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engine/cl_demo.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#ifndef CL_DEMO_H
+#define CL_DEMO_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "demofile.h"
+#include "cl_demoactionmanager.h"
+
+struct DemoCommandQueue
+{
+	DemoCommandQueue()
+	{
+		tick = 0;
+	}
+	int				tick;
+	democmdinfo_t	info;
+	int				filepos;
+};
+
+// When skipping forward through a replay it is important to stop
+// occasionally and process the backlog of packets. Otherwise if you
+// skip forward too far you will cause data structures to grow far
+// beyond their intended size. This can lead to overflows and out-of-memory
+// errors, and it can waste memory because some of these data structures
+// never release their memory after hitting a high-water mark.
+const unsigned nMaxConsecutiveSkipPackets = 100;
+
+class CDemoPlayer : public IDemoPlayer
+{
+
+public: // IDemoPlayer interface implementation:
+	CDemoPlayer();
+	~CDemoPlayer();
+
+	virtual CDemoFile *GetDemoFile();
+
+	virtual bool	StartPlayback( const char *filename, bool bAsTimeDemo );
+	virtual void	PausePlayback( float seconds );
+	virtual void	SkipToTick( int tick, bool bRelative, bool bPause );
+	virtual void	SetEndTick( int tick );
+	virtual void	ResumePlayback( void );
+	virtual void	StopPlayback( void );
+
+	virtual int		GetPlaybackStartTick( void );
+	virtual int		GetPlaybackTick( void );
+	virtual float	GetPlaybackTimeScale( void );
+	virtual int		GetTotalTicks( void );
+
+	virtual bool	IsPlayingBack( void );
+	virtual bool	IsPlaybackPaused( void );
+	virtual bool	IsPlayingTimeDemo( void );
+	virtual bool	IsSkipping( void );
+	virtual bool	CanSkipBackwards( void ) { return false; }
+	
+	virtual void	SetPlaybackTimeScale( float timescale );
+	virtual void	InterpolateViewpoint(); // override viewpoint
+	virtual netpacket_t *ReadPacket( void );
+	virtual void	ResetDemoInterpolation( void );
+	virtual int		GetProtocolVersion();
+
+	virtual bool	ShouldLoopDemos() { return true; }
+	virtual void	OnLastDemoInLoopPlayed() {}
+
+	virtual bool	IsLoading( void );
+
+public:	// other public functions
+	void	MarkFrame( float flFPSVariability );
+	void	SetBenchframe( int tick, const char *filename );
+	void	ResyncDemoClock( void );
+	bool	CheckPausedPlayback( void );
+	void	WriteTimeDemoResults( void );
+	bool	ParseAheadForInterval( int curtick, int intervalticks );
+	void	InterpolateDemoCommand( int targettick, DemoCommandQueue& prev, DemoCommandQueue& next );
+
+protected:
+	bool	OverrideView( democmdinfo_t& info );
+
+	virtual void	OnStopCommand();
+
+public:
+	
+	CDemoFile		m_DemoFile;
+	int				m_nStartTick;	// For synchronizing playback during timedemo.
+	int				m_nPreviousTick;
+	netpacket_t		m_DemoPacket;	// last read demo packet
+	bool			m_bPlayingBack; // true if demo playback
+	bool			m_bPlaybackPaused; // true if demo is paused right now
+	float			m_flAutoResumeTime; // how long do we pause demo playback
+	float			m_flPlaybackRateModifier;
+	int				m_nSkipToTick;	// skip to tick ASAP, -1 = off
+	int				m_nEndTick; // if nonzero, stop playback once we reach this tick
+	bool			m_bLoading; // true if demo is loading
+
+	unsigned		m_nSkipPacketsPlayed; // Track consecutive skip packets returned to avoid excess
+
+	// view origin/angle interpolation:
+	CUtlVector< DemoCommandQueue >	m_DestCmdInfo;
+	democmdinfo_t					m_LastCmdInfo;
+	bool							m_bInterpolateView;
+	bool							m_bResetInterpolation;
+
+
+	// timedemo stuff:
+	bool			m_bTimeDemo;	// ture if in timedemo mode
+	int				m_nTimeDemoStartFrame;	// host_tickcount at start
+	double			m_flTimeDemoStartTime;	// Sys_FloatTime() at second frame of timedemo
+	float			m_flTotalFPSVariability; // Frame rate variability
+	int				m_nTimeDemoCurrentFrame; // last frame we read a packet
+	
+	// benchframe stuff
+	int				m_nSnapshotTick;
+	char			m_SnapshotFilename[MAX_OSPATH];
+};
+
+class CDemoRecorder : public IDemoRecorder 
+{
+public:
+	~CDemoRecorder();
+	CDemoRecorder();
+
+	CDemoFile *GetDemoFile( void );
+	int		GetRecordingTick( void );
+
+	void	StartRecording( const char *filename, bool bContinuously );
+	void	SetSignonState( int state );
+	bool	IsRecording( void );
+	void	PauseRecording( void );
+	void	ResumeRecording( void );
+	void	StopRecording( void );
+	
+	void	RecordCommand( const char *cmdstring );  // record a console command
+	void	RecordUserInput( int cmdnumber );  // record a user input command
+	void	RecordMessages( bf_read &data, int bits ); // add messages to current packet
+	void	RecordPacket( void ); // packet finished, write all recorded stuff to file
+	void	RecordServerClasses( ServerClass *pClasses ); // packet finished, write all recorded stuff to file
+	void	RecordStringTables(); 
+
+	void	ResetDemoInterpolation( void );
+
+protected:
+
+	void	ResyncDemoClock( void );
+	void	StartupDemoFile( void );
+	void	StartupDemoHeader( void );
+	void	CloseDemoFile( void );
+	void	GetClientCmdInfo( democmdinfo_t& info );
+	void	WriteDemoCvars( void );
+	void	WriteBSPDecals( void );
+	void	WriteMessages( bf_write &message );
+	bool	ComputeNextIncrementalDemoFilename( char *name, int namesize );
+
+public:
+	CDemoFile		m_DemoFile;
+
+	// For synchronizing playback during timedemo.
+	int				m_nStartTick; // host_tickcount when starting recoring
+
+	// Name of demo file we are appending onto.
+	char			m_szDemoBaseName[ MAX_OSPATH ];  
+
+	// For demo file handle
+	bool			m_bIsDemoHeader;	// true, if m_hDemoFile is the header file
+	bool			m_bCloseDemoFile;	// if true, demo file will be closed ASAP
+
+	bool			m_bRecording;	  // true if recording
+	bool			m_bContinuously; // start new record after each
+	int				m_nDemoNumber;	// demo count, increases each changelevel
+	int				m_nFrameCount;	// # of demo frames in this segment.
+
+	bf_write		m_MessageData; // temp buffer for all network messages
+
+	bool			m_bResetInterpolation;
+};
+
+extern CDemoRecorder *g_pClientDemoRecorder;
+
+inline CDemoPlayer *ToClientDemoPlayer( IDemoPlayer *pDemoPlayer )
+{
+	return static_cast< CDemoPlayer * >( pDemoPlayer );
+}
+
+#endif // CL_DEMO_H