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avfilter/vf_exposure: ensure that scale is always > 0

This commit is contained in:
Paul B Mahol 2022-12-04 13:19:50 +01:00
parent ec32c62cad
commit fc016fd665
1 changed files with 3 additions and 1 deletions
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4
libavfilter/vf_exposure.c
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@ -67,8 +67,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
ExposureContext *s = ctx->priv;
float diff = fabsf(exp2f(-s->exposure) - s->black);
s->scale = 1.f / (exp2f(-s->exposure) - s->black);
diff = diff > 0.f ? diff : 1.f / 1024.f;
s->scale = 1.f / diff;
ff_filter_execute(ctx, s->do_slice, frame, NULL,
FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));