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authorJacopo Mondi <jacopo@jmondi.org>2020-03-04 17:57:02 +0100
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-03-23 16:45:25 +0200
commit3786b6c84bbfa91864bfbd16fa8cad575e4247e7 (patch)
treee7c075d57bfdc99b0158fca4f3abc7e89ecede68 /src
parent0aa8e0977591ed0868262ca910ab12c46a46d39c (diff)
libcamera: v4l2_device: Support reading U8 array controls
Add support to retrieve the value of array controls of type V4L2_CTRL_TYPE_U8. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Diffstat (limited to 'src')
-rw-r--r--src/libcamera/v4l2_device.cpp27
1 files changed, 26 insertions, 1 deletions
diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
index 2139e98b..3c91eb3f 100644
--- a/src/libcamera/v4l2_device.cpp
+++ b/src/libcamera/v4l2_device.cpp
@@ -176,7 +176,7 @@ int V4L2Device::getControls(ControlList *ctrls)
memset(v4l2Ctrls, 0, sizeof(v4l2Ctrls));
unsigned int i = 0;
- for (const auto &ctrl : *ctrls) {
+ for (auto &ctrl : *ctrls) {
unsigned int id = ctrl.first;
const auto iter = controls_.find(id);
if (iter == controls_.end()) {
@@ -185,6 +185,31 @@ int V4L2Device::getControls(ControlList *ctrls)
return -EINVAL;
}
+ const struct v4l2_query_ext_ctrl &info = controlInfo_[id];
+ ControlValue &value = ctrl.second;
+
+ if (info.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD) {
+ ControlType type;
+
+ switch (info.type) {
+ case V4L2_CTRL_TYPE_U8:
+ type = ControlTypeByte;
+ break;
+
+ default:
+ LOG(V4L2, Error)
+ << "Unsupported payload control type "
+ << info.type;
+ return -EINVAL;
+ }
+
+ value.reserve(type, true, info.elems);
+ Span<uint8_t> data = value.data();
+
+ v4l2Ctrls[i].p_u8 = data.data();
+ v4l2Ctrls[i].size = data.size();
+ }
+
v4l2Ctrls[i].id = id;
i++;
}