mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
2.5 KiB
91 lines
2.5 KiB
/* |
|
* 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" |
|
#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; |
|
|
|
get_le32(s->pb); // DKIF |
|
get_le16(s->pb); // version |
|
get_le16(s->pb); // header size |
|
|
|
st = av_new_stream(s, 0); |
|
if (!st) |
|
return AVERROR(ENOMEM); |
|
|
|
|
|
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); |
|
|
|
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; |
|
} |
|
|
|
av_set_pts_info(st, 64, time_base.num, time_base.den); |
|
|
|
return 0; |
|
} |
|
|
|
static int read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
int ret, size = get_le32(s->pb); |
|
int64_t pts = get_le64(s->pb); |
|
|
|
ret = av_get_packet(s->pb, pkt, size); |
|
pkt->stream_index = 0; |
|
pkt->pts = pts; |
|
pkt->pos -= 12; |
|
|
|
return ret; |
|
} |
|
|
|
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}, |
|
};
|
|
|