/* 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 #include #include "GStreamerLoader.h" #define LIBGSTREAMER 0 #define LIBGSTAPP 1 #define LIBGSTVIDEO 2 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); 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, µ, &nano); } if (major == GST_VERSION_MAJOR && minor == GST_VERSION_MINOR) { gstreamerLib = RTLD_DEFAULT; } else { gstreamerLib = dlopen("libgstreamer-0.10.so.0", RTLD_NOW | RTLD_LOCAL); } void *handles[] = { gstreamerLib, dlopen("libgstapp-0.10.so.0", RTLD_NOW | RTLD_LOCAL), dlopen("libgstvideo-0.10.so.0", RTLD_NOW | RTLD_LOCAL) }; for (size_t i = 0; i < sizeof(handles) / sizeof(handles[0]); i++) { if (!handles[i]) { goto fail; } } #define GST_FUNC(lib, symbol) \ if (!(symbol = (typeof(symbol))dlsym(handles[lib], #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)); } }