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avfilter/vf_cover_rect: clip rectangle if it is partly outside the input
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -163,6 +163,17 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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return ff_filter_frame(ctx->outputs[0], in);
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}
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if (x < 0) {
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w += x;
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x = 0;
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}
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if (y < 0) {
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h += y;
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y = 0;
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}
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w = FFMIN(w, in->width - x);
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h = FFMIN(h, in->height - y);
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if (w > in->width || h > in->height || w <= 0 || h <= 0)
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return AVERROR(EINVAL);
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