FILELENPROC callback

User file stream length callback function. 

QWORD CALLBACK FileLenProc(
    void *user
);

Parameters

userThe user instance data given when BASS_StreamCreateFileUser was called.

Return value

The length of the file in bytes. Returning 0 for a buffered file stream makes BASS stream the file in blocks and is equivalent to using the BASS_STREAM_BLOCK flag in the BASS_StreamCreateFileUser call.

Remarks

This function is called first thing, and only the once with buffered streams. With unbuffered streams, it may be called again when testing for EOF (end of file), allowing the file to grow in size.

See also

BASS_StreamCreateFileUser, BASS_FILEPROCS structure