Properly initialize GStreamer on iOS

src/VideoStreaming/VideoStreaming.cc

@@ -22,6 +22,9 @@
 #ifdef __android__
 //#define ANDDROID_GST_DEBUG
 #endif
+#if defined(__ios__)
+#include "gst_ios_init.h"
+#endif
 #endif
 
 #include "VideoStreaming.h"
@@ -120,8 +123,12 @@ void initializeVideoStreaming(int &argc, char* argv[], char* logpath, char* debu
         qgcputenv("GST_PLUGIN_PATH", currentDir, "/gstreamer-plugins");
     #endif
 
-        // Initialize GStreamer
-#if !defined(__ios__)
+    // Initialize GStreamer
+    #if defined(__ios__)
+        //-- iOS specific initialization
+        gst_ios_init();
+    #else
+        //-- Generic initialization
         if (logpath) {
             if (debuglevel) {
                 qputenv("GST_DEBUG", debuglevel);
@@ -130,16 +137,16 @@ void initializeVideoStreaming(int &argc, char* argv[], char* logpath, char* debu
             qputenv("GST_DEBUG_FILE", QString("%1/%2").arg(logpath).arg("gstreamer-log.txt").toUtf8());
             qputenv("GST_DEBUG_DUMP_DOT_DIR", logpath);
         }
-#endif
         GError* error = nullptr;
         if (!gst_init_check(&argc, &argv, &error)) {
             qCritical() << "gst_init_check() failed: " << error->message;
             g_error_free(error);
         }
+    #endif
         // Our own plugin
         GST_PLUGIN_STATIC_REGISTER(QGC_VIDEOSINK_PLUGIN);
         // The static plugins we use
-    #if defined(__mobile__) && !defined(Q_OS_MAC)
+    #if defined(__android__)
         GST_PLUGIN_STATIC_REGISTER(coreelements);
         GST_PLUGIN_STATIC_REGISTER(libav);
         GST_PLUGIN_STATIC_REGISTER(rtp);

src/VideoStreaming/VideoStreaming.pri

@@ -178,6 +178,13 @@ VideoEnabled {
         $$PWD/gstqtvideosink/utils/bufferformat.cpp \
         $$PWD/gstqtvideosink/utils/utils.cpp \
 
+    iOSBuild {
+        OBJECTIVE_SOURCES += \
+            $$PWD/ios/gst_ios_init.m
+        INCLUDEPATH += \
+            $$PWD/ios
+    }
+
 } else {
     LinuxBuild|MacBuild|iOSBuild|WindowsBuild|AndroidBuild {
         message("Skipping support for video streaming (GStreamer libraries not installed)")

src/VideoStreaming/gstqtvideosink/utils/glutils.h

@@ -16,7 +16,7 @@
 
 #pragma once
 
-#if defined(__mobile__) && !defined(Q_OS_MAC)
+#if defined(__andoid__) || defined(__ios__)
 #include <QOpenGLFunctions>
 #define getQOpenGLFunctions() QOpenGLContext::currentContext()->functions()
 #define QOpenGLFunctionsDef QOpenGLFunctions

src/VideoStreaming/iOS/gst_ios_init.h

+#ifndef __GST_IOS_INIT_H__
+#define __GST_IOS_INIT_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_G_IO_MODULE_DECLARE(name) \
+extern void G_PASTE(g_io_module_, G_PASTE(name, _load_static)) (void)
+
+#define GST_G_IO_MODULE_LOAD(name) \
+G_PASTE(g_io_module_, G_PASTE(name, _load_static)) ()
+
+/* Uncomment each line to enable the plugin categories that your application needs.
+ * You can also enable individual plugins. See gst_ios_init.c to see their names
+ */
+
+//#define GST_IOS_PLUGINS_GES
+#define GST_IOS_PLUGINS_CORE
+//#define GST_IOS_PLUGINS_CAPTURE
+//#define GST_IOS_PLUGINS_CODECS_RESTRICTED
+//#define GST_IOS_PLUGINS_ENCODING
+//#define GST_IOS_PLUGINS_CODECS_GPL
+//#define GST_IOS_PLUGINS_NET_RESTRICTED
+//#define GST_IOS_PLUGINS_SYS
+//#define GST_IOS_PLUGINS_VIS
+//#define GST_IOS_PLUGINS_PLAYBACK
+//#define GST_IOS_PLUGINS_EFFECTS
+//#define GST_IOS_PLUGINS_CODECS
+#define GST_IOS_PLUGINS_NET
+
+//-- Specific to QGC
+#define GST_IOS_PLUGIN_X264
+#define GST_IOS_PLUGIN_LIBAV
+#define GST_IOS_PLUGIN_ISOMP4
+#define GST_IOS_PLUGIN_VIDEOPARSERSBAD
+#define GST_IOS_PLUGIN_MATROSKA
+
+//#define GST_IOS_GIO_MODULE_GNUTLS
+
+void gst_ios_init (void);
+
+G_END_DECLS
+
+#endif