mirror of https://git.ffmpeg.org/ffmpeg.git
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
|
/*
|
||
|
|
* Bonk demuxer
|
||
|
|
* Copyright (c) 2016 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 "demux.h"
|
||
|
|
#include "internal.h"
|
||
|
|
#include "rawdec.h"
|
||
|
|
|
||
|
|
static int bonk_probe(const AVProbeData *p)
|
||
|
|
{
|
||
|
|
for (int i = 0; i < p->buf_size - 22; i++) {
|
||
|
|
if (!p->buf[i] && AV_RL32(p->buf + i + 1) == MKTAG('B','O','N','K')) {
|
||
|
|
if (p->buf[i + 5])
|
||
|
|
return 0;
|
||
|
|
if (AV_RL32(p->buf + i + 6) == 0)
|
||
|
|
return 0;
|
||
|
|
if (AV_RL32(p->buf + i + 10) == 0)
|
||
|
|
return 0;
|
||
|
|
if (p->buf[i + 14] == 0)
|
||
|
|
return 0;
|
||
|
|
if (AV_RL16(p->buf + i + 17) == 0 ||
|
||
|
|
AV_RL16(p->buf + i + 17) > 2048)
|
||
|
|
return 0;
|
||
|
|
if (p->buf[i + 19] == 0)
|
||
|
|
return 0;
|
||
|
|
if (AV_RL16(p->buf + i + 20) == 0)
|
||
|
|
return 0;
|
||
|
|
return AVPROBE_SCORE_MAX;
|
||
|
|
} else if (!p->buf[i]) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bonk_read_header(AVFormatContext *s)
|
||
|
|
{
|
||
|
|
AVStream *st;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
for (int i = 0; !avio_feof(s->pb); i++) {
|
||
|
|
int b = avio_r8(s->pb);
|
||
|
|
if (!b && avio_rl32(s->pb) == MKTAG('B','O','N','K'))
|
||
|
|
break;
|
||
|
|
else if (!b)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
st = avformat_new_stream(s, NULL);
|
||
|
|
if (!st)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
if ((ret = ff_get_extradata(s, st->codecpar, s->pb, 17)) < 0)
|
||
|
|
return ret;
|
||
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
||
|
|
st->codecpar->codec_id = AV_CODEC_ID_BONK;
|
||
|
|
st->codecpar->sample_rate = AV_RL32(st->codecpar->extradata + 5);
|
||
|
|
st->codecpar->ch_layout.nb_channels = st->codecpar->extradata[9];
|
||
|
|
if (st->codecpar->ch_layout.nb_channels == 0)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
st->duration = AV_RL32(st->codecpar->extradata + 1) / st->codecpar->ch_layout.nb_channels;
|
||
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
const AVInputFormat ff_bonk_demuxer = {
|
||
|
|
.name = "bonk",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("raw Bonk"),
|
||
|
|
.read_probe = bonk_probe,
|
||
|
|
.read_header = bonk_read_header,
|
||
|
|
.read_packet = ff_raw_read_partial_packet,
|
||
|
|
.extensions = "bonk",
|
||
|
|
.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS,
|
||
|
|
.raw_codec_id = AV_CODEC_ID_BONK,
|
||
|
|
.priv_data_size = sizeof(FFRawDemuxerContext),
|
||
|
|
.priv_class = &ff_raw_demuxer_class,
|
||
|
|
};
|