mikael-lovqvists-claude-agent/video-setup
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Add discovery module: UDP multicast announcements and peer tracking

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Sends 6-byte framed announcements to 224.0.0.251:5353 on startup and
every interval_ms (default 5s). Receive thread maintains a peer table
(max 64 entries); fires on_peer_found for new peers, on_peer_lost when
a peer misses timeout_intervals (default 3) consecutive intervals.

Own announcements are filtered by name+site_id. SO_REUSEADDR+REUSEPORT
allows multiple processes on the same host for testing.

discovery_cli: announce <name> <tcp_port> [flags] — prints found/lost events.

Also notes future config module in planning.md.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
mikael-lovqvists-claude-agent
2026-03-26 22:19:56 +00:00
parent 744e374531
commit fe350e531e
6 changed files with 527 additions and 17 deletions
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20
planning.md
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@@ -46,16 +46,18 @@ Modules are listed in intended build order. Each depends only on modules above i
| 2 | `media_ctrl` | done | Media Controller API — device and topology enumeration, pad format config |
| 3 | `v4l2_ctrl` | done | V4L2 controls — enumerate, get, set camera parameters |
| 4 | `serial` | done | `put`/`get` primitives for little-endian binary serialization into byte buffers |
| 5 | `transport` | not started | Encapsulated transport — frame header, TCP stream abstraction, single-write send |
| 6 | `protocol` | not started | Typed `write_*`/`read_*` functions for all message types; builds on serial + transport |
| 7 | `frame_alloc` | not started | Per-frame allocation with bookkeeping (byte budget, ref counting) |
| 8 | `relay` | not started | Input dispatch to output queues (low-latency and completeness modes) |
| 9 | `ingest` | not started | V4L2 capture loop — dequeue buffers, emit one encapsulated frame per buffer |
| 10 | `archive` | not started | Write frames to disk, control messages to binary log |
| 11 | `codec` | not started | Per-frame encode/decode — MJPEG (libjpeg-turbo), QOI, ZSTD-raw, VA-API H.264 intra; used by screen grab source and archive |
| 12 | `xorg` | not started | X11 screen geometry queries (XRandR), screen grab source (calls codec), frame viewer sink — see architecture.md |
| 13 | `web node` | not started | Node.js/Express peer — speaks binary protocol on socket side, HTTP/WebSocket to browser; `protocol.mjs` mirrors C protocol module |
| 5 | `transport` | done | Encapsulated transport — frame header, TCP stream abstraction, single-write send |
| 6 | `discovery` | done | UDP multicast announcements, peer table, found/lost callbacks |
| 8 | `protocol` | not started | Typed `write_*`/`read_*` functions for all message types; builds on serial + transport |
| 9 | `frame_alloc` | not started | Per-frame allocation with bookkeeping (byte budget, ref counting) |
| 10 | `relay` | not started | Input dispatch to output queues (low-latency and completeness modes) |
| 11 | `ingest` | not started | V4L2 capture loop — dequeue buffers, emit one encapsulated frame per buffer |
| 12 | `archive` | not started | Write frames to disk, control messages to binary log |
| 13 | `codec` | not started | Per-frame encode/decode — MJPEG (libjpeg-turbo), QOI, ZSTD-raw, VA-API H.264 intra; used by screen grab source and archive |
| 14 | `xorg` | not started | X11 screen geometry queries (XRandR), screen grab source (calls codec), frame viewer sink — see architecture.md |
| 15 | `web node` | not started | Node.js/Express peer — speaks binary protocol on socket side, HTTP/WebSocket to browser; `protocol.mjs` mirrors C protocol module |
| — | `mjpeg_scan` | future | EOI marker scanner for misbehaving hardware that does not deliver clean per-buffer frames; not part of the primary pipeline |
| — | `config` | future | Unified config file reader; nodes currently configured via CLI args — needed before production deployment |
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