Statistics
| Branch: | Revision:

ffmpeg / libavformat / iv8.c @ e63a3628

History | View | Annotate | Download (2.3 KB)

1 00b6fa40 Michael Niedermayer
/*
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
24
static 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
39
static 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 72415b2a Stefano Sabatini
    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
48 00b6fa40 Michael Niedermayer
    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
56
static int read_packet(AVFormatContext *s, AVPacket *pkt)
57
{
58 f2d56513 Michael Niedermayer
    int ret, size, pts, type;
59
retry:
60 e63a3628 Anton Khirnov
    type= avio_rb16(s->pb); // 257 or 258
61
    size= avio_rb16(s->pb);
62 00b6fa40 Michael Niedermayer
63 e63a3628 Anton Khirnov
    avio_rb16(s->pb); //some flags, 0x80 indicates end of frame
64
    avio_rb16(s->pb); //packet number
65
    pts=avio_rb32(s->pb);
66
    avio_rb32(s->pb); //6A 13 E3 88
67 00b6fa40 Michael Niedermayer
68
    size -= 12;
69
    if(size<1)
70
        return -1;
71
72 f2d56513 Michael Niedermayer
    if(type==258){
73
        url_fskip(s->pb, size);
74
        goto retry;
75
    }
76
77 00b6fa40 Michael Niedermayer
    ret= av_get_packet(s->pb, pkt, size);
78
79 f2d56513 Michael Niedermayer
    pkt->pts= pts;
80 00b6fa40 Michael Niedermayer
    pkt->pos-=16;
81
82
    pkt->stream_index = 0;
83
84
    return ret;
85
}
86
87 66355be3 Diego Elio Pettenò
AVInputFormat ff_iv8_demuxer = {
88 00b6fa40 Michael Niedermayer
    "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
};