package reisen import "C" func bufferSize(maxBufferSize C.int) C.ulong { var byteSize C.ulong = 8 return C.ulong(maxBufferSize) * byteSize } func channelLayout(audio *AudioStream) C.longlong { return C.longlong(audio.codecCtx.channel_layout) } func rewindPosition(dur int64) C.longlong { return C.longlong(dur) }