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.
88 lines
2.5 KiB
88 lines
2.5 KiB
2 years ago
|
/*
|
||
|
|
* WADY demuxer
|
||
|
|
* Copyright (c) 2023 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/channel_layout.h"
|
||
|
|
#include "libavutil/intreadwrite.h"
|
||
|
|
#include "avformat.h"
|
||
|
|
#include "demux.h"
|
||
|
|
#include "internal.h"
|
||
|
|
#include "pcm.h"
|
||
|
|
|
||
|
|
static int wady_probe(const AVProbeData *p)
|
||
|
|
{
|
||
|
|
if (AV_RL32(p->buf) != MKTAG('W','A','D','Y'))
|
||
|
|
return 0;
|
||
|
|
if (p->buf[4] != 0 || p->buf[5] == 0 ||
|
||
|
|
AV_RL16(p->buf+6) == 0 ||
|
||
|
|
AV_RL32(p->buf+8) == 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return AVPROBE_SCORE_MAX / 3 * 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int wady_read_header(AVFormatContext *s)
|
||
|
|
{
|
||
|
|
AVIOContext *pb = s->pb;
|
||
|
|
AVCodecParameters *par;
|
||
|
|
int channels, ret;
|
||
|
|
AVStream *st;
|
||
|
|
|
||
|
|
avio_skip(pb, 4);
|
||
|
|
|
||
|
|
st = avformat_new_stream(s, NULL);
|
||
|
|
if (!st)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
|
||
|
|
avio_skip(pb, 1);
|
||
|
|
par = st->codecpar;
|
||
|
|
par->codec_type = AVMEDIA_TYPE_AUDIO;
|
||
|
|
par->codec_id = AV_CODEC_ID_WADY_DPCM;
|
||
|
|
par->format = AV_SAMPLE_FMT_S16;
|
||
|
|
if ((ret = ff_get_extradata(s, par, pb, 1)) < 0)
|
||
|
|
return ret;
|
||
|
|
channels = avio_rl16(pb);
|
||
|
|
if (channels == 0)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
av_channel_layout_default(&par->ch_layout, channels);
|
||
|
|
par->sample_rate = avio_rl32(pb);
|
||
|
|
if (par->sample_rate <= 0)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
avio_skip(pb, 4);
|
||
|
|
st->duration = avio_rl32(pb);
|
||
|
|
par->block_align = channels;
|
||
|
|
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
|
||
|
|
|
||
|
|
avio_seek(pb, 0x30, SEEK_SET);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
const AVInputFormat ff_wady_demuxer = {
|
||
|
|
.name = "wady",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("Marble WADY"),
|
||
|
|
.read_probe = wady_probe,
|
||
|
|
.read_header = wady_read_header,
|
||
|
|
.read_packet = ff_pcm_read_packet,
|
||
|
|
.read_seek = ff_pcm_read_seek,
|
||
|
|
.flags = AVFMT_GENERIC_INDEX,
|
||
|
|
.extensions = "way",
|
||
|
|
};
|