From 36a4f67a755ef54d81944ae6d8b11685e5a41a28 Mon Sep 17 00:00:00 2001 From: Stefan Klug Date: Tue, 25 Jun 2024 09:49:56 +0200 Subject: apps: common: dng_writer: Workaround for "Unknown tag 33421" error In libtiff version 4.5.1 and later the CFA* tags were missing. This got fixed in https://gitlab.com/libtiff/libtiff/-/commit/49856998c3d82e65444b47bb4fb11b7830a0c2be Unfortunately the fix is not released yet, but the faulty libtiff is contained in current buildroot. As a local fix is pretty easy and without side effects, let's workaround that. Signed-off-by: Stefan Klug Reviewed-by: Kieran Bingham Reviewed-by: Laurent Pinchart --- src/apps/common/dng_writer.cpp | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/src/apps/common/dng_writer.cpp b/src/apps/common/dng_writer.cpp index 58e35f3f..123f18a0 100644 --- a/src/apps/common/dng_writer.cpp +++ b/src/apps/common/dng_writer.cpp @@ -526,6 +526,23 @@ int DNGWriter::write(const char *filename, const Camera *camera, TIFFWriteDirectory(tif); + /* + * Workaround for a bug introduced in libtiff version 4.5.1 and no fix + * released. In these versions the CFA* tags were missing in the field + * info. + * Introduced by: https://gitlab.com/libtiff/libtiff/-/commit/738e04099b13192bb1f654e74e9b5829313f3161 + * Fixed by: https://gitlab.com/libtiff/libtiff/-/commit/49856998c3d82e65444b47bb4fb11b7830a0c2be + */ + if (!TIFFFindField(tif, TIFFTAG_CFAREPEATPATTERNDIM, TIFF_ANY)) { + static const TIFFFieldInfo infos[] = { + { TIFFTAG_CFAREPEATPATTERNDIM, 2, 2, TIFF_SHORT, FIELD_CUSTOM, + 1, 0, const_cast("CFARepeatPatternDim") }, + { TIFFTAG_CFAPATTERN, -1, -1, TIFF_BYTE, FIELD_CUSTOM, + 1, 1, const_cast("CFAPattern") }, + }; + TIFFMergeFieldInfo(tif, infos, 2); + } + /* Create a new IFD for the RAW image. */ const uint16_t cfaRepeatPatternDim[] = { 2, 2 }; const uint8_t cfaPlaneColor[] = { -- cgit v1.2.1