From 69e351575732afe074e659f498f3ec16e11a861a Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Fri, 30 Jun 2023 06:09:42 -0500
Subject: [PATCH] SegaPCM: real limit is 2MB

---
 src/engine/platform/segapcm.cpp | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/engine/platform/segapcm.cpp b/src/engine/platform/segapcm.cpp
index 47411496..9376bb0c 100644
--- a/src/engine/platform/segapcm.cpp
+++ b/src/engine/platform/segapcm.cpp
@@ -423,7 +423,7 @@ const void* DivPlatformSegaPCM::getSampleMem(int index) {
 }
 
 size_t DivPlatformSegaPCM::getSampleMemCapacity(int index) {
-  return index == 0 ? 16777216 : 0;
+  return index == 0 ? 2097152 : 0;
 }
 
 size_t DivPlatformSegaPCM::getSampleMemUsage(int index) {
@@ -465,7 +465,7 @@ void DivPlatformSegaPCM::reset() {
 void DivPlatformSegaPCM::renderSamples(int sysID) {
   size_t memPos=0;
 
-  memset(sampleMem,0,16777216);
+  memset(sampleMem,0,2097152);
   memset(sampleLoaded,0,256*sizeof(bool));
   memset(sampleOffSegaPCM,0,256*sizeof(unsigned int));
   memset(sampleEndSegaPCM,0,256);
@@ -482,7 +482,7 @@ void DivPlatformSegaPCM::renderSamples(int sysID) {
     }
     logV("- sample %d will be at %x with length %x",i,memPos,alignedSize);
     sampleLoaded[i]=true;
-    if (memPos>=16777216) break;
+    if (memPos>=2097152) break;
     sampleOffSegaPCM[i]=memPos;
     for (unsigned int j=0; j<alignedSize; j++) {
       if (j>=sample->samples) {
@@ -491,10 +491,10 @@ void DivPlatformSegaPCM::renderSamples(int sysID) {
         sampleMem[memPos++]=((unsigned char)sample->data8[j]+0x80);
       }
       sampleEndSegaPCM[i]=((memPos+0xff)>>8)-1;
-      if (memPos>=16777216) break;
+      if (memPos>=2097152) break;
     }
     logV("  and it ends in %d",sampleEndSegaPCM[i]);
-    if (memPos>=16777216) break;
+    if (memPos>=2097152) break;
   }
   sampleMemLen=memPos;
 }
@@ -522,10 +522,10 @@ int DivPlatformSegaPCM::init(DivEngine* p, int channels, int sugRate, const DivC
     isMuted[i]=false;
     oscBuf[i]=new DivDispatchOscBuffer;
   }
-  sampleMem=new unsigned char[16777216];
+  sampleMem=new unsigned char[2097152];
   pcm.set_bank(segapcm_device::BANK_12M|segapcm_device::BANK_MASKF8);
   pcm.set_read([this](unsigned int addr) -> unsigned char {
-    return sampleMem[addr&0xffffff];
+    return sampleMem[addr&0x1fffff];
   });
   setFlags(flags);
   reset();