Update Linux media handling (#1146)

* Enable CEF browser for Linux

* Disable the update for Linux, we don't have that one right now

* Update build_linux.yaml

We need  libpulse-dev for volume_catcher Linux

* Add linux_volum_catcher* files

* Enable OpenAL for Linux-ReleaseOS

* Linux: Update OpenAL

* Update SDL2

* Add libsndio-dev to the dependencies.

* Update CEF to an official LL version

* Remove dupe of emoji_shortcodes

* Reording autobuild does because it can and wants to

* Linux: Disable NDOF for the time being. After updating the ndof 3P needs to be rebuilt and we do not have a fresh one from LL yet.
Forcefully undefine LIB_NDOF, it gets defined in the build variables no matter if it is safe to define.

* Remove wrestling with mutliarch and LIBGL_DRIVERS_PATH

* Remove tcmalloc snippet, tcmalloc is a very faint bad dream of the past

* Putting out a warning this viewer ran on a x64 arch and then suggesting to install 32 bit compat packages makes no sense at all

* CEF resources need to be in lib

* It;'s okay to warn about missing plugins

* Linux: CEF keyboard handling

* Remove old gstreamer 0.10 implementation

* Linux DSO loading always had been very peculiar due to macro magic.
At least now it is peculiar shared magic with only one implementation.

* Remove -fPIC. We get that one from LL_BUILD

* /proc/cpuinfo is not reliable to detrmine the max CPU clock. Try to determine this by reading "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq".

Only if this fails go back to /proc/cpuinfo

* Cleanup

* Cleanup common linker and compiler flags, make it more obvious which flags are for which OS/compiler

* Switch to correct plugin file

* Install libpulse-dev for volume catcher.

* And the runner needs libsndio-dev as well.

* check for runner.os=='linux'. matrix.os is the full name of the image (limux-large).

1 files changed, 424 insertions, 0 deletions

diff --git a/indra/media_plugins/cef/linux_volume_catcher.cpp b/indra/media_plugins/cef/linux_volume_catcher.cpp
new file mode 100755
index 0000000000..9e6fe461a6
--- /dev/null
+++ b/indra/media_plugins/cef/linux_volume_catcher.cpp
@@ -0,0 +1,424 @@
+/** 
+ * @file linux_volume_catcher.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.h"
+#include <set>
+#include <map>
+#include <iostream>
+extern "C" {
+#include <glib.h>
+#include <glib-object.h>
+
+#include <pulse/introspect.h>
+#include <pulse/context.h>
+#include <pulse/subscribe.h>
+#include <pulse/glib-mainloop.h> // There's no special reason why we want the *glib* PA mainloop, but the generic polling implementation seems broken.
+
+#include "apr_pools.h"
+#include "apr_dso.h"
+}
+
+#include "media_plugin_base.h"
+
+SymbolGrabber gSymbolGrabber;
+
+#include "linux_volume_catcher_pa_syms.inc"
+#include "linux_volume_catcher_paglib_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);
+}
+
+class VolumeCatcherImpl
+{
+public:
+	VolumeCatcherImpl();
+	~VolumeCatcherImpl();
+
+	void setVolume(F32 volume);
+	void pump(void);
+
+	// for internal use - can't be private because used from our C callbacks
+
+	bool loadsyms(std::string pulse_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;
+};
+
+VolumeCatcherImpl::VolumeCatcherImpl()
+	: mDesiredVolume(0.0f),
+	  mMainloop(nullptr),
+	  mPAContext(nullptr),
+	  mConnected(false),
+	  mGotSyms(false)
+{
+	init();
+}
+
+VolumeCatcherImpl::~VolumeCatcherImpl()
+{
+	cleanup();
+}
+
+bool VolumeCatcherImpl::loadsyms(std::string pulse_dso_name)
+{
+	//return grab_pa_syms({pulse_dso_name});
+    return gSymbolGrabber.grabSymbols( { pulse_dso_name }) ;
+}
+
+void VolumeCatcherImpl::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) 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 VolumeCatcherImpl::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 VolumeCatcherImpl::setVolume(F32 volume)
+{
+	mDesiredVolume = volume;
+	
+	if (!mGotSyms) return;
+
+	if (mConnected && mPAContext)
+	{
+		update_all_volumes(mDesiredVolume);
+	}
+
+	pump();
+}
+
+void VolumeCatcherImpl::pump()
+{
+	gboolean may_block = FALSE;
+	g_main_context_iteration(g_main_context_default(), may_block);
+}
+
+void VolumeCatcherImpl::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 VolumeCatcherImpl::update_all_volumes(F32 volume)
+{
+	for (std::set<U32>::iterator it = mSinkInputIndices.begin();
+	     it != mSinkInputIndices.end(); ++it)
+	{
+		update_index_volume(*it, volume);
+	}
+}
+
+void VolumeCatcherImpl::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);
+}
+
+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;
+}
+
+void callback_discovered_sinkinput(pa_context *context, const pa_sink_input_info *sii, int eol, void *userdata)
+{
+	VolumeCatcherImpl *impl = dynamic_cast<VolumeCatcherImpl*>((VolumeCatcherImpl*)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)
+{
+	VolumeCatcherImpl *impl = dynamic_cast<VolumeCatcherImpl*>((VolumeCatcherImpl*)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)
+{
+	VolumeCatcherImpl *impl = dynamic_cast<VolumeCatcherImpl*>((VolumeCatcherImpl*)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:;
+	}
+}
+
+/////////////////////////////////////////////////////
+
+VolumeCatcher::VolumeCatcher()
+{
+	pimpl = new VolumeCatcherImpl();
+}
+
+VolumeCatcher::~VolumeCatcher()
+{
+	delete pimpl;
+	pimpl = nullptr;
+}
+
+void VolumeCatcher::setVolume(F32 volume)
+{
+	llassert(pimpl);
+	pimpl->setVolume(volume);
+}
+
+void VolumeCatcher::setPan(F32 pan)
+{
+	// TODO: implement this (if possible)
+}
+
+void VolumeCatcher::pump()
+{
+	llassert(pimpl);
+	pimpl->pump();
+}