matrixfurry.com
The open source OpenXR runtime
1// Copyright 2019, Collabora, Ltd.
2// SPDX-License-Identifier: BSL-1.0
3/*!
4 * @file
5 * @brief OSVR HDK prober code.
6 * @author Jakob Bornecrantz <jakob@collabora.com>
7 * @author Rylie Pavlik <rylie.pavlik@collabora.com>
8 * @ingroup drv_hdk
9 */
10
11#include <stdio.h>
12#include <stdlib.h>
13
14#include "xrt/xrt_prober.h"
15
16#include "util/u_misc.h"
17#include "util/u_debug.h"
18
19#include "hdk_interface.h"
20#include "hdk_device.h"
21
22
23static const char HDK2_PRODUCT_STRING[] = "OSVR HDK 2";
24static const char HDK13_PRODUCT_STRING[] = "OSVR HDK 1.3/1.4";
25static const char HDK1_PRODUCT_STRING[] = "OSVR HDK 1.x";
26static const char HDK12_PRODUCT_STRING[] = "OSVR HDK 1.2";
27
28int
29hdk_found(struct xrt_prober *xp,
30 struct xrt_prober_device **devices,
31 size_t device_count,
32 size_t index,
33 cJSON *attached_data,
34 struct xrt_device **out_xdev)
35{
36 struct xrt_prober_device *dev = devices[index];
37
38 unsigned char buf[256] = {0};
39 int result = xrt_prober_get_string_descriptor(xp, dev, XRT_PROBER_STRING_PRODUCT, buf, sizeof(buf));
40
41 enum HDK_VARIANT variant = HDK_UNKNOWN;
42 const char *name = NULL;
43 if (0 == strncmp(HDK2_PRODUCT_STRING, (const char *)buf, sizeof(buf))) {
44 variant = HDK_VARIANT_2;
45 name = HDK2_PRODUCT_STRING;
46 } else if (0 == strncmp(HDK1_PRODUCT_STRING, (const char *)buf, sizeof(buf))) {
47 variant = HDK_VARIANT_1_2;
48 name = HDK12_PRODUCT_STRING;
49 } else {
50 //! @todo just assuming anything else is 1.3 for now
51 variant = HDK_VARIANT_1_3_1_4;
52 name = HDK13_PRODUCT_STRING;
53 }
54
55 U_LOG_I("%s - Found at least the tracker of some HDK (%s) -- opening\n", __func__, name);
56
57 struct os_hid_device *hid = NULL;
58 // Interface 2 is the HID interface.
59 result = xrt_prober_open_hid_interface(xp, dev, 2, &hid);
60 if (result != 0) {
61 return -1;
62 }
63 struct hdk_device *hd = hdk_device_create(hid, variant);
64 if (hd == NULL) {
65 return -1;
66 }
67 *out_xdev = &hd->base;
68 return 1;
69}