diff options
Diffstat (limited to 'libavcodec/h261.c')
| -rw-r--r-- | libavcodec/h261.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/libavcodec/h261.c b/libavcodec/h261.c index c3abdb23a7..1ffd64a5ec 100644 --- a/libavcodec/h261.c +++ b/libavcodec/h261.c @@ -32,6 +32,34 @@ uint8_t ff_h261_rl_table_store[2][2*MAX_RUN + MAX_LEVEL + 3]; +static void h261_loop_filter(uint8_t *src, int stride) +{ + int x,y,xy,yz; + int temp[64]; + + for(x=0; x<8; x++){ + temp[x ] = 4*src[x ]; + temp[x + 7*8] = 4*src[x + 7*stride]; + } + for(y=1; y<7; y++){ + for(x=0; x<8; x++){ + xy = y * stride + x; + yz = y * 8 + x; + temp[yz] = src[xy - stride] + 2*src[xy] + src[xy + stride]; + } + } + + for(y=0; y<8; y++){ + src[ y*stride] = (temp[ y*8] + 2)>>2; + src[7+y*stride] = (temp[7+y*8] + 2)>>2; + for(x=1; x<7; x++){ + xy = y * stride + x; + yz = y * 8 + x; + src[xy] = (temp[yz-1] + 2*temp[yz] + temp[yz+1] + 8)>>4; + } + } +} + void ff_h261_loop_filter(MpegEncContext *s){ H261Context * h= (H261Context*)s; const int linesize = s->linesize; @@ -43,10 +71,10 @@ void ff_h261_loop_filter(MpegEncContext *s){ if(!(IS_FIL (h->mtype))) return; - s->dsp.h261_loop_filter(dest_y , linesize); - s->dsp.h261_loop_filter(dest_y + 8, linesize); - s->dsp.h261_loop_filter(dest_y + 8 * linesize , linesize); - s->dsp.h261_loop_filter(dest_y + 8 * linesize + 8, linesize); - s->dsp.h261_loop_filter(dest_cb, uvlinesize); - s->dsp.h261_loop_filter(dest_cr, uvlinesize); + h261_loop_filter(dest_y, linesize); + h261_loop_filter(dest_y + 8, linesize); + h261_loop_filter(dest_y + 8 * linesize, linesize); + h261_loop_filter(dest_y + 8 * linesize + 8, linesize); + h261_loop_filter(dest_cb, uvlinesize); + h261_loop_filter(dest_cr, uvlinesize); } |