mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
b800327f4c
This commit does for AVInputFormat what commit59c9dc82f4did for AVOutputFormat: It adds a new type FFInputFormat, moves all the internals of AVInputFormat to it and adds a now reduced AVInputFormat as first member. This does not affect/improve extensibility of both public or private fields for demuxers (it is still a mess due to lavd). This is possible since50f34172e0(which removed the last usage of an internal field of AVInputFormat in fftools). (Hint: tools/probetest.c accesses the internals of FFInputFormat as well, but given that it is a testing tool this is not considered a problem.) Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*
|
|
* RAW Ingenient MJPEG demuxer
|
|
* Copyright (c) 2005 Alex Beregszaszi
|
|
*
|
|
* 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 "demux.h"
|
|
#include "rawdec.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
|
|
// http://multimedia.cx/ingenient.txt
|
|
static int ingenient_probe(const AVProbeData *p)
|
|
{
|
|
if ( AV_RN32(p->buf) != AV_RN32("MJPG")
|
|
|| p->buf_size < 50
|
|
|| AV_RB16(p->buf + 48) != 0xffd8)
|
|
return 0;
|
|
return AVPROBE_SCORE_MAX * 3 / 4;
|
|
}
|
|
|
|
static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int ret, size, w, h, unk1, unk2;
|
|
|
|
if (avio_rl32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
|
|
return AVERROR(EIO); // FIXME
|
|
|
|
size = avio_rl32(s->pb);
|
|
|
|
w = avio_rl16(s->pb);
|
|
h = avio_rl16(s->pb);
|
|
|
|
avio_skip(s->pb, 8); // zero + size (padded?)
|
|
avio_skip(s->pb, 2);
|
|
unk1 = avio_rl16(s->pb);
|
|
unk2 = avio_rl16(s->pb);
|
|
avio_skip(s->pb, 22); // ASCII timestamp
|
|
|
|
av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
|
|
size, w, h, unk1, unk2);
|
|
|
|
ret = av_get_packet(s->pb, pkt, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
pkt->stream_index = 0;
|
|
return ret;
|
|
}
|
|
|
|
const FFInputFormat ff_ingenient_demuxer = {
|
|
.p.name = "ingenient",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),
|
|
.p.flags = AVFMT_GENERIC_INDEX,
|
|
.p.extensions = "cgi", // FIXME
|
|
.p.priv_class = &ff_rawvideo_demuxer_class,
|
|
.priv_data_size = sizeof(FFRawVideoDemuxerContext),
|
|
.read_probe = ingenient_probe,
|
|
.read_header = ff_raw_video_read_header,
|
|
.read_packet = ingenient_read_packet,
|
|
.raw_codec_id = AV_CODEC_ID_MJPEG,
|
|
};
|