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.
71 lines
2.0 KiB
71 lines
2.0 KiB
/* |
|
* RAW Ingenient MJPEG demuxer |
|
* Copyright (c) 2005 Alex Beregszaszi |
|
* |
|
* This file is part of Libav. |
|
* |
|
* Libav 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. |
|
* |
|
* Libav 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 Libav; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "avformat.h" |
|
#include "rawdec.h" |
|
|
|
// http://www.artificis.hu/files/texts/ingenient.txt |
|
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); |
|
|
|
if (av_new_packet(pkt, size) < 0) |
|
return AVERROR(ENOMEM); |
|
|
|
pkt->pos = avio_tell(s->pb); |
|
pkt->stream_index = 0; |
|
ret = avio_read(s->pb, pkt->data, size); |
|
if (ret < 0) { |
|
av_free_packet(pkt); |
|
return ret; |
|
} |
|
pkt->size = ret; |
|
return ret; |
|
} |
|
|
|
AVInputFormat ff_ingenient_demuxer = { |
|
"ingenient", |
|
NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"), |
|
0, |
|
NULL, |
|
ff_raw_video_read_header, |
|
ingenient_read_packet, |
|
.flags= AVFMT_GENERIC_INDEX, |
|
.extensions = "cgi", // FIXME |
|
.value = CODEC_ID_MJPEG, |
|
};
|
|
|