From 472cbf21e567c0c65c124f96cebe717cdef901fb Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Sun, 12 Jan 2025 23:08:08 +0100
Subject: Play MIDI

---
 MIDIPlayer.cpp | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 52 insertions(+), 3 deletions(-)

(limited to 'MIDIPlayer.cpp')

diff --git a/MIDIPlayer.cpp b/MIDIPlayer.cpp
index 41f852e..c7945d6 100644
--- a/MIDIPlayer.cpp
+++ b/MIDIPlayer.cpp
@@ -1,27 +1,76 @@
 #include "MIDIPlayer.h"
 
-MIDIPlayer::MIDIPlayer()
+#include <signal.h>
+
+#include <iostream>
+
+namespace bp = boost::process;
+namespace fs = std::filesystem;
+
+MIDIPlayer::MIDIPlayer(const std::filesystem::path& path):
+  m_child{},
+  m_dir{path},
+  m_file{}
 {
-}
+  std::vector<std::string> list = get_filelist();
 
+  if (list.size() > 0) {
+    m_file = list[0];
+  }
+}
 
 void MIDIPlayer::start()
 {
-  "aplaymidi -p24 locked_out_of_heaven.midi"
+  if (m_child.valid() && m_child.running()) {
+    stop();
+  } else {
+    m_child = bp::child("aplaymidi -p24 locked_out_of_heaven.midi");//, bp::std_out > bp::null);
+  }
 }
 
 void MIDIPlayer::stop()
 {
+  // note:: m_child.terminate() would kill via SIGKILL, preventing note offs
+
+  if (m_child.valid()) {
+    int result = kill(m_child.native_handle(), SIGTERM);
+    if (result < 0) {
+      std::cerr << "Error in MIDIPlayer::stop(): kill() unsuccessful\n";
+    }
+  }
 }
 
 bool MIDIPlayer::is_playing()
 {
+  if (!m_child.valid()) {
+    return false;
+  }
+  return m_child.running();
 }
 
 void MIDIPlayer::set_file(const std::string& filename)
 {
+  m_file = filename;
+}
+
+std::string MIDIPlayer::get_file()
+{
+  return m_file;
 }
 
 std::vector<std::string> MIDIPlayer::get_filelist()
 {
+  std::vector<std::string> result;
+  for (auto const& dir_entry: fs::directory_iterator{m_dir}) {
+    fs::path entry{dir_entry.path()};
+    fs::path extension = entry.extension();
+    if (extension == ".midi" || extension == ".mid") {
+      result.push_back(entry.filename());
+    }
+    if (result.size() == 99) {
+      break;
+    }
+  }
+  return result;
 }
+
-- 
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