preliminary audio. only supports PSG (and handles all channels as such). drops out every once in a while.

src/SPU.h

@@ -44,21 +44,39 @@ public:
     ~Channel();
     void Reset();
 
+    u32 Num;
+
     u32 Cnt;
     u32 SrcAddr;
     u16 TimerReload;
     u32 LoopPos;
     u32 Length;
 
+    u32 Timer;
+    u32 Pos;
+    s16 CurSample;
+
     void SetCnt(u32 val)
     {
+        if ((val & (1<<31)) && !(Cnt & (1<<31)))
+        {
+            Start();
+        }
+
         Cnt = val & 0xFF7F837F;
+        //if(Num==8)printf("chan %d volume: %d\n", Num, val&0x7F);
     }
 
     void SetSrcAddr(u32 val) { SrcAddr = val & 0x07FFFFFF; }
-    void SetTimerReload(u32 val) { TimerReload = val & 0xFFFF; }
+    void SetTimerReload(u32 val) { TimerReload = val & 0xFFFF;if(Num==8) printf("chan8 timer %04X\n", TimerReload);}
     void SetLoopPos(u32 val) { LoopPos = (val & 0xFFFF) << 2; }
     void SetLength(u32 val) { Length = (val & 0x001FFFFF) << 2; }
+
+    void Start();
+
+    void NextSample_PSG();
+
+    void Run(s32* buf, u32 samples);
 };
 
 }