ZSTD decompression

[RaphaelChia]

Is it possible to support ZSTD decompression apart from GZIP compressed .spz file?
or the simplest is to open up the decompression byte offset for people that decompresses on their side before passing it to be viewed! thanks alot

[RaphaelChia]

without introducing new libraries, and to support the flexibility of different compression methods other than GZIP, this is what i've done locally in order to keep using your amazing library!

async function loadSpzPacked(compressedData) {
  try {
    // Check gzip or zstd
    const isGzipped =
      compressedData.length >= 2 &&
      compressedData[0] === 0x1f &&
      compressedData[1] === 0x8b;
    const isZstd =
      compressedData.length >= 4 &&
      compressedData[0] === 0x28 &&
      compressedData[1] === 0xb5 &&
      compressedData[2] === 0x2f &&
      compressedData[3] === 0xfd;
    if (isGzipped) {
      const decompressed = await decompressGzipped(compressedData);
      return deserializePackedGaussians(
        decompressed.buffer,
        decompressed.byteOffset
      );
    } else {
      return deserializePackedGaussians(
        compressedData.buffer,
        compressedData.byteOffset
      );
    }
  } catch (error) {
    console.error("[SPZ ERROR] loadSpzPacked: decompression error", error);
    return null;
  }
}

and

function deserializePackedGaussians(buffer, bufferOffset) {
  const view = new DataView(buffer);
  let offset = bufferOffset;
  // Read and validate header
  const header = {
    magic: view.getUint32(offset, true),
    version: view.getUint32(offset + 4, true),
...

[RaphaelChia]

Basically i replaced the 0 into a dynamically passed variable, because zstd decompression happen on my client which ends up in 12 byte offset. Figured might as well just pass it in the offset to make it work for anybody who wants to decompress any special compression methods on their side before passing it to your library to display