The compressed RW2 layouts of earlier Lumix bodies (e.g. the DMC-GX7)
decode at full sensor resolution instead of falling back to the camera's
embedded JPEG preview. The layout was established by observation of
sample files (fixed 16 bytes per 14 pixels, predictor groups with
per-parity predictors, page-permuted downward bit order); the black
level of these files reads 15 counts low.
Adds round-trip tests through a mirrored synthetic encoder, cursor and
predictor-group unit vectors, and updates the support matrix.
Co-authored-by: Gotya-OFFCIAL <339410022+Gotya-OFFCIAL@users.noreply.github.com>
Sony cRAW files with no BlackLevel tag take the 512 their tone curve gives the black
code instead of 0 (the ILCE-7 no longer develops washed out; the RX0 corpus oracle moves
to 512 too). cameras.rs gains measured image areas without a full profile: the Nikon
D800E and Sony ILCE-7 crop like the camera's JPEG.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The "is this the undecoded compressed/packed ORF" guard summed the strip
byte counts and compared the sum with width × height × 2. Tiff::tag_uints
returns an empty list when the entry is missing or unreadable, so a file
whose IFD0 entry table is truncated (a partial download, a damaged card)
summed to zero and was reported as "Olympus compressed (or packed) ORF is
not decoded" — a format the user's camera does not produce — while the same
file cut a few bytes earlier or later was correctly reported as malformed.
Missing or unreadable strip byte counts are now RawError::Malformed before
the compression check. Regression test: a synthetic uncompressed ORF cut
right before its StripByteCounts entry is Malformed, and no prefix of the
file reads as the compressed variant.
Co-authored-by: wstock <1394687+wstock@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
* raw: decode Sony cRAW, Panasonic RW2 (RawFormat 5) and uncompressed Olympus ORF
- sony.rs: compressed ARW (SonyRawFileType 2): 32-pixel runs as two
16-byte blocks of 11-bit max/min, 4-bit positions and 7-bit deltas,
then the SonyToneCurve (0x7010) to 14 bits. From Dietz (EI 2016) and
the RawDigger write-up; bit order and curve scale by observation.
- rw2.rs: RawFormat 5 12/14-bit packing (10/9 pixels per 16-byte LE
block), stored in 0x4000-byte pages split at 0x1FF8 (observed), with
PanasonicRaw CFA, black, linearity limit, WB and sensor borders.
RawFormat 4 and older stay unsupported (preview fallback).
- orf.rs: uncompressed 16-bit ORF (E-1, E-400): left-justified
samples, EXIF CFAPattern, Olympus ImageProcessing black / WB /
ValidBits / crop; compressed ORF stays unsupported but its maker-note
preview (CameraSettings 0x0101/0x0102) is now found.
- testgen: cRAW, RW2 and ORF encoders/builders; vendor_codecs tests
round-trip each codec; hostile tests fuzz/truncate all three.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* raw: README support matrix for cRAW, RW2, ORF and the clean-room gaps
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
