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Boost WASAPI IO thread priority #838

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merged 1 commit into from
Feb 21, 2024
Merged

Boost WASAPI IO thread priority #838

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16 changes: 16 additions & 0 deletions src/host/wasapi/stream.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ use std::ptr;
use std::sync::mpsc::{channel, Receiver, SendError, Sender};
use std::thread::{self, JoinHandle};
use windows::Win32::Foundation;
use windows::Win32::Foundation::HANDLE;
use windows::Win32::Foundation::WAIT_OBJECT_0;
use windows::Win32::Media::Audio;
use windows::Win32::System::SystemServices;
Expand Down Expand Up @@ -271,6 +272,8 @@ fn run_input(
data_callback: &mut dyn FnMut(&Data, &InputCallbackInfo),
error_callback: &mut dyn FnMut(StreamError),
) {
boost_current_thread_priority();

loop {
match process_commands_and_await_signal(&mut run_ctxt, error_callback) {
Some(ControlFlow::Break) => break,
Expand Down Expand Up @@ -298,6 +301,8 @@ fn run_output(
data_callback: &mut dyn FnMut(&mut Data, &OutputCallbackInfo),
error_callback: &mut dyn FnMut(StreamError),
) {
boost_current_thread_priority();

loop {
match process_commands_and_await_signal(&mut run_ctxt, error_callback) {
Some(ControlFlow::Break) => break,
Expand All @@ -320,6 +325,17 @@ fn run_output(
}
}

fn boost_current_thread_priority() {
unsafe {
let thread_id = Threading::GetCurrentThreadId();

let _ = Threading::SetThreadPriority(
HANDLE(thread_id as isize),
Threading::THREAD_PRIORITY_TIME_CRITICAL,
);
}
}

enum ControlFlow {
Break,
Continue,
Expand Down
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