[libcamera-devel] [PATCH v6 4/6] libcamera: CameraSensor: Enable retrieving supported test pattern modes

[Hirokazu Honda]

This enables retrieving supported test pattern modes through
CameraSensorInfo.

Signed-off-by: Hirokazu Honda <hiroh at chromium.org>
Reviewed-by: Jacopo Mondi <jacopo at jmondi.org>
---
 include/libcamera/internal/camera_sensor.h |  7 +++++
 src/libcamera/camera_sensor.cpp            | 32 ++++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/include/libcamera/internal/camera_sensor.h b/include/libcamera/internal/camera_sensor.h
index cf6c1c1e..dcde647d 100644
--- a/include/libcamera/internal/camera_sensor.h
+++ b/include/libcamera/internal/camera_sensor.h
@@ -39,6 +39,10 @@ public:
 	const std::vector<unsigned int> &mbusCodes() const { return mbusCodes_; }
 	const std::vector<Size> &sizes() const { return sizes_; }
 	Size resolution() const;
+	const std::vector<uint8_t> &testPatternModes() const
+	{
+		return testPatternModes_;
+	}
 
 	V4L2SubdeviceFormat getFormat(const std::vector<unsigned int> &mbusCodes,
 				      const Size &size) const;
@@ -66,6 +70,8 @@ private:
 	void initVimcDefaultProperties();
 	void initStaticProperties();
 	int initProperties();
+	void initTestPatternModes(
+		const std::map<uint8_t, uint8_t> &testPatternModeMap);
 
 	const MediaEntity *entity_;
 	std::unique_ptr<V4L2Subdevice> subdev_;
@@ -77,6 +83,7 @@ private:
 	V4L2Subdevice::Formats formats_;
 	std::vector<unsigned int> mbusCodes_;
 	std::vector<Size> sizes_;
+	std::vector<uint8_t> testPatternModes_;
 
 	Size pixelArraySize_;
 	Rectangle activeArea_;
diff --git a/src/libcamera/camera_sensor.cpp b/src/libcamera/camera_sensor.cpp
index 0fb8a258..44dd5988 100644
--- a/src/libcamera/camera_sensor.cpp
+++ b/src/libcamera/camera_sensor.cpp
@@ -297,6 +297,30 @@ void CameraSensor::initVimcDefaultProperties()
 	activeArea_ = Rectangle(pixelArraySize_);
 }
 
+void CameraSensor::initTestPatternModes(
+	const std::map<uint8_t, uint8_t> &testPatternModeMap)
+{
+	const auto &v4l2TestPattern = controls().find(V4L2_CID_TEST_PATTERN);
+	if (v4l2TestPattern == controls().end()) {
+		LOG(CameraSensor, Debug) << "No static test pattern map for \'"
+					 << model() << "\'";
+		return;
+	}
+
+	for (const ControlValue &value : v4l2TestPattern->second.values()) {
+		const int32_t index = value.get<int32_t>();
+
+		const auto it = testPatternModeMap.find(index);
+		if (it == testPatternModeMap.end()) {
+			LOG(CameraSensor, Debug)
+				<< "Test pattern mode " << index << " ignored";
+			continue;
+		}
+
+		testPatternModes_.push_back(it->second);
+	}
+}
+
 void CameraSensor::initStaticProperties()
 {
 	const CameraSensorProperties *props = CameraSensorProperties::get(model_);
@@ -305,6 +329,8 @@ void CameraSensor::initStaticProperties()
 
 	/* Register the properties retrieved from the sensor database. */
 	properties_.set(properties::UnitCellSize, props->unitCellSize);
+
+	initTestPatternModes(props->testPatternModeMap);
 }
 
 int CameraSensor::initProperties()
@@ -469,6 +495,12 @@ Size CameraSensor::resolution() const
 	return std::min(sizes_.back(), activeArea_.size());
 }
 
+/**
+ * \fn CameraSensor::testPatternModes()
+ * \brief Retrieve all the supported test pattern modes of the camera sensor
+ * \return The list of test pattern modes
+ */
+
 /**
  * \brief Retrieve the best sensor format for a desired output
  * \param[in] mbusCodes The list of acceptable media bus codes
-- 
2.32.0.rc0.204.g9fa02ecfa5-goog