From 4da4bfcdc9008e1794cbc627c7acfde06ee48237 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Sun, 15 May 2016 20:35:14 +0200 Subject: avformat: add MTAF demuxer Signed-off-by: Paul B Mahol --- libavformat/mtaf.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 libavformat/mtaf.c (limited to 'libavformat/mtaf.c') diff --git a/libavformat/mtaf.c b/libavformat/mtaf.c new file mode 100644 index 0000000000..b25c2aa402 --- /dev/null +++ b/libavformat/mtaf.c @@ -0,0 +1,81 @@ +/* + * 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", +}; -- cgit v1.2.3