sys_ctl_epoll

Product	Supported (√/x)
Atlas A3 training products / Atlas A3 inference products	√
Atlas A2 training products / Atlas A2 inference products	√
Atlas training products	x
Atlas inference products	√
Atlas 200I/500 A2 inference products	√

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

C Prototype

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

Python Function

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

Parameter	Description
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	Dict, epoll event information structure. 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. For details, see hi_dvpp_epoll_event.

Return Value	Description
ret	Int, error code. 0: success. Other values: failures. 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.

For details about the API call sequence and example, see JPEGE and VENC.

For details about the API call sequence and example, see JPEGE.

Parent topic: Common APIs