proc av_blowfish_alloc(): AVBlowfish {.importc, cdecl, ...raises: [], tags: [],
                                       forbids: [].}

proc av_blowfish_crypt(ctx: ptr AVBlowfish; dst, src: ptr uint8; count: cint;
                       iv: ptr uint8; decrypt: cint) {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_blowfish_crypt_ecb(ctx: ptr AVBlowfish; xl, xr: ptr uint32;
                           decrypt: cint) {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_blowfish_init(ctx: ptr AVBlowfish; key: ptr uint8; key_len: cint) {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}