basic groundwork for pw

CMakeLists.txt

@@ -29,7 +29,7 @@ add_subdirectory(subprojects/sdbus-cpp)
 find_package(Threads REQUIRED)
 
 find_package(PkgConfig REQUIRED)
-pkg_check_modules(deps REQUIRED IMPORTED_TARGET wayland-client wayland-protocols cairo pango pangocairo libjpeg)
+pkg_check_modules(deps REQUIRED IMPORTED_TARGET wayland-client wayland-protocols cairo pango pangocairo libjpeg libpipewire-0.3 libspa-0.2)
 
 file(GLOB_RECURSE SRCFILES CONFIGURE_DEPENDS "src/*.cpp")
 add_executable(xdg-desktop-portal-hyprland ${SRCFILES})

src/core/PortalManager.cpp

@@ -6,6 +6,8 @@
 #include <protocols/wlr-foreign-toplevel-management-unstable-v1-protocol.h>
 #include <protocols/wlr-screencopy-unstable-v1-protocol.h>
 
+#include <pipewire/pipewire.h>
+
 void handleGlobal(void* data, struct wl_registry* registry, uint32_t name, const char* interface, uint32_t version) {
     g_pPortalManager->onGlobal(data, registry, name, interface, version);
 }
@@ -26,7 +28,7 @@ void CPortalManager::onGlobal(void* data, struct wl_registry* registry, uint32_t
 
     Debug::log(LOG, " | Got interface: {} (ver {})", INTERFACE, version);
 
-    if (INTERFACE == zwlr_screencopy_manager_v1_interface.name)
+    if (INTERFACE == zwlr_screencopy_manager_v1_interface.name && m_sPipewire.loop)
         m_sPortals.screencopy = std::make_unique<CScreencopyPortal>((zwlr_screencopy_manager_v1*)wl_registry_bind(registry, name, &zwlr_screencopy_manager_v1_interface, version));
 }
 
@@ -58,10 +60,19 @@ void CPortalManager::init() {
     wl_registry* registry = wl_display_get_registry(m_sWaylandConnection.display);
     wl_registry_add_listener(registry, &registryListener, nullptr);
 
+    pw_init(nullptr, nullptr);
+    m_sPipewire.loop = pw_loop_new(nullptr);
+
+    if (!m_sPipewire.loop)
+        Debug::log(ERR, "Pipewire: refused to create a loop. Screensharing will not work.");
+
     Debug::log(LOG, "Gathering exported interfaces");
 
     wl_display_roundtrip(m_sWaylandConnection.display);
 
+    if (!m_sPortals.screencopy)
+        Debug::log(WARN, "Screencopy not started: compositor doesn't support zwlr_screencopy_v1 or pw refused a loop");
+
     while (1) {
         // dbus events
         while (m_pConnection->processPendingRequest()) {
@@ -77,6 +88,8 @@ void CPortalManager::init() {
                 break;
         }
 
+        // TODO: pipewire loop
+
         std::this_thread::sleep_for(std::chrono::milliseconds(1));
     }
 }

src/core/PortalManager.hpp

@@ -6,6 +6,8 @@
 
 #include "../portals/Screencopy.hpp"
 
+struct pw_loop;
+
 class CPortalManager {
   public:
     void                init();
@@ -14,6 +16,10 @@ class CPortalManager {
 
     sdbus::IConnection* getConnection();
 
+    struct {
+        pw_loop* loop = nullptr;
+    } m_sPipewire;
+
   private:
     std::unique_ptr<sdbus::IConnection> m_pConnection;
 

src/portals/Screencopy.cpp

@@ -3,6 +3,8 @@
 #include "../helpers/Log.hpp"
 #include "../helpers/MiscFunctions.hpp"
 
+#include <pipewire/pipewire.h>
+
 void onCloseRequest(sdbus::MethodCall& call, CScreencopyPortal::SSession* sess) {
     if (!sess || !sess->request)
         return;
@@ -197,6 +199,7 @@ void CScreencopyPortal::onStart(sdbus::MethodCall& call) {
         case TYPE_WINDOW: type = 1 << WINDOW; break;
         case TYPE_GEOMETRY:
         case TYPE_WORKSPACE: type = 1 << VIRTUAL; break;
+        default: type = 0; break;
     }
     options["source_type"] = type;
 
@@ -226,5 +229,37 @@ CScreencopyPortal::CScreencopyPortal(zwlr_screencopy_manager_v1* mgr) {
 
     m_pObject->finishRegistration();
 
+    m_sState.screencopy = mgr;
+    m_pPipewire         = std::make_unique<CPipewireConnection>();
+
     Debug::log(LOG, "[screencopy] init successful");
 }
+
+bool CPipewireConnection::good() {
+    return m_pContext && m_pCore;
+}
+
+CPipewireConnection::CPipewireConnection() {
+    m_pContext = pw_context_new(g_pPortalManager->m_sPipewire.loop, nullptr, 0);
+
+    if (!m_pContext) {
+        Debug::log(ERR, "[pipewire] pw didn't allow for a context");
+        return;
+    }
+
+    m_pCore = pw_context_connect(m_pContext, nullptr, 0);
+
+    if (!m_pCore) {
+        Debug::log(ERR, "[pipewire] pw didn't allow for a context connection");
+        return;
+    }
+
+    Debug::log(LOG, "[pipewire] connected");
+}
+
+CPipewireConnection::~CPipewireConnection() {
+    if (m_pCore)
+        pw_core_disconnect(m_pCore);
+    if (m_pContext)
+        pw_context_destroy(m_pContext);
+}

src/portals/Screencopy.hpp

@@ -18,6 +18,21 @@ enum sourceTypes
     VIRTUAL = 4,
 };
 
+struct pw_context;
+struct pw_core;
+
+class CPipewireConnection {
+  public:
+    CPipewireConnection();
+    ~CPipewireConnection();
+
+    bool good();
+
+  private:
+    pw_context* m_pContext = nullptr;
+    pw_core*    m_pCore    = nullptr;
+};
+
 class CScreencopyPortal {
   public:
     CScreencopyPortal(zwlr_screencopy_manager_v1*);
@@ -46,6 +61,12 @@ class CScreencopyPortal {
 
     SSession*                              getSession(sdbus::ObjectPath& path);
 
-    const std::string                      INTERFACE_NAME = "org.freedesktop.impl.portal.ScreenCast";
+    std::unique_ptr<CPipewireConnection>   m_pPipewire;
-    const std::string                      OBJECT_PATH    = "/org/freedesktop/portal/desktop";
+
+    struct {
+        zwlr_screencopy_manager_v1* screencopy = nullptr;
+    } m_sState;
+
+    const std::string INTERFACE_NAME = "org.freedesktop.impl.portal.ScreenCast";
+    const std::string OBJECT_PATH    = "/org/freedesktop/portal/desktop";
 };