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/*
* Copyright (c) 2010 David Conrad
*
* 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" |
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#include "internal.h" |
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#include "riff.h"
#include "libavutil/intreadwrite.h"
static int probe(AVProbeData *p)
{
if (AV_RL32(p->buf) == MKTAG('D','K','I','F')
&& !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32)
return AVPROBE_SCORE_MAX-2;
return 0;
}
static int read_header(AVFormatContext *s, AVFormatParameters *ap)
{
AVStream *st;
AVRational time_base;
|
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avio_rl32(s->pb); // DKIF
avio_rl16(s->pb); // version
avio_rl16(s->pb); // header size |
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|
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st = avformat_new_stream(s, NULL); |
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if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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st->codec->codec_tag = avio_rl32(s->pb); |
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st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag); |
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st->codec->width = avio_rl16(s->pb);
st->codec->height = avio_rl16(s->pb);
time_base.den = avio_rl32(s->pb);
time_base.num = avio_rl32(s->pb);
st->duration = avio_rl64(s->pb); |
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st->need_parsing = AVSTREAM_PARSE_HEADERS;
if (!time_base.den || !time_base.num) {
av_log(s, AV_LOG_ERROR, "Invalid frame rate\n");
return AVERROR_INVALIDDATA;
}
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avpriv_set_pts_info(st, 64, time_base.num, time_base.den); |
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return 0;
}
static int read_packet(AVFormatContext *s, AVPacket *pkt)
{ |
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int ret, size = avio_rl32(s->pb);
int64_t pts = avio_rl64(s->pb); |
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ret = av_get_packet(s->pb, pkt, size);
pkt->stream_index = 0;
pkt->pts = pts;
pkt->pos -= 12;
return ret;
}
|
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AVInputFormat ff_ivf_demuxer = { |
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.name = "ivf",
.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
.read_probe = probe,
.read_header = read_header,
.read_packet = read_packet, |
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.flags= AVFMT_GENERIC_INDEX,
.codec_tag = (const AVCodecTag*[]){ff_codec_bmp_tags, 0},
}; |