Function StreamHelper

lib/stream/StreamHelper.js:116–144

* An helper to easily use workers outside of JSZip. * @constructor * @param {Worker} worker the worker to wrap * @param {String} outputType the type of data expected by the use * @param {String} mimeType the mime type of the content, if applicable.

(worker, outputType, mimeType)

 * @param {String} mimeType the mime type of the content, if applicable.
 */
function StreamHelper(worker, outputType, mimeType) {
    var internalType = outputType;
    switch(outputType) {
    case "blob":
    case "arraybuffer":
        internalType = "uint8array";
        break;
    case "base64":
        internalType = "string";
        break;
    }

    try {
        // the type used internally
        this._internalType = internalType;
        // the type used to output results
        this._outputType = outputType;
        // the mime type
        this._mimeType = mimeType;
        utils.checkSupport(internalType);
        this._worker = worker.pipe(new ConvertWorker(internalType));
        // the last workers can be rewired without issues but we need to
        // prevent any updates on previous workers.
        worker.lock();
    } catch(e) {
        this._worker = new GenericWorker("error");
        this._worker.error(e);
    }
}

StreamHelper.prototype = {
    /**