From b83cc98eb1570630e35681f05a9b5b8e07a27b1e Mon Sep 17 00:00:00 2001
From: MooingLemur <mooinglemur@users.noreply.github.com>
Date: Tue, 5 Dec 2023 22:28:36 -0700
Subject: [PATCH] VERA/ZSM: remember last sample played so that async pitch
 changes work on ZSM export

---
 src/engine/platform/vera.cpp | 6 ++++++
 src/engine/platform/vera.h   | 1 +
 2 files changed, 7 insertions(+)

diff --git a/src/engine/platform/vera.cpp b/src/engine/platform/vera.cpp
index 39560cf00..2305a2a68 100644
--- a/src/engine/platform/vera.cpp
+++ b/src/engine/platform/vera.cpp
@@ -230,7 +230,12 @@ void DivPlatformVERA::tick(bool sysTick) {
         off=65536.0;
       } else {
         off=65536.0*(s->centerRate/8363.0);
+        lastCenterRate=s->centerRate;
       }
+    } else if (lastCenterRate<1) {
+      off=65536.0;
+    } else {
+      off=65536.0*(lastCenterRate/8363.0);
     }
     chan[16].freq=parent->calcFreq(chan[16].baseFreq,chan[16].pitch,chan[16].fixedArp?chan[16].baseNoteOverride:chan[16].arpOff,chan[16].fixedArp,false,8,chan[16].pitch2,chipClock,off);
     if (chan[16].freq>128) chan[16].freq=128;
@@ -529,6 +534,7 @@ int DivPlatformVERA::init(DivEngine* p, int channels, int sugRate, const DivConf
   pcm=new struct VERA_PCM;
   dumpWrites=false;
   skipRegisterWrites=false;
+  lastCenterRate=-1;
   setFlags(flags);
   reset();
   return 17;
diff --git a/src/engine/platform/vera.h b/src/engine/platform/vera.h
index 63a3113c1..992bb0798 100644
--- a/src/engine/platform/vera.h
+++ b/src/engine/platform/vera.h
@@ -54,6 +54,7 @@ class DivPlatformVERA: public DivDispatch {
     unsigned char regPool[69];
     struct VERA_PSG* psg;
     struct VERA_PCM* pcm;
+    int lastCenterRate;
   
     int calcNoteFreq(int ch, int note);
     friend void putDispatchChip(void*,int);