From 5b90cb7a03dc09aab54dbb5af2e243f677b98c22 Mon Sep 17 00:00:00 2001
From: wheremyfoodat <44909372+wheremyfoodat@users.noreply.github.com>
Date: Mon, 24 Jul 2023 23:56:53 +0300
Subject: [PATCH] [MIC] Stub SetIIRFilter (Fixes Hatsune Miku)

---
 include/services/mic.hpp  |  1 +
 src/core/services/mic.cpp | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/services/mic.hpp b/include/services/mic.hpp
index b8b4d5c9..568d498c 100644
--- a/include/services/mic.hpp
+++ b/include/services/mic.hpp
@@ -15,6 +15,7 @@ class MICService {
 	void mapSharedMem(u32 messagePointer);
 	void setClamp(u32 messagePointer);
 	void setGain(u32 messagePointer);
+	void setIirFilter(u32 messagePointer);
 	void setPower(u32 messagePointer);
 	void startSampling(u32 messagePointer);
 	void theCaptainToadFunction(u32 messagePointer);
diff --git a/src/core/services/mic.cpp b/src/core/services/mic.cpp
index 7f283ce8..0648ad53 100644
--- a/src/core/services/mic.cpp
+++ b/src/core/services/mic.cpp
@@ -8,8 +8,9 @@ namespace MICCommands {
 		SetGain = 0x00080040,
 		GetGain = 0x00090000,
 		SetPower = 0x000A0040,
+		SetIirFilter = 0x000C0042,
 		SetClamp = 0x000D0040,
-		CaptainToadFunction = 0x00100040
+		CaptainToadFunction = 0x00100040,
 	};
 }
 
@@ -26,6 +27,7 @@ void MICService::handleSyncRequest(u32 messagePointer) {
 		case MICCommands::MapSharedMem: mapSharedMem(messagePointer); break;
 		case MICCommands::SetClamp: setClamp(messagePointer); break;
 		case MICCommands::SetGain: setGain(messagePointer); break;
+		case MICCommands::SetIirFilter: setIirFilter(messagePointer); break;
 		case MICCommands::SetPower: setPower(messagePointer); break;
 		case MICCommands::StartSampling: startSampling(messagePointer); break;
 		case MICCommands::CaptainToadFunction: theCaptainToadFunction(messagePointer); break;
@@ -90,6 +92,15 @@ void MICService::startSampling(u32 messagePointer) {
 	mem.write32(messagePointer + 4, Result::Success);
 }
 
+void MICService::setIirFilter(u32 messagePointer) {
+	const u32 size = mem.read32(messagePointer + 4);
+	const u32 pointer = mem.read32(messagePointer + 12);
+	log("MIC::SetIirFilter (size = %X, pointer = %08X) (Stubbed)\n", size, pointer);
+
+	mem.write32(messagePointer, IPC::responseHeader(0x0C, 1, 2));
+	mem.write32(messagePointer + 4, Result::Success);
+}
+
 // Found in Captain Toad: Treasure Tracker
 // This is what 3DBrew says:
 // When the input value is 0, value 1 is written to an u8 MIC module state field.