ipa: libipa: Add frame context pointer in process()

Currently we have a single structure of IPAFrameContext but
subsequently, we shall have a ring buffer (or similar) container
to keep IPAFrameContext structures for each frame.

It would be a hassle to query out the frame context required for
process() (since they will reside in a ring buffer) by the IPA
for each process. Hence, prepare the process() libipa template to
accept a particular IPAFrameContext early on.

As for this patch, we shall pass in the pointer as nullptr, so
that the changes compile and keep working as-is.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/ipa/ipu3/algorithms/af.cpp

@@ -406,6 +406,7 @@ bool Af::afIsOutOfFocus(IPAContext context)
 /**
  * \brief Determine the max contrast image and lens position.
  * \param[in] context The IPA context.
+ * \param[in] frameContext The current frame context
  * \param[in] stats The statistics buffer of IPU3.
  *
  * Ideally, a clear image also has a relatively higher contrast. So, every
@@ -419,7 +420,8 @@ bool Af::afIsOutOfFocus(IPAContext context)
  *
  * [1] Hill Climbing Algorithm, https://en.wikipedia.org/wiki/Hill_climbing
  */
-void Af::process(IPAContext &context, const ipu3_uapi_stats_3a *stats)
+void Af::process(IPAContext &context, [[maybe_unused]] IPAFrameContext *frameContext,
+		 const ipu3_uapi_stats_3a *stats)
 {
 	/* Evaluate the AF buffer length */
 	uint32_t afRawBufferLen = context.configuration.af.afGrid.width *