SL-16182: Offload audio decoding from the main thread to the general work queue.

The work queue callback binds "this". This is deemed safe due to current dependencies, but see the associated comment in the return callback. There was some trial and error to get a this-binded lambda to compile.

Due to LLVorbisDecodeState writing to disk off-thread, limit audio decodes proportional to general worker thread count. Guess the thread count for now.

1 files changed, 7 insertions, 8 deletions

diff --git a/indra/llaudio/llaudiodecodemgr.h b/indra/llaudio/llaudiodecodemgr.h
index ceaff3f2d8..4c17b46156 100644
--- a/indra/llaudio/llaudiodecodemgr.h
+++ b/indra/llaudio/llaudiodecodemgr.h
@@ -32,24 +32,23 @@
 
 #include "llassettype.h"
 #include "llframetimer.h"
+#include "llsingleton.h"
 
+template<class T> class LLPointer;
 class LLVorbisDecodeState;
 
-class LLAudioDecodeMgr
+class LLAudioDecodeMgr : public LLSingleton<LLAudioDecodeMgr>
 {
+    LLSINGLETON(LLAudioDecodeMgr);
+    ~LLAudioDecodeMgr();
 public:
-	LLAudioDecodeMgr();
-	~LLAudioDecodeMgr();
-
-	void processQueue(const F32 num_secs = 0.005);
+	void processQueue();
 	BOOL addDecodeRequest(const LLUUID &uuid);
 	void addAudioRequest(const LLUUID &uuid);
 	
 protected:
 	class Impl;
-	Impl* mImpl;
+    Impl* mImpl;
 };
 
-extern LLAudioDecodeMgr *gAudioDecodeMgrp;
-
 #endif