avformat: add MODS demuxer

This commit is contained in:
Paul B Mahol 2020-09-01 11:12:53 +02:00
parent 0a30683a01
commit cfe2c90de0
5 changed files with 104 additions and 1 deletions

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@ -19,6 +19,7 @@ version <next>:
- MobiClip FastAudio decoder
- MobiClip video decoder
- MOFLEX demuxer
- MODS demuxer
version 4.3:

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@ -319,6 +319,7 @@ OBJS-$(CONFIG_MLV_DEMUXER) += mlvdec.o riffdec.o
OBJS-$(CONFIG_MM_DEMUXER) += mm.o
OBJS-$(CONFIG_MMF_DEMUXER) += mmf.o
OBJS-$(CONFIG_MMF_MUXER) += mmf.o rawenc.o
OBJS-$(CONFIG_MODS_DEMUXER) += mods.o
OBJS-$(CONFIG_MOFLEX_DEMUXER) += moflex.o
OBJS-$(CONFIG_MOV_DEMUXER) += mov.o mov_chan.o mov_esds.o replaygain.o
OBJS-$(CONFIG_MOV_MUXER) += movenc.o av1.o avc.o hevc.o vpcc.o \

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@ -249,6 +249,7 @@ extern AVInputFormat ff_mlv_demuxer;
extern AVInputFormat ff_mm_demuxer;
extern AVInputFormat ff_mmf_demuxer;
extern AVOutputFormat ff_mmf_muxer;
extern AVInputFormat ff_mods_demuxer;
extern AVInputFormat ff_moflex_demuxer;
extern AVInputFormat ff_mov_demuxer;
extern AVOutputFormat ff_mov_muxer;

100
libavformat/mods.c Normal file
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@ -0,0 +1,100 @@
/*
* 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,
};

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@ -32,7 +32,7 @@
// Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 58
#define LIBAVFORMAT_VERSION_MINOR 52
#define LIBAVFORMAT_VERSION_MINOR 53
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \