fh-telemetry

A small Odin program that currently listens for the UDP telemetry stream broadcast by Forza Horizon (the game's "Data Out" packet format), parses it into a structured type. Next steps are to start building an SL3/microui GUI dashboard to display the data with.

Procedural structure

main():
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Starts UDP receiver thread
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Starts Packet parsing thread
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Does nothing in a loop (reserved for GUI)
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entry_receiver():
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Creates UDP Socket (init_receiver())
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Receives packets into PACKET_BUF with recv_udp() in a loop
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entry_parser():
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Checks PACKET_IS_NEW in a loop, parse packet with data_from_packet() if true:
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Memcopies new packet into WORKING_DATA_BUF
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Assigns values to TELEMETRY_DATA based on packet data

Data Structures

I use global buffers as much as possible to minimize alocations

PACKET_BUF: Where net.recv_udp() dumps packets into
WORKING_DATA_BUF: Packets immediately get memcopied into this buffer when PACKET_IS_NEW == true
TELEMETRY_DATA: Struct that holds parsed data
TELEMETRY_DATA_IS_NEW: Will be used to tell the GUI to update once that's implemented