From 3edd8a674071d40f86ed1539976bde4ee46edf7c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E9=80=9A=E6=B4=B2?= <zhangsongcui3371@sina.com>
Date: Fri, 2 Feb 2024 22:14:25 +0800
Subject: [PATCH] Camera (Linux): init support

---
 CMakeLists.txt                      |  2 +-
 src/detection/camera/camera_linux.c | 46 +++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 src/detection/camera/camera_linux.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d73f19f4e8..f3f15e0b16 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -433,7 +433,7 @@ if(LINUX)
         src/detection/wm/wm_nosupport.c
         src/detection/de/de_linux.c
         src/detection/wmtheme/wmtheme_linux.c
-        src/detection/camera/camera_nosupport.c
+        src/detection/camera/camera_linux.c
         src/util/platform/FFPlatform_unix.c
     )
 elseif(ANDROID)
diff --git a/src/detection/camera/camera_linux.c b/src/detection/camera/camera_linux.c
new file mode 100644
index 0000000000..99a2b85b6a
--- /dev/null
+++ b/src/detection/camera/camera_linux.c
@@ -0,0 +1,46 @@
+#include "camera.h"
+#include "common/io/io.h"
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#if __has_include(<linux/videodev2.h>)
+    #include <linux/videodev2.h>
+#endif
+
+const char* ffDetectCamera(FFlist* result)
+{
+#if __has_include(<linux/videodev2.h>)
+    char path[] = "/dev/videoN";
+
+    for (uint32_t i = 0; i <= 9; ++i)
+    {
+        path[sizeof(path) - 2] = (char) (i + '0');
+        FF_AUTO_CLOSE_FD int fd = open(path, O_RDONLY);
+        if (fd < 0)
+            break;
+
+        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 = (FFCameraResult*) ffListAdd(result);
+        ffStrbufInitS(&camera->name, (const char*) cap.card);
+        ffStrbufInit(&camera->vendor);
+        ffStrbufInitS(&camera->id, (const char*) cap.bus_info);
+        camera->width = camera->height = 0;
+
+        camera->width = fmt.fmt.pix.width;
+        camera->height = fmt.fmt.pix.height;
+    }
+
+    return NULL;
+#else
+    return "Fastfetch was compiled without <linux/videodev2.h>";
+#endif
+}