From 8a4f546b85d0887d1d5af0a428753c7d31304b72 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Sat, 17 May 2014 17:48:22 +0200
Subject: add non-working PFT layer

---
 src/dabOutput/edi/PFT.h | 77 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 src/dabOutput/edi/PFT.h

(limited to 'src/dabOutput/edi/PFT.h')

diff --git a/src/dabOutput/edi/PFT.h b/src/dabOutput/edi/PFT.h
new file mode 100644
index 0000000..713170f
--- /dev/null
+++ b/src/dabOutput/edi/PFT.h
@@ -0,0 +1,77 @@
+/*
+   Copyright (C) 2013 Matthias P. Braendli
+   http://mpb.li
+
+   EDI output,
+   Protection, Fragmentation and Transport. (PFT)
+
+   Are supported:
+    Reed-Solomon and Fragmentation
+
+   This implements part of PFT as defined ETSI TS 102 821.
+
+   */
+/*
+   This file is part of CRC-DabMux.
+
+   CRC-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.
+
+   CRC-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 CRC-DabMux.  If not, see <http://www.gnu.org/licenses/>.
+   */
+
+#ifndef _PFT_H_
+#define _PFT_H_
+
+#include "config.h"
+#include <vector>
+#include <list>
+#include <stdint.h>
+#include "AFPacket.h"
+#include "Log.h"
+#include "ReedSolomon.h"
+
+typedef std::vector<uint8_t> RSPacket;
+
+class PFT
+{
+    public:
+        static const int ParityBytes = 255 - 207;
+
+        PFT(unsigned int RSDataWordLength, unsigned int NumRecoverableFragments) :
+            m_k(RSDataWordLength), m_m(NumRecoverableFragments), m_encoder(255, 207)
+        {
+            if (m_m > 5) {
+                etiLog.level(warn) <<
+                    "EDI PFT: high number of recoverable fragments"
+                    " may lead to large overhead";
+                // See TS 102 821, 7.2.1 Known values, list entry for 'm'
+            }
+        }
+
+        // Apply Reed-Solomon FEC to the AF Packet
+        RSPacket Protect(AFPacket af_packet);
+
+        // Cut a RSPacket into several fragments that can be transmitted
+        std::vector< std::vector<uint8_t> > ProtectAndFragment(AFPacket af_packet);
+
+    private:
+        unsigned int m_k; // length of RS data word
+        unsigned int m_m; // number of fragments that can be recovered if lost
+
+        size_t m_num_chunks;
+
+        ReedSolomon m_encoder;
+
+};
+
+#endif
+
-- 
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