IRCAM demuxer & muxer

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

1 files changed, 61 insertions, 0 deletions

diff --git a/libavformat/ircamenc.c b/libavformat/ircamenc.c
new file mode 100644
index 0000000000..d33a062387
--- /dev/null
+++ b/libavformat/ircamenc.c
@@ -0,0 +1,61 @@
+/*
+ * IRCAM muxer
+ * 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 "rawenc.h"
+#include "ircam.h"
+
+static int ircam_write_header(AVFormatContext *s)
+{
+    AVCodecContext *codec = s->streams[0]->codec;
+    uint32_t tag;
+
+    if (s->nb_streams != 1) {
+        av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
+        return AVERROR(EINVAL);
+    }
+
+    tag = ff_codec_get_tag(ff_codec_ircam_le_tags, codec->codec_id);
+    if (!tag) {
+        av_log(s, AV_LOG_ERROR, "unsupported codec\n");
+        return AVERROR(EINVAL);
+    }
+
+    avio_wl32(s->pb, 0x0001A364);
+    avio_wl32(s->pb, av_float2int(codec->sample_rate));
+    avio_wl32(s->pb, codec->channels);
+    avio_wl32(s->pb, tag);
+    avio_skip(s->pb, 1008);
+    return 0;
+}
+
+AVOutputFormat ff_ircam_muxer = {
+    .name           = "ircam",
+    .extensions     = "sf,ircam",
+    .long_name      = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"),
+    .audio_codec    = AV_CODEC_ID_PCM_S16LE,
+    .video_codec    = AV_CODEC_ID_NONE,
+    .write_header   = ircam_write_header,
+    .write_packet   = ff_raw_write_packet,
+    .codec_tag      = (const AVCodecTag *const []){ ff_codec_ircam_le_tags, 0 },
+};