ipa: rkisp1: dpf: Store per-frame information in frame context

Rework the algorithm's usage of the active state, to store the value of
controls for the last queued request in the queueRequest() function, and
store a copy of the values in the corresponding frame context. The
latter is used in the prepare() function to populate the ISP parameters
with values corresponding to the right frame.

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

src/ipa/rkisp1/algorithms/dpf.cpp

@@ -176,10 +176,11 @@ int Dpf::init([[maybe_unused]] IPAContext &context,
  */
 void Dpf::queueRequest(IPAContext &context,
 		       [[maybe_unused]] const uint32_t frame,
-		       [[maybe_unused]] IPAFrameContext &frameContext,
+		       IPAFrameContext &frameContext,
 		       const ControlList &controls)
 {
 	auto &dpf = context.activeState.dpf;
+	bool update = false;
 
 	const auto &denoise = controls.get(controls::draft::NoiseReductionMode);
 	if (denoise) {
@@ -187,35 +188,40 @@ void Dpf::queueRequest(IPAContext &context,
 
 		switch (*denoise) {
 		case controls::draft::NoiseReductionModeOff:
+			if (dpf.denoise) {
 				dpf.denoise = false;
-			dpf.updateParams = true;
+				update = true;
+			}
 			break;
 		case controls::draft::NoiseReductionModeMinimal:
 		case controls::draft::NoiseReductionModeHighQuality:
 		case controls::draft::NoiseReductionModeFast:
+			if (!dpf.denoise) {
 				dpf.denoise = true;
-			dpf.updateParams = true;
+				update = true;
+			}
 			break;
 		default:
 			LOG(RkISP1Dpf, Error)
 				<< "Unsupported denoise value "
 				<< *denoise;
+			break;
 		}
 	}
+
+	frameContext.dpf.denoise = dpf.denoise;
+	frameContext.dpf.update = update;
 }
 
 /**
  * \copydoc libcamera::ipa::Algorithm::prepare
  */
 void Dpf::prepare(IPAContext &context, const uint32_t frame,
-		  [[maybe_unused]] IPAFrameContext &frameContext,
+		  IPAFrameContext &frameContext, rkisp1_params_cfg *params)
-		  rkisp1_params_cfg *params)
 {
 	if (!initialized_)
 		return;
 
-	auto &dpf = context.activeState.dpf;
-
 	if (frame == 0) {
 		params->others.dpf_config = config_;
 		params->others.dpf_strength_config = strengthConfig_;
@@ -245,12 +251,10 @@ void Dpf::prepare(IPAContext &context, const uint32_t frame,
 					     RKISP1_CIF_ISP_MODULE_DPF_STRENGTH;
 	}
 
-	if (dpf.updateParams) {
+	if (frameContext.dpf.update) {
 		params->module_en_update |= RKISP1_CIF_ISP_MODULE_DPF;
-		if (dpf.denoise)
+		if (frameContext.dpf.denoise)
 			params->module_ens |= RKISP1_CIF_ISP_MODULE_DPF;
-
-		dpf.updateParams = false;
 	}
 }
 

src/ipa/rkisp1/ipa_context.cpp

@@ -168,9 +168,6 @@ namespace libcamera::ipa::rkisp1 {
  *
  * \var IPAActiveState::dpf.denoise
  * \brief Indicates if denoise is activated
- *
- * \var IPAActiveState::dpf.updateParams
- * \brief Indicates if ISP parameters need to be updated
  */
 
 /**
@@ -251,6 +248,18 @@ namespace libcamera::ipa::rkisp1 {
  * compared to the previous frame
  */
 
+/**
+ * \var IPAFrameContext::dpf
+ * \brief Denoise Pre-Filter parameters for this frame
+ *
+ * \var IPAFrameContext::dpf.denoise
+ * \brief Indicates if denoise is activated
+ *
+ * \var IPAFrameContext::dpf.update
+ * \brief Indicates if the denoise pre-filter parameters have been updated
+ * compared to the previous frame
+ */
+
 /**
  * \var IPAFrameContext::sensor
  * \brief Sensor configuration that used been used for this frame

src/ipa/rkisp1/ipa_context.h

@@ -79,7 +79,6 @@ struct IPAActiveState {
 
 	struct {
 		bool denoise;
-		bool updateParams;
 	} dpf;
 
 	struct {
@@ -113,6 +112,11 @@ struct IPAFrameContext : public FrameContext {
 		bool update;
 	} cproc;
 
+	struct {
+		bool denoise;
+		bool update;
+	} dpf;
+
 	struct {
 		uint32_t exposure;
 		double gain;