hi_aio_attr

Description

Defines the attributes of the AIO device.

Prototype

typedef struct {
    hi_audio_sample_rate sample_rate;    
    hi_audio_bit_width   bit_width;      
    hi_aio_mode          work_mode;      
    hi_audio_snd_mode    snd_mode;       
    hi_u32               expand_flag;    

    hi_u32               frame_num;      
    hi_u32               point_num_per_frame;    
    hi_u32               chn_cnt;        
    hi_u32               clk_share;     
    hi_aio_i2s_type      i2s_type;     
} hi_aio_attr;

Members

Member	Description
sample_rate	Audio sampling rate. This parameter is invalid in slave mode. Only the 48 kHz sampling rate is supported.
bit_width	Audio sampling precision. In slave mode, this parameter must match the AD/DA sampling precision. Only 16-bit and 24-bit are supported.
work_mode	Defines the AI and AO operating modes. This parameter can only be set to 0 (indicating the primary mode). The system automatically sets it to 0 regardless of whether it is set to another value.
snd_mode	Audio channel mode. 0 indicates single-channel, and 1 indicates dual-channel.
expand_flag	Audio bit width extension flag. This parameter is reserved and does not take effect. The system automatically sets it to 0 regardless of whether it is set to another value.
frame_num	Number of buffered frames. Value range: [2, 300]
point_num_per_frame	Number of sampling points in a frame The value range of AI is [480, 2048], and that of AO is [480, 4096].
chn_cnt	Number of channels supported by each I2S. A maximum of two channels are supported. In dual-channel mode, the value is fixed at 2. In single-channel mode, the value is fixed at 1.
clk_share	Whether AI device 0 multiplexes the frame sync clock and bit stream clock of AO device 0. This parameter is reserved and does not take effect. The system automatically sets it to 1 regardless of whether it is set to another value.
i2s_type	I2S type of the device This parameter can only be set to 0 (indicating connecting to the built-in codec). The system automatically sets it to 0 regardless of whether it is set to another value.

Parent topic: Audio