FWGS/xash3d-fwgs
2
0
Fork 0
mirror of https://github.com/FWGS/xash3d-fwgs synced 2024-11-22 01:45:19 +01:00
Code Issues 2 Projects Releases Wiki Activity

engine: client: s_mix: attempt to fix S_InterpolateCubic2x buffer overflow

Browse Source
This commit is contained in:
Alibek Omarov 2024-11-06 03:22:56 +03:00
parent 8a8cdd2927
commit d1a571201b
1 changed files with 5 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
engine/client/s_mix.c
View File

@ -696,7 +696,8 @@ static void S_Interpolate2xCubic( portable_samplepair_t *pbuffer, portable_sampl
// c = (x1 - xm1) / 2;
// y [outpos] = (((a * finpos) + b) * finpos + c) * finpos + x0;
int i, upCount = count << 1;
int i;
const int upCount = Q_min( count << 1, PAINTBUFFER_SIZE );
int a, b, c;
int xm1, x0, x1, x2;
portable_samplepair_t *psamp0;
@ -705,8 +706,6 @@ static void S_Interpolate2xCubic( portable_samplepair_t *pbuffer, portable_sampl
portable_samplepair_t *psamp3;
int outpos = 0;
Assert( upCount <= PAINTBUFFER_SIZE );
// pfiltermem holds 6 samples from previous buffer pass
// process 'count' samples
for( i = 0; i < count; i++)
@ -748,7 +747,8 @@ static void S_Interpolate2xCubic( portable_samplepair_t *pbuffer, portable_sampl
// write out interpolated sample, increment output counter
temppaintbuffer[outpos++].right = a/8 + b/4 + c/2 + x0;
Assert( outpos <= ( sizeof( temppaintbuffer ) / sizeof( temppaintbuffer[0] )));
if( outpos > ARRAYSIZE( temppaintbuffer ))
break;
}
Assert( cfltmem >= 3 );
@ -759,8 +759,7 @@ static void S_Interpolate2xCubic( portable_samplepair_t *pbuffer, portable_sampl
pfiltermem[2] = pbuffer[upCount - 1];
// copy temppaintbuffer back into paintbuffer
for( i = 0; i < upCount; i++ )
pbuffer[i] = temppaintbuffer[i];
memcpy( pbuffer, temppaintbuffer, sizeof( *pbuffer ) * upCount );
}
// pass forward over passed in buffer and linearly interpolate all odd samples