proc av_append_path_component(path, component: cstring): cstring {.importc,
    cdecl, ...raises: [], tags: [], forbids: [].}

proc av_asprintf(fmt: cstring): cstring {.importc, cdecl, ...raises: [], tags: [],
    forbids: [].}

proc av_basename(path: cstring): cstring {.importc, cdecl, ...raises: [], tags: [],
    forbids: [].}

proc av_d2str(d: cdouble): cstring {....deprecated, importc, cdecl, ...raises: [],
                                     tags: [], forbids: [].}

proc av_dirname(path: cstring): cstring {.importc, cdecl, ...raises: [], tags: [],
    forbids: [].}

proc av_escape(dst: cstringArray; src, special_chars: cstring;
               mode: AVEscapeMode; flags: cint): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_get_token(buf: cstringArray; term: cstring): cstring {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_isdigit(c: cint): cint {.inline, importc, cdecl, ...raises: [], tags: [],
                                 forbids: [].}

proc av_isgraph(c: cint): cint {.inline, importc, cdecl, ...raises: [], tags: [],
                                 forbids: [].}

proc av_isspace(c: cint): cint {.inline, importc, cdecl, ...raises: [], tags: [],
                                 forbids: [].}

proc av_isxdigit(c: cint): cint {.inline, importc, cdecl, ...raises: [], tags: [],
                                  forbids: [].}

proc av_match_list(name, list: cstring; separator: cstring): cint {.importc,
    cdecl, ...raises: [], tags: [], forbids: [].}

proc av_match_name(name, names: cstring): cint {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_sscanf(string: cstring; format: cstring) {.varargs, importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_strcasecmp(a, b: cstring): cint {.importc, cdecl, ...raises: [], tags: [],
    forbids: [].}

proc av_strireplace(str, from, to: cstring): cstring {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_stristart(str, pfx: cstring; ptr: cstringArray): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_stristr(haystack, needle: cstring): cstring {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_strlcat(dst, src: cstring; size: csize_t): csize_t {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_strlcatf(dst: cstring; size: csize_t; fmt: cstring): csize_t {.varargs,
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_strlcpy(dst, src: cstring; size: csize_t): csize_t {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_strncasecmp(a, b: cstring; n: csize_t): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_strnlen(s: cstring; len: csize_t): csize_t {.inline, importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_strnstr(haystack, needle: cstring; hay_length: csize_t): cstring {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_strstart(str, pfx: cstring; ptr: cstringArray): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_strtok(s, delim: cstring; saveptr: cstringArray): cstring {.importc,
    cdecl, ...raises: [], tags: [], forbids: [].}

proc av_tolower(c: cint): cint {.inline, importc, cdecl, ...raises: [], tags: [],
                                 forbids: [].}

proc av_toupper(c: cint): cint {.inline, importc, cdecl, ...raises: [], tags: [],
                                 forbids: [].}

proc av_utf8_decode(codep: ptr int32; bufp: ptr ptr uint8; buf_end: ptr uint8;
                    flags: cuint): cint {.importc, cdecl, ...raises: [], tags: [],
    forbids: [].}