source2-demo

source2-demo is a Rust library for parsing Source 2 engine demo files.

Supported Games

• Dota 2
• Deadlock
• Counter-Strike 2

Installation

Add the following to your Cargo.toml and enable the feature for the game you want to parse:

[dependencies]
# For Dota 2
source2-demo = { version = "0.4", features = ["dota"] }

# For Deadlock
# source2-demo = { version = "0.4", features = ["deadlock"] }

# For Counter-Strike 2
# source2-demo = { version = "0.4", features = ["cs2"] }

Quick Start: Parsing Chat Messages

Here's a simple program that prints chat messages from a Dota 2 replay. It handles the CDotaUserMsgChatMessage protobuf message and prints the player's name and their message.

More examples can be found in the d2-examples and dl-examples directories.

use source2_demo::prelude::*;
use source2_demo::proto::*;

// Create a struct that implements the Default trait
#[derive(Default)]
struct Chat;

// Mark the impl block with the observer attribute
#[observer(all)]
impl Chat {
    // Use the on_message attribute to mark the protobuf message handler
    #[on_message]
    fn handle_chat_msg(
        &mut self,
        ctx: &Context,
        chat_msg: CDotaUserMsgChatMessage, // Use any protobuf message as an argument
    ) -> ObserverResult {
        if let Ok(pr) = ctx.entities().get_by_class_name("CDOTA_PlayerResource") {
            let name: String = property!(
                pr,
                "m_vecPlayerData.{:04}.m_iszPlayerName",
                chat_msg.source_player_id()
            );
            println!("{}: {}", name, chat_msg.message_text());
        }
        Ok(())
    }
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Create a parser
    let mut parser = Parser::from_reader(std::fs::File::open("replay.dem")?)?;

    // Register observers
    parser.register_observer::<Chat>();

    // Run the parser
    parser.run_to_end()?;

    Ok(())
}

Building Examples

To build the examples, clone the repository and use Cargo:

git clone https://github.com/Rupas1k/source2-demo
cd source2-demo

# Build examples for a specific game
cd dl-examples # d2-examples
cargo build --release

Features

The crate supports the following cargo features:

• dota - Enable Dota 2 replay parsing (includes Dota 2 protobufs)
• deadlock - Enable Deadlock replay parsing (includes Citadel protobufs)
• cs2 - Enable Counter-Strike 2 replay parsing (includes CS2 protobufs)
• mimalloc (default) - Use mimalloc as the global allocator for improved performance

You can enable multiple game features if needed:

source2-demo = { version = "*", features = ["dota", "cs2"] }

You can disable mimalloc if it causes issues on your platform (e.g., WebAssembly):

source2-demo = { version = "*", default-features = false }

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Credits

This project was inspired by and builds upon the work of other Source 2 demo parsers:

• clarity - Java-based Source 2 replay parser
• manta - Go-based Dota 2 replay parser

License

This project is dual-licensed under either:

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT License (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.