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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2019-10-13 01:25:03 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2019-11-20 21:47:59 +0200
commitbc9527de454670445a8d69b039e65c0e5c7a699e (patch)
treeadf86f3510db4421b58507d7c4ac97171e49bec8 /include/linux/README
parent5f90d52d6e36c7d1c77717d026d0e7413d597d5e (diff)
ipa: Define a plain C API
The C++ objects that are expected to convey data through the IPA API will have associated methods that would require IPAs to link to libcamera. Even though the libcamera license allows this, suppliers of closed-source IPAs may have a different interpretation. To ease their mind and clearly separate vendor code and libcamera code, define a plain C IPA API. The corresponding C objects are stored in plain C structures or have their binary format documented, removing the need for linking to libcamera code on the IPA side. The C API adds three new C structures, ipa_context, ipa_context_ops and ipa_callback_ops. The ipa_context_ops and ipa_callback_ops contain function pointers for all the IPA interface methods and signals, respectively. The ipa_context represents a context of operation for the IPA, and is passed to the IPA oparations. The IPAInterface class is retained as it is easier to use than a plain C API for pipeline handlers, and wrappers will be developed to translate between the C and C++ APIs. Switching to the C API internally will be done in a second step. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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