Documentation/userspace-api/media/v4l/pixfmt-meta-sensor-data.rst
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.. _v4l2-meta-fmt-sensor-data:
V4L2_META_FMT_SENSOR_DATA ('SENS')
Sensor Ancillary Metadata
This format describes ancillary data generated by a camera sensor and
transmitted over a stream on the camera bus. Sensor vendors generally have their
own custom format for this ancillary data. Some vendors follow a generic
CSI-2/SMIA embedded data format as described in the CSI-2 specification. <https://mipi.org/specifications/csi-2>_
The size of the embedded buffer is defined as a single line with a pixel width
width specified in bytes. This is obtained by a call to the
:c:type:VIDIOC_SUBDEV_G_FMT ioctl on the sensor subdevice where the pad
field in :c:type:v4l2_subdev_format is set to 1. Note that this size is fixed
and cannot be modified with a call to :c:type:VIDIOC_SUBDEV_S_FMT.