work

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "submodules/rohrkabel"]
 	path = submodules/rohrkabel
 	url = https://github.com/Soundux/rohrkabel
+[submodule "submodules/channel"]
+	path = submodules/channel
+	url = https://github.com/Soundux/channel.git

CMakeLists.txt

@@ -45,7 +45,6 @@ set(discord-screenaudio_SRC
   src/log.cpp
   src/userscript.cpp
   src/centralwidget.cpp
-  src/localserver.cpp
   resources.qrc
 )
 
@@ -64,15 +63,20 @@ if(GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
   endif()
 endif()
 
-if(NOT EXISTS "${PROJECT_SOURCE_DIR}/submodules/rohrkabel/CMakeLists.txt")
-  message(FATAL_ERROR "Rohrkabel was not found since you are not in a Git checkout or have GIT_SUBMODULE disabled. Please provide rohrkabel manually to `./submodules/rohrkabel`.")
-endif()
+function(add_git_subdirectory SUBMODULE)
+  if(NOT EXISTS "${PROJECT_SOURCE_DIR}/submodules/${SUBMODULE}/CMakeLists.txt")
+    message(FATAL_ERROR "Submodule ${SUBMODULE} was not found since you are not in a Git checkout or have GIT_SUBMODULE disabled. Please provide ${SUBMODULE} manually to `./submodules/${SUBMODULE}`.")
+  endif()
 
-add_subdirectory(submodules/rohrkabel)
+  add_subdirectory(submodules/${SUBMODULE})
+endfunction()
+
+add_git_subdirectory(rohrkabel)
+add_git_subdirectory(channel)
 
 add_executable(discord-screenaudio ${discord-screenaudio_SRC})
 
-target_link_libraries(discord-screenaudio Qt::Widgets Qt::WebEngineWidgets rohrkabel)
+target_link_libraries(discord-screenaudio Qt::Widgets Qt::WebEngineWidgets rohrkabel channel)
 
 if(KF5Notifications_FOUND)
   target_link_libraries(discord-screenaudio KF5::Notifications)

README.md

@@ -62,9 +62,6 @@ You have multiple options:
 With apt:
 `apt install -y build-essential cmake qtbase5-dev qtwebengine5-dev libkf5notifications-dev libkf5xmlgui-dev libkf5globalaccel-dev pkg-config libpipewire-0.3-dev git`
 
-With dnf:
-`dnf install @development-tools cmake qt5-qtbase-devel qt5-qtwebengine-devel kf5-knotifications-devel kf5-kxmlgui-devel kf5-kglobalaccel-devel pkgconfig pipewire-devel git`
-
 ### Building
 
 First, clone the repository:

assets/userscript.js

@@ -1,14 +1,12 @@
 navigator.mediaDevices.chromiumGetDisplayMedia =
   navigator.mediaDevices.getDisplayMedia;
-navigator.mediaDevices.chromiumGetUserMedia =
-  navigator.mediaDevices.getUserMedia;
 
 function sleep(ms) {
   return new Promise((resolve) => setTimeout(resolve, ms));
 }
 
 const getAudioDevice = async (nameOfAudioDevice) => {
-  await navigator.mediaDevices.chromiumGetUserMedia({
+  await navigator.mediaDevices.getUserMedia({
     audio: true,
   });
   let audioDevice;
@@ -25,16 +23,6 @@ const getAudioDevice = async (nameOfAudioDevice) => {
   return audioDevice;
 };
 
-function setGetUserMedia() {
-  const getUserMedia = async (constraints) => {
-    return await navigator.mediaDevices.chromiumGetUserMedia({
-      video: constraints?.video || false,
-      audio: { ...constraints?.audio, autoGainControl },
-    });
-  };
-  navigator.mediaDevices.getUserMedia = getUserMedia;
-}
-
 function setGetDisplayMedia(video = true, overrideArgs = undefined) {
   const getDisplayMedia = async (...args) => {
     var id;
@@ -46,27 +34,26 @@ function setGetDisplayMedia(video = true, overrideArgs = undefined) {
     } catch (error) {
       id = "default";
     }
-    let captureSystemAudioStream =
-      await navigator.mediaDevices.chromiumGetUserMedia({
-        audio: {
-          // We add our audio constraints here, to get a list of supported constraints use navigator.mediaDevices.getSupportedConstraints();
-          // We must capture a microphone, we use default since its the only deviceId that is the same for every Chromium user
-          deviceId: {
-            exact: id,
-          },
-          // We want auto gain control, noise cancellation and noise suppression disabled so that our stream won't sound bad
-          autoGainControl: false,
-          echoCancellation: false,
-          noiseSuppression: false,
-          // By default Chromium sets channel count for audio devices to 1, we want it to be stereo in case we find a way for Discord to accept stereo screenshare too
-          channelCount: 2,
-          // You can set more audio constraints here, bellow are some examples
-          //latency: 0,
-          //sampleRate: 48000,
-          //sampleSize: 16,
-          //volume: 1.0
+    let captureSystemAudioStream = await navigator.mediaDevices.getUserMedia({
+      audio: {
+        // We add our audio constraints here, to get a list of supported constraints use navigator.mediaDevices.getSupportedConstraints();
+        // We must capture a microphone, we use default since its the only deviceId that is the same for every Chromium user
+        deviceId: {
+          exact: id,
         },
-      });
+        // We want auto gain control, noise cancellation and noise suppression disabled so that our stream won't sound bad
+        autoGainControl: false,
+        echoCancellation: false,
+        noiseSuppression: false,
+        // By default Chromium sets channel count for audio devices to 1, we want it to be stereo in case we find a way for Discord to accept stereo screenshare too
+        channelCount: 2,
+        // You can set more audio constraints here, bellow are some examples
+        //latency: 0,
+        //sampleRate: 48000,
+        //sampleSize: 16,
+        //volume: 1.0
+      },
+    });
     let [track] = captureSystemAudioStream.getAudioTracks();
     const gdm = await navigator.mediaDevices.chromiumGetDisplayMedia(
       ...(overrideArgs
@@ -81,7 +68,6 @@ function setGetDisplayMedia(video = true, overrideArgs = undefined) {
 }
 
 setGetDisplayMedia();
-setGetUserMedia();
 
 let userscript;
 let muteBtn;
@@ -90,7 +76,6 @@ let streamStartBtn;
 let streamStartBtnInitialDisplay;
 let streamStartBtnClone;
 let resolutionString;
-let autoGainControl = true;
 const clonedElements = [];
 const hiddenElements = [];
 let wasStreamActive = false;
@@ -174,10 +159,6 @@ function main() {
     streamStartBtnClone.remove();
   });
 
-  userscript.getPref("disableAutomaticGain", false).then((disabled) => {
-    autoGainControl = !disabled;
-  });
-
   function updateUserstyles() {
     userscript.log("Loading userstyles...");
     userscript.loadingMessage = "Loading userstyles...";
@@ -387,29 +368,5 @@ function main() {
         }
       }
     }
-
-    for (const el of document.getElementsByClassName("sensitivity-3A7Gs9")) {
-      if (
-        el.getElementsByTagName("div").length > 0 &&
-        !document.getElementById("discord-screenaudio-gaintoggle")
-      ) {
-        const toggle = createSwitch(
-          "Disable automatic gain",
-          await userscript.getPref("disableAutomaticGain", false),
-          async (disabled) => {
-            await userscript.setPref("disableAutomaticGain", disabled);
-            autoGainControl = !disabled;
-            setGetUserMedia();
-            if (disabled)
-              userscript.showInformation(
-                "discord-screenaudio",
-                "If you are currently in a call, this setting may only take effect after you rejoin the call or restart discord-screenaudio."
-              );
-          }
-        );
-        toggle.id = "discord-screenaudio-gaintoggle";
-        el.getElementsByTagName("div")[0].appendChild(toggle);
-      }
-    }
   }, 500);
 }

src/discordpage.cpp

@@ -282,11 +282,10 @@ void DiscordPage::javaScriptConsoleMessage(
           ansi += "\033[" + cssAnsiColorMap[color] + "m";
       }
     }
-    if (endOfStyles < lines.length())
-      qDebug(discordLog) << (ansi + lines[0].trimmed() + "\033[0m " +
-                             lines[endOfStyles].trimmed())
-                                .toUtf8()
-                                .constData();
+    qDebug(discordLog) << (ansi + lines[0].trimmed() + "\033[0m " +
+                           lines[endOfStyles].trimmed())
+                              .toUtf8()
+                              .constData();
     for (auto line : lines.mid(endOfStyles + 1)) {
       qDebug(discordLog) << line.toUtf8().constData();
     }

src/localserver.cpp

@@ -1,22 +0,0 @@
-#include "localserver.h"
-
-bool isProgramRunning(const QString &program_name) {
-  QLocalSocket socket;
-  socket.connectToServer(program_name);
-  if (socket.waitForConnected()) {
-    return true; // program is already running
-  }
-  return false;
-}
-
-void showErrorMessage(const char *text) {
-  QMessageBox msgBox;
-
-  msgBox.setIcon(QMessageBox::Critical);
-  msgBox.setText(text);
-  msgBox.setStandardButtons(QMessageBox::Ok);
-  msgBox.setDefaultButton(QMessageBox::Ok);
-  msgBox.setWindowIcon(QIcon(":assets/de.shorsh.discord-screenaudio.png"));
-
-  msgBox.exec();
-}

src/localserver.h

@@ -1,9 +0,0 @@
-#pragma once
-#include "mainwindow.h"
-
-#include <QLocalServer>
-#include <QLocalSocket>
-#include <QMessageBox>
-
-bool isProgramRunning(const QString &program_name);
-void showErrorMessage(const char *text);

src/main.cpp

@@ -1,4 +1,3 @@
-#include "localserver.h"
 #include "mainwindow.h"
 #include "virtmic.h"
 
@@ -8,14 +7,10 @@
 
 #include <QApplication>
 #include <QCommandLineParser>
-#include <QLocalServer>
-#include <QLocalSocket>
 #include <QLoggingCategory>
-#include <QMessageBox>
 
 int main(int argc, char *argv[]) {
   QApplication app(argc, argv);
-
   QApplication::setApplicationName("discord-screenaudio");
   QApplication::setWindowIcon(
       QIcon(":assets/de.shorsh.discord-screenaudio.png"));
@@ -29,9 +24,6 @@ int main(int argc, char *argv[]) {
       "Custom Discord client with the ability to stream audio on Linux");
   parser.addHelpOption();
   parser.addVersionOption();
-  QCommandLineOption virtmicOption("virtmic", "Start the Virtual Microphone",
-                                   "target");
-  parser.addOption(virtmicOption);
   QCommandLineOption degubOption("remote-debugging",
                                  "Open Chromium Remote Debugging on port 9222");
   parser.addOption(degubOption);
@@ -41,10 +33,6 @@ int main(int argc, char *argv[]) {
 
   parser.process(app);
 
-  if (parser.isSet(virtmicOption)) {
-    Virtmic::start(parser.value(virtmicOption));
-  }
-
   qputenv("QTWEBENGINE_CHROMIUM_FLAGS",
           "--enable-features=WebRTCPipeWireCapturer " +
               qgetenv("QTWEBENGINE_CHROMIUM_FLAGS"));
@@ -55,20 +43,6 @@ int main(int argc, char *argv[]) {
                 qgetenv("QTWEBENGINE_CHROMIUM_FLAGS"));
 
   MainWindow w(parser.isSet(notifySendOption));
-
-  // Check if discord is already running
-  QString program_name = "discord-screenaudio";
-  if (isProgramRunning(program_name)) {
-    // if running show error message
-    showErrorMessage("discord-screenaudio is already running");
-    return 1;
-  }
-
-  // open server so we can check if discord is running
-  QLocalServer server;
-  server.listen(program_name);
-  QObject::connect(&server, &QLocalServer::newConnection, []() {});
-
   w.show();
 
   return app.exec();

src/mainwindow.cpp

@@ -30,7 +30,6 @@ MainWindow::MainWindow(bool useNotifySend, QWidget *parent)
   m_centralWidget = new CentralWidget(this);
   setCentralWidget(m_centralWidget);
   setupTrayIcon();
-  setMinimumSize(800, 300);
   if (m_settings->contains("geometry")) {
     restoreGeometry(m_settings->value("geometry").toByteArray());
   } else {

src/mainwindow.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "centralwidget.h"
+#include "virtmic.h"
 
 #include <QMainWindow>
 #include <QMenu>

src/streamdialog.cpp

@@ -1,4 +1,5 @@
 #include "streamdialog.h"
+#include "mainwindow.h"
 #include "virtmic.h"
 
 #include <QComboBox>

src/userscript.cpp

@@ -42,12 +42,12 @@ void UserScript::setupHelpMenu() {
   aboutData.addCredit(
       "Curve", "For creating the Rohrkabel library used in this project.",
       QString(), "https://github.com/Curve");
-  aboutData.addComponent("Rohrkabel", "A C++ RAII Pipewire-API Wrapper", "1.3",
+  aboutData.addComponent("Rohrkabel", "A C++ RAII Pipewire-API Wrapper", "1.5",
                          "https://github.com/Soundux/rohrkabel");
-  aboutData.addComponent("arRPC",
-                         "An open implementation of Discord's local RPC "
-                         "servers<br>Copyright (c) 2022 OpenAsar",
-                         nullptr, "https://github.com/OpenAsar/arrpc");
+  aboutData.addComponent(
+      "Soundux/channel ",
+      "A C++ implementation of Rust's std::sync::mpsc::channel", nullptr,
+      "https://github.com/Soundux/channel");
   m_helpMenu = new KHelpMenu(MainWindow::instance(), aboutData);
 #endif
 }
@@ -182,7 +182,3 @@ void UserScript::showThemeDialog() {
 void UserScript::installUserStyles(QString url) {
   emit shouldInstallUserStyles(url);
 }
-
-void UserScript::showInformation(QString title, QString message) {
-  QMessageBox::information(MainWindow::instance(), title, message);
-}

src/userscript.h

@@ -72,7 +72,6 @@ public Q_SLOTS:
   void showShortcutsDialog();
   void showHelpMenu();
   void showStreamDialog();
-  void showInformation(QString title, QString message);
   void stopVirtmic();
   void startVirtmic(QString target);
   void showThemeDialog();

src/virtmic.cpp

@@ -1,194 +1,174 @@
 #include "virtmic.h"
 #include "log.h"
 
-#include <rohrkabel/loop/main.hpp>
-#include <rohrkabel/registry/registry.hpp>
+QThread virtmicThread;
+std::unique_ptr<pipewire::sender<Virtmic::set_target, Virtmic::terminate>>
+    senderr;
+std::unique_ptr<cr::receiver<Virtmic::new_targets>> receiverr;
 
-namespace Virtmic {
-
-const QStringList EXCLUDE_TARGETS{"Chromium input", "discord-screenaudio"};
-
-const std::string nullstr = "";
-const std::string &getTarget(const pipewire::spa::dict &props) {
-  if (props.count("media.class") &&
-      props.at("media.class") == "Stream/Output/Audio") {
-    if (props.count("application.name") && props.at("application.name") != "")
-      return props.at("application.name");
-    else if (props.count("application.process.binary") &&
-             props.at("application.process.binary") != "")
-      return props.at("application.process.binary");
-    else
-      return props.at("node.name");
-  } else
-    return nullstr;
-}
-
-QString qGetTarget(const pipewire::spa::dict &props) {
-  return QString::fromStdString(getTarget(props));
-}
-
-QVector<QString> getTargets() {
-  auto main_loop = pipewire::main_loop();
-  auto context = pipewire::context(main_loop);
-  auto core = pipewire::core(context);
-  auto reg = pipewire::registry(core);
-
-  QVector<QString> targets;
-
-  auto reg_listener = reg.listen<pipewire::registry_listener>();
-  reg_listener.on<pipewire::registry_event::global>(
-      [&](const pipewire::global &global) {
-        if (global.type == pipewire::node::type) {
-          auto node = reg.bind<pipewire::node>(global.id);
-          auto info = node.info();
-          QString name = qGetTarget(info.props);
-          if (name != "" && !EXCLUDE_TARGETS.contains(name) &&
-              !targets.contains(name)) {
-            targets.append(name);
-          }
-        }
-      });
-  core.update();
-
-  return targets;
-}
-
-void start(QString _target) {
-  std::map<std::uint32_t, pipewire::port> ports;
-  std::unique_ptr<pipewire::port> virt_fl, virt_fr;
-
-  std::map<std::uint32_t, pipewire::node_info> nodes;
-  std::map<std::uint32_t, pipewire::link_factory> links;
-
-  auto main_loop = pipewire::main_loop();
-  auto context = pipewire::context(main_loop);
-  auto core = pipewire::core(context);
-  auto reg = pipewire::registry(core);
-
-  auto link = [&](const std::string &target, pipewire::core &core) {
-    for (const auto &[port_id, port] : ports) {
-      if (!virt_fl || !virt_fr)
-        continue;
-
-      if (links.count(port_id))
-        continue;
-
-      if (port.info().direction == pipewire::port_direction::input)
-        continue;
-
-      if (!port.info().props.count("node.id"))
-        continue;
-
-      auto parent_id = std::stoul(port.info().props["node.id"]);
-
-      if (!nodes.count(parent_id))
-        continue;
-
-      auto &parent = nodes.at(parent_id);
-      std::string name = getTarget(parent.props);
-      if (name == target ||
-          (target == "[All Desktop Audio]" &&
-           !EXCLUDE_TARGETS.contains(QString::fromStdString(name)))) {
-        auto fl = port.info().props["audio.channel"] == "FL";
-        links.emplace(
-            port_id,
-            core.create<pipewire::link_factory>(
-                {fl ? virt_fl->info().id : virt_fr->info().id, port_id}));
-        qDebug(virtmicLog) << QString("Link: %1:%2 -> %3")
-                                  .arg(QString::fromStdString(name))
-                                  .arg(port_id)
-                                  .arg(fl ? virt_fl->info().id
-                                          : virt_fr->info().id)
-                                  .toUtf8()
-                                  .data();
-      }
-    }
-  };
-
-  std::string target = _target.toUtf8().toStdString();
-
-  auto virtual_mic = core.create("adapter",
-                                 {{"node.name", "discord-screenaudio-virtmic"},
-                                  {"media.class", "Audio/Source/Virtual"},
-                                  {"factory.name", "support.null-audio-sink"},
-                                  {"audio.channels", "2"},
-                                  {"audio.position", "FL,FR"}},
-                                 pipewire::node::type, pipewire::node::version,
-                                 pipewire::update_strategy::none);
-
-  if (target == "[None]") {
-    while (true) {
-      main_loop.run();
-    }
-    return;
+void Virtmic::instance() {
+  if (!virtmicThread.isRunning()) {
+    auto [main_sender, main_receiver] = cr::channel<new_targets>();
+    auto [pw_sender, pw_receiver] = pipewire::channel<set_target, terminate>();
+    Virtmic *virtmic =
+        new Virtmic(std::move(pw_receiver), std::move(main_sender));
+    virtmic->moveToThread(&virtmicThread);
+    virtmicThread.start();
+    QMetaObject::invokeMethod(virtmic, "run");
+    receiverr = std::make_unique<cr::receiver<Virtmic::new_targets>>(
+        std::move(main_receiver));
+    senderr = std::make_unique<
+        pipewire::sender<Virtmic::set_target, Virtmic::terminate>>(
+        std::move(pw_sender));
   }
+}
 
-  auto reg_events = reg.listen<pipewire::registry_listener>();
-  reg_events.on<pipewire::registry_event::global>(
-      [&](const pipewire::global &global) {
-        if (global.type == pipewire::node::type) {
-          auto node = reg.bind<pipewire::node>(global.id);
-          auto info = node.info();
-          std::string name = getTarget(info.props);
-          if (name == nullstr)
-            return;
-          qDebug(virtmicLog) << QString("Added: %1")
-                                    .arg(QString::fromStdString(name))
-                                    .toUtf8()
-                                    .data();
+void Virtmic::setTarget(QString target) {
+  senderr.get()->send<Virtmic::set_target>({target});
+}
 
-          if (!nodes.count(global.id)) {
-            nodes.emplace(global.id, node.info());
-            link(target, core);
-          }
-        }
-        if (global.type == pipewire::port::type) {
-          auto port = reg.bind<pipewire::port>(global.id);
-          auto info = port.info();
+void Virtmic::getTargets() { senderr.get()->send<Virtmic::get_targets>(); }
 
-          if (info.props.count("node.id")) {
-            auto node_id = std::stoul(info.props["node.id"]);
-
-            if (node_id == virtual_mic.id() &&
-                info.direction == pipewire::port_direction::input) {
-              if (info.props["audio.channel"] == "FL") {
-                virt_fl = std::make_unique<pipewire::port>(std::move(port));
-              } else {
-                virt_fr = std::make_unique<pipewire::port>(std::move(port));
-              }
-            } else {
-              ports.emplace(global.id, std::move(port));
-            }
-
-            link(target, core);
-          }
-        }
-      });
-
-  reg_events.on<pipewire::registry_event::global_removed>(
-      [&](const std::uint32_t id) {
-        if (nodes.count(id)) {
-          auto info = nodes.at(id);
-          std::string name = getTarget(info.props);
-          if (name == nullstr)
-            return;
-          qDebug(virtmicLog) << QString("Removed: %1")
-                                    .arg(QString::fromStdString(name))
-                                    .toUtf8()
-                                    .data();
-          nodes.erase(id);
-        }
-        if (ports.count(id)) {
-          ports.erase(id);
-        }
-        if (links.count(id)) {
-          links.erase(id);
-        }
-      });
+Virtmic::Virtmic(pipewire::receiver<set_target, terminate> receiver,
+                 cr::sender<new_targets> sender) {
+  m_receiver = std::make_unique<pipewire::receiver<set_target, terminate>>(
+      std::move(receiver));
+  m_sender = std::make_unique<cr::sender<new_targets>>(std::move(sender));
+  virtual_mic = std::make_unique<pipewire::proxy>(
+      std::move(*core.create("adapter",
+                             {{"node.name", "discord-screenaudio-virtmic"},
+                              {"media.class", "Audio/Source/Virtual"},
+                              {"factory.name", "support.null-audio-sink"},
+                              {"audio.channels", "2"},
+                              {"audio.position", "FL,FR"}},
+                             pipewire::node::type, pipewire::node::version,
+                             pipewire::update_strategy::none)
+                     .get()));
+  metadata_listener.on<pipewire::registry_event::global>(
+      [&](const auto &global) { globalEvent(global); });
+  metadata_listener.on<pipewire::registry_event::global_removed>(
+      [&](const std::uint32_t id) { globalRemovedEvent(id); });
+}
 
+void Virtmic::run() {
   while (true) {
     main_loop.run();
   }
 }
 
-} // namespace Virtmic
+void Virtmic::link() {
+  for (const auto &[port_id, port] : ports) {
+    auto port_info = port.info();
+    if (!virt_fl || !virt_fr)
+      continue;
+
+    if (links.count(port_id))
+      continue;
+
+    if (port_info.direction == pipewire::port_direction::input)
+      continue;
+
+    if (!port_info.props.count("node.id"))
+      continue;
+
+    auto parent_id = std::stoul(port_info.props["node.id"]);
+
+    if (!nodes.count(parent_id))
+      continue;
+
+    auto &parent = nodes[parent_id];
+    QString name;
+    if (parent.props.count("application.name") &&
+        parent.props["application.name"] != "")
+      name = QString::fromStdString(parent.props["application.name"]);
+    else
+      name = QString::fromStdString(parent.props["application.process.binary"]);
+
+    if (name == target ||
+        (target == "[All Desktop Audio]" && !EXCLUDE_TARGETS.contains(name))) {
+      auto fl = port_info.props["audio.channel"] == "FL";
+      links.emplace(port_id,
+                    *core.create_simple<pipewire::link>(fl ? virt_fl->info().id
+                                                           : virt_fr->info().id,
+                                                        port_id)
+                         .get());
+      qDebug(virtmicLog) << QString("Link: %1:%2 -> %3")
+                                .arg(name)
+                                .arg(port_id)
+                                .arg(fl ? virt_fl->info().id
+                                        : virt_fr->info().id)
+                                .toUtf8()
+                                .data();
+    }
+  }
+}
+
+void Virtmic::unlink() { links.clear(); }
+
+void Virtmic::globalEvent(const pipewire::global &global) {
+  if (global.type == pipewire::node::type) {
+    auto node = *reg.bind<pipewire::node>(global.id).get();
+    auto info = node.info();
+    std::string name;
+    if (info.props.count("application.name") &&
+        info.props["application.name"] != "")
+      name = info.props["application.name"];
+    else if (info.props.count("application.process.binary")) {
+      name = info.props["application.process.binary"];
+    } else
+      return;
+    qDebug(virtmicLog) << QString("Added: %1")
+                              .arg(QString::fromStdString(name))
+                              .toUtf8()
+                              .data();
+
+    if (!nodes.count(global.id)) {
+      nodes.emplace(global.id, node.info());
+      link();
+    }
+  }
+  if (global.type == pipewire::port::type) {
+    auto port = *reg.bind<pipewire::port>(global.id).get();
+    auto info = port.info();
+
+    if (info.props.count("node.id")) {
+      auto node_id = std::stoul(info.props["node.id"]);
+
+      if (node_id == virtual_mic.get()->id() &&
+          info.direction == pipewire::port_direction::input) {
+        if (info.props["audio.channel"] == "FL") {
+          virt_fl = std::make_unique<pipewire::port>(std::move(port));
+        } else {
+          virt_fr = std::make_unique<pipewire::port>(std::move(port));
+        }
+      } else {
+        ports.emplace(global.id, std::move(port));
+      }
+
+      link();
+    }
+  }
+}
+
+void Virtmic::globalRemovedEvent(const std::uint32_t id) {
+  if (nodes.count(id)) {
+    auto info = nodes.at(id);
+    std::string name;
+    if (info.props.count("application.name") &&
+        info.props["application.name"] != "")
+      name = info.props["application.name"];
+    else
+      name = info.props["application.process.binary"];
+    qDebug(virtmicLog) << QString("Removed: %1")
+                              .arg(QString::fromStdString(name))
+                              .toUtf8()
+                              .data();
+    nodes.erase(id);
+  }
+  if (ports.count(id)) {
+    ports.erase(id);
+  }
+  if (links.count(id)) {
+    links.erase(id);
+  }
+}

src/virtmic.h

@@ -1,12 +1,63 @@
 #pragma once
 
-#include <QString>
-#include <QVector>
+#include <cr/channel.hpp>
 #include <iostream>
+#include <rohrkabel/channel/channel.hpp>
+#include <rohrkabel/main_loop.hpp>
+#include <rohrkabel/registry/registry.hpp>
 
-namespace Virtmic {
+#include <QMap>
+#include <QScopedPointer>
+#include <QStringList>
+#include <QThread>
 
-QVector<QString> getTargets();
-void start(QString _target);
+class Virtmic : public QObject {
+  Q_OBJECT
+public:
+  static void setTarget(QString target);
+  static void getTargets();
 
-} // namespace Virtmic
+public:
+  struct set_target {
+    QString name;
+  };
+  struct get_targets {};
+  struct terminate {};
+  struct new_targets {
+    QStringList targets;
+  };
+
+protected:
+  static void instance();
+
+protected:
+  Virtmic(pipewire::receiver<set_target, terminate> receiver,
+          cr::sender<new_targets> sender);
+  void run();
+
+private:
+  std::unique_ptr<pipewire::receiver<set_target, terminate>> m_receiver;
+  std::unique_ptr<cr::sender<new_targets>> m_sender;
+
+  const QStringList EXCLUDE_TARGETS{"Chromium input", "discord-screenaudio"};
+  QString target;
+
+  pipewire::main_loop main_loop = pipewire::main_loop();
+  pipewire::context context = pipewire::context(main_loop);
+  pipewire::core core = pipewire::core(context);
+  pipewire::registry reg = pipewire::registry(core);
+
+  pipewire::registry_listener metadata_listener =
+      reg.listen<pipewire::registry_listener>();
+  std::unique_ptr<pipewire::proxy> virtual_mic;
+
+  std::map<uint32_t, pipewire::port> ports;
+  std::unique_ptr<pipewire::port> virt_fl, virt_fr;
+  std::map<uint32_t, pipewire::node_info> nodes;
+  std::map<uint32_t, pipewire::link> links;
+
+  void link();
+  void unlink();
+  void globalEvent(const pipewire::global &global);
+  void globalRemovedEvent(const std::uint32_t id);
+};