[FFmpeg-devel] [PATCH] avformat: add wve demuxer

[Paul B Mahol]

Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
 libavformat/Makefile     |  1 +
 libavformat/allformats.c |  1 +
 libavformat/wvedec.c     | 62 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 64 insertions(+)
 create mode 100644 libavformat/wvedec.c

diff --git a/libavformat/Makefile b/libavformat/Makefile
index 7886b05..de77634 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -481,6 +481,7 @@ OBJS-$(CONFIG_WTV_DEMUXER)               += wtvdec.o wtv_common.o asf.o \
 OBJS-$(CONFIG_WTV_MUXER)                 += wtvenc.o wtv_common.o \
                                             mpegtsenc.o asf.o
 OBJS-$(CONFIG_WV_DEMUXER)                += wvdec.o wv.o apetag.o img2.o
+OBJS-$(CONFIG_WVE_DEMUXER)               += wvedec.o pcm.o
 OBJS-$(CONFIG_WV_MUXER)                  += wvenc.o wv.o apetag.o img2.o
 OBJS-$(CONFIG_XA_DEMUXER)                += xa.o
 OBJS-$(CONFIG_XBIN_DEMUXER)              += bintext.o sauce.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index f238118..5f691ef 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -331,6 +331,7 @@ void av_register_all(void)
     REGISTER_DEMUXER (WSAUD,            wsaud);
     REGISTER_DEMUXER (WSVQA,            wsvqa);
     REGISTER_MUXDEMUX(WTV,              wtv);
+    REGISTER_DEMUXER (WVE,              wve);
     REGISTER_MUXDEMUX(WV,               wv);
     REGISTER_DEMUXER (XA,               xa);
     REGISTER_DEMUXER (XBIN,             xbin);
diff --git a/libavformat/wvedec.c b/libavformat/wvedec.c
new file mode 100644
index 0000000..8e74abe
--- /dev/null
+++ b/libavformat/wvedec.c
@@ -0,0 +1,62 @@
+/*
+ * 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 "avformat.h"
+#include "internal.h"
+#include "pcm.h"
+
+static int wve_probe(AVProbeData *p)
+{
+    if (memcmp(p->buf, "ALawSoundFile**\0\017\020", 18) ||
+        memcmp(p->buf + 22, "\0\0\0\1\0\0\0\0\0\0", 10))
+        return 0;
+    return AVPROBE_SCORE_MAX;
+}
+
+static int wve_read_header(AVFormatContext *s)
+{
+    AVStream *st;
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    avio_skip(s->pb, 18);
+    st->duration           = avio_rb32(s->pb);
+    st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
+    st->codec->codec_id    = AV_CODEC_ID_PCM_ALAW;
+    st->codec->sample_rate = 8000;
+    st->codec->channels    = 1;
+    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);
+    avio_skip(s->pb, 10);
+
+    return 0;
+}
+
+AVInputFormat ff_wve_demuxer = {
+    .name           = "wve",
+    .long_name      = NULL_IF_CONFIG_SMALL("Psion 3 audio"),
+    .read_probe     = wve_probe,
+    .read_header    = wve_read_header,
+    .read_packet    = ff_pcm_read_packet,
+    .read_seek      = ff_pcm_read_seek,
+};
-- 
1.9.1