Detach shared capture safely while its audio buffer is resizing

tools/chatgui/src/audio_capture.cpp

@@ -157,7 +157,7 @@ void AudioCapture::close() {
 
 /* Callback отсоединён в GUI; session и контекст должны жить до завершения ma_device_uninit. */
 void AudioCapture::closeAsync() {
-    if (closing()) return;
+    if (!m_closeDone.load(std::memory_order_acquire)) return;
     if (m_closeThread.joinable()) m_closeThread.join();
     auto session = detach();
     if (!session) return;
@@ -184,6 +184,9 @@ void AudioCapture::closeAsync() {
 }
 
 void AudioCapture::recover() { if (m_session) m_session->recover(); }
+bool AudioCapture::closing() const {
+    return !m_closeDone.load(std::memory_order_acquire) || (m_session && m_session->device.closing());
+}
 bool AudioCapture::running() const {
     return m_session && m_prepared && m_session->device.initialized() && ma_device_is_started(m_session->device.device());
 }