ipa: Switch to the plain C API

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>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/ipa/ipa_vimc.cpp b/src/ipa/ipa_vimc.cpp
index 50ca8dd8..8f03e811 100644
--- a/src/ipa/ipa_vimc.cpp
+++ b/src/ipa/ipa_vimc.cpp
@@ -17,7 +17,10 @@
 #include <ipa/ipa_interface.h>
 #include <ipa/ipa_module_info.h>
 
+#include "libipa/ipa_interface_wrapper.h"
+
 #include "log.h"
+#include "utils.h"
 
 namespace libcamera {
 
@@ -108,9 +111,9 @@ const struct IPAModuleInfo ipaModuleInfo = {
 	LICENSE,
 };
 
-IPAInterface *ipaCreate()
+struct ipa_context *ipaCreate()
 {
-	return new IPAVimc();
+	return new IPAInterfaceWrapper(utils::make_unique<IPAVimc>());
 }
 }