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/*
* 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_RL16(p->buf+6) > 2 ||
(int32_t)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 FFInputFormat ff_wady_demuxer = {
.p.name = "wady",
.p.long_name = NULL_IF_CONFIG_SMALL("Marble WADY"),
.p.flags = AVFMT_GENERIC_INDEX,
.p.extensions = "way",
.read_probe = wady_probe,
.read_header = wady_read_header,
.read_packet = ff_pcm_read_packet,
.read_seek = ff_pcm_read_seek,
};
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