Extending Libcamera to Provide a Fully Open Camera SoftISP Stack
summary
Project extends libcamera to convert raw Bayer frames into a usable webcam stream on mainstream distros by implementing a CPU SoftISP that does de‑Bayer plus 3A statistics and sensor gain control, outputs frames via pipewire for browser consumption, and integrates with libcamera IPAs. Current CPU build runs ~14 fps in debug and ~30 fps in release on a Qualcomm laptop but only ~2 fps on an older iMX8 4K sensor, so work moves to OpenGL ES compute shaders and DMA uncached buffer handling to reach real-time GPU acceleration.
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chapters (11)
- 0:00Introduction
- 1:54Bayer encoding importance
- 7:37Hardware ISP limitations
- 12:17Need for open SoftISP
- 15:12Libcamera and PipeWire integration
- 20:11CPU SoftISP performance
- 23:48GPU acceleration for SoftISP
- 26:41Live demo and CPU analysis
- 30:36Q&A: Implementation
- 32:30Q&A: Vector processing
- 33:55Closing
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