diff -r 000000000000 -r 6474c204b198 content/media/gstreamer/GStreamerLoader.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/gstreamer/GStreamerLoader.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,146 @@
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <dlfcn.h>
+#include <stdio.h>
+
+#include "nsDebug.h"
+#include "mozilla/NullPtr.h"
+
+#include "GStreamerLoader.h"
+
+#define LIBGSTREAMER 0
+#define LIBGSTAPP 1
+#define LIBGSTVIDEO 2
+
+#ifdef __OpenBSD__
+#define LIB_GST_SUFFIX ".so"
+#else
+#define LIB_GST_SUFFIX ".so.0"
+#endif
+
+namespace mozilla {
+
+/*
+ * Declare our function pointers using the types from the global gstreamer
+ * definitions.
+ */
+#define GST_FUNC(_, func) typeof(::func)* func;
+#define REPLACE_FUNC(func) GST_FUNC(-1, func)
+#include "GStreamerFunctionList.h"
+#undef GST_FUNC
+#undef REPLACE_FUNC
+
+/*
+ * Redefinitions of functions that have been defined in the gstreamer headers to
+ * stop them calling the gstreamer functions in global scope.
+ */
+GstBuffer * gst_buffer_ref_impl(GstBuffer *buf);
+void gst_buffer_unref_impl(GstBuffer *buf);
+void gst_message_unref_impl(GstMessage *msg);
+void gst_caps_unref_impl(GstCaps *caps);
+
+#if GST_VERSION_MAJOR == 1
+void gst_sample_unref_impl(GstSample *sample);
+#endif
+
+bool
+load_gstreamer()
+{
+#ifdef __APPLE__
+  return true;
+#endif
+  static bool loaded = false;
+
+  if (loaded) {
+    return true;
+  }
+
+  void *gstreamerLib = nullptr;
+  guint major = 0;
+  guint minor = 0;
+  guint micro, nano;
+
+  typedef typeof(::gst_version) VersionFuncType;
+  if (VersionFuncType *versionFunc = (VersionFuncType*)dlsym(RTLD_DEFAULT, "gst_version")) {
+    versionFunc(&major, &minor, &micro, &nano);
+  }
+
+  if (major == GST_VERSION_MAJOR && minor == GST_VERSION_MINOR) {
+    gstreamerLib = RTLD_DEFAULT;
+  } else {
+    gstreamerLib = dlopen("libgstreamer-" GST_API_VERSION LIB_GST_SUFFIX, RTLD_NOW | RTLD_LOCAL);
+  }
+
+  void *handles[3] = {
+    gstreamerLib,
+    dlopen("libgstapp-" GST_API_VERSION LIB_GST_SUFFIX, RTLD_NOW | RTLD_LOCAL),
+    dlopen("libgstvideo-" GST_API_VERSION LIB_GST_SUFFIX, RTLD_NOW | RTLD_LOCAL)
+  };
+
+  for (size_t i = 0; i < sizeof(handles) / sizeof(handles[0]); i++) {
+    if (!handles[i]) {
+      NS_WARNING("Couldn't link gstreamer libraries");
+      goto fail;
+    }
+  }
+
+#define GST_FUNC(lib, symbol) \
+  if (!(symbol = (typeof(symbol))dlsym(handles[lib], #symbol))) { \
+    NS_WARNING("Couldn't link symbol " #symbol); \
+    goto fail; \
+  }
+#define REPLACE_FUNC(symbol) symbol = symbol##_impl;
+#include "GStreamerFunctionList.h"
+#undef GST_FUNC
+#undef REPLACE_FUNC
+
+  loaded = true;
+  return true;
+
+fail:
+
+  for (size_t i = 0; i < sizeof(handles) / sizeof(handles[0]); i++) {
+    if (handles[i] && handles[i] != RTLD_DEFAULT) {
+      dlclose(handles[i]);
+    }
+  }
+
+  return false;
+}
+
+GstBuffer *
+gst_buffer_ref_impl(GstBuffer *buf)
+{
+  return (GstBuffer *)gst_mini_object_ref(GST_MINI_OBJECT_CAST(buf));
+}
+
+void
+gst_buffer_unref_impl(GstBuffer *buf)
+{
+  gst_mini_object_unref(GST_MINI_OBJECT_CAST(buf));
+}
+
+void
+gst_message_unref_impl(GstMessage *msg)
+{
+  gst_mini_object_unref(GST_MINI_OBJECT_CAST(msg));
+}
+
+#if GST_VERSION_MAJOR == 1
+void
+gst_sample_unref_impl(GstSample *sample)
+{
+  gst_mini_object_unref(GST_MINI_OBJECT_CAST(sample));
+}
+#endif
+
+void
+gst_caps_unref_impl(GstCaps *caps)
+{
+  gst_mini_object_unref(GST_MINI_OBJECT_CAST(caps));
+}
+
+}