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/*
* MTAF 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/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "internal.h"
static int mtaf_probe(AVProbeData *p)
{
if (p->buf_size < 0x44)
return 0;
if (AV_RL32(p->buf) != MKTAG('M','T','A','F') ||
AV_RL32(p->buf + 0x40) != MKTAG('H','E','A','D'))
return 0;
return AVPROBE_SCORE_MAX;
}
static int mtaf_read_header(AVFormatContext *s)
{
int stream_count;
AVStream *st;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avio_skip(s->pb, 0x5c);
st->duration = avio_rl32(s->pb);
avio_skip(s->pb, 1);
stream_count = avio_r8(s->pb);
if (!stream_count)
return AVERROR_INVALIDDATA;
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_MTAF;
st->codecpar->channels = 2 * stream_count;
st->codecpar->sample_rate = 48000;
st->codecpar->block_align = 0x110 * st->codecpar->channels / 2;
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
avio_seek(s->pb, 0x800, SEEK_SET);
return 0;
}
static int mtaf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVCodecParameters *par = s->streams[0]->codecpar;
return av_get_packet(s->pb, pkt, par->block_align);
}
AVInputFormat ff_mtaf_demuxer = {
.name = "mtaf",
.long_name = NULL_IF_CONFIG_SMALL("Konami PS2 MTAF"),
.read_probe = mtaf_probe,
.read_header = mtaf_read_header,
.read_packet = mtaf_read_packet,
.extensions = "mtaf",
};
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