1 files changed, 78 insertions, 0 deletions
diff --git a/pw1.patch b/pw1.patch
new file mode 100644
index 0000000..1f88545
--- /dev/null
+++ b/pw1.patch
@@ -0,0 +1,78 @@
+
+# HG changeset patch
+# User stransky <stransky@redhat.com>
+# Date 1604562416 0
+# Node ID 1c126b520042591194e88618ae11a6adc1da9a08
+# Parent  6e2e4f0e4a95b0cae777dda9369a9e9bf49a51b1
+Bug 1672987 Use PipeWire when Wayland display is actually used, r=dminor
+
+Right now PipeWire is enabled when Wayland session is used regardless of an active Gtk backend (X11/Wayland).
+Let's use PipeWire only when Wayland Gtk backend is used and disable it for X11 one to avoid possible regressions.
+
+Differential Revision: https://phabricator.services.mozilla.com/D94588
+
+diff --git a/third_party/libwebrtc/webrtc/modules/desktop_capture/desktop_capturer.cc b/third_party/libwebrtc/webrtc/modules/desktop_capture/desktop_capturer.cc
+--- a/third_party/libwebrtc/webrtc/modules/desktop_capture/desktop_capturer.cc
++++ b/third_party/libwebrtc/webrtc/modules/desktop_capture/desktop_capturer.cc
+@@ -8,16 +8,21 @@
+  *  be found in the AUTHORS file in the root of the source tree.
+  */
+ 
+ #include "modules/desktop_capture/desktop_capturer.h"
+ 
+ #include "modules/desktop_capture/desktop_capture_options.h"
+ #include "modules/desktop_capture/desktop_capturer_differ_wrapper.h"
+ 
++#if defined(WEBRTC_USE_PIPEWIRE) || defined(USE_X11)
++#include <gtk/gtk.h>
++#include <gtk/gtkx.h>
++#endif
++
+ namespace webrtc {
+ 
+ DesktopCapturer::~DesktopCapturer() = default;
+ 
+ void DesktopCapturer::SetSharedMemoryFactory(
+     std::unique_ptr<SharedMemoryFactory> shared_memory_factory) {}
+ 
+ void DesktopCapturer::SetExcludedWindow(WindowId window) {}
+@@ -67,21 +72,37 @@ std::unique_ptr<DesktopCapturer> Desktop
+   if (capturer && options.detect_updated_region()) {
+     capturer.reset(new DesktopCapturerDifferWrapper(std::move(capturer)));
+   }
+ 
+   return capturer;
+ }
+ 
+ #if defined(WEBRTC_USE_PIPEWIRE) || defined(USE_X11)
+-bool DesktopCapturer::IsRunningUnderWayland() {
++// Return true if Firefox is actually running with Wayland backend.
++static bool IsWaylandDisplayUsed() {
++  const auto display = gdk_display_get_default();
++  if (display == nullptr) {
++    // We're running in headless mode.
++    return false;
++  }
++  return !GDK_IS_X11_DISPLAY(display);
++}
++
++// Return true if Firefox is actually running on Wayland enabled session.
++// It means some screensharing capabilities may be limited.
++static bool IsWaylandSessionUsed() {
+   const char* xdg_session_type = getenv("XDG_SESSION_TYPE");
+   if (!xdg_session_type || strncmp(xdg_session_type, "wayland", 7) != 0)
+     return false;
+ 
+   if (!(getenv("WAYLAND_DISPLAY")))
+     return false;
+ 
+   return true;
+ }
++
++bool DesktopCapturer::IsRunningUnderWayland() {
++  return IsWaylandSessionUsed() ? IsWaylandDisplayUsed() : false;
++}
+ #endif  // defined(WEBRTC_USE_PIPEWIRE) || defined(USE_X11)
+ 
+ }  // namespace webrtc
+