tree 7924aeda5eb013cc40e0147c148abec3c0eddb15
parent e11600c0b521b30eba21f0213bc8de60469ffd93
author Ravi Chaudhary <ravi.chaudhary@ittiam.com> 1585018278 +0530
committer Yunqing Wang <yunqingwang@google.com> 1585238720 +0000

Optimize PC_TREE to store only winner mode info

PC_TREE is modified to store only the winner reference
mode information. Size of ref_mv_stack, weight,
mode_context and ref_mv_count is reduced in PC_TREE.

Observed memory footprint reduction with similar
encoding time.

Resolution    Tile     Memory reduction
                       Single   Multi
                       Thread   Thread
640x360       2x1      ~16%    ~25% (2 threads)
832x480       2x1      ~13%    ~21% (2 threads)
1280x720      2x2      ~10%    ~25% (4 threads)
1920x1080     4x2      ~5%     ~25% (8 threads)

Memory measuring command:
$ command time -v ./aomenc ...

Change-Id: I5675d289b89b6deabd11274f4210dd81c058b44c