3 * Copyright (c) 2016 Paul B Mahol
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/channel_layout.h"
23 #include "libavutil/intreadwrite.h"
27 static int mtaf_probe(AVProbeData *p)
29 if (p->buf_size < 0x44)
32 if (AV_RL32(p->buf) != MKTAG('M','T','A','F') ||
33 AV_RL32(p->buf + 0x40) != MKTAG('H','E','A','D'))
36 return AVPROBE_SCORE_MAX;
39 static int mtaf_read_header(AVFormatContext *s)
44 st = avformat_new_stream(s, NULL);
46 return AVERROR(ENOMEM);
48 avio_skip(s->pb, 0x5c);
49 st->duration = avio_rl32(s->pb);
51 stream_count = avio_r8(s->pb);
53 return AVERROR_INVALIDDATA;
55 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
56 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_MTAF;
57 st->codecpar->channels = 2 * stream_count;
58 st->codecpar->sample_rate = 48000;
59 st->codecpar->block_align = 0x110 * st->codecpar->channels / 2;
60 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
62 avio_seek(s->pb, 0x800, SEEK_SET);
67 static int mtaf_read_packet(AVFormatContext *s, AVPacket *pkt)
69 AVCodecParameters *par = s->streams[0]->codecpar;
71 return av_get_packet(s->pb, pkt, par->block_align);
74 AVInputFormat ff_mtaf_demuxer = {
76 .long_name = NULL_IF_CONFIG_SMALL("Konami PS2 MTAF"),
77 .read_probe = mtaf_probe,
78 .read_header = mtaf_read_header,
79 .read_packet = mtaf_read_packet,