1 files changed, 160 insertions, 0 deletions
diff --git a/MainLoop.cpp b/MainLoop.cpp
new file mode 100644
index 0000000..1bd0e1d
--- /dev/null
+++ b/MainLoop.cpp
@@ -0,0 +1,160 @@
+#include "MainLoop.h"
+
+#include "Timer.h"
+#include "config.h"
+#include "log.h"
+
+#include <chrono>
+#include <cmath>
+#include <cstdint>
+#include <exception>
+#include <iostream>
+#include <limits>
+#include <memory>
+#include <stdexcept>
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <time.h>
+#include <signal.h>
+
+using namespace std::chrono_literals;
+using namespace std::string_literals;
+
+MainLoop::MainLoop():
+  m_config{},
+  m_note_click{m_config},
+  m_clock_click{},
+  m_internal_click{m_config},
+  m_midi{},
+  m_pcm{},
+  m_ui{m_config}
+{
+}
+
+bool run_flag = true;
+
+void signal_handler(int) {
+  run_flag = false;
+  std::cout << "Signal received. Terminating." << std::endl;
+}
+
+void MainLoop::reconfigure_mode() {
+  debug_cout << "reconfiguring mode" << std::endl;
+
+  m_click_connection.disconnect();
+
+  int mode = m_config.get_mode();
+
+  if (mode == 0) {
+    m_click_connection = m_note_click.signal_click.connect([&](){m_pcm.click(0);});
+  } else if (mode == 1) {
+    m_click_connection = m_clock_click.signal_click.connect([&](){m_pcm.click(0);});
+  } else if (mode == 2) {
+    m_click_connection = m_internal_click.signal_click.connect([&](int64_t offset){m_pcm.click(offset);});
+  } else {
+    log_cout << fmt::format("Error: Unknown mode: {}", mode) << std::endl;
+  }
+}
+
+int MainLoop::run()
+{
+  signal(SIGTERM, signal_handler);
+  signal(SIGINT, signal_handler);
+
+  try {
+    //debug_cout.activate();
+    log_cout.activate();
+    log_cout.log_lines(log_lines);
+
+    m_pcm.write();
+
+    Timer timer_50ms(50ms, true);
+    timer_50ms.start();
+
+    Timer timer_500ms(500ms, true);
+    timer_500ms.start();
+
+    Timer timer_10min(10min, true);
+    timer_10min.start();
+
+    // Main signals
+    boost::signals2::signal<void()> signal_count_loops;
+
+    //
+    // Signal-Slot Connections:
+    //
+    m_midi.signal_note.connect([&](int channel, int note, uint64_t timestamp){m_note_click.receive_note(channel, note, timestamp);});
+    //m_click_connection = m_note_click.signal_click.connect([&](){m_pcm.click(0);});
+    reconfigure_mode();
+    m_note_click.signal_bpm.connect([&](int bpm){m_ui.slot_note_bpm(bpm);});
+    m_clock_click.signal_bpm.connect([&](int bpm){m_ui.slot_clock_bpm(bpm);});
+    m_midi.signal_active_sensing.connect([&](){m_ui.slot_active_sensing();});
+    timer_500ms.elapsed.connect([&](){m_ui.draw();});
+    signal_count_loops.connect([&](){m_ui.count_main_loops();});
+    m_midi.signal_count_events.connect([&](){m_ui.count_midi_events();});
+    timer_10min.elapsed.connect([&](){m_config.persist();});
+    m_midi.signal_note.connect([&](int channel, int note, uint64_t timestamp){m_ui.slot_midi_note(channel, note, timestamp);});
+    m_midi.signal_clock.connect([&](){m_clock_click.receive_clock();});
+    m_config.signal_mode.connect([&](int mode){reconfigure_mode();});
+    timer_50ms.elapsed.connect([&](){m_internal_click.run_cyclic_50ms();});
+
+    m_midi.flush();
+
+    while (run_flag) {
+      debug_cout << "Main loop entered." << std::endl;
+      signal_count_loops();
+
+      fd_set read_set;
+      FD_ZERO(&read_set);
+      FD_SET(m_midi.fd(), &read_set);
+      FD_SET(0, &read_set);
+
+      if constexpr (0) {
+        // PCM fd almost always writeable: for single frames at high speed
+        fd_set write_set;
+        FD_ZERO(&write_set);
+        FD_SET(m_pcm.fd(), &write_set);
+      }
+
+      struct timeval timeout;
+      timeout.tv_sec = 0;
+      timeout.tv_usec = 20000;
+
+      int result = select(FD_SETSIZE, &read_set, nullptr/*&write_set*/, nullptr, &timeout);
+      if (result < 0) {
+        throw std::runtime_error("select() failed");
+      } else if (result == 0) {
+        debug_cout << "select() timeout" << std::endl;
+      }
+
+      while (m_midi.event_ready())
+      {
+        //std::cout << "read..." << std::endl;
+        auto event = m_midi.read();
+        //std::cout << "process..." << std::endl;
+        m_midi.process(event);
+      }
+
+      if (m_pcm.write_available()) {
+        //std::cout << "DEBUG: WRITE" << std::endl;
+        m_pcm.write();
+      }
+
+      if (m_ui.key_available()) {
+        m_ui.handle_input();
+      }
+
+      // handle timers, TODO: make updates more efficient at scale
+      timer_50ms.update();
+      timer_500ms.update();
+      timer_10min.update();
+    }
+  } catch (const std::exception& ex) {
+    std::cerr << "Error: " << ex.what() << std::endl;
+  }
+
+  return 0;
+}
+