Hear system audio wherever it plays, and record windowed games

Cargo.toml

@@ -61,7 +61,7 @@ opus = "0.4"
 # BSD-2-Clause; the default `source` feature compiles Cisco's openh264 from vendored source.
 openh264 = "0.9"
 tracing = "0.1"
-tracing-subscriber = "0.3"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 pollster = "1"
 # Config file (docs/adr/0005): TOML deserialized via serde. Both MIT/Apache.
 serde = { version = "1", features = ["derive"] }
@@ -116,6 +116,8 @@ cidre = { version = "=0.16.1", default-features = false, features = [
 # windows-capture drives the WGC session/frame pool; the `windows` crate (same 0.62.x
 # its API surfaces, so the D3D11 types unify) creates the shareable textures + NT handles.
 windows-capture = "2.0"
+# `#[implement]` (the process-loopback completion handler) expands to `::windows_core` paths.
+windows-core = "0.62"
 windows = { version = "0.62", features = [
     "Win32_Graphics_Direct3D11",
     "Win32_Graphics_Dxgi",

README.md

@@ -71,6 +71,19 @@ The app checks for updates on launch; one click updates both binaries in place.
 - Optional uploads to [ganked.tv](https://ganked.tv) or YouTube, only when you ask.
   Clips never leave your machine on their own.
 
+## Logs
+
+The recorder writes what it is doing to a small set of log files next to its data, capped at
+2 MB each and three files in total, so they never grow beyond 6 MB:
+
+- Windows: `%LOCALAPPDATA%\rewynd\logs\rewynd-recorder.log`
+- Linux: `$XDG_DATA_HOME/rewynd/logs/rewynd-recorder.log` (usually `~/.local/share/rewynd/logs/`)
+- macOS: `~/Library/Application Support/rewynd/logs/rewynd-recorder.log`
+
+Attach that file to a bug report about clips with no sound, a game that is not picked up,
+or a recorder that stops: it says which audio path ran, whether audio was flowing (a
+`peak` line a minute), and what the capture saw.
+
 ## Workspace layout
 
 | Crate | Role |

crates/app/src/tray.rs

@@ -38,6 +38,9 @@ static ICON: LazyLock<Vec<Icon>> = LazyLock::new(|| {
         .collect()
 });
 
+/// The tooltip title while nothing is wrong.
+pub const DEFAULT_STATUS: &str = "rewynd is recording";
+
 pub struct RewyndTray {
     tx: UnboundedSender<TrayCmd>,
     /// One-line pipeline status shown as the tooltip title; the recorder updates it on failures.
@@ -135,7 +138,7 @@ pub async fn spawn(
     let (tx, rx) = tokio::sync::mpsc::unbounded_channel();
     let tray = RewyndTray {
         tx,
-        status: "rewynd is recording".to_owned(),
+        status: DEFAULT_STATUS.to_owned(),
         mic_enabled,
     };
     let handle = tray.spawn().await?;

crates/capture/Cargo.toml

@@ -58,6 +58,7 @@ futures-util.workspace = true
 windows-capture.workspace = true
 # Window style/state queries (IsIconic, GWL_STYLE) behind the game heuristic.
 windows = { workspace = true, features = ["Win32_UI_WindowsAndMessaging"] }
+windows-core.workspace = true
 
 [target.'cfg(target_os = "windows")'.dev-dependencies]
 # The probe opens the shared handle on a second D3D11 device (D3D11CreateDevice

crates/capture/src/game.rs

@@ -97,7 +97,17 @@ pub fn steam_app_name(appid: u32) -> Option<String> {
 /// already the best stable key we have.
 fn clean_app_id(app_id: &str) -> String {
     let base = app_id.trim();
-    let base = base.strip_suffix(".exe").unwrap_or(base);
+    // A Windows process name keeps its whole stem: the dots in `Minecraft.Windows.exe`
+    // are part of the name, not a reverse-DNS id. The suffix is matched in any case,
+    // since executables are named `GAME.EXE` often enough.
+    if let Some((stem, suffix)) = base
+        .len()
+        .checked_sub(4)
+        .and_then(|at| base.is_char_boundary(at).then(|| base.split_at(at)))
+        && suffix.eq_ignore_ascii_case(".exe")
+    {
+        return stem.trim().to_owned();
+    }
     // Reverse-DNS desktop ids: keep the final segment, which names the app.
     let base = base.rsplit('.').next().unwrap_or(base);
     base.trim().to_owned()
@@ -158,6 +168,24 @@ mod tests {
         );
     }
 
+    #[test]
+    fn display_name_keeps_a_dotted_exe_stem_whole() {
+        let no_steam = |_: u32| None;
+        assert_eq!(
+            info("Minecraft.Windows.exe", "Minecraft").display_name_via(no_steam),
+            "Minecraft.Windows"
+        );
+        assert_eq!(
+            info("Battle.net.exe", "").display_name_via(no_steam),
+            "Battle.net"
+        );
+        assert_eq!(
+            info("ELDENRING.EXE", "").display_name_via(no_steam),
+            "ELDENRING"
+        );
+        assert_eq!(info(".exe", "Title").display_name_via(no_steam), "Title");
+    }
+
     #[test]
     fn display_name_prefers_the_steam_title() {
         let lookup = |appid: u32| (appid == 1245620).then(|| "ELDEN RING".to_owned());