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-rw-r--r--src/libcamera/camera_sensor.cpp40
-rw-r--r--src/libcamera/include/camera_sensor.h2
2 files changed, 42 insertions, 0 deletions
diff --git a/src/libcamera/camera_sensor.cpp b/src/libcamera/camera_sensor.cpp
index 7c1d9b9e..3d7cedca 100644
--- a/src/libcamera/camera_sensor.cpp
+++ b/src/libcamera/camera_sensor.cpp
@@ -12,6 +12,7 @@
#include <iomanip>
#include <limits.h>
#include <math.h>
+#include <regex>
#include <libcamera/property_ids.h>
@@ -87,6 +88,35 @@ int CameraSensor::init()
return -EINVAL;
}
+ /*
+ * Extract the camera sensor model name from the media entity name.
+ *
+ * There is no standardized naming scheme for sensor entities in the
+ * Linux kernel at the moment.
+ *
+ * - The most common rule, used by I2C sensors, associates the model
+ * name with the I2C bus number and address (e.g. 'imx219 0-0010').
+ *
+ * - When the sensor exposes multiple subdevs, the model name is
+ * usually followed by a function name, as in the smiapp driver (e.g.
+ * 'jt8ew9 pixel_array 0-0010').
+ *
+ * - The vimc driver names its sensors 'Sensor A' and 'Sensor B'.
+ *
+ * Other schemes probably exist. As a best effort heuristic, use the
+ * part of the entity name before the first space if the name contains
+ * an I2C address, and use the full entity name otherwise.
+ */
+ std::string entityName = entity_->name();
+ std::regex i2cRegex{ " [0-9]+-[0-9a-f]{4}" };
+ std::smatch match;
+
+ if (std::regex_search(entityName, match, i2cRegex))
+ model_ = entityName.substr(0, entityName.find(' '));
+ else
+ model_ = entityName;
+
+ /* Open the subdev. */
ret = subdev_->open();
if (ret < 0)
return ret;
@@ -164,6 +194,16 @@ int CameraSensor::init()
}
/**
+ * \fn CameraSensor::model()
+ * \brief Retrieve the sensor model name
+ *
+ * The sensor model name is a free-formed string that uniquely identifies the
+ * sensor model.
+ *
+ * \return The sensor model name
+ */
+
+/**
* \fn CameraSensor::entity()
* \brief Retrieve the sensor media entity
* \return The sensor media entity
diff --git a/src/libcamera/include/camera_sensor.h b/src/libcamera/include/camera_sensor.h
index 5277f7f7..4524661b 100644
--- a/src/libcamera/include/camera_sensor.h
+++ b/src/libcamera/include/camera_sensor.h
@@ -33,6 +33,7 @@ public:
int init();
+ const std::string &model() const { return model_; }
const MediaEntity *entity() const { return entity_; }
const std::vector<unsigned int> &mbusCodes() const { return mbusCodes_; }
const std::vector<Size> &sizes() const { return sizes_; }
@@ -54,6 +55,7 @@ protected:
private:
const MediaEntity *entity_;
V4L2Subdevice *subdev_;
+ std::string model_;
std::vector<unsigned int> mbusCodes_;
std::vector<Size> sizes_;