diff options
| author | Loren Merritt <lorenm@u.washington.edu> | 2006-02-08 07:04:32 +0000 |
|---|---|---|
| committer | Loren Merritt <lorenm@u.washington.edu> | 2006-02-08 07:04:32 +0000 |
| commit | c0234aa44ceed5dbb2d5e5994d1c0c238a9fd490 (patch) | |
| tree | ee46b330e2b81b1d857951016865cd81be109730 /libavcodec/h264.c | |
| parent | 4accd1fd1854486403108fa9a4288ff4da0ff82b (diff) | |
slightly faster loopfilter
Originally committed as revision 4958 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/h264.c')
| -rw-r--r-- | libavcodec/h264.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/libavcodec/h264.c b/libavcodec/h264.c index e80a3992c2..cd21c26037 100644 --- a/libavcodec/h264.c +++ b/libavcodec/h264.c @@ -6547,6 +6547,18 @@ static void filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8 * frame numbers, not indices. */ static const int ref2frm[18] = {-1,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; + //for sufficiently low qp, filtering wouldn't do anything + //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp + if(!h->mb_aff_frame){ + int qp_thresh = 15 - h->slice_alpha_c0_offset - FFMAX(0, h->pps.chroma_qp_index_offset); + int qp = s->current_picture.qscale_table[mb_xy]; + if(qp <= qp_thresh + && (mb_x == 0 || ((qp + s->current_picture.qscale_table[mb_xy-1] + 1)>>1) <= qp_thresh) + && (mb_y == 0 || ((qp + s->current_picture.qscale_table[h->top_mb_xy] + 1)>>1) <= qp_thresh)){ + return; + } + } + if (h->mb_aff_frame // left mb is in picture && h->slice_table[mb_xy-1] != 255 @@ -6617,8 +6629,8 @@ static void filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8 const int mbm_type = s->current_picture.mb_type[mbm_xy]; int start = h->slice_table[mbm_xy] == 255 ? 1 : 0; - const int edges = ((mb_type & mbm_type) & (MB_TYPE_16x16|MB_TYPE_SKIP)) - == (MB_TYPE_16x16|MB_TYPE_SKIP) ? 1 : 4; + const int edges = (mb_type & (MB_TYPE_16x16|MB_TYPE_SKIP)) + == (MB_TYPE_16x16|MB_TYPE_SKIP) ? 1 : 4; // how often to recheck mv-based bS when iterating between edges const int mask_edge = (mb_type & (MB_TYPE_16x16 | (MB_TYPE_16x8 << dir))) ? 3 : (mb_type & (MB_TYPE_8x16 >> dir)) ? 1 : 0; |