1 files changed, 50 insertions, 0 deletions
diff --git a/video-ps3eye/module.cpp b/video-ps3eye/module.cpp
index e69de29b..b04c6acb 100644
--- a/video-ps3eye/module.cpp
+++ b/video-ps3eye/module.cpp
@@ -0,0 +1,50 @@
+#include "module.hpp"
+
+#include <libusb.h>
+
+int device_count()
+{
+    libusb_context * ctx = nullptr;
+    libusb_device **list = nullptr;
+    ssize_t sz = 0;
+    int rc = 0, cnt = 0;
+
+    constexpr int vendor_id = 0x1415;
+    constexpr int product_id = 0x2000;
+
+    rc = libusb_init(&ctx);
+
+    if (rc)
+        goto end;
+
+    sz = libusb_get_device_list(ctx, &list);
+
+    if (sz < 0)
+        goto end;
+
+    for (int i = 0; i < sz; ++i) {
+        libusb_device *device = list[i];
+        libusb_device_descriptor desc = {};
+
+        if (libusb_get_device_descriptor(device, &desc))
+            goto end;
+
+        if (desc.idVendor == vendor_id && desc.idProduct == product_id)
+            cnt++;
+    }
+
+end:
+    if (list)
+        libusb_free_device_list(list, 1);
+    if (ctx)
+        libusb_exit(ctx);
+
+    return cnt;
+}
+
+bool check_device_exists()
+{
+    static bool ret = device_count() > 0;
+    return ret;
+}
+