acl.himpi.sys_ctl_epoll

hi_s32 hi_mpi_sys_ctl_epoll(hi_s32 epoll_fd, hi_s32 operation, hi_s32 fd, hi_dvpp_epoll_event *event);

ret = acl.himpi.sys_ctl_epoll(epoll_fd, operation, fd, event)

Adds, deletes, or modifies the corresponding media data processing channel for the media data processing epoll instance.

The Atlas 200/300/500 Inference Product does not support this API.

The Atlas Training Series Product does not support this API.

epoll_fd: int, pointer address of the epoll instance handle. The handle must be created in advance by calling acl.himpi.sys_create_epoll.

operation: int, operation type (addition, deletion, or modification). For details, see hi_dvpp_epoll_ctl_op.

fd: int, file descriptor of the media data processing channel. To obtain a file descriptor in the VENC scenario, call acl.himpi.venc_get_fd. To obtain a file descriptor in the VDEC scenario, call acl.himpi.vdec_get_fd.

event: int, pointer address to the epoll event information. This parameter describes the event type of the corresponding media data processing channel and the associated user data. This parameter is invalid when a deletion operation is performed.

ret: int, error code.

• 0 indicates success.
• Other values: failure. For details, see Common Return Codes.

• acl.himpi.sys_create_epoll, acl.himpi.sys_ctl_epoll, acl.himpi.sys_wait_epoll, and acl.himpi.sys_close_epoll must be used together to operate the input and output data of the media data processing channel by using the epoll programming model.
• The VPC function does not support this API.