[PATCH 1/3] libcamera: v4l2: Support fromEntityName with shared_ptr<MediaDevice>

[Paul Elder]

From: Kieran Bingham <kieran.bingham at ideasonboard.com>

To facilitate expanding the use of a shared_ptr<MediaDevice> in
preference of a raw MediaDevice* pointer, add an additional
implementation for fromEntityName for both of v4l2_videodevice and
v4l2_subdevice to support this type.

Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
---
 include/libcamera/internal/v4l2_subdevice.h   |  2 ++
 include/libcamera/internal/v4l2_videodevice.h |  2 ++
 src/libcamera/v4l2_subdevice.cpp              | 15 +++++++++++++++
 src/libcamera/v4l2_videodevice.cpp            | 15 +++++++++++++++
 4 files changed, 34 insertions(+)

diff --git a/include/libcamera/internal/v4l2_subdevice.h b/include/libcamera/internal/v4l2_subdevice.h
index fa2a4a21eefb..08216cd56bc3 100644
--- a/include/libcamera/internal/v4l2_subdevice.h
+++ b/include/libcamera/internal/v4l2_subdevice.h
@@ -163,6 +163,8 @@ public:
 
 	static std::unique_ptr<V4L2Subdevice>
 	fromEntityName(const MediaDevice *media, const std::string &entity);
+	static std::unique_ptr<V4L2Subdevice>
+	fromEntityName(std::shared_ptr<const MediaDevice>, const std::string &entity);
 
 protected:
 	std::string logPrefix() const override;
diff --git a/include/libcamera/internal/v4l2_videodevice.h b/include/libcamera/internal/v4l2_videodevice.h
index ae6a76cb0209..e35fb11bc99f 100644
--- a/include/libcamera/internal/v4l2_videodevice.h
+++ b/include/libcamera/internal/v4l2_videodevice.h
@@ -228,6 +228,8 @@ public:
 
 	static std::unique_ptr<V4L2VideoDevice>
 	fromEntityName(const MediaDevice *media, const std::string &entity);
+	static std::unique_ptr<V4L2VideoDevice>
+	fromEntityName(std::shared_ptr<const MediaDevice>, const std::string &entity);
 
 	V4L2PixelFormat toV4L2PixelFormat(const PixelFormat &pixelFormat) const;
 
diff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp
index 33279654db8c..13f5316a3fc3 100644
--- a/src/libcamera/v4l2_subdevice.cpp
+++ b/src/libcamera/v4l2_subdevice.cpp
@@ -1766,6 +1766,21 @@ V4L2Subdevice::fromEntityName(const MediaDevice *media,
 	return std::make_unique<V4L2Subdevice>(mediaEntity);
 }
 
+/**
+ * \brief Create a new video subdevice instance from \a entity in media device
+ * \a media
+ * \param[in] media The media device where the entity is registered
+ * \param[in] entity The media entity name
+ *
+ * \return A newly created V4L2Subdevice on success, nullptr otherwise
+ */
+std::unique_ptr<V4L2Subdevice>
+V4L2Subdevice::fromEntityName(std::shared_ptr<const MediaDevice> media,
+			      const std::string &entity)
+{
+	return fromEntityName(media.get(), entity);
+}
+
 std::string V4L2Subdevice::logPrefix() const
 {
 	return "'" + entity_->name() + "'";
diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp
index f5b3fa09d9a0..ce7be7deb91f 100644
--- a/src/libcamera/v4l2_videodevice.cpp
+++ b/src/libcamera/v4l2_videodevice.cpp
@@ -2109,6 +2109,21 @@ V4L2VideoDevice::fromEntityName(const MediaDevice *media,
 	return std::make_unique<V4L2VideoDevice>(mediaEntity);
 }
 
+/**
+ * \brief Create a new video device instance from \a entity in media device
+ * \a media
+ * \param[in] media The media device where the entity is registered
+ * \param[in] entity The media entity name
+ *
+ * \return A newly created V4L2VideoDevice on success, nullptr otherwise
+ */
+std::unique_ptr<V4L2VideoDevice>
+V4L2VideoDevice::fromEntityName(std::shared_ptr<const MediaDevice> media,
+				const std::string &entity)
+{
+	return fromEntityName(media.get(), entity);
+}
+
 /**
  * \brief Convert \a PixelFormat to a V4L2PixelFormat supported by the device
  * \param[in] pixelFormat The PixelFormat to convert
-- 
2.47.2