dmic_buffer_context_s Struct Reference

DMIC buffer context structure. More...

#include <dmic.h>

Data Fields
uint8_t	channel
uint8_t *	buffer
uint32_t	buffer_size
uint32_t	offset_bytes
uint32_t	available_bytes

Detailed Description

DMIC buffer context structure.

Holds runtime buffer information for each DMIC channel including pointer, size, sample count, and available-byte metadata.

Field Documentation

channel

uint8_t dmic_buffer_context_s::channel

DMIC channel number

buffer

uint8_t* dmic_buffer_context_s::buffer

FIFO: application output buffer. DMA: same ring buffer configured through dmic_dma_config_t.buffer

buffer_size

uint32_t dmic_buffer_context_s::buffer_size

Total buffer size in bytes

offset_bytes

uint32_t dmic_buffer_context_s::offset_bytes

Data offset in bytes. DMA mode: offset of ready DMA period inside the ring buffer. FIFO mode normally returns 0

available_bytes

uint32_t dmic_buffer_context_s::available_bytes

Number of bytes currently available from offset_bytes. A value of 0 indicates no data available in nonblocking mode