Vehicle Camera Framework

Vehicle Camera Framework. MMG-Media Linux Team 2022/09/15.

Development Background What is vehicle camera framework? Future Plans.

Development Background.

Traditional camera framework. Camera and Video architecture gst-launch QMMF SRC (GST element) (qmmfsrc) YUV YUV YUV Raw/1080P H 264 H264 GST Element (tcpsink) GST Element (fliesink) GST Elements (qumlesng» qomlotfhte) File src I Network src ROS2 Multimedia Subsystem QMMF Server Camera Adaptor Camera HAL3 Capture O AVCodec OMX (ornxh&knc) V4L2 Accelerated Video HIW decxxier) Kernel (Camera, V4L2 drivers) Camera ISP GSTWayland Sink (waylandsink) Display Subsystem Display.

Integration Telechips DVRS and e-Mirror SDK. DVRS (Drive Video Record System) Recording Preview on Dash LCD e-Mirror Preview on side, rear view mirror Camera Provide one source Implemented same way with traditional camera framework Integration two SDK Requirement DVRS and e-Mirror work at same time Miss Camera select only one application Need to rework Camera framework Design Goal Camera framework can share output into two applications at the same time..

Camera Applications in Automotive Development. Multi propose camera Viewing Recording Sensing(Vision) Vision and image processing Surround view Traffic Sign Recognition Emergency braking Lane Departure warning Blind Spot Detection Park Assistance Rear Collision warning In case of overlapping ROI, there is a possibility that multiple applications share camera's output. Design Goal Camera framework can share output into multi applications at the same time..

Various video formats for applications. Depending on the application, different video image format and resolution are used. Design Goal Camera framework can share various video formats that applications request..

What is vehicle camera framework?.

Design Goals. Camera framework can share output into multi applications at the same time. Camera framework can share various video formats that applications request. Suitable for low-power/memory embedded device..

Architecture. Gstreamer plugin Applications Framework HAL KERNEL : camera source OMX component : Source Camera Server Strean SÄ Strean Camera HALO Kernel (Camera, V4L2) Chi—a ISP Custom application Carn«a Mæla.*r JPEG.

How to share camera output (1). Concept Multiple applications access the frame buffer at the same time. A shared memory address is provided by VCF. Frame Buffer Reserved physical memory region for holding camera captured frames.

How to share camera output (2). Scalability Issues in Video For Linux2 (V4L2) If the device is preempted by a process, other processes cannot access the camera. Shared Memory Mapping Multiple applications access the frame buffer at the same time. A shared memory address is provided by VCF through IPC..

Buffer expiration Problem.

Multiple Format Sharing (1).

Multiple Format Sharing (2).

Future Plans.

[Audio] 현재 구현은 카메라 공유가 가능하며, 캡쳐 동작 지원합니다. 포맷 변환은 미 구현된 상태입니다. 첫 번째는 DVRS와 이미러 조합으로 동시 동작 테스트합니다. TCC8050 EVB 보드에서 두개 어플리케이션 실행합니다. LCD에 같은 카메라에 대해서 두개 프리뷰 출력합니다 DVRS 어플리케이션은 프리뷰에 추가로 4개 카메라 영상 레코딩합니다. 두 번째는 다수 어플리케이션이 동작하는지 테스트합니다. 결과는 20개 어플리케이션이 동시 수행되는 것 보여줍니다. 안정적으로 캡쳐되는 것을 확인할 수 있었습니다..

Future Plans.