[libcamera-devel] [PATCH v4 1/5] ipa: rkisp1: Use frame counter for the request queued

[Jean-Michel Hautbois]

Introduce a frameCount variable in the IPAFrameContext which increments
each time a request is queued. It is reset at configure call, when the
camera is started.

This will allow the frameCount to be used by other algorithms, without
having to keep multiple private frame counters.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois at ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain at ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 src/ipa/rkisp1/ipa_context.cpp | 11 ++++++++++-
 src/ipa/rkisp1/ipa_context.h   |  4 +++-
 src/ipa/rkisp1/rkisp1.cpp      |  3 +++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/ipa/rkisp1/ipa_context.cpp b/src/ipa/rkisp1/ipa_context.cpp
index 9cb2a9fd..c22e02d5 100644
--- a/src/ipa/rkisp1/ipa_context.cpp
+++ b/src/ipa/rkisp1/ipa_context.cpp
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 /*
- * Copyright (C) 2021, Ideas On Board
+ * Copyright (C) 2021-2022, Ideas On Board
  *
  * ipa_context.cpp - RkISP1 IPA Context
  */
@@ -113,4 +113,13 @@ namespace libcamera::ipa::rkisp1 {
  * \brief Analogue gain multiplier
  */
 
+/**
+ * \var IPAFrameContext::frameCount
+ * \brief Counter of requests queued to the IPA module
+ *
+ * The counter is reset to 0 when the IPA module is configured, and is
+ * incremented for each request being queued, after calling the
+ * Algorithm::prepare() function of all algorithms.
+ */
+
 } /* namespace libcamera::ipa::rkisp1 */
diff --git a/src/ipa/rkisp1/ipa_context.h b/src/ipa/rkisp1/ipa_context.h
index b94ade0c..212fa052 100644
--- a/src/ipa/rkisp1/ipa_context.h
+++ b/src/ipa/rkisp1/ipa_context.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 /*
- * Copyright (C) 2021, Ideas On Board
+ * Copyright (C) 2021-2022, Ideas On Board
  *
  * ipa_context.h - RkISP1 IPA Context
  *
@@ -43,6 +43,8 @@ struct IPAFrameContext {
 		uint32_t exposure;
 		double gain;
 	} sensor;
+
+	unsigned int frameCount;
 };
 
 struct IPAContext {
diff --git a/src/ipa/rkisp1/rkisp1.cpp b/src/ipa/rkisp1/rkisp1.cpp
index 2225a84d..493811d9 100644
--- a/src/ipa/rkisp1/rkisp1.cpp
+++ b/src/ipa/rkisp1/rkisp1.cpp
@@ -190,6 +190,8 @@ int IPARkISP1::configure([[maybe_unused]] const IPACameraSensorInfo &info,
 	context_.configuration.agc.minAnalogueGain = camHelper_->gain(minGain);
 	context_.configuration.agc.maxAnalogueGain = camHelper_->gain(maxGain);
 
+	context_.frameContext.frameCount = 0;
+
 	for (auto const &algo : algorithms_) {
 		int ret = algo->configure(context_, info);
 		if (ret)
@@ -243,6 +245,7 @@ void IPARkISP1::queueRequest(const uint32_t frame, const uint32_t bufferId,
 		algo->prepare(context_, params);
 
 	paramsBufferReady.emit(frame);
+	context_.frameContext.frameCount++;
 }
 
 void IPARkISP1::processStatsBuffer(const uint32_t frame, const uint32_t bufferId,
-- 
2.32.0