mirror of https://git.ffmpeg.org/ffmpeg.git
avfilter/vf_exposure: ensure that scale is always > 0
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@ -67,8 +67,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterContext *ctx = inlink->dst;
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ExposureContext *s = ctx->priv;
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ExposureContext *s = ctx->priv;
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float diff = fabsf(exp2f(-s->exposure) - s->black);
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s->scale = 1.f / (exp2f(-s->exposure) - s->black);
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diff = diff > 0.f ? diff : 1.f / 1024.f;
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s->scale = 1.f / diff;
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ff_filter_execute(ctx, s->do_slice, frame, NULL,
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ff_filter_execute(ctx, s->do_slice, frame, NULL,
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FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
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FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
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