--- /dev/null
+/*
+ * MSF demuxer
+ * Copyright (c) 2015 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/intreadwrite.h"
+#include "avformat.h"
+#include "internal.h"
+
+static int msf_probe(AVProbeData *p)
+{
+ if (memcmp(p->buf, "MSF", 3))
+ return 0;
+
+ if (AV_RB32(p->buf+8) <= 0)
+ return 0;
+
+ if (AV_RB32(p->buf+16) <= 0)
+ return 0;
+
+ return AVPROBE_SCORE_MAX / 3 * 2;
+}
+
+static int msf_read_header(AVFormatContext *s)
+{
+ unsigned codec, align, size;
+ AVStream *st;
+
+ avio_skip(s->pb, 4);
+
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ codec = avio_rb32(s->pb);
+ st->codec->channels = avio_rb32(s->pb);
+ if (st->codec->channels <= 0)
+ return AVERROR_INVALIDDATA;
+ size = avio_rb32(s->pb);
+ st->codec->sample_rate = avio_rb32(s->pb);
+ if (st->codec->sample_rate <= 0)
+ return AVERROR_INVALIDDATA;
+ align = avio_rb32(s->pb) ;
+ if (align > INT_MAX / st->codec->channels)
+ return AVERROR_INVALIDDATA;
+ st->codec->block_align = align;
+ switch (codec) {
+ case 0: st->codec->codec_id = AV_CODEC_ID_PCM_S16BE; break;
+ case 3: st->codec->block_align = 16 * st->codec->channels;
+ st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; break;
+ case 7: st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
+ st->codec->codec_id = AV_CODEC_ID_MP3; break;
+ default:
+ avpriv_request_sample(s, "Codec %d", codec);
+ return AVERROR_PATCHWELCOME;
+ }
+ st->duration = av_get_audio_frame_duration(st->codec, size);
+ avio_skip(s->pb, 0x40 - avio_tell(s->pb));
+ avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
+
+ return 0;
+}
+
+static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ AVCodecContext *codec = s->streams[0]->codec;
+
+ return av_get_packet(s->pb, pkt, codec->block_align ? codec->block_align : 1024 * codec->channels);
+}
+
+AVInputFormat ff_msf_demuxer = {
+ .name = "msf",
+ .long_name = NULL_IF_CONFIG_SMALL("MSF"),
+ .read_probe = msf_probe,
+ .read_header = msf_read_header,
+ .read_packet = msf_read_packet,
+ .extensions = "msf",
+};