Added stubs for audio services. (#116)

* stubs for audout:u, audin:u, audrec:u, audren:u, codecctl and decoding tables with nullptr for future implementations

* fixing the changes requested (remove private, explicit)

src/core/hle/service/audio/codecctl.cpp

@@ -0,0 +1,33 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/service/audio/codecctl.h"
+
+namespace Service {
+namespace Audio {
+
+CodecCtl::CodecCtl() : ServiceFramework("codecctl") {
+    static const FunctionInfo functions[] = {
+        {0x00000000, nullptr, "InitializeCodecController"},
+        {0x00000001, nullptr, "FinalizeCodecController"},
+        {0x00000002, nullptr, "SleepCodecController"},
+        {0x00000003, nullptr, "WakeCodecController"},
+        {0x00000004, nullptr, "SetCodecVolume"},
+        {0x00000005, nullptr, "GetCodecVolumeMax"},
+        {0x00000006, nullptr, "GetCodecVolumeMin"},
+        {0x00000007, nullptr, "SetCodecActiveTarget"},
+        {0x00000008, nullptr, "Unknown"},
+        {0x00000009, nullptr, "BindCodecHeadphoneMicJackInterrupt"},
+        {0x0000000A, nullptr, "IsCodecHeadphoneMicJackInserted"},
+        {0x0000000B, nullptr, "ClearCodecHeadphoneMicJackInterrupt"},
+        {0x0000000C, nullptr, "IsCodecDeviceRequested"},
+    };
+    RegisterHandlers(functions);
+}
+
+} // namespace Audio
+} // namespace Service