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authorNiklas Söderlund <niklas.soderlund@ragnatech.se>2018-12-21 02:45:14 +0100
committerNiklas Söderlund <niklas.soderlund@ragnatech.se>2018-12-31 00:58:23 +0100
commit06e2ac2e2f5798463676f7d46dae7fcb67fc62da (patch)
treef812d81280cb7bcbf58f6c01e251d6746b38a89d
parent4db38e82a371b4a38955f74358b35d646123e928 (diff)
libcamera: device_enumerator: add factory for DeviceEnumerators
Provide a factory for DeviceEnumerator objects. Depending on which libraries are available there will be different ways to enumerate information in the system. This factory hides this from the rest of the library. Currently udev enumeration is the only supported implementation, a sysfs implementation is another method that surely will be added in the future. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
-rw-r--r--src/libcamera/device_enumerator.cpp19
-rw-r--r--src/libcamera/include/device_enumerator.h2
2 files changed, 21 insertions, 0 deletions
diff --git a/src/libcamera/device_enumerator.cpp b/src/libcamera/device_enumerator.cpp
index 8e8b280f..4373fdf0 100644
--- a/src/libcamera/device_enumerator.cpp
+++ b/src/libcamera/device_enumerator.cpp
@@ -121,6 +121,25 @@ bool DeviceMatch::match(const DeviceInfo *info) const
* Enumerator Base
*/
+DeviceEnumerator *DeviceEnumerator::create()
+{
+ DeviceEnumerator *enumerator;
+
+ /* TODO: add compile time checks to only try udev enumerator if libudev is available */
+ enumerator = new DeviceEnumeratorUdev();
+ if (!enumerator->init())
+ return enumerator;
+
+ /*
+ * NOTE: Either udev is not available or initialization of it
+ * failed, use/fallback on sysfs enumerator
+ */
+
+ /* TODO: add a sysfs based enumerator */
+
+ return nullptr;
+}
+
DeviceEnumerator::~DeviceEnumerator()
{
for (DeviceInfo *dev : devices_) {
diff --git a/src/libcamera/include/device_enumerator.h b/src/libcamera/include/device_enumerator.h
index 5348e6cf..24bca0e3 100644
--- a/src/libcamera/include/device_enumerator.h
+++ b/src/libcamera/include/device_enumerator.h
@@ -56,6 +56,8 @@ private:
class DeviceEnumerator
{
public:
+ static DeviceEnumerator *create();
+
virtual ~DeviceEnumerator();
virtual int init() = 0;