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authorStefan Klug <stefan.klug@ideasonboard.com>2024-06-25 09:49:56 +0200
committerStefan Klug <stefan.klug@ideasonboard.com>2024-06-26 15:48:34 +0200
commit36a4f67a755ef54d81944ae6d8b11685e5a41a28 (patch)
tree3d28d514466afa352e285b04833f6925c8cb6754 /src
parentfc3efe072357a30599add61506ee2613f227bf5c (diff)
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 <stefan.klug@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src')
-rw-r--r--src/apps/common/dng_writer.cpp17
1 files changed, 17 insertions, 0 deletions
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<char *>("CFARepeatPatternDim") },
+ { TIFFTAG_CFAPATTERN, -1, -1, TIFF_BYTE, FIELD_CUSTOM,
+ 1, 1, const_cast<char *>("CFAPattern") },
+ };
+ TIFFMergeFieldInfo(tif, infos, 2);
+ }
+
/* Create a new IFD for the RAW image. */
const uint16_t cfaRepeatPatternDim[] = { 2, 2 };
const uint8_t cfaPlaneColor[] = {