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/*
* XMD 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 xmd_probe(const AVProbeData *p)
{
if ((AV_RL32(p->buf) & 0xFFFFFF) != MKTAG('x','m','d',0))
return 0;
if (p->buf[3] == 0 || p->buf[3] > 2 ||
AV_RL16(p->buf+4) == 0 ||
AV_RL32(p->buf+6) == 0)
return 0;
return AVPROBE_SCORE_MAX / 3;
}
static int xmd_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
AVCodecParameters *par;
int channels;
AVStream *st;
avio_skip(pb, 3);
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_XMD;
channels = avio_r8(pb);
if (channels == 0)
return AVERROR_INVALIDDATA;
av_channel_layout_default(&par->ch_layout, channels);
par->sample_rate = avio_rl16(pb);
if (par->sample_rate <= 0)
return AVERROR_INVALIDDATA;
par->block_align = 21 * channels;
st->duration = (avio_rl32(pb) / par->block_align) * 32LL;
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
avio_skip(pb, 7);
return 0;
}
const AVInputFormat ff_xmd_demuxer = {
.name = "xmd",
.long_name = NULL_IF_CONFIG_SMALL("Konami XMD"),
.read_probe = xmd_probe,
.read_header = xmd_read_header,
.read_packet = ff_pcm_read_packet,
.flags = AVFMT_GENERIC_INDEX,
.extensions = "xmd",
};
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