libcamera: CameraSensor: Enable retrieving supported test pattern modes

This enables retrieving supported test pattern modes through
CameraSensorInfo.

Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/src/libcamera/camera_sensor.cpp b/src/libcamera/camera_sensor.cpp
index 0fb8a258..3e135353 100644
--- a/src/libcamera/camera_sensor.cpp
+++ b/src/libcamera/camera_sensor.cpp
@@ -305,6 +305,32 @@ void CameraSensor::initStaticProperties()
 
 	/* Register the properties retrieved from the sensor database. */
 	properties_.set(properties::UnitCellSize, props->unitCellSize);
+
+	initTestPatternModes(props->testPatternModes);
+}
+
+void CameraSensor::initTestPatternModes(
+	const std::map<int32_t, int32_t> &testPatternModes)
+{
+	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 = testPatternModes.find(index);
+		if (it == testPatternModes.end()) {
+			LOG(CameraSensor, Debug)
+				<< "Test pattern mode " << index << " ignored";
+			continue;
+		}
+
+		testPatternModes_.push_back(it->second);
+	}
 }
 
 int CameraSensor::initProperties()
@@ -470,6 +496,14 @@ Size CameraSensor::resolution() const
 }
 
 /**
+ * \fn CameraSensor::testPatternModes()
+ * \brief Retrieve all the supported test pattern modes of the camera sensor
+ * The test pattern mode values correspond to the controls::TestPattern control.
+ *
+ * \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
  * \param[in] size The desired size