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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 | ||
*/ | ||
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#include "avformat.h" | ||
#include "riff.h" | ||
#include "libavutil/intreadwrite.h" | ||
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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; | ||
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return 0; | ||
} | ||
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static int read_header(AVFormatContext *s, AVFormatParameters *ap) | ||
{ | ||
AVStream *st; | ||
AVRational time_base; | ||
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get_le32(s->pb); // DKIF | ||
get_le16(s->pb); // version | ||
get_le16(s->pb); // header size | ||
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st = av_new_stream(s, 0); | ||
if (!st) | ||
return AVERROR(ENOMEM); | ||
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | ||
st->codec->codec_tag = get_le32(s->pb); | ||
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag); | ||
st->codec->width = get_le16(s->pb); | ||
st->codec->height = get_le16(s->pb); | ||
time_base.den = get_le32(s->pb); | ||
time_base.num = get_le32(s->pb); | ||
st->duration = get_le64(s->pb); | ||
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st->need_parsing = AVSTREAM_PARSE_HEADERS; | ||
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if (!time_base.den || !time_base.num) { | ||
av_log(s, AV_LOG_ERROR, "Invalid frame rate\n"); | ||
return AVERROR_INVALIDDATA; | ||
} | ||
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av_set_pts_info(st, 64, time_base.num, time_base.den); | ||
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return 0; | ||
} | ||
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static int read_packet(AVFormatContext *s, AVPacket *pkt) | ||
{ | ||
int ret, size = get_le32(s->pb); | ||
int64_t pts = get_le64(s->pb); | ||
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ret = av_get_packet(s->pb, pkt, size); | ||
pkt->stream_index = 0; | ||
pkt->pts = pts; | ||
pkt->pos -= 12; | ||
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return ret; | ||
} | ||
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AVInputFormat ivf_demuxer = { | ||
"ivf", | ||
NULL_IF_CONFIG_SMALL("On2 IVF"), | ||
0, | ||
probe, | ||
read_header, | ||
read_packet, | ||
.flags= AVFMT_GENERIC_INDEX, | ||
.codec_tag = (const AVCodecTag*[]){ff_codec_bmp_tags, 0}, | ||
}; |