From:	sime AT fly DOT cc DOT fer DOT hr (Simun Mikecin)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Allegro & WAV files
Date:	22 Mar 1997 13:02:37 GMT
Organization:	etf
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Distribution:	world
Message-ID:	<5h0l9d$kjk@bagan.srce.hr>
References:	<19970318 DOT 231802 DOT 18302 DOT 1 DOT bshadwick AT juno DOT com> <L6nhZGAaWEMzEwXy AT talula DOT demon DOT co DOT uk>
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To:	djgpp AT delorie DOT com
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Shawn Hargreaves (Shawn AT talula DOT demon DOT co DOT uk) wrote:
: Ben N Shadwick writes:
: >Is there a size limit on WAV (digitized sound) files that can be played
: >in Allegro? I have this one file that's about 750k that plays fine, but
: >this other one that's just over 1meg cuts off after a second or so. I

: That is the result of an overflow in the counter I use to store the
: voice position. It is a 32 bit unsigned int in fixed point 20.12 format,
: which allows sounds up to 1048576 samples in length. How long that is in
: human terms depends on the frequency of the sample: at 22050hz it is
: just over 45 seconds. To play longer samples you could try reducing the
: accuracy of the counter (edit sound,c and reduce the value of
: MIXER_FIX_SHIFT). In fact I think I will have a play with that and see
: how low I can get it, before starting to lose too much precision...

Couldn't you use 64-bit unsigned int (unsigned long long), and have both the
accuracy and length?

--

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