9/13/2023 0 Comments Uvc driver macHardcoded in the application or queried using other ways such as by parsing the In order to make such a request the UVC unit ID of the control’s extension unitĪnd the control selector need to be known. Purposes, firmware upload, or accessing binary controls, a second mechanism toĪccess XU controls is provided in the form of a driver-specific ioctl, namelyĪ call to this ioctl allows applications to send queries to the UVC driver thatĭirectly map to the low-level UVC control requests. This is no longer necessary as newer uvcvideo versions query the informationįor details on the UVCIOC_CTRL_MAP ioctl please refer to the section titledįor applications that need to access XU controls directly, e.g. Previous driver versions (before 0.2.0) required another ioctl to be usedīeforehand (UVCIOC_CTRL_ADD) to pass XU control information to the UVC driver. The ioctl used to create these control mappings is called UVCIOC_CTRL_MAP. Triggers a read or write of the associated XU control. However, reading or writing of such a V4L2 controls the stock controls, such asīrightness, contrast, etc.). Such controls appear andįunction exactly like normal V4L2 controls (i.e. Ranges thereof to be mapped to new V4L2 controls. These allow for individual XU controls or byte The UVC driver provides an API for user space applications to define so-calledĬontrol mappings at runtime.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |