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Restore compatibility with older demo versions

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This commit is contained in:
BeaR 2015-03-11 17:52:18 +01:00
parent 6364e3e176
commit 723bf0f6dc
1 changed files with 9 additions and 2 deletions
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11
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;
@ -155,6 +156,7 @@ enum
CHUNKTICKFLAG_TICK_COMPRESSED = 0x20, // when we store the tick value in the first chunk
CHUNKMASK_TICK = 0x1f,
CHUNKMASK_TICK_LEGACY = 0x3f,
CHUNKMASK_TYPE = 0x60,
CHUNKMASK_SIZE = 0x1f,
@ -372,9 +374,14 @@ int CDemoPlayer::ReadChunkHeader(int *pType, int *pSize, int *pTick)
if(Chunk&CHUNKTYPEFLAG_TICKMARKER)
{
// decode tick marker
int Tickdelta_legacy = Chunk&(CHUNKMASK_TICK_LEGACY); // compatibility
*pType = Chunk&(CHUNKTYPEFLAG_TICKMARKER|CHUNKTICKFLAG_KEYFRAME);
if(Chunk&(CHUNKTICKFLAG_TICK_COMPRESSED))
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;