* craft-metadata: EXIF, IPTC-IIM, XMP and GPX from LightCraft
lightcraft-meta at 5b61ce1e, as one crate with a module per format: exif
(read, write, maker-note lens, focus point, tag listing), iptc, xmp (parse,
write, merge), gpx, and the JPEG, PNG, WebP, TIFF, RAF and CR3 containers.
They share Metadata, DateTime, Gps and Orientation.
Changed in the move:
- TIFF comes from craft-tiff; Point, Rect and Orientation are the crate's own.
- The app namespace is a parameter: parse_xmp_with, write_xmp_with and
MergeRules::namespaces take it, and XmpData no longer has lc_settings.
- The HEIF, PSD and MRW readers stay out, since craft-heif, craft-psd and
craft-raw read those containers; from_embedded takes the blocks they find.
* craft-metadata: a RW2 reads ISO and the rest of its Exif from the JpgFromRaw
A RW2's own Exif IFD is a short subset. What it lacks is filled from the Exif
of the embedded JpgFromRaw, then from the ISO tags of the Panasonic IFD0
(0x0017, 0x0037), each only in its recorded field type. 65535 in a SHORT
ISOSpeedRatings is the overflow marker and states no ISO. The private tags
are read only in a RW2 stream, under the caller's parse options.
Ported from storytold/lightcraft#3518.
* craft-metadata: the Exif rating is written, and 65535 reads as rejected
write_exif writes Rating (0x4746), with 0xFFFF for a rejected photo, and
from_tiff reads 65535 as -1 instead of clamping it to 5.
Ported from storytold/lightcraft#1995.
* craft-metadata: one shutter-speed formatter, exact to four digits
format_exposure_time shows a duration within 0.1% of 1/n second as 1/n and
anything else to four significant digits, so 0.3 s, 1/2.8 s and 0.625 s are
no longer rounded to a reciprocal or one decimal. Metadata::exposure_display
and the ExposureTime tag row both use it.
Ported from storytold/lightcraft#1692.
* craft-metadata: JPEG XL containers give their Exif and xml boxes
The first Exif and xml box of a JPEG XL container, plain or Brotli-wrapped
in brob, honouring the Exif box's TIFF header offset. A brob payload is
capped at 32 MiB. A bare codestream has no metadata.
Ported from storytold/lightcraft#3756.
* craft-metadata: XMP Resource structs flatten their attribute fields
A property with rdf:parseType="Resource" may give its fields as attributes
as well as child elements. Only the children were flattened into
XmpData::properties; the attributes now are too, as for a nested
rdf:Description.
Ported from storytold/lightcraft#1226 (the XMP part).
* craft-metadata: a capture date of just a year or a month stays as stated
XMP dates may stop at the year (1983) or the month (1983-04). DateTime now
has a DatePrecision; such a date writes back to XMP as stated and only in
photoshop:DateCreated, and write_exif leaves it out, since an Exif date
cannot say it.
Ported from storytold/lightcraft#3502.
* craft-metadata: the linear-time scan test compares times, not a fixed bound
The test asserted that 200 000 attributes scan in under 5 s, which failed on
a loaded machine. It now scans 25 000 and 100 000 attributes, takes the best
of three runs of each, and asserts that four times the attributes take less
than ten times as long. Linear scans give about 4; a quadratic duplicate
check gave 18.6 and fails.
* craft-metadata: interleave the linear-time scan test's runs
The best-of-three ratio still failed once under load. The test now alternates
five runs of 50 000 and 200 000 attributes and compares the fastest of each,
so a burst of load slows both sizes. Six runs at load average 55 gave ratios
of 3.9 to 5.4 against the bound of 10.
---------
Co-authored-by: radialmonster <radial@gmail.com>
Co-authored-by: Sebastian Berschneider <berschi@gmail.com>
Co-authored-by: FredApps <153173854+FredApps@users.noreply.github.com>
Co-authored-by: Michael Anderson <1427851+endthestart@users.noreply.github.com>
Co-authored-by: Ilya Dorman <ilya@codeforhumans.dev>
Co-authored-by: Clyde C Brown <clyde.c.brown@pm.me>
lightcraft-meta at 5b61ce1e, as one crate with a module per format: exif
(read, write, maker-note lens, focus point, tag listing), iptc, xmp (parse,
write, merge), gpx, and the JPEG, PNG, WebP, TIFF, RAF and CR3 containers.
They share Metadata, DateTime, Gps and Orientation.
Changed in the move:
- TIFF comes from craft-tiff; Point, Rect and Orientation are the crate's own.
- The app namespace is a parameter: parse_xmp_with, write_xmp_with and
MergeRules::namespaces take it, and XmpData no longer has lc_settings.
- The HEIF, PSD and MRW readers stay out, since craft-heif, craft-psd and
craft-raw read those containers; from_embedded takes the blocks they find.
