Xvodecompk

xvodecompk is a novel hybrid kernel that first decompresses LZ77-like data, then performs an LDU decomposition. While not a standard algorithm, it is efficient for embedded signal processing. This study provides the first public documentation and opens avenues for forensic analysis of undocumented embedded routines.

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xvodecompk is an open‑source C/C++ library that implements the XVO (eXtreme Variable‑Order) loss‑less compression format. The format was originally designed for high‑frequency, time‑series data where both compression ratio and decompression speed are critical. The library provides:

The project lives on GitHub under an MIT license, with continuous integration for Linux, macOS, and Windows.

xvodecompk is available today under the Apache 2.0 license. Developers can access the core library and documentation via our official repository. xvodecompk is a novel hybrid kernel that first

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Product Review – xvodecompk (v1.3.2)
Cross‑platform library for fast lossless decompression of XVO‑encoded data

| Test Data (size) | Compression Ratio | Decompression Speed (single‑thread) | CPU Utilisation | |------------------|-------------------|-------------------------------------|-----------------| | 250 MB telemetry log (random walk) | 3.8 : 1 | 2.3 GB/s (≈ 9 GB/s on AVX‑512) | ~85 % (single core) | | 1.2 GB high‑resolution image tiles | 5.2 : 1 | 1.7 GB/s (≈ 6 GB/s AVX‑512) | ~70 % | | 3 GB binary sensor dump (low entropy) | 1.9 : 1 | 3.1 GB/s (≈ 12 GB/s AVX‑512) | ~92 % |

Key takeaways:

/* Minimal example */
#include <xvodecompk.h>
int main(void) 
    const uint8_t *comp;    // compressed buffer
    size_t comp_len;
    uint8_t *out;           // pre‑allocated output buffer
    size_t out_len;
// Assume comp/comp_len/out/out_len are set appropriately
    int rc = xvo_decompress(comp, comp_len, out, out_len);
    if (rc != XVO_OK) 
        fprintf(stderr, "Decompression failed: %s\n", xvo_strerror(rc));
        return 1;
/* … use out … */
    return 0;

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Overall, a developer familiar with zlib or LZ4 will feel at home within 15 minutes of reading the header file.