ioctl VIDIOC_ENUM_DV_TIMINGS &manvol; VIDIOC_ENUM_DV_TIMINGS Enumerate supported Digital Video timings int ioctl int fd int request struct v4l2_enum_dv_timings *argp fd &fd; request VIDIOC_ENUM_DV_TIMINGS argp This is an experimental interface and may change in the future. While some DV receivers or transmitters support a wide range of timings, others support only a limited number of timings. With this ioctl applications can enumerate a list of known supported timings. Call &VIDIOC-DV-TIMINGS-CAP; to check if it also supports other standards or even custom timings that are not in this list. To query the available timings, applications initialize the index field and zero the reserved array of &v4l2-enum-dv-timings; and call the VIDIOC_ENUM_DV_TIMINGS ioctl with a pointer to this structure. Drivers fill the rest of the structure or return an &EINVAL; when the index is out of bounds. To enumerate all supported DV timings, applications shall begin at index zero, incrementing by one until the driver returns EINVAL. Note that drivers may enumerate a different set of DV timings after switching the video input or output. &cs-str; __u32 index Number of the DV timings, set by the application. __u32 reserved[3] Reserved for future extensions. Drivers must set the array to zero. &v4l2-dv-timings; timings The timings. &return-value; EINVAL The &v4l2-enum-dv-timings; index is out of bounds.