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/*
* Copyright (c) 2009 Michael Niedermayer
*
* 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"
static int probe(AVProbeData *p)
{
// the single file i have starts with that, i dont know if others do too
if( p->buf[0] == 1
&& p->buf[1] == 1
&& p->buf[2] == 3
&& p->buf[3] == 0xB8
&& p->buf[4] == 0x80
&& p->buf[5] == 0x60
)
return AVPROBE_SCORE_MAX-2;
return 0;
}
static int read_header(AVFormatContext *s, AVFormatParameters *ap)
{
AVStream *st;
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_MPEG4;
st->need_parsing = AVSTREAM_PARSE_FULL;
av_set_pts_info(st, 64, 1, 90000);
return 0;
}
static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret, size, pts, type;
retry:
type= avio_rb16(s->pb); // 257 or 258
size= avio_rb16(s->pb);
avio_rb16(s->pb); //some flags, 0x80 indicates end of frame
avio_rb16(s->pb); //packet number
pts=avio_rb32(s->pb);
avio_rb32(s->pb); //6A 13 E3 88
size -= 12;
if(size<1)
return -1;
if(type==258){
avio_seek(s->pb, size, SEEK_CUR);
goto retry;
}
ret= av_get_packet(s->pb, pkt, size);
pkt->pts= pts;
pkt->pos-=16;
pkt->stream_index = 0;
return ret;
}
AVInputFormat ff_iv8_demuxer = {
"iv8",
NULL_IF_CONFIG_SMALL("A format generated by IndigoVision 8000 video server"),
0,
probe,
read_header,
read_packet,
.flags= AVFMT_GENERIC_INDEX,
.value = CODEC_ID_MPEG4,
};
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