This repository contains QPipewireHandler, a class that listens for items being added to or removed from the PipeWire graph. This repository also contains a demo application that logs those events to a QTextEdit.

The repository example is built using Qt 5 and builds with CMake.

Add QPipewireHandler.{cpp,h} to your project, as well as the CMake rules to search for PipeWire. The handler does not block the GUI thread, so it does not need to be boxed into a QThread.

When an item is added to the graph, the handler creates a new struct containing the item's properties and fires a Qt signal. The handler does not use the struct after firing the signal. The caller must free the struct.

Each PWItem contains a QHash<QString, QString> props containing the same info as the props section of an object if viewed by pw-dump.

The caller is responsible for maintaining a graph based on the items provided by the handler.

The handler does not provide a means for sending events back to PipeWire, or for listening to other kinds of events.`

I'm planning to use this to build tools to do PipeWire automation.