compress savestates, and movie no longer needs to do any compression itsself.

savestate compatibility is now broken.

src/movie.cpp

@@ -22,7 +22,6 @@
 #include "movie.h"
 #include "utils/memory.h"
 #include "utils/xstring.h"
-#include "zlib.h"
 
 
 #define MOVIE_MAGIC             0x1a4d4346      // FCM\x1a
@@ -438,22 +437,15 @@ void FCEUI_LoadMovie(char *fname, int _read_only, int _pauseframe)
 	//WE NEED TO LOAD A SAVESTATE
 	if(!currMovieData.poweronFlag)
 	{
-		//uncompress the savestate
+		//dump the savestate to disk
-		int bufsize = ntohl(*(int*)&currMovieData.savestate[0]);
-		uint8* buf = new uint8[bufsize];
-		uLongf uncomprlen = bufsize;
-		uncompress(buf,&uncomprlen,(uint8*)&currMovieData.savestate[4],currMovieData.savestate.size()-4);
-
-		//dump it to disk
 		FILE* fp = tmpfile();
-		fwrite(buf,1,bufsize,fp);
+		fwrite(&currMovieData.savestate[0],1,currMovieData.savestate.size(),fp);
 		fseek(fp,0,SEEK_SET);
 
 		//and load the state
 		bool success = FCEUSS_LoadFP(fp,SSLOADPARAM_BACKUP);
 
 		fclose(fp);
-		delete[] buf;
 
 		if(!success) return;
 	}
@@ -525,27 +517,14 @@ void FCEUI_SaveMovie(char *fname, uint8 flags, const char* metadata)
 		//dump a savestate to a tempfile..
 		FILE* tmp = tmpfile();
 		FCEUSS_SaveFP(tmp); 
+
+		//reloading the savestate into the data structure
 		fseek(tmp,0,SEEK_END);
 		int len = (int)ftell(tmp);
 		fseek(tmp,0,SEEK_SET);
-		//reloading the savestate from the tempfile..
+		currMovieData.savestate.resize(len);
-		uint8* buf = new uint8[len];
+		fread(&currMovieData.savestate[0],1,len,tmp);
-		fread(buf,1,len,tmp);
 		fclose(tmp);
-
-		//compress it
-		uint8* cbuf = new uint8[len*2]; //worst case compression, lets say twice the input buffer size
-		uLongf destlen;
-		int error = compress2(cbuf,&destlen,buf,len,Z_BEST_COMPRESSION);
-
-		//poke it in the data structure
-		currMovieData.savestate.resize(destlen+4);
-		memcpy(&currMovieData.savestate[4],cbuf,destlen);
-		*(int*)&currMovieData.savestate[0] = htonl(len);
-
-		//cleanup
-		delete[] buf;
-		delete[] cbuf;
 	}
 
 	//we are going to go ahead and dump the header. from now on we will only be appending frames

src/state.cpp

@@ -27,6 +27,8 @@
 #include <string.h>
 //#include <unistd.h> //mbg merge 7/17/06 removed
 
+#include <vector>
+
 #include "types.h"
 #include "x6502.h"
 #include "fceu.h"
@@ -41,6 +43,7 @@
 #include "netplay.h"
 #include "video.h"
 #include "input.h"
+#include "zlib.h"
 
 static void (*SPreSave)(void);
 static void (*SPostSave)(void);
@@ -305,56 +308,73 @@ static int ReadStateChunks(FILE *st, int32 totalsize)
  return ret;
 }
 
-
 int CurrentState=1;
 extern int geniestage;
 
-int FCEUSS_SaveFP(FILE *st)
+bool FCEUSS_SaveFP(FILE *st)
 {
-        static uint32 totalsize;
+	FILE* tmp = tmpfile();
-        static uint8 header[16]="FCS";
+
-        uint32 writeoffset;
+	uint32 totalsize = 0;
-        
+
-        writeoffset = ftell(st);
+	FCEUPPU_SaveState();
-        memset(header+4,0,13);
+	FCEUSND_SaveState();
-        header[3]=0xFF;
+	totalsize=WriteStateChunk(tmp,1,SFCPU);
-	FCEU_en32lsb(header + 8, FCEU_VERSION_NUMERIC);
+	totalsize+=WriteStateChunk(tmp,2,SFCPUC);
-        fwrite(header,1,16,st);       
+	totalsize+=WriteStateChunk(tmp,3,FCEUPPU_STATEINFO);
-        FCEUPPU_SaveState();
+	totalsize+=WriteStateChunk(tmp,4,FCEUCTRL_STATEINFO);
-        FCEUSND_SaveState();
+	totalsize+=WriteStateChunk(tmp,5,FCEUSND_STATEINFO);
-        totalsize=WriteStateChunk(st,1,SFCPU);
+	if(FCEUI_IsMovieActive())
-        totalsize+=WriteStateChunk(st,2,SFCPUC);
+	{
-        totalsize+=WriteStateChunk(st,3,FCEUPPU_STATEINFO);
+		totalsize+=WriteStateChunk(tmp,6,FCEUMOV_STATEINFO);
-        totalsize+=WriteStateChunk(st,4,FCEUCTRL_STATEINFO);
+		uint32 size = FCEUMOV_WriteState(0);
-        totalsize+=WriteStateChunk(st,5,FCEUSND_STATEINFO);
+		fputc(7,tmp);
-		if(FCEUI_IsMovieActive())
+		write32le(size, tmp);
-        {
+		FCEUMOV_WriteState(tmp);
-         totalsize+=WriteStateChunk(st,6,FCEUMOV_STATEINFO);
+		totalsize += 5 + size;
-         uint32 size = FCEUMOV_WriteState(0);
+	}
-         fputc(7,st);
+	// save back buffer
-         write32le(size, st);
+	{
-         FCEUMOV_WriteState(st);
+		extern uint8 *XBackBuf;
-         totalsize += 5 + size;
+		uint32 size = 256 * 256 + 8;
-        }
+		fputc(8,tmp);
-		// save back buffer
+		write32le(size, tmp);
-		{
+		fwrite(XBackBuf,1,size,tmp);
-			extern uint8 *XBackBuf;
+		totalsize += 5 + size;
-			uint32 size = 256 * 256 + 8;
+	}
-			fputc(8,st);
-			write32le(size, st);
-	        fwrite(XBackBuf,1,size,st);
-			totalsize += 5 + size;
-		}
 
 	if(SPreSave) SPreSave();
-        totalsize+=WriteStateChunk(st,0x10,SFMDATA);
+	totalsize+=WriteStateChunk(tmp,0x10,SFMDATA);
 	if(SPreSave) SPostSave();
 
-        fseek(st,writeoffset+4,SEEK_SET);
+	//save the length of the file
-        write32le(totalsize,st);
+	int len = (int)ftell(tmp);
-	return(1);
+
+	//reload the savestate from the tempfile 
+	fseek(tmp,0,SEEK_SET);
+	std::vector<uint8> buf(len);
+	fread(&buf[0],1,len,tmp);
+	fclose(tmp);
+
+	//compress it
+	uint8* cbuf = new uint8[len*2]; //worst case compression, lets say twice the input buffer size
+	uLongf comprlen;
+	int error = compress2(cbuf,&comprlen,&buf[0],len,Z_BEST_COMPRESSION);
+
+	//dump the header
+	uint8 header[16]="FCSX";
+	FCEU_en32lsb(header+4, totalsize);
+	FCEU_en32lsb(header+8, FCEU_VERSION_NUMERIC);
+	FCEU_en32lsb(header+12, comprlen);
+
+	//dump it to the destination file
+	fwrite(header,1,16,st);
+	fwrite(cbuf,1,comprlen,st);
+
+	return error == Z_OK;
 }
 
+
 void FCEUSS_Save(char *fname)
 {
 	FILE *st=NULL;
@@ -392,14 +412,38 @@ void FCEUSS_Save(char *fname)
 	}
 }
 
-int FCEUSS_LoadFP(FILE *st, ENUM_SSLOADPARAMS params)
+bool FCEUSS_LoadFP(FILE *st, ENUM_SSLOADPARAMS params)
 {
 	if(params==SSLOADPARAM_DUMMY && suppress_scan_chunks)
 		return 1;
 
-	int x;
+	////--------------
+	////read and decompress the savestate
+	//uint32 comprlen, datalen;
+	//if(!read32le(&datalen,st))
+	//	return false;
+	//if(!read32le(&comprlen,st))
+	//	return false;
+	//
+	//std::vector<uint8> cbuf(comprlen);
+	//std::vector<uint8> buf(datalen);
+	//if(fread(&cbuf[0],1,comprlen,st) != comprlen)
+	//	return false;
+
+	//uLongf uncomprlen = datalen;
+	//int error = uncompress(&buf[0],&uncomprlen,&cbuf[0],comprlen);
+	//if(error != Z_OK || uncomprlen != datalen)
+	//	return false;
+
+	////dump savestate to a tempfile
+	//FILE* tmp = tmpfile();
+	//fwrite(&buf[0],0,datalen,tmp);
+	//fseek(tmp,0,SEEK_SET);
+	////-----------------
+
+
+	bool x;
 	uint8 header[16];
-	int stateversion;
 	char* fn=0;
 
 	//Make temporary savestate in case something screws up during the load
@@ -425,36 +469,50 @@ int FCEUSS_LoadFP(FILE *st, ENUM_SSLOADPARAMS params)
 	}
 
 	if(params!=SSLOADPARAM_DUMMY)
-	{
 		FCEUMOV_PreLoad();
-	}
+	
+	//read and analyze the header
 	fread(&header,1,16,st);
-	if(memcmp(header,"FCS",3))
+	if(memcmp(header,"FCSX",4))
-	{
+		return false;
-		return(0);
+	int totalsize = FCEU_de32lsb(header + 4);
-	}
+	int stateversion = FCEU_de32lsb(header + 8);
-	if(header[3] == 0xFF)
+	int comprlen = FCEU_de32lsb(header + 12);
-	{
+
-		stateversion = FCEU_de32lsb(header + 8);
+	//load the compressed chunk and decompress
-	}
+	std::vector<uint8> cbuf(comprlen);
-	else
+	std::vector<uint8> buf(totalsize);
-	{
+	if(fread(&cbuf[0],1,comprlen,st) != comprlen)
-		stateversion=header[3] * 100;
+		return false;
-	}
+
+	uLongf uncomprlen = totalsize;
+	int error = uncompress(&buf[0],&uncomprlen,&cbuf[0],comprlen);
+	if(error != Z_OK || uncomprlen != totalsize)
+		return false;
+
+	//dump it back to a tempfile
+	FILE* tmp = tmpfile();
+	fwrite(&buf[0],1,totalsize,tmp);
+	fseek(tmp,0,SEEK_SET);
+
 	if(params == SSLOADPARAM_DUMMY)
 	{
 		scan_chunks=1;
 	}
-	x=ReadStateChunks(st,*(uint32*)(header+4));
+	
+	x = ReadStateChunks(tmp,totalsize)!=0;
+	
 	if(params == SSLOADPARAM_DUMMY)
 	{
 		scan_chunks=0;
-		return 1;
+		fclose(tmp);
-	}
+		return true;
-	if(read_sfcpuc && stateversion<9500)
-	{
-		X.IRQlow=0;
 	}
+
+	//mbg 5/24/08 - we don't support old states, so this shouldnt matter.
+	//if(read_sfcpuc && stateversion<9500)
+	//	X.IRQlow=0;
+
 	if(GameStateRestore)
 	{
 		GameStateRestore(stateversion);
@@ -463,7 +521,7 @@ int FCEUSS_LoadFP(FILE *st, ENUM_SSLOADPARAMS params)
 	{
 		FCEUPPU_LoadState(stateversion);
 		FCEUSND_LoadState(stateversion);  
-		x=FCEUMOV_PostLoad();
+		x=FCEUMOV_PostLoad()!=0;
 	}
 
 	if(fn)
@@ -483,7 +541,8 @@ int FCEUSS_LoadFP(FILE *st, ENUM_SSLOADPARAMS params)
 		free(fn);
 	}
 
-	return(x);
+	fclose(tmp);
+	return x;
 }
 
 int FCEUSS_Load(char *fname)

src/state.h

@@ -29,8 +29,8 @@ enum ENUM_SSLOADPARAMS
 
 void FCEUSS_Save(char *);
 int FCEUSS_Load(char *);
-int FCEUSS_SaveFP(FILE *);
+bool FCEUSS_SaveFP(FILE *);
-int FCEUSS_LoadFP(FILE *, ENUM_SSLOADPARAMS);
+bool FCEUSS_LoadFP(FILE *, ENUM_SSLOADPARAMS);
 
 extern int CurrentState;
 void FCEUSS_CheckStates(void);