zxwebcam

toy utility to grab frames from a v4l-supported webcam, decode any barcodes captured and send the results via HTTP to another service.

works decently on a RaspberryPi 3 at about 15fps and with the capture resolution set to 320x240.

uses msgpack to encode the POST payload. dev_server/ has an example python webapp that displays scan results and previews webcam output.

currently has a hardcoded 2 second backoff to prevent duplicate reads, see poster_thread.h/cxx.

run without any args to see cmdline opts.

compiling

# from the cloned source directory
git submodule update --init --recursive
mkdir build
cd build
cmake ..
cmake --build .

requirements

The following packages on debian

apt install cmake g++ build-essential libv4l-dev libjpeg-dev libcurl4-openssl-dev

libs

• zxing-cpp: https://github.com/nu-book/zxing-cpp/
• CImg: http://cimg.eu
• args: https://github.com/taywee/args
• spdlog: https://github.com/gabime/spdlog
• cpr: https://github.com/whoshuu/cpr
• msgpack-c: https://github.com/msgpack/msgpack-c