Merge pull request #940 from secondlife/release/maint-b

Maintenance B merges into develop

31 files changed, 2235 insertions, 2384 deletions

diff --git a/indra/media_plugins/CMakeLists.txt b/indra/media_plugins/CMakeLists.txt
index 972bb7dd2d..86c46cb476 100644
--- a/indra/media_plugins/CMakeLists.txt
+++ b/indra/media_plugins/CMakeLists.txt
@@ -3,8 +3,9 @@
 add_subdirectory(base)
 
 if (LINUX)
-    #add_subdirectory(gstreamer010)
+    add_subdirectory(cef)
     add_subdirectory(example)
+    add_subdirectory(gstreamer10)
 endif (LINUX)
 
 if (DARWIN)
diff --git a/indra/media_plugins/base/CMakeLists.txt b/indra/media_plugins/base/CMakeLists.txt
index 64b6a4228d..5e635c6ca3 100644
--- a/indra/media_plugins/base/CMakeLists.txt
+++ b/indra/media_plugins/base/CMakeLists.txt
@@ -12,13 +12,6 @@ include(PluginAPI)
 
 ### media_plugin_base
 
-if(NOT ADDRESS_SIZE EQUAL 32)
-  if(WINDOWS)
-    ##add_definitions(/FIXED:NO)
-  else(WINDOWS) # not windows therefore gcc LINUX and DARWIN
-    add_definitions(-fPIC)
-  endif(WINDOWS)
-endif(NOT ADDRESS_SIZE EQUAL 32)
 
 set(media_plugin_base_SOURCE_FILES
     media_plugin_base.cpp
diff --git a/indra/media_plugins/base/media_plugin_base.cpp b/indra/media_plugins/base/media_plugin_base.cpp
index 545eee25a9..9bb3bad035 100644
--- a/indra/media_plugins/base/media_plugin_base.cpp
+++ b/indra/media_plugins/base/media_plugin_base.cpp
@@ -167,6 +167,56 @@ void MediaPluginBase::sendStatus()
     sendMessage(message);
 }
 
+#if LL_LINUX
+
+size_t SymbolGrabber::registerSymbol( SymbolToGrab aSymbol )
+{
+    gSymbolsToGrab.emplace_back(aSymbol);
+    return gSymbolsToGrab.size();
+}
+
+bool SymbolGrabber::grabSymbols(std::vector< std::string > const &aDSONames)
+{
+    std::cerr << "SYMBOLS: " << gSymbolsToGrab.size() << std::endl;
+
+    if (sSymsGrabbed)
+        return true;
+
+    //attempt to load the shared libraries
+    apr_pool_create(&sSymDSOMemoryPool, nullptr);
+
+    for( std::vector< std::string >::const_iterator itr = aDSONames.begin(); itr != aDSONames.end(); ++itr )
+    {
+        apr_dso_handle_t *pDSO(NULL);
+        std::string strDSO{ *itr };
+        if( APR_SUCCESS == apr_dso_load( &pDSO, strDSO.c_str(), sSymDSOMemoryPool ))
+            sLoadedLibraries.push_back( pDSO );
+
+        for( auto i = 0; i < gSymbolsToGrab.size(); ++i )
+        {
+            if( !*gSymbolsToGrab[i].mPPFunc )
+                apr_dso_sym( gSymbolsToGrab[i].mPPFunc, pDSO, gSymbolsToGrab[i].mName );
+        }
+    }
+
+    bool sym_error = false;
+
+    for( auto i = 0; i < gSymbolsToGrab.size(); ++i )
+    {
+        if( gSymbolsToGrab[ i ].mRequired && ! *gSymbolsToGrab[ i ].mPPFunc )
+            sym_error = true;
+    }
+
+    sSymsGrabbed = !sym_error;
+    return sSymsGrabbed;
+}
+
+void SymbolGrabber::ungrabSymbols()
+{
+
+}
+#endif
+
 
 #if LL_WINDOWS
 # define LLSYMEXPORT __declspec(dllexport)
@@ -204,3 +254,50 @@ int WINAPI DllEntryPoint( HINSTANCE hInstance, unsigned long reason, void* param
     return 1;
 }
 #endif
+
+#if LL_LINUX
+pid_t getParentPid( pid_t aPid )
+{
+    std::stringstream strm;
+    strm << "/proc/" << aPid << "/status";
+    std::ifstream in{ strm.str() };
+
+    if( !in.is_open() )
+        return 0;
+
+    pid_t res {0};
+    while( !in.eof() && res == 0 )
+    {
+        std::string line;
+        line.resize( 1024, 0 );
+        in.getline( &line[0], line.length() );
+
+        auto i = line.find( "PPid:"  );
+
+        if( i == std::string::npos )
+            continue;
+
+        char const *pIn = line.c_str() + 5; // Skip over pid;
+        while( *pIn != 0 && isspace( *pIn ) )
+               ++pIn;
+
+        if( *pIn )
+            res = atoll( pIn );
+    }
+     return res;
+}
+
+bool isPluginPid( pid_t aPid )
+{
+    auto myPid = getpid();
+
+    do
+    {
+        if( aPid == myPid )
+            return true;
+        aPid = getParentPid( aPid );
+    } while( aPid > 1 );
+
+    return false;
+}
+#endif
diff --git a/indra/media_plugins/base/media_plugin_base.h b/indra/media_plugins/base/media_plugin_base.h
index f65c712a66..a084fc9834 100644
--- a/indra/media_plugins/base/media_plugin_base.h
+++ b/indra/media_plugins/base/media_plugin_base.h
@@ -32,6 +32,41 @@
 #include "llpluginmessage.h"
 #include "llpluginmessageclasses.h"
 
+#if LL_LINUX
+
+struct SymbolToGrab
+{
+    bool mRequired;
+    char const *mName;
+    apr_dso_handle_sym_t *mPPFunc;
+};
+
+class SymbolGrabber
+{
+public:
+    size_t registerSymbol( SymbolToGrab aSymbol );
+    bool grabSymbols(std::vector< std::string > const &aDSONames);
+    void ungrabSymbols();
+
+private:
+    std::vector< SymbolToGrab > gSymbolsToGrab;
+
+    bool sSymsGrabbed = false;
+    apr_pool_t *sSymDSOMemoryPool = nullptr;
+    std::vector<apr_dso_handle_t *> sLoadedLibraries;
+};
+
+extern SymbolGrabber gSymbolGrabber;
+
+// extern SymbolGrabber gSymbolGrabber;
+
+#define LL_GRAB_SYM(SYMBOL_GRABBER, REQUIRED, SYMBOL_NAME, RETURN, ...) \
+    RETURN (*ll##SYMBOL_NAME)(__VA_ARGS__) = nullptr; \
+    size_t gRegistered##SYMBOL_NAME = SYMBOL_GRABBER.registerSymbol( \
+        { REQUIRED, #SYMBOL_NAME , (apr_dso_handle_sym_t*)&ll##SYMBOL_NAME} \
+    );
+
+#endif
 
 class MediaPluginBase
 {
@@ -46,7 +81,6 @@ public:
     static void staticReceiveMessage(const char *message_string, void **user_data);
 
 protected:
-
    /** Plugin status. */
     typedef enum
     {
@@ -126,4 +160,7 @@ int init_media_plugin(
     LLPluginInstance::sendMessageFunction *plugin_send_func,
     void **plugin_user_data);
 
-
+#if LL_LINUX
+pid_t getParentPid(pid_t aPid);
+bool isPluginPid(pid_t aPid);
+#endif
diff --git a/indra/media_plugins/cef/CMakeLists.txt b/indra/media_plugins/cef/CMakeLists.txt
index 0d1a833936..28e5f64132 100644
--- a/indra/media_plugins/cef/CMakeLists.txt
+++ b/indra/media_plugins/cef/CMakeLists.txt
@@ -10,18 +10,10 @@ include(Linking)
 include(PluginAPI)
 
 include(CEFPlugin)
-
+include(GLIB)
 
 ### media_plugin_cef
 
-if(NOT ADDRESS_SIZE EQUAL 32)
-  if(WINDOWS)
-    ##add_definitions(/FIXED:NO)
-  else(WINDOWS) # not windows therefore gcc LINUX and DARWIN
-    add_definitions(-fPIC)
-  endif(WINDOWS)
-endif(NOT ADDRESS_SIZE EQUAL 32)
-
 set(media_plugin_cef_SOURCE_FILES
     media_plugin_cef.cpp
     )
@@ -32,10 +24,36 @@ set(media_plugin_cef_HEADER_FILES
 
 # Select which VolumeCatcher implementation to use
 if (LINUX)
-  message(FATAL_ERROR "CEF plugin has been enabled for a Linux compile.\n"
-    "  Please create a volume_catcher implementation for this platform.")
+  foreach( PULSE_FILE pulse/introspect.h pulse/context.h pulse/subscribe.h pulse/glib-mainloop.h )
+    find_path( PULSE_FILE_${PULSE_FILE}_FOUND ${PULSE_FILE} NO_CACHE)
+    if( NOT PULSE_FILE_${PULSE_FILE}_FOUND )
+      message( "Looking for ${PULSE_FILE} ... not found")
+      message( FATAL_ERROR "Pulse header not found" )
+    else()
+      message( "Looking for ${PULSE_FILE} ... found")
+    endif()
+  endforeach()
+  
+  include(FindPipeWire)
+  include_directories(SYSTEM ${PIPEWIRE_INCLUDE_DIRS} ${SPA_INCLUDE_DIRS})
+  
+  message( "Building with Linux volume catcher for PipeWire and PulseAudio" )
+
+  list(APPEND media_plugin_cef_HEADER_FILES
+    linux/volume_catcher_linux.h
+  )
+
+  set(LINUX_VOLUME_CATCHER 
+    linux/volume_catcher_linux.cpp 
+    linux/volume_catcher_pulseaudio.cpp
+    linux/volume_catcher_pipewire.cpp 
+  )
+
+  list(APPEND media_plugin_cef_SOURCE_FILES ${LINUX_VOLUME_CATCHER})
+  set(CMAKE_SHARED_LINKER_FLAGS  "-Wl,--build-id -Wl,-rpath,'$ORIGIN:$ORIGIN/../../lib'")
+  list(APPEND media_plugin_cef_LINK_LIBRARIES llwindow )
 elseif (DARWIN)
-  list(APPEND media_plugin_cef_SOURCE_FILES mac_volume_catcher_null.cpp)
+  list(APPEND media_plugin_cef_SOURCE_FILES volume_catcher_null.cpp)
   find_library(CORESERVICES_LIBRARY CoreServices)
   find_library(AUDIOUNIT_LIBRARY AudioUnit)
   set( media_plugin_cef_LINK_LIBRARIES
@@ -60,6 +78,7 @@ add_library(media_plugin_cef
 target_link_libraries(media_plugin_cef
         media_plugin_base
         ll::cef
+        ll::glib_headers
 )
 
 if (WINDOWS)
diff --git a/indra/media_plugins/cef/linux/volume_catcher_linux.cpp b/indra/media_plugins/cef/linux/volume_catcher_linux.cpp
new file mode 100644
index 0000000000..7d33242063
--- /dev/null
+++ b/indra/media_plugins/cef/linux/volume_catcher_linux.cpp
@@ -0,0 +1,78 @@
+/**
+ * @file volume_catcher.cpp
+ * @brief Linux volume catcher which will pick an implementation to use
+ *
+ * @cond
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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 "volume_catcher_linux.h"
+
+VolumeCatcher::VolumeCatcher()
+{
+}
+
+void VolumeCatcher::onEnablePipeWireVolumeCatcher(bool enable)
+{
+    if (pimpl != nullptr)
+        return;
+
+    if (enable)
+    {
+        LL_DEBUGS() << "volume catcher using pipewire" << LL_ENDL;
+        pimpl = new VolumeCatcherPipeWire();
+    }
+    else
+    {
+        LL_DEBUGS() << "volume catcher using pulseaudio" << LL_ENDL;
+        pimpl = new VolumeCatcherPulseAudio();
+    }
+}
+
+VolumeCatcher::~VolumeCatcher()
+{
+    if (pimpl != nullptr)
+    {
+        delete pimpl;
+        pimpl = nullptr;
+    }
+}
+
+void VolumeCatcher::setVolume(F32 volume)
+{
+    if (pimpl != nullptr) {
+        pimpl->setVolume(volume);
+    }
+}
+
+void VolumeCatcher::setPan(F32 pan)
+{
+    if (pimpl != nullptr)
+        pimpl->setPan(pan);
+}
+
+void VolumeCatcher::pump()
+{
+    if (pimpl != nullptr)
+        pimpl->pump();
+}
diff --git a/indra/media_plugins/cef/linux/volume_catcher_linux.h b/indra/media_plugins/cef/linux/volume_catcher_linux.h
new file mode 100644
index 0000000000..505f9ffb31
--- /dev/null
+++ b/indra/media_plugins/cef/linux/volume_catcher_linux.h
@@ -0,0 +1,149 @@
+/**
+ * @file volume_catcher_impl.h
+ * @brief
+ *
+ * @cond
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ */
+
+#ifndef VOLUME_CATCHER_LINUX_H
+#define VOLUME_CATCHER_LINUX_H
+
+#include "linden_common.h"
+
+#include "../volume_catcher.h"
+
+#include <unordered_set>
+#include <mutex>
+
+extern "C" {
+// There's no special reason why we want the *glib* PA mainloop, but the generic polling implementation seems broken.
+#include <pulse/glib-mainloop.h>
+#include <pulse/context.h>
+
+#include <pipewire/pipewire.h>
+
+#include "apr_pools.h"
+#include "apr_dso.h"
+}
+
+#include "media_plugin_base.h"
+
+class VolumeCatcherImpl
+{
+public:
+    virtual ~VolumeCatcherImpl() = default;
+
+    virtual void setVolume(F32 volume) = 0; // 0.0 - 1.0
+
+    // Set the left-right pan of audio sources
+    // where -1.0 = left, 0 = center, and 1.0 = right
+    virtual void setPan(F32 pan) = 0;
+
+    virtual void pump() = 0; // call this at least a few times a second if you can - it affects how quickly we can 'catch' a new audio source and adjust its volume
+};
+
+class VolumeCatcherPulseAudio : public VolumeCatcherImpl
+{
+public:
+    VolumeCatcherPulseAudio();
+    ~VolumeCatcherPulseAudio();
+
+    void setVolume(F32 volume);
+    void setPan(F32 pan);
+    void pump();
+
+    // for internal use - can't be private because used from our C callbacks
+
+    bool loadsyms(std::string pa_dso_name);
+    void init();
+    void cleanup();
+
+    void update_all_volumes(F32 volume);
+    void update_index_volume(U32 index, F32 volume);
+    void connected_okay();
+
+    std::set<U32> mSinkInputIndices;
+    std::map<U32,U32> mSinkInputNumChannels;
+    F32 mDesiredVolume;
+    pa_glib_mainloop *mMainloop;
+    pa_context *mPAContext;
+    bool mConnected;
+    bool mGotSyms;
+};
+
+class VolumeCatcherPipeWire : public VolumeCatcherImpl
+{
+public:
+    VolumeCatcherPipeWire();
+    ~VolumeCatcherPipeWire();
+
+    bool loadsyms(std::string pw_dso_name);
+    void init();
+    void cleanup();
+
+    // some of these should be private
+
+    void lock();
+    void unlock();
+
+    void setVolume(F32 volume);
+    void setPan(F32 pan);
+    void pump();
+
+    void handleRegistryEventGlobal(
+        uint32_t id, uint32_t permissions, const char* type,
+        uint32_t version, const struct spa_dict* props
+    );
+
+    class ChildNode
+    {
+    public:
+        bool mActive = false;
+
+        pw_proxy* mProxy = nullptr;
+        spa_hook mNodeListener {};
+        spa_hook mProxyListener {};
+        VolumeCatcherPipeWire* mImpl = nullptr;
+
+        void updateVolume();
+        void destroy();
+    };
+
+    bool mGotSyms = false;
+
+    F32 mVolume = 1.0f; // max by default
+    // F32 mPan = 0.0f; // center
+
+    pw_thread_loop* mThreadLoop = nullptr;
+    pw_context* mContext = nullptr;
+    pw_core* mCore = nullptr;
+    pw_registry* mRegistry = nullptr;
+    spa_hook mRegistryListener;
+
+    std::unordered_set<ChildNode*> mChildNodes;
+    std::mutex mChildNodesMutex;
+    std::mutex mCleanupMutex;
+};
+
+#endif // VOLUME_CATCHER_LINUX_H
diff --git a/indra/media_plugins/cef/linux/volume_catcher_pipewire.cpp b/indra/media_plugins/cef/linux/volume_catcher_pipewire.cpp
new file mode 100755
index 0000000000..a8f1366d6f
--- /dev/null
+++ b/indra/media_plugins/cef/linux/volume_catcher_pipewire.cpp
@@ -0,0 +1,333 @@
+/**
+ * @file volume_catcher_pipewire.cpp
+ * @brief A Linux-specific, PipeWire-specific hack to detect and volume-adjust new audio sources
+ *
+ * @cond
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ */
+
+/*
+  The high-level design is as follows:
+  1) Connect to the PipeWire daemon
+  2) Find all existing and new audio nodes
+  3) Examine PID and parent PID's to see if it belongs to our process
+  4) If so, tell PipeWire to adjust the volume of that node
+  5) Keep a list of all audio nodes and adjust when we setVolume()
+ */
+
+#include "linden_common.h"
+
+#include "volume_catcher_linux.h"
+
+extern "C" {
+#include <spa/pod/builder.h>
+#include <spa/param/props.h>
+}
+
+SymbolGrabber pwSymbolGrabber;
+
+#include "volume_catcher_pipewire_syms.inc"
+
+////////////////////////////////////////////////////
+
+VolumeCatcherPipeWire::VolumeCatcherPipeWire()
+{
+    init();
+}
+
+VolumeCatcherPipeWire::~VolumeCatcherPipeWire()
+{
+    cleanup();
+}
+
+static void registryEventGlobal(
+    void *data, uint32_t id, uint32_t permissions, const char *type,
+    uint32_t version, const struct spa_dict *props)
+{
+    static_cast<VolumeCatcherPipeWire*>(data)->handleRegistryEventGlobal(
+        id, permissions, type, version, props
+    );
+}
+
+static const struct pw_registry_events REGISTRY_EVENTS = {
+    .version = PW_VERSION_REGISTRY_EVENTS,
+    .global = registryEventGlobal,
+};
+
+bool VolumeCatcherPipeWire::loadsyms(std::string pw_dso_name)
+{
+    return pwSymbolGrabber.grabSymbols({ pw_dso_name });
+}
+
+void VolumeCatcherPipeWire::init()
+{
+    LL_DEBUGS() << "init" << LL_ENDL;
+
+    mGotSyms = loadsyms("libpipewire-0.3.so.0");
+
+    if (!mGotSyms)
+        return;
+
+    LL_DEBUGS() << "successfully got symbols" << LL_ENDL;
+
+    llpw_init(nullptr, nullptr);
+
+    mThreadLoop = llpw_thread_loop_new("SL Plugin Volume Adjuster", nullptr);
+
+    if (!mThreadLoop)
+        return;
+
+    // i dont think we need to lock this early
+    // std::lock_guard pwLock(*this);
+
+    mContext = llpw_context_new(
+        llpw_thread_loop_get_loop(mThreadLoop), nullptr, 0
+    );
+
+    if (!mContext)
+        return;
+
+    mCore = llpw_context_connect(mContext, nullptr, 0);
+
+    if (!mCore)
+        return;
+
+    mRegistry = pw_core_get_registry(mCore, PW_VERSION_REGISTRY, 0);
+
+    LL_DEBUGS() << "pw_core_get_registry: " <<  (mRegistry?"success":"nullptr") << LL_ENDL;
+
+    spa_zero(mRegistryListener);
+
+    pw_registry_add_listener(
+        mRegistry, &mRegistryListener, &REGISTRY_EVENTS, this
+    );
+
+    llpw_thread_loop_start(mThreadLoop);
+
+    LL_DEBUGS() << "thread loop started" << LL_ENDL;
+}
+
+void VolumeCatcherPipeWire::cleanup()
+{
+    {
+        std::unique_lock childNodesLock(mChildNodesMutex);
+        for (auto *childNode: mChildNodes)
+            childNode->destroy();
+
+        mChildNodes.clear();
+    }
+
+    {
+        std::unique_lock pwLock(mCleanupMutex);
+        if (mRegistry)
+            llpw_proxy_destroy((struct pw_proxy *) mRegistry);
+
+        spa_zero(mRegistryListener);
+
+        if (mCore)
+            llpw_core_disconnect(mCore);
+        if (mContext)
+            llpw_context_destroy(mContext);
+    }
+
+    if (!mThreadLoop)
+        return;
+
+    llpw_thread_loop_stop(mThreadLoop);
+    llpw_thread_loop_destroy(mThreadLoop);
+
+    LL_DEBUGS() << "cleanup done" << LL_ENDL;
+}
+
+void VolumeCatcherPipeWire::lock()
+{
+    if (!mThreadLoop)
+        return;
+
+    llpw_thread_loop_lock(mThreadLoop);
+}
+
+void VolumeCatcherPipeWire::unlock()
+{
+    if (!mThreadLoop)
+        return;
+
+    llpw_thread_loop_unlock(mThreadLoop);
+}
+
+const uint32_t channels = 1;
+const float resetVolumes[channels] = { 1.0f };
+
+void VolumeCatcherPipeWire::ChildNode::updateVolume()
+{
+    if (!mActive)
+        return;
+
+    F32 volume = std::clamp(mImpl->mVolume, 0.0f, 1.0f);
+
+    const float volumes[channels] = { volume };
+
+    uint8_t buffer[512];
+
+    spa_pod_builder builder;
+    spa_pod_builder_init(&builder, buffer, sizeof(buffer));
+
+    spa_pod_frame frame;
+    spa_pod_builder_push_object(&builder, &frame, SPA_TYPE_OBJECT_Props, SPA_PARAM_Props);
+
+    // resets system-wide memorized volume for chromium (not google chrome) to 100%
+    spa_pod_builder_prop(&builder, SPA_PROP_channelVolumes, 0);
+    spa_pod_builder_array(&builder, sizeof(float), SPA_TYPE_Float, channels, resetVolumes);
+
+    // sets temporary volume
+    spa_pod_builder_prop(&builder, SPA_PROP_softVolumes, 0);
+    spa_pod_builder_array(&builder, sizeof(float), SPA_TYPE_Float, channels, volumes);
+
+    spa_pod* pod = static_cast<spa_pod*>(spa_pod_builder_pop(&builder, &frame));
+
+    {
+        std::lock_guard pwLock(*mImpl);
+        pw_node_set_param(mProxy, SPA_PARAM_Props, 0, pod);
+    }
+}
+
+void VolumeCatcherPipeWire::ChildNode::destroy()
+{
+    if (!mActive)
+        return;
+
+    mActive = false;
+
+    {
+        std::unique_lock childNodesLock(mImpl->mChildNodesMutex);
+        mImpl->mChildNodes.erase(this);
+    }
+
+    spa_hook_remove(&mNodeListener);
+    spa_hook_remove(&mProxyListener);
+
+    {
+        std::lock_guard pwLock(*mImpl);
+        llpw_proxy_destroy(mProxy);
+    }
+}
+
+static void nodeEventInfo(void* data, const struct pw_node_info* info)
+{
+    const char* processId = spa_dict_lookup(info->props, PW_KEY_APP_PROCESS_ID);
+
+    if (processId == nullptr)
+        return;
+
+    pid_t pid = atoll(processId);
+
+    if (!isPluginPid(pid))
+        return;
+
+    const char* appName = spa_dict_lookup(info->props, PW_KEY_APP_NAME);
+    LL_DEBUGS() << "got app: " << appName << LL_ENDL;
+
+    auto* const childNode = static_cast<VolumeCatcherPipeWire::ChildNode*>(data);
+    LL_DEBUGS() << "init volume: " << childNode->mImpl->mVolume  << LL_ENDL;
+
+    childNode->updateVolume();
+
+    {
+        std::lock_guard childNodesLock(childNode->mImpl->mChildNodesMutex);
+        childNode->mImpl->mChildNodes.insert(childNode);
+    }
+}
+
+static const struct pw_node_events NODE_EVENTS = {
+    .version = PW_VERSION_CLIENT_EVENTS,
+    .info = nodeEventInfo,
+};
+
+static void proxyEventDestroy(void* data)
+{
+    auto* const childNode = static_cast<VolumeCatcherPipeWire::ChildNode*>(data);
+    childNode->destroy();
+}
+
+static void proxyEventRemoved(void* data)
+{
+    auto* const childNode = static_cast<VolumeCatcherPipeWire::ChildNode*>(data);
+    childNode->destroy();
+}
+
+static const struct pw_proxy_events PROXY_EVENTS = {
+    .version = PW_VERSION_PROXY_EVENTS,
+    .destroy = proxyEventDestroy,
+    .removed = proxyEventRemoved,
+};
+
+void VolumeCatcherPipeWire::handleRegistryEventGlobal(
+    uint32_t id, uint32_t permissions, const char *type, uint32_t version,
+    const struct spa_dict *props)
+{
+    if (props == nullptr  || type == nullptr || strcmp(type, PW_TYPE_INTERFACE_Node) != 0)
+        return;
+
+    const char* mediaClass = spa_dict_lookup(props, PW_KEY_MEDIA_CLASS);
+
+    if (mediaClass == nullptr || strcmp(mediaClass, "Stream/Output/Audio") != 0)
+        return;
+
+    pw_proxy* proxy = static_cast<pw_proxy*>(
+        pw_registry_bind(mRegistry, id, type, PW_VERSION_CLIENT, sizeof(ChildNode))
+    );
+
+    auto* const childNode = static_cast<ChildNode*>(llpw_proxy_get_user_data(proxy));
+
+    childNode->mActive = true;
+    childNode->mProxy = proxy;
+    childNode->mImpl = this;
+
+    pw_node_add_listener(proxy, &childNode->mNodeListener, &NODE_EVENTS, childNode);
+    llpw_proxy_add_listener(proxy, &childNode->mProxyListener, &PROXY_EVENTS, childNode);
+}
+
+void VolumeCatcherPipeWire::setVolume(F32 volume)
+{
+    LL_DEBUGS() << "setting volume to: " << volume << LL_ENDL;
+
+    mVolume = volume;
+
+    {
+        std::unique_lock childNodeslock(mChildNodesMutex);
+        std::unordered_set<ChildNode *> copyOfChildNodes(mChildNodes);
+
+        LL_DEBUGS() << "found " << copyOfChildNodes.size() << " child nodes" << LL_ENDL;
+
+        for (auto* childNode : copyOfChildNodes)
+            childNode->updateVolume();
+    }
+}
+
+void VolumeCatcherPipeWire::setPan(F32 pan)
+{
+}
+
+void VolumeCatcherPipeWire::pump()
+{
+}
diff --git a/indra/media_plugins/cef/linux/volume_catcher_pipewire_syms.inc b/indra/media_plugins/cef/linux/volume_catcher_pipewire_syms.inc
new file mode 100644
index 0000000000..dbc0f5f169
--- /dev/null
+++ b/indra/media_plugins/cef/linux/volume_catcher_pipewire_syms.inc
@@ -0,0 +1,26 @@
+#define G pwSymbolGrabber
+
+// required symbols to grab
+LL_GRAB_SYM(G, true, pw_init, void, int *argc, char **argv[]);
+// LL_GRAB_SYM(G, true, pw_main_loop_new, struct pw_main_loop *, const struct spa_dict *props);
+// LL_GRAB_SYM(G, true, pw_main_loop_get_loop, struct pw_loop *, struct pw_main_loop *loop);
+// LL_GRAB_SYM(G, true, pw_main_loop_destroy, void, struct pw_main_loop *loop);
+// LL_GRAB_SYM(G, true, pw_main_loop_run, void, struct pw_main_loop *loop);
+LL_GRAB_SYM(G, true, pw_context_new, struct pw_context *, struct pw_loop *main_loop, struct pw_properties *props, size_t user_data_size);
+LL_GRAB_SYM(G, true, pw_context_destroy, void, struct pw_context *context);
+LL_GRAB_SYM(G, true, pw_context_connect, struct pw_core *, struct pw_context *context, struct pw_properties *properties, size_t user_data_size);
+LL_GRAB_SYM(G, true, pw_thread_loop_new, struct pw_thread_loop *, const char *name, const struct spa_dict *props);
+LL_GRAB_SYM(G, true, pw_thread_loop_destroy, void, struct pw_thread_loop *loop);
+LL_GRAB_SYM(G, true, pw_thread_loop_get_loop, struct pw_loop *, struct pw_thread_loop *loop);
+LL_GRAB_SYM(G, true, pw_thread_loop_start, int, struct pw_thread_loop *loop);
+LL_GRAB_SYM(G, true, pw_thread_loop_stop, void, struct pw_thread_loop *loop);
+LL_GRAB_SYM(G, true, pw_thread_loop_lock, void, struct pw_thread_loop *loop);
+LL_GRAB_SYM(G, true, pw_thread_loop_unlock, void, struct pw_thread_loop *loop);
+LL_GRAB_SYM(G, true, pw_proxy_add_listener, void, struct pw_proxy *proxy, struct spa_hook *listener, const struct pw_proxy_events *events, void *data);
+LL_GRAB_SYM(G, true, pw_proxy_destroy, void, struct pw_proxy *proxy);
+LL_GRAB_SYM(G, true, pw_proxy_get_user_data, void *, struct pw_proxy *proxy);
+LL_GRAB_SYM(G, true, pw_core_disconnect, int, struct pw_core *core);
+
+// optional symbols to grab
+
+#undef G
diff --git a/indra/media_plugins/cef/linux/volume_catcher_pulseaudio.cpp b/indra/media_plugins/cef/linux/volume_catcher_pulseaudio.cpp
new file mode 100755
index 0000000000..f8a48a91fd
--- /dev/null
+++ b/indra/media_plugins/cef/linux/volume_catcher_pulseaudio.cpp
@@ -0,0 +1,322 @@
+/**
+ * @file volume_catcher_pulseaudio.cpp
+ * @brief A Linux-specific, PulseAudio-specific hack to detect and volume-adjust new audio sources
+ *
+ * @cond
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ */
+
+/*
+  The high-level design is as follows:
+  1) Connect to the PulseAudio daemon
+  2) Watch for the creation of new audio players connecting to the daemon (this includes ALSA clients running on the PulseAudio emulation layer, such as Flash plugins)
+  3) Examine any new audio player's PID to see if it belongs to our own process
+  4) If so, tell PA to adjust the volume of that audio player ('sink input' in PA parlance)
+  5) Keep a list of all living audio players that we care about, adjust the volumes of all of them when we get a new setVolume() call
+ */
+
+#include "linden_common.h"
+
+#include "volume_catcher_linux.h"
+
+extern "C" {
+#include <glib.h>
+#include <glib-object.h>
+
+#include <pulse/introspect.h>
+
+#include <pulse/subscribe.h>
+}
+
+SymbolGrabber paSymbolGrabber;
+
+#include "volume_catcher_pulseaudio_syms.inc"
+#include "volume_catcher_pulseaudio_glib_syms.inc"
+
+////////////////////////////////////////////////////
+
+// PulseAudio requires a chain of callbacks with C linkage
+extern "C" {
+    void callback_discovered_sinkinput(pa_context *context, const pa_sink_input_info *i, int eol, void *userdata);
+    void callback_subscription_alert(pa_context *context, pa_subscription_event_type_t t, uint32_t index, void *userdata);
+    void callback_context_state(pa_context *context, void *userdata);
+}
+
+VolumeCatcherPulseAudio::VolumeCatcherPulseAudio()
+    : mDesiredVolume(0.0f),
+      mMainloop(nullptr),
+      mPAContext(nullptr),
+      mConnected(false),
+      mGotSyms(false)
+{
+    init();
+}
+
+VolumeCatcherPulseAudio::~VolumeCatcherPulseAudio()
+{
+    cleanup();
+}
+
+bool VolumeCatcherPulseAudio::loadsyms(std::string pulse_dso_name)
+{
+    return paSymbolGrabber.grabSymbols({ pulse_dso_name });
+}
+
+void VolumeCatcherPulseAudio::init()
+{
+    // try to be as defensive as possible because PA's interface is a
+    // bit fragile and (for our purposes) we'd rather simply not function
+    // than crash
+
+    // we cheat and rely upon libpulse-mainloop-glib.so.0 to pull-in
+    // libpulse.so.0 - this isn't a great assumption, and the two DSOs should
+    // probably be loaded separately.  Our Linux DSO framework needs refactoring,
+    // we do this sort of thing a lot with practically identical logic...
+    mGotSyms = loadsyms("libpulse-mainloop-glib.so.0");
+
+    if (!mGotSyms)
+        mGotSyms = loadsyms("libpulse.so.0");
+
+    if (!mGotSyms)
+        return;
+
+    mMainloop = llpa_glib_mainloop_new(g_main_context_default());
+
+    if (mMainloop)
+    {
+        pa_mainloop_api *api = llpa_glib_mainloop_get_api(mMainloop);
+
+        if (api)
+        {
+            pa_proplist *proplist = llpa_proplist_new();
+
+            if (proplist)
+            {
+                llpa_proplist_sets(proplist, PA_PROP_APPLICATION_ICON_NAME, "multimedia-player");
+                llpa_proplist_sets(proplist, PA_PROP_APPLICATION_ID, "com.secondlife.viewer.mediaplugvoladjust");
+                llpa_proplist_sets(proplist, PA_PROP_APPLICATION_NAME, "SL Plugin Volume Adjuster");
+                llpa_proplist_sets(proplist, PA_PROP_APPLICATION_VERSION, "1");
+
+                // plain old pa_context_new() is broken!
+                mPAContext = llpa_context_new_with_proplist(api, nullptr, proplist);
+
+                llpa_proplist_free(proplist);
+            }
+        }
+    }
+
+    // Now we've set up a PA context and mainloop, try connecting the
+    // PA context to a PA daemon.
+    if (mPAContext)
+    {
+        llpa_context_set_state_callback(mPAContext, callback_context_state, this);
+        pa_context_flags_t cflags = (pa_context_flags)0; // maybe add PA_CONTEXT_NOAUTOSPAWN?
+        if (llpa_context_connect(mPAContext, nullptr, cflags, nullptr) >= 0)
+        {
+            // Okay!  We haven't definitely connected, but we
+            // haven't definitely failed yet.
+        }
+        else
+        {
+            // Failed to connect to PA manager... we'll leave
+            // things like that.  Perhaps we should try again later.
+        }
+    }
+}
+
+void VolumeCatcherPulseAudio::cleanup()
+{
+    mConnected = false;
+
+    if (mGotSyms && mPAContext)
+    {
+        llpa_context_disconnect(mPAContext);
+        llpa_context_unref(mPAContext);
+    }
+
+    mPAContext = nullptr;
+
+    if (mGotSyms && mMainloop)
+        llpa_glib_mainloop_free(mMainloop);
+
+    mMainloop = nullptr;
+}
+
+void VolumeCatcherPulseAudio::setVolume(F32 volume)
+{
+    mDesiredVolume = volume;
+
+    if (!mGotSyms)
+        return;
+
+    if (mConnected && mPAContext)
+    {
+        update_all_volumes(mDesiredVolume);
+    }
+
+    pump();
+}
+
+void VolumeCatcherPulseAudio::setPan(F32 pan)
+{
+}
+
+void VolumeCatcherPulseAudio::pump()
+{
+    gboolean may_block = FALSE;
+    g_main_context_iteration(g_main_context_default(), may_block);
+}
+
+void VolumeCatcherPulseAudio::connected_okay()
+{
+    pa_operation *op;
+
+    // fetch global list of existing sinkinputs
+    if ((op = llpa_context_get_sink_input_info_list(mPAContext,
+                            callback_discovered_sinkinput,
+                            this)))
+    {
+        llpa_operation_unref(op);
+    }
+
+    // subscribe to future global sinkinput changes
+    llpa_context_set_subscribe_callback(mPAContext,
+                        callback_subscription_alert,
+                        this);
+    if ((op = llpa_context_subscribe(mPAContext, (pa_subscription_mask_t)
+                     (PA_SUBSCRIPTION_MASK_SINK_INPUT),
+                                     nullptr, nullptr)))
+    {
+        llpa_operation_unref(op);
+    }
+}
+
+void VolumeCatcherPulseAudio::update_all_volumes(F32 volume)
+{
+    for (std::set<U32>::iterator it = mSinkInputIndices.begin();
+         it != mSinkInputIndices.end(); ++it)
+    {
+        update_index_volume(*it, volume);
+    }
+}
+
+void VolumeCatcherPulseAudio::update_index_volume(U32 index, F32 volume)
+{
+    static pa_cvolume cvol;
+    llpa_cvolume_set(&cvol, mSinkInputNumChannels[index],
+             llpa_sw_volume_from_linear(volume));
+
+    pa_context *c = mPAContext;
+    uint32_t idx = index;
+    const pa_cvolume *cvolumep = &cvol;
+    pa_context_success_cb_t cb = nullptr; // okay as null
+    void *userdata = nullptr; // okay as null
+
+    pa_operation *op;
+    if ((op = llpa_context_set_sink_input_volume(c, idx, cvolumep, cb, userdata)))
+        llpa_operation_unref(op);
+}
+
+void callback_discovered_sinkinput(pa_context *context, const pa_sink_input_info *sii, int eol, void *userdata)
+{
+    VolumeCatcherPulseAudio *impl = dynamic_cast<VolumeCatcherPulseAudio*>((VolumeCatcherPulseAudio*)userdata);
+    llassert(impl);
+
+    if (0 == eol)
+    {
+        pa_proplist *proplist = sii->proplist;
+        pid_t sinkpid = atoll(llpa_proplist_gets(proplist, PA_PROP_APPLICATION_PROCESS_ID));
+
+        if (isPluginPid( sinkpid )) // does the discovered sinkinput belong to this process?
+        {
+            bool is_new = (impl->mSinkInputIndices.find(sii->index) == impl->mSinkInputIndices.end());
+
+            impl->mSinkInputIndices.insert(sii->index);
+            impl->mSinkInputNumChannels[sii->index] = sii->channel_map.channels;
+
+            if (is_new)
+            {
+                // new!
+                impl->update_index_volume(sii->index, impl->mDesiredVolume);
+            }
+            else
+            {
+                // seen it already, do nothing.
+            }
+        }
+    }
+}
+
+void callback_subscription_alert(pa_context *context, pa_subscription_event_type_t t, uint32_t index, void *userdata)
+{
+    VolumeCatcherPulseAudio *impl = dynamic_cast<VolumeCatcherPulseAudio*>((VolumeCatcherPulseAudio*)userdata);
+    llassert(impl);
+
+    switch (t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK)
+    {
+        case PA_SUBSCRIPTION_EVENT_SINK_INPUT:
+            if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) ==  PA_SUBSCRIPTION_EVENT_REMOVE)
+            {
+                // forget this sinkinput, if we were caring about it
+                impl->mSinkInputIndices.erase(index);
+                impl->mSinkInputNumChannels.erase(index);
+            }
+            else if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_NEW)
+            {
+                // ask for more info about this new sinkinput
+                pa_operation *op;
+                if ((op = llpa_context_get_sink_input_info(impl->mPAContext, index, callback_discovered_sinkinput, impl)))
+                {
+                    llpa_operation_unref(op);
+                }
+            }
+            else
+            {
+                // property change on this sinkinput - we don't care.
+            }
+            break;
+
+        default:;
+    }
+}
+
+void callback_context_state(pa_context *context, void *userdata)
+{
+    VolumeCatcherPulseAudio *impl = dynamic_cast<VolumeCatcherPulseAudio*>((VolumeCatcherPulseAudio*)userdata);
+    llassert(impl);
+
+    switch (llpa_context_get_state(context))
+    {
+    case PA_CONTEXT_READY:
+        impl->mConnected = true;
+        impl->connected_okay();
+        break;
+    case PA_CONTEXT_TERMINATED:
+        impl->mConnected = false;
+        break;
+    case PA_CONTEXT_FAILED:
+        impl->mConnected = false;
+        break;
+    default:;
+    }
+}
diff --git a/indra/media_plugins/cef/linux/volume_catcher_pulseaudio_glib_syms.inc b/indra/media_plugins/cef/linux/volume_catcher_pulseaudio_glib_syms.inc
new file mode 100755
index 0000000000..e9b7196e51
--- /dev/null
+++ b/indra/media_plugins/cef/linux/volume_catcher_pulseaudio_glib_syms.inc
@@ -0,0 +1,10 @@
+#define G paSymbolGrabber
+
+// required symbols to grab
+LL_GRAB_SYM(G, true, pa_glib_mainloop_free, void, pa_glib_mainloop* g)
+LL_GRAB_SYM(G, true, pa_glib_mainloop_get_api, pa_mainloop_api*, pa_glib_mainloop* g)
+LL_GRAB_SYM(G, true, pa_glib_mainloop_new, pa_glib_mainloop *, GMainContext *c)
+
+// optional symbols to grab
+
+#undef G
diff --git a/indra/media_plugins/cef/linux/volume_catcher_pulseaudio_syms.inc b/indra/media_plugins/cef/linux/volume_catcher_pulseaudio_syms.inc
new file mode 100755
index 0000000000..4859a34405
--- /dev/null
+++ b/indra/media_plugins/cef/linux/volume_catcher_pulseaudio_syms.inc
@@ -0,0 +1,29 @@
+#define G paSymbolGrabber
+
+// required symbols to grab
+LL_GRAB_SYM(G, true, pa_context_connect, int, pa_context *c, const char *server, pa_context_flags_t flags, const pa_spawn_api *api)
+LL_GRAB_SYM(G, true, pa_context_disconnect, void, pa_context *c)
+LL_GRAB_SYM(G, true, pa_context_get_sink_input_info, pa_operation*, pa_context *c, uint32_t idx, pa_sink_input_info_cb_t cb, void *userdata)
+LL_GRAB_SYM(G, true, pa_context_get_sink_input_info_list, pa_operation*, pa_context *c, pa_sink_input_info_cb_t cb, void *userdata)
+LL_GRAB_SYM(G, true, pa_context_get_state, pa_context_state_t, pa_context *c)
+LL_GRAB_SYM(G, true, pa_context_new_with_proplist, pa_context*, pa_mainloop_api *mainloop, const char *name, pa_proplist *proplist)
+LL_GRAB_SYM(G, true, pa_context_set_sink_input_volume, pa_operation*, pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata)
+LL_GRAB_SYM(G, true, pa_context_set_state_callback, void, pa_context *c, pa_context_notify_cb_t cb, void *userdata)
+LL_GRAB_SYM(G, true, pa_context_set_subscribe_callback, void, pa_context *c, pa_context_subscribe_cb_t cb, void *userdata)
+LL_GRAB_SYM(G, true, pa_context_subscribe, pa_operation*, pa_context *c, pa_subscription_mask_t m, pa_context_success_cb_t cb, void *userdata)
+LL_GRAB_SYM(G, true, pa_context_unref, void, pa_context *c)
+LL_GRAB_SYM(G, true, pa_cvolume_set, pa_cvolume*, pa_cvolume *a, unsigned channels, pa_volume_t v)
+LL_GRAB_SYM(G, true, pa_operation_unref, void, pa_operation *o)
+LL_GRAB_SYM(G, true, pa_proplist_free, void, pa_proplist* p)
+LL_GRAB_SYM(G, true, pa_proplist_gets, const char*, pa_proplist *p, const char *key)
+LL_GRAB_SYM(G, true, pa_proplist_new, pa_proplist*, void)
+LL_GRAB_SYM(G, true, pa_proplist_sets, int, pa_proplist *p, const char *key, const char *value)
+LL_GRAB_SYM(G, true, pa_sw_volume_from_linear, pa_volume_t, double v)
+// LL_GRAB_SYM(G, true, pa_mainloop_free, void, pa_mainloop *m)
+// LL_GRAB_SYM(G, true, pa_mainloop_get_api, pa_mainloop_api *, pa_mainloop *m)
+// LL_GRAB_SYM(G, true, pa_mainloop_iterate, int, pa_mainloop *m, int block, int *retval)
+// LL_GRAB_SYM(G, true, pa_mainloop_new, pa_mainloop *, void)
+
+// optional symbols to grab
+
+#undef G
diff --git a/indra/media_plugins/cef/media_plugin_cef.cpp b/indra/media_plugins/cef/media_plugin_cef.cpp
index 64fc7e452b..9c205b558c 100644
--- a/indra/media_plugins/cef/media_plugin_cef.cpp
+++ b/indra/media_plugins/cef/media_plugin_cef.cpp
@@ -886,7 +886,7 @@ void MediaPluginCEF::receiveMessage(const char* message_string)
 
                 keyEvent(key_event, native_key_data);
 
-#elif LL_WINDOWS
+#else
                 std::string event = message_in.getValue("event");
                 LLSD native_key_data = message_in.getValueLLSD("native_key_data");
 
@@ -908,6 +908,13 @@ void MediaPluginCEF::receiveMessage(const char* message_string)
             {
                 mEnableMediaPluginDebugging = message_in.getValueBoolean("enable");
             }
+#if LL_LINUX
+            else if (message_name == "enable_pipewire_volume_catcher")
+            {
+                bool enable = message_in.getValueBoolean("enable");
+                mVolumeCatcher.onEnablePipeWireVolumeCatcher(enable);
+            }
+#endif
             if (message_name == "pick_file_response")
             {
                 LLSD file_list_llsd = message_in.getValueLLSD("file_list");
@@ -1050,6 +1057,28 @@ void MediaPluginCEF::keyEvent(dullahan::EKeyEvent key_event, LLSD native_key_dat
 
     mCEFLib->nativeKeyboardEventWin(msg, wparam, lparam);
 #endif
+
+#if LL_LINUX
+
+    uint32_t native_virtual_key = (uint32_t)(native_key_data["virtual_key"].asInteger());       // this is actually the SDL event.key.keysym.sym;
+    uint32_t native_virtual_key_win = (uint32_t)(native_key_data["virtual_key_win"].asInteger());
+    uint32_t native_modifiers = (uint32_t)(native_key_data["modifiers"].asInteger());
+
+    // only for non-printable keysyms, the actual text input is done in unicodeInput() below
+    if (native_virtual_key <= 0x1b || native_virtual_key >= 0x7f)
+    {
+        // set keypad flag, not sure if this even does anything
+        bool keypad = false;
+        if (native_virtual_key_win >= 0x60 && native_virtual_key_win <= 0x6f)
+        {
+            keypad = true;
+        }
+
+        // yes, we send native_virtual_key_win twice because native_virtual_key breaks it
+        mCEFLib->nativeKeyboardEventSDL2(key_event, native_virtual_key, native_modifiers, keypad);
+    }
+
+#endif // LL_LINUX
 };
 
 void MediaPluginCEF::unicodeInput(std::string event, LLSD native_key_data = LLSD::emptyMap())
@@ -1080,6 +1109,16 @@ void MediaPluginCEF::unicodeInput(std::string event, LLSD native_key_data = LLSD
     U64 lparam = ll_U32_from_sd(native_key_data["l_param"]);
     mCEFLib->nativeKeyboardEventWin(msg, wparam, lparam);
 #endif
+
+#if LL_LINUX
+
+    uint32_t native_scan_code = (uint32_t)(native_key_data["sdl_sym"].asInteger());
+    uint32_t native_virtual_key = (uint32_t)(native_key_data["virtual_key"].asInteger());
+    uint32_t native_modifiers = (uint32_t)(native_key_data["modifiers"].asInteger());
+
+    mCEFLib->nativeKeyboardEvent(dullahan::KE_KEY_DOWN, native_scan_code, native_virtual_key, native_modifiers);
+
+#endif // LL_LINUX
 };
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/indra/media_plugins/cef/volume_catcher.h b/indra/media_plugins/cef/volume_catcher.h
index ea97a24947..6933854e8e 100644
--- a/indra/media_plugins/cef/volume_catcher.h
+++ b/indra/media_plugins/cef/volume_catcher.h
@@ -35,19 +35,20 @@ class VolumeCatcherImpl;
 
 class VolumeCatcher
 {
- public:
+public:
     VolumeCatcher();
     ~VolumeCatcher();
 
-    void setVolume(F32 volume); // 0.0 - 1.0
-
-    // Set the left-right pan of audio sources
-    // where -1.0 = left, 0 = center, and 1.0 = right
+    void setVolume(F32 volume);
     void setPan(F32 pan);
 
-    void pump(); // call this at least a few times a second if you can - it affects how quickly we can 'catch' a new audio source and adjust its volume
+    void pump();
+
+#if LL_LINUX
+    void onEnablePipeWireVolumeCatcher(bool enable);
+#endif
 
- private:
+private:
     VolumeCatcherImpl *pimpl;
 };
 
diff --git a/indra/media_plugins/cef/mac_volume_catcher_null.cpp b/indra/media_plugins/cef/volume_catcher_null.cpp
index c479e24a95..1f0f1e8e38 100644
--- a/indra/media_plugins/cef/mac_volume_catcher_null.cpp
+++ b/indra/media_plugins/cef/volume_catcher_null.cpp
@@ -1,5 +1,5 @@
 /**
- * @file windows_volume_catcher.cpp
+ * @file volume_catcher_null.cpp
  * @brief A null implementation of volume level control of all audio channels opened by a process.
  *        We are using this for the macOS version for now until we can understand how to make the
  *        exitising mac_volume_catcher.cpp work without the (now, non-existant) QuickTime dependency
@@ -29,67 +29,25 @@
  */
 
 #include "volume_catcher.h"
-#include "llsingleton.h"
-class VolumeCatcherImpl : public LLSingleton<VolumeCatcherImpl>
-{
-    LLSINGLETON(VolumeCatcherImpl);
-    // This is a singleton class -- both callers and the component implementation should use getInstance() to find the instance.
-    ~VolumeCatcherImpl();
-
-public:
-
-    void setVolume(F32 volume);
-    void setPan(F32 pan);
-
-private:
-    F32     mVolume;
-    F32     mPan;
-    bool mSystemIsVistaOrHigher;
-};
-
-VolumeCatcherImpl::VolumeCatcherImpl()
-:   mVolume(1.0f),          // default volume is max
-    mPan(0.f)               // default pan is centered
-{
-}
-
-VolumeCatcherImpl::~VolumeCatcherImpl()
-{
-}
-
-void VolumeCatcherImpl::setVolume(F32 volume)
-{
-    mVolume = volume;
-}
-
-void VolumeCatcherImpl::setPan(F32 pan)
-{   // remember pan for calculating individual channel levels later
-    mPan = pan;
-}
 
 /////////////////////////////////////////////////////
 
 VolumeCatcher::VolumeCatcher()
 {
-    pimpl = VolumeCatcherImpl::getInstance();
 }
 
 VolumeCatcher::~VolumeCatcher()
 {
-    // Let the instance persist until exit.
 }
 
 void VolumeCatcher::setVolume(F32 volume)
 {
-    pimpl->setVolume(volume);
 }
 
 void VolumeCatcher::setPan(F32 pan)
 {
-    pimpl->setPan(pan);
 }
 
 void VolumeCatcher::pump()
 {
-    // No periodic tasks are necessary for this implementation.
 }
diff --git a/indra/media_plugins/cef/windows_volume_catcher.cpp b/indra/media_plugins/cef/windows_volume_catcher.cpp
index e7daeb5f74..1e52fee9de 100644
--- a/indra/media_plugins/cef/windows_volume_catcher.cpp
+++ b/indra/media_plugins/cef/windows_volume_catcher.cpp
@@ -44,7 +44,6 @@ public:
 private:
     F32     mVolume;
     F32     mPan;
-    bool mSystemIsVistaOrHigher;
 };
 
 VolumeCatcherImpl::VolumeCatcherImpl()
diff --git a/indra/media_plugins/example/CMakeLists.txt b/indra/media_plugins/example/CMakeLists.txt
index 41e2353f31..71343d5f85 100644
--- a/indra/media_plugins/example/CMakeLists.txt
+++ b/indra/media_plugins/example/CMakeLists.txt
@@ -13,14 +13,6 @@ include(ExamplePlugin)
 
 ### media_plugin_example
 
-if(NOT ADDRESS_SIZE EQUAL 32)
-  if(WINDOWS)
-    ##add_definitions(/FIXED:NO)
-  else(WINDOWS) # not windows therefore gcc LINUX and DARWIN
-    add_definitions(-fPIC)
-  endif(WINDOWS)
-endif(NOT ADDRESS_SIZE EQUAL 32)
-
 set(media_plugin_example_SOURCE_FILES
     media_plugin_example.cpp
     )
diff --git a/indra/media_plugins/gstreamer010/CMakeLists.txt b/indra/media_plugins/gstreamer010/CMakeLists.txt
deleted file mode 100644
index 38fc8201bf..0000000000
--- a/indra/media_plugins/gstreamer010/CMakeLists.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-# -*- cmake -*-
-
-project(media_plugin_gstreamer010)
-
-include(00-Common)
-include(LLCommon)
-include(LLImage)
-include(LLMath)
-include(LLWindow)
-include(Linking)
-include(PluginAPI)
-include(OpenGL)
-
-include(GStreamer010Plugin)
-
-### media_plugin_gstreamer010
-
-if(NOT ADDRESS_SIZE EQUAL 32)
-  if(WINDOWS)
-    ##add_definitions(/FIXED:NO)
-  else(WINDOWS) # not windows therefore gcc LINUX and DARWIN
-    add_definitions(-fPIC)
-  endif(WINDOWS)
-endif(NOT ADDRESS_SIZE EQUAL 32)
-
-set(media_plugin_gstreamer010_SOURCE_FILES
-    media_plugin_gstreamer010.cpp
-    llmediaimplgstreamer_syms.cpp
-    llmediaimplgstreamervidplug.cpp
-    )
-
-set(media_plugin_gstreamer010_HEADER_FILES
-    llmediaimplgstreamervidplug.h
-    llmediaimplgstreamer_syms.h
-    llmediaimplgstreamertriviallogging.h
-    )
-
-add_library(media_plugin_gstreamer010
-    SHARED
-    ${media_plugin_gstreamer010_SOURCE_FILES}
-    )
-
-target_link_libraries(media_plugin_gstreamer010
-        media_plugin_base
-        ll::gstreamer
-  )
diff --git a/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.cpp b/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.cpp
deleted file mode 100644
index dcc04b37e4..0000000000
--- a/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.cpp
+++ /dev/null
@@ -1,167 +0,0 @@
-/**
- * @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
diff --git a/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.h b/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.h
deleted file mode 100644
index 57d446c7df..0000000000
--- a/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms.h
+++ /dev/null
@@ -1,74 +0,0 @@
-/**
- * @file llmediaimplgstreamer_syms.h
- * @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 "linden_common.h"
-
-#if LL_GSTREAMER010_ENABLED
-
-extern "C" {
-#include <gst/gst.h>
-}
-
-bool grab_gst_syms(std::string gst_dso_name,
-           std::string gst_dso_name_vid);
-void ungrab_gst_syms();
-
-#define LL_GST_SYM(REQ, GSTSYM, RTN, ...) extern RTN (*ll##GSTSYM)(__VA_ARGS__)
-#include "llmediaimplgstreamer_syms_raw.inc"
-#include "llmediaimplgstreamer_syms_rawv.inc"
-#undef LL_GST_SYM
-
-// regrettable hacks to give us better runtime compatibility with older systems
-#define llg_return_if_fail(COND) do{if (!(COND)) return;}while(0)
-#define llg_return_val_if_fail(COND,V) do{if (!(COND)) return V;}while(0)
-
-// regrettable hacks because GStreamer was not designed for runtime loading
-#undef GST_TYPE_MESSAGE
-#define GST_TYPE_MESSAGE (llgst_message_get_type())
-#undef GST_TYPE_OBJECT
-#define GST_TYPE_OBJECT (llgst_object_get_type())
-#undef GST_TYPE_PIPELINE
-#define GST_TYPE_PIPELINE (llgst_pipeline_get_type())
-#undef GST_TYPE_ELEMENT
-#define GST_TYPE_ELEMENT (llgst_element_get_type())
-#undef GST_TYPE_VIDEO_SINK
-#define GST_TYPE_VIDEO_SINK (llgst_video_sink_get_type())
-// more regrettable hacks to stub-out these .h-exposed GStreamer internals
-void ll_gst_debug_register_funcptr(GstDebugFuncPtr func, gchar* ptrname);
-#undef _gst_debug_register_funcptr
-#define _gst_debug_register_funcptr ll_gst_debug_register_funcptr
-GstDebugCategory* ll_gst_debug_category_new(gchar *name, guint color, gchar *description);
-#undef _gst_debug_category_new
-#define _gst_debug_category_new ll_gst_debug_category_new
-#undef __gst_debug_enabled
-#define __gst_debug_enabled (0)
-
-// more hacks
-#define LLGST_MESSAGE_TYPE_NAME(M) (llgst_message_type_get_name(GST_MESSAGE_TYPE(M)))
-
-#endif // LL_GSTREAMER010_ENABLED
diff --git a/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms_raw.inc b/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms_raw.inc
deleted file mode 100644
index b33e59363d..0000000000
--- a/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms_raw.inc
+++ /dev/null
@@ -1,51 +0,0 @@
-
-// required symbols to grab
-LL_GST_SYM(true, gst_pad_peer_accept_caps, gboolean, GstPad *pad, GstCaps *caps);
-LL_GST_SYM(true, gst_buffer_new, GstBuffer*, void);
-LL_GST_SYM(true, gst_buffer_set_caps, void, GstBuffer*, GstCaps *);
-LL_GST_SYM(true, gst_structure_set_value, void, GstStructure *, const gchar *, const GValue*);
-LL_GST_SYM(true, gst_init_check, gboolean, int *argc, char **argv[], GError ** err);
-LL_GST_SYM(true, gst_message_get_type, GType, void);
-LL_GST_SYM(true, gst_message_type_get_name, const gchar*, GstMessageType type);
-LL_GST_SYM(true, gst_message_parse_error, void, GstMessage *message, GError **gerror, gchar **debug);
-LL_GST_SYM(true, gst_message_parse_warning, void, GstMessage *message, GError **gerror, gchar **debug);
-LL_GST_SYM(true, gst_message_parse_state_changed, void, GstMessage *message, GstState *oldstate, GstState *newstate, GstState *pending);
-LL_GST_SYM(true, gst_element_set_state, GstStateChangeReturn, GstElement *element, GstState state);
-LL_GST_SYM(true, gst_object_unref, void, gpointer object);
-LL_GST_SYM(true, gst_object_get_type, GType, void);
-LL_GST_SYM(true, gst_pipeline_get_type, GType, void);
-LL_GST_SYM(true, gst_pipeline_get_bus, GstBus*, GstPipeline *pipeline);
-LL_GST_SYM(true, gst_bus_add_watch, guint, GstBus * bus, GstBusFunc func, gpointer user_data);
-LL_GST_SYM(true, gst_element_factory_make, GstElement*, const gchar *factoryname, const gchar *name);
-LL_GST_SYM(true, gst_element_get_type, GType, void);
-LL_GST_SYM(true, gst_static_pad_template_get, GstPadTemplate*, GstStaticPadTemplate *pad_template);
-LL_GST_SYM(true, gst_element_class_add_pad_template, void, GstElementClass *klass, GstPadTemplate *temp);
-LL_GST_SYM(true, gst_element_class_set_details, void, GstElementClass *klass, const GstElementDetails *details);
-LL_GST_SYM(true, gst_caps_unref, void, GstCaps* caps);
-LL_GST_SYM(true, gst_caps_ref, GstCaps *, GstCaps* caps);
-//LL_GST_SYM(true, gst_caps_is_empty, gboolean, const GstCaps *caps);
-LL_GST_SYM(true, gst_caps_from_string, GstCaps *, const gchar *string);
-LL_GST_SYM(true, gst_caps_replace, void, GstCaps **caps, GstCaps *newcaps);
-LL_GST_SYM(true, gst_caps_get_structure, GstStructure *, const GstCaps *caps, guint index);
-LL_GST_SYM(true, gst_caps_copy, GstCaps *, const GstCaps * caps);
-//LL_GST_SYM(true, gst_caps_intersect, GstCaps *, const GstCaps *caps1, const GstCaps *caps2);
-LL_GST_SYM(true, gst_element_register, gboolean, GstPlugin *plugin, const gchar *name, guint rank, GType type);
-LL_GST_SYM(true, _gst_plugin_register_static, void, GstPluginDesc *desc);
-LL_GST_SYM(true, gst_structure_get_int, gboolean, const GstStructure *structure, const gchar *fieldname, gint *value);
-LL_GST_SYM(true, gst_structure_get_value, G_CONST_RETURN GValue *, const GstStructure *structure, const gchar *fieldname);
-LL_GST_SYM(true, gst_value_get_fraction_numerator, gint, const GValue *value);
-LL_GST_SYM(true, gst_value_get_fraction_denominator, gint, const GValue *value);
-LL_GST_SYM(true, gst_structure_get_name, G_CONST_RETURN gchar *, const GstStructure *structure);
-LL_GST_SYM(true, gst_element_seek, bool, GstElement *, gdouble, GstFormat, GstSeekFlags, GstSeekType, gint64, GstSeekType, gint64);
-
-// optional symbols to grab
-LL_GST_SYM(false, gst_registry_fork_set_enabled, void, gboolean enabled);
-LL_GST_SYM(false, gst_segtrap_set_enabled, void, gboolean enabled);
-LL_GST_SYM(false, gst_message_parse_buffering, void, GstMessage *message, gint *percent);
-LL_GST_SYM(false, gst_message_parse_info, void, GstMessage *message, GError **gerror, gchar **debug);
-LL_GST_SYM(false, gst_element_query_position, gboolean, GstElement *element, GstFormat *format, gint64 *cur);
-LL_GST_SYM(false, gst_version, void, guint *major, guint *minor, guint *micro, guint *nano);
-
-// GStreamer 'internal' symbols which may not be visible in some runtimes but are still used in expanded GStreamer header macros - yuck!  We'll substitute our own stubs for these.
-//LL_GST_SYM(true, _gst_debug_register_funcptr, void, GstDebugFuncPtr func, gchar* ptrname);
-//LL_GST_SYM(true, _gst_debug_category_new, GstDebugCategory *, gchar *name, guint color, gchar *description);
diff --git a/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms_rawv.inc b/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms_rawv.inc
deleted file mode 100644
index 14fbcb48b9..0000000000
--- a/indra/media_plugins/gstreamer010/llmediaimplgstreamer_syms_rawv.inc
+++ /dev/null
@@ -1,5 +0,0 @@
-
-// required symbols to grab
-LL_GST_SYM(true, gst_video_sink_get_type, GType, void);
-
-// optional symbols to grab
diff --git a/indra/media_plugins/gstreamer010/llmediaimplgstreamertriviallogging.h b/indra/media_plugins/gstreamer010/llmediaimplgstreamertriviallogging.h
deleted file mode 100644
index 43ebad6744..0000000000
--- a/indra/media_plugins/gstreamer010/llmediaimplgstreamertriviallogging.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/**
- * @file llmediaimplgstreamertriviallogging.h
- * @brief minimal logging utilities.
- *
- * @cond
- * $LicenseInfo:firstyear=2009&license=viewerlgpl$
- * 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
- */
-
-#ifndef __LLMEDIAIMPLGSTREAMERTRIVIALLOGGING_H__
-#define __LLMEDIAIMPLGSTREAMERTRIVIALLOGGING_H__
-
-#include <cstdio>
-
-extern "C" {
-#include <sys/types.h>
-#include <unistd.h>
-}
-
-/////////////////////////////////////////////////////////////////////////
-// Debug/Info/Warning macros.
-#define MSGMODULEFOO "(media plugin)"
-#define STDERRMSG(...) do{\
-    fprintf(stderr, " pid:%d: ", (int)getpid());\
-    fprintf(stderr, MSGMODULEFOO " %s:%d: ", __FUNCTION__, __LINE__);\
-    fprintf(stderr, __VA_ARGS__);\
-    fputc('\n',stderr);\
-  }while(0)
-#define NULLMSG(...) do{}while(0)
-
-#define DEBUGMSG NULLMSG
-#define INFOMSG  STDERRMSG
-#define WARNMSG  STDERRMSG
-/////////////////////////////////////////////////////////////////////////
-
-#endif /* __LLMEDIAIMPLGSTREAMERTRIVIALLOGGING_H__ */
diff --git a/indra/media_plugins/gstreamer010/llmediaimplgstreamervidplug.cpp b/indra/media_plugins/gstreamer010/llmediaimplgstreamervidplug.cpp
deleted file mode 100644
index acec0f2399..0000000000
--- a/indra/media_plugins/gstreamer010/llmediaimplgstreamervidplug.cpp
+++ /dev/null
@@ -1,526 +0,0 @@
-/**
- * @file llmediaimplgstreamervidplug.h
- * @brief Video-consuming static GStreamer plugin for gst-to-LLMediaImpl
- *
- * @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 "linden_common.h"
-
-#include <gst/gst.h>
-#include <gst/video/video.h>
-#include <gst/video/gstvideosink.h>
-
-#include "llmediaimplgstreamer_syms.h"
-#include "llmediaimplgstreamertriviallogging.h"
-
-#include "llmediaimplgstreamervidplug.h"
-
-
-GST_DEBUG_CATEGORY_STATIC (gst_slvideo_debug);
-#define GST_CAT_DEFAULT gst_slvideo_debug
-
-
-#define SLV_SIZECAPS ", width=(int)[1,2048], height=(int)[1,2048] "
-#define SLV_ALLCAPS GST_VIDEO_CAPS_RGBx SLV_SIZECAPS
-
-static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE (
-    (gchar*)"sink",
-    GST_PAD_SINK,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS (SLV_ALLCAPS)
-    );
-
-GST_BOILERPLATE (GstSLVideo, gst_slvideo, GstVideoSink,
-    GST_TYPE_VIDEO_SINK);
-
-static void gst_slvideo_set_property (GObject * object, guint prop_id,
-                      const GValue * value,
-                      GParamSpec * pspec);
-static void gst_slvideo_get_property (GObject * object, guint prop_id,
-                      GValue * value, GParamSpec * pspec);
-
-static void
-gst_slvideo_base_init (gpointer gclass)
-{
-    static GstElementDetails element_details = {
-        (gchar*)"PluginTemplate",
-        (gchar*)"Generic/PluginTemplate",
-        (gchar*)"Generic Template Element",
-        (gchar*)"Linden Lab"
-    };
-    GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
-
-    llgst_element_class_add_pad_template (element_class,
-                  llgst_static_pad_template_get (&sink_factory));
-    llgst_element_class_set_details (element_class, &element_details);
-}
-
-
-static void
-gst_slvideo_finalize (GObject * object)
-{
-    GstSLVideo *slvideo;
-    slvideo = GST_SLVIDEO (object);
-    if (slvideo->caps)
-    {
-        llgst_caps_unref(slvideo->caps);
-    }
-
-    G_OBJECT_CLASS(parent_class)->finalize (object);
-}
-
-
-static GstFlowReturn
-gst_slvideo_show_frame (GstBaseSink * bsink, GstBuffer * buf)
-{
-    GstSLVideo *slvideo;
-    llg_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
-
-    slvideo = GST_SLVIDEO(bsink);
-
-    DEBUGMSG("transferring a frame of %dx%d <- %p (%d)",
-         slvideo->width, slvideo->height, GST_BUFFER_DATA(buf),
-         slvideo->format);
-
-    if (GST_BUFFER_DATA(buf))
-    {
-        // copy frame and frame info into neutral territory
-        GST_OBJECT_LOCK(slvideo);
-        slvideo->retained_frame_ready = TRUE;
-        slvideo->retained_frame_width = slvideo->width;
-        slvideo->retained_frame_height = slvideo->height;
-        slvideo->retained_frame_format = slvideo->format;
-        int rowbytes =
-            SLVPixelFormatBytes[slvideo->retained_frame_format] *
-            slvideo->retained_frame_width;
-        int needbytes = rowbytes * slvideo->retained_frame_width;
-        // resize retained frame hunk only if necessary
-        if (needbytes != slvideo->retained_frame_allocbytes)
-        {
-            delete[] slvideo->retained_frame_data;
-            slvideo->retained_frame_data = new unsigned char[needbytes];
-            slvideo->retained_frame_allocbytes = needbytes;
-
-        }
-        // copy the actual frame data to neutral territory -
-        // flipped, for GL reasons
-        for (int ypos=0; ypos<slvideo->height; ++ypos)
-        {
-            memcpy(&slvideo->retained_frame_data[(slvideo->height-1-ypos)*rowbytes],
-                   &(((unsigned char*)GST_BUFFER_DATA(buf))[ypos*rowbytes]),
-                   rowbytes);
-        }
-        // done with the shared data
-        GST_OBJECT_UNLOCK(slvideo);
-    }
-
-    return GST_FLOW_OK;
-}
-
-
-static GstStateChangeReturn
-gst_slvideo_change_state(GstElement * element, GstStateChange transition)
-{
-    GstSLVideo *slvideo;
-    GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
-
-    slvideo = GST_SLVIDEO (element);
-
-    switch (transition) {
-    case GST_STATE_CHANGE_NULL_TO_READY:
-        break;
-    case GST_STATE_CHANGE_READY_TO_PAUSED:
-        break;
-    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
-        break;
-    default:
-        break;
-    }
-
-    ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
-    if (ret == GST_STATE_CHANGE_FAILURE)
-        return ret;
-
-    switch (transition) {
-    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
-        break;
-    case GST_STATE_CHANGE_PAUSED_TO_READY:
-        slvideo->fps_n = 0;
-        slvideo->fps_d = 1;
-        GST_VIDEO_SINK_WIDTH(slvideo) = 0;
-        GST_VIDEO_SINK_HEIGHT(slvideo) = 0;
-        break;
-    case GST_STATE_CHANGE_READY_TO_NULL:
-        break;
-    default:
-        break;
-    }
-
-    return ret;
-}
-
-
-static GstCaps *
-gst_slvideo_get_caps (GstBaseSink * bsink)
-{
-    GstSLVideo *slvideo;
-    slvideo = GST_SLVIDEO(bsink);
-
-    return llgst_caps_ref (slvideo->caps);
-}
-
-
-/* this function handles the link with other elements */
-static gboolean
-gst_slvideo_set_caps (GstBaseSink * bsink, GstCaps * caps)
-{
-    GstSLVideo *filter;
-    GstStructure *structure;
-
-    GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
-
-    filter = GST_SLVIDEO(bsink);
-
-    int width, height;
-    gboolean ret;
-    const GValue *fps;
-    const GValue *par;
-    structure = llgst_caps_get_structure (caps, 0);
-    ret = llgst_structure_get_int (structure, "width", &width);
-    ret = ret && llgst_structure_get_int (structure, "height", &height);
-    fps = llgst_structure_get_value (structure, "framerate");
-    ret = ret && (fps != NULL);
-    par = llgst_structure_get_value (structure, "pixel-aspect-ratio");
-    if (!ret)
-        return FALSE;
-
-    INFOMSG("** filter caps set with width=%d, height=%d", width, height);
-
-    GST_OBJECT_LOCK(filter);
-
-    filter->width = width;
-    filter->height = height;
-
-    filter->fps_n = llgst_value_get_fraction_numerator(fps);
-    filter->fps_d = llgst_value_get_fraction_denominator(fps);
-    if (par)
-    {
-        filter->par_n = llgst_value_get_fraction_numerator(par);
-        filter->par_d = llgst_value_get_fraction_denominator(par);
-    }
-    else
-    {
-        filter->par_n = 1;
-        filter->par_d = 1;
-    }
-    GST_VIDEO_SINK_WIDTH(filter) = width;
-    GST_VIDEO_SINK_HEIGHT(filter) = height;
-
-    // crufty lump - we *always* accept *only* RGBX now.
-    /*
-    filter->format = SLV_PF_UNKNOWN;
-    if (0 == strcmp(llgst_structure_get_name(structure),
-            "video/x-raw-rgb"))
-    {
-        int red_mask;
-        int green_mask;
-        int blue_mask;
-        llgst_structure_get_int(structure, "red_mask", &red_mask);
-        llgst_structure_get_int(structure, "green_mask", &green_mask);
-        llgst_structure_get_int(structure, "blue_mask", &blue_mask);
-        if ((unsigned int)red_mask   == 0xFF000000 &&
-            (unsigned int)green_mask == 0x00FF0000 &&
-            (unsigned int)blue_mask  == 0x0000FF00)
-        {
-            filter->format = SLV_PF_RGBX;
-            //fprintf(stderr, "\n\nPIXEL FORMAT RGB\n\n");
-        } else if ((unsigned int)red_mask   == 0x0000FF00 &&
-               (unsigned int)green_mask == 0x00FF0000 &&
-               (unsigned int)blue_mask  == 0xFF000000)
-        {
-            filter->format = SLV_PF_BGRX;
-            //fprintf(stderr, "\n\nPIXEL FORMAT BGR\n\n");
-        }
-        }*/
-
-    filter->format = SLV_PF_RGBX;
-
-    GST_OBJECT_UNLOCK(filter);
-
-    return TRUE;
-}
-
-
-static gboolean
-gst_slvideo_start (GstBaseSink * bsink)
-{
-    gboolean ret = TRUE;
-
-    GST_SLVIDEO(bsink);
-
-    return ret;
-}
-
-static gboolean
-gst_slvideo_stop (GstBaseSink * bsink)
-{
-    GstSLVideo *slvideo;
-    slvideo = GST_SLVIDEO(bsink);
-
-    // free-up retained frame buffer
-    GST_OBJECT_LOCK(slvideo);
-    slvideo->retained_frame_ready = FALSE;
-    delete[] slvideo->retained_frame_data;
-    slvideo->retained_frame_data = NULL;
-    slvideo->retained_frame_allocbytes = 0;
-    GST_OBJECT_UNLOCK(slvideo);
-
-    return TRUE;
-}
-
-
-static GstFlowReturn
-gst_slvideo_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
-              GstCaps * caps, GstBuffer ** buf)
-{
-    gint width, height;
-    GstStructure *structure = NULL;
-    GstSLVideo *slvideo;
-    slvideo = GST_SLVIDEO(bsink);
-
-    // caps == requested caps
-    // we can ignore these and reverse-negotiate our preferred dimensions with
-    // the peer if we like - we need to do this to obey dynamic resize requests
-    // flowing in from the app.
-    structure = llgst_caps_get_structure (caps, 0);
-    if (!llgst_structure_get_int(structure, "width", &width) ||
-        !llgst_structure_get_int(structure, "height", &height))
-    {
-        GST_WARNING_OBJECT (slvideo, "no width/height in caps %" GST_PTR_FORMAT, caps);
-        return GST_FLOW_NOT_NEGOTIATED;
-    }
-
-    GstBuffer *newbuf = llgst_buffer_new();
-    bool made_bufferdata_ptr = false;
-#define MAXDEPTHHACK 4
-
-    GST_OBJECT_LOCK(slvideo);
-    if (slvideo->resize_forced_always) // app is giving us a fixed size to work with
-    {
-        gint slwantwidth, slwantheight;
-        slwantwidth = slvideo->resize_try_width;
-        slwantheight = slvideo->resize_try_height;
-
-        if (slwantwidth != width ||
-            slwantheight != height)
-        {
-            // don't like requested caps, we will issue our own suggestion - copy
-            // the requested caps but substitute our own width and height and see
-            // if our peer is happy with that.
-
-            GstCaps *desired_caps;
-            GstStructure *desired_struct;
-            desired_caps = llgst_caps_copy (caps);
-            desired_struct = llgst_caps_get_structure (desired_caps, 0);
-
-            GValue value = {0};
-            g_value_init(&value, G_TYPE_INT);
-            g_value_set_int(&value, slwantwidth);
-            llgst_structure_set_value (desired_struct, "width", &value);
-            g_value_unset(&value);
-            g_value_init(&value, G_TYPE_INT);
-            g_value_set_int(&value, slwantheight);
-            llgst_structure_set_value (desired_struct, "height", &value);
-
-            if (llgst_pad_peer_accept_caps (GST_VIDEO_SINK_PAD (slvideo),
-                            desired_caps))
-            {
-                // todo: re-use buffers from a pool?
-                // todo: set MALLOCDATA to null, set DATA to point straight to shm?
-
-                // peer likes our cap suggestion
-                DEBUGMSG("peer loves us :)");
-                GST_BUFFER_SIZE(newbuf) = slwantwidth * slwantheight * MAXDEPTHHACK;
-                GST_BUFFER_MALLOCDATA(newbuf) = (guint8*)g_malloc(GST_BUFFER_SIZE(newbuf));
-                GST_BUFFER_DATA(newbuf) = GST_BUFFER_MALLOCDATA(newbuf);
-                llgst_buffer_set_caps (GST_BUFFER_CAST(newbuf), desired_caps);
-
-                made_bufferdata_ptr = true;
-            } else {
-                // peer hates our cap suggestion
-                INFOMSG("peer hates us :(");
-                llgst_caps_unref(desired_caps);
-            }
-        }
-    }
-
-    GST_OBJECT_UNLOCK(slvideo);
-
-    if (!made_bufferdata_ptr) // need to fallback to malloc at original size
-    {
-        GST_BUFFER_SIZE(newbuf) = width * height * MAXDEPTHHACK;
-        GST_BUFFER_MALLOCDATA(newbuf) = (guint8*)g_malloc(GST_BUFFER_SIZE(newbuf));
-        GST_BUFFER_DATA(newbuf) = GST_BUFFER_MALLOCDATA(newbuf);
-        llgst_buffer_set_caps (GST_BUFFER_CAST(newbuf), caps);
-    }
-
-    *buf = GST_BUFFER_CAST(newbuf);
-
-    return GST_FLOW_OK;
-}
-
-
-/* initialize the plugin's class */
-static void
-gst_slvideo_class_init (GstSLVideoClass * klass)
-{
-    GObjectClass *gobject_class;
-    GstElementClass *gstelement_class;
-    GstBaseSinkClass *gstbasesink_class;
-
-    gobject_class = (GObjectClass *) klass;
-    gstelement_class = (GstElementClass *) klass;
-    gstbasesink_class = (GstBaseSinkClass *) klass;
-
-    gobject_class->finalize = gst_slvideo_finalize;
-    gobject_class->set_property = gst_slvideo_set_property;
-    gobject_class->get_property = gst_slvideo_get_property;
-
-    gstelement_class->change_state = gst_slvideo_change_state;
-
-#define LLGST_DEBUG_FUNCPTR(p) (p)
-    gstbasesink_class->get_caps = LLGST_DEBUG_FUNCPTR (gst_slvideo_get_caps);
-    gstbasesink_class->set_caps = LLGST_DEBUG_FUNCPTR( gst_slvideo_set_caps);
-    gstbasesink_class->buffer_alloc=LLGST_DEBUG_FUNCPTR(gst_slvideo_buffer_alloc);
-    //gstbasesink_class->get_times = LLGST_DEBUG_FUNCPTR (gst_slvideo_get_times);
-    gstbasesink_class->preroll = LLGST_DEBUG_FUNCPTR (gst_slvideo_show_frame);
-    gstbasesink_class->render = LLGST_DEBUG_FUNCPTR (gst_slvideo_show_frame);
-
-    gstbasesink_class->start = LLGST_DEBUG_FUNCPTR (gst_slvideo_start);
-    gstbasesink_class->stop = LLGST_DEBUG_FUNCPTR (gst_slvideo_stop);
-
-    //  gstbasesink_class->unlock = LLGST_DEBUG_FUNCPTR (gst_slvideo_unlock);
-#undef LLGST_DEBUG_FUNCPTR
-}
-
-
-/* initialize the new element
- * instantiate pads and add them to element
- * set functions
- * initialize structure
- */
-static void
-gst_slvideo_init (GstSLVideo * filter,
-          GstSLVideoClass * gclass)
-{
-    filter->caps = NULL;
-    filter->width = -1;
-    filter->height = -1;
-
-    // this is the info we share with the client app
-    GST_OBJECT_LOCK(filter);
-    filter->retained_frame_ready = FALSE;
-    filter->retained_frame_data = NULL;
-    filter->retained_frame_allocbytes = 0;
-    filter->retained_frame_width = filter->width;
-    filter->retained_frame_height = filter->height;
-    filter->retained_frame_format = SLV_PF_UNKNOWN;
-    GstCaps *caps = llgst_caps_from_string (SLV_ALLCAPS);
-    llgst_caps_replace (&filter->caps, caps);
-    filter->resize_forced_always = false;
-    filter->resize_try_width = -1;
-    filter->resize_try_height = -1;
-    GST_OBJECT_UNLOCK(filter);
-}
-
-static void
-gst_slvideo_set_property (GObject * object, guint prop_id,
-              const GValue * value, GParamSpec * pspec)
-{
-    llg_return_if_fail (GST_IS_SLVIDEO (object));
-
-    switch (prop_id) {
-    default:
-        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-        break;
-    }
-}
-
-static void
-gst_slvideo_get_property (GObject * object, guint prop_id,
-              GValue * value, GParamSpec * pspec)
-{
-    llg_return_if_fail (GST_IS_SLVIDEO (object));
-
-    switch (prop_id) {
-    default:
-        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-        break;
-    }
-}
-
-
-/* entry point to initialize the plug-in
- * initialize the plug-in itself
- * register the element factories and pad templates
- * register the features
- */
-static gboolean
-plugin_init (GstPlugin * plugin)
-{
-    DEBUGMSG("PLUGIN INIT");
-
-    GST_DEBUG_CATEGORY_INIT (gst_slvideo_debug, (gchar*)"private-slvideo-plugin",
-                 0, (gchar*)"Second Life Video Sink");
-
-    return llgst_element_register (plugin, "private-slvideo",
-                       GST_RANK_NONE, GST_TYPE_SLVIDEO);
-}
-
-/* this is the structure that gstreamer looks for to register plugins
- */
-/* NOTE: Can't rely upon GST_PLUGIN_DEFINE_STATIC to self-register, since
-   some g++ versions buggily avoid __attribute__((constructor)) functions -
-   so we provide an explicit plugin init function.
- */
-#define PACKAGE (gchar*)"packagehack"
-// this macro quietly refers to PACKAGE internally
-GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
-           GST_VERSION_MINOR,
-           (gchar*)"private-slvideoplugin",
-           (gchar*)"SL Video sink plugin",
-           plugin_init, (gchar*)"1.0", (gchar*)"LGPL",
-           (gchar*)"Second Life",
-           (gchar*)"http://www.secondlife.com/");
-#undef PACKAGE
-void gst_slvideo_init_class (void)
-{
-    ll_gst_plugin_register_static (&gst_plugin_desc);
-    DEBUGMSG("CLASS INIT");
-}
-
-#endif // LL_GSTREAMER010_ENABLED
diff --git a/indra/media_plugins/gstreamer010/llmediaimplgstreamervidplug.h b/indra/media_plugins/gstreamer010/llmediaimplgstreamervidplug.h
deleted file mode 100644
index d4e07daf4f..0000000000
--- a/indra/media_plugins/gstreamer010/llmediaimplgstreamervidplug.h
+++ /dev/null
@@ -1,105 +0,0 @@
-/**
- * @file llmediaimplgstreamervidplug.h
- * @brief Video-consuming static GStreamer plugin for gst-to-LLMediaImpl
- *
- * @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
- */
-
-#ifndef __GST_SLVIDEO_H__
-#define __GST_SLVIDEO_H__
-
-#if LL_GSTREAMER010_ENABLED
-
-extern "C" {
-#include <gst/gst.h>
-#include <gst/video/video.h>
-#include <gst/video/gstvideosink.h>
-}
-
-G_BEGIN_DECLS
-
-/* #defines don't like whitespacey bits */
-#define GST_TYPE_SLVIDEO \
-  (gst_slvideo_get_type())
-#define GST_SLVIDEO(obj) \
-  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SLVIDEO,GstSLVideo))
-#define GST_SLVIDEO_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SLVIDEO,GstSLVideoClass))
-#define GST_IS_SLVIDEO(obj) \
-  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SLVIDEO))
-#define GST_IS_SLVIDEO_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SLVIDEO))
-
-typedef struct _GstSLVideo      GstSLVideo;
-typedef struct _GstSLVideoClass GstSLVideoClass;
-
-typedef enum {
-    SLV_PF_UNKNOWN = 0,
-    SLV_PF_RGBX    = 1,
-    SLV_PF_BGRX    = 2,
-    SLV__END       = 3
-} SLVPixelFormat;
-const int SLVPixelFormatBytes[SLV__END] = {1, 4, 4};
-
-struct _GstSLVideo
-{
-    GstVideoSink video_sink;
-
-    GstCaps *caps;
-
-    int fps_n, fps_d;
-    int par_n, par_d;
-    int height, width;
-    SLVPixelFormat format;
-
-    // SHARED WITH APPLICATION:
-    // Access to the following should be protected by GST_OBJECT_LOCK() on
-    // the GstSLVideo object, and should be totally consistent upon UNLOCK
-    // (i.e. all written at once to reflect the current retained frame info
-    // when the retained frame is updated.)
-    bool retained_frame_ready; // new frame ready since flag last reset. (*TODO: could get the writer to wait on a semaphore instead of having the reader poll, potentially making dropped frames somewhat cheaper.)
-    unsigned char*  retained_frame_data;
-    int retained_frame_allocbytes;
-    int retained_frame_width, retained_frame_height;
-    SLVPixelFormat retained_frame_format;
-    // sticky resize info
-    bool resize_forced_always;
-    int resize_try_width;
-    int resize_try_height;
-};
-
-struct _GstSLVideoClass
-{
-    GstVideoSinkClass parent_class;
-};
-
-GType gst_slvideo_get_type (void);
-
-void gst_slvideo_init_class (void);
-
-G_END_DECLS
-
-#endif // LL_GSTREAMER010_ENABLED
-
-#endif /* __GST_SLVIDEO_H__ */
diff --git a/indra/media_plugins/gstreamer010/media_plugin_gstreamer010.cpp b/indra/media_plugins/gstreamer010/media_plugin_gstreamer010.cpp
deleted file mode 100644
index 97d1d7d7b5..0000000000
--- a/indra/media_plugins/gstreamer010/media_plugin_gstreamer010.cpp
+++ /dev/null
@@ -1,1266 +0,0 @@
-/**
- * @file media_plugin_gstreamer010.cpp
- * @brief GStreamer-0.10 plugin for LLMedia API plugin system
- *
- * @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 "linden_common.h"
-
-#include "llgl.h"
-
-#include "llplugininstance.h"
-#include "llpluginmessage.h"
-#include "llpluginmessageclasses.h"
-#include "media_plugin_base.h"
-
-#if LL_GSTREAMER010_ENABLED
-
-extern "C" {
-#include <gst/gst.h>
-}
-
-#include "llmediaimplgstreamer.h"
-#include "llmediaimplgstreamertriviallogging.h"
-
-#include "llmediaimplgstreamervidplug.h"
-
-#include "llmediaimplgstreamer_syms.h"
-
-//////////////////////////////////////////////////////////////////////////////
-//
-class MediaPluginGStreamer010 : public MediaPluginBase
-{
-public:
-    MediaPluginGStreamer010(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data);
-    ~MediaPluginGStreamer010();
-
-    /* virtual */ void receiveMessage(const char *message_string);
-
-    static bool startup();
-    static bool closedown();
-
-    gboolean processGSTEvents(GstBus     *bus,
-                  GstMessage *message);
-
-private:
-    std::string getVersion();
-    bool navigateTo( const std::string urlIn );
-    bool seek( double time_sec );
-    bool setVolume( float volume );
-
-    // misc
-    bool pause();
-    bool stop();
-    bool play(double rate);
-    bool getTimePos(double &sec_out);
-
-    static const double MIN_LOOP_SEC = 1.0F;
-
-    bool mIsLooping;
-
-    enum ECommand {
-        COMMAND_NONE,
-        COMMAND_STOP,
-        COMMAND_PLAY,
-        COMMAND_FAST_FORWARD,
-        COMMAND_FAST_REWIND,
-        COMMAND_PAUSE,
-        COMMAND_SEEK,
-    };
-    ECommand mCommand;
-
-private:
-    bool unload();
-    bool load();
-
-    bool update(int milliseconds);
-        void mouseDown( int x, int y );
-        void mouseUp( int x, int y );
-        void mouseMove( int x, int y );
-
-        void sizeChanged();
-
-    static bool mDoneInit;
-
-    guint mBusWatchID;
-
-    float mVolume;
-
-    int mDepth;
-
-    // media NATURAL size
-    int mNaturalWidth;
-    int mNaturalHeight;
-    // media current size
-    int mCurrentWidth;
-    int mCurrentHeight;
-    int mCurrentRowbytes;
-      // previous media size so we can detect changes
-      int mPreviousWidth;
-      int mPreviousHeight;
-    // desired render size from host
-    int mWidth;
-    int mHeight;
-    // padded texture size we need to write into
-    int mTextureWidth;
-    int mTextureHeight;
-
-    int mTextureFormatPrimary;
-    int mTextureFormatType;
-
-    bool mSeekWanted;
-    double mSeekDestination;
-
-    // Very GStreamer-specific
-    GMainLoop *mPump; // event pump for this media
-    GstElement *mPlaybin;
-    GstElement *mVisualizer;
-    GstSLVideo *mVideoSink;
-};
-
-//static
-bool MediaPluginGStreamer010::mDoneInit = false;
-
-MediaPluginGStreamer010::MediaPluginGStreamer010(
-    LLPluginInstance::sendMessageFunction host_send_func,
-    void *host_user_data ) :
-    MediaPluginBase(host_send_func, host_user_data),
-    mBusWatchID ( 0 ),
-    mCurrentRowbytes ( 4 ),
-    mTextureFormatPrimary ( GL_RGBA ),
-    mTextureFormatType ( GL_UNSIGNED_INT_8_8_8_8_REV ),
-    mSeekWanted(false),
-    mSeekDestination(0.0),
-    mPump ( NULL ),
-    mPlaybin ( NULL ),
-    mVisualizer ( NULL ),
-    mVideoSink ( NULL ),
-    mCommand ( COMMAND_NONE )
-{
-    std::ostringstream str;
-    INFOMSG("MediaPluginGStreamer010 constructor - my PID=%u", U32(getpid()));
-}
-
-///////////////////////////////////////////////////////////////////////////////
-//
-//#define LL_GST_REPORT_STATE_CHANGES
-#ifdef LL_GST_REPORT_STATE_CHANGES
-static char* get_gst_state_name(GstState state)
-{
-    switch (state) {
-    case GST_STATE_VOID_PENDING: return "VOID_PENDING";
-    case GST_STATE_NULL: return "NULL";
-    case GST_STATE_READY: return "READY";
-    case GST_STATE_PAUSED: return "PAUSED";
-    case GST_STATE_PLAYING: return "PLAYING";
-    }
-    return "(unknown)";
-}
-#endif // LL_GST_REPORT_STATE_CHANGES
-
-gboolean
-MediaPluginGStreamer010::processGSTEvents(GstBus     *bus,
-                      GstMessage *message)
-{
-    if (!message)
-        return TRUE; // shield against GStreamer bug
-
-    if (GST_MESSAGE_TYPE(message) != GST_MESSAGE_STATE_CHANGED &&
-        GST_MESSAGE_TYPE(message) != GST_MESSAGE_BUFFERING)
-    {
-        DEBUGMSG("Got GST message type: %s",
-            LLGST_MESSAGE_TYPE_NAME (message));
-    }
-    else
-    {
-        // TODO: grok 'duration' message type
-        DEBUGMSG("Got GST message type: %s",
-             LLGST_MESSAGE_TYPE_NAME (message));
-    }
-
-    switch (GST_MESSAGE_TYPE (message)) {
-    case GST_MESSAGE_BUFFERING: {
-        // NEEDS GST 0.10.11+
-        if (llgst_message_parse_buffering)
-        {
-            gint percent = 0;
-            llgst_message_parse_buffering(message, &percent);
-            DEBUGMSG("GST buffering: %d%%", percent);
-        }
-        break;
-    }
-    case GST_MESSAGE_STATE_CHANGED: {
-        GstState old_state;
-        GstState new_state;
-        GstState pending_state;
-        llgst_message_parse_state_changed(message,
-                        &old_state,
-                        &new_state,
-                        &pending_state);
-#ifdef LL_GST_REPORT_STATE_CHANGES
-        // not generally very useful, and rather spammy.
-        DEBUGMSG("state change (old,<new>,pending): %s,<%s>,%s",
-             get_gst_state_name(old_state),
-             get_gst_state_name(new_state),
-             get_gst_state_name(pending_state));
-#endif // LL_GST_REPORT_STATE_CHANGES
-
-        switch (new_state) {
-        case GST_STATE_VOID_PENDING:
-            break;
-        case GST_STATE_NULL:
-            break;
-        case GST_STATE_READY:
-            setStatus(STATUS_LOADED);
-            break;
-        case GST_STATE_PAUSED:
-            setStatus(STATUS_PAUSED);
-            break;
-        case GST_STATE_PLAYING:
-            setStatus(STATUS_PLAYING);
-            break;
-        }
-        break;
-    }
-    case GST_MESSAGE_ERROR: {
-        GError *err = NULL;
-        gchar *debug = NULL;
-
-        llgst_message_parse_error (message, &err, &debug);
-        WARNMSG("GST error: %s", err?err->message:"(unknown)");
-        if (err)
-            g_error_free (err);
-        g_free (debug);
-
-        mCommand = COMMAND_STOP;
-
-        setStatus(STATUS_ERROR);
-
-        break;
-    }
-    case GST_MESSAGE_INFO: {
-        if (llgst_message_parse_info)
-        {
-            GError *err = NULL;
-            gchar *debug = NULL;
-
-            llgst_message_parse_info (message, &err, &debug);
-            INFOMSG("GST info: %s", err?err->message:"(unknown)");
-            if (err)
-                g_error_free (err);
-            g_free (debug);
-        }
-        break;
-    }
-    case GST_MESSAGE_WARNING: {
-        GError *err = NULL;
-        gchar *debug = NULL;
-
-        llgst_message_parse_warning (message, &err, &debug);
-        WARNMSG("GST warning: %s", err?err->message:"(unknown)");
-        if (err)
-            g_error_free (err);
-        g_free (debug);
-
-        break;
-    }
-    case GST_MESSAGE_EOS:
-        /* end-of-stream */
-        DEBUGMSG("GST end-of-stream.");
-        if (mIsLooping)
-        {
-            DEBUGMSG("looping media...");
-            double eos_pos_sec = 0.0F;
-            bool got_eos_position = getTimePos(eos_pos_sec);
-
-            if (got_eos_position && eos_pos_sec < MIN_LOOP_SEC)
-            {
-                // if we know that the movie is really short, don't
-                // loop it else it can easily become a time-hog
-                // because of GStreamer spin-up overhead
-                DEBUGMSG("really short movie (%0.3fsec) - not gonna loop this, pausing instead.", eos_pos_sec);
-                // inject a COMMAND_PAUSE
-                mCommand = COMMAND_PAUSE;
-            }
-            else
-            {
-#undef LLGST_LOOP_BY_SEEKING
-// loop with a stop-start instead of a seek, because it actually seems rather
-// faster than seeking on remote streams.
-#ifdef LLGST_LOOP_BY_SEEKING
-                // first, try looping by an explicit rewind
-                bool seeksuccess = seek(0.0);
-                if (seeksuccess)
-                {
-                    play(1.0);
-                }
-                else
-#endif // LLGST_LOOP_BY_SEEKING
-                {  // use clumsy stop-start to loop
-                    DEBUGMSG("didn't loop by rewinding - stopping and starting instead...");
-                    stop();
-                    play(1.0);
-                }
-            }
-        }
-        else // not a looping media
-        {
-            // inject a COMMAND_STOP
-            mCommand = COMMAND_STOP;
-        }
-        break;
-    default:
-        /* unhandled message */
-        break;
-    }
-
-    /* we want to be notified again the next time there is a message
-     * on the bus, so return true (false means we want to stop watching
-     * for messages on the bus and our callback should not be called again)
-     */
-    return TRUE;
-}
-
-extern "C" {
-gboolean
-llmediaimplgstreamer_bus_callback (GstBus     *bus,
-                   GstMessage *message,
-                   gpointer    data)
-{
-    MediaPluginGStreamer010 *impl = (MediaPluginGStreamer010*)data;
-    return impl->processGSTEvents(bus, message);
-}
-} // extern "C"
-
-
-
-bool
-MediaPluginGStreamer010::navigateTo ( const std::string urlIn )
-{
-    if (!mDoneInit)
-        return false; // error
-
-    setStatus(STATUS_LOADING);
-
-    DEBUGMSG("Setting media URI: %s", urlIn.c_str());
-
-    mSeekWanted = false;
-
-    if (NULL == mPump ||
-        NULL == mPlaybin)
-    {
-        setStatus(STATUS_ERROR);
-        return false; // error
-    }
-
-    // set URI
-    g_object_set (G_OBJECT (mPlaybin), "uri", urlIn.c_str(), NULL);
-    //g_object_set (G_OBJECT (mPlaybin), "uri", "file:///tmp/movie", NULL);
-
-    // navigateTo implicitly plays, too.
-    play(1.0);
-
-    return true;
-}
-
-
-bool
-MediaPluginGStreamer010::update(int milliseconds)
-{
-    if (!mDoneInit)
-        return false; // error
-
-    DEBUGMSG("updating media...");
-
-    // sanity check
-    if (NULL == mPump ||
-        NULL == mPlaybin)
-    {
-        DEBUGMSG("dead media...");
-        return false;
-    }
-
-    // see if there's an outstanding seek wanted
-    if (mSeekWanted &&
-        // bleh, GST has to be happy that the movie is really truly playing
-        // or it may quietly ignore the seek (with rtsp:// at least).
-        (GST_STATE(mPlaybin) == GST_STATE_PLAYING))
-    {
-        seek(mSeekDestination);
-        mSeekWanted = false;
-    }
-
-    // *TODO: time-limit - but there isn't a lot we can do here, most
-    // time is spent in gstreamer's own opaque worker-threads.  maybe
-    // we can do something sneaky like only unlock the video object
-    // for 'milliseconds' and otherwise hold the lock.
-    while (g_main_context_pending(g_main_loop_get_context(mPump)))
-    {
-           g_main_context_iteration(g_main_loop_get_context(mPump), FALSE);
-    }
-
-    // check for availability of a new frame
-
-    if (mVideoSink)
-    {
-            GST_OBJECT_LOCK(mVideoSink);
-        if (mVideoSink->retained_frame_ready)
-        {
-            DEBUGMSG("NEW FRAME READY");
-
-            if (mVideoSink->retained_frame_width != mCurrentWidth ||
-                mVideoSink->retained_frame_height != mCurrentHeight)
-                // *TODO: also check for change in format
-            {
-                // just resize container, don't consume frame
-                int neww = mVideoSink->retained_frame_width;
-                int newh = mVideoSink->retained_frame_height;
-
-                int newd = 4;
-                mTextureFormatPrimary = GL_RGBA;
-                mTextureFormatType = GL_UNSIGNED_INT_8_8_8_8_REV;
-
-                /*
-                int newd = SLVPixelFormatBytes[mVideoSink->retained_frame_format];
-                if (SLV_PF_BGRX == mVideoSink->retained_frame_format)
-                {
-                    mTextureFormatPrimary = GL_BGRA;
-                    mTextureFormatType = GL_UNSIGNED_INT_8_8_8_8_REV;
-                }
-                else
-                {
-                    mTextureFormatPrimary = GL_RGBA;
-                    mTextureFormatType = GL_UNSIGNED_INT_8_8_8_8_REV;
-                }
-                */
-
-                GST_OBJECT_UNLOCK(mVideoSink);
-
-                mCurrentRowbytes = neww * newd;
-                DEBUGMSG("video container resized to %dx%d",
-                     neww, newh);
-
-                mDepth = newd;
-                mCurrentWidth = neww;
-                mCurrentHeight = newh;
-                sizeChanged();
-                return true;
-            }
-
-            if (mPixels &&
-                mCurrentHeight <= mHeight &&
-                mCurrentWidth <= mWidth &&
-                !mTextureSegmentName.empty())
-            {
-                // we're gonna totally consume this frame - reset 'ready' flag
-                mVideoSink->retained_frame_ready = FALSE;
-                int destination_rowbytes = mWidth * mDepth;
-                for (int row=0; row<mCurrentHeight; ++row)
-                {
-                    memcpy(&mPixels
-                            [destination_rowbytes * row],
-                           &mVideoSink->retained_frame_data
-                            [mCurrentRowbytes * row],
-                           mCurrentRowbytes);
-                }
-
-                GST_OBJECT_UNLOCK(mVideoSink);
-                DEBUGMSG("NEW FRAME REALLY TRULY CONSUMED, TELLING HOST");
-
-                setDirty(0,0,mCurrentWidth,mCurrentHeight);
-            }
-            else
-            {
-                // new frame ready, but we're not ready to
-                // consume it.
-
-                GST_OBJECT_UNLOCK(mVideoSink);
-
-                DEBUGMSG("NEW FRAME not consumed, still waiting for a shm segment and/or shm resize");
-            }
-
-            return true;
-        }
-        else
-        {
-            // nothing to do yet.
-            GST_OBJECT_UNLOCK(mVideoSink);
-            return true;
-        }
-    }
-
-    return true;
-}
-
-
-void
-MediaPluginGStreamer010::mouseDown( int x, int y )
-{
-  // do nothing
-}
-
-void
-MediaPluginGStreamer010::mouseUp( int x, int y )
-{
-  // do nothing
-}
-
-void
-MediaPluginGStreamer010::mouseMove( int x, int y )
-{
-  // do nothing
-}
-
-
-bool
-MediaPluginGStreamer010::pause()
-{
-    DEBUGMSG("pausing media...");
-    // todo: error-check this?
-    if (mDoneInit && mPlaybin)
-    {
-        llgst_element_set_state(mPlaybin, GST_STATE_PAUSED);
-        return true;
-    }
-    return false;
-}
-
-bool
-MediaPluginGStreamer010::stop()
-{
-    DEBUGMSG("stopping media...");
-    // todo: error-check this?
-    if (mDoneInit && mPlaybin)
-    {
-        llgst_element_set_state(mPlaybin, GST_STATE_READY);
-        return true;
-    }
-    return false;
-}
-
-bool
-MediaPluginGStreamer010::play(double rate)
-{
-    // NOTE: we don't actually support non-natural rate.
-
-        DEBUGMSG("playing media... rate=%f", rate);
-    // todo: error-check this?
-    if (mDoneInit && mPlaybin)
-    {
-        llgst_element_set_state(mPlaybin, GST_STATE_PLAYING);
-        return true;
-    }
-    return false;
-}
-
-bool
-MediaPluginGStreamer010::setVolume( float volume )
-{
-    // we try to only update volume as conservatively as
-    // possible, as many gst-plugins-base versions up to at least
-    // November 2008 have critical race-conditions in setting volume - sigh
-    if (mVolume == volume)
-        return true; // nothing to do, everything's fine
-
-    mVolume = volume;
-    if (mDoneInit && mPlaybin)
-    {
-        g_object_set(mPlaybin, "volume", mVolume, NULL);
-        return true;
-    }
-
-    return false;
-}
-
-bool
-MediaPluginGStreamer010::seek(double time_sec)
-{
-    bool success = false;
-    if (mDoneInit && mPlaybin)
-    {
-        success = llgst_element_seek(mPlaybin, 1.0F, GST_FORMAT_TIME,
-                GstSeekFlags(GST_SEEK_FLAG_FLUSH |
-                         GST_SEEK_FLAG_KEY_UNIT),
-                GST_SEEK_TYPE_SET, gint64(time_sec*GST_SECOND),
-                GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
-    }
-    DEBUGMSG("MEDIA SEEK REQUEST to %fsec result was %d",
-         float(time_sec), int(success));
-    return success;
-}
-
-bool
-MediaPluginGStreamer010::getTimePos(double &sec_out)
-{
-    bool got_position = false;
-    if (mDoneInit && mPlaybin)
-    {
-        gint64 pos;
-        GstFormat timefmt = GST_FORMAT_TIME;
-        got_position =
-            llgst_element_query_position &&
-            llgst_element_query_position(mPlaybin,
-                             &timefmt,
-                             &pos);
-        got_position = got_position
-            && (timefmt == GST_FORMAT_TIME);
-        // GStreamer may have other ideas, but we consider the current position
-        // undefined if not PLAYING or PAUSED
-        got_position = got_position &&
-            (GST_STATE(mPlaybin) == GST_STATE_PLAYING ||
-             GST_STATE(mPlaybin) == GST_STATE_PAUSED);
-        if (got_position && !GST_CLOCK_TIME_IS_VALID(pos))
-        {
-            if (GST_STATE(mPlaybin) == GST_STATE_PLAYING)
-            {
-                // if we're playing then we treat an invalid clock time
-                // as 0, for complicated reasons (insert reason here)
-                pos = 0;
-            }
-            else
-            {
-                got_position = false;
-            }
-
-        }
-        // If all the preconditions succeeded... we can trust the result.
-        if (got_position)
-        {
-            sec_out = double(pos) / double(GST_SECOND); // gst to sec
-        }
-    }
-    return got_position;
-}
-
-bool
-MediaPluginGStreamer010::load()
-{
-    if (!mDoneInit)
-        return false; // error
-
-    setStatus(STATUS_LOADING);
-
-    DEBUGMSG("setting up media...");
-
-    mIsLooping = false;
-    mVolume = 0.1234567; // minor hack to force an initial volume update
-
-    // Create a pumpable main-loop for this media
-    mPump = g_main_loop_new (NULL, FALSE);
-    if (!mPump)
-    {
-        setStatus(STATUS_ERROR);
-        return false; // error
-    }
-
-    // instantiate a playbin element to do the hard work
-    mPlaybin = llgst_element_factory_make ("playbin", "play");
-    if (!mPlaybin)
-    {
-        setStatus(STATUS_ERROR);
-        return false; // error
-    }
-
-    // get playbin's bus
-    GstBus *bus = llgst_pipeline_get_bus (GST_PIPELINE (mPlaybin));
-    if (!bus)
-    {
-        setStatus(STATUS_ERROR);
-        return false; // error
-    }
-    mBusWatchID = llgst_bus_add_watch (bus,
-                       llmediaimplgstreamer_bus_callback,
-                       this);
-    llgst_object_unref (bus);
-
-#if 0 // not quite stable/correct yet
-    // get a visualizer element (bonus feature!)
-    char* vis_name = getenv("LL_GST_VIS_NAME");
-    if (!vis_name ||
-        (vis_name && std::string(vis_name)!="none"))
-    {
-        if (vis_name)
-        {
-            mVisualizer = llgst_element_factory_make (vis_name, "vis");
-        }
-        if (!mVisualizer)
-        {
-            mVisualizer = llgst_element_factory_make ("libvisual_jess", "vis");
-            if (!mVisualizer)
-            {
-                mVisualizer = llgst_element_factory_make ("goom", "vis");
-                if (!mVisualizer)
-                {
-                    mVisualizer = llgst_element_factory_make ("libvisual_lv_scope", "vis");
-                    if (!mVisualizer)
-                    {
-                        // That's okay, we don't NEED this.
-                    }
-                }
-            }
-        }
-    }
-#endif
-
-    if (NULL == getenv("LL_GSTREAMER_EXTERNAL")) {
-        // instantiate a custom video sink
-        mVideoSink =
-            GST_SLVIDEO(llgst_element_factory_make ("private-slvideo", "slvideo"));
-        if (!mVideoSink)
-        {
-            WARNMSG("Could not instantiate private-slvideo element.");
-            // todo: cleanup.
-            setStatus(STATUS_ERROR);
-            return false; // error
-        }
-
-        // connect the pieces
-        g_object_set(mPlaybin, "video-sink", mVideoSink, NULL);
-    }
-
-    if (mVisualizer)
-    {
-        g_object_set(mPlaybin, "vis-plugin", mVisualizer, NULL);
-    }
-
-    return true;
-}
-
-bool
-MediaPluginGStreamer010::unload ()
-{
-    if (!mDoneInit)
-        return false; // error
-
-    DEBUGMSG("unloading media...");
-
-    // stop getting callbacks for this bus
-    g_source_remove(mBusWatchID);
-    mBusWatchID = 0;
-
-    if (mPlaybin)
-    {
-        llgst_element_set_state (mPlaybin, GST_STATE_NULL);
-        llgst_object_unref (GST_OBJECT (mPlaybin));
-        mPlaybin = NULL;
-    }
-
-    if (mVisualizer)
-    {
-        llgst_object_unref (GST_OBJECT (mVisualizer));
-        mVisualizer = NULL;
-    }
-
-    if (mPump)
-    {
-        g_main_loop_quit(mPump);
-        mPump = NULL;
-    }
-
-    mVideoSink = NULL;
-
-    setStatus(STATUS_NONE);
-
-    return true;
-}
-
-
-//static
-bool
-MediaPluginGStreamer010::startup()
-{
-    // first - check if GStreamer is explicitly disabled
-    if (NULL != getenv("LL_DISABLE_GSTREAMER"))
-        return false;
-
-    // only do global GStreamer initialization once.
-    if (!mDoneInit)
-    {
-        g_thread_init(NULL);
-
-        // Init the glib type system - we need it.
-        g_type_init();
-
-        // Get symbols!
-#if LL_DARWIN
-        if (! grab_gst_syms("libgstreamer-0.10.dylib",
-                    "libgstvideo-0.10.dylib") )
-#elseif LL_WINDOWS
-        if (! grab_gst_syms("libgstreamer-0.10.dll",
-                    "libgstvideo-0.10.dll") )
-#else // linux or other ELFy unixoid
-        if (! grab_gst_syms("libgstreamer-0.10.so.0",
-                    "libgstvideo-0.10.so.0") )
-#endif
-        {
-            WARNMSG("Couldn't find suitable GStreamer 0.10 support on this system - video playback disabled.");
-            return false;
-        }
-
-        if (llgst_segtrap_set_enabled)
-        {
-            llgst_segtrap_set_enabled(FALSE);
-        }
-        else
-        {
-            WARNMSG("gst_segtrap_set_enabled() is not available; plugin crashes won't be caught.");
-        }
-
-#if LL_LINUX
-        // Gstreamer tries a fork during init, waitpid-ing on it,
-        // which conflicts with any installed SIGCHLD handler...
-        struct sigaction tmpact, oldact;
-        if (llgst_registry_fork_set_enabled) {
-            // if we can disable SIGCHLD-using forking behaviour,
-            // do it.
-            llgst_registry_fork_set_enabled(false);
-        }
-        else {
-            // else temporarily install default SIGCHLD handler
-            // while GStreamer initialises
-            tmpact.sa_handler = SIG_DFL;
-            sigemptyset( &tmpact.sa_mask );
-            tmpact.sa_flags = SA_SIGINFO;
-            sigaction(SIGCHLD, &tmpact, &oldact);
-        }
-#endif // LL_LINUX
-
-        // Protect against GStreamer resetting the locale, yuck.
-        static std::string saved_locale;
-        saved_locale = setlocale(LC_ALL, NULL);
-
-        // finally, try to initialize GStreamer!
-        GError *err = NULL;
-        gboolean init_gst_success = llgst_init_check(NULL, NULL, &err);
-
-        // restore old locale
-        setlocale(LC_ALL, saved_locale.c_str() );
-
-#if LL_LINUX
-        // restore old SIGCHLD handler
-        if (!llgst_registry_fork_set_enabled)
-            sigaction(SIGCHLD, &oldact, NULL);
-#endif // LL_LINUX
-
-        if (!init_gst_success) // fail
-        {
-            if (err)
-            {
-                WARNMSG("GST init failed: %s", err->message);
-                g_error_free(err);
-            }
-            else
-            {
-                WARNMSG("GST init failed for unspecified reason.");
-            }
-            return false;
-        }
-
-        // Init our custom plugins - only really need do this once.
-        gst_slvideo_init_class();
-
-        mDoneInit = true;
-    }
-
-    return true;
-}
-
-
-void
-MediaPluginGStreamer010::sizeChanged()
-{
-    // the shared writing space has possibly changed size/location/whatever
-
-    // Check to see whether the movie's NATURAL size has been set yet
-    if (1 == mNaturalWidth &&
-        1 == mNaturalHeight)
-    {
-        mNaturalWidth = mCurrentWidth;
-        mNaturalHeight = mCurrentHeight;
-        DEBUGMSG("Media NATURAL size better detected as %dx%d",
-             mNaturalWidth, mNaturalHeight);
-    }
-
-    // if the size has changed then the shm has changed and the app needs telling
-    if (mCurrentWidth != mPreviousWidth ||
-        mCurrentHeight != mPreviousHeight)
-    {
-        mPreviousWidth = mCurrentWidth;
-        mPreviousHeight = mCurrentHeight;
-
-        LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "size_change_request");
-        message.setValue("name", mTextureSegmentName);
-        message.setValueS32("width", mNaturalWidth);
-        message.setValueS32("height", mNaturalHeight);
-        DEBUGMSG("<--- Sending size change request to application with name: '%s' - natural size is %d x %d", mTextureSegmentName.c_str(), mNaturalWidth, mNaturalHeight);
-        sendMessage(message);
-    }
-}
-
-
-
-//static
-bool
-MediaPluginGStreamer010::closedown()
-{
-    if (!mDoneInit)
-        return false; // error
-
-    ungrab_gst_syms();
-
-    mDoneInit = false;
-
-    return true;
-}
-
-MediaPluginGStreamer010::~MediaPluginGStreamer010()
-{
-    DEBUGMSG("MediaPluginGStreamer010 destructor");
-
-    closedown();
-
-    DEBUGMSG("GStreamer010 closing down");
-}
-
-
-std::string
-MediaPluginGStreamer010::getVersion()
-{
-    std::string plugin_version = "GStreamer010 media plugin, GStreamer version ";
-    if (mDoneInit &&
-        llgst_version)
-    {
-        guint major, minor, micro, nano;
-        llgst_version(&major, &minor, &micro, &nano);
-        plugin_version += llformat("%u.%u.%u.%u (runtime), %u.%u.%u.%u (headers)", (unsigned int)major, (unsigned int)minor, (unsigned int)micro, (unsigned int)nano, (unsigned int)GST_VERSION_MAJOR, (unsigned int)GST_VERSION_MINOR, (unsigned int)GST_VERSION_MICRO, (unsigned int)GST_VERSION_NANO);
-    }
-    else
-    {
-        plugin_version += "(unknown)";
-    }
-    return plugin_version;
-}
-
-void MediaPluginGStreamer010::receiveMessage(const char *message_string)
-{
-    //std::cerr << "MediaPluginGStreamer010::receiveMessage: received message: \"" << message_string << "\"" << std::endl;
-
-    LLPluginMessage message_in;
-
-    if(message_in.parse(message_string) >= 0)
-    {
-        std::string message_class = message_in.getClass();
-        std::string message_name = message_in.getName();
-        if(message_class == LLPLUGIN_MESSAGE_CLASS_BASE)
-        {
-            if(message_name == "init")
-            {
-                LLPluginMessage message("base", "init_response");
-                LLSD versions = LLSD::emptyMap();
-                versions[LLPLUGIN_MESSAGE_CLASS_BASE] = LLPLUGIN_MESSAGE_CLASS_BASE_VERSION;
-                versions[LLPLUGIN_MESSAGE_CLASS_MEDIA] = LLPLUGIN_MESSAGE_CLASS_MEDIA_VERSION;
-                versions[LLPLUGIN_MESSAGE_CLASS_MEDIA_TIME] = LLPLUGIN_MESSAGE_CLASS_MEDIA_TIME_VERSION;
-                message.setValueLLSD("versions", versions);
-
-                if ( load() )
-                {
-                    DEBUGMSG("GStreamer010 media instance set up");
-                }
-                else
-                {
-                    WARNMSG("GStreamer010 media instance failed to set up");
-                }
-
-                message.setValue("plugin_version", getVersion());
-                sendMessage(message);
-            }
-            else if(message_name == "idle")
-            {
-                // no response is necessary here.
-                double time = message_in.getValueReal("time");
-
-                // Convert time to milliseconds for update()
-                update((int)(time * 1000.0f));
-            }
-            else if(message_name == "cleanup")
-            {
-                unload();
-                closedown();
-            }
-            else if(message_name == "shm_added")
-            {
-                SharedSegmentInfo info;
-                info.mAddress = message_in.getValuePointer("address");
-                info.mSize = (size_t)message_in.getValueS32("size");
-                std::string name = message_in.getValue("name");
-
-                std::ostringstream str;
-                INFOMSG("MediaPluginGStreamer010::receiveMessage: shared memory added, name: %s, size: %d, address: %p", name.c_str(), int(info.mSize), info.mAddress);
-
-                mSharedSegments.insert(SharedSegmentMap::value_type(name, info));
-            }
-            else if(message_name == "shm_remove")
-            {
-                std::string name = message_in.getValue("name");
-
-                DEBUGMSG("MediaPluginGStreamer010::receiveMessage: shared memory remove, name = %s", name.c_str());
-
-                SharedSegmentMap::iterator iter = mSharedSegments.find(name);
-                if(iter != mSharedSegments.end())
-                {
-                    if(mPixels == iter->second.mAddress)
-                    {
-                        // This is the currently active pixel buffer.  Make sure we stop drawing to it.
-                        mPixels = NULL;
-                        mTextureSegmentName.clear();
-
-                        // Make sure the movie decoder is no longer pointed at the shared segment.
-                        sizeChanged();
-                    }
-                    mSharedSegments.erase(iter);
-                }
-                else
-                {
-                    WARNMSG("MediaPluginGStreamer010::receiveMessage: unknown shared memory region!");
-                }
-
-                // Send the response so it can be cleaned up.
-                LLPluginMessage message("base", "shm_remove_response");
-                message.setValue("name", name);
-                sendMessage(message);
-            }
-            else
-            {
-                std::ostringstream str;
-                INFOMSG("MediaPluginGStreamer010::receiveMessage: unknown base message: %s", message_name.c_str());
-            }
-        }
-        else if(message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA)
-        {
-            if(message_name == "init")
-            {
-                // Plugin gets to decide the texture parameters to use.
-                LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params");
-                // lame to have to decide this now, it depends on the movie.  Oh well.
-                mDepth = 4;
-
-                mCurrentWidth = 1;
-                mCurrentHeight = 1;
-                mPreviousWidth = 1;
-                mPreviousHeight = 1;
-                mNaturalWidth = 1;
-                mNaturalHeight = 1;
-                mWidth = 1;
-                mHeight = 1;
-                mTextureWidth = 1;
-                mTextureHeight = 1;
-
-                message.setValueU32("format", GL_RGBA);
-                message.setValueU32("type", GL_UNSIGNED_INT_8_8_8_8_REV);
-
-                message.setValueS32("depth", mDepth);
-                message.setValueS32("default_width", mWidth);
-                message.setValueS32("default_height", mHeight);
-                message.setValueU32("internalformat", GL_RGBA8);
-                message.setValueBoolean("coords_opengl", true); // true == use OpenGL-style coordinates, false == (0,0) is upper left.
-                message.setValueBoolean("allow_downsample", true); // we respond with grace and performance if asked to downscale
-                sendMessage(message);
-            }
-            else if(message_name == "size_change")
-            {
-                std::string name = message_in.getValue("name");
-                S32 width = message_in.getValueS32("width");
-                S32 height = message_in.getValueS32("height");
-                S32 texture_width = message_in.getValueS32("texture_width");
-                S32 texture_height = message_in.getValueS32("texture_height");
-
-                std::ostringstream str;
-                INFOMSG("---->Got size change instruction from application with shm name: %s - size is %d x %d", name.c_str(), width, height);
-
-                LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "size_change_response");
-                message.setValue("name", name);
-                message.setValueS32("width", width);
-                message.setValueS32("height", height);
-                message.setValueS32("texture_width", texture_width);
-                message.setValueS32("texture_height", texture_height);
-                sendMessage(message);
-
-                if(!name.empty())
-                {
-                    // Find the shared memory region with this name
-                    SharedSegmentMap::iterator iter = mSharedSegments.find(name);
-                    if(iter != mSharedSegments.end())
-                    {
-                        INFOMSG("*** Got size change with matching shm, new size is %d x %d", width, height);
-                        INFOMSG("*** Got size change with matching shm, texture size size is %d x %d", texture_width, texture_height);
-
-                        mPixels = (unsigned char*)iter->second.mAddress;
-                        mTextureSegmentName = name;
-                        mWidth = width;
-                        mHeight = height;
-
-                        if (texture_width > 1 ||
-                            texture_height > 1) // not a dummy size from the app, a real explicit forced size
-                        {
-                            INFOMSG("**** = REAL RESIZE REQUEST FROM APP");
-
-                            GST_OBJECT_LOCK(mVideoSink);
-                            mVideoSink->resize_forced_always = true;
-                            mVideoSink->resize_try_width = texture_width;
-                            mVideoSink->resize_try_height = texture_height;
-                            GST_OBJECT_UNLOCK(mVideoSink);
-                        }
-
-                        mTextureWidth = texture_width;
-                        mTextureHeight = texture_height;
-                    }
-                }
-            }
-            else if(message_name == "load_uri")
-            {
-                std::string uri = message_in.getValue("uri");
-                navigateTo( uri );
-                sendStatus();
-            }
-            else if(message_name == "mouse_event")
-            {
-                std::string event = message_in.getValue("event");
-                S32 x = message_in.getValueS32("x");
-                S32 y = message_in.getValueS32("y");
-
-                if(event == "down")
-                {
-                    mouseDown(x, y);
-                }
-                else if(event == "up")
-                {
-                    mouseUp(x, y);
-                }
-                else if(event == "move")
-                {
-                    mouseMove(x, y);
-                };
-            };
-        }
-        else if(message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA_TIME)
-        {
-            if(message_name == "stop")
-            {
-                stop();
-            }
-            else if(message_name == "start")
-            {
-                double rate = 0.0;
-                if(message_in.hasValue("rate"))
-                {
-                    rate = message_in.getValueReal("rate");
-                }
-                // NOTE: we don't actually support rate.
-                play(rate);
-            }
-            else if(message_name == "pause")
-            {
-                pause();
-            }
-            else if(message_name == "seek")
-            {
-                double time = message_in.getValueReal("time");
-                // defer the actual seek in case we haven't
-                // really truly started yet in which case there
-                // is nothing to seek upon
-                mSeekWanted = true;
-                mSeekDestination = time;
-            }
-            else if(message_name == "set_loop")
-            {
-                bool loop = message_in.getValueBoolean("loop");
-                mIsLooping = loop;
-            }
-            else if(message_name == "set_volume")
-            {
-                double volume = message_in.getValueReal("volume");
-                setVolume(volume);
-            }
-        }
-        else
-        {
-            INFOMSG("MediaPluginGStreamer010::receiveMessage: unknown message class: %s", message_class.c_str());
-        }
-    }
-}
-
-int init_media_plugin(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data, LLPluginInstance::sendMessageFunction *plugin_send_func, void **plugin_user_data)
-{
-    if (MediaPluginGStreamer010::startup())
-    {
-        MediaPluginGStreamer010 *self = new MediaPluginGStreamer010(host_send_func, host_user_data);
-        *plugin_send_func = MediaPluginGStreamer010::staticReceiveMessage;
-        *plugin_user_data = (void*)self;
-
-        return 0; // okay
-    }
-    else
-    {
-        return -1; // failed to init
-    }
-}
-
-#else // LL_GSTREAMER010_ENABLED
-
-// Stubbed-out class with constructor/destructor (necessary or windows linker
-// will just think its dead code and optimize it all out)
-class MediaPluginGStreamer010 : public MediaPluginBase
-{
-public:
-    MediaPluginGStreamer010(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data);
-    ~MediaPluginGStreamer010();
-    /* virtual */ void receiveMessage(const char *message_string);
-};
-
-MediaPluginGStreamer010::MediaPluginGStreamer010(
-    LLPluginInstance::sendMessageFunction host_send_func,
-    void *host_user_data ) :
-    MediaPluginBase(host_send_func, host_user_data)
-{
-    // no-op
-}
-
-MediaPluginGStreamer010::~MediaPluginGStreamer010()
-{
-    // no-op
-}
-
-void MediaPluginGStreamer010::receiveMessage(const char *message_string)
-{
-    // no-op
-}
-
-// We're building without GStreamer enabled.  Just refuse to initialize.
-int init_media_plugin(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data, LLPluginInstance::sendMessageFunction *plugin_send_func, void **plugin_user_data)
-{
-    return -1;
-}
-
-#endif // LL_GSTREAMER010_ENABLED
diff --git a/indra/media_plugins/gstreamer10/CMakeLists.txt b/indra/media_plugins/gstreamer10/CMakeLists.txt
new file mode 100644
index 0000000000..14ce5bfaa1
--- /dev/null
+++ b/indra/media_plugins/gstreamer10/CMakeLists.txt
@@ -0,0 +1,41 @@
+# -*- cmake -*-
+
+project(media_plugin_gstreamer10)
+
+include(00-Common)
+include(LLCommon)
+include(LLImage)
+include(LLMath)
+include(LLWindow)
+include(Linking)
+include(PluginAPI)
+include(OpenGL)
+include(GLIB)
+
+include(GStreamer10Plugin)
+
+### media_plugin_gstreamer10
+
+set(media_plugin_gstreamer10_SOURCE_FILES
+    media_plugin_gstreamer10.cpp
+    )
+
+set(media_plugin_gstreamer10_HEADER_FILES
+    llmediaimplgstreamer_syms.h
+    llmediaimplgstreamertriviallogging.h
+    )
+
+add_library(media_plugin_gstreamer10
+    SHARED
+    ${media_plugin_gstreamer10_SOURCE_FILES}
+)
+
+target_link_libraries(media_plugin_gstreamer10 media_plugin_base ll::gstreamer10 )
+
+if (WINDOWS)
+  set_target_properties(
+    media_plugin_gstreamer10
+    PROPERTIES
+    LINK_FLAGS "/MANIFEST:NO /SAFESEH:NO /NODEFAULTLIB:LIBCMT"
+    )
+endif (WINDOWS)
diff --git a/indra/media_plugins/gstreamer010/llmediaimplgstreamer.h b/indra/media_plugins/gstreamer10/llmediaimplgstreamer.h
index cae11a5cb3..cae11a5cb3 100644
--- a/indra/media_plugins/gstreamer010/llmediaimplgstreamer.h
+++ b/indra/media_plugins/gstreamer10/llmediaimplgstreamer.h
diff --git a/indra/media_plugins/gstreamer10/llmediaimplgstreamer_syms_raw.inc b/indra/media_plugins/gstreamer10/llmediaimplgstreamer_syms_raw.inc
new file mode 100644
index 0000000000..6f5bb04bdf
--- /dev/null
+++ b/indra/media_plugins/gstreamer10/llmediaimplgstreamer_syms_raw.inc
@@ -0,0 +1,71 @@
+#define G gstSymbolGrabber
+
+LL_GRAB_SYM(G, true, gst_buffer_new, GstBuffer*, void)
+LL_GRAB_SYM(G, true, gst_structure_set_value, void, GstStructure *, const gchar *, const GValue*)
+LL_GRAB_SYM(G, true, gst_init_check, gboolean, int *argc, char **argv[], GError ** err)
+LL_GRAB_SYM(G, true, gst_message_get_type, GType, void)
+LL_GRAB_SYM(G, true, gst_message_type_get_name, const gchar*, GstMessageType type)
+LL_GRAB_SYM(G, true, gst_message_parse_error, void, GstMessage *message, GError **gerror, gchar **debug)
+LL_GRAB_SYM(G, true, gst_message_parse_warning, void, GstMessage *message, GError **gerror, gchar **debug)
+LL_GRAB_SYM(G, true, gst_message_parse_state_changed, void, GstMessage *message, GstState *oldstate, GstState *newstate, GstState *pending)
+LL_GRAB_SYM(G, true, gst_element_set_state, GstStateChangeReturn, GstElement *element, GstState state)
+LL_GRAB_SYM(G, true, gst_object_unref, void, gpointer object)
+LL_GRAB_SYM(G, true, gst_object_get_type, GType, void)
+LL_GRAB_SYM(G, true, gst_pipeline_get_type, GType, void)
+LL_GRAB_SYM(G, true, gst_pipeline_get_bus, GstBus*, GstPipeline *pipeline)
+LL_GRAB_SYM(G, true, gst_bus_add_watch, guint, GstBus * bus, GstBusFunc func, gpointer user_data)
+LL_GRAB_SYM(G, true, gst_element_factory_make, GstElement*, const gchar *factoryname, const gchar *name)
+LL_GRAB_SYM(G, true, gst_element_get_type, GType, void)
+LL_GRAB_SYM(G, true, gst_static_pad_template_get, GstPadTemplate*, GstStaticPadTemplate *pad_template)
+LL_GRAB_SYM(G, true, gst_element_class_add_pad_template, void, GstElementClass *klass, GstPadTemplate *temp)
+LL_GRAB_SYM(G, true, gst_caps_from_string, GstCaps *, const gchar *string)
+LL_GRAB_SYM(G, true, gst_caps_get_structure, GstStructure *, const GstCaps *caps, guint index)
+LL_GRAB_SYM(G, true, gst_element_register, gboolean, GstPlugin *plugin, const gchar *name, guint rank, GType type)
+LL_GRAB_SYM(G, true, gst_structure_get_int, gboolean, const GstStructure *structure, const gchar *fieldname, gint *value)
+LL_GRAB_SYM(G, true, gst_structure_get_value, const GValue *, const GstStructure *structure, const gchar *fieldname)
+LL_GRAB_SYM(G, true, gst_value_get_fraction_numerator, gint, const GValue *value)
+LL_GRAB_SYM(G, true, gst_value_get_fraction_denominator, gint, const GValue *value)
+LL_GRAB_SYM(G, true, gst_structure_get_name, const gchar *, const GstStructure *structure)
+LL_GRAB_SYM(G, true, gst_element_seek, bool, GstElement *, gdouble, GstFormat, GstSeekFlags, GstSeekType, gint64, GstSeekType, gint64)
+
+LL_GRAB_SYM(G, false, gst_registry_fork_set_enabled, void, gboolean enabled)
+LL_GRAB_SYM(G, false, gst_segtrap_set_enabled, void, gboolean enabled)
+LL_GRAB_SYM(G, false, gst_message_parse_buffering, void, GstMessage *message, gint *percent)
+LL_GRAB_SYM(G, false, gst_message_parse_info, void, GstMessage *message, GError **gerror, gchar **debug)
+LL_GRAB_SYM(G, false, gst_element_query_position, gboolean, GstElement *element, GstFormat *format, gint64 *cur)
+LL_GRAB_SYM(G, false, gst_version, void, guint *major, guint *minor, guint *micro, guint *nano)
+
+LL_GRAB_SYM(G, true, gst_message_parse_tag, void, GstMessage *, GstTagList **)
+LL_GRAB_SYM(G, true, gst_tag_list_foreach, void, const GstTagList *, GstTagForeachFunc, gpointer)
+LL_GRAB_SYM(G, true, gst_tag_list_get_tag_size, guint, const GstTagList *, const gchar *)
+LL_GRAB_SYM(G, true, gst_tag_list_get_value_index, const GValue *, const GstTagList *, const gchar *, guint)
+
+LL_GRAB_SYM(G, true, gst_caps_new_simple, GstCaps*, const char *, const char*, ... )
+
+LL_GRAB_SYM(G, true, gst_sample_get_caps, GstCaps*, GstSample* )
+LL_GRAB_SYM(G, true, gst_sample_get_buffer, GstBuffer*, GstSample* )
+LL_GRAB_SYM(G, true, gst_buffer_map, gboolean, GstBuffer*, GstMapInfo*, GstMapFlags )
+LL_GRAB_SYM(G, true, gst_buffer_unmap, void, GstBuffer*, GstMapInfo* )
+
+LL_GRAB_SYM(G, true, gst_app_sink_set_caps, void, GstAppSink*, GstCaps const* )
+LL_GRAB_SYM(G, true, gst_app_sink_pull_sample, GstSample*, GstAppSink* )
+
+LL_GRAB_SYM(G, true, g_free, void, gpointer )
+LL_GRAB_SYM(G, true, g_error_free, void, GError* )
+
+LL_GRAB_SYM(G, true, g_main_context_pending, gboolean, GMainContext* )
+LL_GRAB_SYM(G, true, g_main_loop_get_context, GMainContext*, GMainLoop* )
+LL_GRAB_SYM(G, true, g_main_context_iteration, gboolean, GMainContext*, gboolean )
+LL_GRAB_SYM(G, true, g_main_loop_new, GMainLoop*, GMainContext*, gboolean )
+LL_GRAB_SYM(G, true, g_main_loop_quit, void, GMainLoop* )
+LL_GRAB_SYM(G, true, gst_mini_object_unref, void, GstMiniObject* )
+LL_GRAB_SYM(G, true, g_object_set, void, gpointer, gchar const*, ... )
+LL_GRAB_SYM(G, true, g_source_remove, gboolean, guint )
+LL_GRAB_SYM(G, true, g_value_get_string, gchar const*, GValue const* )
+
+LL_GRAB_SYM(G, true, gst_debug_set_active, void, gboolean )
+LL_GRAB_SYM(G, true, gst_debug_add_log_function, void, GstLogFunction, gpointer, GDestroyNotify )
+LL_GRAB_SYM(G, true, gst_debug_set_default_threshold, void, GstDebugLevel )
+LL_GRAB_SYM(G, true, gst_debug_message_get , gchar const*, GstDebugMessage * )
+
+#undef G
diff --git a/indra/media_plugins/gstreamer10/media_plugin_gstreamer10.cpp b/indra/media_plugins/gstreamer10/media_plugin_gstreamer10.cpp
new file mode 100644
index 0000000000..0f45c151a2
--- /dev/null
+++ b/indra/media_plugins/gstreamer10/media_plugin_gstreamer10.cpp
@@ -0,0 +1,958 @@
+/**
+ * @file media_plugin_gstreamer10.cpp
+ * @brief GStreamer-1.0 plugin for LLMedia API plugin system
+ *
+ * @cond
+ * $LicenseInfo:firstyear=2016&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2016, Linden Research, Inc. / Nicky Dasmijn
+ *
+ * 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
+ */
+
+#define FLIP_Y
+
+#include "linden_common.h"
+
+#include "llgl.h"
+
+#include "llplugininstance.h"
+#include "llpluginmessage.h"
+#include "llpluginmessageclasses.h"
+#include "media_plugin_base.h"
+
+#define G_DISABLE_CAST_CHECKS
+extern "C" {
+#include <gst/gst.h>
+#include <gst/app/gstappsink.h>
+}
+
+SymbolGrabber gstSymbolGrabber;
+
+#include "llmediaimplgstreamer_syms_raw.inc"
+
+static inline void llgst_caps_unref( GstCaps * caps )
+{
+    llgst_mini_object_unref( GST_MINI_OBJECT_CAST( caps ) );
+}
+
+static inline void llgst_sample_unref( GstSample *aSample )
+{
+    llgst_mini_object_unref( GST_MINI_OBJECT_CAST( aSample ) );
+}
+
+//////////////////////////////////////////////////////////////////////////////
+//
+class MediaPluginGStreamer10 : public MediaPluginBase
+{
+public:
+    MediaPluginGStreamer10(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data);
+    ~MediaPluginGStreamer10();
+
+    /* virtual */ void receiveMessage(const char *message_string);
+
+    static bool startup();
+    static bool closedown();
+
+    gboolean processGSTEvents(GstBus *bus, GstMessage *message);
+
+private:
+    std::string getVersion();
+    bool navigateTo( const std::string urlIn );
+    bool seek( double time_sec );
+    bool setVolume( float volume );
+
+    // misc
+    bool pause();
+    bool stop();
+    bool play(double rate);
+    bool getTimePos(double &sec_out);
+
+    double MIN_LOOP_SEC = 1.0F;
+    U32 INTERNAL_TEXTURE_SIZE = 1024;
+
+    bool mIsLooping;
+
+    enum ECommand {
+        COMMAND_NONE,
+        COMMAND_STOP,
+        COMMAND_PLAY,
+        COMMAND_FAST_FORWARD,
+        COMMAND_FAST_REWIND,
+        COMMAND_PAUSE,
+        COMMAND_SEEK,
+    };
+    ECommand mCommand;
+
+private:
+    bool unload();
+    bool load();
+
+    bool update(int milliseconds);
+    void mouseDown( int x, int y );
+    void mouseUp( int x, int y );
+    void mouseMove( int x, int y );
+
+    static bool mDoneInit;
+
+    guint mBusWatchID;
+
+    float mVolume;
+
+    int mDepth;
+
+    // padded texture size we need to write into
+    int mTextureWidth;
+    int mTextureHeight;
+
+    bool mSeekWanted;
+    double mSeekDestination;
+
+    // Very GStreamer-specific
+    GMainLoop *mPump; // event pump for this media
+    GstElement *mPlaybin;
+    GstAppSink *mAppSink;
+};
+
+//static
+bool MediaPluginGStreamer10::mDoneInit = false;
+
+MediaPluginGStreamer10::MediaPluginGStreamer10( LLPluginInstance::sendMessageFunction host_send_func,
+                                                void *host_user_data )
+    : MediaPluginBase(host_send_func, host_user_data)
+    , mBusWatchID ( 0 )
+    , mSeekWanted(false)
+    , mSeekDestination(0.0)
+    , mPump ( nullptr )
+    , mPlaybin ( nullptr )
+    , mAppSink ( nullptr )
+    , mCommand ( COMMAND_NONE )
+{
+}
+
+gboolean MediaPluginGStreamer10::processGSTEvents(GstBus *bus, GstMessage *message)
+{
+    if (!message)
+        return TRUE; // shield against GStreamer bug
+
+    switch (GST_MESSAGE_TYPE (message))
+    {
+        case GST_MESSAGE_BUFFERING:
+        {
+            // NEEDS GST 0.10.11+
+            if (llgst_message_parse_buffering)
+            {
+                gint percent = 0;
+                llgst_message_parse_buffering(message, &percent);
+            }
+            break;
+        }
+        case GST_MESSAGE_STATE_CHANGED:
+        {
+            GstState old_state;
+            GstState new_state;
+            GstState pending_state;
+            llgst_message_parse_state_changed(message,
+                                              &old_state,
+                                              &new_state,
+                                              &pending_state);
+
+            switch (new_state)
+            {
+                case GST_STATE_VOID_PENDING:
+                    break;
+                case GST_STATE_NULL:
+                    break;
+                case GST_STATE_READY:
+                    setStatus(STATUS_LOADED);
+                    break;
+                case GST_STATE_PAUSED:
+                    setStatus(STATUS_PAUSED);
+                    break;
+                case GST_STATE_PLAYING:
+                    setStatus(STATUS_PLAYING);
+                    break;
+            }
+            break;
+        }
+        case GST_MESSAGE_ERROR:
+        {
+            GError *err = nullptr;
+            gchar *debug = nullptr;
+
+            llgst_message_parse_error (message, &err, &debug);
+            if (err)
+                llg_error_free (err);
+            llg_free (debug);
+
+            mCommand = COMMAND_STOP;
+
+            setStatus(STATUS_ERROR);
+
+            break;
+        }
+        case GST_MESSAGE_INFO:
+        {
+            if (llgst_message_parse_info)
+            {
+                GError *err = nullptr;
+                gchar *debug = nullptr;
+
+                llgst_message_parse_info (message, &err, &debug);
+                if (err)
+                    llg_error_free (err);
+                llg_free (debug);
+            }
+            break;
+        }
+        case GST_MESSAGE_WARNING:
+        {
+            GError *err = nullptr;
+            gchar *debug = nullptr;
+
+            llgst_message_parse_warning (message, &err, &debug);
+            if (err)
+                llg_error_free (err);
+            llg_free (debug);
+
+            break;
+        }
+        case GST_MESSAGE_EOS:
+            /* end-of-stream */
+            if (mIsLooping)
+            {
+                double eos_pos_sec = 0.0F;
+                bool got_eos_position = getTimePos(eos_pos_sec);
+
+                if (got_eos_position && eos_pos_sec < MIN_LOOP_SEC)
+                {
+                    // if we know that the movie is really short, don't
+                    // loop it else it can easily become a time-hog
+                    // because of GStreamer spin-up overhead
+                    // inject a COMMAND_PAUSE
+                    mCommand = COMMAND_PAUSE;
+                }
+                else
+                {
+                    stop();
+                    play(1.0);
+                }
+            }
+            else // not a looping media
+            {
+                // inject a COMMAND_STOP
+                mCommand = COMMAND_STOP;
+            }
+            break;
+        default:
+            /* unhandled message */
+            break;
+    }
+
+    /* we want to be notified again the next time there is a message
+     * on the bus, so return true (false means we want to stop watching
+     * for messages on the bus and our callback should not be called again)
+     */
+    return TRUE;
+}
+
+extern "C" {
+    gboolean llmediaimplgstreamer_bus_callback (GstBus     *bus,
+                                                GstMessage *message,
+                                                gpointer    data)
+    {
+        MediaPluginGStreamer10 *impl = (MediaPluginGStreamer10*)data;
+        return impl->processGSTEvents(bus, message);
+    }
+} // extern "C"
+
+
+
+bool MediaPluginGStreamer10::navigateTo ( const std::string urlIn )
+{
+    if (!mDoneInit)
+        return false; // error
+
+    setStatus(STATUS_LOADING);
+
+    mSeekWanted = false;
+
+    if (nullptr == mPump ||  nullptr == mPlaybin)
+    {
+        setStatus(STATUS_ERROR);
+        return false; // error
+    }
+
+    llg_object_set (G_OBJECT (mPlaybin), "uri", urlIn.c_str(), nullptr);
+
+    // navigateTo implicitly plays, too.
+    play(1.0);
+
+    return true;
+}
+
+
+class GstSampleUnref
+{
+    GstSample *mT;
+public:
+    GstSampleUnref( GstSample *aT )
+        : mT( aT )
+    { llassert_always( mT ); }
+
+    ~GstSampleUnref( )
+    { llgst_sample_unref( mT ); }
+};
+
+bool MediaPluginGStreamer10::update(int milliseconds)
+{
+    if (!mDoneInit)
+        return false; // error
+
+    //  DEBUGMSG("updating media...");
+
+    // sanity check
+    if (nullptr == mPump || nullptr == mPlaybin)
+    {
+        return false;
+    }
+
+    // see if there's an outstanding seek wanted
+    if (mSeekWanted &&
+        // bleh, GST has to be happy that the movie is really truly playing
+        // or it may quietly ignore the seek (with rtsp:// at least).
+        (GST_STATE(mPlaybin) == GST_STATE_PLAYING))
+    {
+        seek(mSeekDestination);
+        mSeekWanted = false;
+    }
+
+    // *TODO: time-limit - but there isn't a lot we can do here, most
+    // time is spent in gstreamer's own opaque worker-threads.  maybe
+    // we can do something sneaky like only unlock the video object
+    // for 'milliseconds' and otherwise hold the lock.
+    while (llg_main_context_pending(llg_main_loop_get_context(mPump)))
+    {
+           llg_main_context_iteration(llg_main_loop_get_context(mPump), FALSE);
+    }
+
+    // check for availability of a new frame
+
+    if( !mAppSink )
+        return true;
+
+    if( GST_STATE(mPlaybin) != GST_STATE_PLAYING) // Do not try to pull a sample if not in playing state
+        return true;
+
+    GstSample *pSample = llgst_app_sink_pull_sample( mAppSink );
+    if(!pSample)
+        return false; // Done playing
+
+    GstSampleUnref oSampleUnref( pSample );
+    GstCaps *pCaps = llgst_sample_get_caps ( pSample );
+    if (!pCaps)
+        return false;
+
+    gint width = 0, height = 0;
+    GstStructure *pStruct = llgst_caps_get_structure ( pCaps, 0);
+
+    if(!llgst_structure_get_int ( pStruct, "width", &width) )
+        width = 0;
+    if(!llgst_structure_get_int ( pStruct, "height", &height) )
+        height = 0;
+
+    if( !mPixels || width == 0 || height == 0)
+        return true;
+
+    GstBuffer *pBuffer = llgst_sample_get_buffer ( pSample );
+    GstMapInfo map;
+    llgst_buffer_map ( pBuffer, &map, GST_MAP_READ);
+
+    // Our render buffer is always 1kx1k
+
+    U32 rowSkip = INTERNAL_TEXTURE_SIZE / mTextureHeight;
+    U32 colSkip = INTERNAL_TEXTURE_SIZE / mTextureWidth;
+
+    for (int row = 0; row < mTextureHeight; ++row)
+    {
+        U8 const *pTexelIn = map.data + (row*rowSkip * width *3);
+#ifndef FLIP_Y
+        U8 *pTexelOut = mPixels + (row * mTextureWidth * mDepth );
+#else
+        U8 *pTexelOut = mPixels + ((mTextureHeight-row-1) * mTextureWidth * mDepth );
+#endif
+        for( int col = 0; col < mTextureWidth; ++col )
+        {
+            pTexelOut[ 0 ] = pTexelIn[0];
+            pTexelOut[ 1 ] = pTexelIn[1];
+            pTexelOut[ 2 ] = pTexelIn[2];
+            pTexelOut += mDepth;
+            pTexelIn += colSkip*3;
+        }
+    }
+
+    llgst_buffer_unmap( pBuffer, &map );
+    setDirty(0,0,mTextureWidth,mTextureHeight);
+
+    return true;
+}
+
+void MediaPluginGStreamer10::mouseDown( int x, int y )
+{
+  // do nothing
+}
+
+void MediaPluginGStreamer10::mouseUp( int x, int y )
+{
+  // do nothing
+}
+
+void MediaPluginGStreamer10::mouseMove( int x, int y )
+{
+  // do nothing
+}
+
+
+bool MediaPluginGStreamer10::pause()
+{
+    // todo: error-check this?
+    if (mDoneInit && mPlaybin)
+    {
+        llgst_element_set_state(mPlaybin, GST_STATE_PAUSED);
+        return true;
+    }
+    return false;
+}
+
+bool MediaPluginGStreamer10::stop()
+{
+    // todo: error-check this?
+    if (mDoneInit && mPlaybin)
+    {
+        llgst_element_set_state(mPlaybin, GST_STATE_READY);
+        return true;
+    }
+    return false;
+}
+
+bool MediaPluginGStreamer10::play(double rate)
+{
+    // NOTE: we don't actually support non-natural rate.
+
+    // todo: error-check this?
+    if (mDoneInit && mPlaybin)
+    {
+        llgst_element_set_state(mPlaybin, GST_STATE_PLAYING);
+        return true;
+    }
+    return false;
+}
+
+bool MediaPluginGStreamer10::setVolume( float volume )
+{
+    // we try to only update volume as conservatively as
+    // possible, as many gst-plugins-base versions up to at least
+    // November 2008 have critical race-conditions in setting volume - sigh
+    if (mVolume == volume)
+        return true; // nothing to do, everything's fine
+
+    mVolume = volume;
+    if (mDoneInit && mPlaybin)
+    {
+        llg_object_set(mPlaybin, "volume", mVolume, nullptr);
+        return true;
+    }
+
+    return false;
+}
+
+bool MediaPluginGStreamer10::seek(double time_sec)
+{
+    bool success = false;
+    if (mDoneInit && mPlaybin)
+    {
+        success = llgst_element_seek(mPlaybin, 1.0F, GST_FORMAT_TIME,
+                GstSeekFlags(GST_SEEK_FLAG_FLUSH |
+                         GST_SEEK_FLAG_KEY_UNIT),
+                GST_SEEK_TYPE_SET, gint64(time_sec*GST_SECOND),
+                GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
+    }
+    return success;
+}
+
+bool MediaPluginGStreamer10::getTimePos(double &sec_out)
+{
+    bool got_position = false;
+    if (mDoneInit && mPlaybin)
+    {
+        gint64 pos(0);
+        GstFormat timefmt = GST_FORMAT_TIME;
+        got_position =
+            llgst_element_query_position &&
+            llgst_element_query_position(mPlaybin,
+                             &timefmt,
+                             &pos);
+        got_position = got_position
+            && (timefmt == GST_FORMAT_TIME);
+        // GStreamer may have other ideas, but we consider the current position
+        // undefined if not PLAYING or PAUSED
+        got_position = got_position &&
+            (GST_STATE(mPlaybin) == GST_STATE_PLAYING ||
+             GST_STATE(mPlaybin) == GST_STATE_PAUSED);
+        if (got_position && !GST_CLOCK_TIME_IS_VALID(pos))
+        {
+            if (GST_STATE(mPlaybin) == GST_STATE_PLAYING)
+            {
+                // if we're playing then we treat an invalid clock time
+                // as 0, for complicated reasons (insert reason here)
+                pos = 0;
+            }
+            else
+            {
+                got_position = false;
+            }
+
+        }
+        // If all the preconditions succeeded... we can trust the result.
+        if (got_position)
+        {
+            sec_out = double(pos) / double(GST_SECOND); // gst to sec
+        }
+    }
+    return got_position;
+}
+
+bool MediaPluginGStreamer10::load()
+{
+    if (!mDoneInit)
+        return false; // error
+
+    setStatus(STATUS_LOADING);
+
+    mIsLooping = false;
+    mVolume = 0.1234567f; // minor hack to force an initial volume update
+
+    // Create a pumpable main-loop for this media
+    mPump = llg_main_loop_new (nullptr, FALSE);
+    if (!mPump)
+    {
+        setStatus(STATUS_ERROR);
+        return false; // error
+    }
+
+    // instantiate a playbin element to do the hard work
+    mPlaybin = llgst_element_factory_make ("playbin", "");
+    if (!mPlaybin)
+    {
+        setStatus(STATUS_ERROR);
+        return false; // error
+    }
+
+    // get playbin's bus
+    GstBus *bus = llgst_pipeline_get_bus (GST_PIPELINE (mPlaybin));
+    if (!bus)
+    {
+        setStatus(STATUS_ERROR);
+        return false; // error
+    }
+    mBusWatchID = llgst_bus_add_watch (bus,
+                       llmediaimplgstreamer_bus_callback,
+                       this);
+    llgst_object_unref (bus);
+
+    mAppSink = (GstAppSink*)(llgst_element_factory_make ("appsink", ""));
+
+    GstCaps* pCaps = llgst_caps_new_simple( "video/x-raw",
+                                            "format", G_TYPE_STRING, "RGB",
+                                            "width", G_TYPE_INT, INTERNAL_TEXTURE_SIZE,
+                                            "height", G_TYPE_INT, INTERNAL_TEXTURE_SIZE,
+                                            nullptr );
+
+    llgst_app_sink_set_caps( mAppSink, pCaps );
+    llgst_caps_unref( pCaps );
+
+    if (!mAppSink)
+    {
+        setStatus(STATUS_ERROR);
+        return false;
+    }
+
+    llg_object_set(mPlaybin, "video-sink", mAppSink, nullptr);
+
+    return true;
+}
+
+bool MediaPluginGStreamer10::unload ()
+{
+    if (!mDoneInit)
+        return false; // error
+
+    // stop getting callbacks for this bus
+    llg_source_remove(mBusWatchID);
+    mBusWatchID = 0;
+
+    if (mPlaybin)
+    {
+        llgst_element_set_state (mPlaybin, GST_STATE_NULL);
+        llgst_object_unref (GST_OBJECT (mPlaybin));
+        mPlaybin = nullptr;
+    }
+
+    if (mPump)
+    {
+        llg_main_loop_quit(mPump);
+        mPump = nullptr;
+    }
+
+    mAppSink = nullptr;
+
+    setStatus(STATUS_NONE);
+
+    return true;
+}
+
+void LogFunction(GstDebugCategory *category, GstDebugLevel level, const gchar *file, const gchar *function, gint line, GObject *object, GstDebugMessage *message, gpointer user_data )
+{
+    std::cerr << file << ":" << line << "(" << function << "): " << llgst_debug_message_get( message ) << std::endl;
+}
+
+//static
+bool MediaPluginGStreamer10::startup()
+{
+    // first - check if GStreamer is explicitly disabled
+    if (nullptr != getenv("LL_DISABLE_GSTREAMER"))
+        return false;
+
+    // only do global GStreamer initialization once.
+    if (!mDoneInit)
+    {
+        ll_init_apr();
+
+        // Get symbols!
+        std::vector< std::string > vctDSONames;
+        vctDSONames.push_back( "libgstreamer-1.0.so.0"  );
+        vctDSONames.push_back( "libgstapp-1.0.so.0"  );
+        vctDSONames.push_back( "libglib-2.0.so.0" );
+        vctDSONames.push_back( "libgobject-2.0.so" );
+        if( !gstSymbolGrabber.grabSymbols( vctDSONames ) )
+            return false;
+
+        if (llgst_segtrap_set_enabled)
+        {
+            llgst_segtrap_set_enabled(FALSE);
+        }
+
+        // Gstreamer tries a fork during init, waitpid-ing on it,
+        // which conflicts with any installed SIGCHLD handler...
+        struct sigaction tmpact, oldact;
+        if (llgst_registry_fork_set_enabled ) {
+            // if we can disable SIGCHLD-using forking behaviour,
+            // do it.
+            llgst_registry_fork_set_enabled(false);
+        }
+        else {
+            // else temporarily install default SIGCHLD handler
+            // while GStreamer initialises
+            tmpact.sa_handler = SIG_DFL;
+            sigemptyset( &tmpact.sa_mask );
+            tmpact.sa_flags = SA_SIGINFO;
+            sigaction(SIGCHLD, &tmpact, &oldact);
+        }
+        // Protect against GStreamer resetting the locale, yuck.
+        static std::string saved_locale;
+        saved_locale = setlocale(LC_ALL, nullptr);
+
+        llgst_debug_set_default_threshold( GST_LEVEL_WARNING );
+        llgst_debug_add_log_function( LogFunction, nullptr, nullptr );
+        llgst_debug_set_active( false );
+
+        // finally, try to initialize GStreamer!
+        GError *err = nullptr;
+        gboolean init_gst_success = llgst_init_check(nullptr, nullptr, &err);
+
+        // restore old locale
+        setlocale(LC_ALL, saved_locale.c_str() );
+
+        // restore old SIGCHLD handler
+        if (!llgst_registry_fork_set_enabled)
+            sigaction(SIGCHLD, &oldact, nullptr);
+
+        if (!init_gst_success) // fail
+        {
+            if (err)
+                llg_error_free(err);
+            return false;
+        }
+
+        mDoneInit = true;
+    }
+
+    return true;
+}
+
+//static
+bool MediaPluginGStreamer10::closedown()
+{
+    if (!mDoneInit)
+        return false; // error
+
+    gstSymbolGrabber.ungrabSymbols();
+    mDoneInit = false;
+
+    return true;
+}
+
+MediaPluginGStreamer10::~MediaPluginGStreamer10()
+{
+    closedown();
+}
+
+std::string MediaPluginGStreamer10::getVersion()
+{
+    std::string plugin_version = "GStreamer10 media plugin, GStreamer version ";
+    if (mDoneInit &&
+        llgst_version)
+    {
+        guint major, minor, micro, nano;
+        llgst_version(&major, &minor, &micro, &nano);
+        plugin_version += llformat("%u.%u.%u.%u (runtime), %u.%u.%u.%u (headers)", (unsigned int)major, (unsigned int)minor,
+                                   (unsigned int)micro, (unsigned int)nano, (unsigned int)GST_VERSION_MAJOR, (unsigned int)GST_VERSION_MINOR,
+                                   (unsigned int)GST_VERSION_MICRO, (unsigned int)GST_VERSION_NANO);
+    }
+    else
+    {
+        plugin_version += "(unknown)";
+    }
+    return plugin_version;
+}
+
+void MediaPluginGStreamer10::receiveMessage(const char *message_string)
+{
+    LLPluginMessage message_in;
+
+    if(message_in.parse(message_string) >= 0)
+    {
+        std::string message_class = message_in.getClass();
+        std::string message_name = message_in.getName();
+
+        if(message_class == LLPLUGIN_MESSAGE_CLASS_BASE)
+        {
+            if(message_name == "init")
+            {
+                LLPluginMessage message("base", "init_response");
+                LLSD versions = LLSD::emptyMap();
+                versions[LLPLUGIN_MESSAGE_CLASS_BASE] = LLPLUGIN_MESSAGE_CLASS_BASE_VERSION;
+                versions[LLPLUGIN_MESSAGE_CLASS_MEDIA] = LLPLUGIN_MESSAGE_CLASS_MEDIA_VERSION;
+                versions[LLPLUGIN_MESSAGE_CLASS_MEDIA_TIME] = LLPLUGIN_MESSAGE_CLASS_MEDIA_TIME_VERSION;
+                message.setValueLLSD("versions", versions);
+
+                load();
+
+                message.setValue("plugin_version", getVersion());
+                sendMessage(message);
+            }
+            else if(message_name == "idle")
+            {
+                // no response is necessary here.
+                double time = message_in.getValueReal("time");
+
+                // Convert time to milliseconds for update()
+                update((int)(time * 1000.0f));
+            }
+            else if(message_name == "cleanup")
+            {
+                unload();
+                closedown();
+            }
+            else if(message_name == "shm_added")
+            {
+                SharedSegmentInfo info;
+                info.mAddress = message_in.getValuePointer("address");
+                info.mSize = (size_t)message_in.getValueS32("size");
+                std::string name = message_in.getValue("name");
+
+                mSharedSegments.insert(SharedSegmentMap::value_type(name, info));
+            }
+            else if(message_name == "shm_remove")
+            {
+                std::string name = message_in.getValue("name");
+
+                SharedSegmentMap::iterator iter = mSharedSegments.find(name);
+                if(iter != mSharedSegments.end())
+                {
+                    if(mPixels == iter->second.mAddress)
+                    {
+                        // This is the currently active pixel buffer.  Make sure we stop drawing to it.
+                        mPixels = nullptr;
+                        mTextureSegmentName.clear();
+                    }
+                    mSharedSegments.erase(iter);
+                }
+
+                // Send the response so it can be cleaned up.
+                LLPluginMessage message("base", "shm_remove_response");
+                message.setValue("name", name);
+                sendMessage(message);
+            }
+        }
+        else if(message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA)
+        {
+            if(message_name == "init")
+            {
+                // Plugin gets to decide the texture parameters to use.
+                LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params");
+                // lame to have to decide this now, it depends on the movie.  Oh well.
+                mDepth = 4;
+
+                mTextureWidth = 1;
+                mTextureHeight = 1;
+
+                message.setValueU32("format", GL_RGBA);
+                message.setValueU32("type", GL_UNSIGNED_INT_8_8_8_8_REV);
+
+                message.setValueS32("depth", mDepth);
+                message.setValueS32("default_width", INTERNAL_TEXTURE_SIZE );
+                message.setValueS32("default_height", INTERNAL_TEXTURE_SIZE );
+                message.setValueU32("internalformat", GL_RGBA8);
+                message.setValueBoolean("coords_opengl", true); // true == use OpenGL-style coordinates, false == (0,0) is upper left.
+                message.setValueBoolean("allow_downsample", true); // we respond with grace and performance if asked to downscale
+                sendMessage(message);
+            }
+            else if(message_name == "size_change")
+            {
+                std::string name = message_in.getValue("name");
+                S32 width = message_in.getValueS32("width");
+                S32 height = message_in.getValueS32("height");
+                S32 texture_width = message_in.getValueS32("texture_width");
+                S32 texture_height = message_in.getValueS32("texture_height");
+
+                LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "size_change_response");
+                message.setValue("name", name);
+                message.setValueS32("width", width);
+                message.setValueS32("height", height);
+                message.setValueS32("texture_width", texture_width);
+                message.setValueS32("texture_height", texture_height);
+                sendMessage(message);
+
+                if(!name.empty())
+                {
+                    // Find the shared memory region with this name
+                    SharedSegmentMap::iterator iter = mSharedSegments.find(name);
+                    if(iter != mSharedSegments.end())
+                    {
+                        mPixels = (unsigned char*)iter->second.mAddress;
+                        mTextureSegmentName = name;
+
+                        mTextureWidth = texture_width;
+                        mTextureHeight = texture_height;
+                        memset( mPixels, 0, mTextureWidth*mTextureHeight*mDepth );
+                    }
+
+                    LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "size_change_request");
+                    message.setValue("name", mTextureSegmentName);
+                    message.setValueS32("width", INTERNAL_TEXTURE_SIZE );
+                    message.setValueS32("height", INTERNAL_TEXTURE_SIZE );
+                    sendMessage(message);
+
+                }
+            }
+            else if(message_name == "load_uri")
+            {
+                std::string uri = message_in.getValue("uri");
+                navigateTo( uri );
+                sendStatus();
+            }
+            else if(message_name == "mouse_event")
+            {
+                std::string event = message_in.getValue("event");
+                S32 x = message_in.getValueS32("x");
+                S32 y = message_in.getValueS32("y");
+
+                if(event == "down")
+                {
+                    mouseDown(x, y);
+                }
+                else if(event == "up")
+                {
+                    mouseUp(x, y);
+                }
+                else if(event == "move")
+                {
+                    mouseMove(x, y);
+                };
+            };
+        }
+        else if(message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA_TIME)
+        {
+            if(message_name == "stop")
+            {
+                stop();
+            }
+            else if(message_name == "start")
+            {
+                double rate = 0.0;
+                if(message_in.hasValue("rate"))
+                {
+                    rate = message_in.getValueReal("rate");
+                }
+                // NOTE: we don't actually support rate.
+                play(rate);
+            }
+            else if(message_name == "pause")
+            {
+                pause();
+            }
+            else if(message_name == "seek")
+            {
+                double time = message_in.getValueReal("time");
+                // defer the actual seek in case we haven't
+                // really truly started yet in which case there
+                // is nothing to seek upon
+                mSeekWanted = true;
+                mSeekDestination = time;
+            }
+            else if(message_name == "set_loop")
+            {
+                bool loop = message_in.getValueBoolean("loop");
+                mIsLooping = loop;
+            }
+            else if(message_name == "set_volume")
+            {
+                double volume = message_in.getValueReal("volume");
+                setVolume(volume);
+            }
+        }
+    }
+}
+
+int init_media_plugin(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data, LLPluginInstance::sendMessageFunction *plugin_send_func, void **plugin_user_data)
+{
+    if( MediaPluginGStreamer10::startup() )
+    {
+        MediaPluginGStreamer10 *self = new MediaPluginGStreamer10(host_send_func, host_user_data);
+        *plugin_send_func = MediaPluginGStreamer10::staticReceiveMessage;
+        *plugin_user_data = (void*)self;
+
+        return 0; // okay
+    }
+    else
+    {
+        return -1; // failed to init
+    }
+}
diff --git a/indra/media_plugins/libvlc/CMakeLists.txt b/indra/media_plugins/libvlc/CMakeLists.txt
index 202cbed96e..863b4617e9 100644
--- a/indra/media_plugins/libvlc/CMakeLists.txt
+++ b/indra/media_plugins/libvlc/CMakeLists.txt
@@ -13,13 +13,6 @@ include(LibVLCPlugin)
 
 ### media_plugin_libvlc
 
-if(NOT ADDRESS_SIZE EQUAL 32)
-  if(WINDOWS)
-    ##add_definitions(/FIXED:NO)
-  else(WINDOWS) # not windows therefore gcc LINUX and DARWIN
-    add_definitions(-fPIC)
-  endif(WINDOWS)
-endif(NOT ADDRESS_SIZE EQUAL 32)
 
 set(media_plugin_libvlc_SOURCE_FILES
     media_plugin_libvlc.cpp