libcamera: v4l2_controls: Remove V4L2ControlList class

The V4L2ControlList class only provides a convenience constructor for
the ControlList, which can easily be moved to the ControlList class and
may benefit it later (to construct a ControlList from controls supported
by a camera). Move the constructor and remove V4L2ControlList.

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

include/libcamera/controls.h

@@ -170,6 +170,7 @@ private:
 
 public:
 	ControlList(const ControlIdMap &idmap, ControlValidator *validator = nullptr);
+	ControlList(const ControlInfoMap &info, ControlValidator *validator = nullptr);
 
 	using iterator = ControlListMap::iterator;
 	using const_iterator = ControlListMap::const_iterator;

src/ipa/rkisp1/rkisp1.cpp

@@ -212,7 +212,7 @@ void IPARkISP1::setControls(unsigned int frame)
 	IPAOperationData op;
 	op.operation = RKISP1_IPA_ACTION_V4L2_SET;
 
-	V4L2ControlList ctrls(ctrls_);
+	ControlList ctrls(ctrls_);
 	ctrls.set(V4L2_CID_EXPOSURE, static_cast<int32_t>(exposure_));
 	ctrls.set(V4L2_CID_ANALOGUE_GAIN, static_cast<int32_t>(gain_));
 	op.controls.push_back(ctrls);

src/libcamera/controls.cpp

@@ -561,6 +561,16 @@ ControlList::ControlList(const ControlIdMap &idmap, ControlValidator *validator)
 {
 }
 
+/**
+ * \brief Construct a ControlList with the idmap of a control info map
+ * \param[in] info The ControlInfoMap for the control list target object
+ * \param[in] validator The validator (may be null)
+ */
+ControlList::ControlList(const ControlInfoMap &info, ControlValidator *validator)
+	: validator_(validator), idmap_(&info.idmap())
+{
+}
+
 /**
  * \typedef ControlList::iterator
  * \brief Iterator for the controls contained within the list

src/libcamera/include/v4l2_controls.h

@@ -8,11 +8,6 @@
 #ifndef __LIBCAMERA_V4L2_CONTROLS_H__
 #define __LIBCAMERA_V4L2_CONTROLS_H__
 
-#include <map>
-#include <stdint.h>
-#include <string>
-#include <vector>
-
 #include <linux/videodev2.h>
 
 #include <libcamera/controls.h>
@@ -31,15 +26,6 @@ public:
 	V4L2ControlRange(const struct v4l2_query_ext_ctrl &ctrl);
 };
 
-class V4L2ControlList : public ControlList
-{
-public:
-	V4L2ControlList(const ControlInfoMap &info)
-		: ControlList(info.idmap())
-	{
-	}
-};
-
 } /* namespace libcamera */
 
 #endif /* __LIBCAMERA_V4L2_CONTROLS_H__ */

src/libcamera/pipeline/ipu3/ipu3.cpp

@@ -604,7 +604,7 @@ int PipelineHandlerIPU3::configure(Camera *camera, CameraConfiguration *c)
 		return ret;
 
 	/* Apply the "pipe_mode" control to the ImgU subdevice. */
-	V4L2ControlList ctrls(imgu->imgu_->controls());
+	ControlList ctrls(imgu->imgu_->controls());
 	ctrls.set(V4L2_CID_IPU3_PIPE_MODE,
 		  static_cast<int32_t>(vfStream->active_ ? IPU3PipeModeVideo :
 				       IPU3PipeModeStillCapture));

src/libcamera/pipeline/uvcvideo.cpp

@@ -228,7 +228,7 @@ void PipelineHandlerUVC::stop(Camera *camera)
 
 int PipelineHandlerUVC::processControls(UVCCameraData *data, Request *request)
 {
-	V4L2ControlList controls(data->video_->controls());
+	ControlList controls(data->video_->controls());
 
 	for (auto it : request->controls()) {
 		const ControlId &id = *it.first;

src/libcamera/pipeline/vimc.cpp

@@ -279,7 +279,7 @@ void PipelineHandlerVimc::stop(Camera *camera)
 
 int PipelineHandlerVimc::processControls(VimcCameraData *data, Request *request)
 {
-	V4L2ControlList controls(data->sensor_->controls());
+	ControlList controls(data->sensor_->controls());
 
 	for (auto it : request->controls()) {
 		const ControlId &id = *it.first;

src/libcamera/v4l2_controls.cpp

@@ -126,24 +126,4 @@ V4L2ControlRange::V4L2ControlRange(const struct v4l2_query_ext_ctrl &ctrl)
 						     static_cast<int32_t>(ctrl.maximum)));
 }
 
-/**
- * \class V4L2ControlList
- * \brief A list of controls for a V4L2 device
- *
- * This class specialises the ControList class for use with V4L2 devices. It
- * offers a convenience API to create a ControlList from a ControlInfoMap.
- *
- * V4L2ControlList allows easy construction of a ControlList containing V4L2
- * controls for a device. It can be used to construct the list of controls
- * passed to the V4L2Device::getControls() and V4L2Device::setControls()
- * methods. The class should however not be used in place of ControlList in
- * APIs.
- */
-
-/**
- * \fn V4L2ControlList::V4L2ControlList(const ControlInfoMap &info)
- * \brief Construct a V4L2ControlList associated with a V4L2 device
- * \param[in] info The V4L2 device control info map
- */
-
 } /* namespace libcamera */

test/v4l2_videodevice/controls.cpp

@@ -46,7 +46,7 @@ protected:
 		const ControlRange &saturation = info.find(V4L2_CID_SATURATION)->second;
 
 		/* Test getting controls. */
-		V4L2ControlList ctrls(info);
+		ControlList ctrls(info);
 		ctrls.set(V4L2_CID_BRIGHTNESS, -1);
 		ctrls.set(V4L2_CID_CONTRAST, -1);
 		ctrls.set(V4L2_CID_SATURATION, -1);