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[common] add frame scheduling protocol

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This commit is contained in:
Geoffrey McRae
2026-08-04 12:56:15 +10:00
parent 84d1427cab
commit 5626cfa55b
3 changed files with 94 additions and 8 deletions
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24
client/include/interface/transport.h
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@@ -59,6 +59,7 @@ enum
{
LG_TRANSPORT_FEATURE_SET_CURSOR_POS = 0x1,
LG_TRANSPORT_FEATURE_WINDOW_SIZE = 0x2,
LG_TRANSPORT_FEATURE_FRAME_SCHEDULE = 0x4,
};
typedef uint32_t LG_TransportFeatureFlags;
@@ -133,6 +134,7 @@ typedef struct LG_TransportFrame
{
uint64_t serial;
uint64_t timestamp;
uint32_t scheduleGeneration;
LG_TransportFrameFlags flags;
// Backend-owned immutable metadata, valid until releaseFrame.
const LG_TransportFrameFormat * format;
@@ -176,9 +178,20 @@ typedef enum LG_TransportControlType
{
LG_TRANSPORT_CONTROL_SET_CURSOR_POS,
LG_TRANSPORT_CONTROL_WINDOW_SIZE,
LG_TRANSPORT_CONTROL_FRAME_SCHEDULE,
}
LG_TransportControlType;
enum
{
LG_TRANSPORT_FRAME_SCHEDULE_ACTIVE = 0x1,
LG_TRANSPORT_FRAME_SCHEDULE_RELEASE = 0x2,
LG_TRANSPORT_FRAME_SCHEDULE_RESET = 0x4,
LG_TRANSPORT_FRAME_SCHEDULE_IMMEDIATE = 0x8,
};
typedef uint32_t LG_TransportFrameScheduleFlags;
typedef struct LG_TransportControl
{
LG_TransportControlType type;
@@ -186,6 +199,17 @@ typedef struct LG_TransportControl
{
struct { int32_t x, y; } cursorPos;
struct { uint32_t width, height; } windowSize;
struct
{
uint32_t generation;
LG_TransportFrameScheduleFlags flags;
uint64_t period;
uint64_t targetSlack;
int64_t phaseError;
uint32_t feedbackFrameSerial;
uint32_t lease;
}
frameSchedule;
};
}
LG_TransportControl;