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When the IPA modules are installed, meson strips the DT_RPATH and
DT_RUNPATH from the binaries. This invalidates the signatures. Disable
installation of the .sign files and add an installation script to
regenerate them directly in the target directory. The .sign files still
need to be created at build time to support running IPA modules from the
build tree.
Two alternative approaches have been considered:
- meson could be taught a new target argument to preserve binary
compatibility by skipping any operation that modifies files. This has
been proposed in the #mesonbuild IRC channel. While this could be
interesting in the longer term, we need to fix the issue now.
- The module signatures could be computed on selected sections only.
While skipping the .dynamic section when signing may not cause
security issues, it would make signature generation and verification
more complex, and wasn't deemed worth it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The IPA module signing mechanism relies on openssl to generate keys and
sign the module. If openssl is not found on the system, the build will
fail. Make the dependency optional by detecting openssl, and skip
generation of signatures if openssl isn't found.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add infrastructure to generate an RSA private key and sign IPA modules.
The signatures are stored in separate files with a .sign suffix.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Switch IPA communication to the plain C API. As the IPAInterface class
is easier to use for pipeline handlers than a plain C API, retain it and
add an IPAContextWrapper that translate between the C++ and the C APIs.
On the IPA module side usage of IPAInterface may be desired for IPAs
implemented in C++ that want to link to libcamera. For those IPAs, a new
IPAInterfaceWrapper helper class is introduced to wrap the IPAInterface
implemented internally by the IPA module into an ipa_context,
ipa_context_ops and ipa_callback_ops.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Add an IPA which controls the exposure time and analog gain for a sensor
connected to the rkisp1 pipeline. The IPA supports turning AE on and off
and informing the camera of the status of the AE control loop.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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