ffmpeg_sys::avio_alloc_context

pub unsafe extern fn avio_alloc_context(buffer: *mut c_uchar, buffer_size: c_int, write_flag: c_int, opaque: *mut c_void, read_packet: extern fn(*mut c_void, *mut uint8_t, c_int) -> c_int, write_packet: extern fn(*mut c_void, *mut uint8_t, c_int) -> c_int, seek: extern fn(*mut c_void, int64_t, c_int) -> int64_t) -> *mut AVIOContext