proc av_audio_fifo_alloc(sample_fmt: AVSampleFormat; channels, nb_samples: cint): ptr AVAudioFifo {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_audio_fifo_drain(af: ptr AVAudioFifo; nb_samples: cint): cint {.importc,
    cdecl, ...raises: [], tags: [], forbids: [].}

proc av_audio_fifo_free(af: ptr AVAudioFifo) {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_audio_fifo_peek(af: ptr AVAudioFifo; data: ptr pointer; nb_samples: cint): cint {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_audio_fifo_peek_at(af: ptr AVAudioFifo; data: ptr pointer;
                           nb_samples, offset: cint): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_audio_fifo_read(af: ptr AVAudioFifo; data: ptr pointer; nb_samples: cint): cint {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_audio_fifo_realloc(af: ptr AVAudioFifo; nb_samples: cint): cint {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_audio_fifo_reset(af: ptr AVAudioFifo) {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_audio_fifo_size(af: ptr AVAudioFifo): cint {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_audio_fifo_space(af: ptr AVAudioFifo): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_audio_fifo_write(af: ptr AVAudioFifo; data: ptr pointer;
                         nb_samples: cint): cint {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}