hi_mpi_vo_enable_chn

Product	Supported
Atlas A3 training products / Atlas A3 inference products	☓
Atlas A2 training products / Atlas A2 inference products	☓
Atlas 200I/500 A2 inference products	√
Atlas inference products	☓
Atlas training products	☓

Enables a specified VO channel.

hi_s32 hi_mpi_vo_enable_chn(hi_vo_layer layer, hi_vo_chn chn)

Parameter	Input/Output	Description
layer	Input	VO layer ID. Value range: [0, 9) Graphics layers and cascade video layers are not supported.
chn	Input	VO channel ID. Value range: [0, 64)

Parameter

Input/Output

Description

layer

Input

VO layer ID.

Value range: [0, 9)

Graphics layers and cascade video layers are not supported.

chn

Input

VO channel ID.

Value range: [0, 64)

Before calling this API, ensure that the video layer is bound. Otherwise, a failure is returned.
Before calling this API, enable the video layer of the corresponding device.
Before enabling a channel, configure this channel. Otherwise, an error is returned, indicating that the channel is not configured.
A VO channel can be enabled repeatedly, and no failure is returned.
Currently, this API does not support multiple processes.