diff options
Diffstat (limited to 'indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.cpp')
| -rw-r--r-- | indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.cpp | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.cpp b/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.cpp new file mode 100644 index 0000000000..2e4baaa9eb --- /dev/null +++ b/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.cpp @@ -0,0 +1,167 @@ +/** + * @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 |