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Merge pull request #152 from cinaera/pr_demo

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Fix bug when reading reading chunks with a tick delta of 0
This commit is contained in:
Dennis Felsing 2015-03-11 17:55:51 +01:00
parent 91756cc529 723bf0f6dc
commit 07497523b4
1 changed files with 18 additions and 10 deletions
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28
src/engine/shared/demo.cpp
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@ -15,8 +15,9 @@
#include "snapshot.h"
static const unsigned char gs_aHeaderMarker[7] = {'T', 'W', 'D', 'E', 'M', 'O', 0};
static const unsigned char gs_ActVersion = 4;
static const unsigned char gs_ActVersion = 5;
static const unsigned char gs_OldVersion = 3;
static const unsigned char gs_VersionTickCompression = 5; // demo files with this version or higher will use `CHUNKTICKFLAG_TICK_COMPRESSED`
static const int gs_LengthOffset = 152;
static const int gs_NumMarkersOffset = 176;
@ -152,8 +153,10 @@ enum
{
CHUNKTYPEFLAG_TICKMARKER = 0x80,
CHUNKTICKFLAG_KEYFRAME = 0x40, // only when tickmarker is set
CHUNKTICKFLAG_TICK_COMPRESSED = 0x20, // when we store the tick value in the first chunk
CHUNKMASK_TICK = 0x3f,
CHUNKMASK_TICK = 0x1f,
CHUNKMASK_TICK_LEGACY = 0x3f,
CHUNKMASK_TYPE = 0x60,
CHUNKMASK_SIZE = 0x1f,
@ -166,7 +169,7 @@ enum
void CDemoRecorder::WriteTickMarker(int Tick, int Keyframe)
{
if(m_LastTickMarker == -1 || Tick-m_LastTickMarker > 63 || Keyframe)
if(m_LastTickMarker == -1 || Tick-m_LastTickMarker > CHUNKMASK_TICK || Keyframe)
{
unsigned char aChunk[5];
aChunk[0] = CHUNKTYPEFLAG_TICKMARKER;
@ -183,7 +186,7 @@ void CDemoRecorder::WriteTickMarker(int Tick, int Keyframe)
else
{
unsigned char aChunk[1];
aChunk[0] = CHUNKTYPEFLAG_TICKMARKER | (Tick-m_LastTickMarker);
aChunk[0] = CHUNKTYPEFLAG_TICKMARKER | CHUNKTICKFLAG_TICK_COMPRESSED | (Tick-m_LastTickMarker);
io_write(m_File, aChunk, sizeof(aChunk));
}
@ -371,20 +374,25 @@ int CDemoPlayer::ReadChunkHeader(int *pType, int *pSize, int *pTick)
if(Chunk&CHUNKTYPEFLAG_TICKMARKER)
{
// decode tick marker
int Tickdelta = Chunk&(CHUNKMASK_TICK);
int Tickdelta_legacy = Chunk&(CHUNKMASK_TICK_LEGACY); // compatibility
*pType = Chunk&(CHUNKTYPEFLAG_TICKMARKER|CHUNKTICKFLAG_KEYFRAME);
if(Tickdelta == 0)
if(m_Info.m_Header.m_Version < gs_VersionTickCompression && Tickdelta_legacy != 0)
{
*pTick += Tickdelta_legacy;
}
else if(Chunk&(CHUNKTICKFLAG_TICK_COMPRESSED))
{
int Tickdelta = Chunk&(CHUNKMASK_TICK);
*pTick += Tickdelta;
}
else
{
unsigned char aTickdata[4];
if(io_read(m_File, aTickdata, sizeof(aTickdata)) != sizeof(aTickdata))
return -1;
*pTick = (aTickdata[0]<<24) | (aTickdata[1]<<16) | (aTickdata[2]<<8) | aTickdata[3];
}
else
{
*pTick += Tickdelta;
}
}
else