From ca7c784fdffb9cba9f2b1939c706b71abee9f0a7 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 28 Jan 2010 10:34:06 +0000 Subject: Unroll loops in check_mv() ~6% faster (slow path) loopfilter (should be ~2% overall) Originally committed as revision 21503 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/h264_loopfilter.c | 31 +++++++++++++++++-------------- 1 file changed, 17 insertions(+), 14 deletions(-) (limited to 'libavcodec/h264_loopfilter.c') diff --git a/libavcodec/h264_loopfilter.c b/libavcodec/h264_loopfilter.c index 23d998863d..b99372b191 100644 --- a/libavcodec/h264_loopfilter.c +++ b/libavcodec/h264_loopfilter.c @@ -425,23 +425,26 @@ void ff_h264_filter_mb_fast( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, } static int check_mv(H264Context *h, long b_idx, long bn_idx, int mvy_limit){ - int l; - int v = 0; + int v; - for( l = 0; !v && l < h->list_count; l++ ) { - v |= h->ref_cache[l][b_idx] != h->ref_cache[l][bn_idx] | - h->mv_cache[l][b_idx][0] - h->mv_cache[l][bn_idx][0] + 3 >= 7U | - FFABS( h->mv_cache[l][b_idx][1] - h->mv_cache[l][bn_idx][1] ) >= mvy_limit; - } + v = h->ref_cache[0][b_idx] != h->ref_cache[0][bn_idx] | + h->mv_cache[0][b_idx][0] - h->mv_cache[0][bn_idx][0] + 3 >= 7U | + FFABS( h->mv_cache[0][b_idx][1] - h->mv_cache[0][bn_idx][1] ) >= mvy_limit; + if(h->list_count==2 && !v) + v = h->ref_cache[1][b_idx] != h->ref_cache[1][bn_idx] | + h->mv_cache[1][b_idx][0] - h->mv_cache[1][bn_idx][0] + 3 >= 7U | + FFABS( h->mv_cache[1][b_idx][1] - h->mv_cache[1][bn_idx][1] ) >= mvy_limit; if(h->list_count==2 && v){ - v=0; - for( l = 0; !v && l < 2; l++ ) { - int ln= 1-l; - v |= h->ref_cache[l][b_idx] != h->ref_cache[ln][bn_idx] | - h->mv_cache[l][b_idx][0] - h->mv_cache[ln][bn_idx][0] + 3 >= 7U | - FFABS( h->mv_cache[l][b_idx][1] - h->mv_cache[ln][bn_idx][1] ) >= mvy_limit; - } + if(h->ref_cache[0][b_idx] != h->ref_cache[1][bn_idx] | + h->mv_cache[0][b_idx][0] - h->mv_cache[1][bn_idx][0] + 3 >= 7U | + FFABS( h->mv_cache[0][b_idx][1] - h->mv_cache[1][bn_idx][1] ) >= mvy_limit) + return 1; + if(h->ref_cache[1][b_idx] != h->ref_cache[0][bn_idx] | + h->mv_cache[1][b_idx][0] - h->mv_cache[0][bn_idx][0] + 3 >= 7U | + FFABS( h->mv_cache[1][b_idx][1] - h->mv_cache[0][bn_idx][1] ) >= mvy_limit) + return 1; + return 0; } return v; -- cgit v1.2.1