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swscale/output: Fix integer overflow in alpha in yuv2rgba64_1_c_template()

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Fixes: signed integer overflow: -1548257 * 2048 cannot be represented in type 'int'
Fixes: #21592

Found-by: HAORAN FANG
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2026-03-03 20:56:31 +01:00
parent 946ce12e1c
commit 1e63151355
1 changed files with 3 additions and 3 deletions
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libswscale/output.c
+3 -3
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@@ -1272,7 +1272,7 @@ yuv2rgba64_1_c_template(SwsInternal *c, const int32_t *buf0,
{
const int32_t *ubuf0 = ubuf[0], *vbuf0 = vbuf[0];
int i;
int A1 = 0xffff<<14, A2= 0xffff<<14;
SUINT A1 = 0xffff<<14, A2= 0xffff<<14;
if (uvalpha == 0) {
for (i = 0; i < ((dstW + 1) >> 1); i++) {
@@ -1290,8 +1290,8 @@ yuv2rgba64_1_c_template(SwsInternal *c, const int32_t *buf0,
Y2 += (1 << 13) - (1 << 29);
if (hasAlpha) {
A1 = abuf0[i * 2 ] * (1 << 11);
A2 = abuf0[i * 2 + 1] * (1 << 11);
A1 = abuf0[i * 2 ] * (SUINT)(1 << 11);
A2 = abuf0[i * 2 + 1] * (SUINT)(1 << 11);
A1 += 1 << 13;
A2 += 1 << 13;