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diff --git a/indra/llaudio/llstreamingaudio_fmodstudio.h b/indra/llaudio/llstreamingaudio_fmodstudio.h
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+/**
+ * @file streamingaudio_fmodstudio.h
+ * @brief Definition of LLStreamingAudio_FMODSTUDIO implementation
+ *
+ * $LicenseInfo:firstyear=2020&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2020, 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
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_STREAMINGAUDIO_FMODSTUDIO_H
+#define LL_STREAMINGAUDIO_FMODSTUDIO_H
+
+#include "stdtypes.h" // from llcommon
+
+#include "llstreamingaudio.h"
+#include "lltimer.h"
+
+//Stubs
+class LLAudioStreamManagerFMODSTUDIO;
+namespace FMOD
+{
+    class System;
+    class Channel;
+}
+
+//Interfaces
+class LLStreamingAudio_FMODSTUDIO : public LLStreamingAudioInterface
+{
+public:
+    LLStreamingAudio_FMODSTUDIO(FMOD::System *system);
+    /*virtual*/ ~LLStreamingAudio_FMODSTUDIO();
+
+    /*virtual*/ void start(const std::string& url);
+    /*virtual*/ void stop();
+    /*virtual*/ void pause(S32 pause);
+    /*virtual*/ void update();
+    /*virtual*/ S32 isPlaying();
+    /*virtual*/ void setGain(F32 vol);
+    /*virtual*/ F32 getGain();
+    /*virtual*/ std::string getURL();
+
+    /*virtual*/ bool supportsAdjustableBufferSizes(){return true;}
+    /*virtual*/ void setBufferSizes(U32 streambuffertime, U32 decodebuffertime);
+private:
+    void killDeadStreams();
+
+    FMOD::System *mSystem;
+
+    LLAudioStreamManagerFMODSTUDIO *mCurrentInternetStreamp;
+    FMOD::Channel *mFMODInternetStreamChannelp;
+    std::list<LLAudioStreamManagerFMODSTUDIO *> mDeadStreams;
+
+    std::string mURL;
+    F32 mGain;
+    S32 mRetryCount;
+};
+
+
+#endif // LL_STREAMINGAUDIO_FMODSTUDIO_H