Function renderFunction

wasm/browser/src/workers/common.utils.js:58–78

({ libraryCsound, workerMessagePort, wasi })

export const renderFunction =
  ({ libraryCsound, workerMessagePort, wasi }) =>
  async ({ csound }) => {
    const kr = libraryCsound.csoundGetKr(csound);
    let lastResult = 0;
    let cnt = 0;

    while (
      (workerMessagePort.vanillaWorkerState === "renderStarted" ||
        workerMessagePort.workerState === "renderStarted") &&
      lastResult === 0
    ) {
      lastResult = libraryCsound.csoundPerformKsmps(csound);
      cnt += 1;

      if (typeof setTimeout === "function" && lastResult === 0 && cnt % kr === 0) {
        // this is immediately executed, but allows events to be picked up
        await new Promise((resolve) => setTimeout(resolve, 0));
      }
    }
    workerMessagePort.broadcastPlayState("renderEnded");
  };