Minor refactor.

research/miniaudio_engine.h

@@ -8324,21 +8324,22 @@ static void ma_sound_mix_wait(ma_sound* pSound)
     }
 }
 
-
-static void ma_engine_mix_sound(ma_engine* pEngine, ma_sound_group* pGroup, ma_sound* pSound, ma_uint64 frameCount)
+static void ma_engine_mix_sound_internal(ma_engine* pEngine, ma_sound_group* pGroup, ma_sound* pSound, ma_uint64 frameCount)
 {
-    MA_ASSERT(pEngine != NULL);
-    MA_ASSERT(pGroup  != NULL);
-    MA_ASSERT(pSound  != NULL);
-
-    c89atomic_exchange_32(&pSound->isMixing, MA_TRUE);  /* This must be done before checking the isPlaying state. */
-    {
-        if (pSound->isPlaying) {
     ma_result result = MA_SUCCESS;
     ma_uint64 framesProcessed;
 
+    /* Don't do anything if we're not playing. */
+    if (pSound->isPlaying == MA_FALSE) {
+        return;
+    }
+
     /* If we're marked at the end we need to stop the sound and do nothing. */
-            if (!pSound->atEnd) {
+    if (pSound->atEnd) {
+        ma_sound_stop_internal(pSound);
+        return;
+    }
+
     /* If we're seeking, do so now before reading. */
     if (pSound->seekTarget != MA_SEEK_TARGET_NONE) {
         pSound->seekTarget  = MA_SEEK_TARGET_NONE;
@@ -8401,11 +8402,17 @@ static void ma_engine_mix_sound(ma_engine* pEngine, ma_sound_group* pGroup, ma_s
             ma_sound_stop_internal(pSound);
         }
     }
-            } else {
-                /* The sound is at the end. Make sure it's marked as stopped. */
-                ma_sound_stop_internal(pSound);
-            }
-        }
+}
+
+static void ma_engine_mix_sound(ma_engine* pEngine, ma_sound_group* pGroup, ma_sound* pSound, ma_uint64 frameCount)
+{
+    MA_ASSERT(pEngine != NULL);
+    MA_ASSERT(pGroup  != NULL);
+    MA_ASSERT(pSound  != NULL);
+
+    c89atomic_exchange_32(&pSound->isMixing, MA_TRUE);  /* This must be done before checking the isPlaying state. */
+    {
+        ma_engine_mix_sound_internal(pEngine, pGroup, pSound, frameCount);
     }
     c89atomic_exchange_32(&pSound->isMixing, MA_FALSE);
 }