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DeeJanuzandClaude Opus 5.5
e2abaa06b6
- The runtime files move to /run/user/UID/frametop-hands/: the desktop session deletes /run/user/UID/frametop at every start. - The cutout copy shader runs at highp: mediump (16-bit on Adreno) stepped 1.7 texels across a 3440-pixel screen. - One hand no longer pinches both sides after its left/right call flips mid-pinch, and --pinch-palm-down (0.6) holds back pinches with the palm facing down (typing on a lap keyboard). - ft-camd judges a colour frame fresh by its luma rows only, and logs per-buffer changes at stale colour frames with FT_CAMD_DEBUG=1. - hands/run.sh caps skips the setcap when ft-camd already has them. - The replay tool dumps poses (--poses), and its pinch events carry the hand id. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
59 lines
2.4 KiB
C
59 lines
2.4 KiB
C
/*
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* fh_hands - the tracked-hands file ft-hands publishes for ft-screens' hand cutouts
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* (/run/user/UID/frametop-hands/hands, directory mode 0700), rewritten in place
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* under a sequence lock: read seq, copy, read seq again; use the copy only if
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* both reads are the same even number.
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*
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* Positions are metres in the head frame at capture time, which is OpenVR's HMD
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* frame (+x right, +y up, -z forward). Turn them into the room with the HMD pose
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* at capture_ns (CLOCK_MONOTONIC). Writer: ft-hands (hands/track/io.cpp).
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*/
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#pragma once
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#include <assert.h>
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#include <stdint.h>
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#define FH_HANDS_MAGIC "FHHANDS1"
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#define FH_HANDS_VERSION 1
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#define FH_HANDS_MAX_HANDS 2
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#define FH_HANDS_MAX_CAPSULES 64
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enum {
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FH_HAND_RIGHT = 1u << 0, /* else the left hand */
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FH_HAND_STEREO = 1u << 1, /* triangulated from two or more cameras */
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};
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typedef struct {
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uint32_t id; /* stays the same while the hand is tracked */
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uint32_t flags; /* FH_HAND_* */
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float confidence;
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float reserved;
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float pts[21][3]; /* MediaPipe hand landmarks */
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uint32_t ncapsules; /* this hand's capsules, which follow the */
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/* previous hands' in capsules[] */
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} fh_hand_t; /* 272 bytes */
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typedef struct {
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float a[3], b[3]; /* segment ends */
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float ra, rb; /* radius at each end */
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} fh_capsule_t; /* 32 bytes: the hand's shape, to cut out */
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typedef struct {
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char magic[8];
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uint32_t version;
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uint32_t size;
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volatile uint64_t seq;
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uint64_t capture_ns; /* CLOCK_MONOTONIC when the cameras took the frames */
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uint64_t publish_ns; /* CLOCK_MONOTONIC when this was written */
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uint32_t nhands;
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uint32_t ncapsules;
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uint8_t reserved[16];
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fh_hand_t hands[FH_HANDS_MAX_HANDS];
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fh_capsule_t capsules[FH_HANDS_MAX_CAPSULES];
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} fh_hands_t;
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static_assert(sizeof(fh_hand_t) == 272, "fh_hand_t layout");
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static_assert(sizeof(fh_capsule_t) == 32, "fh_capsule_t layout");
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static_assert(sizeof(fh_hands_t) == 64 + 2 * 272 + 64 * 32, "fh_hands_t layout");
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