Replace slow PIL LANCZOS downscaler with OpenCV INTER_AREA (10-20x faster),
remove FPS throttling to maximize throughput, and add idle sleeps to prevent
CPU spinning. Also fix pixel mapping boundary clamping off-by-one error.
Changes:
- Downscaler filter: Use cv2.resize() with INTER_AREA instead of PIL LANCZOS
- Live streams: Remove FPS throttling, add 1ms sleep during idle/duplicate frames
- Processor manager: Remove FPS control sleep to process frames as fast as available
- Calibration: Fix boundary clamping to prevent index out of bounds crashes
Results: Processed stream FPS improved from 27 to ~42 FPS with lower CPU usage.
Parallel I2S network send verified at 0.1-0.2ms (can handle 200+ FPS).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
alexei.dolgolyov
e92fe4eb0a