void EncodeClassName( char *name, char *identifier )
{
RakNet::BitStream bitStream;
int index = 0;
unsigned char byte;
while ( index < MAXIMUM_CLASS_IDENTIFIER_LENGTH - 1 )
{
if ( name[ index ] == 0 )
break;
// This should generate a unique identifier for any realistic class name that is 5/8th the length of the actual name and weakly encrypts and compresses it
if ( name[ index ] >= 'a' && name[ index ] <= 'z' )
byte = name[ index ] - 'a';
else if ( name[ index ] >= 'A' && name[ index ] <= 'Z' )
byte = name[ index ] - 'A';
else if ( name[ index ] >= '0' && name[ index ] <= '9' )
byte = name[ index ] - '0';
else
byte = name[ index ] << 3;
bitStream.WriteBits( ( unsigned char* ) & byte, 5 );
index++;
}
#ifdef _DEBUG
memset( identifier, 0, MAXIMUM_CLASS_IDENTIFIER_LENGTH );
#endif
identifier[ 0 ] = ( char ) ( bitStream.GetNumberOfBytesUsed() );
memcpy( identifier + 1, bitStream.GetData(), bitStream.GetNumberOfBytesUsed() );
}
void Server::initialSync(const RakNet::SystemAddress &sa,running_machine *machine)
{
unsigned char checksum = 0;
waitingForClientCatchup=true;
machine->osd().pauseAudio(true);
int syncBytes;
{
RakNet::BitStream uncompressedStream;
uncompressedStream.Write(startupTime);
uncompressedStream.Write(globalCurtime);
if(getSecondsBetweenSync())
{
while(memoryBlocksLocked)
{
;
}
memoryBlocksLocked=true;
cout << "IN CRITICAL SECTION\n";
cout << "SERVER: Sending initial snapshot\n";
int numBlocks = int(blocks.size());
cout << "NUMBLOCKS: " << numBlocks << endl;
uncompressedStream.Write(numBlocks);
// NOTE: The server must send stale data to the client for the first time
// So that future syncs will be accurate
for(int blockIndex=0; blockIndex<int(initialBlocks.size()); blockIndex++)
{
//cout << "BLOCK SIZE FOR INDEX " << blockIndex << ": " << staleBlocks[blockIndex].size << endl;
uncompressedStream.Write(initialBlocks[blockIndex].size);
cout << "BLOCK " << blockIndex << ": ";
for(int a=0; a<staleBlocks[blockIndex].size; a++)
{
checksum = checksum ^ staleBlocks[blockIndex].data[a];
//cout << int(staleBlocks[blockIndex].data[a]) << ' ';
unsigned char value = initialBlocks[blockIndex].data[a] ^ staleBlocks[blockIndex].data[a];
uncompressedStream.WriteBits(&value,8);
}
cout << int(checksum) << endl;
}
}
for(
map<int,vector< string > >::iterator it = peerInputs.begin();
it != peerInputs.end();
it++
)
{
uncompressedStream.Write(it->first);
uncompressedStream.Write(int(oldPeerInputs[it->first].size()) + int(it->second.size()));
for(int a=0; a<(int)it->second.size(); a++)
{
uncompressedStream.Write(int(it->second[a].length()));
uncompressedStream.WriteBits((const unsigned char*)it->second[a].c_str(),it->second[a].length()*8);
for(int b=0;b<it->second[a].length();b++)
{
checksum = checksum ^ it->second[a][b];
}
}
for(int a=0; a<int(oldPeerInputs[it->first].size()); a++)
{
uncompressedStream.Write(int(oldPeerInputs[it->first][a].length()));
uncompressedStream.WriteBits((const unsigned char*)oldPeerInputs[it->first][a].c_str(),oldPeerInputs[it->first][a].length()*8);
for(int b=0;b<oldPeerInputs[it->first][a].length();b++)
{
checksum = checksum ^ oldPeerInputs[it->first][a][b];
}
}
}
uncompressedStream.Write(int(-1));
uncompressedStream.Write(checksum);
cout << "CHECKSUM: " << int(checksum) << endl;
if(uncompressedBufferSize<uncompressedStream.GetNumberOfBytesUsed()+sizeof(int))
{
uncompressedBufferSize = uncompressedStream.GetNumberOfBytesUsed()+sizeof(int);
free(uncompressedBuffer);
uncompressedBuffer = (unsigned char*)malloc(uncompressedBufferSize);
if(!uncompressedBuffer)
{
cout << __FILE__ << ":" << __LINE__ << " OUT OF MEMORY\n";
exit(1);
}
}
syncBytes = uncompressedStream.GetNumberOfBytesUsed();
memcpy(uncompressedBuffer,uncompressedStream.GetData(),uncompressedStream.GetNumberOfBytesUsed());
int uncompressedStateSize = (int)uncompressedStream.GetNumberOfBytesUsed();
printf("INITIAL UNCOMPRESSED STATE SIZE: %d\n",uncompressedStateSize);
}
cout << "PUTTING NVRAM AT LOCATION " << syncBytes << endl;
// open the file; if it exists, call everyone to read from it
emu_file file(machine->options().nvram_directory(), OPEN_FLAG_READ);
if (file.open(machine->basename(), ".nv") == FILERR_NONE && file.size()<=1024*1024*64) //Don't bother sending huge NVRAM's
{
int nvramSize = file.size();
if(uncompressedBufferSize<syncBytes+sizeof(int)+nvramSize)
{
uncompressedBufferSize = syncBytes+sizeof(int)+nvramSize;
free(uncompressedBuffer);
uncompressedBuffer = (unsigned char*)malloc(uncompressedBufferSize);
if(!uncompressedBuffer)
{
cout << __FILE__ << ":" << __LINE__ << " OUT OF MEMORY\n";
exit(1);
}
}
cout << "SENDING NVRAM OF SIZE: " << nvramSize << endl;
memcpy(uncompressedBuffer+syncBytes,&nvramSize,sizeof(int));
file.read(uncompressedBuffer+syncBytes+sizeof(int),nvramSize);
file.close();
syncBytes += sizeof(int) + nvramSize;
}
else
{
int dummy=0;
memcpy(uncompressedBuffer+syncBytes,&dummy,sizeof(int));
syncBytes += sizeof(int);
}
cout << "BYTES USED: " << syncBytes << endl;
//The application should ensure that this value be at least (sourceLen 1.001) + 12.
//JJG: Doing more than that to account for header and provide some padding
//vector<unsigned char> compressedInitialSyncBuffer(
//sizeof(int)*2 + lzmaGetMaxCompressedSize(uncompressedStream.GetNumberOfBytesUsed()), '\0');
//JJG: Take a risk and assume the compressed size will be smaller than the uncompressed size
int newCompressedSize = max(1024*1024,int(sizeof(int)*2 + lzmaGetMaxCompressedSize(syncBytes)));
if(compressedBufferSize < newCompressedSize )
{
compressedBufferSize = newCompressedSize;
cout << "NEW COMPRESSED BUFFER SIZE: " << compressedBufferSize << endl;
free(compressedBuffer);
compressedBuffer = (unsigned char*)malloc(compressedBufferSize);
if(!compressedBuffer)
{
cout << __FILE__ << ":" << __LINE__ << " OUT OF MEMORY\n";
exit(1);
}
}
int compressedSizeLong = compressedBufferSize;
//FILE *stateptr = fopen("initialState.dat","wb");
//fwrite(uncompressedStream.GetData(),uncompressedStream.GetNumberOfBytesUsed(),1,stateptr);
//fclose(stateptr);
lzmaCompress(
compressedBuffer+sizeof(int)+sizeof(int),
compressedSizeLong,
uncompressedBuffer,
syncBytes,
6
);
int uncompressedSize = (int)syncBytes;
memcpy(compressedBuffer,&uncompressedSize,sizeof(int));
int compressedSize = (int)compressedSizeLong;
memcpy(compressedBuffer+sizeof(int),&compressedSize,sizeof(int));
printf("INITIAL UNCOMPRESSED SIZE: %d\n",uncompressedSize);
printf("INITIAL COMPRESSED SIZE: %d\n",compressedSize);
/*
rakInterface->Send(
(char*)(&compressedInitialSyncBuffer[0]),
compressedSize+1+sizeof(int),
HIGH_PRIORITY,
RELIABLE_ORDERED,
ORDERING_CHANNEL_SYNC,
guid,
false
);
*/
//
unsigned char *sendPtr = compressedBuffer;
int sizeRemaining = compressedSize+sizeof(int)+sizeof(int);
printf("INITIAL COMPRESSED SIZE: %dKB\n",sizeRemaining/1024);
int packetSize = max(256,min(1024,sizeRemaining/100));
oldInputTime.seconds = oldInputTime.attoseconds = 0;
while(sizeRemaining>packetSize)
{
RakNet::BitStream bitStreamPart(65536);
unsigned char header = ID_INITIAL_SYNC_PARTIAL;
bitStreamPart.WriteBits((const unsigned char*)&header,8*sizeof(unsigned char));
bitStreamPart.WriteBits((const unsigned char*)sendPtr,8*packetSize);
sizeRemaining -= packetSize;
sendPtr += packetSize;
rakInterface->Send(
&bitStreamPart,
HIGH_PRIORITY,
RELIABLE_ORDERED,
ORDERING_CHANNEL_SYNC,
sa,
false
);
ui_update_and_render(*machine, &machine->render().ui_container());
machine->osd().update(false);
RakSleep(10);
}
{
RakNet::BitStream bitStreamPart(65536);
unsigned char header = ID_INITIAL_SYNC_COMPLETE;
bitStreamPart.WriteBits((const unsigned char*)&header,8*sizeof(unsigned char));
bitStreamPart.WriteBits((const unsigned char*)sendPtr,8*sizeRemaining);
rakInterface->Send(
&bitStreamPart,
HIGH_PRIORITY,
RELIABLE_ORDERED,
ORDERING_CHANNEL_SYNC,
sa,
false
);
ui_update_and_render(*machine, &machine->render().ui_container());
machine->osd().update(false);
RakSleep(10);
}
//
cout << "FINISHED SENDING BLOCKS TO CLIENT\n";
cout << "SERVER: Done with initial snapshot\n";
cout << "OUT OF CRITICAL AREA\n";
cout.flush();
memoryBlocksLocked=false;
}