| /* |
| * 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_skip(s->pb, size); |
| 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, |
| }; |