perf: reduce queue and autoplay memory footprint

src/view/maintoolbar.cpp

@@ -240,11 +240,20 @@ void MainToolBar::onTrackChanged(const QJsonObject &track)
 {
     setCurrentTrack(track);
 
-    if (track.contains("id")) {
+    const qint64 trackId = static_cast<qint64>(track["id"].toDouble());
-        m_recentTracks.append(track);
+    if (trackId <= 0)
+        return;
+
+    const qint64 artistId = static_cast<qint64>(
+        track["performer"].toObject()["id"].toDouble());
+    const qint64 genreId = static_cast<qint64>(
+        track["album"].toObject()["genre"].toObject()["id"].toDouble());
+    const qint64 labelId = static_cast<qint64>(
+        track["album"].toObject()["label"].toObject()["id"].toDouble());
+
+    m_recentTracks.append(RecentTrackSeed{trackId, artistId, genreId, labelId});
     while (m_recentTracks.size() > 32)
         m_recentTracks.removeFirst();
-    }
 }
 
 void MainToolBar::onPositionChanged(quint64 position, quint64 duration)
@@ -302,28 +311,18 @@ void MainToolBar::requestAutoplaySuggestions()
 
     const int n = m_recentTracks.size();
     for (int i = 0; i < n; ++i) {
-        const QJsonObject t = m_recentTracks.at(i);
+        const RecentTrackSeed &t = m_recentTracks.at(i);
-        const qint64 trackId = static_cast<qint64>(t["id"].toDouble());
-        if (trackId <= 0)
-            continue;
 
-        listenedIds.append(trackId);
+        listenedIds.append(t.trackId);
 
         if (i < qMax(0, n - 5))
             continue;
 
-        const qint64 artistId = static_cast<qint64>(
-            t["performer"].toObject()["id"].toDouble());
-        const qint64 genreId = static_cast<qint64>(
-            t["album"].toObject()["genre"].toObject()["id"].toDouble());
-        const qint64 labelId = static_cast<qint64>(
-            t["album"].toObject()["label"].toObject()["id"].toDouble());
-
         analyze.append(QJsonObject{
-            {"track_id", trackId},
+            {"track_id", t.trackId},
-            {"artist_id", artistId},
+            {"artist_id", t.artistId},
-            {"genre_id", genreId},
+            {"genre_id", t.genreId},
-            {"label_id", labelId},
+            {"label_id", t.labelId},
         });
     }
 

src/view/maintoolbar.hpp

@@ -55,6 +55,13 @@ private slots:
     void onAlbumArtReady(QNetworkReply *reply);
 
 private:
+    struct RecentTrackSeed {
+        qint64 trackId = 0;
+        qint64 artistId = 0;
+        qint64 genreId = 0;
+        qint64 labelId = 0;
+    };
+
     QobuzBackend *m_backend = nullptr;
     PlayQueue    *m_queue   = nullptr;
 
@@ -76,7 +83,7 @@ private:
     QNetworkAccessManager *m_nam = nullptr;
     QString     m_currentArtUrl;
     QJsonObject m_currentTrack;
-    QVector<QJsonObject> m_recentTracks;
+    QVector<RecentTrackSeed> m_recentTracks;
     bool        m_playing = false;
     bool        m_seeking = false;
     bool        m_fetchingAutoplay = false;

src/view/queuepanel.cpp

@@ -10,9 +10,8 @@
 
 static constexpr int UpcomingIndexRole = Qt::UserRole + 1;
 static constexpr int IsPlayNextRole    = Qt::UserRole + 2;
-static constexpr int TrackJsonRole     = Qt::UserRole + 3;
+static constexpr int ArtistRole        = Qt::UserRole + 3;
-static constexpr int ArtistRole        = Qt::UserRole + 4;
+static constexpr int DurationRole      = Qt::UserRole + 4;
-static constexpr int DurationRole      = Qt::UserRole + 5;
 
 // ---- Custom delegate -------------------------------------------------------
 
@@ -184,7 +183,6 @@ void QueuePanel::refresh()
         auto *item = new QListWidgetItem(title, m_list);
         item->setData(UpcomingIndexRole, i);
         item->setData(IsPlayNextRole, i < playNextCount);
-        item->setData(TrackJsonRole, QVariant::fromValue(t));
         item->setData(ArtistRole, artist);
         item->setData(DurationRole, duration);
     }
@@ -205,10 +203,14 @@ void QueuePanel::onRowsMoved()
 {
     if (m_refreshing) return;
 
+    const QVector<QJsonObject> currentUpcoming = m_queue->upcomingTracks();
     QVector<QJsonObject> newOrder;
     newOrder.reserve(m_list->count());
-    for (int i = 0; i < m_list->count(); ++i)
+    for (int i = 0; i < m_list->count(); ++i) {
-        newOrder.append(m_list->item(i)->data(TrackJsonRole).value<QJsonObject>());
+        const int prevIndex = m_list->item(i)->data(UpcomingIndexRole).toInt();
+        if (prevIndex >= 0 && prevIndex < currentUpcoming.size())
+            newOrder.append(currentUpcoming.at(prevIndex));
+    }
 
     m_refreshing = true;
     m_queue->setUpcomingOrder(newOrder);