类型别名 av_format_control_message 

pub type av_format_control_message = Option<unsafe extern "C" fn(s: *mut AVFormatContext, type_: c_int, data: *mut c_void, data_size: usize) -> c_int>;

Callback used by devices to communicate with application.

别名类型

pub enum av_format_control_message {
    None,
    Some(unsafe extern "C" fn(*mut AVFormatContext, i32, *mut c_void, usize) -> i32),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut AVFormatContext, i32, *mut c_void, usize) -> i32)

Some value of type T.