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 does not take effect in slave mode). Only 48 kHz is supported.
bit_width	Audio sampling precision. In slave mode, this parameter must match the sampling precision of the audio AD/DA. Only 16-bit and 24-bit are supported.
work_mode	Defines the AI and AO operating modes. Only the value 0 (master mode) is supported. If other values are configured, the system automatically sets the value to 0.
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. If it is set to other values, the system automatically sets it to 0.
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. If this parameter is set to other values, the system automatically sets the value to 1.
i2s_type	I2S type of the device Only the value 0 is supported (for interworking with the built-in codec). If other values are configured, the system automatically sets the value to 0.

Parent topic: Audio-Related