added persistence buffer to audio rpc packer

Author: igorkorsukov

src/framework/audio/common/rpc/rpcpacker.h

@@ -590,19 +590,30 @@ class RpcPacker
     template<class ... Types>
     static ByteArray pack(const Options& opt, const Types&... args)
     {
-        return msgpack::pack(opt, args ...);
+        ByteArray ba;
+
+        // clear but keep capacity
+        buffer.clear();
+        // makes sense if the reserve is greater than the current capacity
+        buffer.reserve(std::max(opt.rezerveSize, DEFAULT_CAPACITY));
+        msgpack::pack(buffer, args ...);
+
+        return ByteArray(&buffer[0], buffer.size());
     }
 
     template<class ... Types>
     static ByteArray pack(const Types&... args)
     {
-        return msgpack::pack(args ...);
+        return RpcPacker::pack(Options {}, args ...);
     }
 
     template<class ... Types>
     static bool unpack(const ByteArray& data, Types&... args)
     {
         return msgpack::unpack(data, args ...);
     }
+
+    static constexpr size_t DEFAULT_CAPACITY = 1024 * 200;
+    static inline std::vector<uint8_t> buffer = {};
 };
 }