From d470f36a0d669d6bc21d7a17483df9de6376e67d Mon Sep 17 00:00:00 2001
From: eadmaster <51NMBsFda0ab1>
Date: Tue, 22 Dec 2020 11:52:28 +0100
Subject: [PATCH] fixed missing volume on 32bit systems (#170)

---
 libgambatte/src/sound.cpp | 25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/libgambatte/src/sound.cpp b/libgambatte/src/sound.cpp
index 1b0f3a04..45248e62 100644
--- a/libgambatte/src/sound.cpp
+++ b/libgambatte/src/sound.cpp
@@ -103,10 +103,27 @@ namespace gambatte
       uint_least32_t *const buf = buffer_ + bufferPos_;
 
       std::memset(buf, 0, cycles * sizeof(uint_least32_t));
-      ch1_.update(buf, (soChVol_[0] * soVol_ * 0x1999999A) >> 32, cycles);
-      ch2_.update(buf, (soChVol_[1] * soVol_ * 0x1999999A) >> 32, cycles);
-      ch3_.update(buf, (soChVol_[2] * soVol_ * 0x1999999A) >> 32, cycles);
-      ch4_.update(buf, (soChVol_[3] * soVol_ * 0x1999999A) >> 32, cycles);
+      
+      /* apply volume scaling if set by the user */
+      if (soChVol_[0]<10)
+        ch1_.update(buf, ((uint_fast64_t)0x1999999A * soChVol_[0] * soVol_) >> 32, cycles);
+      else
+        ch1_.update(buf, soVol_, cycles);
+
+      if (soChVol_[1]<10)  
+        ch2_.update(buf, ((uint_fast64_t)0x1999999A * soChVol_[1] * soVol_) >> 32, cycles);
+      else
+        ch2_.update(buf, soVol_, cycles);
+
+      if (soChVol_[2]<10)
+        ch3_.update(buf, ((uint_fast64_t)0x1999999A * soChVol_[2] * soVol_) >> 32, cycles);
+      else
+        ch3_.update(buf, soVol_, cycles);
+      
+      if (soChVol_[3]<10)
+        ch4_.update(buf, ((uint_fast64_t)0x1999999A * soChVol_[3] * soVol_) >> 32, cycles);
+      else
+        ch4_.update(buf, soVol_, cycles);
    }
 
    void PSG::generateSamples(unsigned long const cycleCounter, bool const doubleSpeed)