[MIC] Implement GetGain & SetGain

include/services/mic.hpp

@@ -10,7 +10,11 @@ class MICService {
 	MAKE_LOG_FUNCTION(log, micLogger)
 
 	// Service commands
+	void getGain(u32 messagePointer);
 	void mapSharedMem(u32 messagePointer);
+	void setGain(u32 messagePointer);
+
+	u8 gain = 0; // How loud our microphone input signal is
 
 public:
 	MICService(Memory& mem) : mem(mem) {}

src/core/services/mic.cpp

@@ -2,7 +2,9 @@
 
 namespace MICCommands {
 	enum : u32 {
-		MapSharedMem = 0x00010042
+		MapSharedMem = 0x00010042,
+		SetGain = 0x00080040,
+		GetGain = 0x00090000
 	};
 }
 
@@ -12,12 +14,16 @@ namespace Result {
 	};
 }
 
-void MICService::reset() {}
+void MICService::reset() {
+	gain = 0;
+}
 
 void MICService::handleSyncRequest(u32 messagePointer) {
 	const u32 command = mem.read32(messagePointer);
 	switch (command) {
+		case MICCommands::GetGain: getGain(messagePointer); break;
 		case MICCommands::MapSharedMem: mapSharedMem(messagePointer); break;
+		case MICCommands::SetGain: setGain(messagePointer); break;
 		default: Helpers::panic("MIC service requested. Command: %08X\n", command);
 	}
 }
@@ -27,5 +33,18 @@ void MICService::mapSharedMem(u32 messagePointer) {
 	u32 handle = mem.read32(messagePointer + 12);
 
 	log("MIC::MapSharedMem (size = %08X, handle = %X) (stubbed)\n", size, handle);
+	mem.write32(messagePointer + 4, Result::Success);
+}
+
+void MICService::getGain(u32 messagePointer) {
+	log("MIC::GetGain\n");
+	mem.write32(messagePointer + 4, Result::Success);
+	mem.write8(messagePointer + 8, gain);
+}
+
+void MICService::setGain(u32 messagePointer) {
+	gain = mem.read8(messagePointer + 4);
+	log("MIC::SetGain (value = %d)\n", gain);
+
 	mem.write32(messagePointer + 4, Result::Success);
 }