libcamera: v4l2_controls: Derive V4L2ControlInfoMap from ControlInfoMap

Replace the std::map<> used as the base type for V4L2ControlInfoMap by
ControlInfoMap, which is an alias for an std::unsorted_map<> with the
same key and value types. This shortens the code.

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

3 files changed, 23 insertions, 23 deletions

diff --git a/src/libcamera/include/v4l2_controls.h b/src/libcamera/include/v4l2_controls.h
index 7d3528b0..c427b845 100644
--- a/src/libcamera/include/v4l2_controls.h
+++ b/src/libcamera/include/v4l2_controls.h
@@ -31,27 +31,27 @@ public:
 	V4L2ControlRange(const struct v4l2_query_ext_ctrl &ctrl);
 };
 
-class V4L2ControlInfoMap : private std::map<const ControlId *, ControlRange>
+class V4L2ControlInfoMap : private ControlInfoMap
 {
 public:
-	V4L2ControlInfoMap &operator=(std::map<const ControlId *, ControlRange> &&info);
-
-	using std::map<const ControlId *, ControlRange>::key_type;
-	using std::map<const ControlId *, ControlRange>::mapped_type;
-	using std::map<const ControlId *, ControlRange>::value_type;
-	using std::map<const ControlId *, ControlRange>::size_type;
-	using std::map<const ControlId *, ControlRange>::iterator;
-	using std::map<const ControlId *, ControlRange>::const_iterator;
-
-	using std::map<const ControlId *, ControlRange>::begin;
-	using std::map<const ControlId *, ControlRange>::cbegin;
-	using std::map<const ControlId *, ControlRange>::end;
-	using std::map<const ControlId *, ControlRange>::cend;
-	using std::map<const ControlId *, ControlRange>::at;
-	using std::map<const ControlId *, ControlRange>::empty;
-	using std::map<const ControlId *, ControlRange>::size;
-	using std::map<const ControlId *, ControlRange>::count;
-	using std::map<const ControlId *, ControlRange>::find;
+	V4L2ControlInfoMap &operator=(ControlInfoMap &&info);
+
+	using ControlInfoMap::key_type;
+	using ControlInfoMap::mapped_type;
+	using ControlInfoMap::value_type;
+	using ControlInfoMap::size_type;
+	using ControlInfoMap::iterator;
+	using ControlInfoMap::const_iterator;
+
+	using ControlInfoMap::begin;
+	using ControlInfoMap::cbegin;
+	using ControlInfoMap::end;
+	using ControlInfoMap::cend;
+	using ControlInfoMap::at;
+	using ControlInfoMap::empty;
+	using ControlInfoMap::size;
+	using ControlInfoMap::count;
+	using ControlInfoMap::find;
 
 	mapped_type &at(unsigned int key);
 	const mapped_type &at(unsigned int key) const;
diff --git a/src/libcamera/v4l2_controls.cpp b/src/libcamera/v4l2_controls.cpp
index 63416b9e..33816571 100644
--- a/src/libcamera/v4l2_controls.cpp
+++ b/src/libcamera/v4l2_controls.cpp
@@ -132,7 +132,7 @@ V4L2ControlRange::V4L2ControlRange(const struct v4l2_query_ext_ctrl &ctrl)
  */
 
 /**
- * \brief Move assignment operator from plain map
+ * \brief Move assignment operator from a ControlInfoMap
  * \param[in] info The control info map
  *
  * Populate the map by replacing its contents with those of \a info using move
@@ -142,9 +142,9 @@ V4L2ControlRange::V4L2ControlRange(const struct v4l2_query_ext_ctrl &ctrl)
  *
  * \return The populated V4L2ControlInfoMap
  */
-V4L2ControlInfoMap &V4L2ControlInfoMap::operator=(std::map<const ControlId *, ControlRange> &&info)
+V4L2ControlInfoMap &V4L2ControlInfoMap::operator=(ControlInfoMap &&info)
 {
-	std::map<const ControlId *, ControlRange>::operator=(std::move(info));
+	ControlInfoMap::operator=(std::move(info));
 
 	idmap_.clear();
 	for (const auto &ctrl : *this)
diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
index 47999e70..06155eb5 100644
--- a/src/libcamera/v4l2_device.cpp
+++ b/src/libcamera/v4l2_device.cpp
@@ -342,7 +342,7 @@ int V4L2Device::ioctl(unsigned long request, void *argp)
  */
 void V4L2Device::listControls()
 {
-	std::map<const ControlId *, ControlRange> ctrls;
+	ControlInfoMap ctrls;
 	struct v4l2_query_ext_ctrl ctrl = {};
 
 	/* \todo Add support for menu and compound controls. */