[libcamera-devel] swisp performance notes

[Milan Zamazal]

Pavel Machek via libcamera-devel <libcamera-devel at lists.libcamera.org> writes:

> For some reason latest version uses full sensor resolution.

The same here on Debix Model A (with SoftwareISP-v04-hans1):

  DEBUG SimplePipeline simple.cpp:1005 Picked 3280x2464-SRGGB10_1X10 -> 3280x2464-SRGGB10 for max stream size 3276x2460

Resulting in:

  # ./cam -c 1 --capture=1 -s role=still
  ...
  ERROR V4L2 v4l2_videodevice.cpp:1906 /dev/video1[15:cap]: Failed to start streaming: Cannot allocate memory

The failing line is:

  ret = ioctl(VIDIOC_STREAMON, &bufferType_);

This is with available memory ~1.5 GB.

And:

  # LIBCAMERA_LOG_LEVELS='*:DEBUG' ./cam -c 1 --capture=1 -s role=still,width=640,height=480
  DEBUG SimplePipeline simple.cpp:751 Link 'imx219 1-0010':0 -> 'csis-32e40000.csi':0 configured with format 640x480-SRGGB10_1X10
  ...
  DEBUG SimplePipeline simple.cpp:1005 Picked 640x480-SRGGB10_1X10 -> 640x480-SRGGB10 for max stream size 640x480
  DEBUG SimplePipeline simple.cpp:1045 Adjusting size from 640x480 to 640x480
  ERROR Camera camera.cpp:1171 Can't configure camera with invalid configuration

It's hard for me to distinguish without deeper inspection whether dealing with
features or non-optimal defaults or user errors.

Regards,
Milan