Ratatoskr subscribes to a CultMesh media stream and hands frames to a renderer.
First lowering target is OBS.
It exists because the receiver it replaces hand-rolled CultNet RUDP in C++
inside Mimir: acknowledgement, fragment reassembly, sockets, cultmesh:// URL
parsing, wire framing and two erasure codes, in 973 lines of headers linking no
CultLib. That made the receiving end of a protocol a separate implementation
from the sending end, in another language and another repository, and every
CultNet fix from August and September reached cultnet-rs and cultnet-ts without
reaching it.
So the constraint this repo holds is that it implements no transport. It
consumes CultNet. A sequence number or an ACK mask appearing here means
something belongs upstream in CultLib instead, where both ends can share it.
What works: the core opens a subscription over cultnet-rs, drains it, and hands
payloads across a C ABI. Nine Rust tests and fourteen C checks, the latter
loading the cdylib and verifying the header tells the truth rather than assuming
it. The MSVC staticlib is what the plugin will link; the C smoke test loads the
cdylib dynamically so the ABI is checkable with any compiler.
What does not: no reassembly, no FEC, no receiver feedback, and no plugin. It
cannot decode a real Muninn stream yet, because the wire envelope
(MuninnMediaWireRecord, encode_media_wire_record) still lives in Muninn and
needs to move to CultLib where both ends can reach it. README says so plainly
rather than implying more than exists.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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