3 files changed, 29 insertions, 13 deletions
diff --git a/src/ipa/rkisp1/ipa_context.cpp b/src/ipa/rkisp1/ipa_context.cpp
index d18f4996..e9846742 100644
--- a/src/ipa/rkisp1/ipa_context.cpp
+++ b/src/ipa/rkisp1/ipa_context.cpp
@@ -205,8 +205,7 @@ namespace libcamera::ipa::rkisp1 {
  * \struct IPAFrameContext
  * \brief Per-frame context for algorithms
  *
- * This structure is currently unused and will be replaced by a real per-frame
- * context.
+ * \todo Populate the frame context for all algorithms
  */
 
 /**
@@ -219,7 +218,8 @@ namespace libcamera::ipa::rkisp1 {
  * \var IPAContext::activeState
  * \brief The IPA active state, storing the latest state for all algorithms
  *
- * \todo Introduce per-frame contexts
+ * \var IPAContext::frameContexts
+ * \brief Ring buffer of per-frame contexts
  */
 
 } /* namespace libcamera::ipa::rkisp1 */
diff --git a/src/ipa/rkisp1/ipa_context.h b/src/ipa/rkisp1/ipa_context.h
index f6b3e6eb..f6aaefff 100644
--- a/src/ipa/rkisp1/ipa_context.h
+++ b/src/ipa/rkisp1/ipa_context.h
@@ -97,6 +97,8 @@ struct IPAFrameContext : public FrameContext {
 struct IPAContext {
 	IPASessionConfiguration configuration;
 	IPAActiveState activeState;
+
+	FCQueue<IPAFrameContext> frameContexts;
 };
 
 } /* namespace ipa::rkisp1 */
diff --git a/src/ipa/rkisp1/rkisp1.cpp b/src/ipa/rkisp1/rkisp1.cpp
index e6aadb56..04956b2e 100644
--- a/src/ipa/rkisp1/rkisp1.cpp
+++ b/src/ipa/rkisp1/rkisp1.cpp
@@ -40,13 +40,18 @@ using namespace std::literals::chrono_literals;
 
 namespace ipa::rkisp1 {
 
+/* Maximum number of frame contexts to be held */
+static constexpr uint32_t kMaxFrameContexts = 16;
+
 class IPARkISP1 : public IPARkISP1Interface, public Module
 {
 public:
+	IPARkISP1();
+
 	int init(const IPASettings &settings, unsigned int hwRevision,
 		 ControlInfoMap *ipaControls) override;
 	int start() override;
-	void stop() override {}
+	void stop() override;
 
 	int configure(const IPACameraSensorInfo &info,
 		      const std::map<uint32_t, IPAStream> &streamConfig,
@@ -100,6 +105,11 @@ const ControlInfoMap::Map rkisp1Controls{
 
 } /* namespace */
 
+IPARkISP1::IPARkISP1()
+	: context_({ {}, {}, { kMaxFrameContexts } })
+{
+}
+
 std::string IPARkISP1::logPrefix() const
 {
 	return "rkisp1";
@@ -185,6 +195,11 @@ int IPARkISP1::start()
 	return 0;
 }
 
+void IPARkISP1::stop()
+{
+	context_.frameContexts.clear();
+}
+
 /**
  * \todo The RkISP1 pipeline currently provides an empty IPACameraSensorInfo
  * if the connected sensor does not provide enough information to properly
@@ -222,8 +237,10 @@ int IPARkISP1::configure([[maybe_unused]] const IPACameraSensorInfo &info,
 		<< "Exposure: " << minExposure << "-" << maxExposure
 		<< " Gain: " << minGain << "-" << maxGain;
 
-	/* Clean context at configuration */
-	context_ = {};
+	/* Clear the IPA context before the streaming session. */
+	context_.configuration = {};
+	context_.activeState = {};
+	context_.frameContexts.clear();
 
 	/* Set the hardware revision for the algorithms. */
 	context_.configuration.hw.revision = hwRevision_;
@@ -286,8 +303,7 @@ void IPARkISP1::unmapBuffers(const std::vector<unsigned int> &ids)
 
 void IPARkISP1::queueRequest(const uint32_t frame, const ControlList &controls)
 {
-	/* \todo Obtain the frame context to pass to process from the FCQueue */
-	IPAFrameContext frameContext;
+	IPAFrameContext &frameContext = context_.frameContexts.alloc(frame);
 
 	for (auto const &algo : algorithms())
 		algo->queueRequest(context_, frame, frameContext, controls);
@@ -295,8 +311,7 @@ void IPARkISP1::queueRequest(const uint32_t frame, const ControlList &controls)
 
 void IPARkISP1::fillParamsBuffer(const uint32_t frame, const uint32_t bufferId)
 {
-	/* \todo Obtain the frame context to pass to process from the FCQueue */
-	IPAFrameContext frameContext;
+	IPAFrameContext &frameContext = context_.frameContexts.get(frame);
 
 	rkisp1_params_cfg *params =
 		reinterpret_cast<rkisp1_params_cfg *>(
@@ -315,6 +330,8 @@ void IPARkISP1::fillParamsBuffer(const uint32_t frame, const uint32_t bufferId)
 void IPARkISP1::processStatsBuffer(const uint32_t frame, const uint32_t bufferId,
 				   const ControlList &sensorControls)
 {
+	IPAFrameContext &frameContext = context_.frameContexts.get(frame);
+
 	const rkisp1_stat_buffer *stats =
 		reinterpret_cast<rkisp1_stat_buffer *>(
 			mappedBuffers_.at(bufferId).planes()[0].data());
@@ -326,9 +343,6 @@ void IPARkISP1::processStatsBuffer(const uint32_t frame, const uint32_t bufferId
 
 	unsigned int aeState = 0;
 
-	/* \todo Obtain the frame context to pass to process from the FCQueue */
-	IPAFrameContext frameContext;
-
 	for (auto const &algo : algorithms())
 		algo->process(context_, frame, frameContext, stats);