Add EDI output and rework odr-audioenc.cpp

1 files changed, 77 insertions, 0 deletions

diff --git a/contrib/edi/PFT.h b/contrib/edi/PFT.h
new file mode 100644
index 0000000..6d41781
--- /dev/null
+++ b/contrib/edi/PFT.h
@@ -0,0 +1,77 @@
+/*
+   Copyright (C) 2019
+   Matthias P. Braendli, matthias.braendli@mpb.li
+
+    http://www.opendigitalradio.org
+
+   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 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/>.
+   */
+
+#pragma once
+
+#include "config.h"
+#include <vector>
+#include <list>
+#include <stdexcept>
+#include <stdint.h>
+#include "edi/AFPacket.h"
+#include "edi/ReedSolomon.h"
+#include "edi/Config.h"
+
+namespace edi {
+
+typedef std::vector<uint8_t> RSBlock;
+typedef std::vector<uint8_t> PFTFragment;
+
+class PFT
+{
+    public:
+        static constexpr int PARITYBYTES = 48;
+
+        PFT();
+        PFT(const configuration_t& conf);
+
+        // return a list of PFT fragments with the correct
+        // PFT headers
+        std::vector< PFTFragment > Assemble(AFPacket af_packet);
+
+        // Apply Reed-Solomon FEC to the AF Packet
+        RSBlock Protect(AFPacket af_packet);
+
+        // Cut a RSBlock into several fragments that can be transmitted
+        std::vector< std::vector<uint8_t> > ProtectAndFragment(AFPacket af_packet);
+
+    private:
+        unsigned int m_k = 207; // length of RS data word
+        unsigned int m_m = 3; // number of fragments that can be recovered if lost
+        unsigned int m_dest_port = 12000; // Destination port for transport header
+        uint16_t m_pseq = 0;
+        size_t m_num_chunks = 0;
+        bool m_verbose = 0;
+};
+
+}
+