qcam: main_window: Move request queuing to a separate function

Requests are requeued synchronously from the completion handler. To
prepare for delayed requeuing, move the queuing to a separate function.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/qcam/main_window.cpp

@@ -389,20 +389,7 @@ void MainWindow::requestComplete(Request *request)
 
 	display(buffer);
 
-	request = camera_->createRequest();
-	if (!request) {
-		std::cerr << "Can't create request" << std::endl;
-		return;
-	}
-
-	for (auto it = buffers.begin(); it != buffers.end(); ++it) {
-		Stream *stream = it->first;
-		FrameBuffer *buffer = it->second;
-
-		request->addBuffer(stream, buffer);
-	}
-
-	camera_->queueRequest(request);
+	queueRequest(buffer);
 }
 
 int MainWindow::display(FrameBuffer *buffer)
@@ -417,3 +404,17 @@ int MainWindow::display(FrameBuffer *buffer)
 
 	return 0;
 }
+
+void MainWindow::queueRequest(FrameBuffer *buffer)
+{
+	Request *request = camera_->createRequest();
+	if (!request) {
+		std::cerr << "Can't create request" << std::endl;
+		return;
+	}
+
+	Stream *stream = config_->at(0).stream();
+	request->addBuffer(stream, buffer);
+
+	camera_->queueRequest(request);
+}