audio progress

Author: Niko

decompile/General/CDSYS/CDSYS_00_Init.c

@@ -27,7 +27,10 @@ void DECOMP_CDSYS_Init(int boolUseDisc)
 	sdata->countPass_CdReadyCallback = 0;
 	sdata->countFail_CdReadyCallback = 0;
 	sdata->XA_CurrOffset = 0;
+	
+#if 0 // unused
 	sdata->countPass_CdTransferCallback = 0;
+#endif
 
 	sdata->XA_Playing_Category = 0;
 	sdata->XA_Playing_Index = 0;

decompile/General/CDSYS/CDSYS_08_SpuCallbackTransfer.c

@@ -9,10 +9,11 @@ void DECOMP_CDSYS_SpuCallbackTransfer()
 		sdata->irqAddr = 0;
 
 	SpuSetIRQAddr(sdata->irqAddr);
-	
 	SpuSetIRQ(1);
 
+#if 0 // unused
 	sdata->countPass_CdTransferCallback++;
+#endif
 
 	DECOMP_CDSYS_SpuGetMaxSample();
 }

decompile/General/CDSYS/CDSYS_11_SpuGetMaxSample.c

@@ -12,13 +12,18 @@ void DECOMP_CDSYS_SpuGetMaxSample(void)
     // if you are not using CD, quit
     if (sdata->boolUseDisc == false) return;
 
-    // range {0x0 - 0x100}
+	// irqAddr = 0, index = {0x000 - 0x100}, byteRange = {0x000 - 0x200}, 
+	// irqAddr = 1, index = {0x100 - 0x200}, byteRange = {0x200 - 0x400}, 
+
+	// this irqAddr value changes in CDSYS_SpuCallbackTransfer,
+	// meaning this might always be 1 frame behind, even in retail CTR
+
     if (sdata->irqAddr == 0)
     {
         currIndex = 0;
         endIndex = 0x100;
     }
-    // otherwise, range {0x100 - 0x200}
+	
     else
     {
 		currIndex = 0x100;

decompile/General/CDSYS/CDSYS_15_XAPlay.c

@@ -49,7 +49,10 @@ void DECOMP_CDSYS_XAPlay(int categoryID, int xaID)
 	sdata->countPass_CdReadyCallback = 0;
 	sdata->countFail_CdReadyCallback = 0;
 	sdata->XA_CurrOffset = 0; // ND bug? Variable resuse?
+	
+#if 0 // unused
 	sdata->countPass_CdTransferCallback = 0;
+#endif
 
 	if(CdControl(CdlReadS, &buf2[0], 0) == 1)
 	{