/* --------------------------------------------------------------------
 *  artnet_receiver.c  – tiny Art‑Net DMX receiver
 *
 *  This file contains only the pieces you need to:
 *      * open a UDP socket on port 6454,
 *      * receive ArtDMX packets,
 *      * extract the DMX data (up to 512 bytes),
 *      * copy the first N bytes into the variables of the main program.
 *
 *  The code is deliberately simple – it ignores ArtPoll, ArtSync,
 *  multiple universes, etc.  If you need those features you can replace
 *  the receive loop with libartnet or another full implementation.
 * -------------------------------------------------------------------- */

#ifndef ARTNET_RECEIVER_H
#define ARTNET_RECEIVER_H

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include <pthread.h>

/* ---------------------------------------------------------------
 *  Public API – call from the main program
 *
 *  artnet_init()   : creates the receiving thread.
 *  artnet_stop()   : asks the thread to terminate and joins it.
 * --------------------------------------------------------------- */
bool artnet_init(void);          /* returns true on success   */
void artnet_stop(void);

/* ---------------------------------------------------------------
 *  The variables that the Art‑Net thread will write to.
 *  They are declared `extern` here and defined in the main file.
 * --------------------------------------------------------------- */
extern int16_t  rotAnglesDeg[12];   /* 0 … 180°   (mapped from 0‑255) */
extern int      LINE_THICKNESS;    /* 1 … 10    (clamped)            */
extern int      MARGIN_TOP;        /* 0 … 200 px (scaled)            */
extern int      MARGIN_BOTTOM;     /* 0 … 200 px (scaled)            */

#endif /* ARTNET_RECEIVER_H */