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avfilter/af_astats: make sure p->last is actually always set when measuring max difference

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-07-15 19:24:37 +00:00
parent 59a9998908
commit 51925daafd
1 changed files with 2 additions and 1 deletions
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3
libavfilter/af_astats.c
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@ -104,6 +104,7 @@ static void reset_stats(AudioStatsContext *s)
p->min = p->min_sigma_x2 = DBL_MAX;
p->max = p->max_sigma_x2 = DBL_MIN;
p->max_diff = -1;
}
}
@ -161,7 +162,7 @@ static inline void update_stat(AudioStatsContext *s, ChannelStats *p, double d)
p->sigma_x += d;
p->sigma_x2 += d * d;
p->avg_sigma_x2 = p->avg_sigma_x2 * s->mult + (1.0 - s->mult) * d * d;
p->max_diff = FFMAX(p->max_diff, FFABS(d - p->last));
p->max_diff = FFMAX(p->max_diff, FFABS(d - (p->max_diff == -1 ? d : p->last)));
p->last = d;
p->mask |= llrint(d * (1LLU<<63));