X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=libpcsxcore%2Fmdec.c;h=ca42458567137d749a93c62e26eb0cfd201dc4db;hb=d5aeda23720ba9374312f8d387f299024fedb7e6;hp=cd8d3bf0013a16343395b61ffa53b48dbf79f3d6;hpb=8e1040b6a82ee1802fda83d4de84290a02656cc0;p=pcsx_rearmed.git

diff --git a/libpcsxcore/mdec.c b/libpcsxcore/mdec.c
index cd8d3bf0..ca424585 100644
--- a/libpcsxcore/mdec.c
+++ b/libpcsxcore/mdec.c
@@ -32,7 +32,12 @@
  * 320x240x16@60Hz => 9.216 MB/s
  * so 2.0 to 4.0 should be fine.
  */
-#define MDEC_BIAS 2.0f
+ 
+/*
+ * >= 10 for Galerians
+ * <= 18 for "Disney's Treasure Planet"
+ */
+#define MDEC_BIAS 10
 
 #define DSIZE			8
 #define DSIZE2			(DSIZE * DSIZE)
@@ -480,7 +485,7 @@ void psxDma0(u32 adr, u32 bcr, u32 chcr) {
 	size = (bcr >> 16) * (bcr & 0xffff);
 
 	switch (cmd >> 28) {
-		case 0x3: // decode
+		case 0x3: // decode 15/24bpp
 			mdec.rl = (u16 *) PSXM(adr);
 			/* now the mdec is busy till all data are decoded */
 			mdec.reg1 |= MDEC1_BUSY;
@@ -488,10 +493,8 @@ void psxDma0(u32 adr, u32 bcr, u32 chcr) {
 			mdec.rl_end = mdec.rl + (size * 2);
 
 			/* sanity check */
-			if(mdec.rl_end <= mdec.rl) {
-				MDECINDMA_INT( size / 4 );
-				return;
-			}
+			if(mdec.rl_end <= mdec.rl)
+				break;
 
 			/* process the pending dma1 */
 			if(mdec.pending_dma1.adr){
@@ -510,23 +513,18 @@ void psxDma0(u32 adr, u32 bcr, u32 chcr) {
 				iqtab_init(iq_y, p);
 				iqtab_init(iq_uv, p + 64);
 			}
-
-			MDECINDMA_INT( size / 4 );
-      return;
+			break;
 
 		case 0x6: // cosine table
 			// printf("mdec cosine table\n");
-
-			MDECINDMA_INT( size / 4 );
-      return;
+			break;
 
 		default:
-			// printf("mdec unknown command\n");
+			log_unhandled("mdec: unknown command %08x\n", cmd);
 			break;
 	}
 
-	HW_DMA0_CHCR &= SWAP32(~0x01000000);
-	DMA_INTERRUPT(0);
+	MDECINDMA_INT(size);
 }
 
 void mdec0Interrupt()
@@ -545,15 +543,13 @@ void psxDma1(u32 adr, u32 bcr, u32 chcr) {
 	int blk[DSIZE2 * 6];
 	u8 * image;
 	int size;
-	int dmacnt;
+	u32 words;
 
 	if (chcr != 0x01000200) return;
 
-	size = (bcr >> 16) * (bcr & 0xffff);
+	words = (bcr >> 16) * (bcr & 0xffff);
 	/* size in byte */
-	size *= 4;
-	/* I guess the memory speed is limitating */
-	dmacnt = size;
+	size = words * 4;
 
 	if (!(mdec.reg1 & MDEC1_BUSY)) {
 		/* add to pending */
@@ -624,8 +620,10 @@ void psxDma1(u32 adr, u32 bcr, u32 chcr) {
 		}
 	}
 	
-	/* define the power of mdec */
-	MDECOUTDMA_INT((int) ((dmacnt* MDEC_BIAS)));
+		/* define the power of mdec */
+		MDECOUTDMA_INT(words * MDEC_BIAS);
+		/* some CPU stalling */
+		psxRegs.cycle += words;
 	}
 }
 
@@ -671,7 +669,7 @@ void mdec1Interrupt() {
 	}
 }
 
-int mdecFreeze(gzFile f, int Mode) {
+int mdecFreeze(void *f, int Mode) {
 	u8 *base = (u8 *)&psxM[0x100000];
 	u32 v;