mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/h264_parser: saturate dts a bit
Fixes: signed integer overflow: 0 - -9223372036854775808 cannot be represented in type 'long' Fixes: 51896/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-6112289464123392 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -641,10 +641,10 @@ static int h264_parse(AVCodecParserContext *s,
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int64_t num = time_base.num * (int64_t)avctx->pkt_timebase.den;
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if (s->dts != AV_NOPTS_VALUE) {
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// got DTS from the stream, update reference timestamp
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p->reference_dts = s->dts - av_rescale(s->dts_ref_dts_delta, num, den);
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p->reference_dts = av_sat_sub64(s->dts, av_rescale(s->dts_ref_dts_delta, num, den));
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} else if (p->reference_dts != AV_NOPTS_VALUE) {
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// compute DTS based on reference timestamp
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s->dts = p->reference_dts + av_rescale(s->dts_ref_dts_delta, num, den);
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s->dts = av_sat_add64(p->reference_dts, av_rescale(s->dts_ref_dts_delta, num, den));
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}
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if (p->reference_dts != AV_NOPTS_VALUE && s->pts == AV_NOPTS_VALUE)
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