MQX-Decoder/ExtractAllMeasurements_mqx.html at main · ObsessiveCompulsiveAudiophile/MQX-Decoder · GitHub

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<!DOCTYPE html>
<html>
<head>
  <style>
    button {
      padding: 10px 20px;
      font-size: 16px;
      background-color: yellowgreen;
      color: darkred;
      border: thin;
      cursor: pointer;
      border-radius: 4px;
    }
    button:hover {
      background-color: #45a049;
    }
  </style>
</head>
<body>
  <h2>MultEQ-X measurement extractor by OCA</h2>
  <br>
  <label for="input">Select .mqx file to upload:</label>
  <input type="file" id="input" accept=".mqx">
  <br>
  <p style="font-size: small; color: red;">Remember to upload ACM1HB standard mic calibration file (included in the ZIP) to REW before importing measurements for more accurate responses!</p>
  <br>
  <br>
  <button onclick="decodeAndConvert()">
    Decode, convert and save<br>measurements for REW
  </button>
  <p id="message" style="display: none;">Please wait, working on the zip...</p>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/2.0.0/FileSaver.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/jszip/3.6.0/jszip.min.js"></script>
  <script>
    async function decodeAndConvert() {
      const button = document.querySelector('button');
      button.disabled = true; // Disable the button
      const message = document.getElementById('message');
      message.style.display = 'block'; // Show the message
      const input = document.getElementById('input');
      const file = input.files[0];
      const text = await file.text();
      const jsonData = JSON.parse(text);
      const channelMap = {};
      const channelDataMap = jsonData._channelDataMap;
      for (const channelGuid in channelDataMap) {
        const metadata = channelDataMap[channelGuid].Metadata;
        channelMap[channelGuid] = metadata.AvrOriginatingDesignation;
      }
      const zip = new JSZip();
      const measurements = jsonData._measurements;
      const trimPositionGuids = jsonData.CalibrationSettings.TrimPositionGuids;
      const distancePoisitionGuid = jsonData.CalibrationSettings.DistancePoisitionGuid;
      measurements.forEach((measurement, index) => {
        const base64String = measurement.Data;
        const bytesArray = new Uint8Array(atob(base64String).split('').map(c => c.charCodeAt(0)));
        const floats = [];
        for (let i = 0; i < bytesArray.length; i += 4) {
          floats.push(readFloat(bytesArray, i));
        }
        const channelGuid = measurement.ChannelGuid;
        const positionGuid = measurement.PositionGuid;
        const avrOriginatingDesignation = channelMap[channelGuid];
        const positionIndex = trimPositionGuids.indexOf(positionGuid);
const isDistancePosition = positionGuid === distancePoisitionGuid;
let filename;
  if (positionIndex === -1) {
    const shortenedGuid = positionGuid.substring(0, 3);
    filename = isDistancePosition
      ? `${avrOriginatingDesignation}_${shortenedGuid}_dp.txt`
      : `${avrOriginatingDesignation}_${shortenedGuid}.txt`;
  } else {
    filename = isDistancePosition
      ? `${avrOriginatingDesignation}_${positionIndex}_dp.txt`
      : `${avrOriginatingDesignation}_${positionIndex}.txt`;
  }
        const txtContent = `* Impulse Response data saved by REW
0 // Peak value before normalisation
0 // Peak index
16384 // Response length
2.0833333333333333E-5 // Sample interval (seconds)
0.0 // Start time (seconds)
* Data start
${floats.join('\n')}`;
        zip.file(filename, txtContent);
      });
      const zipBlob = await zip.generateAsync({ type: 'blob' });
      saveAs(zipBlob, 'REW_Measurements.zip');
      message.style.display = 'none'; // Hide the message
      button.disabled = false; // Enable the button
    }
    function readFloat(bytesArray, start) {
  const dv = new DataView(bytesArray.buffer);
  const intBits = dv.getUint32(start, true);
  const signBit = (intBits >> 31) & 0x1;
  const exponent = (intBits >> 23) & 0xFF;
  const mantissa = intBits & 0x7FFFFF;
  if (exponent === 0xFF) {
    if (mantissa === 0) {
      return signBit ? Number.NEGATIVE_INFINITY : Number.POSITIVE_INFINITY;
    } else {
      return NaN;
    }
  }
  const bias = 127;
  const normalizedMantissa = 1 + mantissa / Math.pow(2, 23);
  const value = Math.pow(-1, signBit) * normalizedMantissa * Math.pow(2, exponent - bias);
  return value;
}
  </script>
</body>
</html>