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engine: common: netchan: only compress with BZip2 when it's efficient

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This commit is contained in:
Alibek Omarov 2024-10-10 23:36:23 +03:00
parent 9188905145
commit 6bdc1941e6
1 changed files with 12 additions and 8 deletions
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20
engine/common/net_chan.c
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@ -744,13 +744,17 @@ static void Netchan_CreateFragments_( netchan_t *chan, sizebuf_t *msg )
{ {
#if !XASH_DEDICATED #if !XASH_DEDICATED
byte pbOut[0x10000]; byte pbOut[0x10000];
uint uSourceSize = MSG_GetNumBytesWritten( msg );
uint uCompressedSize = MSG_GetNumBytesWritten( msg ) - 4; uint uCompressedSize = MSG_GetNumBytesWritten( msg ) - 4;
if( !BZ2_bzBuffToBuffCompress( pbOut, &uCompressedSize, MSG_GetData( msg ), MSG_GetNumBytesWritten( msg ), 9, 0, 30 )) if( !BZ2_bzBuffToBuffCompress( pbOut, &uCompressedSize, MSG_GetData( msg ), uSourceSize, 9, 0, 30 ))
{ {
Con_Reportf( "Compressing split packet with BZip2 (%d -> %d bytes)\n", MSG_GetNumBytesWritten( msg ), uCompressedSize ); if( uCompressedSize < uSourceSize )
memcpy( msg->pData, "BZ2", 4 ); {
memcpy( msg->pData + 4, pbOut, uCompressedSize ); Con_Reportf( "Compressing split packet with BZip2 (%d -> %d bytes)\n", uSourceSize, uCompressedSize );
MSG_SeekToBit( msg, uCompressedSize << 3, SEEK_SET ); memcpy( msg->pData, "BZ2", 4 );
memcpy( msg->pData + 4, pbOut, uCompressedSize );
MSG_SeekToBit( msg, uCompressedSize << 3, SEEK_SET );
}
} }
#else #else
Host_Error( "%s: BZ2 compression is not supported for server", __func__ ); Host_Error( "%s: BZ2 compression is not supported for server", __func__ );
@ -758,9 +762,9 @@ static void Netchan_CreateFragments_( netchan_t *chan, sizebuf_t *msg )
} }
else if( !chan->use_bz2 && !LZSS_IsCompressed( MSG_GetData( msg ))) else if( !chan->use_bz2 && !LZSS_IsCompressed( MSG_GetData( msg )))
{ {
uint uCompressedSize = 0; uint uCompressedSize = 0;
uint uSourceSize = MSG_GetNumBytesWritten( msg ); uint uSourceSize = MSG_GetNumBytesWritten( msg );
byte *pbOut = LZSS_Compress( msg->pData, uSourceSize, &uCompressedSize ); byte *pbOut = LZSS_Compress( msg->pData, uSourceSize, &uCompressedSize );
if( pbOut && uCompressedSize > 0 && uCompressedSize < uSourceSize ) if( pbOut && uCompressedSize > 0 && uCompressedSize < uSourceSize )
{ {