1/* 2 * Copyright (c) 2009 Michael Niedermayer 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#include "avformat.h" 22 23 24static int probe(AVProbeData *p) 25{ 26 // the single file i have starts with that, i dont know if others do too 27 if( p->buf[0] == 1 28 && p->buf[1] == 1 29 && p->buf[2] == 3 30 && p->buf[3] == 0xB8 31 && p->buf[4] == 0x80 32 && p->buf[5] == 0x60 33 ) 34 return AVPROBE_SCORE_MAX-2; 35 36 return 0; 37} 38 39static int read_header(AVFormatContext *s, AVFormatParameters *ap) 40{ 41 AVStream *st; 42 43 st = av_new_stream(s, 0); 44 if (!st) 45 return AVERROR(ENOMEM); 46 47 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 48 st->codec->codec_id = CODEC_ID_MPEG4; 49 st->need_parsing = AVSTREAM_PARSE_FULL; 50 av_set_pts_info(st, 64, 1, 90000); 51 52 return 0; 53 54} 55 56static int read_packet(AVFormatContext *s, AVPacket *pkt) 57{ 58 int ret, size, pts, type; 59retry: 60 type= get_be16(s->pb); // 257 or 258 61 size= get_be16(s->pb); 62 63 get_be16(s->pb); //some flags, 0x80 indicates end of frame 64 get_be16(s->pb); //packet number 65 pts=get_be32(s->pb); 66 get_be32(s->pb); //6A 13 E3 88 67 68 size -= 12; 69 if(size<1) 70 return -1; 71 72 if(type==258){ 73 url_fskip(s->pb, size); 74 goto retry; 75 } 76 77 ret= av_get_packet(s->pb, pkt, size); 78 79 pkt->pts= pts; 80 pkt->pos-=16; 81 82 pkt->stream_index = 0; 83 84 return ret; 85} 86 87AVInputFormat iv8_demuxer = { 88 "iv8", 89 NULL_IF_CONFIG_SMALL("A format generated by IndigoVision 8000 video server"), 90 0, 91 probe, 92 read_header, 93 read_packet, 94 .flags= AVFMT_GENERIC_INDEX, 95 .value = CODEC_ID_MPEG4, 96}; 97