1 files changed, 80 insertions, 0 deletions
diff --git a/lib/edioutput/TagPacket.cpp b/lib/edioutput/TagPacket.cpp
new file mode 100644
index 0000000..ec52ad7
--- /dev/null
+++ b/lib/edioutput/TagPacket.cpp
@@ -0,0 +1,80 @@
+/*
+   Copyright (C) 2020
+   Matthias P. Braendli, matthias.braendli@mpb.li
+
+    http://www.opendigitalradio.org
+
+   EDI output.
+    This defines a TAG Packet.
+   */
+/*
+   This file is part of the ODR-mmbTools.
+
+   This program 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.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+#include "TagPacket.h"
+#include "TagItems.h"
+#include <vector>
+#include <iostream>
+#include <string>
+#include <list>
+#include <cstdint>
+#include <cassert>
+
+namespace edi {
+
+TagPacket::TagPacket(unsigned int alignment) : m_alignment(alignment)
+{ }
+
+std::vector<uint8_t> TagPacket::Assemble()
+{
+    if (raw_tagpacket.size() > 0 and tag_items.size() > 0) {
+        throw std::logic_error("TagPacket: both raw and items used!");
+    }
+
+    if (raw_tagpacket.size() > 0) {
+        return raw_tagpacket;
+    }
+
+    std::vector<uint8_t> packet;
+
+    for (auto tag : tag_items) {
+        std::vector<uint8_t> tag_data = tag->Assemble();
+        packet.insert(packet.end(), tag_data.begin(), tag_data.end());
+    }
+
+    if (m_alignment == 0) { /* no padding */ }
+    else if (m_alignment == 8) {
+        // Add padding inside TAG packet
+        while (packet.size() % 8 > 0) {
+            packet.push_back(0); // TS 102 821, 5.1, "padding shall be undefined"
+        }
+    }
+    else if (m_alignment > 8) {
+        TagStarDMY dmy(m_alignment - 8);
+        auto dmy_data = dmy.Assemble();
+        packet.insert(packet.end(), dmy_data.begin(), dmy_data.end());
+    }
+    else {
+        std::cerr << "Invalid alignment requirement " << m_alignment <<
+            " defined in TagPacket" << std::endl;
+    }
+
+    return packet;
+}
+
+}
+