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/rkisp1/algorithms/agc.cpp

@@ -280,7 +280,9 @@ double Agc::measureBrightness(const rkisp1_cif_isp_hist_stat *hist) const
  * Identify the current image brightness, and use that to estimate the optimal
  * new exposure and gain for the scene.
  */
-void Agc::process(IPAContext &context, const rkisp1_stat_buffer *stats)
+void Agc::process(IPAContext &context,
+		  [[maybe_unused]] IPAFrameContext *frameContext,
+		  const rkisp1_stat_buffer *stats)
 {
 	const rkisp1_cif_isp_stat *params = &stats->params;
 	ASSERT(stats->meas_type & RKISP1_CIF_ISP_STAT_AUTOEXP);

src/ipa/rkisp1/algorithms/agc.h

@@ -29,7 +29,8 @@ public:
 
 	int configure(IPAContext &context, const IPACameraSensorInfo &configInfo) override;
 	void prepare(IPAContext &context, rkisp1_params_cfg *params) override;
-	void process(IPAContext &context, const rkisp1_stat_buffer *stats) override;
+	void process(IPAContext &context, IPAFrameContext *frameContext,
+		     const rkisp1_stat_buffer *stats) override;
 
 private:
 	void computeExposure(IPAContext &Context, double yGain, double iqMeanGain);

src/ipa/rkisp1/algorithms/algorithm.h

@@ -19,7 +19,9 @@ namespace libcamera {
 
 namespace ipa::rkisp1 {
 
-using Algorithm = libcamera::ipa::Algorithm<IPAContext, IPACameraSensorInfo, rkisp1_params_cfg, rkisp1_stat_buffer>;
+using Algorithm = libcamera::ipa::Algorithm<IPAContext, IPAFrameContext,
+					    IPACameraSensorInfo, rkisp1_params_cfg,
+					    rkisp1_stat_buffer>;
 
 } /* namespace ipa::rkisp1 */
 

src/ipa/rkisp1/algorithms/awb.cpp

@@ -119,7 +119,9 @@ void Awb::prepare(IPAContext &context, rkisp1_params_cfg *params)
 /**
  * \copydoc libcamera::ipa::Algorithm::process
  */
-void Awb::process([[maybe_unused]] IPAContext &context, const rkisp1_stat_buffer *stats)
+void Awb::process([[maybe_unused]] IPAContext &context,
+		  [[maybe_unused]] IPAFrameContext *frameCtx,
+		  const rkisp1_stat_buffer *stats)
 {
 	const rkisp1_cif_isp_stat *params = &stats->params;
 	const rkisp1_cif_isp_awb_stat *awb = &params->awb;

src/ipa/rkisp1/algorithms/awb.h

@@ -23,7 +23,8 @@ public:
 
 	int configure(IPAContext &context, const IPACameraSensorInfo &configInfo) override;
 	void prepare(IPAContext &context, rkisp1_params_cfg *params) override;
-	void process(IPAContext &context, const rkisp1_stat_buffer *stats) override;
+	void process(IPAContext &context, IPAFrameContext *frameCtx,
+		     const rkisp1_stat_buffer *stats) override;
 
 private:
 	uint32_t estimateCCT(double red, double green, double blue);