Add edi time and utco as ZMQ metadata

Since ODR-DabMod doesn't check the zmq message length, it will accept
additional metadata at the end of the ETI data

1 files changed, 70 insertions, 0 deletions

diff --git a/src/dabOutput/metadata.cpp b/src/dabOutput/metadata.cpp
new file mode 100644
index 0000000..6dfd65c
--- /dev/null
+++ b/src/dabOutput/metadata.cpp
@@ -0,0 +1,70 @@
+/*
+   Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in
+   Right of Canada (Communications Research Center Canada)
+
+   Copyright (C) 2017
+   Matthias P. Braendli, matthias.braendli@mpb.li
+
+    http://www.opendigitalradio.org
+
+   The metadata support for the outputs.
+*/
+/*
+   This file is part of ODR-DabMux.
+
+   ODR-DabMux is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the
+   License, or (at your option) any later version.
+
+   ODR-DabMux 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with ODR-DabMux.  If not, see <http://www.gnu.org/licenses/>.
+   */
+
+#include "dabOutput/metadata.h"
+#include <cstring>
+#include <arpa/inet.h>
+
+#ifdef HAVE_CONFIG_H
+#   include "config.h"
+#endif
+
+template <typename T>
+size_t write_meta(output_metadata_id_e md, uint8_t *buf, T value)
+{
+    buf[0] = static_cast<uint8_t>(md);
+
+    const int16_t len_value = sizeof(T);
+
+    const uint16_t data_length = htons(len_value);
+    memcpy(buf + 1, &data_length, sizeof(data_length));
+
+    if (len_value == 1) {
+        buf[3] = value;
+    }
+    else if (len_value == 2) {
+        const uint16_t value = htons(value);
+        memcpy(buf + 3, &value, sizeof(value));
+    }
+    else if (len_value == 4) {
+        const uint32_t value = htons(value);
+        memcpy(buf + 3, &value, sizeof(value));
+    }
+
+    return 3 + len_value;
+}
+
+size_t OutputMetadataUTCO::write(uint8_t *buf)
+{
+    return write_meta(getId(), buf, utco);
+}
+
+size_t OutputMetadataEDITime::write(uint8_t *buf)
+{
+    return write_meta(getId(), buf, seconds);
+}