MAME:DSP 指针计算，避免下标再次计算指针

AxibugEmuOnline.Client/Assets/Script/AppMain/Emulator/MameEmulator/UniInterface/UniSoundPlayer.cs

@@ -100,25 +100,29 @@ public class UniSoundPlayer : MonoBehaviour, ISoundPlayer /*, AxiAudioPull*/
         }
     }
 
-    void OnAudioFilterRead(float[] data, int channels)
+    unsafe void OnAudioFilterRead(float[] data, int channels)
     {
         if (!UMAME.bInGame) return;
         int step = channels;
-        for (int i = 0; i < data.Length; i += step)
+        int length = data.Length;
+        fixed (float* dataptr = &data[0])
+        {
+            float* dataptr_index = &dataptr[0];
+            for (int i = 0; i < length; i += step)
             {
                 float rawFloat = lastData;
                 float rawData;
                 if (_buffer.TryRead(out rawData))
-            {
                     rawFloat = rawData;
+                for (int fill = 0; fill < step; fill++)
+                {
+                    *dataptr_index = rawFloat;
+                    dataptr_index++;
                 }
-
-            data[i] = rawFloat;
-            for (int fill = 1; fill < step; fill++)
-                data[i + fill] = rawFloat;
                 lastData = rawFloat;
             }
         }
+    }
 
     public void SubmitSamples(byte[] buffer, int samples_a)
     {