I'm using 201903 snapshot and having issues with certain DNG files in the RAW converting code we're using.

1) One of them has strong yellow colour cast.

It turns out, one of the elements in the embedded colour matrix array is being overridden due to other array being accessed incorrectly in identify() function dcraw_common.cpp, line 20728:

I'm seeing some odd results when processing a DNG from a Pentax K5-II. Exiftool reports:

======== IMGP1593.DNG
Black Point                     : 513 513 515 516
Black Level                     : 513 513 515 516
Exposure Time                   : 1/8000
ISO                             : 800

Yet after calling LibRaw.unpack() I see

Hello,

I'm using LibRaw to process RAW files on Windows. I'm using the March Snapshot built with Visual Studio 2017, 64-bit,

I'm having problems with EXIF orientation in several RAW files, mostly Canon CR2 files.
When the user enables the option to use the embedded preview in the CR2, my software uses the routines

unpack_thumb
dcraw_make_mem_thumb

to create an in-memory image and then I load that image into my image library for further processing. After loading the image my code checks the

imgdata.sizes.flip

I build libraw as a static library, and set C++ Language features OpenMP=Yes for that project

Do I need to do anything more to get the openmp acceleration in libraw (e.g. does the application it is linked with also need to specify OpenMP=Yes?

I'm doing white balance scaling on the raw data I've retrieved based on the values in imgdata.color.pre_mul

Processing data from a Pentax K-5 I'm seeing the following in pre_mul after calling unpack():

White balance co-efficients being used are 2.155461, 0.926686, 1.305787, 0.000000

I'm slightly surprised to see that a) the second value isn't 1.0, and b) that the fourth value is zero.