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