ipc_shared_memory Struct Reference

A big struct that contains all data that is shared to a client, no pointers allowed in this. More...

#include </builds/monado/monado/src/xrt/ipc/shared/ipc_protocol.h>

Collaboration diagram for ipc_shared_memory:

Data Fields
char	u_git_tag [64]
	The git revision of the service, used by clients to detect version mismatches. More...
uint32_t	itrack_count
	Number of elements in itracks that are populated/valid. More...
struct ipc_shared_tracking_origin	itracks [XRT_SYSTEM_MAX_DEVICES]
	Array of shared tracking origin data. More...
uint32_t	isdev_count
	Number of elements in isdevs that are populated/valid. More...
struct ipc_shared_device	isdevs [XRT_SYSTEM_MAX_DEVICES]
	Array of shared data per device. More...
struct {
int32_t   head
int32_t   eyes
int32_t   face
int32_t   body
struct {
int32_t   left
int32_t   right
}   hand_tracking
}	roles
	Various roles for the devices. More...
struct {
struct {
struct {
uint32_t   w_pixels
uint32_t   h_pixels
}   display
	Pixel properties of this display, not in absolute screen coordinates that the compositor sees. More...
}   views [2]
uint32_t   view_count
enum xrt_blend_mode   blend_modes [XRT_MAX_DEVICE_BLEND_MODES]
uint32_t   blend_mode_count
}	hmd
struct xrt_input	inputs [1024]
struct xrt_output	outputs [128]
struct ipc_shared_binding_profile	binding_profiles [64]
struct xrt_binding_input_pair	input_pairs [1024]
struct xrt_binding_output_pair	output_pairs [128]
struct ipc_layer_slot	slots [128]
uint64_t	startup_timestamp

Detailed Description

A big struct that contains all data that is shared to a client, no pointers allowed in this.

To get the inputs of a device you go:

 {C++}
struct xrt_input *
helper(struct ipc_shared_memory *ism, uint32_t device_id, uint32_t input)
{
        uint32_t index = ism->isdevs[device_id]->first_input_index + input;
        return &ism->inputs[index];
}

Field Documentation

struct { ... } ipc_shared_memory::display

Pixel properties of this display, not in absolute screen coordinates that the compositor sees.

So before any rotation is applied by xrt_view::rot.

The xrt_view::display::w_pixels & xrt_view::display::h_pixels become the recommended image size for this view.

Todo:

doesn't account for overfill for timewarp or distortion?

isdev_count

uint32_t ipc_shared_memory::isdev_count

Number of elements in isdevs that are populated/valid.

isdevs

struct ipc_shared_device ipc_shared_memory::isdevs[XRT_SYSTEM_MAX_DEVICES]

Array of shared data per device.

Only isdev_count elements are populated/valid.

itrack_count

uint32_t ipc_shared_memory::itrack_count

Number of elements in itracks that are populated/valid.

itracks

struct ipc_shared_tracking_origin ipc_shared_memory::itracks[XRT_SYSTEM_MAX_DEVICES]

Array of shared tracking origin data.

Only itrack_count elements are populated/valid.

struct { ... } ipc_shared_memory::roles

Various roles for the devices.

u_git_tag

char ipc_shared_memory::u_git_tag[64]

The git revision of the service, used by clients to detect version mismatches.

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The documentation for this struct was generated from the following file:

• ipc/shared/ipc_protocol.h