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Wei-ting Lin authored
Originally we need to send the refresh flag and the virtual indices mapping for the reference frame buffer update for show_existing_frame to have the BWDREF_FRAME replace the LAST_FRAME. To remove sending this information, we update the the virtual indices of the reference frame buffer after the last_bipred_frame is encoded, and therefore the decoder will receive the updated reference mapping at the next non-show-existing frame. As a result, we can save 4 bytes per show-existing frame, and get 0.12, 0.2, and 0.07 BDRATE improvement in lowres, derf, and midref test set respectively. Change-Id: I63d41ee6ea99884798f0778b789d2701e2f2d3e0
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