From d3a585beee9c4664745e18a4d7e09d1c6e13424e Mon Sep 17 00:00:00 2001
From: Nico de Poel <ndepoel@gmail.com>
Date: Fri, 23 Jul 2021 09:10:59 +0200
Subject: [PATCH] Added a volume slider to the inspector for the audio manager,
 so we can silence the game during testing if audio is not needed

---
 Assets/Scripts/AudioManager.cs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/Assets/Scripts/AudioManager.cs b/Assets/Scripts/AudioManager.cs
index 1e7f5ce..c00020e 100644
--- a/Assets/Scripts/AudioManager.cs
+++ b/Assets/Scripts/AudioManager.cs
@@ -30,6 +30,13 @@ public class AudioManager : MonoBehaviour
             return instance;
         }
     }
+
+    [SerializeField, Range(0, 1)]
+    private float masterVolume = 1f;
+
+    private float prevMasterVolume;
+
+    private FMOD.ChannelGroup masterChannelGroup;
     
     void Awake()
     {
@@ -43,6 +50,20 @@ public class AudioManager : MonoBehaviour
         InitFmod();
     }
 
+    void Update()
+    {
+        if (!fmodSystem.hasHandle() || !masterChannelGroup.hasHandle())
+            return;
+
+        if (!Mathf.Approximately(masterVolume, prevMasterVolume))
+        {
+            masterChannelGroup.setVolume(masterVolume);
+            prevMasterVolume = masterVolume;
+        }
+        
+        masterChannelGroup.getVolume(out masterVolume);
+    }
+
     void OnDisable()
     {
         // Ensure FMOD gets closed before hot reload
@@ -85,6 +106,11 @@ public class AudioManager : MonoBehaviour
 
         result = fmodSystem.init(MaxVirtualChannels, FMOD.INITFLAGS.VOL0_BECOMES_VIRTUAL, IntPtr.Zero);
         CheckFmodResult(result, "FMOD.System.init");
+
+        result = fmodSystem.getMasterChannelGroup(out masterChannelGroup);
+        CheckFmodResult(result, "FMOD.System.getMasterChannelGroup");
+        masterChannelGroup.setVolume(masterVolume);
+        prevMasterVolume = masterVolume;
     }
 
     private void CheckFmodResult(FMOD.RESULT result, string cause)