@doc.e.dub/csound-browser/src/workers/common.utils.js

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import { logCommonUtils as log } from "@root/logger";

export const handleCsoundStart = (
  workerMessagePort,
  libraryCsound,
  createRealtimeAudioThread,
  renderFunction,
) => (_, arguments_) => {
  const { csound } = arguments_;

  // If no orchestra was given, we assume realtime daemon mode
  // otherwise we'll end up rendering forever within the while loop
  const shouldDemonize = libraryCsound.csoundShouldDaemonize(csound) === 1;

  if (shouldDemonize) {
    libraryCsound.csoundSetOption(csound, "--daemon");
    libraryCsound.csoundSetOption(csound, "-odac");
  }
  const startError = libraryCsound.csoundStart(csound);

  const outputName = libraryCsound.csoundGetOutputName(csound) || "test.wav";
  log(`handleCsoundStart: actual csoundStart result ${startError}, outputName: ${outputName}`)();
  if (startError !== 0) {
    workerMessagePort.post(
      `error: csoundStart failed while trying to render ${outputName},` +
        " look out for errors in options and syntax",
    );
  }

  setTimeout(() => {
    const isRequestingRtMidiInput = libraryCsound._isRequestingRtMidiInput(csound);
    const isExpectingRealtimeOutput =
      shouldDemonize || isRequestingRtMidiInput || outputName.includes("dac");

    if (isExpectingRealtimeOutput) {
      createRealtimeAudioThread(arguments_);
    } else {
      // Do rendering
      workerMessagePort.broadcastPlayState("renderStarted");
      if (renderFunction) {
        renderFunction(arguments_);
      } else {
        // eslint-disable-next-line no-empty
        while (libraryCsound.csoundPerformKsmps(csound) === 0) {}
      }
    }
  }, 0);

  return startError;
};

export const instantiateAudioPacket = (numberChannels, numberFrames) => {
  const channels = [];
  for (let chn = 0; chn < numberChannels; chn++) {
    channels.push(new Float64Array(numberFrames));
  }
  return channels;
};