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sws_scale: check input against NULL

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-07 21:48:27 +01:00
parent 710c4baf52
commit 320ae9fb78
1 changed files with 9 additions and 2 deletions
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11
libswscale/swscale.c
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@ -789,10 +789,17 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
const int dstStride[]) const int dstStride[])
{ {
int i, ret; int i, ret;
const uint8_t *src2[4] = { srcSlice[0], srcSlice[1], srcSlice[2], srcSlice[3] }; const uint8_t *src2[4];
uint8_t *dst2[4] = { dst[0], dst[1], dst[2], dst[3] }; uint8_t *dst2[4];
uint8_t *rgb0_tmp = NULL; uint8_t *rgb0_tmp = NULL;
if (!srcSlice || !dstStride || !dst || !srcSlice) {
av_log(c, AV_LOG_ERROR, "One of the input parameters to sws_scale() is NULL, please check the calling code\n");
return 0;
}
memcpy(src2, srcSlice, sizeof(src2));
memcpy(dst2, dst, sizeof(dst2));
// do not mess up sliceDir if we have a "trailing" 0-size slice // do not mess up sliceDir if we have a "trailing" 0-size slice
if (srcSliceH == 0) if (srcSliceH == 0)
return 0; return 0;