Second Life viewer sources 1.18.1.2

1 files changed, 189 insertions, 0 deletions

diff --git a/linden/indra/llmedia/llmediaimplgstreamer_syms.cpp b/linden/indra/llmedia/llmediaimplgstreamer_syms.cpp
new file mode 100644
index 0000000..76f62e1
--- /dev/null
+++ b/linden/indra/llmedia/llmediaimplgstreamer_syms.cpp
@@ -0,0 +1,189 @@
+/** 
+ * @file llmediaimplgstreamer_syms.cpp
+ * @brief dynamic GStreamer symbol-grabbing code
+ *
+ * Copyright (c) 2007-2007, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#include "linden_common.h"
+
+#if LL_GSTREAMER_ENABLED
+
+extern "C" {
+#include <gst/gst.h>
+
+#include <apr-1/apr_pools.h>
+#include <apr-1/apr_dso.h>
+}
+
+#include "llmediaimplgstreamer.h"
+
+#define LL_GST_SYM(REQ, GSTSYM, RTN, ...) RTN (*ll##GSTSYM)(__VA_ARGS__) = NULL
+#include "llmediaimplgstreamer_syms_raw.inc"
+#include "llmediaimplgstreamer_syms_rawa.inc"
+#include "llmediaimplgstreamer_syms_rawv.inc"
+#undef LL_GST_SYM
+
+
+static bool sSymsGrabbed = false;
+static apr_pool_t *sSymGSTDSOMemoryPool = NULL;
+static apr_dso_handle_t *sSymGSTDSOHandleG = NULL;
+static apr_dso_handle_t *sSymGSTDSOHandleV = NULL;
+static apr_dso_handle_t *sSymGSTDSOHandleA = NULL;
+
+
+bool grab_gst_syms(std::string gst_dso_name,
+                   std::string gst_dso_name_vid,
+                   std::string gst_dso_name_aud)
+{
+        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) {llwarns << "Failed to grab symbol: " << #GSTSYM << llendl; if (REQ) sym_error = true;} else llinfos << "grabbed symbol: " << #GSTSYM << " from " << (void*)ll##GSTSYM << llendl;}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) ))
+        {
+                llinfos << "Found DSO: " << gst_dso_name << llendl;
+#include "llmediaimplgstreamer_syms_raw.inc"
+      
+                if ( sSymGSTDSOHandle )
+                {
+                        sSymGSTDSOHandleG = sSymGSTDSOHandle;
+                        sSymGSTDSOHandle = NULL;
+                }
+      
+                if ( APR_SUCCESS == (rv = apr_dso_load(&sSymGSTDSOHandle,
+                                                    gst_dso_name_aud.c_str(),
+                                                       sSymGSTDSOMemoryPool) ))
+                {
+                        llinfos << "Found DSO: " << gst_dso_name_aud << llendl;
+#include "llmediaimplgstreamer_syms_rawa.inc"
+                        
+                        if ( sSymGSTDSOHandle )
+                        {
+                                sSymGSTDSOHandleA = sSymGSTDSOHandle;
+                                sSymGSTDSOHandle = NULL;
+                        }
+          
+                        if ( APR_SUCCESS ==
+                             (rv = apr_dso_load(&sSymGSTDSOHandle,
+                                                gst_dso_name_vid.c_str(),
+                                                sSymGSTDSOMemoryPool) ))
+                        {
+                                llinfos << "Found DSO: " << gst_dso_name_vid << llendl;
+#include "llmediaimplgstreamer_syms_rawv.inc"
+                        }
+                        else
+                        {
+                                llwarns << "Couldn't load DSO: "
+                                        << gst_dso_name_vid << llendl;
+                                rtn = false; // failure
+                        }
+                }
+                else
+                {
+                        llwarns << "Couldn't load DSO: "
+                                << gst_dso_name_aud << llendl;
+                        rtn = false; // failure
+                }
+                
+                rtn = !sym_error;
+        }
+        else
+        {
+                llwarns << "Couldn't load DSO: " << gst_dso_name << llendl;
+                rtn = false; // failure
+        }
+
+        if (sym_error)
+        {
+                llwarns << "Failed to find necessary symbols in GStreamer libraries." << llendl;
+        }
+        
+        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 ( sSymGSTDSOHandleA )
+        {
+                apr_dso_unload(sSymGSTDSOHandleA);
+                sSymGSTDSOHandleA = 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_rawa.inc"
+#include "llmediaimplgstreamer_syms_rawv.inc"
+#undef LL_GST_SYM
+
+        sSymsGrabbed = false;
+}
+
+
+#endif // LL_GSTREAMER_ENABLED