Previewing Development

When to Use

Use the camera module APIs to generate and play video streams.

Available APIs

For details, see Available APIs.

Constraints

None

How to Develop

1. Perform step 1 through step 4 described in Photographing Development.

2. Set the preview area.

   Surface *surface = Surface::CreateSurface();
   /* Set the display area. */
   surface->SetUserData("region_position_x", "480"); // X-coordinate of the upper left corner of the rectangle.
   surface->SetUserData("region_position_y", "270"); // Y-coordinate of the upper left corner of the rectangle.
   surface->SetUserData("region_width", "960"); // Width.
   surface->SetUserData("region_height", "540"); // Height.
   
   fc->AddSurface(*surface);

3. Start and stop previewing.

   stateCallback->camera_->TriggerLoopingCapture(*fc); // Start previewing.
   stateCallback->camera_->StopLoopingCapture(); // Stop previewing.