From d4797ace7fcee41d9c9cdf35a3cac54e4c0235db Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Mon, 26 Jan 2015 22:10:29 +0100
Subject: EDI: write transport header in PFT

---
 src/DabMux.cpp            |  2 +-
 src/DabMux.h              | 10 ----------
 src/dabOutput/dabOutput.h | 12 ++++++++++++
 src/dabOutput/edi/PFT.cpp | 35 +++++++++++++++++++++++++++++++----
 src/dabOutput/edi/PFT.h   | 10 +++++++---
 5 files changed, 51 insertions(+), 18 deletions(-)

(limited to 'src')

diff --git a/src/DabMux.cpp b/src/DabMux.cpp
index 376e33c..1597a9b 100644
--- a/src/DabMux.cpp
+++ b/src/DabMux.cpp
@@ -728,7 +728,7 @@ int main(int argc, char *argv[])
         AFPacketiser edi_afPacketiser(edi_conf.verbose);
 
         // The AF Packet will be protected with reed-solomon and split in fragments
-        PFT edi_pft(207, 3, edi_conf.verbose);
+        PFT edi_pft(207, 3, edi_conf);
 
         /*   Each iteration of the main loop creates one ETI frame */
         for (currentFrame = 0; running; currentFrame++) {
diff --git a/src/DabMux.h b/src/DabMux.h
index ed1855e..89868ac 100644
--- a/src/DabMux.h
+++ b/src/DabMux.h
@@ -66,16 +66,6 @@
 #define DEFAULT_SERVICE_ID      50
 #define DEFAULT_PACKET_ADDRESS  0
 
-struct edi_configuration_t {
-    bool enabled;
-    unsigned int source_port;
-    bool dump;
-    bool verbose;
-    bool enable_pft;
-    std::string dest_addr;
-    unsigned int dest_port;
-};
-
 /*****************************************************************************
  *****************   Definition of FIG structures ****************************
  *****************************************************************************/
diff --git a/src/dabOutput/dabOutput.h b/src/dabOutput/dabOutput.h
index 108fd3d..18f3848 100644
--- a/src/dabOutput/dabOutput.h
+++ b/src/dabOutput/dabOutput.h
@@ -53,6 +53,18 @@
 #  include "zmq.hpp"
 #endif
 
+// Configuration for EDI output
+struct edi_configuration_t {
+    bool enabled;
+    unsigned int source_port;
+    bool dump;
+    bool verbose;
+    bool enable_pft;
+    std::string dest_addr;
+    unsigned int dest_port;
+};
+
+
 // Abstract base class for all outputs
 class DabOutput
 {
diff --git a/src/dabOutput/edi/PFT.cpp b/src/dabOutput/edi/PFT.cpp
index 3352136..e1c8249 100644
--- a/src/dabOutput/edi/PFT.cpp
+++ b/src/dabOutput/edi/PFT.cpp
@@ -168,6 +168,9 @@ std::vector< PFTFragment > PFT::Assemble(AFPacket af_packet)
     vector< vector<uint8_t> > fragments = ProtectAndFragment(af_packet);
     vector< vector<uint8_t> > pft_fragments; // These contain PF headers
 
+    const bool enable_RS = true;
+    const bool enable_transport = true;
+
     unsigned int findex = 0;
 
     unsigned fcount = fragments.size();
@@ -184,29 +187,53 @@ std::vector< PFTFragment > PFT::Assemble(AFPacket af_packet)
     for (size_t i = 0; i < fragments.size(); i++) {
         const vector<uint8_t>& fragment = fragments[i];
 
-        std::string psync("PF"); // SYNC
+        // Psync
+        std::string psync("PF");
         std::vector<uint8_t> packet(psync.begin(), psync.end());
 
+        // Pseq
         packet.push_back(m_pseq >> 8);
         packet.push_back(m_pseq & 0xFF);
 
+        // Findex
         packet.push_back(findex >> 16);
         packet.push_back(findex >> 8);
         packet.push_back(findex & 0xFF);
         findex++;
 
+        // Fcount
         packet.push_back(fcount >> 16);
         packet.push_back(fcount >> 8);
         packet.push_back(fcount & 0xFF);
 
+        // RS (1 bit), transport (1 bit) and Plen (14 bits)
         unsigned int plen = fragment.size();
-        plen |= 0x8000; // Set FEC bit
+        if (enable_RS) {
+            plen |= 0x8000; // Set FEC bit
+        }
+
+        if (enable_transport) {
+            plen |= 0x4000; // Set ADDR bit
+        }
 
         packet.push_back(plen >> 8);
         packet.push_back(plen & 0xFF);
 
-        packet.push_back(chunk_len);   // RSk
-        packet.push_back(zero_pad);    // RSz
+        if (enable_RS) {
+            packet.push_back(chunk_len);   // RSk
+            packet.push_back(zero_pad);    // RSz
+        }
+
+        if (enable_transport) {
+            // Source (16 bits)
+            uint16_t addr_source = 0;
+            packet.push_back(addr_source >> 8);
+            packet.push_back(addr_source & 0xFF);
+
+            // Dest (16 bits)
+            packet.push_back(m_dest_port >> 8);
+            packet.push_back(m_dest_port & 0xFF);
+        }
 
         // calculate CRC over AF Header and payload
         uint16_t crc = 0xffff;
diff --git a/src/dabOutput/edi/PFT.h b/src/dabOutput/edi/PFT.h
index 1d09c0b..4aae817 100644
--- a/src/dabOutput/edi/PFT.h
+++ b/src/dabOutput/edi/PFT.h
@@ -39,6 +39,7 @@
 #include "AFPacket.h"
 #include "Log.h"
 #include "ReedSolomon.h"
+#include "dabOutput/dabOutput.h"
 
 typedef std::vector<uint8_t> RSBlock;
 typedef std::vector<uint8_t> PFTFragment;
@@ -49,12 +50,13 @@ class PFT
         static const int ParityBytes = 48;
 
         PFT(unsigned int RSDataWordLength,
-                unsigned int NumRecoverableFragments,
-                bool verbose) :
+            unsigned int NumRecoverableFragments,
+            const edi_configuration_t &conf) :
             m_k(RSDataWordLength),
             m_m(NumRecoverableFragments),
+            m_dest_port(conf.dest_port),
             m_pseq(0),
-            m_verbose(verbose)
+            m_verbose(conf.verbose)
         {
             if (m_k > 207) {
                 etiLog.level(warn) <<
@@ -84,6 +86,8 @@ class PFT
         unsigned int m_k; // length of RS data word
         unsigned int m_m; // number of fragments that can be recovered if lost
 
+        unsigned int m_dest_port; // Destination port for transport header
+
         uint16_t m_pseq;
 
         size_t m_num_chunks;
-- 
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