Qcarcam Api

// Process frame->data (NV12 buffer) process_image(frame->data, frame->size);

// Set manual exposure time (in microseconds) qcarcam_metadata_set_int32(&meta, QCARCAM_SENSOR_EXPOSURE_TIME, 10000); // 10ms qcarcam api

qcarcam_metadata_t meta; qcarcam_metadata_init(&meta); // Process frame-&gt

| Feature | Standard V4L2 | QCARCAM API | | :--- | :--- | :--- | | | Higher (due to kernel-to-user copying) | Minimal (Zero-copy architecture) | | Buffer Handling | mmap generic buffers | Platform specific, physically contiguous memory | | Hardware Control | Generic controls (standard IOCTLs) | Granular, vendor-specific tuning parameters | | ISP Integration | Loosely coupled | Tightly integrated with Qualcomm ISP | | Use Case | Infotainment, Webcams | ADAS, Digital Cockpit, Autonomous Driving | | CPU Overhead | Higher | Significantly Lower | data (NV12 buffer) process_image(frame-&gt

: Its primary purpose is to collect camera frames and dispatch events (like errors or state changes) with minimal latency. Safety Criticality : It is designed with Functional Safety (FuSa)

While V4L2 is supported on Qualcomm boards for backward compatibility, high-performance applications—particularly those involving Computer Vision (CV) or Deep Learning (DL) inference—almost exclusively utilize QCARCAM.