[libcamera-devel] [RFC PATCH v2 4/5] libcamera: CameraSensor: Attach available test pattern modes

[Hirokazu Honda]

This add available test pattern modes to libcamera to
CameraSensorInfo.

Signed-off-by: Hirokazu Honda <hiroh at chromium.org>
---
 include/libcamera/internal/camera_sensor.h |  2 ++
 src/libcamera/camera_sensor.cpp            | 38 ++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/include/libcamera/internal/camera_sensor.h b/include/libcamera/internal/camera_sensor.h
index 3fa3a419..75b884db 100644
--- a/include/libcamera/internal/camera_sensor.h
+++ b/include/libcamera/internal/camera_sensor.h
@@ -38,6 +38,8 @@ struct CameraSensorInfo {
 
 	uint32_t minFrameLength;
 	uint32_t maxFrameLength;
+
+	std::vector<int32_t> availableTestPatternModes;
 };
 
 class CameraSensor : protected Loggable
diff --git a/src/libcamera/camera_sensor.cpp b/src/libcamera/camera_sensor.cpp
index c012385f..81d6af44 100644
--- a/src/libcamera/camera_sensor.cpp
+++ b/src/libcamera/camera_sensor.cpp
@@ -840,6 +840,44 @@ int CameraSensor::sensorInfo(CameraSensorInfo *info) const
 	info->minFrameLength = info->outputSize.height + vblank.min().get<int32_t>();
 	info->maxFrameLength = info->outputSize.height + vblank.max().get<int32_t>();
 
+	const SensorInfo *staticInfo = SensorDatabase::get(model_);
+	if (!staticInfo) {
+		LOG(CameraSensor, Warning)
+			<< "No static properties available for '" << model_ << "'";
+		LOG(CameraSensor, Warning)
+			<< "Please consider updating the sensor database";
+		return -EINVAL;
+	}
+
+	const auto &v4l2TestPattern = controls().find(V4L2_CID_TEST_PATTERN);
+	if (v4l2TestPattern == controls().end()) {
+		LOG(CameraSensor, Error) << "No static test pattern map for \'"
+					 << model() << "\'";
+		return 0;
+	}
+
+	for (const ControlValue &value : v4l2TestPattern->second.values()) {
+		const ControlMenu &menu = value.get<ControlMenu>();
+		ASSERT(menu.isName);
+
+		int32_t matchedTestPattern = -1;
+		for (const auto &[name, testPattern] : staticInfo->testPatternModeMap) {
+			if (strcmp(menu.name, name) == 0) {
+				matchedTestPattern = testPattern;
+				break;
+			}
+		}
+
+		if (matchedTestPattern != -1) {
+			LOG(CameraSensor, Debug) << "Test pattern mode named \'"
+						 << menu.name << "\' added";
+			info->availableTestPatternModes.push_back(matchedTestPattern);
+		} else {
+			LOG(CameraSensor, Debug) << "Test pattern mode named \'"
+						 << menu.name << "\' ignored";
+		}
+	}
+
 	return 0;
 }
 
-- 
2.31.1.295.g9ea45b61b8-goog