

      base += 2; // skip reserved

      props.balance = balance;

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

exports.default = SoundMediaHeaderBox;


SoundMediaHeaderBox.COMPACT_NAME = 'smhd';

SoundMediaHeaderBox.propTypes = {
  version: _PropTypes2.default.oneOf([0, 1]),
  balance: _PropTypes2.default.number
};

SoundMediaHeaderBox.defaultProps = {
  version: 0,
  balance: 0
};

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