deal with SPU FIFO overflow in a more pleasant manner

melonDS-emu · Sep 4, 2019 · 3efe90f · 3efe90f
1 parent 02a6fe1
commit 3efe90f
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/src/SPU.cpp b/src/SPU.cpp
@@ -731,7 +731,13 @@ void Mix(u32 samples)
         OutputBuffer[OutputWriteOffset + 1] = r >> 1;
         OutputWriteOffset += 2;
         OutputWriteOffset &= ((2*OutputBufferSize)-1);
-        if (OutputWriteOffset == OutputReadOffset) printf("!! SOUND FIFO OVERFLOW %d\n", OutputWriteOffset>>1);
+        if (OutputWriteOffset == OutputReadOffset)
+        {
+            //printf("!! SOUND FIFO OVERFLOW %d\n", OutputWriteOffset>>1);
+            // advance the read position too, to avoid losing the entire FIFO
+            OutputReadOffset += 2;
+            OutputReadOffset &= ((2*OutputBufferSize)-1);
+        }
     }
 
     NDS::ScheduleEvent(NDS::Event_SPU, true, 1024*kSamplesPerRun, Mix, kSamplesPerRun);