1 files changed, 151 insertions, 0 deletions
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..5149dd62e0
--- /dev/null
+++ b/indra/media_plugins/cef/linux/volume_catcher_linux.h
@@ -0,0 +1,151 @@
+/** 
+ * @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 VolumeCatcherPulseAudio : public virtual 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 virtual VolumeCatcherImpl
+{
+public:
+	VolumeCatcherPipeWire();
+	~VolumeCatcherPipeWire();
+
+	bool loadsyms(std::string pw_dso_name);
+	void init();
+	void cleanup();
+
+	// some of these should be private
+
+	void pwLock();
+	void pwUnlock();
+
+	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;
+	pw_context* mContext;
+	pw_core* mCore;
+	pw_registry* mRegistry;
+	spa_hook mRegistryListener;
+
+	std::unordered_set<ChildNode*> mChildNodes;
+	std::mutex mChildNodesMutex;
+};
+
+// static void debugClear()
+// {
+// 	auto file = fopen("volume-catcher-log.txt", "w");
+// 	fprintf(file, "\n");
+// 	fclose(file);
+// }
+
+// static void debugPrint(const char* format, ...)
+// {
+//     va_list args;
+//     va_start(args, format);
+// 	auto file = fopen("volume-catcher-log.txt", "a");
+//     vfprintf(file, format, args);
+// 	fclose(file);
+//     va_end(args);
+// }
+
+#endif // VOLUME_CATCHER_LINUX_H