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rockbox/apps/plugins/rockboy/loader.c
Daniel Stenberg 137fb6cb9f Karl Kurbjun's patch #1407719: 
Here's another patch for rockboy that adds automatic frameskip (it's pretty
rough as I haven't figured out an accurate timer), fullscreen support on the
H300, and a bit of assembly and some IRAM stuff. I'm not sure if I'm doing the
IRAM stuff correct though as it doesn't seem to make much of a difference if
any. I've also added a statistics option that will show how many frames per
second the gameboy is seeing (not what the player is getting) and what the
frameskip is at. When you enable stats sometimes you have to go back into the
menu and then come out to clear erronous values.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8397 a1c6a512-1295-4272-9138-f99709370657
2006-01-20 13:05:52 +00:00

383 lines
7.2 KiB
C
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#include <stdio.h>
#include <string.h>
#include "rockmacros.h"
#include "defs.h"
#include "regs.h"
#include "mem.h"
#include "hw.h"
#include "lcd-gb.h"
#include "rtc-gb.h"
#include "rc.h"
#include "save.h"
#include "sound.h"
static int mbc_table[256] =
{
0, 1, 1, 1, 0, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 3,
3, 3, 3, 3, 0, 0, 0, 0, 0, 5, 5, 5, MBC_RUMBLE, MBC_RUMBLE, MBC_RUMBLE, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, MBC_HUC3, MBC_HUC1
};
static int rtc_table[256] =
{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0
};
static int batt_table[256] =
{
0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0,
1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0,
0
};
static int romsize_table[256] =
{
2, 4, 8, 16, 32, 64, 128, 256, 512,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 128, 128, 128
/* 0, 0, 72, 80, 96 -- actual values but bad to use these! */
};
static int ramsize_table[256] =
{
1, 1, 1, 4, 16,
4 /* FIXME - what value should this be?! */
};
static char *romfile;
static char sramfile[500];
static char rtcfile[500];
static char saveprefix[500];
static char *savename;
static int saveslot;
static int forcebatt, nobatt;
static int forcedmg, gbamode;
static int memfill = -1, memrand = -1;
//static byte romMemory[4*1025*1024];
int mp3_buffer_size;
void *bufferpos;
static void initmem(void *mem, int size)
{
char *p = mem;
if (memrand >= 0)
{
srand(memrand ? memrand : -6 ); //time(0));
while(size--) *(p++) = rand();
}
else if (memfill >= 0)
memset(p, memfill, size);
}
static byte *loadfile(int fd, int *len)
{
int c, l = 0, p = 0;
byte *d, buf[512];
d=malloc(32768);
for(;;)
{
c = read(fd, buf, sizeof buf);
if (c <= 0) break;
l += c;
memcpy(d+p, buf, c);
p += c;
}
setmallocpos(d+p+64);
*len = l;
return d;
}
//static byte sram[65536];
int rom_load(void)
{
int fd;
byte c, *data, *header;
int len = 0, rlen;
fd = open(romfile, O_RDONLY);
if (fd<0) {
die("cannot open rom file");
die(romfile);
return 1;
}
data = loadfile(fd, &len);
header = data; // no zip. = decompress(data, &len);
memcpy(rom.name, header+0x0134, 16);
if (rom.name[14] & 0x80) rom.name[14] = 0;
if (rom.name[15] & 0x80) rom.name[15] = 0;
rom.name[16] = 0;
c = header[0x0147];
mbc.type = mbc_table[c];
mbc.batt = (batt_table[c] && !nobatt) || forcebatt;
// mbc.batt = 1; // always store savegame mem.
rtc.batt = rtc_table[c];
mbc.romsize = romsize_table[header[0x0148]];
mbc.ramsize = ramsize_table[header[0x0149]];
if (!mbc.romsize) {
die("unknown ROM size %02X\n", header[0x0148]);
return 1;
}
if (!mbc.ramsize) {
die("unknown SRAM size %02X\n", header[0x0149]);
return 1;
}
rlen = 16384 * mbc.romsize;
rom.bank = (void *) data; //realloc(data, rlen);
if (rlen > len) memset(rom.bank[0]+len, 0xff, rlen - len);
ram.sbank = malloc(8192 * mbc.ramsize);
//ram.ibank = malloc(4096*8);
initmem(ram.sbank, 8192 * mbc.ramsize);
initmem(ram.ibank, 4096 * 8);
mbc.rombank = 1;
mbc.rambank = 0;
c = header[0x0143];
hw.cgb = ((c == 0x80) || (c == 0xc0)) && !forcedmg;
hw.gba = (hw.cgb && gbamode);
close(fd);
return 0;
}
int sram_load(void)
{
int fd;
char meow[500];
if (!mbc.batt || !sramfile || !*sramfile) return -1;
/* Consider sram loaded at this point, even if file doesn't exist */
ram.loaded = 1;
fd = open(sramfile, O_RDONLY);
snprintf(meow,499,"Opening %s %d",sramfile,fd);
rb->splash(HZ*2, true, meow);
if (fd<0) return -1;
snprintf(meow,499,"Loading savedata from %s",sramfile);
rb->splash(HZ*2, true, meow);
read(fd,ram.sbank, 8192*mbc.ramsize);
close(fd);
return 0;
}
int sram_save(void)
{
int fd;
char meow[500];
/* If we crash before we ever loaded sram, DO NOT SAVE! */
if (!mbc.batt || !sramfile || !ram.loaded || !mbc.ramsize)
return -1;
fd = open(sramfile, O_WRONLY|O_CREAT|O_TRUNC);
// snprintf(meow,499,"Opening %s %d",sramfile,fd);
// rb->splash(HZ*2, true, meow);
if (fd<0) return -1;
snprintf(meow,499,"Saving savedata to %s",sramfile);
rb->splash(HZ*2, true, meow);
write(fd,ram.sbank, 8192*mbc.ramsize);
close(fd);
return 0;
}
void state_save(int n)
{
int fd;
char name[500];
if (n < 0) n = saveslot;
if (n < 0) n = 0;
snprintf(name, 499,"%s.%03d", saveprefix, n);
if ((fd = open(name, O_WRONLY|O_CREAT|O_TRUNC)>=0))
{
savestate(fd);
close(fd);
}
}
void state_load(int n)
{
int fd;
char name[500];
if (n < 0) n = saveslot;
if (n < 0) n = 0;
snprintf(name, 499, "%s.%03d", saveprefix, n);
if ((fd = open(name, O_RDONLY)>=0))
{
loadstate(fd);
close(fd);
vram_dirty();
pal_dirty();
sound_dirty();
mem_updatemap();
}
}
void rtc_save(void)
{
int fd;
if (!rtc.batt) return;
if ((fd = open(rtcfile, O_WRONLY|O_CREAT|O_TRUNC))<0) return;
rtc_save_internal(fd);
close(fd);
}
void rtc_load(void)
{
int fd;
if (!rtc.batt) return;
if ((fd = open(rtcfile, O_RDONLY))<0) return;
rtc_load_internal(fd);
close(fd);
}
void loader_unload(void)
{
sram_save();
// if (romfile) free(romfile);
// if (sramfile) free(sramfile);
// if (saveprefix) free(saveprefix);
// if (rom.bank) free(rom.bank);
// if (ram.sbank) free(ram.sbank);
romfile = 0;
rom.bank = 0;
ram.sbank = 0;
mbc.type = mbc.romsize = mbc.ramsize = mbc.batt = 0;
}
/*
static char *base(char *s)
{
char *p;
p = strrchr(s, '/');
if (p) return p+1;
return s;
}
static char *ldup(char *s)
{
int i;
char *n, *p;
p = n = malloc(strlen(s));
for (i = 0; s[i]; i++) if (isalnum(s[i])) *(p++) = tolower(s[i]);
*p = 0;
return n;
}*/
void cleanup(void)
{
sram_save();
rtc_save();
// IDEA - if error, write emergency savestate..?
}
void loader_init(char *s)
{
char *name;
// DIR* dir;
// sys_checkdir(savedir, 1); /* needs to be writable */
/* dir=opendir(savedir); // should be handled when the program opens
if(!dir)
mkdir(savedir,0);
else
closedir(dir);*/
romfile = s;
if(rom_load())
return;
vid_settitle(rom.name);
name = rom.name;
snprintf(saveprefix, 499, "%s/%s", savedir, name);
strcpy(sramfile, saveprefix);
strcat(sramfile, ".sav");
strcpy(rtcfile, saveprefix);
strcat(rtcfile, ".rtc");
sram_load();
rtc_load();
//atexit(cleanup);
}
rcvar_t loader_exports[] =
{
RCV_STRING("savedir", &savedir),
RCV_STRING("savename", &savename),
RCV_INT("saveslot", &saveslot),
RCV_BOOL("forcebatt", &forcebatt),
RCV_BOOL("nobatt", &nobatt),
RCV_BOOL("forcedmg", &forcedmg),
RCV_INT("memfill", &memfill),
RCV_INT("memrand", &memrand),
RCV_END
};
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