* 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)
int size;
if (chcr != 0x01000201) {
+ log_unhandled("mdec0: invalid dma %08x\n", chcr);
return;
}
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;
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){
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()
int blk[DSIZE2 * 6];
u8 * image;
int size;
- int dmacnt;
+ u32 words;
- if (chcr != 0x01000200) return;
+ if (chcr != 0x01000200) {
+ log_unhandled("mdec1: invalid dma %08x\n", chcr);
+ 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 */
}
}
- /* 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;
}
}