/*
  * MJPEG 2000 Demuxer
  * Copyright (c) 2016 Ståle Kristoffersen
  *
  * 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 "libavutil/intreadwrite.h"
 #include "avformat.h"
 #include "rawdec.h"
 
 #if CONFIG_MJPEG_2000_DEMUXER

 static int mjpeg2000_probe(const AVProbeData *p)

 {
     const uint8_t *b = p->buf;
     int i, marker, marker_size;
     int frames = 0, invalid = 0;
 
     for (i = 0; i < p->buf_size - 5; i++) {
         if (AV_RB32(b) == 0xff4fff51){
             marker_size = AV_RB16(b+4);
             if (marker_size + i < p->buf_size - 4) {
                 marker = AV_RB8(b+4+marker_size);
                 if (marker == 0xff)
                     frames++;
                 else
                     invalid++;
             }
         }
         b += 1;
     }
     if (invalid*4 + 1 < frames) {
         if (invalid == 0 && frames > 2)
             return AVPROBE_SCORE_EXTENSION / 2;
         return AVPROBE_SCORE_EXTENSION / 4;
     }
     return 0;
 }
 FF_DEF_RAWVIDEO_DEMUXER2(mjpeg_2000, "raw MJPEG 2000 video", mjpeg2000_probe, "j2k", AV_CODEC_ID_JPEG2000, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS)
 #endif