libcimbar/WASM.md

Demo encoder

cimbar.org

Releases

wasm and asm.js releases are available here. The wasm build is what cimbar.org uses. cimbar_js.html can be downloaded and opened/run in a local web browser -- no install required.

Build

To build, use the package-wasm.sh script in a docker container:

docker run --mount type=bind,source="$(pwd)",target="/usr/src/app" -it emscripten/emsdk:3.1.39

Then, inside the container:

bash /usr/src/app/package-wasm.sh

Alternative build for the adventurous

Alternatively, if you have a local emscripten setup, you can try to run the package-wasm.sh commands piecemeal:

To build opencv.js:

cd /path/to/opencv
mkdir opencv-build-wasm
cd opencv-build-wasm
python3 ../platforms/js/build_js.py build_wasm --build_wasm --emscripten_dir=/path/to/emscripten

With opencv.js built:

mkdir build-wasm
cd build-wasm
source /path/to/emscripten/emsdk/emsdk_env.sh
emcmake cmake .. -DUSE_WASM=1 -DOPENCV_DIR=/path/to/opencv
make -j5 install

(do -DUSE_WASM=2 to use asm.js instead of wasm)

What about a WASM cimbar decoder?

Some day!