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snes9xgx/source/ngc/memfile.cpp
michniewski edf269f97d - added: option to disable AA filtering (snes graphics 'crisper', AA now default OFF) 
- added: mapped zooming and turbo mode to classic controller
- added: preliminary usb support (loading)
- changed: sram and freezes now saved by filename, not internal romname. If you have multiple versions of the same game, you can now have srams and freezes for each version. A prompt to convert to the new naming is provided for sram only.
- changed: by default, autoload/save sram and freeze enabled
2008-08-06 02:31:44 +00:00

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/****************************************************************************
* Snes9x 1.50 - GX 2.0
*
* NGC Snapshots Memory File System
*
* This is a single global memory file controller. Don't even think of opening two
* at the same time !
*
* There's just enough here to do SnapShots - you should add anything else you
* need.
*
* softdev July 2006
* crunchy2 May 2007-July 2007
****************************************************************************/
#include <gccore.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fat.h>
#include <zlib.h>
#include "memfile.h"
#include "snes9x.h"
#include "memmap.h"
#include "soundux.h"
#include "snapshot.h"
#include "srtc.h"
#include "Snes9xGx.h"
#include "filesel.h"
#include "ftfont.h"
#include "smbload.h"
#include "mcsave.h"
extern "C"
{
#include "smb.h"
}
#define MEMBUFFER (512 * 1024)
extern void S9xSRTCPreSaveState ();
extern void NGCFreezeStruct ();
extern bool8 S9xUnfreezeGame (const char *filename);
extern unsigned char savebuffer[];
static int bufoffset;
static char membuffer[MEMBUFFER];
char freezecomment[2][32] = { {"Snes9x GX 004 Freeze"}, {"Freeze"} };
/**
* GetMem
*
* Return x bytes from memory buffer
*/
int
GetMem (char *buffer, int len)
{
memcpy (buffer, membuffer + bufoffset, len);
bufoffset += len;
return len;
}
/**
* PutMem
*
* Put some values in memory buffer
*/
static void
PutMem (char *buffer, int len)
{
memcpy (membuffer + bufoffset, buffer, len);
bufoffset += len;
}
void
NGCFreezeBlock (char *name, uint8 * block, int size)
{
char buffer[512];
// char msg[90];
// sprintf (msg, "name=%s", name);
// WaitPrompt(msg);
sprintf (buffer, "%s:%06d:", name, size);
PutMem (buffer, strlen (buffer));
PutMem ((char *) block, size);
}
/**
* NGCFreezeMembuffer
*/
static int
NGCFreezeMemBuffer ()
{
int i;
char buffer[1024];
bufoffset = 0;
S9xUpdateRTC ();
S9xSRTCPreSaveState ();
for (i = 0; i < 8; i++)
{
SoundData.channels[i].previous16[0] =
(int16) SoundData.channels[i].previous[0];
SoundData.channels[i].previous16[1] =
(int16) SoundData.channels[i].previous[1];
}
sprintf (buffer, "%s:%04d\n", SNAPSHOT_MAGIC, SNAPSHOT_VERSION);
PutMem (buffer, strlen (buffer));
sprintf (buffer, "NAM:%06d:%s%c", (int) strlen (Memory.ROMFilename) + 1,
Memory.ROMFilename, 0);
PutMem (buffer, strlen (buffer) + 1);
NGCFreezeStruct ();
return 0;
}
/**
* NGCFreezeGame
*
* Do freeze game for Nintendo Gamecube
*/
int
NGCFreezeGame (int where, bool8 silent)
{
char filename[1024];
SMBFILE smbfile;
FILE *handle;
int len = 0;
int wrote = 0;
int offset = 0;
char msg[100];
if (where == 4)
{
/*** Freeze to SMB ***/
sprintf (filename, "/%s/%s.frz", SNESSAVEDIR, Memory.ROMFilename);
}
else if (where == 2 || where == 3)
{
/*** Freeze to SDCard in slot A or slot B ***/
#ifdef SDUSE_LFN
sprintf (filename, "%s/%s/%s.frz", ROOTSDDIR, SNESSAVEDIR, Memory.ROMFilename);
#else
/*** Until we have LFN on SD ... ***/
sprintf (filename, "%s/%s/%08x.frz", ROOTSDDIR, SNESSAVEDIR, Memory.ROMCRC32);
#endif
}
else
{
/*** Freeze to MC in slot A or slot B ***/
sprintf (filename, "%s.snz", Memory.ROMFilename);
}
S9xSetSoundMute (TRUE);
S9xPrepareSoundForSnapshotSave (FALSE);
NGCFreezeMemBuffer ();
S9xPrepareSoundForSnapshotSave (TRUE);
S9xSetSoundMute (FALSE);
if (where == 4) /*** SMB ***/
{
ConnectSMB ();
smbfile = SMB_Open (filename, SMB_OPEN_WRITING | SMB_DENY_NONE,
SMB_OF_CREATE | SMB_OF_TRUNCATE);
if (smbfile)
{
if (!silent)
ShowAction ((char*) "Saving freeze game...");
len = bufoffset;
offset = 0;
while (len > 0)
{
if (len > 1024)
wrote =
SMB_Write ((char *) membuffer + offset, 1024, offset,
smbfile);
else
wrote =
SMB_Write ((char *) membuffer + offset, len, offset,
smbfile);
offset += wrote;
len -= wrote;
}
SMB_Close (smbfile);
if ( !silent )
{
sprintf (filename, "Written %d bytes", bufoffset);
WaitPrompt (filename);
}
}
else
{
char msg[100];
sprintf(msg, "Couldn't save to SMB:\\%s\\", SNESSAVEDIR);
WaitPrompt (msg);
}
}
else if (where == 2 || where == 3) /*** SDCard slot A or slot B ***/
{
handle = fopen (filename, "wb");
if (handle > 0)
{
if (!silent)
ShowAction ((char*) "Saving freeze game...");
len = fwrite (membuffer, 1, bufoffset, handle);
fclose (handle);
if (len != bufoffset)
WaitPrompt((char*) "Error writing freeze file");
else if ( !silent )
{
sprintf (filename, "Written %d bytes", bufoffset);
WaitPrompt (filename);
}
}
else
{
sprintf(msg, "Couldn't save to %s/%s/", ROOTSDDIR, SNESSAVEDIR);
WaitPrompt (msg);
}
}
else /*** MC in slot A or slot B ***/
{
if (!silent)
ShowAction ((char*) "Saving freeze game...");
ClearSaveBuffer ();
/*** Copy in save icon ***/
int offset = sizeof (saveicon);
memcpy (savebuffer, saveicon, offset);
/*** And the freezecomment ***/
sprintf (freezecomment[1], "%s", Memory.ROMName);
memcpy (savebuffer + offset, freezecomment, 64);
offset += 64;
/*** Zip and copy in the freeze ***/
uLongf DestBuffSize = (uLongf) SAVEBUFFERSIZE;
int err= compress2((Bytef*)(savebuffer+offset+8), (uLongf*)&DestBuffSize, (const Bytef*)membuffer, (uLongf)bufoffset, Z_BEST_COMPRESSION);
if(err!=Z_OK)
{
sprintf (msg, "zip error %s ",zError(err));
WaitPrompt (msg);
return 0;
}
int zippedsize = (int)DestBuffSize;
memcpy (savebuffer + offset, &zippedsize, 4);
offset += 4;
int decompressedsize = (int)bufoffset;
memcpy (savebuffer + offset, &decompressedsize, 4);
offset += 4;
offset += zippedsize;
int ret = SaveBufferToMC ( savebuffer, where, filename, offset, SILENT );
if ( ret && !silent )
{
sprintf (filename, "Written %d bytes", ret);
WaitPrompt (filename);
}
}
return 0;
}
/**
* NGCUnFreezeBlock
*/
int
NGCUnFreezeBlock (char *name, uint8 * block, int size)
{
char buffer[20], *e;
int len = 0;
int rem = 0;
GetMem (buffer, 11);
if (strncmp (buffer, name, 3) != 0 || buffer[3] != ':' ||
buffer[10] != ':' || (len = strtol (&buffer[4], &e, 10)) == 0 ||
e != buffer + 10)
{
return WRONG_FORMAT;
}
if (len > size)
{
rem = len - size;
len = size;
}
ZeroMemory (block, size);
GetMem ((char *) block, len);
if (rem)
{
bufoffset += rem;
}
return SUCCESS;
}
/**
* NGCUnfreezeGame
*/
int
NGCUnfreezeGame (int from, bool8 silent)
{
char filename[1024];
SMBFILE smbfile;
FILE *handle;
int read = 0;
int offset = 0;
char msg[80];
bufoffset = 0;
if (from == 4)
{
/*** From SMB ***/
sprintf (filename, "\\%s\\%s.frz", SNESSAVEDIR, Memory.ROMFilename);
ConnectSMB ();
/*** Read the file into memory ***/
smbfile =
SMB_Open (filename, SMB_OPEN_READING | SMB_DENY_NONE, SMB_OF_OPEN);
if (smbfile)
{
ShowAction ((char*) "Loading freeze file...");
while ((read =
SMB_Read ((char *) membuffer + offset, 1024, offset,
smbfile)) > 0)
offset += read;
SMB_Close (smbfile);
ShowAction ((char*) "Unpacking freeze file");
if (S9xUnfreezeGame ("AGAME") != SUCCESS)
{
WaitPrompt((char*) "Error thawing");
return 0;
}
}
else if ( !silent )
{
WaitPrompt((char*) "No freeze file found");
return 0;
}
}
else if (from == 2 || from == 3) /*** From SD slot A or slot B ***/
{
#ifdef SDUSE_LFN
sprintf (filename, "%s/%s/%s.frz", ROOTSDDIR, SNESSAVEDIR, Memory.ROMFilename);
#else
/*** From SDCard ***/
sprintf (filename, "%s/%s/%08x.frz", ROOTSDDIR, SNESSAVEDIR, Memory.ROMCRC32);
#endif
handle = fopen (filename, "rb");
if (handle > 0)
{
ShowAction ((char*) "Loading freeze file...");
offset = 0;
/*** Usual chunks into memory ***/
while ((read = fread (membuffer + offset, 1, 2048, handle)) >
0)
offset += read;
fclose (handle);
ShowAction ((char*) "Unpacking freeze file");
if (S9xUnfreezeGame ("AGAME") != SUCCESS)
{
WaitPrompt((char*) "Error thawing");
return 0;
}
}
else if ( !silent )
{
WaitPrompt((char*) "No freeze file found");
return 0;
}
}
else /*** From MC in slot A or slot B ***/
{
ShowAction ((char*) "Loading freeze file...");
sprintf (filename, "%s.snz", Memory.ROMFilename);
int ret = LoadBufferFromMC ( savebuffer, from, filename, silent );
if ( ret )
{
ShowAction ((char*) "Unpacking freeze file");
// skip the saveicon and comment
offset = (sizeof(saveicon) + 64);
uLongf zipsize = 0;
uLongf decompressedsize = 0;
memcpy (&zipsize, savebuffer+offset, 4);
offset += 4;
memcpy (&decompressedsize, savebuffer+offset, 4);
offset += 4;
memset(membuffer, 0, MEMBUFFER);
uLongf DestBuffSize = MEMBUFFER;
int err= uncompress((Bytef*)membuffer, (uLongf*)&DestBuffSize, (const Bytef*)(savebuffer + offset), zipsize);
if ( err!=Z_OK )
{
sprintf (msg, "unzip error %s ",zError(err));
WaitPrompt (msg);
return 0;
}
if ( DestBuffSize != decompressedsize )
{
WaitPrompt((char*) "Unzipped size doesn't match expected size!");
return 0;
}
if (S9xUnfreezeGame ("AGAME") != SUCCESS)
{
WaitPrompt((char*) "Error thawing");
return 0;
}
}
else if ( !silent )
{
sprintf(msg, "Couldn't load from MC slot %s", (from ? "B" : "A"));
WaitPrompt (msg);
return 0;
}
}
return 1;
}
void quickLoadFreeze (bool8 silent)
{
if ( QUICK_SAVE_SLOT >= 0 )
NGCUnfreezeGame ( QUICK_SAVE_SLOT, silent );
}
void quickSaveFreeze (bool8 silent)
{
if ( QUICK_SAVE_SLOT >= 0 )
NGCFreezeGame ( QUICK_SAVE_SLOT, silent );
}
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