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[common] input: define per-client streams

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Extend input status with eight exported client-to-host stream
endpoints, matching the maximum number of LGMP clients.

Publish each endpoint descriptor, client binding, epoch, and lifecycle
flags. Require every input activation to keep its ordered records on a
single transport.

Retain the queue transport as a fallback and bump the input and
KVMFR protocol versions for the expanded status layout.
This commit is contained in:
Geoffrey McRae
2026-08-15 14:01:19 +10:00
parent d28f576145
commit b3e9bc2e7f
2 changed files with 70 additions and 8 deletions
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2
common/include/common/KVMFR.h
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@@ -32,7 +32,7 @@
#include "KVMFRInput.h"
#define KVMFR_MAGIC "KVMFR---"
#define KVMFR_VERSION 33
#define KVMFR_VERSION 34
// Fallback used by producers that cannot report the source display's SDR
// white level. IDD frames override this with IDDCX_METADATA2::SdrWhiteLevel.

68
common/include/common/KVMFRInput.h
View File

@@ -23,10 +23,16 @@
#pragma once
#include "KVMFRStream.h"
#include <stddef.h>
#include <stdint.h>
#define KVMFR_INPUT_VERSION 1
#define KVMFR_INPUT_VERSION 2
#define KVMFR_INPUT_STREAM_VERSION 1
#define KVMFR_INPUT_STREAM_ENDPOINT_COUNT 8
#define KVMFR_INPUT_STREAM_SLOT_COUNT 128
#define KVMFR_INPUT_STREAM_SLOT_SIZE 64
#define KVMFR_INPUT_MOUSE_BUTTON_COUNT 32
#define KVMFR_INPUT_MOUSE_ABSOLUTE_MAX 32767
#define KVMFR_INPUT_KEYBOARD_KEY_COUNT 6
@@ -87,6 +93,12 @@ enum
typedef uint32_t KVMFRInputMessageType;
/*
* One activation must remain on one ordered transport. CLAIM is sequence one,
* reports, KEEPALIVE and RESET increment the sequence, and RELEASE is the
* final record. A sender must start a new generation instead of moving an
* active sequence between the queue fallback and a stream endpoint.
*/
typedef struct KVMFRInputMessage
{
KVMFRInputMessageType type;
@@ -117,6 +129,37 @@ enum
typedef uint32_t KVMFRInputStatusFlags;
enum
{
KVMFR_INPUT_TRANSPORT_QUEUE = 0x1,
KVMFR_INPUT_TRANSPORT_STREAM = 0x2,
};
typedef uint32_t KVMFRInputTransportFlags;
enum
{
KVMFR_INPUT_STREAM_ENDPOINT_AVAILABLE = 0x1,
KVMFR_INPUT_STREAM_ENDPOINT_BOUND = 0x2,
};
typedef uint32_t KVMFRInputStreamEndpointFlags;
/*
* A bound endpoint is usable only by boundClientID for bindingGeneration. The
* host changes bindingGeneration before reusing an endpoint so stale writers
* can never be accepted as a new client.
*/
typedef struct KVMFRInputStreamEndpoint
{
KVMFRStreamDescriptor stream;
uint32_t boundClientID;
uint32_t bindingGeneration;
KVMFRInputStreamEndpointFlags flags;
uint32_t reserved;
}
KVMFRInputStreamEndpoint;
typedef struct KVMFRInputStatus
{
uint32_t version;
@@ -128,6 +171,13 @@ typedef struct KVMFRInputStatus
// Input ownership lease duration in milliseconds.
uint32_t lease;
uint32_t maxButtons;
KVMFRInputTransportFlags transports;
uint32_t streamVersion;
uint32_t streamEndpointCount;
uint32_t streamGeneration;
uint32_t streamReserved[4];
KVMFRInputStreamEndpoint streamEndpoint[
KVMFR_INPUT_STREAM_ENDPOINT_COUNT];
}
KVMFRInputStatus;
@@ -144,7 +194,13 @@ static_assert(offsetof(KVMFRInputMessage, payload) == 16,
"KVMFR input message header layout changed");
static_assert(sizeof(KVMFRInputMessage) == 32,
"KVMFR input message layout changed");
static_assert(sizeof(KVMFRInputStatus) == 32,
static_assert(sizeof(KVMFRInputStreamEndpoint) == 48,
"KVMFR input stream endpoint layout changed");
static_assert(offsetof(KVMFRInputStatus, transports) == 32,
"KVMFR input status transport layout changed");
static_assert(offsetof(KVMFRInputStatus, streamEndpoint) == 64,
"KVMFR input stream discovery layout changed");
static_assert(sizeof(KVMFRInputStatus) == 448,
"KVMFR input status layout changed");
static_assert(sizeof(KVMFRInputMessage) <= 64,
"KVMFR input message must fit in one LGMP control message");
@@ -161,7 +217,13 @@ _Static_assert(offsetof(KVMFRInputMessage, payload) == 16,
"KVMFR input message header layout changed");
_Static_assert(sizeof(KVMFRInputMessage) == 32,
"KVMFR input message layout changed");
_Static_assert(sizeof(KVMFRInputStatus) == 32,
_Static_assert(sizeof(KVMFRInputStreamEndpoint) == 48,
"KVMFR input stream endpoint layout changed");
_Static_assert(offsetof(KVMFRInputStatus, transports) == 32,
"KVMFR input status transport layout changed");
_Static_assert(offsetof(KVMFRInputStatus, streamEndpoint) == 64,
"KVMFR input stream discovery layout changed");
_Static_assert(sizeof(KVMFRInputStatus) == 448,
"KVMFR input status layout changed");
_Static_assert(sizeof(KVMFRInputMessage) <= 64,
"KVMFR input message must fit in one LGMP control message");