libavcodec/h261.c

   1 /*
   2  * H261 common code
   3  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   4  * Copyright (c) 2004 Maarten Daniels
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file libavcodec/h261.c
  25  * h261codec.
  26  */
  27
  28 #include "dsputil.h"
  29 #include "avcodec.h"
  30 #include "h261.h"
  31
  32 #define IS_FIL(a)    ((a)&MB_TYPE_H261_FIL)
  33
  34 uint8_t ff_h261_rl_table_store[2][2*MAX_RUN + MAX_LEVEL + 3];
  35
  36 void ff_h261_loop_filter(MpegEncContext *s){
  37     H261Context * h= (H261Context*)s;
  38     const int linesize  = s->linesize;
  39     const int uvlinesize= s->uvlinesize;
  40     uint8_t *dest_y = s->dest[0];
  41     uint8_t *dest_cb= s->dest[1];
  42     uint8_t *dest_cr= s->dest[2];
  43
  44     if(!(IS_FIL (h->mtype)))
  45         return;
  46
  47     s->dsp.h261_loop_filter(dest_y                   , linesize);
  48     s->dsp.h261_loop_filter(dest_y                + 8, linesize);
  49     s->dsp.h261_loop_filter(dest_y + 8 * linesize    , linesize);
  50     s->dsp.h261_loop_filter(dest_y + 8 * linesize + 8, linesize);
  51     s->dsp.h261_loop_filter(dest_cb, uvlinesize);
  52     s->dsp.h261_loop_filter(dest_cr, uvlinesize);
  53 }
  54