Add normal mic support on Linux by using loopback modules, and remove all unnecessary double stream code which wouldnt work anyway, add Windows normal mic support as well, by using target_os windows blocks and running 2 separate streams.

2026-03-10 17:19:24 +01:00 · 2026-02-05 18:27:41 +01:00
parent 21d9f6c08b
commit 83f53f8711
4 changed files with 107 additions and 86 deletions
--- a/src/linux_lib.rs
+++ b/src/linux_lib.rs
@@ -17,37 +17,45 @@ fn pactl_list(sink_type: &str) -> Value {
    }
 }

-pub fn get_device_by_index(sink_type: &str, index: String) -> Value {
-    let devices = pactl_list(sink_type);
+pub fn get_sink_by_index(sink_type: &str, index: String) -> Value {
+    let sinks = pactl_list(sink_type);

-    for device in devices.as_array().unwrap_or(&vec![]) {
-        if device["index"].as_u64().expect("Device index is not a number").to_string() == index {
-            return device.clone();
+    for sink in sinks.as_array().unwrap_or(&vec![]) {
+        if sink["index"].as_u64().expect("sink index is not a number").to_string() == index {
+            return sink.clone();
        }
    }

    return Value::Null{};
 }

-pub fn move_playback_to_sink() {
+fn find_soundboard_sinks() -> Vec<Value> {
    let sink_inputs = pactl_list("sink-inputs");
-    for device in sink_inputs.as_array().unwrap_or(&vec![]) {
-        if device["properties"]["node.name"] == "alsa_playback.soundboard" {
-            let index = device["index"].as_u64().expect("Device index is not a number").to_string();
-            Command::new("pactl")
-            .args(&["move-sink-input", index.as_str(), "VirtualMic"]) // as_str is needed here as you cannot instantly dereference a growing String (Rust...)
-            .output()
-            .expect("Failed to execute process");
-        }
+    sink_inputs.as_array()
+               .unwrap_or(&vec![])
+               .iter()
+               .filter(|sink| {sink["properties"]["node.name"] == "alsa_playback.soundboard"})
+               .cloned()
+               .collect()
+}  
+
+pub fn move_playback_to_sink() {
+    let soundboard_sinks = find_soundboard_sinks();
+    for sink in soundboard_sinks {
+        let index = sink["index"].as_u64().expect("sink index is not a number").to_string();
+        Command::new("pactl")
+                    .args(&["move-sink-input", index.as_str(), "VirtualMic"]) // as_str is needed here as you cannot instantly dereference a growing String (Rust...)
+                    .output()
+                    .expect("Failed to execute process");
    }
 }

 pub fn list_outputs() -> Vec<(String, String)> {
    let source_outputs = pactl_list("source-outputs");
-    return source_outputs.as_array().unwrap_or(&vec![]).iter().filter_map(|device| {
-        let app_name = device["properties"]["application.name"].as_str()?;
-        let binary = device["properties"]["application.process.binary"].as_str().unwrap_or("Unknown");
-        let index = device["index"].as_u64().expect("Device index is not a number").to_string();
+    return source_outputs.as_array().unwrap_or(&vec![]).iter().filter_map(|sink| {
+        let app_name = sink["properties"]["application.name"].as_str()?;
+        let binary = sink["properties"]["application.process.binary"].as_str().unwrap_or("Unknown");
+        let index = sink["index"].as_u64().expect("sink index is not a number").to_string();
        Some((format!("{} ({})", app_name, binary), index))
    }).collect();
 }
@@ -60,36 +68,42 @@ pub fn move_index_to_virtualmic(index: String) {
 }

 pub fn create_virtual_mic_linux() -> OutputStream {
-    // original_host = cpal::host_from_id(cpal::HostId::Alsa).expect("Could not initialize audio routing using ALSA");
-    // normal_output = original_host.default_output_device().expect("Could not get default output device");
-
    Command::new("pactl")
        .args(&["load-module", "module-null-sink", "sink_name=VirtualMic", "sink_properties=device.description=\"Virtual_Microphone\""])
        .output()
-        .expect("Failed to execute process");
+        .expect("Failed to create VirtualMic");
+    
    Command::new("pactl")
        .args(&["load-module", "module-remap-source", "master=VirtualMic.monitor", "source_name=VirtualMicSource", "source_properties=device.description=\"Virtual_Mic_Source\""])
        .output()
-        .expect("Failed to execute process");
+        .expect("Failed to create VirtualMicSource");
+
+    Command::new("pactl")
+        .args(&["load-module", "module-loopback", "source=VirtualMic.monitor", "sink=@DEFAULT_SINK@", "latency_msec=1"])
+        .output()
+        .expect("Failed to create loopback");
+    
    Command::new("pactl")
        .args(&["set-sink-volume", "VirtualMic", "100%"])
        .output()
-        .expect("Failed to set sink volume");
-    Command::new("pactl")
-        .args(&["set-sink-volume", "VirtualMicSource", "100%"])
-        .output()
-        .expect("Failed to set sink volume");
+        .expect("Failed to set volume");
    
-    let host = cpal::host_from_id(cpal::HostId::Alsa).expect("Could not initialize audio routing using ALSA"); // Alsa needed so pulse default works
-    let virtual_mic = host.default_output_device().expect("Could not get default output device");
-    let virtual_mic_stream = OutputStreamBuilder::from_device(virtual_mic).expect("Unable to open default audio device").open_stream().expect("Failed to open stream");
+    let host = cpal::host_from_id(cpal::HostId::Alsa).expect("Could not initialize ALSA");
+    let device = host.default_output_device().expect("Could not get default output device");
+
+    let stream = OutputStreamBuilder::from_device(device)
+        .expect("Unable to open VirtualMic")
+        .open_stream()
+        .expect("Failed to open stream");
+
    move_playback_to_sink();
-    return virtual_mic_stream;
-    // return (OutputStreamBuilder::from_device(normal_output).expect("Unable to open default audio device").open_stream().expect("Failed to open stream"), OutputStreamBuilder::from_device(virtual_mic).expect("Unable to open default audio device").open_stream().expect("Failed to open stream"));
+
+    return stream;
 }

 pub fn reload_sound() {
    let script = r#"
+        pactl list modules short | grep "module-loopback" | cut -f1 | xargs -L1 pactl unload-module
        pactl list modules short | grep "Virtual_Microphone" | cut -f1 | xargs -L1 pactl unload-module
        pactl list modules short | grep "Virtual_Mic_Source" | cut -f1 | xargs -L1 pactl unload-module
    "#;
--- a/src/main.rs
+++ b/src/main.rs
@@ -15,8 +15,7 @@ mod linux_lib;
 mod windows_lib;

 use rodio::{
-    Decoder, OutputStream, OutputStreamBuilder, Sink, Source,
-    cpal::{self, traits::HostTrait},
+    Decoder, OutputStream, Sink, Source, cpal::{self, traits::HostTrait}, OutputStreamBuilder
 };

 #[derive(Serialize, Deserialize)]
@@ -28,13 +27,15 @@ struct JSONData {
 struct PlayingSound {
    file_path: String,
    length: f32,
-    virtual_sink: Sink,
-    // normal_sink: Sink
+    sink: Sink,
+    #[cfg(target_os = "windows")]
+    normal_sink: Sink
 }

 struct SoundSystem {
-    virtual_mic_stream: OutputStream,
-    // normal_output_stream: OutputStream,
+    #[cfg(target_os = "windows")]
+    normal_output_stream: OutputStream,
+    output_stream: OutputStream,
    paused: bool,
 }

@@ -52,32 +53,40 @@ struct AppState {

 const ALLOWED_FILE_EXTENSIONS: [&str; 4] = ["mp3", "wav", "flac", "ogg"];

-fn create_virtual_mic() -> OutputStream {
+fn create_virtual_mic() -> SoundSystem {
    #[cfg(target_os = "windows")]
-    return windows_lib::create_virtual_mic_windows();
+    {
+        let (normal, virtual_mic) = windows_lib::create_virtual_mic_windows();
+        return SoundSystem {
+            output_stream: virtual_mic,
+            normal_output_stream: normal,
+            paused: false,
+        };
+    }

    #[cfg(target_os = "linux")]
-    return linux_lib::create_virtual_mic_linux();
+    {
+        return SoundSystem {
+            output_stream: linux_lib::create_virtual_mic_linux(),
+            paused: false,
+        };
+    }

    #[allow(unreachable_code)]
    {
-        println!(
-            "Unknown/unsupported OS. Audio support may not work or may route to default output (headset, headphones, etc)."
-        );
        let host = cpal::default_host();
-        let virtual_mic = host
-            .default_output_device()
-            .expect("Could not get default output device");
-        return OutputStreamBuilder::from_device(virtual_mic)
-            .expect("Unable to open default audio device")
-            .open_stream()
-            .expect("Failed to open stream");
-        // normal_output = host.default_output_device().expect("Could not get default output device");
-        // return (OutputStreamBuilder::from_device(normal_output).expect("Unable to open default audio device").open_stream().expect("Failed to open stream"), OutputStreamBuilder::from_device(virtual_mic).expect("Unable to open default audio device").open_stream().expect("Failed to open stream"));
+        let device = host.default_output_device().expect("Could not get default output device");
+        SoundSystem {
+            output_stream: OutputStreamBuilder::from_device(device)
+                .expect("Unable to open device")
+                .open_stream()
+                .expect("Failed to open stream"),
+            paused: false,
+        }
    }
 }

-fn reload_sound() -> OutputStream {
+fn reload_sound() -> SoundSystem {
    #[cfg(target_os = "linux")]
    linux_lib::reload_sound();

@@ -96,9 +105,6 @@ fn list_outputs() -> Vec<(String, String)> {
 }

 fn main() {
-    let virtual_mic_stream = create_virtual_mic();
-    // let (normal_output_stream, virtual_mic_stream) = create_virtual_mic();
-
    App::new()
        .insert_resource(ClearColor(Color::BLACK))
        .add_plugins(
@@ -123,11 +129,7 @@ fn main() {
            json_data: JSONData { tabs: Vec::new() },
            current_directory: String::new(),
            currently_playing: Vec::new(),
-            sound_system: SoundSystem {
-                virtual_mic_stream,
-                // normal_output_stream,
-                paused: false,
-            },
+            sound_system: create_virtual_mic(),
            virt_outputs: Vec::new(),
            virt_output_index_switch: String::from("0"),
            virt_output_index: String::from("999"),
@@ -218,27 +220,31 @@ fn update_ui_scale_factor_system(egui_context: Single<(&mut EguiContextSettings,
 }

 fn play_sound(file_path: String, app_state: &mut AppState) {
-    let virtual_file = File::open(&file_path).unwrap();
-    let virtual_src = Decoder::new(BufReader::new(virtual_file)).unwrap();
-    let virtual_sink = Sink::connect_new(&app_state.sound_system.virtual_mic_stream.mixer());
-    let length = virtual_src
+    let file = File::open(&file_path).unwrap();
+    let src = Decoder::new(BufReader::new(file)).unwrap();
+    let sink = Sink::connect_new(&app_state.sound_system.output_stream.mixer());
+    let length = src
        .total_duration()
        .expect("Could not get source duration")
        .as_secs_f32();
-    virtual_sink.append(virtual_src);
-    virtual_sink.play();
+    sink.append(src);

-    // let normal_file = File::open(&file_path).unwrap();
-    // let normal_src = Decoder::new(BufReader::new(normal_file)).unwrap();
-    // let normal_sink = Sink::connect_new(&app_state.sound_system.normal_output_stream.mixer());
-    // normal_sink.append(normal_src);
-    // normal_sink.play();
+    #[cfg(target_os = "windows")]
+    {
+        let file2 = File::open(&file_path).unwrap();
+        let src2 = Decoder::new(BufReader::new(file2)).unwrap();
+        let normal_sink = Sink::connect_new(&app_state.sound_system.normal_output_stream.mixer());
+        sink2.append(src2);
+    }
+
+    sink.play();

    app_state.currently_playing.push(PlayingSound {
        file_path: file_path.clone(),
        length,
-        virtual_sink,
-        // normal_sink
+        sink,
+        #[cfg(target_os = "windows")]
+        normal_sink
    })
 }

@@ -263,8 +269,8 @@ fn ui_system(mut contexts: EguiContexts, mut app_state: ResMut<AppState>) -> Res
        #[cfg(target_os = "linux")]
        {
            let output_index = app_state.virt_output_index.clone();
-            let output_device = linux_lib::get_device_by_index("source-outputs", output_index);
-            if let Some(app_name) = output_device["properties"]["application.name"].as_str() {
+            let output_sink = linux_lib::get_sink_by_index("source-outputs", output_index);
+            if let Some(app_name) = output_sink["properties"]["application.name"].as_str() {
                mic_name = app_name.to_string();
            }
        }
@@ -338,8 +344,7 @@ fn ui_system(mut contexts: EguiContexts, mut app_state: ResMut<AppState>) -> Res
            .clicked()
        {
            app_state.currently_playing.clear();
-            app_state.sound_system.virtual_mic_stream = reload_sound();
-            // (app_state.sound_system.normal_output_stream, app_state.sound_system.virtual_mic_stream) = reload_sound();
+            app_state.sound_system.output_stream = reload_sound();
            println!("Sucessfully reloaded sound system!");
        }
    });
@@ -357,7 +362,7 @@ fn ui_system(mut contexts: EguiContexts, mut app_state: ResMut<AppState>) -> Res
                    ui.label(format!(
                        "{} - {:.2} / {:.2}",
                        playing_sound.file_path,
-                        playing_sound.virtual_sink.get_pos().as_secs_f32(),
+                        playing_sound.sink.get_pos().as_secs_f32(),
                        playing_sound.length
                    ));
                }
@@ -421,7 +426,7 @@ fn ui_system(mut contexts: EguiContexts, mut app_state: ResMut<AppState>) -> Res
    });

    app_state.currently_playing.retain(|playing_sound| {
-        playing_sound.virtual_sink.get_pos().as_secs_f32() <= (playing_sound.length - 0.01) // 0.01 offset needed here because of floating point errors and so its not exact
+        playing_sound.sink.get_pos().as_secs_f32() <= (playing_sound.length - 0.01) // 0.01 offset needed here because of floating point errors and so its not exact
    });

    Ok(())
--- a/src/windows_lib.rs
+++ b/src/windows_lib.rs
@@ -1,13 +1,14 @@
 use rodio::{OutputStream, OutputStreamBuilder, cpal::{self, traits::HostTrait, traits::DeviceTrait}};

-pub fn create_virtual_mic_windows() -> OutputStream {
+pub fn create_virtual_mic_windows() -> (OutputStream, OutputStream)  {
    let host = cpal::host_from_id(cpal::HostId::Wasapi).expect("Could not initialize audio routing using WasAPI");
    let virtual_mic = host.output_devices().expect("Could not list Output devices").find(|device| {
        device.name().ok().map(|name|{
            name.contains("CABLE Input") || name.contains("VB-Audio")
        }).unwrap_or(false)
    }).expect("Could not get default output device");
-    // normal_output = host.default_output_device().expect("Could not get default output device");
-    return OutputStreamBuilder::from_device(virtual_mic).expect("Unable to open default audio device").open_stream().expect("Failed to open stream");
-    // return (OutputStreamBuilder::from_device(normal_output).expect("Unable to open default audio device").open_stream().expect("Failed to open stream"), OutputStreamBuilder::from_device(virtual_mic).expect("Unable to open default audio device").open_stream().expect("Failed to open stream"));
+    
+    normal_output = host.default_output_device().expect("Could not get default output device");
+
+    return (OutputStreamBuilder::from_device(normal_output).expect("Unable to open default audio device").open_stream().expect("Failed to open stream"), OutputStreamBuilder::from_device(virtual_mic).expect("Unable to open default audio device").open_stream().expect("Failed to open stream"));
 }