Preserve voice autoplay ordering while decoding in a worker

tools/chatgui/src/mainwindow.cpp

@@ -968,7 +968,7 @@ void MainWindow::autoPlayCheckNewMessage(const QString& channelId) {
 }
 
 void MainWindow::autoPlayTimerTick() {
-    if (SoundManager::instance()->isCurrentPcmPlaying())
+    if (VoicePlayer::isPreparing() || SoundManager::instance()->isCurrentPcmPlaying())
         return;
 
     while (!m_autoPlayQueue.isEmpty()) {
@@ -996,8 +996,9 @@ void MainWindow::autoPlayTimerTick() {
                 DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "auto-play: playing ch=%s msg=%lld file=%s dur=%.1fs",
                            qPrintable(chId), (long long)msgId, qPrintable(fullPath), (double)dur);
                 MessageDelegate::stopAllAutoPlay();
-                float actualDur = VoicePlayer::playOpusFile(fullPath);
-                MessageDelegate::startAutoPlay(fullPath, actualDur);
+                VoicePlayer::playOpusFile(fullPath, this, [fullPath](float actualDur) {
+                    MessageDelegate::startAutoPlay(fullPath, actualDur);
+                });
                 return;
             }
         }