mirror of https://git.ffmpeg.org/ffmpeg.git
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*
|
|
* MODS demuxer
|
|
* Copyright (c) 2020 Paul B Mahol
|
|
*
|
|
* 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 "libavutil/intreadwrite.h"
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
static int mods_probe(const AVProbeData *p)
|
|
{
|
|
if (memcmp(p->buf, "MODSN3\x0a\x00", 8))
|
|
return 0;
|
|
if (AV_RB32(p->buf + 8) == 0)
|
|
return 0;
|
|
if (AV_RB32(p->buf + 12) == 0)
|
|
return 0;
|
|
if (AV_RB32(p->buf + 16) == 0)
|
|
return 0;
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
static int mods_read_header(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
AVRational fps;
|
|
int64_t pos;
|
|
|
|
AVStream *st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
avio_skip(pb, 8);
|
|
|
|
st->nb_frames = avio_rl32(pb);
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_MOBICLIP;
|
|
st->codecpar->width = avio_rl32(pb);
|
|
st->codecpar->height = avio_rl32(pb);
|
|
|
|
fps.num = avio_rl32(pb);
|
|
fps.den = 0x1000000;
|
|
avpriv_set_pts_info(st, 64, fps.den, fps.num);
|
|
|
|
avio_skip(pb, 16);
|
|
|
|
pos = avio_rl32(pb) + 4;
|
|
avio_seek(pb, pos, SEEK_SET);
|
|
pos = avio_rl32(pb);
|
|
avio_seek(pb, pos, SEEK_SET);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mods_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
unsigned size;
|
|
int64_t pos;
|
|
int ret;
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
|
|
pos = avio_tell(pb);
|
|
size = avio_rl32(pb) >> 14;
|
|
ret = av_get_packet(pb, pkt, size);
|
|
pkt->pos = pos;
|
|
pkt->stream_index = 0;
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_mods_demuxer = {
|
|
.name = "mods",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MobiClip MODS"),
|
|
.read_probe = mods_probe,
|
|
.read_header = mods_read_header,
|
|
.read_packet = mods_read_packet,
|
|
.extensions = "mods",
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
};
|