[sdlsound] Sound_Seek() framework in place.

[Torbjörn Andersson]

I've split up my changes into what I hope are manageable chunks.

bugfix.diff fixes a logical error in SDL_sound.c. (When trying to clear 
individual sample flags it would actually clear them all.)

flac.diff implements seeking for the FLAC decoder. Annoyingly, libFLAC 
needs to know the total length of the undecoded stream, and the only way 
I can think of to find that out is to do an SDL_RWseek(rw, 0, SEEK_END) 
and see where that puts me, clearing the CANSEEK flag if it fails. I'm 
not entirely happy about this. The autoconf stuff would probably benefit 
if someone who knows what he's doing would take a look at it, as well.

midi.diff and modplug.diff implements seeking for the TiMidity and 
ModPlug decoders respectively.

mikmod.diff completely fails to implement seeking for the MikMod 
decoder, but is still important because the unpatched version _thinks_ 
it can seek.

playsound.diff adds a --skip option, which is what I used for testing 
this stuff so perhaps it'll be useful to others as well.

Torbjörn
-- 
TietoEnator Resource Management AB
Persona
Torbjörn Andersson
http://www.rm.tietoenator.com/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: bugfix.diff.gz
Type: application/x-gzip
Size: 470 bytes
Desc: not available
URL: <http://icculus.org/pipermail/sdlsound/attachments/20020424/87779692/attachment.gz>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: flac.diff.gz
Type: application/x-gzip
Size: 4056 bytes
Desc: not available
URL: <http://icculus.org/pipermail/sdlsound/attachments/20020424/87779692/attachment-0001.gz>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: midi.diff.gz
Type: application/x-gzip
Size: 743 bytes
Desc: not available
URL: <http://icculus.org/pipermail/sdlsound/attachments/20020424/87779692/attachment-0002.gz>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: mikmod.diff.gz
Type: application/x-gzip
Size: 560 bytes
Desc: not available
URL: <http://icculus.org/pipermail/sdlsound/attachments/20020424/87779692/attachment-0003.gz>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: modplug.diff.gz
Type: application/x-gzip
Size: 534 bytes
Desc: not available
URL: <http://icculus.org/pipermail/sdlsound/attachments/20020424/87779692/attachment-0004.gz>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: playsound.diff.gz
Type: application/x-gzip
Size: 913 bytes
Desc: not available
URL: <http://icculus.org/pipermail/sdlsound/attachments/20020424/87779692/attachment-0005.gz>