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-rw-r--r--src/libcamera/include/media_object.h7
-rw-r--r--src/libcamera/media_device.cpp4
-rw-r--r--src/libcamera/media_object.cpp33
3 files changed, 32 insertions, 12 deletions
diff --git a/src/libcamera/include/media_object.h b/src/libcamera/include/media_object.h
index 04b9a890..b2c3d8e9 100644
--- a/src/libcamera/include/media_object.h
+++ b/src/libcamera/include/media_object.h
@@ -21,14 +21,17 @@ class MediaPad;
class MediaObject
{
public:
+ MediaDevice *device() { return dev_; }
unsigned int id() const { return id_; }
protected:
friend class MediaDevice;
- MediaObject(unsigned int id) : id_(id) { }
+ MediaObject(MediaDevice *dev, unsigned int id) :
+ dev_(dev), id_(id) { }
virtual ~MediaObject() { }
+ MediaDevice *dev_;
unsigned int id_;
};
@@ -93,7 +96,7 @@ public:
private:
friend class MediaDevice;
- MediaEntity(const struct media_v2_entity *entity,
+ MediaEntity(MediaDevice *dev, const struct media_v2_entity *entity,
unsigned int major = 0, unsigned int minor = 0);
MediaEntity(const MediaEntity &) = delete;
~MediaEntity();
diff --git a/src/libcamera/media_device.cpp b/src/libcamera/media_device.cpp
index cf4ff901..b0d10edb 100644
--- a/src/libcamera/media_device.cpp
+++ b/src/libcamera/media_device.cpp
@@ -430,11 +430,11 @@ bool MediaDevice::populateEntities(const struct media_v2_topology &topology)
MediaEntity *entity;
if (iface)
- entity = new MediaEntity(&mediaEntities[i],
+ entity = new MediaEntity(this, &mediaEntities[i],
iface->devnode.major,
iface->devnode.minor);
else
- entity = new MediaEntity(&mediaEntities[i]);
+ entity = new MediaEntity(this, &mediaEntities[i]);
if (!addObject(entity)) {
delete entity;
diff --git a/src/libcamera/media_object.cpp b/src/libcamera/media_object.cpp
index 06a8d642..4ff9620d 100644
--- a/src/libcamera/media_object.cpp
+++ b/src/libcamera/media_object.cpp
@@ -42,16 +42,20 @@ namespace libcamera {
* \class MediaObject
* \brief Base class for all media objects
*
- * MediaObject is an abstract base class for all media objects in the media
- * graph. Every media graph object is identified by an id unique in the media
- * device context, and this base class provides that.
+ * MediaObject is an abstract base class for all media objects in the
+ * media graph. Each object is identified by a reference to the media
+ * device it belongs to and a unique id within that media device.
+ * This base class provide helpers to media objects to keep track of
+ * these identifiers.
*
* \sa MediaEntity, MediaPad, MediaLink
*/
/**
* \fn MediaObject::MediaObject()
- * \brief Construct a MediaObject with \a id
+ * \brief Construct a MediaObject part of the MediaDevice \a dev,
+ * identified by the \a id unique within the device
+ * \param dev The media device this object belongs to
* \param id The media object id
*
* The caller shall ensure unicity of the object id in the media device context.
@@ -59,12 +63,23 @@ namespace libcamera {
*/
/**
+ * \fn MediaObject::device()
+ * \brief Retrieve the media device the media object belongs to
+ * \return The MediaDevice
+ */
+
+/**
* \fn MediaObject::id()
* \brief Retrieve the media object id
* \return The media object id
*/
/**
+ * \var MediaObject::dev_
+ * \brief The media device the media object belongs to
+ */
+
+/**
* \var MediaObject::id_
* \brief The media object id
*/
@@ -88,7 +103,7 @@ namespace libcamera {
*/
MediaLink::MediaLink(const struct media_v2_link *link, MediaPad *source,
MediaPad *sink)
- : MediaObject(link->id), source_(source),
+ : MediaObject(source->device(), link->id), source_(source),
sink_(sink), flags_(link->flags)
{
}
@@ -139,7 +154,7 @@ MediaLink::MediaLink(const struct media_v2_link *link, MediaPad *source,
* \param entity The entity the pad belongs to
*/
MediaPad::MediaPad(const struct media_v2_pad *pad, MediaEntity *entity)
- : MediaObject(pad->id), index_(pad->index), entity_(entity),
+ : MediaObject(entity->device(), pad->id), index_(pad->index), entity_(entity),
flags_(pad->flags)
{
}
@@ -283,13 +298,15 @@ int MediaEntity::setDeviceNode(const std::string &devnode)
/**
* \brief Construct a MediaEntity
+ * \param dev The media device this entity belongs to
* \param entity The media entity kernel data
* \param major The major number of the entity associated interface
* \param minor The minor number of the entity associated interface
*/
-MediaEntity::MediaEntity(const struct media_v2_entity *entity,
+MediaEntity::MediaEntity(MediaDevice *dev,
+ const struct media_v2_entity *entity,
unsigned int major, unsigned int minor)
- : MediaObject(entity->id), name_(entity->name),
+ : MediaObject(dev, entity->id), name_(entity->name),
major_(major), minor_(minor)
{
}