feat(desktop): port v0.11.4-v0.15.2 from Tauri to Electron + Discord-parity audio (v0.16.0)
Chronological port of every Tauri release commit (v0.11.4 -> v0.15.2)
into the Electron rebuild, plus Discord-style audio handling that goes
beyond the Tauri original.
Highlights:
- All 17 Tauri release commits ported (audio fixes, custom notification
sound, Discord-style chat UX, profile banner, changelog page,
Discord-parity call UX, screen-share echo + re-watch UX, audio-loop
fix).
- Native napi-rs audio-loopback addon with WASAPI process-loopback:
* EXCLUDE_TARGET_PROCESS_TREE for full-screen shares -> peers
never hear themselves echoed back through the capture.
* INCLUDE_TARGET_PROCESS_TREE for window shares -> only the
picked window's audio is captured, not the whole OS mixer
(Discord parity).
* HWND -> PID resolution via Win32 GetWindowThreadProcessId.
- Discord-style screen-source picker (thumbnail grid, screens vs
apps tabs, live-refreshing thumbnails).
- Hash routing fix for packaged builds (file:// can't resolve
BrowserRouter paths).
- Tauri sources removed (apps/desktop/src-tauri).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
byGalax
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|
||||
panic = "abort"
|
||||
|
||||
[dependencies]
|
||||
napi = { version = "2", default-features = false, features = ["napi6"] }
|
||||
napi-derive = "2"
|
||||
|
||||
[target.'cfg(target_os = "windows")'.dependencies]
|
||||
# Match the Tauri reference exactly. Cargo.lock there pins 0.15.0; the
|
||||
# 0.15 family exposes AudioClient::new_application_loopback_client(pid,
|
||||
# include_tree) which is the load-bearing API for EXCLUDE_TARGET_PROCESS_TREE.
|
||||
wasapi = "0.15"
|
||||
|
||||
[build-dependencies]
|
||||
napi-build = "2"
|
||||
Binary file not shown.
@@ -0,0 +1,10 @@
|
||||
// napi-rs build helper. Generates the platform-specific binding glue
|
||||
// (e.g. typedefs, init symbols) that `napi build` consumes. Required for
|
||||
// every napi-rs crate; the build will silently produce a half-wired
|
||||
// binding without it.
|
||||
|
||||
extern crate napi_build;
|
||||
|
||||
fn main() {
|
||||
napi_build::setup();
|
||||
}
|
||||
+35
@@ -0,0 +1,35 @@
|
||||
/* tslint:disable */
|
||||
/* eslint-disable */
|
||||
|
||||
/* auto-generated by NAPI-RS */
|
||||
|
||||
/**
|
||||
* Start a process-loopback capture that excludes the current process
|
||||
* tree. The supplied JS callback is invoked from a background thread
|
||||
* with one argument: a Float32Array of interleaved f32 stereo samples
|
||||
* at 48kHz. Returns a numeric capture id that must be passed to
|
||||
* `stopCapture` when the share ends.
|
||||
*
|
||||
* Always excludes `std::process::id()` (whole-OS-mixer-minus-self).
|
||||
* For "include only this app" use `start_capture_for_pid` instead.
|
||||
*/
|
||||
export declare function startCapture(callback: (...args: any[]) => any): number
|
||||
/**
|
||||
* Start a process-loopback capture that INCLUDES the target PID's
|
||||
* process tree (and only that tree) — the WASAPI
|
||||
* INCLUDE_TARGET_PROCESS_TREE mode. Used for window-shares where we
|
||||
* want only the picked app's audio (Discord parity).
|
||||
*/
|
||||
export declare function startCaptureForPid(pid: number, callback: (...args: any[]) => any): number
|
||||
/**
|
||||
* Resolve the owning process id of a top-level window handle. The
|
||||
* renderer derives `hwnd` from desktopCapturer's `window:<HWND>:0`
|
||||
* source ids and we hand that to `start_capture_for_pid`.
|
||||
*/
|
||||
export declare function resolveWindowPid(hwnd: number): number
|
||||
/**
|
||||
* Tear down the capture for the given id. Safe to call on a missing id
|
||||
* (no-op) so the JS side doesn't have to track whether the stop has
|
||||
* already been issued by the screen-share teardown path.
|
||||
*/
|
||||
export declare function stopCapture(captureId: number): void
|
||||
@@ -0,0 +1,318 @@
|
||||
/* tslint:disable */
|
||||
/* eslint-disable */
|
||||
/* prettier-ignore */
|
||||
|
||||
/* auto-generated by NAPI-RS */
|
||||
|
||||
const { existsSync, readFileSync } = require('fs')
|
||||
const { join } = require('path')
|
||||
|
||||
const { platform, arch } = process
|
||||
|
||||
let nativeBinding = null
|
||||
let localFileExisted = false
|
||||
let loadError = null
|
||||
|
||||
function isMusl() {
|
||||
// For Node 10
|
||||
if (!process.report || typeof process.report.getReport !== 'function') {
|
||||
try {
|
||||
const lddPath = require('child_process').execSync('which ldd').toString().trim()
|
||||
return readFileSync(lddPath, 'utf8').includes('musl')
|
||||
} catch (e) {
|
||||
return true
|
||||
}
|
||||
} else {
|
||||
const { glibcVersionRuntime } = process.report.getReport().header
|
||||
return !glibcVersionRuntime
|
||||
}
|
||||
}
|
||||
|
||||
switch (platform) {
|
||||
case 'android':
|
||||
switch (arch) {
|
||||
case 'arm64':
|
||||
localFileExisted = existsSync(join(__dirname, 'audio-loopback.android-arm64.node'))
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.android-arm64.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-android-arm64')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
break
|
||||
case 'arm':
|
||||
localFileExisted = existsSync(join(__dirname, 'audio-loopback.android-arm-eabi.node'))
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.android-arm-eabi.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-android-arm-eabi')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
break
|
||||
default:
|
||||
throw new Error(`Unsupported architecture on Android ${arch}`)
|
||||
}
|
||||
break
|
||||
case 'win32':
|
||||
switch (arch) {
|
||||
case 'x64':
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.win32-x64-msvc.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.win32-x64-msvc.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-win32-x64-msvc')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
break
|
||||
case 'ia32':
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.win32-ia32-msvc.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.win32-ia32-msvc.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-win32-ia32-msvc')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
break
|
||||
case 'arm64':
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.win32-arm64-msvc.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.win32-arm64-msvc.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-win32-arm64-msvc')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
break
|
||||
default:
|
||||
throw new Error(`Unsupported architecture on Windows: ${arch}`)
|
||||
}
|
||||
break
|
||||
case 'darwin':
|
||||
localFileExisted = existsSync(join(__dirname, 'audio-loopback.darwin-universal.node'))
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.darwin-universal.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-darwin-universal')
|
||||
}
|
||||
break
|
||||
} catch {}
|
||||
switch (arch) {
|
||||
case 'x64':
|
||||
localFileExisted = existsSync(join(__dirname, 'audio-loopback.darwin-x64.node'))
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.darwin-x64.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-darwin-x64')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
break
|
||||
case 'arm64':
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.darwin-arm64.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.darwin-arm64.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-darwin-arm64')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
break
|
||||
default:
|
||||
throw new Error(`Unsupported architecture on macOS: ${arch}`)
|
||||
}
|
||||
break
|
||||
case 'freebsd':
|
||||
if (arch !== 'x64') {
|
||||
throw new Error(`Unsupported architecture on FreeBSD: ${arch}`)
|
||||
}
|
||||
localFileExisted = existsSync(join(__dirname, 'audio-loopback.freebsd-x64.node'))
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.freebsd-x64.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-freebsd-x64')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
break
|
||||
case 'linux':
|
||||
switch (arch) {
|
||||
case 'x64':
|
||||
if (isMusl()) {
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.linux-x64-musl.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.linux-x64-musl.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-linux-x64-musl')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
} else {
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.linux-x64-gnu.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.linux-x64-gnu.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-linux-x64-gnu')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
}
|
||||
break
|
||||
case 'arm64':
|
||||
if (isMusl()) {
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.linux-arm64-musl.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.linux-arm64-musl.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-linux-arm64-musl')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
} else {
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.linux-arm64-gnu.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.linux-arm64-gnu.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-linux-arm64-gnu')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
}
|
||||
break
|
||||
case 'arm':
|
||||
if (isMusl()) {
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.linux-arm-musleabihf.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.linux-arm-musleabihf.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-linux-arm-musleabihf')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
} else {
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.linux-arm-gnueabihf.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.linux-arm-gnueabihf.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-linux-arm-gnueabihf')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
}
|
||||
break
|
||||
case 'riscv64':
|
||||
if (isMusl()) {
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.linux-riscv64-musl.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.linux-riscv64-musl.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-linux-riscv64-musl')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
} else {
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.linux-riscv64-gnu.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.linux-riscv64-gnu.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-linux-riscv64-gnu')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
}
|
||||
break
|
||||
case 's390x':
|
||||
localFileExisted = existsSync(
|
||||
join(__dirname, 'audio-loopback.linux-s390x-gnu.node')
|
||||
)
|
||||
try {
|
||||
if (localFileExisted) {
|
||||
nativeBinding = require('./audio-loopback.linux-s390x-gnu.node')
|
||||
} else {
|
||||
nativeBinding = require('@chatapp/audio-loopback-native-linux-s390x-gnu')
|
||||
}
|
||||
} catch (e) {
|
||||
loadError = e
|
||||
}
|
||||
break
|
||||
default:
|
||||
throw new Error(`Unsupported architecture on Linux: ${arch}`)
|
||||
}
|
||||
break
|
||||
default:
|
||||
throw new Error(`Unsupported OS: ${platform}, architecture: ${arch}`)
|
||||
}
|
||||
|
||||
if (!nativeBinding) {
|
||||
if (loadError) {
|
||||
throw loadError
|
||||
}
|
||||
throw new Error(`Failed to load native binding`)
|
||||
}
|
||||
|
||||
const { startCapture, startCaptureForPid, resolveWindowPid, stopCapture } = nativeBinding
|
||||
|
||||
module.exports.startCapture = startCapture
|
||||
module.exports.startCaptureForPid = startCaptureForPid
|
||||
module.exports.resolveWindowPid = resolveWindowPid
|
||||
module.exports.stopCapture = stopCapture
|
||||
@@ -0,0 +1,32 @@
|
||||
{
|
||||
"name": "@chatapp/audio-loopback-native",
|
||||
"version": "0.1.0",
|
||||
"private": true,
|
||||
"description": "Native Windows process-loopback audio capture addon (excludes our own PID tree)",
|
||||
"main": "index.js",
|
||||
"types": "index.d.ts",
|
||||
"files": [
|
||||
"index.js",
|
||||
"index.d.ts",
|
||||
"*.node"
|
||||
],
|
||||
"napi": {
|
||||
"name": "audio-loopback",
|
||||
"triples": {
|
||||
"defaults": false,
|
||||
"additional": [
|
||||
"x86_64-pc-windows-msvc"
|
||||
]
|
||||
}
|
||||
},
|
||||
"scripts": {
|
||||
"build": "napi build --platform --release",
|
||||
"build:debug": "napi build --platform"
|
||||
},
|
||||
"devDependencies": {
|
||||
"@napi-rs/cli": "^2.18.0"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">= 18"
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,339 @@
|
||||
// Native system-audio capture addon for the ChatApp Electron desktop
|
||||
// client. Mirrors the proven Tauri implementation
|
||||
// (apps/desktop/src-tauri/src/screen_audio.rs in the legacy repo).
|
||||
//
|
||||
// Why a native addon at all when Electron already exposes a 'loopback'
|
||||
// audio source through setDisplayMediaRequestHandler? Because Chromium's
|
||||
// loopback captures the entire OS mixer including our own renderer's
|
||||
// playback — peers in a video call hear themselves echoed back when the
|
||||
// sharer ticks "system audio". Windows ships an EXCLUDE_TARGET_PROCESS_TREE
|
||||
// process-loopback mode that captures every render session except the
|
||||
// targeted PID's tree. We pass our own PID so the LiveKit playback never
|
||||
// re-enters the outgoing share.
|
||||
//
|
||||
// Wire format is fixed at 48kHz interleaved f32 stereo. The renderer-
|
||||
// side AudioWorklet (lib/loopbackAudio.ts) assumes that layout and feeds
|
||||
// samples into a MediaStreamDestination so LiveKit publishes a plain
|
||||
// ScreenShareAudio track.
|
||||
//
|
||||
// Windows-only for v1. macOS/Linux stubs return a clear napi::Error so
|
||||
// the renderer can fall through to the existing getUserMedia path.
|
||||
|
||||
#![allow(clippy::needless_return)]
|
||||
|
||||
use napi::bindgen_prelude::{Float32Array, Result};
|
||||
use napi::threadsafe_function::{
|
||||
ErrorStrategy, ThreadsafeFunction, ThreadsafeFunctionCallMode,
|
||||
};
|
||||
use napi::JsFunction;
|
||||
use napi_derive::napi;
|
||||
use std::collections::HashMap;
|
||||
use std::sync::atomic::{AtomicBool, AtomicU32, Ordering};
|
||||
use std::sync::{Arc, Mutex, OnceLock};
|
||||
use std::thread;
|
||||
|
||||
// Output format we always deliver to the frontend. Pinning a single fixed
|
||||
// format means the AudioWorklet never has to renegotiate — it just
|
||||
// assumes interleaved f32 stereo at 48kHz. WASAPI mix format is usually
|
||||
// already this on Windows 10+, so the resample/upmix branch inside
|
||||
// process-loopback's autoconvert is rarely hit.
|
||||
const OUTPUT_SAMPLE_RATE: u32 = 48_000;
|
||||
const OUTPUT_CHANNELS: u16 = 2;
|
||||
|
||||
static NEXT_ID: AtomicU32 = AtomicU32::new(1);
|
||||
static SESSIONS: OnceLock<Mutex<HashMap<u32, Session>>> = OnceLock::new();
|
||||
|
||||
fn sessions() -> &'static Mutex<HashMap<u32, Session>> {
|
||||
SESSIONS.get_or_init(|| Mutex::new(HashMap::new()))
|
||||
}
|
||||
|
||||
struct Session {
|
||||
stop: Arc<AtomicBool>,
|
||||
handle: Option<thread::JoinHandle<()>>,
|
||||
}
|
||||
|
||||
/// Start a process-loopback capture that excludes the current process
|
||||
/// tree. The supplied JS callback is invoked from a background thread
|
||||
/// with one argument: a Float32Array of interleaved f32 stereo samples
|
||||
/// at 48kHz. Returns a numeric capture id that must be passed to
|
||||
/// `stopCapture` when the share ends.
|
||||
///
|
||||
/// Always excludes `std::process::id()` (whole-OS-mixer-minus-self).
|
||||
/// For "include only this app" use `start_capture_for_pid` instead.
|
||||
#[napi]
|
||||
pub fn start_capture(callback: JsFunction) -> Result<u32> {
|
||||
spawn_capture_session(callback, std::process::id(), false)
|
||||
}
|
||||
|
||||
/// Start a process-loopback capture that INCLUDES the target PID's
|
||||
/// process tree (and only that tree) — the WASAPI
|
||||
/// INCLUDE_TARGET_PROCESS_TREE mode. Used for window-shares where we
|
||||
/// want only the picked app's audio (Discord parity).
|
||||
#[napi]
|
||||
pub fn start_capture_for_pid(pid: u32, callback: JsFunction) -> Result<u32> {
|
||||
spawn_capture_session(callback, pid, true)
|
||||
}
|
||||
|
||||
/// Resolve the owning process id of a top-level window handle. The
|
||||
/// renderer derives `hwnd` from desktopCapturer's `window:<HWND>:0`
|
||||
/// source ids and we hand that to `start_capture_for_pid`.
|
||||
#[napi]
|
||||
pub fn resolve_window_pid(hwnd: u32) -> Result<u32> {
|
||||
#[cfg(target_os = "windows")]
|
||||
{
|
||||
// Minimal FFI to user32!GetWindowThreadProcessId — pulling in a
|
||||
// full windows crate just for one call would balloon build
|
||||
// times. The function returns the thread id (we ignore it) and
|
||||
// writes the process id through the pointer.
|
||||
#[allow(non_snake_case)]
|
||||
extern "system" {
|
||||
fn GetWindowThreadProcessId(hWnd: usize, lpdwProcessId: *mut u32) -> u32;
|
||||
}
|
||||
let mut pid: u32 = 0;
|
||||
// SAFETY: GetWindowThreadProcessId tolerates an invalid HWND
|
||||
// (returns 0 thread id and leaves *lpdwProcessId untouched). We
|
||||
// detect the failure case by checking for pid == 0 below.
|
||||
let thread_id = unsafe { GetWindowThreadProcessId(hwnd as usize, &mut pid) };
|
||||
if thread_id == 0 || pid == 0 {
|
||||
return Err(napi::Error::from_reason(format!(
|
||||
"GetWindowThreadProcessId({hwnd}) failed — window may have closed"
|
||||
)));
|
||||
}
|
||||
Ok(pid)
|
||||
}
|
||||
|
||||
#[cfg(not(target_os = "windows"))]
|
||||
{
|
||||
let _ = hwnd;
|
||||
Err(napi::Error::from_reason(
|
||||
"resolve_window_pid only supported on Windows",
|
||||
))
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(target_os = "windows")]
|
||||
fn spawn_capture_session(
|
||||
callback: JsFunction,
|
||||
pid: u32,
|
||||
include_tree: bool,
|
||||
) -> Result<u32> {
|
||||
// ErrorStrategy::Fatal — the JS callback signature is `(samples)`
|
||||
// not `(err, samples)`, so we don't want napi to inject an
|
||||
// error slot. If anything goes wrong on the Rust side we tear
|
||||
// the session down and stop calling the callback.
|
||||
let tsfn: ThreadsafeFunction<Float32Array, ErrorStrategy::Fatal> =
|
||||
callback.create_threadsafe_function(0, |ctx| Ok(vec![ctx.value]))?;
|
||||
|
||||
let capture_id = NEXT_ID.fetch_add(1, Ordering::Relaxed);
|
||||
let stop = Arc::new(AtomicBool::new(false));
|
||||
let stop_clone = Arc::clone(&stop);
|
||||
|
||||
let handle = thread::Builder::new()
|
||||
.name(format!("audio-loopback-{capture_id}"))
|
||||
.spawn(move || {
|
||||
if let Err(err) = windows_loopback::capture_loop(
|
||||
capture_id,
|
||||
tsfn,
|
||||
stop_clone,
|
||||
pid,
|
||||
include_tree,
|
||||
) {
|
||||
eprintln!("audio-loopback {capture_id}: {err}");
|
||||
}
|
||||
})
|
||||
.map_err(|e| {
|
||||
napi::Error::from_reason(format!("failed to spawn audio thread: {e}"))
|
||||
})?;
|
||||
|
||||
sessions().lock().unwrap().insert(
|
||||
capture_id,
|
||||
Session {
|
||||
stop,
|
||||
handle: Some(handle),
|
||||
},
|
||||
);
|
||||
Ok(capture_id)
|
||||
}
|
||||
|
||||
#[cfg(not(target_os = "windows"))]
|
||||
fn spawn_capture_session(
|
||||
callback: JsFunction,
|
||||
_pid: u32,
|
||||
_include_tree: bool,
|
||||
) -> Result<u32> {
|
||||
let _ = callback;
|
||||
Err(napi::Error::from_reason(
|
||||
"system audio capture only supported on Windows",
|
||||
))
|
||||
}
|
||||
|
||||
/// Tear down the capture for the given id. Safe to call on a missing id
|
||||
/// (no-op) so the JS side doesn't have to track whether the stop has
|
||||
/// already been issued by the screen-share teardown path.
|
||||
#[napi]
|
||||
pub fn stop_capture(capture_id: u32) -> Result<()> {
|
||||
let session = sessions().lock().unwrap().remove(&capture_id);
|
||||
let Some(mut session) = session else {
|
||||
return Ok(());
|
||||
};
|
||||
session.stop.store(true, Ordering::Relaxed);
|
||||
if let Some(handle) = session.handle.take() {
|
||||
// Best-effort join — the capture loop polls `stop` every event
|
||||
// cycle (≤100ms) so this usually returns promptly. If a WASAPI
|
||||
// call is wedged we'd rather drop the handle than hang the JS
|
||||
// teardown path.
|
||||
let _ = handle.join();
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Windows loopback implementation
|
||||
// ---------------------------------------------------------------------------
|
||||
|
||||
#[cfg(target_os = "windows")]
|
||||
mod windows_loopback {
|
||||
use super::*;
|
||||
use wasapi::{initialize_mta, AudioClient, Direction, SampleType, ShareMode, WaveFormat};
|
||||
|
||||
// 200ms request buffer in 100ns units. Process-loopback clients
|
||||
// ignore the period for shared-mode but the API still requires a
|
||||
// non-zero value — picking 200ms keeps wakeups infrequent enough
|
||||
// that we don't spin the capture thread on idle audio.
|
||||
const REQUESTED_BUFFER_HNS: i64 = 2_000_000;
|
||||
|
||||
pub fn capture_loop(
|
||||
capture_id: u32,
|
||||
tsfn: ThreadsafeFunction<Float32Array, ErrorStrategy::Fatal>,
|
||||
stop: Arc<AtomicBool>,
|
||||
pid: u32,
|
||||
include_tree: bool,
|
||||
) -> std::result::Result<(), String> {
|
||||
// COM must be initialised on every thread that touches WASAPI.
|
||||
// MTA is the right model for a background capture thread —
|
||||
// STA would require message pumping we don't want to add.
|
||||
initialize_mta()
|
||||
.ok()
|
||||
.map_err(|e| format!("initialize_mta: {e:?}"))?;
|
||||
|
||||
// Process-loopback. Two modes — selected by `include_tree`:
|
||||
// false → EXCLUDE_TARGET_PROCESS_TREE: every render session on
|
||||
// the box *except* the given PID's tree. Default for
|
||||
// full-screen shares so LiveKit playback stays out of
|
||||
// the outgoing audio (we pass our own PID).
|
||||
// true → INCLUDE_TARGET_PROCESS_TREE: only the given PID's
|
||||
// tree. Used for window-shares so the captured audio
|
||||
// is exactly the picked app (Discord parity).
|
||||
// The `include_tree` flag is the load-bearing arg to
|
||||
// `new_application_loopback_client`; do not flip without
|
||||
// re-reading the wasapi crate's docs.
|
||||
let mut audio_client =
|
||||
AudioClient::new_application_loopback_client(pid, include_tree)
|
||||
.map_err(|e| format!("new_application_loopback_client: {e:?}"))?;
|
||||
|
||||
// Process-loopback only accepts caller-specified formats —
|
||||
// `get_mixformat` is documented as broken on this client. We
|
||||
// pin the wire format we already deliver downstream: 48kHz,
|
||||
// 32-bit float, stereo. `autoconvert=true` (the trailing `true`
|
||||
// arg to initialize_client) lets WASAPI mix arbitrary session
|
||||
// formats into ours so games at 44.1k or mono notification
|
||||
// sounds don't blow up the capture.
|
||||
let wave_format = WaveFormat::new(
|
||||
32,
|
||||
32,
|
||||
&SampleType::Float,
|
||||
OUTPUT_SAMPLE_RATE as usize,
|
||||
OUTPUT_CHANNELS as usize,
|
||||
None,
|
||||
);
|
||||
|
||||
audio_client
|
||||
.initialize_client(
|
||||
&wave_format,
|
||||
REQUESTED_BUFFER_HNS,
|
||||
&Direction::Capture,
|
||||
&ShareMode::Shared,
|
||||
true,
|
||||
)
|
||||
.map_err(|e| format!("initialize_client (process-loopback): {e:?}"))?;
|
||||
|
||||
let h_event = audio_client
|
||||
.set_get_eventhandle()
|
||||
.map_err(|e| format!("set_get_eventhandle: {e:?}"))?;
|
||||
let capture_client = audio_client
|
||||
.get_audiocaptureclient()
|
||||
.map_err(|e| format!("get_audiocaptureclient: {e:?}"))?;
|
||||
|
||||
audio_client
|
||||
.start_stream()
|
||||
.map_err(|e| format!("start_stream: {e:?}"))?;
|
||||
|
||||
let block_align = wave_format.get_blockalign() as usize;
|
||||
|
||||
while !stop.load(Ordering::Relaxed) {
|
||||
// 100ms timeout lets the loop check the stop flag even when
|
||||
// every excluded session is silent — there's nothing to
|
||||
// render so the event handle never fires.
|
||||
if h_event.wait_for_event(100).is_err() {
|
||||
continue;
|
||||
}
|
||||
|
||||
// Drain all packets available since the last wake — there
|
||||
// can be several queued if we were preempted.
|
||||
loop {
|
||||
if stop.load(Ordering::Relaxed) {
|
||||
break;
|
||||
}
|
||||
let frames_available = match capture_client.get_next_nbr_frames() {
|
||||
Ok(Some(n)) if n > 0 => n,
|
||||
Ok(_) => break,
|
||||
Err(e) => {
|
||||
eprintln!(
|
||||
"audio-loopback {capture_id}: get_next_nbr_frames: {e:?}"
|
||||
);
|
||||
break;
|
||||
}
|
||||
};
|
||||
|
||||
let bytes_needed = frames_available as usize * block_align;
|
||||
let mut raw = vec![0u8; bytes_needed];
|
||||
if let Err(e) = capture_client.read_from_device(&mut raw) {
|
||||
eprintln!(
|
||||
"audio-loopback {capture_id}: read_from_device: {e:?}"
|
||||
);
|
||||
break;
|
||||
}
|
||||
|
||||
// Reinterpret bytes as f32 little-endian samples. The
|
||||
// buffer is already 48kHz f32 stereo because process-
|
||||
// loopback autoconverted to our requested format. We
|
||||
// copy out into a Vec<f32> so napi can hand ownership
|
||||
// of a JS-owned ArrayBuffer to the renderer.
|
||||
let mut samples = Vec::<f32>::with_capacity(raw.len() / 4);
|
||||
let mut idx = 0;
|
||||
while idx + 4 <= raw.len() {
|
||||
let bytes = [raw[idx], raw[idx + 1], raw[idx + 2], raw[idx + 3]];
|
||||
samples.push(f32::from_le_bytes(bytes));
|
||||
idx += 4;
|
||||
}
|
||||
let _ = (OUTPUT_SAMPLE_RATE, OUTPUT_CHANNELS);
|
||||
|
||||
let payload = Float32Array::new(samples);
|
||||
// NonBlocking: never block the WASAPI capture thread on
|
||||
// a slow JS event loop — at 48kHz stereo a stalled
|
||||
// renderer would otherwise back-pressure the WASAPI
|
||||
// event handle and underrun every other consumer.
|
||||
let status = tsfn.call(payload, ThreadsafeFunctionCallMode::NonBlocking);
|
||||
if status != napi::Status::Ok {
|
||||
// Renderer went away or the threadsafe function was
|
||||
// released — stop cleanly.
|
||||
stop.store(true, Ordering::Relaxed);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let _ = audio_client.stop_stream();
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1 @@
|
||||
{"rustc_fingerprint":2812790340253412174,"outputs":{"7971740275564407648":{"success":true,"status":"","code":0,"stdout":"___.exe\nlib___.rlib\n___.dll\n___.dll\n___.lib\n___.dll\nC:\\Users\\denni\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\npacked\n___\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_abi=\"\"\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"msvc\"\ntarget_family=\"windows\"\ntarget_feature=\"cmpxchg16b\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_feature=\"sse3\"\ntarget_has_atomic=\"128\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"windows\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"pc\"\nwindows\n","stderr":""},"17747080675513052775":{"success":true,"status":"","code":0,"stdout":"rustc 1.95.0 (59807616e 2026-04-14)\nbinary: rustc\ncommit-hash: 59807616e1fa2540724bfbac14d7976d7e4a3860\ncommit-date: 2026-04-14\nhost: x86_64-pc-windows-msvc\nrelease: 1.95.0\nLLVM version: 22.1.2\n","stderr":""}},"successes":{}}
|
||||
@@ -0,0 +1,3 @@
|
||||
Signature: 8a477f597d28d172789f06886806bc55
|
||||
# This file is a cache directory tag created by cargo.
|
||||
# For information about cache directory tags see https://bford.info/cachedir/
|
||||
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||||
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||||
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|
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user