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-rw-r--r--src/libcamera/include/media_device.h10
-rw-r--r--src/libcamera/media_device.cpp75
2 files changed, 53 insertions, 32 deletions
diff --git a/src/libcamera/include/media_device.h b/src/libcamera/include/media_device.h
index bca7c9a1..74a67c81 100644
--- a/src/libcamera/include/media_device.h
+++ b/src/libcamera/include/media_device.h
@@ -28,6 +28,7 @@ public:
void close();
int populate();
+ bool valid() const { return valid_; }
const std::string driver() const { return driver_; }
const std::string devnode() const { return devnode_; }
@@ -37,18 +38,19 @@ private:
std::string driver_;
std::string devnode_;
int fd_;
+ bool valid_;
std::map<unsigned int, MediaObject *> objects_;
MediaObject *object(unsigned int id);
- int addObject(MediaObject *obj);
+ bool addObject(MediaObject *obj);
void clear();
std::vector<MediaEntity *> entities_;
MediaEntity *getEntityByName(const std::string &name);
- void populateEntities(const struct media_v2_topology &topology);
- int populatePads(const struct media_v2_topology &topology);
- int populateLinks(const struct media_v2_topology &topology);
+ bool populateEntities(const struct media_v2_topology &topology);
+ bool populatePads(const struct media_v2_topology &topology);
+ bool populateLinks(const struct media_v2_topology &topology);
};
} /* namespace libcamera */
diff --git a/src/libcamera/media_device.cpp b/src/libcamera/media_device.cpp
index d9a5196a..fd5a3174 100644
--- a/src/libcamera/media_device.cpp
+++ b/src/libcamera/media_device.cpp
@@ -56,7 +56,7 @@ namespace libcamera {
* \param devnode The media device node path
*/
MediaDevice::MediaDevice(const std::string &devnode)
- : devnode_(devnode), fd_(-1)
+ : devnode_(devnode), fd_(-1), valid_(false)
{
}
@@ -99,6 +99,7 @@ void MediaDevice::clear()
objects_.clear();
entities_.clear();
+ valid_ = false;
}
/**
@@ -163,18 +164,18 @@ void MediaDevice::close()
* Add a new object to the global objects pool and fail if the object
* has already been registered.
*/
-int MediaDevice::addObject(MediaObject *obj)
+bool MediaDevice::addObject(MediaObject *obj)
{
if (objects_.find(obj->id()) != objects_.end()) {
LOG(Error) << "Element with id " << obj->id()
<< " already enumerated.";
- return -EEXIST;
+ return false;
}
objects_[obj->id()] = obj;
- return 0;
+ return true;
}
/*
@@ -201,7 +202,7 @@ MediaEntity *MediaDevice::getEntityByName(const std::string &name)
return nullptr;
}
-int MediaDevice::populateLinks(const struct media_v2_topology &topology)
+bool MediaDevice::populateLinks(const struct media_v2_topology &topology)
{
media_v2_link *mediaLinks = reinterpret_cast<media_v2_link *>
(topology.ptr_links);
@@ -222,7 +223,7 @@ int MediaDevice::populateLinks(const struct media_v2_topology &topology)
if (!source) {
LOG(Error) << "Failed to find pad with id: "
<< source_id;
- return -ENODEV;
+ return false;
}
unsigned int sink_id = mediaLinks[i].sink_id;
@@ -231,20 +232,23 @@ int MediaDevice::populateLinks(const struct media_v2_topology &topology)
if (!sink) {
LOG(Error) << "Failed to find pad with id: "
<< sink_id;
- return -ENODEV;
+ return false;
}
MediaLink *link = new MediaLink(&mediaLinks[i], source, sink);
+ if (!addObject(link)) {
+ delete link;
+ return false;
+ }
+
source->addLink(link);
sink->addLink(link);
-
- addObject(link);
}
- return 0;
+ return true;
}
-int MediaDevice::populatePads(const struct media_v2_topology &topology)
+bool MediaDevice::populatePads(const struct media_v2_topology &topology)
{
media_v2_pad *mediaPads = reinterpret_cast<media_v2_pad *>
(topology.ptr_pads);
@@ -258,16 +262,19 @@ int MediaDevice::populatePads(const struct media_v2_topology &topology)
if (!mediaEntity) {
LOG(Error) << "Failed to find entity with id: "
<< entity_id;
- return -ENODEV;
+ return false;
}
MediaPad *pad = new MediaPad(&mediaPads[i], mediaEntity);
- mediaEntity->addPad(pad);
+ if (!addObject(pad)) {
+ delete pad;
+ return false;
+ }
- addObject(pad);
+ mediaEntity->addPad(pad);
}
- return 0;
+ return true;
}
/*
@@ -275,17 +282,22 @@ int MediaDevice::populatePads(const struct media_v2_topology &topology)
* reference in the MediaObject global pool and in the global vector of
* entities.
*/
-void MediaDevice::populateEntities(const struct media_v2_topology &topology)
+bool MediaDevice::populateEntities(const struct media_v2_topology &topology)
{
media_v2_entity *mediaEntities = reinterpret_cast<media_v2_entity *>
(topology.ptr_entities);
for (unsigned int i = 0; i < topology.num_entities; ++i) {
MediaEntity *entity = new MediaEntity(&mediaEntities[i]);
+ if (!addObject(entity)) {
+ delete entity;
+ return false;
+ }
- addObject(entity);
entities_.push_back(entity);
}
+
+ return true;
}
/**
@@ -311,6 +323,8 @@ int MediaDevice::populate()
__u64 version = -1;
int ret;
+ clear();
+
/*
* Keep calling G_TOPOLOGY until the version number stays stable.
*/
@@ -343,25 +357,30 @@ int MediaDevice::populate()
}
/* Populate entities, pads and links. */
- populateEntities(topology);
-
- ret = populatePads(topology);
- if (ret)
- goto error_free_objs;
-
- ret = populateLinks(topology);
-error_free_objs:
- if (ret)
- clear();
+ if (populateEntities(topology) &&
+ populatePads(topology) &&
+ populateLinks(topology))
+ valid_ = true;
delete[] links;
delete[] ents;
delete[] pads;
- return ret;
+ if (!valid_) {
+ clear();
+ return -EINVAL;
+ }
+
+ return 0;
}
/**
+ * \fn MediaDevice::valid()
+ * \brief Query whether the media graph is valid
+ * \return true if the media graph is valid, false otherwise
+ */
+
+/**
* \var MediaDevice::objects_
* \brief Global map of media objects (entities, pads, links) keyed by their
* object id.