hi_mpi_ai_set_chn_attr

Product	Supported
Ascend 950PR / Ascend 950DT	☓
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	☓

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 mode must be used. The resampling function can be enabled by calling hi_mpi_ai_enable_resample. In the HI_AI_CHN_MODE_FAST mode, resampling is not supported, and an AI channel cannot be bound to an AENC channel. You can call hi_mpi_ai_get_frame to obtain audio data from an 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 mode must be used. The resampling function can be enabled by calling hi_mpi_ai_enable_resample.
In the HI_AI_CHN_MODE_FAST mode, resampling is not supported, and an AI channel cannot be bound to an AENC channel. You can call hi_mpi_ai_get_frame to obtain audio data from an AI channel.

For the API call sequence, see Voice Intercom (NVR Scenario).

Parent topic: AI/AO