kontainer-js/IsoBmff/Box/AudioSampleEntry.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 _SampleEntry2 = require('./SampleEntry');

var _SampleEntry3 = _interopRequireDefault(_SampleEntry2);

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 AudioSampleEntry = function (_SampleEntry) {
  (0, _inherits3.default)(AudioSampleEntry, _SampleEntry);

  function AudioSampleEntry(type, props) {
    (0, _classCallCheck3.default)(this, AudioSampleEntry);
    return (0, _possibleConstructorReturn3.default)(this, (0, _getPrototypeOf2.default)(AudioSampleEntry).call(this, type, props, props.dataReferenceIndex));
  }

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

      //console.log('--- AudioSampleEntry.serialize enter.');
      var props = this.props;
      var channelCount = props.channelCount;
      var sampleSize = props.sampleSize;
      var sampleRate = props.sampleRate;

      var base = offset;

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

      base += _Writer2.default.writeNumber(0, buffer, base, 8); // reserved (32)[2]
      base += _Writer2.default.writeNumber(channelCount, buffer, base, 2);
      base += _Writer2.default.writeNumber(sampleSize, buffer, base, 2);
      base += _Writer2.default.writeNumber(0, buffer, base, 4); // reserved (32)
      base += _Writer2.default.writeFixedNumber(sampleRate, buffer, base, 4);

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

      //console.log('--- AudioSampleEntry.serialize exit.');
      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,
          channelCount = void 0,
          sampleSize = void 0,
          sampleRate = void 0;

      var _SampleEntry$parse = _SampleEntry3.default.parse(buffer, base);

      var _SampleEntry$parse2 = (0, _slicedToArray3.default)(_SampleEntry$parse, 2);

      readBytesNum = _SampleEntry$parse2[0];
      props = _SampleEntry$parse2[1];

      base += readBytesNum;

      base += 8; // skip reserved

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

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

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

      base += readBytesNum;

      var _Reader$readNumber3 = _Reader2.default.readNumber(buffer, base, 2);

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

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

      base += readBytesNum;

      base += 4; // skip reserved

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

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

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

      base += readBytesNum;

      props.channelCount = channelCount;
      props.sampleSize = sampleSize;
      props.sampleRate = sampleRate;

      return [base - offset, props];
    }
  }]);
  return AudioSampleEntry;
}(_SampleEntry3.default);

exports.default = AudioSampleEntry;