Ensoniq Paris Audio File demuxer

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

Changelog

@@ -35,6 +35,7 @@ version <next>:
 - PVF demuxer
 - subtitles filter
 - IRCAM muxer/demuxer
+- Paris Audio File demuxer
 
 
 version 1.0:

doc/general.texi

@@ -201,6 +201,7 @@ library:
 @item Electronic Arts cdata  @tab    @tab X
 @item Electronic Arts Multimedia  @tab    @tab X
     @tab Used in various EA games; files have extensions like WVE and UV2.
+@item Ensoniq Paris Audio File  @tab   @tab X
 @item FFM (FFserver live feed)  @tab X @tab X
 @item Flash (SWF)               @tab X @tab X
 @item Flash 9 (AVM2)            @tab X @tab X

libavformat/Makefile

@@ -115,6 +115,7 @@ OBJS-$(CONFIG_EA_CDATA_DEMUXER)          += eacdata.o
 OBJS-$(CONFIG_EA_DEMUXER)                += electronicarts.o
 OBJS-$(CONFIG_EAC3_DEMUXER)              += ac3dec.o rawdec.o
 OBJS-$(CONFIG_EAC3_MUXER)                += rawenc.o
+OBJS-$(CONFIG_EPAF_DEMUXER)              += epafdec.o pcm.o
 OBJS-$(CONFIG_FFM_DEMUXER)               += ffmdec.o
 OBJS-$(CONFIG_FFM_MUXER)                 += ffmenc.o
 OBJS-$(CONFIG_FFMETADATA_DEMUXER)        += ffmetadec.o

libavformat/allformats.c

@@ -98,6 +98,7 @@ void av_register_all(void)
     REGISTER_DEMUXER  (EA, ea);
     REGISTER_DEMUXER  (EA_CDATA, ea_cdata);
     REGISTER_MUXDEMUX (EAC3, eac3);
+    REGISTER_DEMUXER  (EPAF, epaf);
     REGISTER_MUXER    (F4V, f4v);
     REGISTER_MUXDEMUX (FFM, ffm);
     REGISTER_MUXDEMUX (FFMETADATA, ffmetadata);

libavformat/epafdec.c

+/*
+ * 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,
+};

libavformat/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 45
+#define LIBAVFORMAT_VERSION_MINOR 46
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \