ym2612: immediately update key state on keyOn/keyOff

Fixes Puyo Puyo Tsuu theme

ares/component/audio/ym2612/channel.cpp

@@ -1,6 +1,6 @@
-auto YM2612::Channel::Operator::updateKeyState(bool state) -> void {
-  if(keyOn == state) return;  //no change
-  keyOn = state;
+auto YM2612::Channel::Operator::updateKeyState() -> void {
+  if(keyOn == keyLine) return;  //no change
+  keyOn = keyLine;
 
   if(keyOn) {
     //restart phase and envelope generators
@@ -27,7 +27,7 @@ auto YM2612::Channel::Operator::updateKeyState(bool state) -> void {
 }
 
 auto YM2612::Channel::Operator::runEnvelope() -> void {
-  updateKeyState(keyLine);
+  updateKeyState();
   if(ym2612.envelope.clock & (1 << envelope.divider) - 1) return;
 
   u32 value = ym2612.envelope.clock >> envelope.divider;

ares/component/audio/ym2612/io.cpp

@@ -73,6 +73,7 @@ auto YM2612::writeData(n8 data) -> void {
     channels[index][2].keyLine = data.bit(6);
     channels[index][3].keyLine = data.bit(7);
 
+    for(u32 n : range(4)) channels[index][n].updateKeyState();
     break;
   }
 

ares/component/audio/ym2612/ym2612.hpp

@@ -91,7 +91,7 @@ struct YM2612 {
       Operator(Channel& channel) : channel(channel), ym2612(channel.ym2612) {}
 
       //channel.cpp
-      auto updateKeyState(bool) -> void;
+      auto updateKeyState() -> void;
 
       auto runEnvelope() -> void;
       auto runPhase() -> void;