I don't know that there is an "authoritative information"; there may
only be hueristics. The cdfreaks forum might be a good place to ask
http://club.cdfreaks.com/

But as for adding cdw.sf.net to libcdio's "projects" page, that's been done.

Kamil Ignacak writes:
 > Hi,<br><br>I am looking for authoritative information on how to check if 
 > given media in drive is blank/empty: when either it is brand new CD-R/RW 
 > disc or a CD-RW disc that was blanked e.g. by cdrecord in fast or full 
 > mode.<br><br>I searched for this information in your online documentation, 
 > doxygen documentation of API, header files available on my computer and even 
 > in example programs available in libcdio sources.<br><br>There is no 
 > paragraph stating that "value x returned by function f() 
 > means that the disc is empty".<br><br>I have found an information that "An 
 > empty drive can be detected by checking if cdio_get_last_track_num() returns 
 > CDIO_INVALID_TRACK." I use cdio_get_first_track_num() in my code and check 
 > if it returns CDIO_INVALID_TRACK - this is how this function behaves for 
 > empty CD disc.<br><br>So at this point my code works, but I would like to be 
 > sure that it works not only by pure coincidence, but because I am using 
 > libcdio correctly.<br><br>Could you please let me 
 > know?<br><br>Kind regards,<br>Kamil Ignacak<br><br>By the way - could you 
 > please add this project: http://cdw.sourceforge.net/ to this list: 
 > http://www.gnu.org/software/libcdio/projects.html ? 
 > Thanks!<br><br><br><br><br />


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