Changes for TF2 demo compatibility

demboyz/demboyz.cpp

@@ -1,5 +1,6 @@
 
 #include "demofile.h"
+#include <assert.h>
 
 int main(const int argc, const char* argv[])
 {
@@ -14,6 +15,14 @@ int main(const int argc, const char* argv[])
         return -1;
     }
 
+    auto demoHeader = demoFile.GetDemoHeader();
+
+    unsigned char cmd;
+    int32 tick;
+    demoFile.ReadCmdHeader(cmd, tick);
+
+    assert(cmd == dem_synctick && tick == 0);
+
     demoFile.Close();
 
     return 0;

demboyz/demofile.cpp

@@ -27,7 +27,9 @@
 #include <assert.h>
 #include "demofile.h"
 
-CDemoFile::CDemoFile()
+CDemoFile::CDemoFile():
+    m_DemoHeader(),
+    m_fileBufferPos(0)
 {
 }
 
@@ -56,7 +58,7 @@ void CDemoFile::ReadCmdInfo( democmdinfo_t& info )
     m_fileBufferPos += sizeof( democmdinfo_t );
 }
 
-void CDemoFile::ReadCmdHeader( unsigned char& cmd, int32& tick, unsigned char& playerSlot )
+void CDemoFile::ReadCmdHeader( unsigned char& cmd, int32& tick )
 {
     if ( !m_fileBuffer.size() )
         return;
@@ -77,10 +79,6 @@ void CDemoFile::ReadCmdHeader( unsigned char& cmd, int32& tick, unsigned char& p
     // Read the timestamp
     tick = *( int32 * )( &m_fileBuffer[ m_fileBufferPos ] );
     m_fileBufferPos += sizeof( int32 );
-
-    // read playerslot
-    playerSlot = *( unsigned char * )( &m_fileBuffer[ m_fileBufferPos ] );
-    m_fileBufferPos += sizeof( unsigned char );
 }
 
 int32 CDemoFile::ReadUserCmd( char *buffer, int32 &size )
@@ -164,6 +162,14 @@ bool CDemoFile::Open( const char *name )
             return false;
         }
 
+        const int32 signOnLength = m_DemoHeader.signonlength;
+        if (signOnLength > 0)
+        {
+            m_signOnData.resize(signOnLength);
+            fread(&m_signOnData[0], 1, signOnLength, fp);
+            Length -= signOnLength;
+        }
+
         m_fileBuffer.resize( Length );
         fread( &m_fileBuffer[ 0 ], 1, Length, fp );
 
@@ -186,7 +192,8 @@ bool CDemoFile::Open( const char *name )
 void CDemoFile::Close()
 {
     m_szFileName.clear();
+    m_signOnData.clear();
+    m_fileBuffer.clear();
 
     m_fileBufferPos = 0;
-    m_fileBuffer.clear();
 }

demboyz/demofile.h

@@ -34,7 +34,7 @@
 #include <inttypes.h>
 
 #define DEMO_HEADER_ID      "HL2DEMO"
-#define DEMO_PROTOCOL       4
+#define DEMO_PROTOCOL       3
 
 #if !defined( MAX_OSPATH )
 #define MAX_OSPATH      260         // max length of a filesystem pathname
@@ -92,7 +92,7 @@ struct demoheader_t
 #define FDEMO_USE_ANGLES2   ( 1 << 1 )
 #define FDEMO_NOINTERP      ( 1 << 2 )  // don't interpolate between this an last view
 
-#define MAX_SPLITSCREEN_CLIENTS 2
+#define MAX_SPLITSCREEN_CLIENTS 1
 
 struct QAngle
 {
@@ -222,7 +222,7 @@ class CDemoFile
 {
 public:
     CDemoFile();
-    virtual ~CDemoFile();
+    ~CDemoFile();
 
     bool    Open( const char *name );
     void    Close();
@@ -233,19 +233,32 @@ public:
 
     void    ReadCmdInfo( democmdinfo_t& info );
 
-    void    ReadCmdHeader( unsigned char &cmd, int32 &tick, unsigned char& playerSlot );
+    void    ReadCmdHeader( unsigned char &cmd, int32 &tick );
     
     int32   ReadUserCmd( char *buffer, int32 &size );
 
-    demoheader_t *ReadDemoHeader();
+    const demoheader_t *GetDemoHeader() const;
 
-public:
+    const std::string& GetSignOnData() const;
+
+private:
     demoheader_t    m_DemoHeader;  //general demo info
 
     std::string m_szFileName;
+    std::string m_signOnData;
+    std::string m_fileBuffer;
 
     size_t m_fileBufferPos;
-    std::string m_fileBuffer;
 };
 
+inline const demoheader_t *CDemoFile::GetDemoHeader() const
+{
+    return &m_DemoHeader;
+}
+
+inline const std::string& CDemoFile::GetSignOnData() const
+{
+    return m_signOnData;
+}
+
 #endif // DEMOFILE_H