diff options
Diffstat (limited to 'indra/media_plugins/gstreamer10/llmediaimplgstreamer_syms.cpp')
| -rw-r--r-- | indra/media_plugins/gstreamer10/llmediaimplgstreamer_syms.cpp | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/indra/media_plugins/gstreamer10/llmediaimplgstreamer_syms.cpp b/indra/media_plugins/gstreamer10/llmediaimplgstreamer_syms.cpp new file mode 100644 index 0000000000..e5e5c1c9a3 --- /dev/null +++ b/indra/media_plugins/gstreamer10/llmediaimplgstreamer_syms.cpp @@ -0,0 +1,197 @@ +/** + * @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 + */ + +#include <string> +#include <iostream> +#include <vector> + +#ifdef LL_WINDOWS +#undef _WIN32_WINNT +#define _WIN32_WINNT 0x0502 +#include <Windows.h> +#endif + +#include "linden_common.h" + +extern "C" { +#include <gst/gst.h> +#include <gst/app/gstappsink.h> +} + +#include "apr_pools.h" +#include "apr_dso.h" + +#ifdef LL_WINDOWS + +#ifndef _M_AMD64 +#define GSTREAMER_REG_KEY "Software\\GStreamer1.0\\x86" +#define GSTREAMER_DIR_SUFFIX "1.0\\x86\\bin\\" +#else +#define GSTREAMER_REG_KEY "Software\\GStreamer1.0\\x86_64" +#define GSTREAMER_DIR_SUFFIX "1.0\\x86_64\\bin\\" +#endif + +bool openRegKey( HKEY &aKey ) +{ + // Try native (32 bit view/64 bit view) of registry first. + if( ERROR_SUCCESS == ::RegOpenKeyExA( HKEY_LOCAL_MACHINE, GSTREAMER_REG_KEY, 0, KEY_QUERY_VALUE, &aKey ) ) + return true; + + // If native view fails, use 32 bit view or registry. + if( ERROR_SUCCESS == ::RegOpenKeyExA( HKEY_LOCAL_MACHINE, GSTREAMER_REG_KEY, 0, KEY_QUERY_VALUE | KEY_WOW64_32KEY, &aKey ) ) + return true; + + return false; +} + +std::string getGStreamerDir() +{ + std::string ret; + HKEY hKey; + + if( openRegKey( hKey ) ) + { + DWORD dwLen(0); + ::RegQueryValueExA( hKey, "InstallDir", nullptr, nullptr, nullptr, &dwLen ); + + if( dwLen > 0 ) + { + std::vector< char > vctBuffer; + vctBuffer.resize( dwLen ); + ::RegQueryValueExA( hKey, "InstallDir", nullptr, nullptr, reinterpret_cast< LPBYTE>(&vctBuffer[ 0 ]), &dwLen ); + ret = &vctBuffer[0]; + + if( ret[ dwLen-1 ] != '\\' ) + ret += "\\"; + ret += GSTREAMER_DIR_SUFFIX; + + SetDllDirectoryA( ret.c_str() ); + } + ::RegCloseKey( hKey ); + } + return ret; +} +#else +std::string getGStreamerDir() { return ""; } +#endif + +#define LL_GST_SYM(REQ, GSTSYM, RTN, ...) RTN (*ll##GSTSYM)(__VA_ARGS__) = NULL; +#include "llmediaimplgstreamer_syms_raw.inc" +#undef LL_GST_SYM + +struct Symloader +{ + bool mRequired; + char const *mName; + apr_dso_handle_sym_t *mPPFunc; +}; + +#define LL_GST_SYM(REQ, GSTSYM, RTN, ...) { REQ, #GSTSYM , (apr_dso_handle_sym_t*)&ll##GSTSYM}, +Symloader sSyms[] = { +#include "llmediaimplgstreamer_syms_raw.inc" +{ false, 0, 0 } }; +#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; + +std::vector< apr_dso_handle_t* > sLoadedLibraries; + +bool grab_gst_syms( std::vector< std::string > const &aDSONames ) +{ + if (sSymsGrabbed) + return true; + + //attempt to load the shared libraries + apr_pool_create(&sSymGSTDSOMemoryPool, NULL); + + for( std::vector< std::string >::const_iterator itr = aDSONames.begin(); itr != aDSONames.end(); ++itr ) + { + apr_dso_handle_t *pDSO(NULL); + std::string strDSO = getGStreamerDir() + *itr; + if( APR_SUCCESS == apr_dso_load( &pDSO, strDSO.c_str(), sSymGSTDSOMemoryPool )) + sLoadedLibraries.push_back( pDSO ); + + for( int i = 0; sSyms[ i ].mName; ++i ) + { + if( !*sSyms[ i ].mPPFunc ) + { + apr_dso_sym( sSyms[ i ].mPPFunc, pDSO, sSyms[ i ].mName ); + } + } + } + + std::stringstream strm; + bool sym_error = false; + for( int i = 0; sSyms[ i ].mName; ++i ) + { + if( sSyms[ i ].mRequired && ! *sSyms[ i ].mPPFunc ) + { + sym_error = true; + strm << sSyms[ i ].mName << std::endl; + } + } + + sSymsGrabbed = !sym_error; + return sSymsGrabbed; +} + + +void ungrab_gst_syms() +{ + // should be safe to call regardless of whether we've + // actually grabbed syms. + + for( std::vector< apr_dso_handle_t* >::iterator itr = sLoadedLibraries.begin(); itr != sLoadedLibraries.end(); ++itr ) + apr_dso_unload( *itr ); + + sLoadedLibraries.clear(); + + if ( sSymGSTDSOMemoryPool ) + { + apr_pool_destroy(sSymGSTDSOMemoryPool); + sSymGSTDSOMemoryPool = NULL; + } + + for( int i = 0; sSyms[ i ].mName; ++i ) + *sSyms[ i ].mPPFunc = NULL; + + sSymsGrabbed = false; +} + |