Preserve stream capture settings and refine audio playback

tools/chatgui/src/mainwindow.cpp

@@ -83,13 +83,15 @@ static void unixSignalHandler(int) { g_signalFlag = 1; }
 #endif
 
 /* Сохранение key/value в БД (ui_state). Пишется из utun-потока через trampoline,
-   чтобы не трогать sqlite из GUI-потока. Буфер формата key\0value\0, ≤256 байт. */
+   чтобы не трогать sqlite из GUI-потока. Буфер формата key\0value\0. */
 static void postUiStateKv(const char* key, const QString& value) {
     QByteArray val = value.toUtf8();
     size_t klen = strlen(key), vlen = (size_t)val.size(), total = klen + 1 + vlen + 1;
-    if (total > 256) return;
+    if (total > sizeof(save_ui_state_arg::data)) {
+        DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "UI setting too large key=%s bytes=%zu", key, total); return;
+    }
     struct save_ui_state_arg* arg = (struct save_ui_state_arg*)u_malloc(sizeof(struct save_ui_state_arg));
-    if (!arg) return;
+    if (!arg) { DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "UI setting allocation failed key=%s", key); return; }
     arg->inst = gui_bridge_get_inst();
     memcpy(arg->data, key, klen + 1);
     memcpy(arg->data + klen + 1, val.constData(), vlen + 1);
@@ -628,7 +630,10 @@ void MainWindow::setupConnects() {
             });
         }
         if (m_streamPublishWindow) delete m_streamPublishWindow.data();
-        m_streamPublishWindow = new StreamPublishWindow(m_streamPublisher, m_streamPublisher->active() ? m_streamPublisher->group() : group, this);
+        m_streamPublishWindow = new StreamPublishWindow(m_streamPublisher, m_streamPublisher->active() ? m_streamPublisher->group() : group,
+            this, m_db ? m_db->getUiState("stream_capture_settings") : QString());
+        connect(m_streamPublishWindow, &StreamPublishWindow::settingsChanged, this,
+            [](const QString& settings) { postUiStateKv("stream_capture_settings", settings); });
         m_streamPublishWindow->show(); m_streamPublishWindow->raise(); m_streamPublishWindow->activateWindow();
     });
     connect(m_messageList, &MessageList::streamRequested, this,