# camera_example

libcamera viewfinder (XRGB8888) -> libjpeg-turbo -> TCP. One client at a time.

Wire format: `[uint32 BE jpeg_size][jpeg_bytes]` repeating.

Knobs are constants at the top of `camera.cpp` (fps, quality, AF mode, lens
position, port, resolution).

## Build on the Pi

    apt install g++ pkg-config libcamera-dev libevent-dev libjpeg-turbo8-dev
    make

## Cross-build (x86 -> armv6l) on a Nix host

    nix build

The resulting binary links against `/nix/store`, so it only runs on a Pi that
has those libs available (i.e. nix installed). For a vanilla Pi OS target,
use the Makefile on the device, or `./deploy.sh user@host` to rsync+build.

## Receive

Any TCP client that reads the framed JPEGs. Quick check:

    nc <pi-ip> 5000 | ffplay -f mjpeg -