private void ReadHeader(BinaryReader br)
{
br.BaseStream.Seek(8, SeekOrigin.Begin); // skip magic, DemoFactory checks it
demoProtocol = br.ReadUInt32();
if (demoProtocol > 3)
{
throw new ApplicationException(String.Format("Unsupported demo protocol \"{0}\", should be 3.", demoProtocol));
}
networkProtocol = br.ReadUInt32();
if (networkProtocol > 18)
{
UnsupportedNetworkProtocol = true;
}
serverName = Common.ReadNullTerminatedString(br, 260);
recorderName = Common.ReadNullTerminatedString(br, 260);
mapName = Common.ReadNullTerminatedString(br, 260).ToLower();
gameFolderName = Common.ReadNullTerminatedString(br, 260).ToLower();
durationInSeconds = Math.Abs(br.ReadSingle());
if (recorderName == "SourceTV Demo")
{
perspective = Perspectives.SourceTv;
}
else
{
perspective = Perspectives.Pov;
}
Game = GameManager.Find(this);
}
public static Demo CreateDemo(String fileName)
{
const Int32 magicStringLength = 8;
using (FileStream inputStream = File.OpenRead(fileName))
{
using (BinaryReader binaryReader = new BinaryReader(inputStream))
{
String magic = Common.ReadNullTerminatedString(binaryReader, magicStringLength);
binaryReader.Close();
// create demo object
Demo demo = null;
if (magic == "HLDEMO")
{
demo = new HalfLifeDemo(fileName);
}
else if (magic == "HL2DEMO")
{
demo = new SourceDemo(fileName);
}
else
{
throw new ApplicationException("Not a valid Half-Life or Source engine demo file.");
}
return(demo);
}
}
}
private void ReadHeader(BinaryReader br)
{
br.BaseStream.Seek(8, SeekOrigin.Begin); // skip magic, DemoFactory checks it
demoProtocol = br.ReadUInt32();
if (demoProtocol > 3)
{
// the format of the rest of the header may have changed, but continue anyway since it's not critical information
UnsupportedDemoProtocol = true;
}
networkProtocol = br.ReadUInt32();
if (networkProtocol > 18)
{
UnsupportedNetworkProtocol = true;
}
serverName = Common.ReadNullTerminatedString(br, 260);
recorderName = Common.ReadNullTerminatedString(br, 260);
mapName = Common.ReadNullTerminatedString(br, 260).ToLower();
gameFolderName = Common.ReadNullTerminatedString(br, 260).ToLower();
durationInSeconds = Math.Abs(br.ReadSingle());
if (recorderName == "SourceTV Demo")
{
perspective = Perspectives.SourceTv;
}
else
{
perspective = Perspectives.Pov;
}
Game = GameManager.Find(this);
}
private void ReadHeader(BinaryReader br)
{
br.BaseStream.Seek(8, SeekOrigin.Current); // skip magic, DemoFactory checks it
demoProtocol = br.ReadUInt32();
if (demoProtocol != 5)
{
throw new ApplicationException(String.Format("Unknown demo protocol \"{0}\", should be 5.", demoProtocol));
}
networkProtocol = br.ReadUInt32();
if (networkProtocol < 43) // don't support demos older than HL 1.1.0.4/CS 1.0
{
throw new ApplicationException(String.Format("Unsupported network protcol \"{0}\", only 43 and higher are supported."));
}
mapName = Common.ReadNullTerminatedString(br, 260).ToLower();
gameFolderName = Common.ReadNullTerminatedString(br, 260).ToLower();
mapChecksum = br.ReadUInt32();
Int64 directoryEntriesOffset = br.ReadUInt32();
// check directory entries
// check offset, should be exactly file length - no. of dir entries (int) + dir entry size * 2
// otherwise, assume they are corrupt
if (directoryEntriesOffset != fileLengthInBytes - 4 - (DirectoryEntrySizeInBytes * 2))
{
status = StatusEnum.CorruptDirEntries;
return;
}
// seek to directory entries offset
Int64 newPosition = br.BaseStream.Seek(directoryEntriesOffset, SeekOrigin.Begin); // CHECK ME: is this correct or is an exception thrown if we seek to far?
if (newPosition != directoryEntriesOffset)
{
status = StatusEnum.CorruptDirEntries;
return;
}
// read no. of directory entries
Int32 nDirectoryEntries = br.ReadInt32();
if (nDirectoryEntries != 2)
{
status = StatusEnum.CorruptDirEntries;
return;
}
// read directory entries
for (Int32 i = 0; i < nDirectoryEntries; i++)
{
br.BaseStream.Seek(4, SeekOrigin.Current); // skip number
String dirEntryTitle = Common.ReadNullTerminatedString(br, 64);
br.BaseStream.Seek(8, SeekOrigin.Current); // skip flags, cdtrack
Single dirEntryTime = br.ReadSingle();
br.BaseStream.Seek(12, SeekOrigin.Current); // skip frames, offset and length (we calculate these ourselves, so corrupt directory entries or not, the demo is treated the same)
if (dirEntryTitle.ToLower() == "playback")
{
// store demo duration
durationInSeconds = Math.Abs(dirEntryTime);
}
}
}
private Byte[] ReadFrameData(HalfLifeDemoParser.FrameHeader frameHeader, out Boolean writeFrame)
{
Byte[] result = null;
writeFrame = true;
if (frameHeader.Type == 0 || frameHeader.Type == 1)
{
// frame header
Byte[] frameHeaderDemoInfo = parser.Reader.ReadBytes(parser.GameDataDemoInfoLength);
Byte[] frameHeaderSequenceInfo = parser.Reader.ReadBytes(parser.GameDataSequenceInfoLength);
UInt32 gameDataLength = parser.Reader.ReadUInt32();
// frame data
Byte[] frameData = null;
if (gameDataLength != 0)
{
// read frame data
frameData = parser.Reader.ReadBytes((Int32)gameDataLength);
if (frameData.Length != gameDataLength)
{
throw new ApplicationException("Gamedata frame length doesn't match header.");
}
// Give the writer interface a chance to insert any new messages into the first gamedata frame.
if (frameHeader.Type == 1 && !foundPlaybackOffset)
{
demoWriterInterface.ProcessFirstGameDataFrame(ref frameData);
}
// parse frame messages
try
{
if (demoWriterInterface.ShouldParseGameDataMessages(frameHeader.Type))
{
parser.ParseGameDataMessages(frameData, demoWriterInterface.GetNewUserMessageId);
// set frame data to version modified by parsing
frameData = parser.BitBuffer.Data;
}
}
catch (ThreadAbortException)
{
throw;
}
catch (Exception ex)
{
Error("Error parsing gamedata frame.\n\n" + parser.ComputeMessageLog(), ex, true);
if (lastErrorResult != MessageWindow.Result.Continue)
{
throw new AbortWritingException();
}
else
{
writeFrame = false;
return(null);
}
}
}
// check for end of loading segment
if (frameHeader.Type == 1)
{
if (!foundPlaybackOffset)
{
// last 5 frame (end of segment) will have stored the correct offset
foundPlaybackOffset = true;
}
// count playback segment gamedata frames
nPlaybackFrames++;
}
// copy contents of frame into memorystream, return result
MemoryStream ms = new MemoryStream();
demoWriterInterface.WriteDemoInfo(frameHeaderDemoInfo, ms);
ms.Write(frameHeaderSequenceInfo, 0, frameHeaderSequenceInfo.Length);
if (gameDataLength == 0)
{
ms.Write(BitConverter.GetBytes(gameDataLength), 0, 4);
}
else
{
ms.Write(BitConverter.GetBytes(frameData.Length), 0, 4);
ms.Write(frameData, 0, frameData.Length);
}
return(ms.ToArray());
}
else if (frameHeader.Type == 3) // client command
{
String command = Common.ReadNullTerminatedString(parser.Reader, 64);
if (!demoWriterInterface.ShouldWriteClientCommand(command))
{
// don't write frame
writeFrame = false;
return(null);
}
parser.Seek(-64);
result = parser.Reader.ReadBytes(64);
if (result.Length != 64)
{
throw new ApplicationException("Unexpected client command frame data length.");
}
}
else if (Config.Settings.PlaybackRemoveWeaponAnimations && frameHeader.Type == 7)
{
parser.Seek(8);
writeFrame = false;
return(null);
}
else if (frameHeader.Type != 5)
{
Int32 frameLength = parser.GetFrameLength(frameHeader.Type);
if (frameLength != 0)
{
result = parser.Reader.ReadBytes(frameLength);
if (result.Length != frameLength)
{
throw new ApplicationException("Unexpected frame data length.");
}
}
}
return(result);
}
