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FredApps
10db03b091
* LR-IMP-FORMATS: withdraw compressed ORF decoding Remove the decoder introduced in #3775 pending provenance review while preserving uncompressed ORF layouts and embedded previews. Add unsupported probe/decode regressions, remove the prior provenance narrative, and restore camera coverage records to preview-only. * LR-IMP-FORMATS: refresh ORF support status and render caches * LR-IMP-FORMATS: document ORF withdrawal regressions
12 lines
1.6 KiB
Markdown
12 lines
1.6 KiB
Markdown
# Olympus compressed ORF: support withdrawn
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Compressed ORF sensor decoding introduced in #3775 has been removed while its provenance remains unresolved. The earlier clean-room and derivation claims are withdrawn; this note makes no legal determination and is not a format specification.
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Compressed ORF files are unsupported for sensor decoding. They use an embedded JPEG preview when one is available; a file without a usable preview cannot be rendered. Preview-only editing and export operate on that rendered preview, not the raw sensor data.
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Uncompressed 16-bit, packed 12-bit, two-field 12-bit and 12.8 bpp ORF support remains in `crates/raw/src/vendor/orf.rs`. This includes supported uncompressed high-resolution modes; it does not imply compressed-mode support on the same camera.
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Existing ORF records are rechecked in the background when a library opens, including files previously marked as sensor-decodable. Supported uncompressed ORFs remain supported; compressed files become preview-only. Missing or offline files are left unchanged and retried on the next open. **Reload from Disk** (`photo.reload`) can also refresh this status manually. ORF render-cache identities invalidate older sensor-derived thumbnails and loupe renders. Existing edits may look different when applied to the camera JPEG instead of sensor data.
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Coverage records no longer count the removed decoder as support or verification. See [raw-parity.md](raw-parity.md) and [raw/coverage.tsv](raw/coverage.tsv). Any future compressed ORF decoder requires independently established provenance and validation before support is claimed again. Git history is preserved.
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