Avoid a full struct compare to check for changes

2 files changed, 19 insertions, 10 deletions

diff --git a/al/source.cpp b/al/source.cpp
index 2f75678c..ba622c66 100644
--- a/al/source.cpp
+++ b/al/source.cpp
@@ -4475,12 +4475,13 @@ void ALsource::eax5_set(const EaxCall& call, Eax5Props& props)
 
 void ALsource::eax_set(const EaxCall& call)
 {
-    switch (call.get_version()) {
+    switch(call.get_version())
+    {
         case 1: eax1_set(call, eax1_.d); break;
-        case 2: eax2_set(call, eax2_.d); break;
-        case 3: eax3_set(call, eax3_.d); break;
-        case 4: eax4_set(call, eax4_.d); break;
-        case 5: eax5_set(call, eax5_.d); break;
+        case 2: eax2_set(call, eax2_.d); eax2_.changed = true; break;
+        case 3: eax3_set(call, eax3_.d); eax3_.changed = true; break;
+        case 4: eax4_set(call, eax4_.d); eax4_.changed = true; break;
+        case 5: eax5_set(call, eax5_.d); eax5_.changed = true; break;
         default: eax_fail_unknown_property_id();
     }
 }
@@ -4904,36 +4905,40 @@ void ALsource::eax_commit(EaxCommitType commit_type)
 
     switch (eax_version_) {
         case 1:
-            if (!is_forced && eax1_.i == eax1_.d)
+            if(!is_forced && eax1_.i == eax1_.d)
                 return;
             eax1_.i = eax1_.d;
             eax1_translate(eax1_.i, eax_);
             break;
 
         case 2:
-            if (!is_forced && eax2_.i == eax2_.d)
+            if(!is_forced && eax2_.changed)
                 return;
+            eax2_.changed = false;
             eax2_.i = eax2_.d;
             eax2_translate(eax2_.i, eax_);
             break;
 
         case 3:
-            if (!is_forced && eax3_.i == eax3_.d)
+            if(!is_forced && eax3_.changed)
                 return;
+            eax3_.changed = false;
             eax3_.i = eax3_.d;
             eax3_translate(eax3_.i, eax_);
             break;
 
         case 4:
-            if (!is_forced && eax4_.i == eax4_.d)
+            if(!is_forced && eax4_.changed)
                 return;
+            eax4_.changed = false;
             eax4_.i = eax4_.d;
             eax4_translate(eax4_.i, eax_);
             break;
 
         case 5:
-            if (!is_forced && eax5_.i == eax5_.d)
+            if(!is_forced && eax5_.changed)
                 return;
+            eax5_.changed = false;
             eax5_.i = eax5_.d;
             eax_ = eax5_.d;
             break;
diff --git a/al/source.h b/al/source.h
index 5e88a7b3..850ce64f 100644
--- a/al/source.h
+++ b/al/source.h
@@ -207,6 +207,7 @@ private:
     using Eax2Props = EAX20BUFFERPROPERTIES;
 
     struct Eax2State {
+        bool changed{false};
         Eax2Props i; // Immediate.
         Eax2Props d; // Deferred.
     };
@@ -214,6 +215,7 @@ private:
     using Eax3Props = EAX30SOURCEPROPERTIES;
 
     struct Eax3State {
+        bool changed{false};
         Eax3Props i; // Immediate.
         Eax3Props d; // Deferred.
     };
@@ -230,6 +232,7 @@ private:
     };
 
     struct Eax4State {
+        bool changed{false};
         Eax4Props i; // Immediate.
         Eax4Props d; // Deferred.
     };
@@ -247,6 +250,7 @@ private:
     };
 
     struct Eax5State {
+        bool changed{false};
         Eax5Props i; // Immediate.
         Eax5Props d; // Deferred.
     };