libcamera: ipu3: imgu: Use unique_ptr for video and subdevices

Instead of manually deleting the video and subdevices in the destructor
use std::unique_ptr.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

2 files changed, 19 insertions, 31 deletions

diff --git a/src/libcamera/pipeline/ipu3/imgu.cpp b/src/libcamera/pipeline/ipu3/imgu.cpp
index c4bb6100..d7f4173d 100644
--- a/src/libcamera/pipeline/ipu3/imgu.cpp
+++ b/src/libcamera/pipeline/ipu3/imgu.cpp
@@ -44,28 +44,29 @@ int ImgUDevice::init(MediaDevice *media, unsigned int index)
 	 * by the match() function: no need to check for newly created
 	 * video devices and subdevice validity here.
 	 */
-	imgu_ = V4L2Subdevice::fromEntityName(media, name_);
+	imgu_.reset(V4L2Subdevice::fromEntityName(media, name_));
 	ret = imgu_->open();
 	if (ret)
 		return ret;
 
-	input_ = V4L2VideoDevice::fromEntityName(media, name_ + " input");
+	input_.reset(V4L2VideoDevice::fromEntityName(media, name_ + " input"));
 	ret = input_->open();
 	if (ret)
 		return ret;
 
-	output_ = V4L2VideoDevice::fromEntityName(media, name_ + " output");
+	output_.reset(V4L2VideoDevice::fromEntityName(media,
+						      name_ + " output"));
 	ret = output_->open();
 	if (ret)
 		return ret;
 
-	viewfinder_ = V4L2VideoDevice::fromEntityName(media,
-						      name_ + " viewfinder");
+	viewfinder_.reset(V4L2VideoDevice::fromEntityName(media,
+							  name_ + " viewfinder"));
 	ret = viewfinder_->open();
 	if (ret)
 		return ret;
 
-	stat_ = V4L2VideoDevice::fromEntityName(media, name_ + " 3a stat");
+	stat_.reset(V4L2VideoDevice::fromEntityName(media, name_ + " 3a stat"));
 	ret = stat_->open();
 	if (ret)
 		return ret;
@@ -150,7 +151,7 @@ int ImgUDevice::configureVideoDevice(V4L2VideoDevice *dev, unsigned int pad,
 		return ret;
 
 	/* No need to apply format to the stat node. */
-	if (dev == stat_)
+	if (dev == stat_.get())
 		return 0;
 
 	*outputFormat = {};
@@ -162,7 +163,7 @@ int ImgUDevice::configureVideoDevice(V4L2VideoDevice *dev, unsigned int pad,
 	if (ret)
 		return ret;
 
-	const char *name = dev == output_ ? "output" : "viewfinder";
+	const char *name = dev == output_.get() ? "output" : "viewfinder";
 	LOG(IPU3, Debug) << "ImgU " << name << " format = "
 			 << outputFormat->toString();
 
diff --git a/src/libcamera/pipeline/ipu3/imgu.h b/src/libcamera/pipeline/ipu3/imgu.h
index 66146911..5c124af2 100644
--- a/src/libcamera/pipeline/ipu3/imgu.h
+++ b/src/libcamera/pipeline/ipu3/imgu.h
@@ -7,6 +7,7 @@
 #ifndef __LIBCAMERA_PIPELINE_IPU3_IMGU_H__
 #define __LIBCAMERA_PIPELINE_IPU3_IMGU_H__
 
+#include <memory>
 #include <string>
 
 #include "libcamera/internal/v4l2_subdevice.h"
@@ -22,21 +23,6 @@ struct StreamConfiguration;
 class ImgUDevice
 {
 public:
-	ImgUDevice()
-		: imgu_(nullptr), input_(nullptr), output_(nullptr),
-		  viewfinder_(nullptr), stat_(nullptr)
-	{
-	}
-
-	~ImgUDevice()
-	{
-		delete imgu_;
-		delete input_;
-		delete output_;
-		delete viewfinder_;
-		delete stat_;
-	}
-
 	int init(MediaDevice *media, unsigned int index);
 
 	int configureInput(const Size &size, V4L2DeviceFormat *inputFormat);
@@ -44,21 +30,22 @@ public:
 	int configureOutput(const StreamConfiguration &cfg,
 			    V4L2DeviceFormat *outputFormat)
 	{
-		return configureVideoDevice(output_, PAD_OUTPUT, cfg,
+		return configureVideoDevice(output_.get(), PAD_OUTPUT, cfg,
 					    outputFormat);
 	}
 
 	int configureViewfinder(const StreamConfiguration &cfg,
 				V4L2DeviceFormat *outputFormat)
 	{
-		return configureVideoDevice(viewfinder_, PAD_VF, cfg,
+		return configureVideoDevice(viewfinder_.get(), PAD_VF, cfg,
 					    outputFormat);
 	}
 
 	int configureStat(const StreamConfiguration &cfg,
 			  V4L2DeviceFormat *outputFormat)
 	{
-		return configureVideoDevice(stat_, PAD_STAT, cfg, outputFormat);
+		return configureVideoDevice(stat_.get(), PAD_STAT, cfg,
+					    outputFormat);
 	}
 
 	int allocateBuffers(unsigned int bufferCount);
@@ -69,11 +56,11 @@ public:
 
 	int enableLinks(bool enable);
 
-	V4L2Subdevice *imgu_;
-	V4L2VideoDevice *input_;
-	V4L2VideoDevice *output_;
-	V4L2VideoDevice *viewfinder_;
-	V4L2VideoDevice *stat_;
+	std::unique_ptr<V4L2Subdevice> imgu_;
+	std::unique_ptr<V4L2VideoDevice> input_;
+	std::unique_ptr<V4L2VideoDevice> output_;
+	std::unique_ptr<V4L2VideoDevice> viewfinder_;
+	std::unique_ptr<V4L2VideoDevice> stat_;
 	/* \todo Add param video device for 3A tuning */
 
 private: