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96 lines
2.3 KiB
96 lines
2.3 KiB
/* |
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* Copyright (c) 2009 Michael Niedermayer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avformat.h" |
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static int probe(AVProbeData *p) |
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{ |
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// the single file i have starts with that, i dont know if others do too |
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if( p->buf[0] == 1 |
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&& p->buf[1] == 1 |
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&& p->buf[2] == 3 |
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&& p->buf[3] == 0xB8 |
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&& p->buf[4] == 0x80 |
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&& p->buf[5] == 0x60 |
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) |
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return AVPROBE_SCORE_MAX-2; |
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return 0; |
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} |
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static int read_header(AVFormatContext *s, AVFormatParameters *ap) |
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{ |
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AVStream *st; |
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st = av_new_stream(s, 0); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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st->codec->codec_id = CODEC_ID_MPEG4; |
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st->need_parsing = AVSTREAM_PARSE_FULL; |
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av_set_pts_info(st, 64, 1, 90000); |
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return 0; |
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} |
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static int read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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int ret, size, pts, type; |
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retry: |
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type= avio_rb16(s->pb); // 257 or 258 |
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size= avio_rb16(s->pb); |
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avio_rb16(s->pb); //some flags, 0x80 indicates end of frame |
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avio_rb16(s->pb); //packet number |
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pts=avio_rb32(s->pb); |
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avio_rb32(s->pb); //6A 13 E3 88 |
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size -= 12; |
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if(size<1) |
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return -1; |
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if(type==258){ |
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avio_skip(s->pb, size); |
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goto retry; |
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} |
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ret= av_get_packet(s->pb, pkt, size); |
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pkt->pts= pts; |
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pkt->pos-=16; |
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pkt->stream_index = 0; |
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return ret; |
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} |
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AVInputFormat ff_iv8_demuxer = { |
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"iv8", |
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NULL_IF_CONFIG_SMALL("A format generated by IndigoVision 8000 video server"), |
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0, |
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probe, |
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read_header, |
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read_packet, |
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.flags= AVFMT_GENERIC_INDEX, |
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.value = CODEC_ID_MPEG4, |
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};
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