leonarski_fandClaude Opus 5
259b43154e
Two ways the written files could misdescribe themselves without anyone noticing. The pixel format is stated twice and the two were never compared: each image carries its own type as a CBOR tag, which is what the data files are written with, while the master is typed from the start message. A stream whose header contradicts its images produced data files of one type under a master declaring another, and with NXmxVDS, HDF5 then converts silently on every read. HDF5DataFile::CreateFile now checks the two agree and refuses the run otherwise - the point where the values first meet, so it covers every path into the writer. Two test fixtures were relying on exactly that inconsistency. The HDF5 writer tests wrote uint16 buffers under a JUNGFRAU experiment, which converts to photon counts by default and so declares int16; they never read the pixels back, so it went unnoticed. The receiver-lite tests feed frames from compression_benchmark.h5, which really are signed int16, through a DECTRIS experiment, which declares unsigned by default - the same class of bug the pixel_signed propagation fixed on the live path. Both now declare what they send. Second: a virtual dataset whose source file is absent reads as the fill value, and HDF5 defaults that to zero, so a data file that was not copied alongside the master is indistinguishable from frames of genuine zero counts. Measured with DIALS on a four-file set with one file removed: 25 frames of pure zeros, no error and no warning. The image VDS is now filled with the error marker instead, which sits outside underload_value..saturation_value, so a reader masks those frames. Same measurement after the change: -32768 throughout, which DIALS excludes. Only the images ask for a fill value; the per-image metadata datasets keep the default. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Jungfraujoch
Application to receive data from the PSI JUNGFRAU and EIGER detectors.
All documentation is now placed in docs/ subdirectory and for the current version hosted on Jungfraujoch Read The Docs page.