2 * Copyright (c) 2010 David Conrad
4 * This file is part of FFmpeg.
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.
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.
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
23 #include "libavutil/intreadwrite.h"
25 static int probe(AVProbeData *p)
27 if (AV_RL32(p->buf) == MKTAG('D','K','I','F')
28 && !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32)
29 return AVPROBE_SCORE_MAX-2;
34 static int read_header(AVFormatContext *s, AVFormatParameters *ap)
39 get_le32(s->pb); // DKIF
40 get_le16(s->pb); // version
41 get_le16(s->pb); // header size
43 st = av_new_stream(s, 0);
45 return AVERROR(ENOMEM);
48 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
49 st->codec->codec_tag = get_le32(s->pb);
50 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag);
51 st->codec->width = get_le16(s->pb);
52 st->codec->height = get_le16(s->pb);
53 time_base.den = get_le32(s->pb);
54 time_base.num = get_le32(s->pb);
55 st->duration = get_le64(s->pb);
57 st->need_parsing = AVSTREAM_PARSE_HEADERS;
59 if (!time_base.den || !time_base.num) {
60 av_log(s, AV_LOG_ERROR, "Invalid frame rate\n");
61 return AVERROR_INVALIDDATA;
64 av_set_pts_info(st, 64, time_base.num, time_base.den);
69 static int read_packet(AVFormatContext *s, AVPacket *pkt)
71 int ret, size = get_le32(s->pb);
72 int64_t pts = get_le64(s->pb);
74 ret = av_get_packet(s->pb, pkt, size);
75 pkt->stream_index = 0;
82 AVInputFormat ivf_demuxer = {
84 NULL_IF_CONFIG_SMALL("On2 IVF"),
89 .flags= AVFMT_GENERIC_INDEX,
90 .codec_tag = (const AVCodecTag*[]){ff_codec_bmp_tags, 0},