hi_mpi_ai_set_chn_attr

Product	Supported
Atlas 350 Accelerator Card	☓
Atlas A3 training product / Atlas A3 inference product	☓
Atlas A2 training product / Atlas A2 inference product	☓
Atlas 200I/500 A2 inference product	√
Atlas inference product	☓
Atlas training product	☓

Sets the attributes of an AI channel.

hi_s32 hi_mpi_ai_set_chn_attr(hi_audio_dev ai_dev, hi_ai_chn ai_chn, const hi_ai_chn_attr *chn_attr)

Parameter	Input/Output	Description
ai_dev	Input	Audio device ID. The value range is [0, 2]. In the network video recorder (NVR) scenario, only dev2 is involved.
ai_chn	Input	AI channel ID. Only the mono audio channel is supported. The value of ai_chn is fixed at 0.
chn_attr	Input	Pointer to the structure of audio channel attributes. The channel attribute structure has only one member variable, which is used to set the working mode of the channel. The default working mode is HI_AI_CHN_MODE_FAST. In the network video recorder (NVR) scenario, the HI_AI_CHN_MODE_NORMAL standard mode needs to be used, and the hi_mpi_ai_enable_resample interface can be called to enable the resampling function. In HI_AI_CHN_MODE_FAST mode, resampling is not supported, and the AI channel cannot be bound to the AENC channel. You need to call the hi_mpi_ai_get_frame API to obtain the audio data obtained by using the AI channel.

Parameter

Input/Output

Description

ai_dev

Input

Audio device ID. The value range is [0, 2].

In the network video recorder (NVR) scenario, only dev2 is involved.

ai_chn

Input

AI channel ID.

Only the mono audio channel is supported. The value of ai_chn is fixed at 0.

chn_attr

Input

Pointer to the structure of audio channel attributes.

The channel attribute structure has only one member variable, which is used to set the working mode of the channel. The default working mode is HI_AI_CHN_MODE_FAST.
In the network video recorder (NVR) scenario, the HI_AI_CHN_MODE_NORMAL standard mode needs to be used, and the hi_mpi_ai_enable_resample interface can be called to enable the resampling function.
In HI_AI_CHN_MODE_FAST mode, resampling is not supported, and the AI channel cannot be bound to the AENC channel. You need to call the hi_mpi_ai_get_frame API to obtain the audio data obtained by using the AI channel.