LibRaw technical support

Stable LibRaw versions: technical support, errors, API questions

Problems building libraw.dll

Submitted by jsachs on

In the absence of an updated libraw.dll in your recent releases on Github, I tried to recompile the sources to create it here. I was eventually able to set everything up and run nmake on Makefile.msvc and it appeared to run to completion, but the resulting libraw.dll is apparently 32-bit and not 64-bit as required. Your instructions do not explain how to modify Makefile.msvc to produce 64-bit dll and lib files.

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cam_xyz array differs from exiv2 output on Sony A7C

Submitted by trougnouf on

Hello all,

I found that the cam_xyz array returned by libraw doesn't match the one I got in exiv2 after going through Adobe DNG converter. I don't know which one is right. (The two match on my older D3300 camera).

I've uploaded a sample image on https://drive.google.com/drive/folders/1tBty_PqV_3LzDBytnj7d5dbH_C66Vu3d...

The cam_xyz array can be obtained from libraw as follow:

(in python)

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Kodak kodak_radc_load_raw function

Submitted by paulexchandler on

This function has a rather curious construct in it. There is a variable "int c" and there is:

         for (r=0; r <= !c; r++)

I believe many (most?) C compilers these days are going to result in an integer value of -1. So this for loop iterates once or zero times.

This is enclosed in a "FORC3" construct, which iterates c from 0 to 2.

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LibRaw on RPi

Submitted by mbrown on

Hello,

Can LibRaw be installed on a Raspberry Pi (running Raspbian or some other Linux flavor)? My apologies if this is a simple question - I had a look here (https://www.libraw.org/docs/Install-LibRaw-eng.html), but am a bit inexperienced with compiling and installing packages from source, and am not sure if the RPi hardware/OS is compatible (especially re. its processor architecture). Thank you!

Mike

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LIBRAW Thread Safety

Submitted by dsi on

Hi team,
I had a question about whether libraw can be used to read and process RAW files in a multithreaded application when using the single-threaded library version. I was not able to get a clear idea based on the API description page: https://www.libraw.org/docs/API-notes.html.

I plan to create a rawProcessor and read a file on a single thread. I plan to use multiple threads to read multiple files simultaneously.

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libraw.dll?

Submitted by jsachs on

I am currently using libraw.dll from the 0.20.02 release -- this has not been updated for a while, but I see you have been uploading new snapshots to the Git repository. Maybe I am missing something, but the snapshots do not seem to include libraw.dll in the bin folder or anywhere else. Any chance you could generate the DLL so I can add support for the newer cameras?

Thanks in advance,
Jonathan Sachs
Digital Light & Color

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Different behaviour between git and 0.20.2 with wide char

Submitted by lock on

Hello everyone,
I come with a small question. Indeed, I'm using libraw in my project and everything is fine. However I recently found a small glitch if I use the git version and not the 0.20.2 version.

To handle wide char filenames I use a function to convert them and it was ok until now. It looks like the git version has changed some behaviour.

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