hi_audio_frame

Description

Defines the audio frame.

Prototype

typedef struct {
    hi_audio_bit_width   bit_width;     /* audio frame bit_width */
    hi_audio_snd_mode    snd_mode;      /* audio frame momo or stereo mode */
    hi_u8 ATTRIBUTE *virt_addr[HI_AUDIO_FRAME_CHN_NUM];
    hi_u64 ATTRIBUTE phys_addr[HI_AUDIO_FRAME_CHN_NUM];
    hi_u64  time_stamp;                 /* audio frame time stamp */
    hi_u32  seq;                        /* audio frame seq */
    hi_u32  len;                        /* data length per channel in frame */
    hi_u32  pool_id[HI_AUDIO_FRAME_CHN_NUM];
} hi_audio_frame;

Members

Member	Description
bit_width	Audio sampling precision (bit width)
snd_mode	Audio channel mode
virt_addr	Virtual address of the audio frame data
phys_addr	Physical address of the audio frame data
time_stamp	Time stamp of the audio frame (unit: μs)
seq	Sequence number of the audio frame
len	Audio frame length of a single channel (unit: byte)
pool_id	ID of an audio frame buffer pool

len (audio frame length) indicates the data length of a single channel.

The mono-channel data is stored at the virtual address virt_addr [0], and the len. The left-channel data and right-channel data of the stereo data are stored separately. To be specific, the left-channel data with the length of len is stored at the virtual address virt_addr [0], whereas the right-channel data with the length of len is stored at the virtual address virt_addr [0].

Parent topic: Audio