kontainer-js/IsoBmff/Box/TrackFragmentHeaderBox.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 _TrackExtendsBox = require('./TrackExtendsBox');

var _TrackExtendsBox2 = _interopRequireDefault(_TrackExtendsBox);

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

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

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

      //console.log('--- TrackFragmentHeaderBox.serialize enter.');
      var props = this.props;
      var trackId = props.trackId;
      var baseDataOffset = props.baseDataOffset;
      var sampleDescriptionIndex = props.sampleDescriptionIndex;
      var defaultSampleDuration = props.defaultSampleDuration;
      var defaultSampleSize = props.defaultSampleSize;
      var defaultSampleFlags = _TrackExtendsBox2.default.encodeDefaultSampleFlags(props.defaultSampleFlags);

      var base = offset;

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

      base += _Writer2.default.writeNumber(trackId, buffer, base, 4);

      if (baseDataOffset !== void 0) {
        base += _Writer2.default.writeNumber(baseDataOffset, buffer, base, 8);
      }
      if (sampleDescriptionIndex !== void 0) {
        base += _Writer2.default.writeNumber(sampleDescriptionIndex, buffer, base, 4);
      }
      if (defaultSampleDuration !== void 0) {
        base += _Writer2.default.writeNumber(defaultSampleDuration, buffer, base, 4);
      }
      if (defaultSampleSize !== void 0) {
        base += _Writer2.default.writeNumber(defaultSampleSize, buffer, base, 4);
      }
      if (defaultSampleFlags !== void 0) {
        base += _Writer2.default.writeNumber(defaultSampleFlags, buffer, base, 4);
      }

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

      //console.log(`--- TrackFragmentHeaderBox.serialize exit. size=${this.size}`);
      return this.size;
    }
  }], [{
    key: 'encodeFlags',
    value: function encodeFlags(props) {
      var f = 0;
      if (props.baseDataOffset !== void 0) {
        f |= 1 << 0;
      }
      if (props.sampleDescriptionIndex !== void 0) {
        f |= 1 << 1;
      }
      if (props.defaultSampleDuration !== void 0) {
        f |= 1 << 3;
      }
      if (props.defaultSampleSize !== void 0) {
        f |= 1 << 4;
      }
      if (props.defaultSampleFlags !== void 0) {
        f |= 1 << 5;
      }
      if (props.durationIsEmpty) {
        f |= 1 << 16;
      }
      return f;
    }
  }, {
    key: 'decodeFlags',
    value: function decodeFlags(f) {
      var flags = {
        baseDataOffsetPresent: false,
        sampleDescriptionIndexPresent: false,
        defaultSampleDurationPresent: false,
        defaultSampleSizePresent: false,
        defaultSampleFlagsPresent: false,
        durationIsEmpty: false
      };
      if (f >> 0 & 0x01) {
        flags.baseDataOffsetPresent = true;
      }
      if (f >> 1 & 0x01) {
        flags.sampleDescriptionIndexPresent = true;
      }
      if (f >> 3 & 0x01) {
        flags.defaultSampleDurationPresent = true;
      }
      if (f >> 4 & 0x01) {
        flags.defaultSampleSizePresent = true;
      }
      if (f >> 5 & 0x01) {
        flags.defaultSampleFlagsPresent = true;
      }
      if (f >> 16 & 0x01) {
        flags.durationIsEmpty = 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,
          flags = void 0,
          trackId = void 0,
          baseDataOffset = void 0,
          sampleDescriptionIndex = void 0,
          defaultSampleDuration = void 0,
          defaultSampleSize = void 0,
          defaultSampleFlags = 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$readNumber = _Reader2.default.readNumber(buffer, base, 4);

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

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

      base += readBytesNum;
      props.trackId = trackId;

      flags = TrackFragmentHeaderBox.decodeFlags(props.flags);

      if (flags.baseDataOffsetPresent) {
        var _Reader$readNumber3 = _Reader2.default.readNumber(buffer, base, 8);

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

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

        base += readBytesNum;
        props.baseDataOffset = baseDataOffset;
      }

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

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

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

        base += readBytesNum;
        props.sampleDescriptionIndex = sampleDescriptionIndex;
      }

      if (flags.defaultSampleDurationPresent) {
        var _Reader$readNumber7 = _Reader2.default.readNumber(buffer, base, 4);

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

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

        base += readBytesNum;
        props.defaultSampleDuration = defaultSampleDuration;
      }

      if (flags.defaultSampleSizePresent) {
        var _Reader$readNumber9 = _Reader2.default.readNumber(buffer, base, 4);

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

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

        base += readBytesNum;
        props.defaultSampleSize = defaultSampleSize;
      }

      if (flags.defaultSampleFlagsPresent) {
        var _Reader$readNumber11 = _Reader2.default.readNumber(buffer, base, 4);

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

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

        base += readBytesNum;
        props.defaultSampleFlags = _TrackExtendsBox2.default.decodeDefaultSampleFlags(defaultSampleFlags);
      }

      props.durationIsEmpty = flags.durationIsEmpty;

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

exports.default = TrackFragmentHeaderBox;


TrackFragmentHeaderBox.COMPACT_NAME = 'tfhd';

TrackFragmentHeaderBox.propTypes = {
  trackId: _PropTypes2.default.number.isRequired,
  baseDataOffset: _PropTypes2.default.number,
  sampleDescriptionIndex: _PropTypes2.default.number,
  defaultSampleDuration: _PropTypes2.default.number,
  defaultSampleSize: _PropTypes2.default.number,
  defaultSampleFlags: _TrackExtendsBox2.default.DEFAULT_SAMPLE_FLAGS_PROPTYPES,
  durationIsEmpty: _PropTypes2.default.bool
};

_TrackExtendsBox2.default.defaultProps = {
  baseDataOffset: void 0,
  sampleDescriptionIndex: void 0,
  defaultSampleDuration: void 0,
  defaultSampleSize: void 0,
  defaultSampleFlags: void 0,
  durationIsEmpty: false
};

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