/*
  * RAW H.264 video demuxer
  * Copyright (c) 2008 Michael Niedermayer <michaelni@gmx.at>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "avformat.h"

 #include "rawdec.h"

 
 static int h264_probe(AVProbeData *p)
 {
     uint32_t code= -1;
     int sps=0, pps=0, idr=0, res=0, sli=0;
     int i;
 
     for(i=0; i<p->buf_size; i++){
         code = (code<<8) + p->buf[i];
         if ((code & 0xffffff00) == 0x100) {
             int ref_idc= (code>>5)&3;
             int type   = code & 0x1F;
             static const int8_t ref_zero[32]={
                 2, 0, 0, 0, 0,-1, 1,-1,
                -1, 1, 1, 1, 1,-1, 2, 2,
                 2, 2, 2, 0, 2, 2, 2, 2,
                 2, 2, 2, 2, 2, 2, 2, 2
             };
 
             if(code & 0x80) //forbidden bit
                 return 0;
 
             if(ref_zero[type] == 1 && ref_idc)
                 return 0;
             if(ref_zero[type] ==-1 && !ref_idc)
                 return 0;
             if(ref_zero[type] == 2)
                 res++;
 
             switch(type){
             case     1:   sli++; break;
             case     5:   idr++; break;
             case     7:

                 if(p->buf[i+2]&0x03)

                     return 0;
                 sps++;
                 break;
             case     8:   pps++; break;
             }
         }
     }
     if(sps && pps && (idr||sli>3) && res<(sps+pps+idr))
         return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
     return 0;
 }
 

 FF_DEF_RAWVIDEO_DEMUXER(h264 , "raw H.264 video format", h264_probe, "h26l,h264,264", CODEC_ID_H264)