Data for a buffer this stays constant for a buffer. More...

#include <spa/buffer/buffer.h>

Data Fields
uint32_t	type
	memory type, one of enum spa_data_type, when allocating memory, the type contains a bitmask of allowed types.

uint32_t	flags
	data flags

int64_t	fd
	optional fd for data

uint32_t	mapoffset
	offset to map fd at, this is page aligned

uint32_t	maxsize
	max size of data

void *	data
	optional data pointer

struct spa_chunk *	chunk
	valid chunk of memory

Detailed Description

Data for a buffer this stays constant for a buffer.

Examples: export-source.c, local-v4l2.c, midi-src.c, spa/examples/adapter-control.c, spa/examples/example-control.c, spa/examples/local-libcamera.c, spa/examples/local-v4l2.c, video-src-alloc.c, video-src-fixate.c, and video-src-reneg.c.

Field Documentation

◆ type

uint32_t spa_data::type

memory type, one of enum spa_data_type, when allocating memory, the type contains a bitmask of allowed types.

SPA_ID_INVALID is a special value for the allocator to indicate that the other side did not explicitly specify any supported data types. It should probably use a memory type that does not require special handling in addition to simple mmap/munmap.