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check for negative strides before memcpy

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Originally committed as revision 15250 to svn://svn.mplayerhq.hu/mplayer/trunk/postproc
This commit is contained in:
Jindřich Makovička 2005-04-24 07:50:18 +00:00
parent e63ac25d05
commit 12e1166234
1 changed files with 4 additions and 4 deletions
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8
postproc/swscale.c
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@ -1425,7 +1425,7 @@ static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], i
int srcSliceH, uint8_t* dstParam[], int dstStride[]){ int srcSliceH, uint8_t* dstParam[], int dstStride[]){
uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY; uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
/* Copy Y plane */ /* Copy Y plane */
if(dstStride[0]==srcStride[0]) if(dstStride[0]==srcStride[0] && srcStride[0] > 0)
memcpy(dst, src[0], srcSliceH*dstStride[0]); memcpy(dst, src[0], srcSliceH*dstStride[0]);
else else
{ {
@ -1559,7 +1559,7 @@ static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int
int i; int i;
/* copy Y */ /* copy Y */
if(srcStride[0]==dstStride[0]) if(srcStride[0]==dstStride[0] && srcStride[0] > 0)
memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH); memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);
else{ else{
uint8_t *srcPtr= src[0]; uint8_t *srcPtr= src[0];
@ -1633,7 +1633,7 @@ static int simpleCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSli
if(isPacked(c->srcFormat)) if(isPacked(c->srcFormat))
{ {
if(dstStride[0]==srcStride[0]) if(dstStride[0]==srcStride[0] && srcStride[0] > 0)
memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]); memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);
else else
{ {
@ -1671,7 +1671,7 @@ static int simpleCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSli
} }
else else
{ {
if(dstStride[plane]==srcStride[plane]) if(dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)
memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]); memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);
else else
{ {