/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.cpp
https://bitbucket.org/lindenlab/viewer-beta/ · C++ · 167 lines · 106 code · 28 blank · 33 comment · 14 complexity · f69b504fa1a79e14f1e9b5a4fc8a5c95 MD5 · raw file
- /**
- * @file llmediaimplgstreamer_syms.cpp
- * @brief dynamic GStreamer symbol-grabbing code
- *
- * @cond
- * $LicenseInfo:firstyear=2007&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License only.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
- * $/LicenseInfo$
- * @endcond
- */
- #if LL_GSTREAMER010_ENABLED
- #include <string>
- extern "C" {
- #include <gst/gst.h>
- #include "apr_pools.h"
- #include "apr_dso.h"
- }
- #include "llmediaimplgstreamertriviallogging.h"
- #define LL_GST_SYM(REQ, GSTSYM, RTN, ...) RTN (*ll##GSTSYM)(__VA_ARGS__) = NULL
- #include "llmediaimplgstreamer_syms_raw.inc"
- #include "llmediaimplgstreamer_syms_rawv.inc"
- #undef LL_GST_SYM
- // a couple of stubs for disgusting reasons
- GstDebugCategory*
- ll_gst_debug_category_new(gchar *name, guint color, gchar *description)
- {
- static GstDebugCategory dummy;
- return &dummy;
- }
- void ll_gst_debug_register_funcptr(GstDebugFuncPtr func, gchar* ptrname)
- {
- }
- static bool sSymsGrabbed = false;
- static apr_pool_t *sSymGSTDSOMemoryPool = NULL;
- static apr_dso_handle_t *sSymGSTDSOHandleG = NULL;
- static apr_dso_handle_t *sSymGSTDSOHandleV = NULL;
- bool grab_gst_syms(std::string gst_dso_name,
- std::string gst_dso_name_vid)
- {
- if (sSymsGrabbed)
- {
- // already have grabbed good syms
- return TRUE;
- }
- bool sym_error = false;
- bool rtn = false;
- apr_status_t rv;
- apr_dso_handle_t *sSymGSTDSOHandle = NULL;
- #define LL_GST_SYM(REQ, GSTSYM, RTN, ...) do{rv = apr_dso_sym((apr_dso_handle_sym_t*)&ll##GSTSYM, sSymGSTDSOHandle, #GSTSYM); if (rv != APR_SUCCESS) {INFOMSG("Failed to grab symbol: %s", #GSTSYM); if (REQ) sym_error = true;} else DEBUGMSG("grabbed symbol: %s from %p", #GSTSYM, (void*)ll##GSTSYM);}while(0)
- //attempt to load the shared libraries
- apr_pool_create(&sSymGSTDSOMemoryPool, NULL);
-
- if ( APR_SUCCESS == (rv = apr_dso_load(&sSymGSTDSOHandle,
- gst_dso_name.c_str(),
- sSymGSTDSOMemoryPool) ))
- {
- INFOMSG("Found DSO: %s", gst_dso_name.c_str());
- #include "llmediaimplgstreamer_syms_raw.inc"
-
- if ( sSymGSTDSOHandle )
- {
- sSymGSTDSOHandleG = sSymGSTDSOHandle;
- sSymGSTDSOHandle = NULL;
- }
-
- if ( APR_SUCCESS ==
- (rv = apr_dso_load(&sSymGSTDSOHandle,
- gst_dso_name_vid.c_str(),
- sSymGSTDSOMemoryPool) ))
- {
- INFOMSG("Found DSO: %s", gst_dso_name_vid.c_str());
- #include "llmediaimplgstreamer_syms_rawv.inc"
- rtn = !sym_error;
- }
- else
- {
- INFOMSG("Couldn't load DSO: %s", gst_dso_name_vid.c_str());
- rtn = false; // failure
- }
- }
- else
- {
- INFOMSG("Couldn't load DSO: %s", gst_dso_name.c_str());
- rtn = false; // failure
- }
- if (sym_error)
- {
- WARNMSG("Failed to find necessary symbols in GStreamer libraries.");
- }
-
- if ( sSymGSTDSOHandle )
- {
- sSymGSTDSOHandleV = sSymGSTDSOHandle;
- sSymGSTDSOHandle = NULL;
- }
- #undef LL_GST_SYM
- sSymsGrabbed = !!rtn;
- return rtn;
- }
- void ungrab_gst_syms()
- {
- // should be safe to call regardless of whether we've
- // actually grabbed syms.
- if ( sSymGSTDSOHandleG )
- {
- apr_dso_unload(sSymGSTDSOHandleG);
- sSymGSTDSOHandleG = NULL;
- }
-
- if ( sSymGSTDSOHandleV )
- {
- apr_dso_unload(sSymGSTDSOHandleV);
- sSymGSTDSOHandleV = NULL;
- }
-
- if ( sSymGSTDSOMemoryPool )
- {
- apr_pool_destroy(sSymGSTDSOMemoryPool);
- sSymGSTDSOMemoryPool = NULL;
- }
-
- // NULL-out all of the symbols we'd grabbed
- #define LL_GST_SYM(REQ, GSTSYM, RTN, ...) do{ll##GSTSYM = NULL;}while(0)
- #include "llmediaimplgstreamer_syms_raw.inc"
- #include "llmediaimplgstreamer_syms_rawv.inc"
- #undef LL_GST_SYM
- sSymsGrabbed = false;
- }
- #endif // LL_GSTREAMER010_ENABLED