kontainer-js/core/Stream.js

A media file format generator/parser that exposes a React-like API.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.TransformStream = undefined;

var _assign = require('babel-runtime/core-js/object/assign');

var _assign2 = _interopRequireDefault(_assign);

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 _inherits2 = require('babel-runtime/helpers/inherits');

var _inherits3 = _interopRequireDefault(_inherits2);

var _Buffer = require('./Buffer');

var _Buffer2 = _interopRequireDefault(_Buffer);

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

var TransformStream = exports.TransformStream = void 0;

if (global && global.Buffer) {
  var Transform = require('stream').Transform;

  var NodeTransform = function (_Transform) {
    (0, _inherits3.default)(NodeTransform, _Transform);

    function NodeTransform(parser) {
      var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
      (0, _classCallCheck3.default)(this, NodeTransform);

      var _this = (0, _possibleConstructorReturn3.default)(this, (0, _getPrototypeOf2.default)(NodeTransform).call(this, options));

      _this.buffer = null;
      _this.offset = 0;
      _this.parser = parser;
      _this.options = options;
      return _this;
    }

    (0, _createClass3.default)(NodeTransform, [{
      key: '_transform',
      value: function _transform(chunk, encoding, done) {
        var _this2 = this;

        if (chunk instanceof global.Buffer) {
          if (this.buffer) {
            this.offset = this.buffer.length;
            this.buffer = global.Buffer.concat([this.buffer, chunk]);
          } else {
            this.buffer = chunk;
          }
          this.parser(new _Buffer2.default(this.buffer), this.offset, function (event, param) {
            if (event === 'done') {
              var b = void 0;
              if (param && param instanceof _Buffer2.default) {
                b = param.getData();
              } else {
                b = param;
              }
              done(null, b);
            } else {
              _this2.emit(event, param);
            }
          });
        }
      }
    }, {
      key: '_flush',
      value: function _flush(done) {
        done();
      }
    }, {
      key: 'setOptions',
      value: function setOptions(options) {
        (0, _assign2.default)(this.options, options);
      }
    }]);
    return NodeTransform;
  }(Transform);

  exports.TransformStream = TransformStream = NodeTransform;
} else {
  // TODO (WhatWG's streams)
}