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David Barker authored
When forming a scaled prediction, we need to clamp against the extended frame border which was set up when the relevant reference frame was decoded. The width of this border actually depends on the subsampling mode (for UV planes), but before this patch we were always using the Y plane's border width. This resulted in bad predictions when signalling a motion vector which points far outside the reference frame. This patch fixes the clamping, and restores the intended behaviour for out-of-frame motion vectors. Change-Id: I2cf575ce339a3e22a3c8444de0d0c3be031007c9
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