psxcounters: merge shalma's suggestion

[pcsx_rearmed.git] / libpcsxcore / cdrom.c

diff --git a/libpcsxcore/cdrom.c b/libpcsxcore/cdrom.c
index 0de7ecc..cc377b9 100644 (file)
--- a/libpcsxcore/cdrom.c
+++ b/libpcsxcore/cdrom.c
@@ -709,11 +709,12 @@ void cdrInterrupt() {
                        Wild 9: skip PREGAP + starting accurate SubQ
                        - plays tracks without retry play
                        */
+                       /* unneeded with correct cdriso?
                        Set_Track();
+                       */
                        Find_CurTrack();
                        ReadTrack( cdr.SetSectorPlay );
 
-
                        // GameShark CD Player: Calls 2x + Play 2x
                        if( cdr.FastBackward || cdr.FastForward ) {
                                if( cdr.FastForward ) cdr.FastForward--;
@@ -988,10 +989,9 @@ void cdrInterrupt() {
                        }
 
                        // redump.org - wipe time
-                       /*if( !cdr.Play && CheckSBI(cdr.Result+5) ) {
+                       if( !cdr.Play && CheckSBI(cdr.Result+5) ) {
                                memset( cdr.Result+2, 0, 6 );
                        }
-                       */
 
                        cdr.Stat = Acknowledge;
                        break;
@@ -1217,7 +1217,8 @@ void cdrInterrupt() {
                        // - fixes cutscene speech
                        {
                                u8 *buf = CDR_getBuffer();
-                               memcpy(cdr.Transfer, buf, 8);
+                               if (buf != NULL)
+                                       memcpy(cdr.Transfer, buf, 8);
                        }
                        
                        
@@ -1331,11 +1332,14 @@ void cdrReadInterrupt() {
                                SPU_playADPCMchannel(&cdr.Xa);
                                cdr.FirstSector = 0;
 
-
+#if 0
                                // Crash Team Racing: music, speech
+                               // - done using cdda decoded buffer (spu irq)
+                               // - don't do here
 
                                // signal ADPCM data ready
                                psxHu32ref(0x1070) |= SWAP32((u32)0x200);
+#endif
                        }
                        else cdr.FirstSector = -1;
                }
@@ -1898,11 +1902,15 @@ void cdrWrite3(unsigned char rt) {
                // - Final Fantasy Tactics
                // - various other games
 
-               /*
                if (cdr.Reading && !cdr.ResultReady) {
-                       CDREAD_INT((cdr.Mode & MODE_SPEED) ? (cdReadTime / 2) : cdReadTime);
+                       int left = psxRegs.intCycle[PSXINT_CDREAD].sCycle + psxRegs.intCycle[PSXINT_CDREAD].cycle - psxRegs.cycle;
+                       int time = (cdr.Mode & MODE_SPEED) ? (cdReadTime / 2) : cdReadTime;
+                       if (Config.CdrReschedule != 2)
+                       if (left < time / 2 || Config.CdrReschedule) { // rearmed guesswork hack
+                               //printf("-- resched %d -> %d\n", left, time);
+                               CDREAD_INT(time);
+                       }
                }
-               */
 
                return;
        }
@@ -1929,6 +1937,7 @@ void cdrWrite3(unsigned char rt) {
 
 void psxDma3(u32 madr, u32 bcr, u32 chcr) {
        u32 cdsize;
+       int size;
        u8 *ptr;
 
 #ifdef CDR_LOG
@@ -1973,15 +1982,12 @@ void psxDma3(u32 madr, u32 bcr, u32 chcr) {
                        - CdlPlay
                        - Spams DMA3 and gets buffer overrun
                        */
-
-                       if( (cdr.pTransfer-cdr.Transfer) + cdsize > 2352 )
-                       {
-                               // avoid crash - probably should wrap here
-                               //memcpy(ptr, cdr.pTransfer, cdsize);
-                       }
-                       else
+                       size = CD_FRAMESIZE_RAW - (cdr.pTransfer - cdr.Transfer);
+                       if (size > cdsize)
+                               size = cdsize;
+                       if (size > 0)
                        {
-                               memcpy(ptr, cdr.pTransfer, cdsize);
+                               memcpy(ptr, cdr.pTransfer, size);
                        }
 
                        psxCpu->Clear(madr, cdsize / 4);
@@ -2010,8 +2016,11 @@ void psxDma3(u32 madr, u32 bcr, u32 chcr) {
 
 void cdrDmaInterrupt()
 {
-       HW_DMA3_CHCR &= SWAP32(~0x01000000);
-       DMA_INTERRUPT(3);
+       if (HW_DMA3_CHCR & SWAP32(0x01000000))
+       {
+               HW_DMA3_CHCR &= SWAP32(~0x01000000);
+               DMA_INTERRUPT(3);
+       }
 }
 
 void cdrReset() {