LR-IMP-FORMATS: property tests for the CRX decoder through the public decode path

Browse Source

crates/raw/tests/crx_properties.rs drives lightcraft_raw::decode with
synthetic CR3 containers built around CRX streams that the test encodes
itself: reference entropy coders for the MED, Rice, MELCODE and QP-map
layouts, and the exact algebraic inverse of one 5/3 lifting line. The
tile-halo coefficients are free parameters of that inverse, so synthesis
must reconstruct any encoded plane exactly. Tests only; no decoder change.

- Wavelet round trip: random planes decode exactly across odd plane sizes
  and multi-tile halo configurations (eight geometries, arbitrary halo
  values).
- Quantization: every uniform quant value 4..=44 and every adaptive QP value
  131..=168 dequantizes within the 14-bit range. Overshoot is clamped, and
  an in-range plane lands exactly on level * step, so the step sequence
  itself is observable. Quant 3 and 45 and QP 130 and 169 are rejected by
  decode and probe_info alike. Random QP maps, including odd map heights,
  with random per-band base and gain stay in range.
- Lossless samples outside the bit depth are Corrupt errors instead of being
  clamped; in-range planes decode exactly.
- Adversarial entropy payloads planted in well-formed lossless, C-RAW,
  version 0x200 and QP-map streams either error or decode deterministically
  and never panic. A QP Rice prefix longer than the 23-zero escape is
  Corrupt.
- Random IAD1 geometry either decodes with the active area inside the
  sensor and the crop inside the active area, or is rejected.
- Decoding gives identical results across repeated and four-way parallel
  invocations.
- Odd QP-map heights decode: the last QP row has no partner and is used
  alone, and QP values are averaged before the step lookup. Large QP jumps
  take the escape code.

The case budget is proptest's default (256 per property); set
PROPTEST_CASES to change it.

...

This commit is contained in:

eliets2

2026-10-13 10:40:45 +03:00

parent b3d392b499

commit f4b7175429

1 changed files with 1048 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download Patch File Download Diff File Expand all files Collapse all files

crates/raw/tests/crx_properties.rs

+1048

File diff suppressed because it is too large Load Diff