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-rw-r--r--src/dabOutput/edi/Config.h71
-rw-r--r--src/dabOutput/edi/Interleaver.cpp1
-rw-r--r--src/dabOutput/edi/PFT.cpp30
-rw-r--r--src/dabOutput/edi/PFT.h57
-rw-r--r--src/dabOutput/edi/Transport.cpp164
-rw-r--r--src/dabOutput/edi/Transport.h68
6 files changed, 343 insertions, 48 deletions
diff --git a/src/dabOutput/edi/Config.h b/src/dabOutput/edi/Config.h
new file mode 100644
index 0000000..d3678d9
--- /dev/null
+++ b/src/dabOutput/edi/Config.h
@@ -0,0 +1,71 @@
+/*
+ Copyright (C) 2019
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ http://www.opendigitalradio.org
+
+ EDI output,
+ UDP and TCP transports and their configuration
+
+ */
+/*
+ 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 <string>
+#include <memory>
+#include <cstdint>
+
+namespace edi {
+
+/** Configuration for EDI output */
+
+struct destination_t {
+ virtual ~destination_t() {};
+};
+
+// Can represent both unicast and multicast destinations
+struct udp_destination_t : public destination_t {
+ std::string dest_addr;
+ std::string source_addr;
+ unsigned int source_port = 0;
+ unsigned int ttl = 10;
+};
+
+struct configuration_t {
+ unsigned chunk_len = 207; // RSk, data length of each chunk
+ unsigned fec = 0; // number of fragments that can be recovered
+ bool dump = false; // dump a file with the EDI packets
+ bool verbose = false;
+ bool enable_pft = false; // Enable protection and fragmentation
+ unsigned int tagpacket_alignment = 0;
+ std::vector<std::shared_ptr<destination_t> > destinations;
+ unsigned int dest_port = 0; // common destination port, because it's encoded in the transport layer
+ unsigned int latency_frames = 0; // if nonzero, enable interleaver with a latency of latency_frames * 24ms
+
+ bool enabled() const { return destinations.size() > 0; }
+ bool interleaver_enabled() const { return latency_frames > 0; }
+
+ void print() const;
+};
+
+}
+
+
diff --git a/src/dabOutput/edi/Interleaver.cpp b/src/dabOutput/edi/Interleaver.cpp
index e31326b..f26a50e 100644
--- a/src/dabOutput/edi/Interleaver.cpp
+++ b/src/dabOutput/edi/Interleaver.cpp
@@ -30,6 +30,7 @@
*/
#include "Interleaver.h"
+#include <cassert>
namespace edi {
diff --git a/src/dabOutput/edi/PFT.cpp b/src/dabOutput/edi/PFT.cpp
index 1c885f9..5b93016 100644
--- a/src/dabOutput/edi/PFT.cpp
+++ b/src/dabOutput/edi/PFT.cpp
@@ -1,5 +1,5 @@
/*
- Copyright (C) 2014
+ Copyright (C) 2019
Matthias P. Braendli, matthias.braendli@mpb.li
http://www.opendigitalradio.org
@@ -50,6 +50,30 @@ using namespace std;
// An integer division that rounds up, i.e. ceil(a/b)
#define CEIL_DIV(a, b) (a % b == 0 ? a / b : a / b + 1)
+PFT::PFT() { }
+
+PFT::PFT(const configuration_t &conf) :
+ m_k(conf.chunk_len),
+ m_m(conf.fec),
+ m_dest_port(conf.dest_port),
+ m_pseq(0),
+ m_num_chunks(0),
+ m_verbose(conf.verbose)
+ {
+ if (m_k > 207) {
+ etiLog.level(warn) <<
+ "EDI PFT: maximum chunk size is 207.";
+ throw std::out_of_range("EDI PFT Chunk size too large.");
+ }
+
+ 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'
+ }
+ }
+
RSBlock PFT::Protect(AFPacket af_packet)
{
RSBlock rs_block;
@@ -98,7 +122,7 @@ RSBlock PFT::Protect(AFPacket af_packet)
// Calculate RS for each chunk and assemble RS block
for (size_t i = 0; i < af_packet.size(); i+= chunk_len) {
vector<uint8_t> chunk(207);
- vector<uint8_t> protection(ParityBytes);
+ vector<uint8_t> protection(PARITYBYTES);
// copy chunk_len bytes into new chunk
memcpy(&chunk.front(), &af_packet[i], chunk_len);
@@ -139,7 +163,7 @@ vector< vector<uint8_t> > PFT::ProtectAndFragment(AFPacket af_packet)
#endif
// TS 102 821 7.2.2: s_max = MIN(floor(c*p/(m+1)), MTU - h))
- const size_t max_payload_size = ( m_num_chunks * ParityBytes ) / (m_m + 1);
+ const size_t max_payload_size = ( m_num_chunks * PARITYBYTES ) / (m_m + 1);
// Calculate fragment count and size
// TS 102 821 7.2.2: ceil((l + c*p + z) / s_max)
diff --git a/src/dabOutput/edi/PFT.h b/src/dabOutput/edi/PFT.h
index 05afdb1..4076bf3 100644
--- a/src/dabOutput/edi/PFT.h
+++ b/src/dabOutput/edi/PFT.h
@@ -1,5 +1,5 @@
/*
- Copyright (C) 2014
+ Copyright (C) 2019
Matthias P. Braendli, matthias.braendli@mpb.li
http://www.opendigitalradio.org
@@ -40,7 +40,7 @@
#include "AFPacket.h"
#include "Log.h"
#include "ReedSolomon.h"
-#include "dabOutput/dabOutput.h"
+#include "dabOutput/edi/Config.h"
namespace edi {
@@ -50,38 +50,10 @@ typedef std::vector<uint8_t> PFTFragment;
class PFT
{
public:
- static const int ParityBytes = 48;
-
- PFT() :
- m_k(207),
- m_m(3),
- m_dest_port(12000),
- m_pseq(0),
- m_num_chunks(0),
- m_verbose(false)
- { }
-
- PFT(const edi_configuration_t &conf) :
- m_k(conf.chunk_len),
- m_m(conf.fec),
- m_dest_port(conf.dest_port),
- m_pseq(0),
- m_num_chunks(0),
- m_verbose(conf.verbose)
- {
- if (m_k > 207) {
- etiLog.level(warn) <<
- "EDI PFT: maximum chunk size is 207.";
- throw std::out_of_range("EDI PFT Chunk size too large.");
- }
-
- 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'
- }
- }
+ static constexpr int PARITYBYTES = 48;
+
+ PFT();
+ PFT(const configuration_t& conf);
// return a list of PFT fragments with the correct
// PFT headers
@@ -94,17 +66,12 @@ class PFT
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
-
- unsigned int m_dest_port; // Destination port for transport header
-
- uint16_t m_pseq;
-
- size_t m_num_chunks;
-
- bool m_verbose;
-
+ 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;
};
}
diff --git a/src/dabOutput/edi/Transport.cpp b/src/dabOutput/edi/Transport.cpp
new file mode 100644
index 0000000..d433239
--- /dev/null
+++ b/src/dabOutput/edi/Transport.cpp
@@ -0,0 +1,164 @@
+/*
+ Copyright (C) 2019
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ http://www.opendigitalradio.org
+
+ EDI output,
+ UDP and TCP transports and their configuration
+
+ */
+/*
+ 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/>.
+ */
+
+#include "Transport.h"
+#include <iterator>
+
+using namespace std;
+
+namespace edi {
+
+void configuration_t::print() const
+{
+ etiLog.level(info) << "EDI";
+ etiLog.level(info) << " verbose " << verbose;
+ for (auto edi_dest : destinations) {
+ if (auto udp_dest = dynamic_pointer_cast<edi::udp_destination_t>(edi_dest)) {
+ etiLog.level(info) << " to " << udp_dest->dest_addr << ":" << dest_port;
+ if (not udp_dest->source_addr.empty()) {
+ etiLog.level(info) << " source " << udp_dest->source_addr;
+ etiLog.level(info) << " ttl " << udp_dest->ttl;
+ }
+ etiLog.level(info) << " source port " << udp_dest->source_port;
+ }
+ else {
+ throw std::logic_error("EDI destination not implemented");
+ }
+ }
+ if (interleaver_enabled()) {
+ etiLog.level(info) << " interleave " << latency_frames * 24 << " ms";
+ }
+}
+
+
+Sender::Sender(const configuration_t& conf) :
+ m_conf(conf),
+ edi_pft(m_conf)
+{
+ if (m_conf.verbose) {
+ etiLog.log(info, "Setup EDI");
+ }
+
+ for (const auto& edi_dest : m_conf.destinations) {
+ if (const auto udp_dest = dynamic_pointer_cast<edi::udp_destination_t>(edi_dest)) {
+ auto udp_socket = std::make_shared<UdpSocket>(udp_dest->source_port);
+
+ if (not udp_dest->source_addr.empty()) {
+ int err = udp_socket->setMulticastSource(udp_dest->source_addr.c_str());
+ if (err) {
+ throw runtime_error("EDI socket set source failed!");
+ }
+ err = udp_socket->setMulticastTTL(udp_dest->ttl);
+ if (err) {
+ throw runtime_error("EDI socket set TTL failed!");
+ }
+ }
+
+ udp_sockets.emplace(udp_dest.get(), udp_socket);
+ }
+ }
+
+ if (m_conf.interleaver_enabled()) {
+ edi_interleaver.SetLatency(m_conf.latency_frames);
+ }
+
+ if (m_conf.dump) {
+ edi_debug_file.open("./edi.debug");
+ }
+
+ if (m_conf.verbose) {
+ etiLog.log(info, "EDI set up");
+ }
+}
+
+void Sender::write(const TagPacket& tagpacket)
+{
+ // Assemble into one AF Packet
+ edi::AFPacket af_packet = edi_afPacketiser.Assemble(tagpacket);
+
+ if (m_conf.enable_pft) {
+ // Apply PFT layer to AF Packet (Reed Solomon FEC and Fragmentation)
+ vector<edi::PFTFragment> edi_fragments = edi_pft.Assemble(af_packet);
+
+ if (m_conf.verbose) {
+ fprintf(stderr, "EDI number of PFT fragment before interleaver %zu",
+ edi_fragments.size());
+ }
+
+ if (m_conf.interleaver_enabled()) {
+ edi_fragments = edi_interleaver.Interleave(edi_fragments);
+ }
+
+ // Send over ethernet
+ for (const auto& edi_frag : edi_fragments) {
+ for (auto& dest : m_conf.destinations) {
+ if (const auto& udp_dest = dynamic_pointer_cast<edi::udp_destination_t>(dest)) {
+ InetAddress addr;
+ addr.setAddress(udp_dest->dest_addr.c_str());
+ addr.setPort(m_conf.dest_port);
+
+ udp_sockets.at(udp_dest.get())->send(edi_frag, addr);
+ }
+ else {
+ throw std::logic_error("EDI destination not implemented");
+ }
+ }
+
+ if (m_conf.dump) {
+ std::ostream_iterator<uint8_t> debug_iterator(edi_debug_file);
+ std::copy(edi_frag.begin(), edi_frag.end(), debug_iterator);
+ }
+ }
+
+ if (m_conf.verbose) {
+ fprintf(stderr, "EDI number of PFT fragments %zu",
+ edi_fragments.size());
+ }
+ }
+ else {
+ // Send over ethernet
+ for (auto& dest : m_conf.destinations) {
+ if (const auto& udp_dest = dynamic_pointer_cast<edi::udp_destination_t>(dest)) {
+ InetAddress addr;
+ addr.setAddress(udp_dest->dest_addr.c_str());
+ addr.setPort(m_conf.dest_port);
+
+ udp_sockets.at(udp_dest.get())->send(af_packet, addr);
+ }
+ else {
+ throw std::logic_error("EDI destination not implemented");
+ }
+ }
+
+ if (m_conf.dump) {
+ std::ostream_iterator<uint8_t> debug_iterator(edi_debug_file);
+ std::copy(af_packet.begin(), af_packet.end(), debug_iterator);
+ }
+ }
+}
+
+}
diff --git a/src/dabOutput/edi/Transport.h b/src/dabOutput/edi/Transport.h
new file mode 100644
index 0000000..3c48c96
--- /dev/null
+++ b/src/dabOutput/edi/Transport.h
@@ -0,0 +1,68 @@
+/*
+ Copyright (C) 2019
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ http://www.opendigitalradio.org
+
+ EDI output,
+ UDP and TCP transports and their configuration
+
+ */
+/*
+ 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 "dabOutput/edi/Config.h"
+#include "AFPacket.h"
+#include "PFT.h"
+#include "Interleaver.h"
+#include <vector>
+#include <unordered_map>
+#include <stdexcept>
+#include <cstdint>
+#include "dabOutput/dabOutput.h"
+
+namespace edi {
+
+/** Configuration for EDI output */
+
+class Sender {
+ public:
+ Sender(const configuration_t& conf);
+
+ void write(const TagPacket& tagpacket);
+
+ private:
+ configuration_t m_conf;
+ std::ofstream edi_debug_file;
+
+ // The TagPacket will then be placed into an AFPacket
+ edi::AFPacketiser edi_afPacketiser;
+
+ // The AF Packet will be protected with reed-solomon and split in fragments
+ edi::PFT edi_pft;
+
+ // To mitigate for burst packet loss, PFT fragments can be sent out-of-order
+ edi::Interleaver edi_interleaver;
+
+ std::unordered_map<udp_destination_t*, std::shared_ptr<UdpSocket>> udp_sockets;
+};
+
+}
+
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