[saco] Implement CAudio::StopRadio()

* Implement `CAudio::sub_100A21D0()`

saco/game/audio.cpp

@@ -3,6 +3,20 @@
 
 //-----------------------------------------------------------
 
+void CAudio::sub_100A21D0()
+{
+	if(field_0 && field_0 == 1)
+	{
+		if(ScriptCommand(&is_wav_loaded, 1))
+		{
+			ScriptCommand(&play_wav, 1);
+			field_0 = 2;
+		}
+	}
+}
+
+//-----------------------------------------------------------
+
 int CAudio::GetRadioStation() 
 {
 	int iRadioStation = 0;
@@ -30,6 +44,17 @@ void CAudio::StartRadio(int iStation)
 
 //-----------------------------------------------------------
 
+void CAudio::StopRadio()
+{
+	_asm push 0
+	_asm push 0
+	_asm mov ecx, 0xB6BC90
+	_asm mov edx, 0x506F70
+	_asm call edx
+}
+
+//-----------------------------------------------------------
+
 float CAudio::GetRadioVolume()
 {
     return *(float*)0xB5FCC8;

saco/game/audio.h

@@ -1,22 +1,29 @@
 
 #pragma once
 
-class CAudio // size: 5
-{
-public:
-	int field_0;
-	char field_4;
+//-----------------------------------------------------------
 
+class CAudio
+{
+private:
+	int field_0;
+	bool field_4;
+
+public:
 	CAudio() {
 		field_0 = 0;
-		field_4 = 0;
-	};
+		field_4 = false;
+	}
 
+	void sub_100A21D0();
 	int GetRadioStation();
 	void StartRadio(int iStation);
+	void StopRadio();
 	float GetRadioVolume();
 	void StopOutdoorAmbienceTrack();
 	void SetOutdoorAmbienceTrack(int iTrack);
 	void PlaySound(int iSound, float fX, float fY, float fZ);
 	bool IsOutdoorAmbienceTrackDisabled();
 };
+
+//-----------------------------------------------------------