hevc/sao: optimze sao implementation

Multimedia / FFmpeg - Mickaël Raulet [insa-rennes.fr] - 18 July 2014 15:46 UTC

- adding one extra pixel all around the frame- do not copy when SAO is not applied

5% improvement

cherry picked from commit 10fc29fc19a12c4d8168fbe1a954b76386db12d0

d249e68 hevc/sao: optimze sao implementation
libavcodec/hevc.c | 27 +++++++++---
libavcodec/hevc.h | 1 +
libavcodec/hevc_filter.c | 66 +++++++++++++++++++++---------
libavcodec/hevcdsp.h | 4 +-
libavcodec/hevcdsp_template.c | 91 +++++++++++++++++++++--------------------
5 files changed, 117 insertions(+), 72 deletions(-)

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