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/*
* FWSE demuxer
* Copyright (c) 2020 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 "internal.h"
#include "pcm.h"
static int fwse_probe(const AVProbeData *p)
{
if (AV_RL32(p->buf) != MKTAG('F','W','S','E'))
return 0;
if (AV_RL32(p->buf+4) != 2 && AV_RL32(p->buf+4) != 3)
return 0;
if (AV_RL32(p->buf+16) != 1 && AV_RL32(p->buf+16) != 2)
return 0;
return AVPROBE_SCORE_MAX / 4 * 3;
}
static int fwse_read_header(AVFormatContext *s)
{
unsigned start_offset, version;
AVIOContext *pb = s->pb;
AVCodecParameters *par;
AVStream *st;
avio_skip(pb, 4);
version = avio_rl32(pb);
if (version != 2 && version != 3)
return AVERROR_INVALIDDATA;
avio_skip(pb, 4);
start_offset = avio_rl32(pb);
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
par = st->codecpar;
par->codec_type = AVMEDIA_TYPE_AUDIO;
par->codec_id = AV_CODEC_ID_ADPCM_IMA_MTF;
par->format = AV_SAMPLE_FMT_S16;
par->channels = avio_rl32(pb);
if (par->channels != 1 && par->channels != 2)
return AVERROR_INVALIDDATA;
if (par->channels == 1)
par->channel_layout = AV_CH_LAYOUT_MONO;
else if (par->channels == 2)
par->channel_layout = AV_CH_LAYOUT_STEREO;
st->duration = avio_rl32(pb);
par->sample_rate = avio_rl32(pb);
if (par->sample_rate <= 0 || par->sample_rate > INT_MAX)
return AVERROR_INVALIDDATA;
par->block_align = 1;
avio_skip(pb, start_offset - avio_tell(pb));
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
return 0;
}
const AVInputFormat ff_fwse_demuxer = {
.name = "fwse",
.long_name = NULL_IF_CONFIG_SMALL("Capcom's MT Framework sound"),
.read_probe = fwse_probe,
.read_header = fwse_read_header,
.read_packet = ff_pcm_read_packet,
.extensions = "fwse",
};
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