static AudioSource()
{
dRead = SourceRead;
dWrite = SourceWrite;
dGetSize = SourceGetSize;
dSetSize = SourceSetSize;
}
extern static int AudioFileOpenWithCallbacks(
IntPtr inClientData, ReadProc inReadFunc, WriteProc inWriteFunc,
GetSizeProc inGetSizeFunc, SetSizeProc inSetSizeFunc, AudioFileType inFileTypeHint, out IntPtr outAudioFile);
extern static OSStatus AudioFileInitializeWithCallbacks(
IntPtr inClientData, ReadProc inReadFunc, WriteProc inWriteFunc, GetSizeProc inGetSizeFunc, SetSizeProc inSetSizeFunc,
AudioFileType inFileType, ref AudioStreamBasicDescription format, uint flags, out IntPtr id);