bool UDemoNetDriver::InitConnect( FNetworkNotify* InNotify, const FURL& ConnectURL, FString& Error )
{
if ( GetWorld() == nullptr )
{
UE_LOG( LogDemo, Error, TEXT( "GetWorld() == nullptr" ) );
return false;
}
if ( GetWorld()->GetGameInstance() == nullptr )
{
UE_LOG( LogDemo, Error, TEXT( "GetWorld()->GetGameInstance() == nullptr" ) );
return false;
}
UGameInstance* GameInstance = GetWorld()->GetGameInstance();
// handle default initialization
if ( !InitBase( true, InNotify, ConnectURL, false, Error ) )
{
GameInstance->HandleDemoPlaybackFailure( EDemoPlayFailure::Generic, FString( TEXT( "InitBase FAILED" ) ) );
return false;
}
ResetDemoState();
// open the pre-recorded demo file
FileAr = IFileManager::Get().CreateFileReader( *DemoFilename );
if ( !FileAr )
{
Error = FString::Printf( TEXT( "Couldn't open demo file %s for reading" ), *DemoFilename );
UE_LOG( LogDemo, Error, TEXT( "UDemoNetDriver::InitConnect: %s" ), *Error );
GameInstance->HandleDemoPlaybackFailure( EDemoPlayFailure::DemoNotFound, FString( EDemoPlayFailure::ToString( EDemoPlayFailure::DemoNotFound ) ) );
return false;
}
// Playback, local machine is a client, and the demo stream acts "as if" it's the server.
ServerConnection = ConstructObject<UNetConnection>( UDemoNetConnection::StaticClass() );
ServerConnection->InitConnection( this, USOCK_Pending, ConnectURL, 1000000 );
// use the same byte format regardless of platform so that the demos are cross platform
// DEMO_FIXME: This is messing up for some reason, investigate
//FileAr->SetByteSwapping( true );
FNetworkDemoHeader DemoHeader;
(*FileAr) << DemoHeader;
// Check magic value
if ( DemoHeader.Magic != NETWORK_DEMO_MAGIC )
{
Error = FString( TEXT( "Demo file is corrupt" ) );
UE_LOG( LogDemo, Error, TEXT( "UDemoNetDriver::InitConnect: %s" ), *Error );
GameInstance->HandleDemoPlaybackFailure( EDemoPlayFailure::Corrupt, Error );
return false;
}
// Check version
if ( DemoHeader.Version != NETWORK_DEMO_VERSION )
{
Error = FString( TEXT( "Demo file version is incorrect" ) );
UE_LOG( LogDemo, Error, TEXT( "UDemoNetDriver::InitConnect: %s" ), *Error );
GameInstance->HandleDemoPlaybackFailure( EDemoPlayFailure::InvalidVersion, Error );
return false;
}
// Create fake control channel
ServerConnection->CreateChannel( CHTYPE_Control, 1 );
DemoTotalFrames = DemoHeader.NumFrames;
DemoTotalTime = DemoHeader.TotalTime;
UE_LOG( LogDemo, Log, TEXT( "Starting demo playback with demo. Filename: %s, Frames: %i, Version %i" ), *DemoFilename, DemoTotalFrames, DemoHeader.Version );
// Bypass UDemoPendingNetLevel
FString LoadMapError;
FURL DemoURL;
DemoURL.Map = DemoHeader.LevelName;
FWorldContext * WorldContext = GEngine->GetWorldContextFromWorld( GetWorld() );
if ( WorldContext == NULL )
{
Error = FString::Printf( TEXT( "No world context" ), *DemoFilename );
UE_LOG( LogDemo, Error, TEXT( "UDemoNetDriver::InitConnect: %s" ), *Error );
GameInstance->HandleDemoPlaybackFailure( EDemoPlayFailure::Generic, FString( TEXT( "No world context" ) ) );
return false;
}
GetWorld()->DemoNetDriver = NULL;
SetWorld( NULL );
auto NewPendingNetGame = NewObject<UDemoPendingNetGame>();
NewPendingNetGame->DemoNetDriver = this;
WorldContext->PendingNetGame = NewPendingNetGame;
if ( !GEngine->LoadMap( *WorldContext, DemoURL, NewPendingNetGame, LoadMapError ) )
{
Error = LoadMapError;
UE_LOG( LogDemo, Error, TEXT( "UDemoNetDriver::InitConnect: LoadMap failed: failed: %s" ), *Error );
GameInstance->HandleDemoPlaybackFailure( EDemoPlayFailure::Generic, FString( TEXT( "LoadMap failed" ) ) );
return false;
}
SetWorld( WorldContext->World() );
WorldContext->World()->DemoNetDriver = this;
WorldContext->PendingNetGame = NULL;
// Remember where we are
const int32 OldPos = FileAr->Tell();
// Jump to meta data
FileAr->Seek( DemoHeader.MetaDataOffset );
// Read meta data
for ( int32 i = 0; i < DemoHeader.NumStreamingLevels; ++i )
{
ULevelStreamingKismet* StreamingLevel = static_cast<ULevelStreamingKismet*>(StaticConstructObject(ULevelStreamingKismet::StaticClass(), GetWorld(), NAME_None, RF_NoFlags, NULL ) );
StreamingLevel->bShouldBeLoaded = true;
StreamingLevel->bShouldBeVisible = true;
StreamingLevel->bShouldBlockOnLoad = false;
StreamingLevel->bInitiallyLoaded = true;
StreamingLevel->bInitiallyVisible = true;
FString PackageName;
FString PackageNameToLoad;
(*FileAr) << PackageName;
(*FileAr) << PackageNameToLoad;
(*FileAr) << StreamingLevel->LevelTransform;
StreamingLevel->PackageNameToLoad = FName( *PackageNameToLoad );
StreamingLevel->SetWorldAssetByPackageName( FName( *PackageName ) );
GetWorld()->StreamingLevels.Add( StreamingLevel );
UE_LOG( LogDemo, Log, TEXT( " Loading streamingLevel: %s, %s" ), *PackageName, *PackageNameToLoad );
}
// Jump back to start of stream
FileAr->Seek( OldPos );
// Remember where the meta data is, this is where we must stop reading the demo stream
EndOfStreamOffset = DemoHeader.MetaDataOffset;
return true;
}
bool UDemoNetDriver::InitConnect( FNetworkNotify* InNotify, const FURL& ConnectURL, FString& Error )
{
// handle default initialization
if ( !InitBase( true, InNotify, ConnectURL, false, Error ) )
{
return false;
}
// open the pre-recorded demo file
FileAr = IFileManager::Get().CreateFileReader( *DemoFilename );
if ( !FileAr )
{
Error = FString::Printf( TEXT( "Couldn't open demo file %s for reading" ), *DemoFilename );
UE_LOG( LogDemo, Error, TEXT( "UDemoNetDriver::InitConnect: %s" ), *Error );
return false;
}
// Playback, local machine is a client, and the demo stream acts "as if" it's the server.
ServerConnection = ConstructObject<UNetConnection>( UDemoNetConnection::StaticClass() );
ServerConnection->InitConnection( this, USOCK_Pending, ConnectURL, 1000000 );
#if 1
// Create fake control channel
ServerConnection->CreateChannel( CHTYPE_Control, 1 );
#endif
// use the same byte format regardless of platform so that the demos are cross platform
// DEMO_FIXME: This is messing up for some reason, investigate
//FileAr->SetByteSwapping( true );
int32 EngineVersion = 0;
(*FileAr) << EngineVersion;
(*FileAr) << PlaybackTotalFrames;
UE_LOG( LogDemo, Log, TEXT( "Starting demo playback with demo. Filename: %s, Frames: %i, Version %i" ), *DemoFilename, PlaybackTotalFrames, EngineVersion );
#if 1
// Bypass UDemoPendingNetLevel
FString LevelName;
(*FileAr) << LevelName;
FString LoadMapError;
FURL DemoURL;
DemoURL.Map = LevelName;
FWorldContext * WorldContext = GEngine->GetWorldContextFromWorld( World );
if ( WorldContext == NULL )
{
Error = FString::Printf( TEXT( "No world context" ), *DemoFilename );
UE_LOG( LogDemo, Error, TEXT( "UDemoNetDriver::InitConnect: %s" ), *Error );
return false;
}
World->DemoNetDriver = NULL;
SetWorld( NULL );
UDemoPendingNetGame * NewPendingNetGame = new UDemoPendingNetGame( FPostConstructInitializeProperties() );
NewPendingNetGame->DemoNetDriver = this;
WorldContext->PendingNetGame = NewPendingNetGame;
if ( !GEngine->LoadMap( *WorldContext, DemoURL, NewPendingNetGame, LoadMapError ) )
{
Error = LoadMapError;
UE_LOG( LogDemo, Error, TEXT( "UDemoNetDriver::InitConnect: LoadMap failed: failed: %s" ), *Error );
return false;
}
SetWorld( WorldContext->World() );
WorldContext->World()->DemoNetDriver = this;
WorldContext->PendingNetGame = NULL;
#endif
int32 NumStreamingLevels = 0;
(*FileAr) << NumStreamingLevels;
for ( int32 i = 0; i < NumStreamingLevels; ++i )
{
ULevelStreamingKismet* StreamingLevel = static_cast<ULevelStreamingKismet*>(StaticConstructObject(ULevelStreamingKismet::StaticClass(), GetWorld(), NAME_None, RF_NoFlags, NULL ) );
StreamingLevel->bShouldBeLoaded = true;
StreamingLevel->bShouldBeVisible = true;
StreamingLevel->bShouldBlockOnLoad = false;
StreamingLevel->bInitiallyLoaded = true;
StreamingLevel->bInitiallyVisible = true;
FString PackageName;
FString PackageNameToLoad;
(*FileAr) << PackageName;
(*FileAr) << PackageNameToLoad;
(*FileAr) << StreamingLevel->LevelTransform;
StreamingLevel->PackageNameToLoad = FName( *PackageNameToLoad );
StreamingLevel->SetWorldAssetByPackageName( FName( *PackageName ) );
GetWorld()->StreamingLevels.Add( StreamingLevel );
UE_LOG( LogDemo, Log, TEXT( " Loading streamingLevel: %s, %s" ), *PackageName, *PackageNameToLoad );
}
DemoDeltaTime = 0;
return true;
}
