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-rw-r--r--libavformat/epafdec.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/libavformat/epafdec.c b/libavformat/epafdec.c
new file mode 100644
index 0000000000..ffb8b95ec4
--- /dev/null
+++ b/libavformat/epafdec.c
@@ -0,0 +1,104 @@
+/*
+ * Ensoniq Paris Audio File demuxer
+ * Copyright (c) 2012 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"
+#include "pcm.h"
+
+static int epaf_probe(AVProbeData *p)
+{
+ if (((AV_RL32(p->buf) == MKTAG('f','a','p',' ') &&
+ AV_RL32(p->buf + 8) == 1) ||
+ (AV_RL32(p->buf) == MKTAG(' ','p','a','f') &&
+ AV_RN32(p->buf + 8) == 0)) &&
+ !AV_RN32(p->buf + 4) && AV_RN32(p->buf + 12) &&
+ AV_RN32(p->buf + 20))
+ return AVPROBE_SCORE_MAX / 4 * 3;
+ return 0;
+}
+
+static int epaf_read_header(AVFormatContext *s)
+{
+ int le, sample_rate, codec, channels;
+ AVStream *st;
+
+ avio_skip(s->pb, 4);
+ if (avio_rl32(s->pb))
+ return AVERROR_INVALIDDATA;
+
+ le = avio_rl32(s->pb);
+ if (le && le != 1)
+ return AVERROR_INVALIDDATA;
+
+ if (le) {
+ sample_rate = avio_rl32(s->pb);
+ codec = avio_rl32(s->pb);
+ channels = avio_rl32(s->pb);
+ } else {
+ sample_rate = avio_rb32(s->pb);
+ codec = avio_rb32(s->pb);
+ channels = avio_rb32(s->pb);
+ }
+
+ if (!channels || !sample_rate)
+ return AVERROR_INVALIDDATA;
+
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->channels = channels;
+ st->codec->sample_rate = sample_rate;
+ switch (codec) {
+ case 0:
+ st->codec->codec_id = le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE;
+ break;
+ case 2:
+ st->codec->codec_id = AV_CODEC_ID_PCM_S8;
+ break;
+ case 1:
+ av_log_missing_feature(s, "24-bit Paris PCM format", 1);
+ default:
+ return AVERROR_INVALIDDATA;
+ }
+
+ st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
+ st->codec->block_align = st->codec->bits_per_coded_sample * st->codec->channels / 8;
+
+ avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
+
+ if (avio_skip(s->pb, 2024) < 0)
+ return AVERROR_INVALIDDATA;
+ return 0;
+}
+
+AVInputFormat ff_epaf_demuxer = {
+ .name = "epaf",
+ .long_name = NULL_IF_CONFIG_SMALL("Ensoniq Paris Audio File"),
+ .read_probe = epaf_probe,
+ .read_header = epaf_read_header,
+ .read_packet = ff_pcm_read_packet,
+ .read_seek = ff_pcm_read_seek,
+ .extensions = "paf,fap",
+ .flags = AVFMT_GENERIC_INDEX,
+};