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ffmpeg.wasm-core
Commit bc721ac9 authored by Michael Niedermayer's avatar Michael Niedermayer
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swscale/utils: Fix potential overflow of dstPos*xInc before converting to 64bit 

Fixes CID1061053
Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent 0b5d1b88
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Showing with 3 additions and 3 deletions
libswscale/utils.c
View file @ bc721ac9
......@@ -299,7 +299,7 @@ static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
FF_ALLOC_OR_GOTO(NULL, filter,
dstW * sizeof(*filter) * filterSize, fail);
xDstInSrc = ((dstPos*xInc)>>8) - ((srcPos*0x8000)>>7);
xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000)>>7);
for (i = 0; i < dstW; i++) {
int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
......@@ -315,7 +315,7 @@ static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
FF_ALLOC_OR_GOTO(NULL, filter,
dstW * sizeof(*filter) * filterSize, fail);
xDstInSrc = ((dstPos*xInc)>>8) - ((srcPos*0x8000)>>7);
xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000)>>7);
for (i = 0; i < dstW; i++) {
int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
int j;
......@@ -366,7 +366,7 @@ static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
FF_ALLOC_OR_GOTO(NULL, filter,
dstW * sizeof(*filter) * filterSize, fail);
xDstInSrc = ((dstPos*xInc)>>7) - ((srcPos*0x10000)>>7);
xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000)>>7);
for (i = 0; i < dstW; i++) {
int xx = (xDstInSrc - ((filterSize - 2) << 16)) / (1 << 17);
int j;
......
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