Construct proper request template for recording.

Bug: b:144320997
Test: Open CCA in video mode and check control.captureIntent is
VIDEO_RECORD with metadata inspector.

Change-Id: I7b7027aaf0f6f8d5cae71fa9301edb5eabd36c2c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1911800
Auto-Submit: Shik Chen <shik@chromium.org>
Reviewed-by: Ricky Liang <jcliang@chromium.org>
Commit-Queue: Shik Chen <shik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714429}

media/capture/video/chromeos/camera_device_delegate.cc

@@ -765,8 +765,15 @@ void CameraDeviceDelegate::ConstructDefaultRequestSettings(
          device_context_->GetState() == CameraDeviceContext::State::kCapturing);
 
   if (stream_type == StreamType::kPreviewOutput) {
+    // CCA uses the same stream for preview and video recording. Choose proper
+    // template here so the underlying camera HAL can set 3A tuning accordingly.
+    auto request_template =
+        camera_app_device_ && camera_app_device_->GetCaptureIntent() ==
+                                  cros::mojom::CaptureIntent::VIDEO_RECORD
+            ? cros::mojom::Camera3RequestTemplate::CAMERA3_TEMPLATE_VIDEO_RECORD
+            : cros::mojom::Camera3RequestTemplate::CAMERA3_TEMPLATE_PREVIEW;
     device_ops_->ConstructDefaultRequestSettings(
-        cros::mojom::Camera3RequestTemplate::CAMERA3_TEMPLATE_PREVIEW,
+        request_template,
         base::BindOnce(
             &CameraDeviceDelegate::OnConstructedDefaultPreviewRequestSettings,
             GetWeakPtr()));