void _mmcamcorder_destroy_video_capture_pipeline(MMHandleType handle);
int _mmcamcorder_initialize_extra_preview_mode(MMHandleType handle);
+int _mmcamcorder_deinitialize_extra_preview_mode(MMHandleType handle);
int _mmcamcorder_set_extra_preview_device_type(MMHandleType handle, int stream_id, int device_type);
int _mmcamcorder_set_extra_preview_stream_format(MMHandleType handle, int stream_id, int pixel_format, int width, int height, int fps);
int _mmcamcorder_get_extra_preview_stream_format(MMHandleType handle, int stream_id, int *pixel_format, int *width, int *height, int *fps);