🐛 fix(main): 修复摄像头打开错误处理,

在 `main` 函数中，添加了对摄像头打开错误的处理逻辑。如果摄像头打开失败，会输出错误信息并跳过后续的图像捕获和显示操作。

src/main.rs

@@ -7,9 +7,9 @@ use fltk::{
     window::Window,
 };
 use rscam::{Camera, Config};
-use std::io;
 
-fn main() -> io::Result<()> {
+fn main() {
+    let mut camera_open = false;
     let app = App::default();
     let mut wind = Window::new(100, 100, 400, 300, "Hello from rust");
     let mut frame = Frame::default_fill();
@@ -20,37 +20,41 @@ fn main() -> io::Result<()> {
     let mut camera = Camera::new("/dev/video0").unwrap();
 
     // 配置摄像头参数
-    camera
-        .start(&Config {
-            interval: (1, 30),      // 设置帧率为 30fps
-            resolution: (640, 480), // 设置分辨率为 640x480
-            format: b"MJPG",        // 设置图像格式为 MJPG
-            ..Default::default()
-        })
-        .unwrap();
-
-    loop {
-        // 捕获一帧图像
-        match camera.capture() {
-            Ok(data) => {
-                let img = image::load_from_memory(&data).unwrap();
-                let rgb_data = img.to_rgb8();
-
-                let fltk_image = fltk::image::RgbImage::new(
-                    &rgb_data.as_raw(),
-                    rgb_data.width() as i32,
-                    rgb_data.height() as i32,
-                    ColorDepth::Rgb8,
-                )
-                .unwrap();
-                frame.set_image(Some(fltk_image));
-                frame.redraw();
-            }
-            Err(e) => {
-                eprintln!("捕获错误: {}", e);
-                continue;
-            }
+    match camera.start(&Config {
+        interval: (1, 30),      // 设置帧率为 30fps
+        resolution: (640, 480), // 设置分辨率为 640x480
+        format: b"MJPG",        // 设置图像格式为 MJPG
+        ..Default::default()
+    }) {
+        Ok(_) => camera_open = true,
+        Err(e) => {
+            eprint!("Open Camera Error:{}", e)
+        }
+    }
+    if camera_open {
+        loop {
+            // 捕获一帧图像
+            match camera.capture() {
+                Ok(data) => {
+                    let img = image::load_from_memory(&data).unwrap();
+                    let rgb_data = img.to_rgb8();
+
+                    let fltk_image = fltk::image::RgbImage::new(
+                        &rgb_data.as_raw(),
+                        rgb_data.width() as i32,
+                        rgb_data.height() as i32,
+                        ColorDepth::Rgb8,
+                    )
+                    .unwrap();
+                    frame.set_image(Some(fltk_image));
+                    frame.redraw();
+                }
+                Err(e) => {
+                    eprintln!("捕获错误: {}", e);
+                    continue;
+                }
+            }
+            app.wait();
         }
-        app.wait();
     }
 }