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Jingning Han authored
The frame marker system supports one to map the reference frame index into the natural order. It allows direct checking on the efficacy of the reference frames given their relative locations with respect to the current coding frame. This commit uses such property to filter out reference frames less likely to contribute coding gains from the rate-distortion optimization process. For example, it takes out the check on last2 / 3 frames, when their actual location is further away from the golden frame. The AWCY results show 0.6% performance regression. The encoding speed gets doubled. To use the speed up, one needs to turn on frame-marker experiment before we turn it on by default, and enable selective_ref_frame entry in the speed feature. Change-Id: Ifb03ed90acd980bbc7ff1c2e17982e21e68d2588
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