avformat: add MTAF demuxer

Signed-off-by: Paul B Mahol <onemda@gmail.com>

1 files changed, 81 insertions, 0 deletions

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",
+};