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Stream V2 Examples

C

stream2.c and stream2.h implement a stream V2 parser using tinycbor. example.c uses this parser to dump received messages to stdout. dectris-compression is used to decompress image channel data.

The code requires compiler support for half-float conversions. Any C compiler supporting C11 extension ISO/IEC TS 18661-3 will work. Otherwise, x86-64 intrinsics for SSE2 and F16C are required. If the code does not work with your compiler, please let us know.

Building

To get started, make sure that the submodules are initialized recursively:

git submodule update --init --recursive

Building the examples requires libzmq. By default, CMake will try to locate and use an installed version of libzmq. To download and build libzmq from source, set the CMake variable BUILD_LIBZMQ to YES.

Let documentation/ be the location where this repository is cloned recursively. Build and run the example with:

mkdir examples_build
cd examples_build
cmake ../documentation/stream_v2/examples -DCMAKE_BUILD_TYPE=Debug -DBUILD_LIBZMQ=YES
cmake --build .
./example

Python

client.py demonstrates how to receive and decode stream V2 data using Python 3. Fields of type MultiDimArray and TypedArray are represented as numpy arrays.

pip install cbor2 dectris-compression~=0.3.0 numpy pyzmq
python client.py