diff options
| -rw-r--r-- | src/libcamera/include/v4l2_device.h | 4 | ||||
| -rw-r--r-- | src/libcamera/v4l2_device.cpp | 22 |
2 files changed, 26 insertions, 0 deletions
diff --git a/src/libcamera/include/v4l2_device.h b/src/libcamera/include/v4l2_device.h index 258deee8..b4b3cd5c 100644 --- a/src/libcamera/include/v4l2_device.h +++ b/src/libcamera/include/v4l2_device.h @@ -22,6 +22,7 @@ namespace libcamera { class Buffer; class BufferPool; class EventNotifier; +class MediaDevice; class MediaEntity; struct V4L2Capability final : v4l2_capability { @@ -136,6 +137,9 @@ public: int streamOn(); int streamOff(); + static V4L2Device *fromEntityName(const MediaDevice *media, + const std::string &entity); + protected: std::string logPrefix() const; diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp index 93d81517..4cc4a6d6 100644 --- a/src/libcamera/v4l2_device.cpp +++ b/src/libcamera/v4l2_device.cpp @@ -19,6 +19,7 @@ #include <libcamera/event_notifier.h> #include "log.h" +#include "media_device.h" #include "media_object.h" #include "v4l2_device.h" @@ -928,4 +929,25 @@ int V4L2Device::streamOff() return 0; } +/** + * \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 + * + * Releasing memory of the newly created instance is responsibility of the + * caller of this function. + * + * \return A newly created V4L2Device on success, nullptr otherwise + */ +V4L2Device *V4L2Device::fromEntityName(const MediaDevice *media, + const std::string &entity) +{ + MediaEntity *mediaEntity = media->getEntityByName(entity); + if (!mediaEntity) + return nullptr; + + return new V4L2Device(mediaEntity); +} + } /* namespace libcamera */ |