From 47033e0ba1377cee310490587b87490249d9b510 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Sat, 1 Aug 2015 11:03:38 +0200
Subject: Add option to pad TAGPacket in different ways

---
 src/dabOutput/edi/TagPacket.cpp | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

(limited to 'src/dabOutput/edi/TagPacket.cpp')

diff --git a/src/dabOutput/edi/TagPacket.cpp b/src/dabOutput/edi/TagPacket.cpp
index aa4f23b..435c071 100644
--- a/src/dabOutput/edi/TagPacket.cpp
+++ b/src/dabOutput/edi/TagPacket.cpp
@@ -33,6 +33,8 @@
 #include <stdint.h>
 #include <cassert>
 
+TagPacket::TagPacket(unsigned int alignment) : m_alignment(alignment)
+{ }
 
 std::vector<uint8_t> TagPacket::Assemble()
 {
@@ -49,10 +51,21 @@ std::vector<uint8_t> TagPacket::Assemble()
         //std::cerr << "     Add TAGItem of length " << tag_data.size() << std::endl;
     }
 
-    // Add padding
-    while (packet.size() % 8 > 0)
-    {
-        packet.push_back(0); // TS 102 821, 5.1, "padding shall be undefined"
+    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;
-- 
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