Add jf-assembler executable

This service reconstructs the various modules and sends out a
image metadata stream for further consumers.

jf-assembler/include/AssemblerStats.hpp

@@ -0,0 +1,28 @@
+#ifndef SF_DAQ_BUFFER_ASSEMBLERSTATS_HPP
+#define SF_DAQ_BUFFER_ASSEMBLERSTATS_HPP
+
+#include <chrono>
+#include <string>
+#include <formats.hpp>
+
+class AssemblerStats {
+    const std::string detector_name_;
+    const size_t stats_modulo_;
+
+    int image_counter_;
+    int n_corrupted_images_;
+    int n_sync_lost_images_;
+    std::chrono::time_point<std::chrono::steady_clock> stats_interval_start_;
+
+    void reset_counters();
+    void print_stats();
+
+public:
+    AssemblerStats(const std::string &detector_name,
+                   const size_t stats_modulo);
+
+    void record_stats(const ImageMetadata &meta, const uint32_t n_lost_pulses);
+};
+
+
+#endif //SF_DAQ_BUFFER_ASSEMBLERSTATS_HPP

jf-assembler/include/ZmqPulseSyncReceiver.hpp

@@ -0,0 +1,34 @@
+#ifndef SF_DAQ_BUFFER_ZMQPULSESYNCRECEIVER_HPP
+#define SF_DAQ_BUFFER_ZMQPULSESYNCRECEIVER_HPP
+
+
+#include <cstddef>
+#include <string>
+#include <vector>
+
+#include "formats.hpp"
+
+struct PulseAndSync {
+    const uint64_t pulse_id;
+    const uint32_t n_lost_pulses;
+};
+
+class ZmqPulseSyncReceiver {
+
+    void* ctx_;
+    const int n_modules_;
+
+    std::vector<void*> sockets_;
+
+public:
+    ZmqPulseSyncReceiver(
+            void* ctx,
+            const std::string& detector_name,
+            const int n_modules);
+    ~ZmqPulseSyncReceiver();
+
+    PulseAndSync get_next_pulse_id() const;
+};
+
+
+#endif //SF_DAQ_BUFFER_ZMQPULSESYNCRECEIVER_HPP

jf-assembler/include/assembler_config.hpp

@@ -0,0 +1,14 @@
+namespace assembler_config
+{
+    // N of IO threads to send image metadata.
+    const int ASSEMBLER_ZMQ_IO_THREADS = 1;
+
+    // If the modules are offset more than 1000 pulses, crush.
+    const uint64_t PULSE_OFFSET_LIMIT = 100;
+
+    // Number of times we try to re-sync in case of failure.
+    const int SYNC_RETRY_LIMIT = 3;
+
+    // Number of pulses between each statistics print out.
+    const size_t ASSEMBLER_STATS_MODULO = 1000;
+}