kontainer-js/IsoBmff/Box/MediaDataBox.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 _Buffer = require('../../core/Buffer');

var _Buffer2 = _interopRequireDefault(_Buffer);

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

var _Reader2 = _interopRequireDefault(_Reader);

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

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

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

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

      //console.log('--- MediaDataBox.serialize enter.');
      var data = this.props.data;

      var base = offset;

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

      if (buffer) {
        _Buffer2.default.wrap(buffer).copyFrom(data, 0, data.length, base);
      }
      base += data.length;

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

      //console.log(`--- MediaDataBox.serialize exit. size=${this.size}`);
      return this.size;
    }
  }], [{
    key: 'parse',
    value: function parse(buffer) {
      var offset = arguments.length <= 1 || arguments[1] === undefined ? -1 : arguments[1];

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

      var byteOffset = base;

      var toBeRead = props.size - readBytesNum;
      var available = buffer.length - base;
      var bytesToRead = Math.min(available, toBeRead);
      var buf = _Buffer2.default.wrap(buffer).copy(base, bytesToRead);
      var data = buf.getView();

      base += bytesToRead;

      props.data = data;
      props.byteOffset = byteOffset;

      if (available < toBeRead) {
        _Reader2.default.throwBufferReadException(props);
      }

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

exports.default = MediaDataBox;


MediaDataBox.COMPACT_NAME = 'mdat';

MediaDataBox.propTypes = {
  byteOffset: _PropTypes2.default.number,
  data: _PropTypes2.default.any.isRequired
};

MediaDataBox.defaultProps = {
  byteOffset: 0
};

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