Class CameraConfig

rustcv-camera/src/config.rs:23–58

/// ```
#[derive(Debug, Clone)]
pub struct CameraConfig {
    /// Requested width in pixels. `None` = let the driver choose.
    /// 请求的宽度（像素）。`None` = 由驱动自行选择。
    pub(crate) width: Option<u32>,

    /// Requested height in pixels. `None` = let the driver choose.
    /// 请求的高度（像素）。`None` = 由驱动自行选择。
    pub(crate) height: Option<u32>,

    /// Requested frames per second. `None` = driver default (usually 30).
    /// 请求的帧率。`None` = 驱动默认值（通常为 30）。
    pub(crate) fps: Option<u32>,

    /// Requested pixel format. `None` = auto-select based on fps.
    /// 请求的像素格式。`None` = 根据帧率自动选择。
    ///
    /// Auto-selection strategy:
    /// - fps < 60: prefer MJPEG (lower USB bandwidth)
    /// - fps >= 60: prefer YUYV/NV12 (lower decode overhead)
    ///
    /// 自动选择策略：
    /// - fps < 60：优先 MJPEG（USB 带宽更低）
    /// - fps >= 60：优先 YUYV/NV12（解码开销更小）
    pub(crate) pixel_format: Option<PixelFormat>,

    /// Number of kernel mmap buffers to allocate.
    /// 要分配的内核 mmap 缓冲区数量。
    ///
    /// More buffers = more tolerance for processing jitter,
    /// but uses more kernel memory.
    /// Default is 5, which provides ~166ms of buffer at 30fps.
    ///
    /// 缓冲区越多 = 对处理抖动的容忍度越高，但消耗更多内核内存。
    /// 默认为 5，在 30fps 下提供约 166ms 的缓冲余量。
    pub(crate) buffer_count: u32,
}

impl Default for CameraConfig {
    fn default() -> Self {