Function dump_capabilities

rustcv-backend-v4l2/examples/camera_view.rs:213–252

(dev_path: &str)

#[cfg(target_os = "linux")]
fn dump_capabilities(dev_path: &str) -> anyhow::Result<()> {
    println!("--- Inspecting capabilities for: {} ---", dev_path);

    // 【关键修复】显式引入枚举和它的变体结构体
    use v4l::framesize::FrameSizeEnum;

    let dev = v4l::Device::with_path(dev_path)?;
    let formats = dev.enum_formats()?;

    for fmt in formats {
        println!("[Format] {} ({})", fmt.fourcc, fmt.description);

        match dev.enum_framesizes(fmt.fourcc) {
            Ok(sizes) => {
                for size in sizes {
                    // 【关键修复】使用引入的 FrameSize 枚举进行匹配
                    match size.size {
                        FrameSizeEnum::Discrete(d) => {
                            println!("    - {}x{}", d.width, d.height);
                        }
                        FrameSizeEnum::Stepwise(s) => {
                            println!(
                                "    - Stepwise: {}x{} to {}x{} (step {}x{})",
                                s.min_width,
                                s.min_height,
                                s.max_width,
                                s.max_height,
                                s.step_width,
                                s.step_height
                            );
                        }
                    }
                }
            }
            Err(e) => println!("    - Failed to get sizes: {}", e),
        }
    }
    println!("----------------------------------------\n");
    Ok(())
}

#[cfg(not(target_os = "linux"))]
fn main() {