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avformat/mov: Use 64bit in intermediate for current_dts

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Fixes: CID1500304 Unintentional integer overflow
Fixes: CID1500318 Unintentional integer overflow

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2024-06-03 03:17:27 +02:00
parent 019fce18bb
commit 0c977d37aa
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GPG Key ID: B18E8928B3948D64
1 changed files with 2 additions and 2 deletions
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libavformat/mov.c
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@ -3389,12 +3389,12 @@ static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
corrected_dts += sample_duration * sample_count;
}
current_dts += sc->stts_data[i].duration * sample_count;
current_dts += sc->stts_data[i].duration * (int64_t)sample_count;
if (current_dts > corrected_dts) {
int64_t drift = (current_dts - corrected_dts)/FFMAX(sample_count, 1);
uint32_t correction = (sc->stts_data[i].duration > drift) ? drift : sc->stts_data[i].duration - 1;
current_dts -= correction * sample_count;
current_dts -= correction * (uint64_t)sample_count;
sc->stts_data[i].duration -= correction;
}