Unpacks count components of a row stored at 1, 2, 4 or 8 bits into one byte each, as raw values.
public static void Unpack(ReadOnlySpan<byte> row, int storageBits, int count, Span<byte> destination)
The row, from its first byte.
The storage width: 1, 2, 4 or 8 (StorageBits).
The number of components to unpack: width × components.
At least count bytes.
ISO 32000-2 §8.9.3: most significant bit first.