From 3556ae95ecb049eb7befb4c2115aa1646c5b4daf Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Thu, 27 Feb 2020 01:05:59 +0200
Subject: libcamera: controls: Allow passing an std::initializer list to set()

For array controls, the ControlList::set() function takes a value as a
type convertible to Span<T>. This allows passing an std::array or an
std::vector in addition to an explicit Span, but doesn't accept an
std::initializer list as Span has no constructor that takes an
initializer list. Callers are thus forced to create temporary objects
explicitly, which isn't nice.

Fix the issue by providing a ControlList::set() function that takes an
std::initializer_list, and convert it to a Span internally.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 include/libcamera/controls.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'include')

diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h
index 1e24ae30..2102d571 100644
--- a/include/libcamera/controls.h
+++ b/include/libcamera/controls.h
@@ -335,6 +335,16 @@ public:
 		val->set<T>(value);
 	}
 
+	template<typename T, typename V>
+	void set(const Control<T> &ctrl, const std::initializer_list<V> &value)
+	{
+		ControlValue *val = find(ctrl.id());
+		if (!val)
+			return;
+
+		val->set<T>(Span<const typename std::remove_cv_t<V>>{ value.begin(), value.size() });
+	}
+
 	const ControlValue &get(unsigned int id) const;
 	void set(unsigned int id, const ControlValue &value);
 
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