--- /dev/null
+/*
+ * VAG 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/channel_layout.h"
+#include "avformat.h"
+#include "internal.h"
+
+typedef struct VAGDemuxContext {
+ int64_t data_end;
+} VAGDemuxContext;
+
+static int vag_probe(AVProbeData *p)
+{
+ if (memcmp(p->buf, "VAGp\0\0\0", 7))
+ return 0;
+
+ return AVPROBE_SCORE_MAX;
+}
+
+static int vag_read_header(AVFormatContext *s)
+{
+ VAGDemuxContext *c = s->priv_data;
+ AVStream *st;
+
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ avio_skip(s->pb, 4);
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX;
+ st->codec->channels = 1 + (avio_rb32(s->pb) == 0x00000004);
+ avio_skip(s->pb, 4);
+ c->data_end = avio_rb32(s->pb);
+ st->duration = (c->data_end - avio_tell(s->pb)) / (16 * st->codec->channels) * 28;
+ st->codec->sample_rate = avio_rb32(s->pb);
+ if (st->codec->sample_rate <= 0)
+ return AVERROR_INVALIDDATA;
+ st->codec->block_align = 16 * st->codec->channels;
+ avio_skip(s->pb, 28);
+ avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
+
+ return 0;
+}
+
+static int vag_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ VAGDemuxContext *c = s->priv_data;
+ AVCodecContext *codec = s->streams[0]->codec;
+ int size;
+
+ size = FFMIN(c->data_end - avio_tell(s->pb), codec->block_align);
+ if (size <= 0)
+ return AVERROR_EOF;
+
+ return av_get_packet(s->pb, pkt, size);
+}
+
+AVInputFormat ff_vag_demuxer = {
+ .name = "vag",
+ .long_name = NULL_IF_CONFIG_SMALL("Sony VAG"),
+ .priv_data_size = sizeof(VAGDemuxContext),
+ .read_probe = vag_probe,
+ .read_header = vag_read_header,
+ .read_packet = vag_read_packet,
+ .extensions = "vag",
+};