drc: something works on arm64

[pcsx_rearmed.git] / libpcsxcore / mdec.c

diff --git a/libpcsxcore/mdec.c b/libpcsxcore/mdec.c
index bed4e53..61ed5ea 100644 (file)
--- a/libpcsxcore/mdec.c
+++ b/libpcsxcore/mdec.c
@@ -32,7 +32,14 @@
  * 320x240x16@60Hz => 9.216 MB/s
  * so 2.0 to 4.0 should be fine.
  */
-#define MDEC_BIAS 2.0f
+ 
+/* Was set to 2 before but it would cause issues in R-types and Vandal Hearts videos. 
+ * Setting it to 6 as dmitrysmagin did fix those... except for Galerians.
+ * Galerians needs this to be set to 10 (!!) before it looks properly.
+ * I've tried this with a few other games (including R-Types) and so far, this
+ * has not backfired.
+ * */
+#define MDEC_BIAS 10
 
 #define DSIZE                  8
 #define DSIZE2                 (DSIZE * DSIZE)
@@ -545,15 +552,13 @@ 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 */
@@ -625,7 +630,7 @@ void psxDma1(u32 adr, u32 bcr, u32 chcr) {
        }
        
        /* define the power of mdec */
-       MDECOUTDMA_INT((int) ((dmacnt* MDEC_BIAS)));
+       MDECOUTDMA_INT(words * MDEC_BIAS);
        }
 }