RawParser

Overview

RawParser is a GO library for extracting: the embedded JPEGs from a camera RAW file and metadata. It's current incarnation parses TIFF-based RAW files. There are existing tools that perform this or similar functionality; however, the reasons for creating this tool:

1. I have many RAW files that are processed using commercial software, yet on occassion, I would like the camera-produced JPEG for comparison.
2. To utilize the concurrency model provided by the GO language to process multiple files without any explicit "traditional" locking (e.g, mutexes)
3. Experiment with GO's "C" package and interfacing with existing C libraries.

My jpegextract utility utilizes this library and may serve as a usage example.

Dependencies

• GO 1.2 (maybe older GO 1.1.2? but not tested)
• Optional (highly-recommended):
  • C++ JPEG Compressor/Decompressor. The source is included in this project. Only a c/c++ compiler is needed, no other libraries.
  • libjpeg
  • TurboJpeg
  • If you have many JPEGs to extract, TurboJpeg provides noticebly better performance.

Usage

• Obtain the library:

go get github.com/jeremytorres/rawparser

• Execute the tests

cd $GOPATH/src/github.com/jeremytorres/rawparser

Test with GO's image/jpeg library:

go test

Test with libjpeg library:

go test -tags jpeg

Test with turbojpeg library:

go test -tags turbojpeg

Test with standalone c++ library:

go test -tags jpegcpp

Current Development Status

• I consider the current status a beta version as there is a laundry list of this I will like to support:
  • Add performance benchmarks
  • Add additional camera RAW file support
  • Create a "better" parser interface