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[Libcdio-devel] speaking of pre-gap detection....

From: R. Bernstein
Subject: [Libcdio-devel] speaking of pre-gap detection....
Date: Tue, 4 Mar 2008 05:54:27 -0500

Robert William Fuller writes:
 > It would seem that NRG files for audio discs have a pre-gap field for 
 > each track in the DAOX structure as "documented" at 

Neat. (This didn't exist when that image file driver first came out.)
It describes for example what the format is for CD-Text information
which is missing from the NRG driver.

 > I checked it out, and 
 > this does in fact seem to be the case, although the byte order is 
 > reversed (I most likely need to use some macro like UINT64_FROM_BE.)  I 
 > modified nrg.c to dump the pre-gap, start of track, and end of track 
 > from the DAOX structure.  (I used cdio_warn.)
 > So, we're back to the age old question of how to export this 
 > information.  What is your opinion of the following for an API?
 > lsn_t cdio_get_track_pregap_lsn(const CdIo_t *p_cdio, track_t i_track);
 > I would have it return CDIO_INVALID_LSN if the data isn't available.
 > Thoughts, questions, concerns?

I'm cool with this. What do others think?

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