Results differ from the default configurations reported in graph_settings_ov5670.xml

[jmondi]

Hello,
i"m using this tool as guideline to configure the IPU3 pipeline handler in libcamera, basically re-implementing there the same logic you have here.

However I have noticed the results from this tool differ from the suggested configuration reported in
https://chromium.googlesource.com/chromiumos/overlays/board-overlays/+/master/baseboard-poppy/media-libs/cros-camera-hal-configs-poppy/files/gcss/graph_settings_ov5670.xml

In example, for the stream configuration

input width="2592" height="1944" format="CIO2"
vf width="1280" height="720" format="NV12" peer="vf"
main width="1280" height="720" format="NV12" peer="main"
if width="2592" height="1608"
bds width="1296" height="804"
gdc width="1280" height="720"

the tool calculates:

$ python pipe_config.py input=2592x1944 main=1280x720 vf=1280x720
output_res_if:2592x1464
output_res_bds:1296x732
output_res_gdc:1280x720

As you can see the IF and BDS rectanglea are different.

Which one is the most authoritative source I should use as a reference ?

Thanks