ipa: Pass metadata to Algorithm::process() function

Extend the Algorithm::process() function with a metadata control list,
to be filled by individual algorithms with frame metadata. Update the
rkisp1 and ipu3 IPA modules accordingly, and drop the dead code in the
IPARkISP1::prepareMetadata() function while at it.

This only creates the infrastructure, filling metadata in individual
algorithms will be handled separately.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

8 files changed, 19 insertions, 8 deletions

diff --git a/src/ipa/ipu3/algorithms/af.cpp b/src/ipa/ipu3/algorithms/af.cpp
index 75632aa3..5a0452a5 100644
--- a/src/ipa/ipu3/algorithms/af.cpp
+++ b/src/ipa/ipu3/algorithms/af.cpp
@@ -409,6 +409,7 @@ bool Af::afIsOutOfFocus(IPAContext &context)
  * \param[in] frame The frame context sequence number
  * \param[in] frameContext The current frame context
  * \param[in] stats The statistics buffer of IPU3
+ * \param[out] metadata Metadata for the frame, to be filled by the algorithm
  *
  * Ideally, a clear image also has a relatively higher contrast. So, every
  * image for each focus step should be tested to find an optimal focus step.
@@ -423,7 +424,8 @@ bool Af::afIsOutOfFocus(IPAContext &context)
  */
 void Af::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
 		 [[maybe_unused]] IPAFrameContext &frameContext,
-		 const ipu3_uapi_stats_3a *stats)
+		 const ipu3_uapi_stats_3a *stats,
+		 [[maybe_unused]] ControlList &metadata)
 {
 	/* Evaluate the AF buffer length */
 	uint32_t afRawBufferLen = context.configuration.af.afGrid.width *
diff --git a/src/ipa/ipu3/algorithms/af.h b/src/ipa/ipu3/algorithms/af.h
index 89d37ac1..c6168e30 100644
--- a/src/ipa/ipu3/algorithms/af.h
+++ b/src/ipa/ipu3/algorithms/af.h
@@ -36,7 +36,8 @@ public:
 		     ipu3_uapi_params *params) override;
 	void process(IPAContext &context, const uint32_t frame,
 		     IPAFrameContext &frameContext,
-		     const ipu3_uapi_stats_3a *stats) override;
+		     const ipu3_uapi_stats_3a *stats,
+		     ControlList &metadata) override;
 
 private:
 	void afCoarseScan(IPAContext &context);
diff --git a/src/ipa/ipu3/algorithms/agc.cpp b/src/ipa/ipu3/algorithms/agc.cpp
index a1a3c38f..f4e559bf 100644
--- a/src/ipa/ipu3/algorithms/agc.cpp
+++ b/src/ipa/ipu3/algorithms/agc.cpp
@@ -320,13 +320,15 @@ double Agc::estimateLuminance(IPAActiveState &activeState,
  * \param[in] frame The current frame sequence number
  * \param[in] frameContext The current frame context
  * \param[in] stats The IPU3 statistics and ISP results
+ * \param[out] metadata Metadata for the frame, to be filled by the algorithm
  *
  * Identify the current image brightness, and use that to estimate the optimal
  * new exposure and gain for the scene.
  */
 void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
 		  IPAFrameContext &frameContext,
-		  const ipu3_uapi_stats_3a *stats)
+		  const ipu3_uapi_stats_3a *stats,
+		  [[maybe_unused]] ControlList &metadata)
 {
 	/*
 	 * Estimate the gain needed to have the proportion of pixels in a given
diff --git a/src/ipa/ipu3/algorithms/agc.h b/src/ipa/ipu3/algorithms/agc.h
index 59b4b984..9d6e3ff1 100644
--- a/src/ipa/ipu3/algorithms/agc.h
+++ b/src/ipa/ipu3/algorithms/agc.h
@@ -30,7 +30,8 @@ public:
 	int configure(IPAContext &context, const IPAConfigInfo &configInfo) override;
 	void process(IPAContext &context, const uint32_t frame,
 		     IPAFrameContext &frameContext,
-		     const ipu3_uapi_stats_3a *stats) override;
+		     const ipu3_uapi_stats_3a *stats,
+		     ControlList &metadata) override;
 
 private:
 	double measureBrightness(const ipu3_uapi_stats_3a *stats,
diff --git a/src/ipa/ipu3/algorithms/awb.cpp b/src/ipa/ipu3/algorithms/awb.cpp
index 0dbd7d4c..6452b6a1 100644
--- a/src/ipa/ipu3/algorithms/awb.cpp
+++ b/src/ipa/ipu3/algorithms/awb.cpp
@@ -389,7 +389,8 @@ void Awb::calculateWBGains(const ipu3_uapi_stats_3a *stats)
  */
 void Awb::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
 		  [[maybe_unused]] IPAFrameContext &frameContext,
-		  const ipu3_uapi_stats_3a *stats)
+		  const ipu3_uapi_stats_3a *stats,
+		  [[maybe_unused]] ControlList &metadata)
 {
 	calculateWBGains(stats);
 
diff --git a/src/ipa/ipu3/algorithms/awb.h b/src/ipa/ipu3/algorithms/awb.h
index 28e2d38a..7a70854e 100644
--- a/src/ipa/ipu3/algorithms/awb.h
+++ b/src/ipa/ipu3/algorithms/awb.h
@@ -44,7 +44,8 @@ public:
 		     ipu3_uapi_params *params) override;
 	void process(IPAContext &context, const uint32_t frame,
 		     IPAFrameContext &frameContext,
-		     const ipu3_uapi_stats_3a *stats) override;
+		     const ipu3_uapi_stats_3a *stats,
+		     ControlList &metadata) override;
 
 private:
 	/* \todo Make these structs available to all the ISPs ? */
diff --git a/src/ipa/ipu3/algorithms/tone_mapping.cpp b/src/ipa/ipu3/algorithms/tone_mapping.cpp
index eac3d406..a169894c 100644
--- a/src/ipa/ipu3/algorithms/tone_mapping.cpp
+++ b/src/ipa/ipu3/algorithms/tone_mapping.cpp
@@ -79,13 +79,15 @@ void ToneMapping::prepare([[maybe_unused]] IPAContext &context,
  * \param[in] frame The current frame sequence number
  * \param[in] frameContext The current frame context
  * \param[in] stats The IPU3 statistics and ISP results
+ * \param[out] metadata Metadata for the frame, to be filled by the algorithm
  *
  * The tone mapping look up table is generated as an inverse power curve from
  * our gamma setting.
  */
 void ToneMapping::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
 			  [[maybe_unused]] IPAFrameContext &frameContext,
-			  [[maybe_unused]] const ipu3_uapi_stats_3a *stats)
+			  [[maybe_unused]] const ipu3_uapi_stats_3a *stats,
+			  [[maybe_unused]] ControlList &metadata)
 {
 	/*
 	 * Hardcode gamma to 1.1 as a default for now.
diff --git a/src/ipa/ipu3/algorithms/tone_mapping.h b/src/ipa/ipu3/algorithms/tone_mapping.h
index 822e5168..5ae35da5 100644
--- a/src/ipa/ipu3/algorithms/tone_mapping.h
+++ b/src/ipa/ipu3/algorithms/tone_mapping.h
@@ -23,7 +23,8 @@ public:
 		     IPAFrameContext &frameContext, ipu3_uapi_params *params) override;
 	void process(IPAContext &context, const uint32_t frame,
 		     IPAFrameContext &frameContext,
-		     const ipu3_uapi_stats_3a *stats) override;
+		     const ipu3_uapi_stats_3a *stats,
+		     ControlList &metadata) override;
 
 private:
 	double gamma_;