rawspeed OBS

#RawSpeed Developer Information

##What is RawSpeed?

RawSpeed…

• is capable of decoding various images in RAW file format.
• is intended to provide the fastest decoding speed possible.
• supports the most common DSLR and similar class brands.
• supplies unmodified RAW data, optionally scaled to 16 bit, or normalized to 0->1 float point data.
• supplies CFA layout for all known cameras.
• provides automatic black level calculation for cameras having such information.
• optionally crops off “junk” areas of images, containing no valid image information.
• can add support for new cameras by adding definitions to an xml file.
• is extensively crash-tested on broken files.
• decodes images from memory, not a file stream. You can use a memory mapped file, but it is rarely faster.
• is currently tested on unique cameras, on unique samples. Please contribute samples!
• open source under the LGPL v2 license.

RawSpeed does NOT…

• read metadata information, beside whitebalance information.
• do any color correction or whitebalance correction.
• de-mosaic the image.
• supply a viewable image or thumbnail.
• crop the image to the same sizes as manufactures, but supplies biggest possible images.

So RawSpeed is not intended to be a complete RAW file display library, but only act as the first stage decoding, delivering the RAW data to your application.

##Version 2, new cameras and features

• Support for Sigma foveon cameras.
• Support for Fuji cameras.
• Support old Minolta, Panasonic, Sony cameras (contributed by Pedro Côrte-Real)
• Arbitrary CFA definition sizes.
• Use pugixml for xml parsing to avoid depending on libxml.

##Getting Source Code

You can get access to the lastest version using from here. You will need to include the “RawSpeed” and “data” folder in your own project.

CMake-based build system is provided.

##Background of RawSpeed

The main objectives were to make a very fast loader that worked for 75% of the cameras out there, and was able to decode a RAW file at close to the optimal speed. The last 25% of the cameras out there could be serviced by a more generic loader, or convert their images to DNG – which as a sidenote usually compresses better than your camera.

RawSpeed is not at the moment a separate library, so you have to include it in your project directly.

##Please see /src/librawspeed/README.md for usage instructions.

##Submitting Requests and Patches

Please go to the github page and submit your (pull)requests and issues there.