From cc601351052f21fbf0f2e9ad89567cade00efd27 Mon Sep 17 00:00:00 2001 From: nullprop Date: Fri, 24 May 2024 20:51:25 +0300 Subject: [PATCH] Initial commit --- .gitignore | 1 + Cargo.lock | 314 +++++++++++++++++++++++++++++++++++++++ Cargo.toml | 12 ++ LICENSE | 339 +++++++++++++++++++++++++++++++++++++++++++ README.md | 21 +++ examples/config.toml | 9 ++ src/main.rs | 212 +++++++++++++++++++++++++++ 7 files changed, 908 insertions(+) create mode 100644 .gitignore create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 LICENSE create mode 100644 README.md create mode 100644 examples/config.toml create mode 100644 src/main.rs diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ea8c4bf --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +/target diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..d747411 --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,314 @@ +# This file is automatically @generated by Cargo. +# It is not intended for 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+checksum = "c3c52e9c97a68071b23e836c9380edae937f17b9c4667bd021973efc689f618d" +dependencies = [ + "memchr", +] + +[[package]] +name = "wyz" +version = "0.5.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed" +dependencies = [ + "tap", +] diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..a1dcea3 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,12 @@ +[package] +name = "evdev-accel" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +evdev = "0.12.2" +figment = { version = "0.10.19", features = ["toml"] } +serde = { version = "1.0.202", features = ["derive"] } + diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..23cb790 --- /dev/null +++ b/LICENSE @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + {description} + Copyright (C) {year} {fullname} + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + {signature of Ty Coon}, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/README.md b/README.md new file mode 100644 index 0000000..b62ceaa --- /dev/null +++ b/README.md @@ -0,0 +1,21 @@ +# evdev-accel + +evdev based mouse acceleration. Grabs the input device and forwards events via a virtual uinput device. + +Largely based on [systemofapwne/leetmouse](https://github.com/systemofapwne/leetmouse). + +## Usage + +- Add yourself to the `input` usergroup for access to `/dev/input`, and relog. +- Copy [examples/config.toml](examples/config.toml) to `$HOME/.config/evdev-accel/config.toml` +- Edit the config to your liking +- `cargo run` + +## TODO + +- Add default config if no cfg file +- Add device selection to cfg file for non-interactive mode +- Min/Max accel settings +- Accel offset +- Different accel curves + diff --git a/examples/config.toml b/examples/config.toml new file mode 100644 index 0000000..144d2ac --- /dev/null +++ b/examples/config.toml @@ -0,0 +1,9 @@ +# In-game sens in games like Quake +sensitivity = 1.0 +# Amount of acceleration to apply +accel = 0.03 +# Sensitivity scaling before acceleration +pre_scale = 1.0 +# Sensitivity scaling after acceleration +post_scale = 0.05 + diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..fd20398 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,212 @@ +use core::panic; +use evdev::{ + raw_stream::RawDevice, uinput::VirtualDeviceBuilder, EventType, InputEvent, RelativeAxisType, + Synchronization, +}; +use figment::{ + providers::{Format, Toml}, + Figment, +}; +use serde::Deserialize; +use std::{env, path::Path, time::SystemTime}; + +// TODO default values if no cfg file +#[derive(Deserialize, Debug)] +struct Config { + sensitivity: f32, + accel: f32, + pre_scale: f32, + post_scale: f32, +} + +pub fn pick_device() -> RawDevice { + use std::io::prelude::*; + + let mut args = std::env::args_os(); + args.next(); + if let Some(dev_file) = args.next() { + RawDevice::open(dev_file).unwrap() + } else { + let mut devices = evdev::raw_stream::enumerate() + .map(|t| t.1) + .collect::>(); + assert!(devices.len() > 0); + // readdir returns them in reverse order from their eventN names for some reason + devices.reverse(); + for (i, d) in devices.iter().enumerate() { + println!("{}: {}", i, d.name().unwrap_or("Unnamed device")); + } + print!("Select the device [0-{}]: ", devices.len()); + let _ = std::io::stdout().flush(); + let mut chosen = String::new(); + std::io::stdin().read_line(&mut chosen).unwrap(); + let n = chosen.trim().parse::().unwrap(); + devices.into_iter().nth(n).unwrap() + } +} + +fn main() { + let home_path = env::var_os("HOME").expect("Failed to find HOME path"); + let cfg_path = Path::new(&home_path).join(".config/evdev-accel/config.toml"); + let config: Config = Figment::from(Toml::file(cfg_path)) + .extract() + .expect("Failed to load config.toml"); + println!("{config:?}"); + + let mut device = pick_device(); + println!("{device:?}"); + + let axes = device.supported_relative_axes(); + if !axes.map_or(false, |axes| { + axes.contains(RelativeAxisType::REL_X) && axes.contains(RelativeAxisType::REL_Y) + }) { + panic!("Device does not support relative axis"); + } + + device.grab().expect("Could not grab device"); + + let mut virt_device = VirtualDeviceBuilder::new() + .expect("Failed to create virtual device builder") + .name("evdev-accel virtual device") + .with_relative_axes( + device + .supported_relative_axes() + .expect("Failed to get relative axis from device"), + ) + .expect("Failed to add relative axis to virtual device") + .with_keys( + device + .supported_keys() + .expect("Failed to get supported keys from device"), + ) + .expect("Failed to add supported keys to virtual device") + .with_msc( + device + .misc_properties() + .expect("Failed to get misc properties from device"), + ) + .expect("Failed to add misc properties to virtual device") + .build() + .expect("Failed to build virtual device"); + + let mut prev_time = SystemTime::now(); + let mut delta_time_ms: f32; + let mut carry_x: f32 = 0.0; + let mut carry_y: f32 = 0.0; + let mut sync_x: i32 = 0; + let mut sync_y: i32 = 0; + let mut synced: bool = false; + let mut sync_events: Vec = Vec::new(); + loop { + for ev in device.fetch_events().unwrap() { + let mut drop = false; + match ev.kind() { + evdev::InputEventKind::RelAxis(axis) => match axis { + RelativeAxisType::REL_X => { + sync_x += ev.value(); + drop = true; + } + RelativeAxisType::REL_Y => { + sync_y += ev.value(); + drop = true; + } + _ => {} + }, + evdev::InputEventKind::Synchronization(sync) => match sync { + Synchronization::SYN_REPORT => { + synced = true; + drop = true; + } + _ => {} + }, + _ => {} + } + + if !drop { + sync_events.push(ev); + } + } + + if synced { + // TODO do we care about the actual time inside events? + let time = SystemTime::now(); + // leetmouse clamps lower limit to 1; + // not sure if we need to when dealing with evdev instead of usb driver...? + // lowest deltas between SYN_REPORTs seem pretty close to 1 on my 1000hz device. + // This might feel wrong if gamer society ever invents 2000hz mice. + delta_time_ms = + (time.duration_since(prev_time).unwrap().as_secs_f32() * 1000.0).clamp(1.0, 100.0); + prev_time = time; + let (x, y) = accelerate( + sync_x, + sync_y, + &mut carry_x, + &mut carry_y, + &config, + delta_time_ms, + ); + synced = false; + sync_x = 0; + sync_y = 0; + + if x != 0 { + sync_events.push(InputEvent::new_now( + EventType::RELATIVE, + RelativeAxisType::REL_X.0, + x, + )); + } + if y != 0 { + sync_events.push(InputEvent::new_now( + EventType::RELATIVE, + RelativeAxisType::REL_Y.0, + y, + )); + } + + virt_device.emit(&sync_events).unwrap(); + sync_events.clear(); + } + } +} + +fn accelerate( + x_og: i32, + y_og: i32, + carry_x: &mut f32, + carry_y: &mut f32, + config: &Config, + delta_time_ms: f32, +) -> (i32, i32) { + //println!("x {x_og} y {y_og} cx {carry_x} cy {carry_y} dt {delta_time_ms}"); + let mut accel_sens = config.sensitivity; + let mut x_f = x_og as f32; + let mut y_f = y_og as f32; + + x_f *= config.pre_scale; + y_f *= config.pre_scale; + + let velocity = f32::sqrt(x_f * x_f + y_f * y_f); + let rate = velocity / delta_time_ms; + + if rate > 0.0 { + accel_sens += rate * config.accel; + } + + accel_sens /= config.sensitivity; + + x_f *= accel_sens; + y_f *= accel_sens; + x_f *= config.post_scale; + y_f *= config.post_scale; + x_f += *carry_x; + y_f += *carry_y; + + let x = x_f.floor() as i32; + let y = y_f.floor() as i32; + *carry_x = x_f - x as f32; + *carry_y = y_f - y as f32; + + //println!("-> x {x} y {y} cx {carry_x} cy {carry_y}"); + return (x, y); +}