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zstate.c
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zstate.c
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/*
Copyright (C) 1997-2008 ZSNES Team ( zsKnight, _Demo_, pagefault, Nach )
http://www.zsnes.com
http://sourceforge.net/projects/zsnes
https://zsnes.bountysource.com
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef __UNIXSDL__
#include "gblhdr.h"
#else
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <zlib.h>
#ifdef __WIN32__
#include <io.h>
#else
#include <unistd.h>
#endif
#endif
#include "asm_call.h"
#include "c_vcache.h"
#include "cfg.h"
#include "chips/c4proc.h"
#include "chips/msu1emu.h"
#include "chips/dsp4emu.h"
#include "chips/sa1regs.h"
#include "cpu/execute.h"
#include "cpu/regs.h"
#include "cpu/regsw.h"
#include "cpu/spc700.h"
#include "endmem.h"
#include "gblvars.h"
#include "gui/c_guiwindp.h"
#include "init.h"
#include "initc.h"
#include "input.h"
#include "ui.h"
#include "video/procvid.h"
#include "zmovie.h"
#include "zpath.h"
#include "zstate.h"
#include <stdarg.h>
#define NUMCONV_FR3
#define NUMCONV_FW3
#include "numconv.h"
#ifdef __MSDOS__
#define clim() __asm__ __volatile__("cli");
#define stim() __asm__ __volatile__("sti");
#else
#define clim()
#define stim()
#endif
void SA1UpdateDPageC(), unpackfunct(), repackfunct();
void PrepareOffset(), ResetOffset(), initpitch(), UpdateBanksSDD1();
void procexecloop();
void copy_spc7110_state_data(uint8_t**, void (*)(unsigned char**, void*, size_t), bool);
extern uint8_t intrset, cycpl, cycphb, xdbt, xpbt;
extern uint8_t xirqb, curnmi;
extern uint16_t stackand, stackor, xat, xst, xdt, xxt, xyt;
u4 Totalbyteloaded;
static void copy_snes_data(uint8_t** buffer, void (*copy_func)(uint8_t**, void*, size_t))
{
// 65816 status, etc.
copy_func(buffer, &curcyc, 1);
copy_func(buffer, &curypos, 2);
copy_func(buffer, &cacheud, 1);
copy_func(buffer, &ccud, 1);
copy_func(buffer, &intrset, 1);
copy_func(buffer, &cycpl, 1);
copy_func(buffer, &cycphb, 1);
copy_func(buffer, &spcon, 1);
copy_func(buffer, &stackand, 2);
copy_func(buffer, &stackor, 2);
copy_func(buffer, &xat, 2);
copy_func(buffer, &xdbt, 1);
copy_func(buffer, &xpbt, 1);
copy_func(buffer, &xst, 2);
copy_func(buffer, &xdt, 2);
copy_func(buffer, &xxt, 2);
copy_func(buffer, &xyt, 2);
copy_func(buffer, &xp, 1);
copy_func(buffer, &xe, 1);
copy_func(buffer, &xpc, 2);
copy_func(buffer, &xirqb, 1);
copy_func(buffer, &debugger, 1);
copy_func(buffer, &Curtableaddr, 4);
copy_func(buffer, &curnmi, 1);
// SPC Timers
copy_func(buffer, &cycpbl, 4);
copy_func(buffer, &cycpblt, 4);
// SNES PPU Register status
copy_func(buffer, &sndrot, 3019);
}
static void copy_spc_data(uint8_t** buffer, void (*copy_func)(uint8_t**, void*, size_t))
{
// SPC stuff, DSP stuff
copy_func(buffer, SPCRAM, PHspcsave);
copy_func(buffer, BRRBuffer, PHdspsave);
copy_func(buffer, &DSPMem, sizeof(DSPMem));
}
static void copy_extra_data(uint8_t** buffer, void (*copy_func)(uint8_t**, void*, size_t))
{
copy_func(buffer, &soundcycleft, 4);
copy_func(buffer, &curexecstate, 4);
copy_func(buffer, &nmiprevaddrl, 4);
copy_func(buffer, &nmiprevaddrh, 4);
copy_func(buffer, &nmirept, 4);
copy_func(buffer, &nmiprevline, 4);
copy_func(buffer, &nmistatus, 4);
copy_func(buffer, &joycontren, 4);
copy_func(buffer, &NextLineCache, 1);
copy_func(buffer, &spc700read, 10 * 4);
copy_func(buffer, &timer2upd, 4);
copy_func(buffer, &xa, 14 * 4);
copy_func(buffer, &spcnumread, 1);
copy_func(buffer, &opcd, 6 * 4);
copy_func(buffer, &HIRQCycNext, 4);
copy_func(buffer, &HIRQNextExe, 1);
copy_func(buffer, &oamaddr, 14 * 4);
copy_func(buffer, &prevoamptr, 1);
}
static size_t load_save_size;
enum copy_state_method { csm_save_zst_new,
csm_load_zst_new,
csm_load_zst_old,
csm_save_rewind,
csm_load_rewind };
static void copy_state_data(uint8_t* buffer, void (*copy_func)(uint8_t**, void*, size_t), enum copy_state_method method)
{
copy_snes_data(&buffer, copy_func);
// WRAM (128k), VRAM (64k)
copy_func(&buffer, wramdata, 8192 * 16);
copy_func(&buffer, vram, 4096 * 16);
if (spcon) {
copy_spc_data(&buffer, copy_func);
/*
if (buffer) //Rewind stuff
{
copy_func(&buffer, &echoon0, PHdspsave2);
}
*/
}
if (C4Enable) {
copy_func(&buffer, C4Ram, 2048 * 4);
}
if (SFXEnable) {
copy_func(&buffer, sfxramdata, 8192 * 16);
copy_func(&buffer, &SfxR0, PHnum2writesfxreg);
}
if (SA1Enable) {
copy_func(&buffer, &SA1Mode, PHnum2writesa1reg);
copy_func(&buffer, SA1RAMArea, 8192 * 16);
if (method != csm_load_zst_old) {
copy_func(&buffer, &SA1Status, 3);
copy_func(&buffer, &SA1xpc, 1 * 4);
copy_func(&buffer, &sa1dmaptr, 2 * 4);
}
}
if (DSP1Enable && (method != csm_load_zst_old)) {
copy_func(&buffer, &DSP1COp, 70 + 128);
copy_func(&buffer, &Op00Multiplicand, 3 * 4 + 128);
copy_func(&buffer, &Op10Coefficient, 4 * 4 + 128);
copy_func(&buffer, &Op04Angle, 4 * 4 + 128);
copy_func(&buffer, &Op08X, 5 * 4 + 128);
copy_func(&buffer, &Op18X, 5 * 4 + 128);
copy_func(&buffer, &Op28X, 4 * 4 + 128);
copy_func(&buffer, &Op0CA, 5 * 4 + 128);
copy_func(&buffer, &Op02FX, 11 * 4 + 3 * 4 + 28 * 8 + 128);
copy_func(&buffer, &Op0AVS, 5 * 4 + 14 * 8 + 128);
copy_func(&buffer, &Op06X, 6 * 4 + 10 * 8 + 4 + 128);
copy_func(&buffer, &Op01m, 4 * 4 + 128);
copy_func(&buffer, &Op0DX, 6 * 4 + 128);
copy_func(&buffer, &Op03F, 6 * 4 + 128);
copy_func(&buffer, &Op14Zr, 9 * 4 + 128);
copy_func(&buffer, &Op0EH, 4 * 4 + 128);
}
if (SETAEnable) {
copy_func(&buffer, setaramdata, 256 * 16);
// Todo: copy the SetaCmdEnable? For completeness we should do it
// but currently we ignore it anyway.
}
if (SPC7110Enable) {
copy_func(&buffer, &SPCMultA, PHnum2writespc7110reg);
copy_spc7110_state_data(&buffer, copy_func, (method == csm_load_zst_new) || (method == csm_load_rewind));
}
if (DSP4Enable) {
copy_func(&buffer, &DSP4.waiting4command, sizeof(DSP4.waiting4command));
copy_func(&buffer, &DSP4.half_command, sizeof(DSP4.half_command));
copy_func(&buffer, &DSP4.command, sizeof(DSP4.command));
copy_func(&buffer, &DSP4.in_count, sizeof(DSP4.in_count));
copy_func(&buffer, &DSP4.in_index, sizeof(DSP4.in_index));
copy_func(&buffer, &DSP4.out_count, sizeof(DSP4.out_count));
copy_func(&buffer, &DSP4.out_index, sizeof(DSP4.out_index));
copy_func(&buffer, &DSP4.parameters, sizeof(DSP4.parameters));
copy_func(&buffer, &DSP4.output, sizeof(DSP4.output));
copy_func(&buffer, &DSP4_vars.DSP4_Logic, sizeof(DSP4_vars.DSP4_Logic));
copy_func(&buffer, &DSP4_vars.lcv, sizeof(DSP4_vars.lcv));
copy_func(&buffer, &DSP4_vars.distance, sizeof(DSP4_vars.distance));
copy_func(&buffer, &DSP4_vars.raster, sizeof(DSP4_vars.raster));
copy_func(&buffer, &DSP4_vars.segments, sizeof(DSP4_vars.segments));
copy_func(&buffer, &DSP4_vars.world_x, sizeof(DSP4_vars.world_x));
copy_func(&buffer, &DSP4_vars.world_y, sizeof(DSP4_vars.world_y));
copy_func(&buffer, &DSP4_vars.world_dx, sizeof(DSP4_vars.world_dx));
copy_func(&buffer, &DSP4_vars.world_dy, sizeof(DSP4_vars.world_dy));
copy_func(&buffer, &DSP4_vars.world_ddx, sizeof(DSP4_vars.world_ddx));
copy_func(&buffer, &DSP4_vars.world_ddy, sizeof(DSP4_vars.world_ddy));
copy_func(&buffer, &DSP4_vars.world_xenv, sizeof(DSP4_vars.world_xenv));
copy_func(&buffer, &DSP4_vars.world_yofs, sizeof(DSP4_vars.world_yofs));
copy_func(&buffer, &DSP4_vars.view_x1, sizeof(DSP4_vars.view_x1));
copy_func(&buffer, &DSP4_vars.view_y1, sizeof(DSP4_vars.view_y1));
copy_func(&buffer, &DSP4_vars.view_x2, sizeof(DSP4_vars.view_x2));
copy_func(&buffer, &DSP4_vars.view_y2, sizeof(DSP4_vars.view_y2));
copy_func(&buffer, &DSP4_vars.view_dx, sizeof(DSP4_vars.view_dx));
copy_func(&buffer, &DSP4_vars.view_dy, sizeof(DSP4_vars.view_dy));
copy_func(&buffer, &DSP4_vars.view_xofs1, sizeof(DSP4_vars.view_xofs1));
copy_func(&buffer, &DSP4_vars.view_yofs1, sizeof(DSP4_vars.view_yofs1));
copy_func(&buffer, &DSP4_vars.view_xofs2, sizeof(DSP4_vars.view_xofs2));
copy_func(&buffer, &DSP4_vars.view_yofs2, sizeof(DSP4_vars.view_yofs2));
copy_func(&buffer, &DSP4_vars.view_yofsenv, sizeof(DSP4_vars.view_yofsenv));
copy_func(&buffer, &DSP4_vars.view_turnoff_x, sizeof(DSP4_vars.view_turnoff_x));
copy_func(&buffer, &DSP4_vars.view_turnoff_dx, sizeof(DSP4_vars.view_turnoff_dx));
copy_func(&buffer, &DSP4_vars.viewport_cx, sizeof(DSP4_vars.viewport_cx));
copy_func(&buffer, &DSP4_vars.viewport_cy, sizeof(DSP4_vars.viewport_cy));
copy_func(&buffer, &DSP4_vars.viewport_left, sizeof(DSP4_vars.viewport_left));
copy_func(&buffer, &DSP4_vars.viewport_right, sizeof(DSP4_vars.viewport_right));
copy_func(&buffer, &DSP4_vars.viewport_top, sizeof(DSP4_vars.viewport_top));
copy_func(&buffer, &DSP4_vars.viewport_bottom, sizeof(DSP4_vars.viewport_bottom));
copy_func(&buffer, &DSP4_vars.sprite_x, sizeof(DSP4_vars.sprite_x));
copy_func(&buffer, &DSP4_vars.sprite_y, sizeof(DSP4_vars.sprite_y));
copy_func(&buffer, &DSP4_vars.sprite_attr, sizeof(DSP4_vars.sprite_attr));
copy_func(&buffer, &DSP4_vars.sprite_size, sizeof(DSP4_vars.sprite_size));
copy_func(&buffer, &DSP4_vars.sprite_clipy, sizeof(DSP4_vars.sprite_clipy));
copy_func(&buffer, &DSP4_vars.sprite_count, sizeof(DSP4_vars.sprite_count));
copy_func(&buffer, &DSP4_vars.poly_clipLf, sizeof(DSP4_vars.poly_clipLf));
copy_func(&buffer, &DSP4_vars.poly_clipRt, sizeof(DSP4_vars.poly_clipRt));
copy_func(&buffer, &DSP4_vars.poly_ptr, sizeof(DSP4_vars.poly_ptr));
copy_func(&buffer, &DSP4_vars.poly_raster, sizeof(DSP4_vars.poly_raster));
copy_func(&buffer, &DSP4_vars.poly_top, sizeof(DSP4_vars.poly_top));
copy_func(&buffer, &DSP4_vars.poly_bottom, sizeof(DSP4_vars.poly_bottom));
copy_func(&buffer, &DSP4_vars.poly_cx, sizeof(DSP4_vars.poly_cx));
copy_func(&buffer, &DSP4_vars.poly_start, sizeof(DSP4_vars.poly_start));
copy_func(&buffer, &DSP4_vars.poly_plane, sizeof(DSP4_vars.poly_plane));
copy_func(&buffer, &DSP4_vars.OAM_attr, sizeof(DSP4_vars.OAM_attr));
copy_func(&buffer, &DSP4_vars.OAM_index, sizeof(DSP4_vars.OAM_index));
copy_func(&buffer, &DSP4_vars.OAM_bits, sizeof(DSP4_vars.OAM_bits));
copy_func(&buffer, &DSP4_vars.OAM_RowMax, sizeof(DSP4_vars.OAM_RowMax));
copy_func(&buffer, &DSP4_vars.OAM_Row, sizeof(DSP4_vars.OAM_Row));
}
if(MSUEnable) {
copy_func(&buffer, &MSU_Track_Position, sizeof(MSU_Track_Position));
copy_func(&buffer, &MSU_StatusRead, sizeof(MSU_StatusRead));
copy_func(&buffer, &MSU_MusicVolume, sizeof(MSU_MusicVolume));
}
if (method != csm_load_zst_old) {
copy_extra_data(&buffer, copy_func);
// We don't load SRAM from new states if box isn't checked
if ((method != csm_load_zst_new) || SRAMState) {
copy_func(&buffer, sram, ramsize);
}
if ((method == csm_save_rewind) || (method == csm_load_rewind)) {
copy_func(&buffer, &tempesi, 4);
copy_func(&buffer, &tempedi, 4);
copy_func(&buffer, &tempedx, 4);
copy_func(&buffer, &tempebp, 4);
}
}
}
static void memcpyinc(uint8_t** dest, void* src, size_t len)
{
memcpy(*dest, src, len);
*dest += len;
}
static void memcpyrinc(uint8_t** src, void* dest, size_t len)
{
memcpy(dest, *src, len);
*src += len;
}
extern uint32_t RewindTimer, DblRewTimer;
uint8_t* StateBackup = 0;
uint8_t AllocatedRewindStates, LatestRewindPos, EarliestRewindPos;
bool RewindPosPassed;
size_t rewind_state_size, cur_zst_size, old_zst_size;
void zmv_rewind_save(size_t, bool);
void zmv_rewind_load(size_t, bool);
void ClearCacheCheck()
{
memset(vidmemch2, 1, sizeof(vidmemch2));
memset(vidmemch4, 1, sizeof(vidmemch4));
memset(vidmemch8, 1, sizeof(vidmemch8));
}
// Code to handle special frames for pausing, and desync checking
uint8_t *SpecialPauseBackup = 0, PauseFrameMode = 0;
/*
Pause frame modes
0 - no pause frame stored
1 - pause frame ready to be stored
2 - pause frame stored
3 - pause frame ready for reload
*/
void BackupPauseFrame()
{
if (SpecialPauseBackup) {
copy_state_data(SpecialPauseBackup, memcpyinc, csm_save_rewind);
PauseFrameMode = 2;
}
}
void RestorePauseFrame()
{
if (SpecialPauseBackup) {
copy_state_data(SpecialPauseBackup, memcpyrinc, csm_load_rewind);
// ClearCacheCheck();
PauseFrameMode = 0;
}
}
void DeallocPauseFrame()
{
if (SpecialPauseBackup) {
free(SpecialPauseBackup);
}
}
#define ActualRewindFrames (uint32_t)(RewindFrames * (romispal ? 10 : 12))
void BackupCVFrame()
{
uint8_t* RewindBufferPos = StateBackup + LatestRewindPos * rewind_state_size;
if (MovieProcessing == MOVIE_PLAYBACK) {
zmv_rewind_save(LatestRewindPos, true);
} else if (MovieProcessing == MOVIE_RECORD) {
zmv_rewind_save(LatestRewindPos, false);
}
copy_state_data(RewindBufferPos, memcpyinc, csm_save_rewind);
if (RewindPosPassed) {
EarliestRewindPos = (EarliestRewindPos + 1) % AllocatedRewindStates;
RewindPosPassed = false;
}
// printf("Backing up in #%u, earliest: #%u, allocated: %u\n", LatestRewindPos, EarliestRewindPos, AllocatedRewindStates);
LatestRewindPos = (LatestRewindPos + 1) % AllocatedRewindStates;
if (LatestRewindPos == EarliestRewindPos) {
RewindPosPassed = true;
}
RewindTimer = ActualRewindFrames;
DblRewTimer += (DblRewTimer) ? 0 : ActualRewindFrames;
// printf("New backup slot: #%u, timer %u, check %u\n", LatestRewindPos, RewindTimer, DblRewTimer);
}
void RestoreCVFrame()
{
uint8_t* RewindBufferPos;
if (LatestRewindPos != ((EarliestRewindPos + 1) % AllocatedRewindStates)) {
if (DblRewTimer > ActualRewindFrames) {
if (LatestRewindPos == 1 || AllocatedRewindStates == 1) {
LatestRewindPos = AllocatedRewindStates - 1;
} else {
LatestRewindPos = (LatestRewindPos) ? LatestRewindPos - 2 : AllocatedRewindStates - 2;
}
} else {
LatestRewindPos = (LatestRewindPos) ? LatestRewindPos - 1 : AllocatedRewindStates - 1;
}
} else {
LatestRewindPos = EarliestRewindPos;
}
RewindBufferPos = StateBackup + LatestRewindPos * rewind_state_size;
// printf("Restoring from #%u, earliest: #%u\n", LatestRewindPos, EarliestRewindPos);
if (MovieProcessing == MOVIE_RECORD) {
zmv_rewind_load(LatestRewindPos, false);
} else {
if (MovieProcessing == MOVIE_PLAYBACK) {
zmv_rewind_load(LatestRewindPos, true);
}
if (PauseRewind || EMUPause) {
PauseFrameMode = EMUPause = true;
}
}
copy_state_data(RewindBufferPos, memcpyrinc, csm_load_rewind);
ClearCacheCheck();
LatestRewindPos = (LatestRewindPos + 1) % AllocatedRewindStates;
RewindTimer = ActualRewindFrames;
DblRewTimer = 2 * ActualRewindFrames;
}
void SetupRewindBuffer()
{
// For special rewind case to help out pauses
DeallocPauseFrame();
SpecialPauseBackup = malloc(rewind_state_size);
// For standard rewinds
if (StateBackup) {
free(StateBackup);
}
for (; RewindStates; RewindStates--) {
StateBackup = 0;
StateBackup = (uint8_t*)malloc(rewind_state_size * RewindStates);
if (StateBackup) {
break;
}
}
AllocatedRewindStates = RewindStates;
}
void DeallocRewindBuffer()
{
if (StateBackup) {
free(StateBackup);
}
}
static size_t state_size;
static void state_size_tally(uint8_t** dest, void* src, size_t len)
{
state_size += len;
}
void InitRewindVars()
{
uint8_t almost_useless_array[1]; // An array is needed for copy_state_data to give the correct size
state_size = 0;
copy_state_data(almost_useless_array, state_size_tally, csm_save_rewind);
rewind_state_size = state_size;
SetupRewindBuffer();
LatestRewindPos = 0;
EarliestRewindPos = 0;
RewindPosPassed = false;
RewindTimer = 1;
DblRewTimer = 1;
}
void InitRewindVarsForMovie()
{
LatestRewindPos = 0;
EarliestRewindPos = 0;
RewindPosPassed = false;
RewindTimer = 1;
DblRewTimer = 1;
}
// This is used to preserve system load state between game loads
static uint8_t* BackupSystemBuffer = 0;
void BackupSystemVars(void)
{
uint8_t* buffer;
if (!BackupSystemBuffer) {
state_size = 0;
copy_snes_data(&buffer, state_size_tally);
copy_spc_data(&buffer, state_size_tally);
copy_extra_data(&buffer, state_size_tally);
BackupSystemBuffer = (uint8_t*)malloc(state_size);
}
if (BackupSystemBuffer) {
buffer = BackupSystemBuffer;
copy_snes_data(&buffer, memcpyinc);
copy_spc_data(&buffer, memcpyinc);
copy_extra_data(&buffer, memcpyinc);
}
}
void RestoreSystemVars(void)
{
if (BackupSystemBuffer) {
uint8_t* buffer = BackupSystemBuffer;
InitRewindVars();
copy_snes_data(&buffer, memcpyrinc);
copy_spc_data(&buffer, memcpyrinc);
copy_extra_data(&buffer, memcpyrinc);
}
}
void DeallocSystemVars()
{
if (BackupSystemBuffer) {
free(BackupSystemBuffer);
}
}
extern uintptr_t Voice0BufPtr, Voice1BufPtr, Voice2BufPtr, Voice3BufPtr;
extern uintptr_t Voice4BufPtr, Voice5BufPtr, Voice6BufPtr, Voice7BufPtr;
void PrepareSaveState()
{
spcPCRam -= (uintptr_t)SPCRAM;
spcRamDP -= (uintptr_t)SPCRAM;
Voice0BufPtr -= (uintptr_t)spcBuffera;
Voice1BufPtr -= (uintptr_t)spcBuffera;
Voice2BufPtr -= (uintptr_t)spcBuffera;
Voice3BufPtr -= (uintptr_t)spcBuffera;
Voice4BufPtr -= (uintptr_t)spcBuffera;
Voice5BufPtr -= (uintptr_t)spcBuffera;
Voice6BufPtr -= (uintptr_t)spcBuffera;
Voice7BufPtr -= (uintptr_t)spcBuffera;
}
extern uintptr_t SA1Stat;
extern uint8_t IRAM[2049], *SA1Ptr, *SA1RegPCS, *CurBWPtr, *SA1BWPtr, *SNSBWPtr;
void SaveSA1()
{
SA1Stat &= 0xFFFFFF00;
SA1Ptr -= (uintptr_t)SA1RegPCS;
if (SA1RegPCS == IRAM) {
SA1Stat = (SA1Stat & 0xFFFFFF00) + 1;
}
if (SA1RegPCS == IRAM - 0x3000) {
SA1Stat = (SA1Stat & 0xFFFFFF00) + 2;
}
SA1RegPCS -= (uintptr_t)romdata;
CurBWPtr -= (uintptr_t)romdata;
SA1BWPtr -= (uintptr_t)romdata;
SNSBWPtr -= (uintptr_t)romdata;
}
void RestoreSA1()
{
SA1RegPCS += (uintptr_t)romdata;
CurBWPtr += (uintptr_t)romdata;
SA1BWPtr += (uintptr_t)romdata;
SNSBWPtr += (uintptr_t)romdata;
if ((SA1Stat & 0xFF) == 1) {
SA1RegPCS = IRAM;
}
if ((SA1Stat & 0xFF) == 2) {
SA1RegPCS = IRAM - 0x3000;
}
SA1Ptr += (uintptr_t)SA1RegPCS;
}
#define ResState(Voice_BufPtr) \
Voice_BufPtr += (uintptr_t)spcBuffera; \
if (Voice_BufPtr >= (uintptr_t)spcBuffera + 65536 * 4) { \
Voice_BufPtr = (uintptr_t)spcBuffera; \
}
void ResetState()
{
spcPCRam += (uintptr_t)SPCRAM;
spcRamDP += (uintptr_t)SPCRAM;
ResState(Voice0BufPtr);
ResState(Voice1BufPtr);
ResState(Voice2BufPtr);
ResState(Voice3BufPtr);
ResState(Voice4BufPtr);
ResState(Voice5BufPtr);
ResState(Voice6BufPtr);
ResState(Voice7BufPtr);
}
extern uint32_t SfxRomBuffer, SfxCROM;
extern uint32_t SfxLastRamAdr, SfxRAMMem;
static FILE* fhandle;
void CapturePicture();
static void write_save_state_data(uint8_t** dest, void* data, size_t len)
{
fwrite(data, 1, len, fhandle);
}
static const char zst_header_old[] = "ZSNES Save State File V0.6\x1a\x3c";
static const char zst_header_cur[] = "ZSNES Save State File V143\x1a\x8f";
void calculate_state_sizes()
{
state_size = 0;
copy_state_data(0, state_size_tally, csm_save_zst_new);
cur_zst_size = state_size + sizeof(zst_header_cur) - 1;
state_size = 0;
copy_state_data(0, state_size_tally, csm_load_zst_old);
old_zst_size = state_size + sizeof(zst_header_old) - 1;
}
uint32_t current_zst = 0;
uint32_t newest_zst = 0;
time_t newestfiledate;
char* zst_name()
{
static char buffer[7];
if ((MovieProcessing == MOVIE_PLAYBACK) || (MovieProcessing == MOVIE_RECORD)) {
sprintf(buffer, "%.2d.zst", (unsigned int)current_zst);
return (buffer);
}
strcpy(buffer, "zst");
if (current_zst) {
buffer[2] = (current_zst % 10) + '0';
if (current_zst > 9) {
buffer[1] = (current_zst / 10) + '0';
}
}
setextension(ZStateName, buffer);
return (ZStateName);
}
void zst_determine_newest(void)
{
struct stat filestat;
char* zst_path;
if (MovieInProgress()) {
mzt_chdir_up();
zst_path = ZMoviePath;
} else {
zst_path = ZSStatePath;
}
if (!stat_dir(zst_path, zst_name(), &filestat) && filestat.st_mtime > newestfiledate) {
newestfiledate = filestat.st_mtime;
newest_zst = current_zst;
}
if (MovieInProgress()) {
mzt_chdir_down();
}
}
void zst_init()
{
newestfiledate = 0;
if (LatestSave) {
for (current_zst = 0; current_zst < 100; current_zst++) {
zst_determine_newest();
}
current_zst = newest_zst;
zst_name();
}
}
int zst_exists(void)
{
int ret;
char* zst_path;
if (MovieInProgress()) {
mzt_chdir_up();
zst_path = ZMoviePath;
} else {
zst_path = ZSStatePath;
}
ret = access_dir(zst_path, zst_name(), F_OK) ? 0 : 1;
if (MovieInProgress()) {
mzt_chdir_down();
}
return (ret);
}
static bool zst_save_compressed(FILE* fp)
{
size_t data_size = cur_zst_size - (sizeof(zst_header_cur) - 1);
uint8_t* buffer = 0;
bool worked = false;
if ((buffer = (uint8_t*)malloc(data_size))) {
unsigned long compressed_size = compressBound(data_size);
uint8_t* compressed_buffer = 0;
if ((compressed_buffer = (uint8_t*)malloc(compressed_size))) {
copy_state_data(buffer, memcpyinc, csm_save_zst_new);
if (compress2(compressed_buffer, &compressed_size, buffer, data_size, Z_BEST_COMPRESSION) == Z_OK) {
fwrite3(compressed_size, fp);
fwrite(compressed_buffer, 1, compressed_size, fp);
worked = true;
}
free(compressed_buffer);
}
free(buffer);
}
if (!worked) // Compression failed for whatever reason
{
fwrite3(cur_zst_size | 0x00800000, fp); // Uncompressed ZST will never break 8MB
}
return (worked);
}
void zst_save(FILE* fp, bool Thumbnail, bool Compress)
{
PrepareOffset();
PrepareSaveState();
unpackfunct();
if (SFXEnable) {
SfxRomBuffer -= SfxCROM;
SfxLastRamAdr -= SfxRAMMem;
}
if (SA1Enable) {
SaveSA1(); // Convert SA-1 stuff to standard, non displacement format
}
if (!Compress || !zst_save_compressed(fp)) // If we don't want compressed or compression failed
{
fwrite(zst_header_cur, 1, sizeof(zst_header_cur) - 1, fp); //-1 for null
fhandle = fp; // Set global file handle
copy_state_data(0, write_save_state_data, csm_save_zst_new);
if (Thumbnail) {
CapturePicture();
fwrite(PrevPicture, 1, sizeof(PrevPicture), fp);
}
}
if (SFXEnable) {
SfxRomBuffer += SfxCROM;
SfxLastRamAdr += SfxRAMMem;
}
if (SA1Enable) {
RestoreSA1(); // Convert back SA-1 stuff
}
ResetOffset();
ResetState();
}
/*
Merges all the passed strings into buffer. Make sure to pass an extra parameter as 0 after all the strings.
Copies at most buffer_len characters. Result is always null terminated.
Returns how many bytes are needed to store all strings.
Thus if return is <= buffer_len, everything was copied.
*/
static size_t string_merge(char* buffer, size_t buffer_len, ...)
{
char* s;
size_t copied = 0, needed = 0;
va_list ap;
va_start(ap, buffer_len);
if (buffer && buffer_len) {
*buffer = 0;
}
while ((s = va_arg(ap, char*))) {
needed += strlen(s);
if (buffer && (copied + 1 < buffer_len)) {
strncpy(buffer + copied, s, buffer_len - copied);
buffer[buffer_len - 1] = 0;
copied += strlen(buffer + copied);
}
}
va_end(ap);
return (needed + 1);
}
static char txtmsg[30];
void set_state_message(char* prefix, char* suffix)
{
char num[3];
sprintf(num, "%d", (unsigned int)current_zst);
string_merge(txtmsg, sizeof(txtmsg), prefix, isextension(ZStateName, "zss") ? "AUTO" : num, suffix, 0);
Msgptr = txtmsg;
MessageOn = MsgCount;
}
void statesaver(void)
{
if (MovieProcessing == MOVIE_RECORD) {
//'Auto increment savestate slot' code
current_zst += AutoIncSaveSlot;
current_zst %= 100;
if (mzt_save(current_zst, !!cbitmode, false)) {
set_state_message("RR STATE ", " SAVED.");
} else {
current_zst += 100 - AutoIncSaveSlot;
current_zst %= 100;
}
return;
}
if ((MovieProcessing == MOVIE_PLAYBACK) || (MovieProcessing == MOVIE_DUMPING_NEW)) {
//'Auto increment savestate slot' code
current_zst += AutoIncSaveSlot;
current_zst %= 100;
if (mzt_save(current_zst, !!cbitmode, true)) {
set_state_message("RR STATE ", " SAVED.");
} else {
current_zst += 100 - AutoIncSaveSlot;
current_zst %= 100;
}
return;
}
clim();
//'Auto increment savestate slot' code
if (!isextension(ZStateName, "zss")) {
current_zst += (char)AutoIncSaveSlot;
current_zst %= 100;
zst_name();
}
if ((fhandle = fopen_dir(ZSStatePath, ZStateName, "wb"))) {
zst_save(fhandle, !!cbitmode, false);
fclose(fhandle);
// Display message onscreen, 'STATE XX SAVED.'
set_state_message("STATE ", " SAVED.");
} else {
// Display message onscreen, 'UNABLE TO SAVE.'
Msgptr = "UNABLE TO SAVE.";
MessageOn = MsgCount;
if (!isextension(ZStateName, "zss")) {
current_zst += 100 - (char)AutoIncSaveSlot;
current_zst %= 100;
zst_name();
}
}
stim();
}
extern uint32_t SfxMemTable[256], SfxCPB;
extern uint32_t SfxPBR, SfxROMBR, SfxRAMBR, SCBRrel, SfxSCBR;
extern uint8_t ioportval;
extern u1 nexthdma;
static void read_save_state_data(uint8_t** dest, void* data, size_t len)
{
load_save_size += fread(data, 1, len, fhandle);
}
static bool zst_load_compressed(FILE* fp, size_t compressed_size)
{
unsigned long data_size = cur_zst_size - (sizeof(zst_header_cur) - 1);
uint8_t* buffer = 0;
bool worked = false;
if ((buffer = (uint8_t*)malloc(data_size))) {
uint8_t* compressed_buffer = 0;
if ((compressed_buffer = (uint8_t*)malloc(compressed_size))) {
fread(compressed_buffer, 1, compressed_size, fp);
if (uncompress(buffer, &data_size, compressed_buffer, compressed_size) == Z_OK) {
copy_state_data(buffer, memcpyrinc, csm_load_zst_new);
worked = true;
}
free(compressed_buffer);
}
free(buffer);
}
return (worked);
}
bool zst_load(FILE* fp, size_t Compressed)
{
size_t zst_version = 0;
if (Compressed) {
if (!zst_load_compressed(fp, Compressed)) {
return (false);
}
} else {
char zst_header_check[sizeof(zst_header_cur) - 1];
Totalbyteloaded += fread(zst_header_check, 1, sizeof(zst_header_check), fp);
if (!memcmp(zst_header_check, zst_header_cur, sizeof(zst_header_check) - 2)) {
zst_version = 143; // v1.43+
}
if (!memcmp(zst_header_check, zst_header_old, sizeof(zst_header_check) - 2)) {
zst_version = 60; // v0.60 - v1.42
}
if (!zst_version) {
return (false);
} // Pre v0.60 saves are no longer loaded
load_save_size = 0;
fhandle = fp; // Set global file handle
copy_state_data(0, read_save_state_data, (zst_version == 143) ? csm_load_zst_new : csm_load_zst_old);
Totalbyteloaded += load_save_size;
}
if (SFXEnable) {
SfxCPB = SfxMemTable[(SfxPBR & 0xFF)];
SfxCROM = SfxMemTable[(SfxROMBR & 0xFF)];
SfxRAMMem = (uintptr_t)sfxramdata + ((SfxRAMBR & 0xFF) << 16);
SfxRomBuffer += SfxCROM;
SfxLastRamAdr += SfxRAMMem;
SCBRrel = (SfxSCBR << 10) + (uintptr_t)sfxramdata;
}
if (SA1Enable) {
RestoreSA1(); // Convert back SA-1 stuff
SA1UpdateDPageC();
}
if (SDD1Enable) {
UpdateBanksSDD1();
}
// Clear cache check if state loaded
ClearCacheCheck();
if (zst_version < 143) // Set new vars which old states did not have
{
prevoamptr = 0xFF;
ioportval = 0xFF;
spcnumread = 0;
}
if (MovieProcessing != MOVIE_RECORD) {
nexthdma = 0;
}
repackfunct();
initpitch();
ResetOffset();
ResetState();