From d522ad2549dfbd494c4f47222951522abecaea01 Mon Sep 17 00:00:00 2001
From: David Plowman <david.plowman@raspberrypi.com>
Date: Mon, 7 Sep 2020 08:15:57 +0100
Subject: libcamera: Allow access to v4l2_query_ext_ctrl structure for a V4L2
control
The V4L2Device::controlInfo method simply returns a pointer to the
v4l2_query_ext_ctrl structure for the given control, which has already
been retrieved and stored.
Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
src/libcamera/v4l2_device.cpp | 15 +++++++++++++++
1 file changed, 15 insertions(+)
(limited to 'src')
diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
index 65830d41..31d4dad0 100644
--- a/src/libcamera/v4l2_device.cpp
+++ b/src/libcamera/v4l2_device.cpp
@@ -353,6 +353,21 @@ int V4L2Device::setControls(ControlList *ctrls)
return ret;
}
+/**
+ * \brief Retrieve the v4l2_query_ext_ctrl information for the given control
+ * \param[in] id The V4L2 control id
+ * \return A pointer to the v4l2_query_ext_ctrl structure for the given
+ * control, or a null pointer if not found
+ */
+const struct v4l2_query_ext_ctrl *V4L2Device::controlInfo(uint32_t id) const
+{
+ const auto it = controlInfo_.find(id);
+ if (it == controlInfo_.end())
+ return nullptr;
+
+ return &it->second;
+}
+
/**
* \brief Retrieve the device path in sysfs
*
--
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