kontainer-js/IsoBmff/Box/MPEG4BitRateBox.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 MPEG4BitRateBox = function (_Box) {
  (0, _inherits3.default)(MPEG4BitRateBox, _Box);

  function MPEG4BitRateBox(props) {
    (0, _classCallCheck3.default)(this, MPEG4BitRateBox);
    return (0, _possibleConstructorReturn3.default)(this, (0, _getPrototypeOf2.default)(MPEG4BitRateBox).call(this, MPEG4BitRateBox.COMPACT_NAME, props));
  }

  (0, _createClass3.default)(MPEG4BitRateBox, [{
    key: 'serialize',
    value: function serialize(buffer) {
      var offset = arguments.length <= 1 || arguments[1] === undefined ? 0 : arguments[1];

      //console.log('--- MPEG4BitRateBox.serialize enter.');
      var props = this.props;
      var bufferSizeDB = props.bufferSizeDB;
      var maxBitrate = props.maxBitrate;
      var avgBitrate = props.avgBitrate;

      var base = offset;

      base += (0, _get3.default)((0, _getPrototypeOf2.default)(MPEG4BitRateBox.prototype), 'serialize', this).call(this, buffer, base);
      base += _Writer2.default.writeNumber(bufferSizeDB, buffer, base, 4);
      base += _Writer2.default.writeNumber(maxBitrate, buffer, base, 4);
      base += _Writer2.default.writeNumber(avgBitrate, buffer, base, 4);

      (0, _get3.default)((0, _getPrototypeOf2.default)(MPEG4BitRateBox.prototype), 'setSize', this).call(this, base - offset, buffer, offset);

      //console.log(`--- MPEG4BitRateBox.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,
          bufferSizeDB = void 0,
          maxBitrate = void 0,
          avgBitrate = 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 _Reader$readNumber = _Reader2.default.readNumber(buffer, base, 4);

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

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

      base += readBytesNum;

      var _Reader$readNumber3 = _Reader2.default.readNumber(buffer, base, 4);

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

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

      base += readBytesNum;

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

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

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

      base += readBytesNum;

      props.bufferSizeDB = bufferSizeDB;
      props.maxBitrate = maxBitrate;
      props.avgBitrate = avgBitrate;

      return [base - offset, props];
    }
  }]);
  return MPEG4BitRateBox;
}(_Box3.default);

exports.default = MPEG4BitRateBox;


MPEG4BitRateBox.COMPACT_NAME = 'btrt';

MPEG4BitRateBox.propTypes = {
  bufferSizeDB: _PropTypes2.default.number.isRequired,
  maxBitrate: _PropTypes2.default.number.isRequired,
  avgBitrate: _PropTypes2.default.number.isRequired
};

MPEG4BitRateBox.spec = {
  container: 'avc1',
  quantity: _Box3.default.QUANTITY_EXACTLY_ONE,
  mandatoryList: []
};