From 320d965f78c931e7ef78d9ffb04c55d29353a2f0 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Sat, 12 Aug 2023 03:42:10 -0500
Subject: [PATCH] =?UTF-8?q?fix=20=C2=B5-law=20encoding?=
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---
 src/engine/platform/c140.cpp | 2 +-
 src/engine/sample.cpp        | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/engine/platform/c140.cpp b/src/engine/platform/c140.cpp
index aadc7c16..b679aaee 100644
--- a/src/engine/platform/c140.cpp
+++ b/src/engine/platform/c140.cpp
@@ -448,7 +448,7 @@ void DivPlatformC140::renderSamples(int sysID) {
     } else {
       if (s->depth==DIV_SAMPLE_DEPTH_MULAW) {
         for (unsigned int i=0; i<length; i++) {
-          sampleMem[i+(memPos/sizeof(short))]=(s->dataMuLaw[i]<<8);
+          sampleMem[i+(memPos/sizeof(short))]=((s->dataMuLaw[i])<<8);
         }
       } else {
         memcpy(sampleMem+(memPos/sizeof(short)),s->data16,length);
diff --git a/src/engine/sample.cpp b/src/engine/sample.cpp
index 8ddcf229..c2ff85a6 100644
--- a/src/engine/sample.cpp
+++ b/src/engine/sample.cpp
@@ -1266,10 +1266,11 @@ void DivSample::render(unsigned int formatMask) {
     if (!initInternal(DIV_SAMPLE_DEPTH_MULAW,samples)) return;
     for (unsigned int i=0; i<samples; i++) {
       IntFloat s;
-      s.f=(float)-data16[i];
-      s.f/=32768.0f;
+      s.f=fabs(data16[i]);
+      s.f/=128.0f;
+      s.f+=1.0f;
       s.i-=0x3f800000;
-      dataMuLaw[i]=(((s.i&0x80000000)>>24)|((s.i&0x03f80000)>>19))^0xff;
+      dataMuLaw[i]=(((data16[i]<0)?0x80:0)|(s.i&0x03f80000)>>19)^0xff;
     }
   }
 }