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

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

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

      //console.log('--- TrackHeaderBox.serialize enter.');
      var props = this.props;
      var version = props.version;
      var creationTime = props.creationTime || new Date();
      var modificationTime = props.modificationTime || new Date();
      var trackId = props.trackId | 0;
      var duration = props.duration | 0;
      var layer = props.layer;
      var alternateGroup = props.alternateGroup | 0;
      var volume = props.volume;
      var matrix = props.matrix;
      var width = props.width;
      var height = props.height;
      var byteLength = version ? 8 : 4;

      var base = offset;

      base += (0, _get3.default)((0, _getPrototypeOf2.default)(TrackHeaderBox.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(trackId, buffer, base, 4);
      base += _Writer2.default.writeNumber(0, buffer, base, 4);
      base += _Writer2.default.writeNumber(duration, buffer, base, byteLength);
      base += _Writer2.default.writeNumber(0, buffer, base, 8);
      base += _Writer2.default.writeNumber(layer, buffer, base, 2);
      base += _Writer2.default.writeNumber(alternateGroup, buffer, base, 2);
      base += _Writer2.default.writeFixedNumber(volume, buffer, base, 2);
      base += _Writer2.default.writeNumber(0, buffer, base, 2);
      for (var i = 0; i < 9; i++) {
        base += _Writer2.default.writeFixedNumber(matrix[i], buffer, base, 4);
      }
      base += _Writer2.default.writeFixedNumber(width, buffer, base, 4);
      base += _Writer2.default.writeFixedNumber(height, buffer, base, 4);

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

      //console.log(`--- TrackHeaderBox.serialize exit. size=${this.size}`);
      return this.size;
    }
  }], [{
    key: 'encodeFlags',
    value: function encodeFlags(flags) {
      var f = 0;
      if (flags.enabled) {
        f |= 0x01;
      }
      if (flags.inMovie) {
        f |= 0x02;
      }
      if (flags.inPreview) {
        f |= 0x04;
      }
      return f;
    }
  }, {
    key: 'decodeFlags',
    value: function decodeFlags(f) {
      var flags = {
        enabled: false,
        inMovie: false,
        inPreview: false
      };

      if (f & 0x01) {
        flags.enabled = true;
      }
      if (f & 0x02) {
        flags.inMovie = true;
      }
      if (f & 0x04) {
        flags.inPreview = true;
      }
      return flags;
    }
  }, {
    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,
          trackId = void 0,
          duration = void 0,
          layer = void 0,
          alternateGroup = void 0,
          volume = void 0,
          matrix = new Array(9),
          width = void 0,
          height = 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$readNumber6[0];
      trackId = _Reader$readNumber6[1];

      base += readBytesNum;

      base += 4; // skip reserved

      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;

      base += 8; // skip reserved

      var _Reader$readNumber9 = _Reader2.default.readNumber(buffer, base, 2);

      var _Reader$readNumber10 = (0, _slicedToArray3.default)(_Reader$readNumber9, 2);

      readBytesNum = _Reader$readNumber10[0];
      layer = _Reader$readNumber10[1];

      base += readBytesNum;

      var _Reader$readNumber11 = _Reader2.default.readNumber(buffer, base, 2);

      var _Reader$readNumber12 = (0, _slicedToArray3.default)(_Reader$readNumber11, 2);

      readBytesNum = _Reader$readNumber12[0];
      alternateGroup = _Reader$readNumber12[1];

      base += readBytesNum;

      var _Reader$readFixedNumb = _Reader2.default.readFixedNumber(buffer, base, 2);

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

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

      base += readBytesNum;

      base += 2; // skip reserved

      for (var i = 0; i < 9; i++) {
        var _Reader$readFixedNumb3 = _Reader2.default.readFixedNumber(buffer, base, 4);

        var _Reader$readFixedNumb4 = (0, _slicedToArray3.default)(_Reader$readFixedNumb3, 2);

        readBytesNum = _Reader$readFixedNumb4[0];
        matrix[i] = _Reader$readFixedNumb4[1];

        base += readBytesNum;
      }

      var _Reader$readFixedNumb5 = _Reader2.default.readFixedNumber(buffer, base, 4);

      var _Reader$readFixedNumb6 = (0, _slicedToArray3.default)(_Reader$readFixedNumb5, 2);

      readBytesNum = _Reader$readFixedNumb6[0];
      width = _Reader$readFixedNumb6[1];

      base += readBytesNum;

      var _Reader$readFixedNumb7 = _Reader2.default.readFixedNumber(buffer, base, 4);

      var _Reader$readFixedNumb8 = (0, _slicedToArray3.default)(_Reader$readFixedNumb7, 2);

      readBytesNum = _Reader$readFixedNumb8[0];
      height = _Reader$readFixedNumb8[1];

      base += readBytesNum;

      props.flags = TrackHeaderBox.decodeFlags(props.flags);
      props.creationTime = _FullBox3.default.sec2date(creationTime);
      props.modificationTime = _FullBox3.default.sec2date(modificationTime);
      props.trackId = trackId;
      props.duration = duration;
      props.layer = layer;
      props.alternateGroup = alternateGroup;
      props.volume = volume;
      props.matrix = matrix;
      props.width = width;
      props.height = height;

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

exports.default = TrackHeaderBox;


TrackHeaderBox.COMPACT_NAME = 'tkhd';

TrackHeaderBox.propTypes = {
  version: _PropTypes2.default.oneOf([0, 1]),
  flags: _PropTypes2.default.shape({
    enabled: _PropTypes2.default.bool,
    inMovie: _PropTypes2.default.bool,
    inPreview: _PropTypes2.default.bool
  }),
  creationTime: _PropTypes2.default.instanceOf(Date),
  modificationTime: _PropTypes2.default.instanceOf(Date),
  trackId: _PropTypes2.default.number.isRequired,
  duration: _PropTypes2.default.number,
  layer: _PropTypes2.default.number,
  alternateGroup: _PropTypes2.default.number,
  volume: _PropTypes2.default.number,
  matrix: _PropTypes2.default.arrayOf(_PropTypes2.default.number),
  width: _PropTypes2.default.number.isRequired,
  height: _PropTypes2.default.number.isRequired
};

TrackHeaderBox.defaultProps = {
  version: 0,
  flags: {
    enabled: true,
    inMovie: true,
    inPreview: false
  },
  creationTime: null,
  modificationTime: null,
  duration: 0xFFFFFFFF,
  layer: 0,
  alternateGroup: 0,
  volume: 1.0,
  matrix: [1, 0, 0, 0, 1, 0, 0, 0, 16384]
};

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