Make SPU wait for boot up sound to finish

src/Library/include/BootLoader/boot_loader.hpp

@@ -6,6 +6,7 @@ namespace GPU {
 }
 
 namespace SPU {
+    void stop_voices();
     void setup();
 }
 

src/Library/src/BootLoader/spu_boot.cpp

@@ -1,15 +1,12 @@
 #include <PSX/System/IOPorts/SPU_IO.hpp>
 #include <PSX/System/IOPorts/DMA_IO.hpp>
+#include <stdio.h>
 #include <limits.h>
 
 namespace SPU {
     using namespace Port;
     using namespace DMA::Port;
 
-    static void clear_key() {
-        Key::off.write(UI32_MAX);
-    }
-
     static void clear_main_volume() {
         static constexpr auto StartVol = SweepVolume::with(SweepVolume::VolumeEnable, SweepVolume::Volume.with(I16_MAX >> 2));
 
@@ -70,8 +67,24 @@ namespace SPU {
         DataTransferControl.write(RequiredValue);
     }
 
+    static void wait_voices() {
+        static constexpr int16_t Treshhold = (I16_MAX*0.03);
+
+        try_again:
+        for(const auto& voice : Voices) {
+            if(voice.currentVolume.read() > Treshhold) {
+                goto try_again;
+            }
+        }
+    }
+
+    void stop_voices() {
+        Key::off.write(UI32_MAX);
+    }
+
     void setup() {
-        clear_key();
+        wait_voices();
+
         clear_main_volume();
         clear_cd_and_ext_audio_volume();
         clear_control_register();

src/Library/src/BootLoader/start_boot.cpp

@@ -4,7 +4,13 @@
 namespace JabyEngine {
     void start() {
         printf("Hello Planschbecken\n");
+        //We key off the voices
+        SPU::stop_voices();
         
+        //Load picture here
+        //Pause??
+
+        //Do the real setup
         GPU::setup();
         SPU::setup();
         printf("Setup done!\n");