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avfilter/af_adelay: Check sscanf() return value

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Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
This commit is contained in:
Limin Wang 2020-03-29 08:08:05 +08:00
parent ee5d6d2ef8
commit f441fadbcf
1 changed files with 4 additions and 1 deletions
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5
libavfilter/af_adelay.c
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@ -155,7 +155,10 @@ static int config_input(AVFilterLink *inlink)
ret = av_sscanf(arg, "%d%c", &d->delay, &type);
if (ret != 2 || type != 'S') {
div = type == 's' ? 1.0 : 1000.0;
av_sscanf(arg, "%f", &delay);
if (av_sscanf(arg, "%f", &delay) != 1) {
av_log(ctx, AV_LOG_ERROR, "Invalid syntax for delay.\n");
return AVERROR(EINVAL);
}
d->delay = delay * inlink->sample_rate / div;
}