From 9033235e9da36bfdb10a83f96c713190f0505ca8 Mon Sep 17 00:00:00 2001
From: Joe Donofry <rubberduckie3554@gmail.com>
Date: Sun, 2 Jan 2022 21:15:10 +0000
Subject: Gstreamer glib event loop for macos and windows

- This ensures that gstreamer bus operations work
on macOS and windows, such as enumerating devices.
---
 src/main.cpp | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'src/main.cpp')

diff --git a/src/main.cpp b/src/main.cpp
index 4ecc18d2..2ae631cf 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -34,6 +34,11 @@
 #include "emoji/MacHelper.h"
 #endif
 
+#if defined(GSTREAMER_AVAILABLE) && (defined(Q_OS_MAC) || defined(Q_OS_WINDOWS))
+#include <QAbstractEventDispatcher>
+#include <gst/gst.h>
+#endif
+
 #ifdef QML_DEBUGGING
 #include <QQmlDebuggingEnabler>
 QQmlDebuggingEnabler enabler;
@@ -100,6 +105,23 @@ registerSignalHandlers()
 
 #endif
 
+#if defined(GSTREAMER_AVAILABLE) && (defined(Q_OS_MAC) || defined(Q_OS_WINDOWS))
+GMainLoop *gloop = 0;
+GThread *gthread = 0;
+
+extern "C"
+{
+    static gpointer glibMainLoopThreadFunc(gpointer)
+    {
+        gloop = g_main_loop_new(0, false);
+        g_main_loop_run(gloop);
+        g_main_loop_unref(gloop);
+        gloop = 0;
+        return 0;
+    }
+} // extern "C"
+#endif
+
 QPoint
 screenCenter(int width, int height)
 {
@@ -220,6 +242,16 @@ main(int argc, char *argv[])
 
     registerSignalHandlers();
 
+#if defined(GSTREAMER_AVAILABLE) && (defined(Q_OS_MAC) || defined(Q_OS_WINDOWS))
+    // If the version of Qt we're running in does not use GLib, we need to
+    // start a GMainLoop so that gstreamer can dispatch events.
+    const QMetaObject *mo = QAbstractEventDispatcher::instance(qApp->thread())->metaObject();
+    if (gloop == 0 && strcmp(mo->className(), "QEventDispatcherGlib") != 0 &&
+        strcmp(mo->superClass()->className(), "QEventDispatcherGlib") != 0) {
+        gthread = g_thread_new(0, glibMainLoopThreadFunc, 0);
+    }
+#endif
+
     if (parser.isSet(debugOption))
         nhlog::enable_debug_log_from_commandline = true;
 
-- 
cgit 1.5.1