libcamera: v4l2_videodevice: Expose the device capabilities

Add a caps() function that exposes the V4L2 capabilities for the device.
This is useful for generic code that can't hardcode any a priori
knowledge of the device, such as in a simple pipeline handler.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp
index eb33a68e..e764268e 100644
--- a/src/libcamera/v4l2_videodevice.cpp
+++ b/src/libcamera/v4l2_videodevice.cpp
@@ -759,6 +759,12 @@ void V4L2VideoDevice::close()
  * \return The string containing the device location
  */
 
+/**
+ * \fn V4L2VideoDevice::caps()
+ * \brief Retrieve the device V4L2 capabilities
+ * \return The device V4L2 capabilities
+ */
+
 std::string V4L2VideoDevice::logPrefix() const
 {
 	return deviceNode() + (V4L2_TYPE_IS_OUTPUT(bufferType_) ? "[out]" : "[cap]");