a2350dd0f6
Vendor codec 2.65.0 (from vaptvupt-codec tag v2.65.0), re-applying the two
in-tree audit patches on top: the ANS decode safe-zone 2*SAFEZONE_MAX_RUN
reserve (heap-overflow guard, not yet upstream) and the AVX2 offset-read
bound in vv_decoder.c.
Two settings in the integration layer were leaving most of the codec's ratio
on the table:
* vaptvupt_api.c forced opts.format_v2=1 for balanced+extreme. Since codec
v2.61.0 that routes text through the binary/greedy path and HALVES the
extreme-mode text ratio (codec-level 7.6x -> 3.7x). The codec auto-enables
format_v2 for binary-detected input on its own, so stop forcing it: text
keeps the optimal parser, binary still gets v2.
* auto_block_size() capped the extreme block at 512 KiB. The block IS the
codec's LZ window, so the 'large-window extreme' parser could never match
past 512 KiB. Scale block size with level (128 KiB fast -> 8 MiB extreme).
Because block size also sets --dedup granularity (a large block rarely
finds a byte-exact duplicate), --dedup now overrides to a small 256 KiB
block so block-level dedup still works.
Measured, level 9 extreme: text 3.77x->5.98x (+58%), logs 7.21x->9.07x (+26%),
json 8.25x->9.38x, source 4.93x->5.63x. Wire format unchanged (v1.6); 5.0.0
and 5.1.0 archives interoperate both directions (verified, all modes). Bump
ZUPT_CODEC_RELEASE to 2.65.0 and ZUPT_VERSION_STRING to 5.1.0.
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/*
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* VaptVupt — VaptVupt Integration API
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* SPDX-License-Identifier: GPL-3.0-or-later
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* Copyright 2026 Cristian.
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*
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* EMBED-COMPAT: This is the API that a host application calls. It wraps the internal
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* VaptVupt API with sensible defaults for backup workloads:
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* - Checksum always enabled (data integrity is critical for backups)
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* - Adaptive window selection (auto-detect optimal wlog per file)
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* - Level maps to mode: 1=fast, 5=balanced, 9=extreme
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*
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* Usage:
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* size_t bound = vvz_compress_bound(src_len);
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* uint8_t *dst = malloc(bound);
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* int64_t csz = vvz_compress(src, src_len, dst, bound, 5);
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* int64_t dsz = vvz_decompress(dst, csz, out, out_cap);
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*/
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#ifndef VAPTVUPT_API_H
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#define VAPTVUPT_API_H
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#include <stdint.h>
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Compress src into dst. Returns compressed size or negative error code.
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* level: 1 = fast (max speed), 5 = balanced (default), 9 = extreme (max ratio) */
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int64_t vvz_compress(const uint8_t *src, size_t src_len,
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uint8_t *dst, size_t dst_cap, int level);
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/* Decompress src into dst. Returns decompressed size or negative error code. */
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int64_t vvz_decompress(const uint8_t *src, size_t src_len,
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uint8_t *dst, size_t dst_cap);
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/* Upper bound on compressed size for a given input length. */
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size_t vvz_compress_bound(size_t src_len);
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#ifdef __cplusplus
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}
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#endif
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#endif /* VAPTVUPT_API_H */
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