add basic combobox to choose output device, start using spdlog

src/audio/devices.cpp

@@ -0,0 +1,33 @@
+#include "devices.hpp"
+
+AudioDevices::AudioDevices()
+    : m_playback(Gtk::ListStore::create(m_playback_columns)) {
+}
+
+Glib::RefPtr<Gtk::ListStore> AudioDevices::GetPlaybackDeviceModel() {
+    return m_playback;
+}
+
+void AudioDevices::SetDevices(ma_device_info *pPlayback, ma_uint32 playback_count, ma_device_info *pCapture, ma_uint32 capture_count) {
+    m_playback->clear();
+
+    for (ma_uint32 i = 0; i < playback_count; i++) {
+        auto &d = pPlayback[i];
+        auto row = *m_playback->append();
+        row[m_playback_columns.Name] = d.name;
+        row[m_playback_columns.DeviceID] = d.id;
+    }
+}
+
+std::optional<ma_device_id> AudioDevices::GetDeviceIDFromModel(const Gtk::TreeModel::iterator &iter) {
+    if (iter) {
+        return static_cast<ma_device_id>((*iter)[m_playback_columns.DeviceID]);
+    } else {
+        return std::nullopt;
+    }
+}
+
+AudioDevices::PlaybackColumns::PlaybackColumns() {
+    add(Name);
+    add(DeviceID);
+}