Each ingest stream gets two reconciler resources (device, transport) with
dependencies: transport waits for device OPEN (needs format for STREAM_OPEN),
device waits for transport CONNECTED before starting capture.
START_INGEST sets wanted state and triggers a tick; the reconciler drives
device CLOSED→OPEN→STREAMING and transport DISCONNECTED→CONNECTED over
subsequent ticks. STOP_INGEST reverses both.
External events (transport drop, ingest thread error) use
reconciler_force_current to push state backward; the periodic 500ms timer
thread re-drives toward wanted state automatically.
All 8 stream slots are pre-allocated at startup. on_ingest_frame sends
VIDEO_FRAME messages over the outbound transport connection, protected by
a per-stream conn_mutex.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
reconciler: generic resource state machine — BFS pathfinding from current
to wanted state, dependency constraints, event/periodic tick model.
reconciler_cli exercises it with simulated device/transport/stream resources.
ingest: V4L2 capture module — open device, negotiate MJPEG format, MMAP
buffer pool, capture thread with on_frame callback. start/stop lifecycle
designed for reconciler management. Transport-agnostic: caller wires
on_frame to proto_write_video_frame.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
