0,0 → 1,91 |
/* |
* 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 "internal.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; |
} |
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static int read_header(AVFormatContext *s) |
{ |
AVStream *st; |
AVRational time_base; |
|
avio_rl32(s->pb); // DKIF |
avio_rl16(s->pb); // version |
avio_rl16(s->pb); // header size |
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st = avformat_new_stream(s, NULL); |
if (!st) |
return AVERROR(ENOMEM); |
|
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
st->codec->codec_tag = avio_rl32(s->pb); |
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag); |
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; |
} |
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static int read_packet(AVFormatContext *s, AVPacket *pkt) |
{ |
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; |
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return ret; |
} |
|
AVInputFormat ff_ivf_demuxer = { |
.name = "ivf", |
.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"), |
.read_probe = probe, |
.read_header = read_header, |
.read_packet = read_packet, |
.flags = AVFMT_GENERIC_INDEX, |
.codec_tag = (const AVCodecTag* const []){ ff_codec_bmp_tags, 0 }, |
}; |