1 files changed, 94 insertions, 0 deletions
diff --git a/src/detection/camera/camera_linux.c b/src/detection/camera/camera_linux.c
new file mode 100644
index 0000000..2fea2b4
--- /dev/null
+++ b/src/detection/camera/camera_linux.c
@@ -0,0 +1,94 @@
+#include "camera.h"
+#include "common/io.h"
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#if FF_HAVE_LINUX_VIDEODEV2
+    #include <linux/videodev2.h>
+#elif __has_include(<sys/videoio.h>) // OpenBSD
+    #include <sys/videoio.h>
+    #define FF_HAVE_LINUX_VIDEODEV2 1
+#endif
+
+const char* ffDetectCamera(FFlist* result) {
+#if FF_HAVE_LINUX_VIDEODEV2
+    char path[] = "/dev/videoN";
+
+    for (uint32_t i = 0; i <= 9; ++i) {
+        path[ARRAY_SIZE(path) - 2] = (char) (i + '0');
+        FF_AUTO_CLOSE_FD int fd = open(path, O_RDONLY | O_CLOEXEC);
+        if (fd < 0) {
+            if (errno == ENOENT) {
+                break;
+            }
+            if (errno == ENXIO) {
+                continue;
+            }
+            return "Failed to open /dev/videoN";
+        }
+
+        struct v4l2_capability cap = {};
+        if (ioctl(fd, VIDIOC_QUERYCAP, &cap) < 0 || !(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
+            continue;
+        }
+
+        struct v4l2_format fmt = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE };
+        if (ioctl(fd, VIDIOC_G_FMT, &fmt) < 0) {
+            continue;
+        }
+
+        FFCameraResult* camera = FF_LIST_ADD(FFCameraResult, *result);
+        ffStrbufInitS(&camera->name, (const char*) cap.card);
+        ffStrbufInit(&camera->vendor);
+        ffStrbufInitS(&camera->id, (const char*) cap.bus_info);
+        switch (fmt.fmt.pix.colorspace) {
+            case V4L2_COLORSPACE_SMPTE170M:
+                ffStrbufInitStatic(&camera->colorspace, "SMPTE 170M");
+                break;
+            case V4L2_COLORSPACE_SMPTE240M:
+                ffStrbufInitStatic(&camera->colorspace, "SMPTE 240M");
+                break;
+            case V4L2_COLORSPACE_BT878:
+                ffStrbufInitStatic(&camera->colorspace, "BT.878");
+                break;
+            case V4L2_COLORSPACE_470_SYSTEM_M:
+                ffStrbufInitStatic(&camera->colorspace, "NTSC");
+                break;
+            case V4L2_COLORSPACE_470_SYSTEM_BG:
+                ffStrbufInitStatic(&camera->colorspace, "EBU 3213");
+                break;
+            case V4L2_COLORSPACE_JPEG:
+                ffStrbufInitStatic(&camera->colorspace, "JPEG");
+                break;
+            case V4L2_COLORSPACE_REC709:
+            case V4L2_COLORSPACE_SRGB:
+                ffStrbufInitStatic(&camera->colorspace, "sRGB");
+                break;
+            case 9 /* V4L2_COLORSPACE_OPRGB */:
+                ffStrbufInitStatic(&camera->colorspace, "Adobe RGB");
+                break;
+            case 10 /* V4L2_COLORSPACE_BT2020 */:
+                ffStrbufInitStatic(&camera->colorspace, "BT.2020");
+                break;
+            case 11 /* V4L2_COLORSPACE_RAW */:
+                ffStrbufInitStatic(&camera->colorspace, "RAW");
+                break;
+            case 12 /* V4L2_COLORSPACE_DCI_P3 */:
+                ffStrbufInitStatic(&camera->colorspace, "DCI-P3");
+                break;
+            default:
+                ffStrbufInit(&camera->colorspace);
+                break;
+        }
+        camera->width = fmt.fmt.pix.width;
+        camera->height = fmt.fmt.pix.height;
+    }
+
+    return NULL;
+#else
+    FF_UNUSED(result);
+    return "Fastfetch was compiled without <linux/videodev2.h>";
+#endif
+}