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DeeJanuzandClaude Opus 5.5
1a76d1560b
The history of frame-hands (~/Desktop/Projects/frame-hands on the Frame), filtered to what moves: the camera broker (camd/), the tracker and its offline tools (trackd/), the shared file layouts (include/), the ncnn models, the analysis tools, and the calibration and model helpers they import from the Python prototype. The reverse-engineering notes, probes, camprobe, and the rest of the prototype stay in frame-hands. Unchanged here: the renames to ft- names and Frametop paths follow. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/*
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* xrcams - find the headset cameras and the DMA-BUF queues XRService feeds them.
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*
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* Adapted from framecap.c in FrameEyeCameraFeed (vendor/FrameEyeCameraFeed),
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* MIT License, Copyright (c) 2026 Curtis English. See LICENSE.FrameEyeCameraFeed.
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*/
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#pragma once
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <linux/videodev2.h>
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#define XR_MAX_CAMERAS 16
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#define XR_MAX_GROUPS 32
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#define XR_MAX_RUNBUFS 128
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#define XR_SENSOR_LEN 64
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typedef struct {
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int node; /* N from /dev/videoN */
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unsigned minor; /* char device minor, as tracepoints report it */
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char path[64];
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unsigned width;
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unsigned height;
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unsigned bytesperline;
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unsigned nplanes;
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size_t planesize[VIDEO_MAX_PLANES];
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uint32_t pixfmt;
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char sensor[XR_SENSOR_LEN]; /* media entity name of the sensor */
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const char *role;
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} xr_camera_t;
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typedef struct {
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int xfd; /* plane 0 descriptor in XRService */
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int xfd1; /* plane 1 descriptor in XRService */
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size_t size;
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size_t size1;
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} xr_bufref_t;
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/* One run of buffers XRService allocated for a camera queue, in allocation order. */
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typedef struct {
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size_t planesize[2];
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int nbufs;
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xr_bufref_t buf[XR_MAX_RUNBUFS];
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char sensor[XR_SENSOR_LEN]; /* from the preceding sensor subdev */
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xr_camera_t *cam;
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} xr_group_t;
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typedef struct {
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pid_t pid;
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xr_camera_t cameras[XR_MAX_CAMERAS];
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int ncameras;
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xr_group_t groups[XR_MAX_GROUPS];
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int ngroups;
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} xr_state_t;
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typedef enum {
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XR_FMT_GREY8, /* 8-bit mono */
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XR_FMT_NV12, /* 8-bit Y plane then interleaved UV, same pitch */
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XR_FMT_YUV420_10P /* like NV12, but 10-bit MIPI-packed (4 px in 5 bytes) */
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} xr_fmt_t;
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/* Where the image really sits in plane 0; V4L2's numbers can be misleading. */
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typedef struct {
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xr_fmt_t fmt;
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unsigned pitch; /* bytes per row */
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unsigned rows; /* rows in plane 0: luma, plus chroma for YUV */
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unsigned width; /* valid pixels per row */
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unsigned height; /* luma rows */
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} xr_layout_t;
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/* Scan XRService's descriptors and the media graph. Needs root. */
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bool xr_discover(xr_state_t *st, const char *process, char *err, size_t errn);
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unsigned xr_camera_stride(const xr_camera_t *c);
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void xr_camera_layout(const xr_camera_t *c, xr_layout_t *l);
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const char *xr_fmt_name(xr_fmt_t f);
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void xr_print(const xr_state_t *st, FILE *f);
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void xr_slugify(const char *in, char *out, size_t n);
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