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avcodec/mpeg4videodec: assert impossible wrap points

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Helps: CID1473517 Uninitialized scalar variable
Helps: CID1473497 Uninitialized scalar variable

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 8fc649b931a3cbc3a2dd9b50b75a9261a2fb4b49)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-05-11 22:08:21 +02:00
parent 39da4ac79b
commit b4fdbbe6aa
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1 changed files with 2 additions and 0 deletions
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libavcodec/mpeg4videodec.c
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@ -597,6 +597,8 @@ static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *g
ctx->sprite_shift[0] = alpha + beta + rho - min_ab; ctx->sprite_shift[0] = alpha + beta + rho - min_ab;
ctx->sprite_shift[1] = alpha + beta + rho - min_ab + 2; ctx->sprite_shift[1] = alpha + beta + rho - min_ab + 2;
break; break;
default:
av_assert0(0);
} }
/* try to simplify the situation */ /* try to simplify the situation */
if (sprite_delta[0][0] == a << ctx->sprite_shift[0] && if (sprite_delta[0][0] == a << ctx->sprite_shift[0] &&