xsample - extended sample objects for Max/MSP and pd (pure data)

Copyright (c) 2001-2003 Thomas Grill (xovo@gmx.net)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.  

Donations for further development of the package are highly appreciated.

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IMPORTANT INFORMATION for all MaxMSP users:

It is advisable to put the xsample shared library file into the "max-startup" folder. Hence it will be
loaded at Max startup.

If you want to load the xsample library on demand, create a [xsample] object in Max/MSP.

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You will need the flext C++ layer for PD and Max/MSP externals to compile this.
see http://www.parasitaere-kapazitaeten.net/ext


Package files:
- readme.txt: this one
- gpl.txt,license.txt: GPL license stuff
- main.h,main.cpp,inter.cpp,inter.ci: base class definition for all the other objects
- record.cpp: xrecord~
- play.cpp: xplay~
- groove.cpp: xgroove~

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The package should at least compile (and is tested) with the following compilers:

pd - Windows:
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o Borland C++ 5.5 (free): edit & run "make -f makefile.bcc"

o Microsoft Visual C++ 6: edit "xsample.dsp" project file
> due to a compiler bug the optimization using templates is not functional

pd - linux:
-----------
o GCC: edit "config-pd-linux.txt" and run "sh ./build-pd-linux.sh"
> various versions of GCC die during compile with template optimization turned on 

pd - OSX:
-----------
o GCC: edit "config-pd-darwin.txt" and run "sh ./build-pd-darwin.sh"
> various versions of GCC die during compile with template optimization turned on 

Max/MSP - MacOS9:
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o Metrowerks CodeWarrior: edit "xsample.cw" project file functions

o Apple MPW-PR: edit & use the "flext.mpw" makefile

Max/MSP - MacOSX:
----------------
o Metrowerks CodeWarrior: edit "xsample.cw" project file functions


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Goals/features of the package:

- portable and effective sample recording/playing objects for pd and Max/MSP
- MSP-like groove~ object for PD 
- message- or signal-triggered recording object with mix-in capability
- avoid the various bugs of the original MSP2 objects
- multi-channel capability 
- live update of respective buffer/array content
- switchable 4-point or linear interpolation for xplay~/xgroove~ object
- cross-fading loop zone (inside or outside to loop) for xgroove~

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Version history:

0.3.0:
- added resources to MaxMSP build
- xgroove~, xrecord~: introduced a loop/end bang outlet 
- added MaxMSP buffer resize recognition
- xgroove~: introduced a crossfading loop zone
- adapted source for flext 0.4.1 - most methods within class scope
- introduced attributes
- restructured make procedures
- corrected names of PD makefile, set help names
- fixed scale mode bug with xgroove~
- added validity check for buffers

0.2.4:
- according to flext 0.2.3 changed sample type to t_sample (S)
- xrecord~: fixed mix mode bug
- fixed argument buffer problem

0.2.3:
- using flext 0.2.2 - xsample is now a library under MaxMSP
- cleaner gcc makefile
- xgroove~, xrecord~: added "all" message to select entire buffer length
- xgroove~, xplay~: revisited dsp methods, restructured the code, fixed small interpolation bugs 
- xgroove~, xplay~: added linear interpolation (message "interp 2") 
- enabled 0 output channels -> xgroove~: position output only
- xgroove~: added bidirectional looping (message "loop 2")

0.2.2:
- using flext 0.2.0
- xrecord~ for PD: new flext brings better graphics update behavior
- xrecord~: recording position doesn't jump to start when recording length is reached
- fixed bug with refresh message (min/max reset)
- xgroove~: position (by pos message) isn't sample rounded anymore
- reset/refresh messages readjust dsp routines to current buffer format (e.g. channel count)
- corrected Max/MSP assist method for multi-channel
- fixed xplay~ help method 
- changed syntax to x*~ [channels=1] [buffer] for future enhancements (MaxMSP only, warning for old syntax)
- fixed small bug concerning startup position in xgroove~ and xrecord~
- fixed deadly bug in xplay~ dsp code (only active with template optimization) 

0.2.1:
- no leftmost float inlet for position setting - use pos method
- changed dsp handling for flext 0.1.1 conformance
- workarounds for buggy/incomplete compilers
- prevent buffer warning message at patcher load (wait for loadbang)
- fixed bug: current pos is reset when changing min or max points

0.2.0: 
- first version for flext

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TODO list:

general:

- do a smooth (line~) mixin in xrecord~ help patch

features:
- multi-buffer handling (aka multi-channel for pd)
- vasp handling
- performance comparison to respective PD/Max objects
- anti-alias filter? (possible?)

- delay min/max changes when cur pos in cross-fade zone

tests:
- reconsider startup sequence of set buffer,set units,set sclmode,set pos/min/max

bugs:
- PD: problems with timed buffer redrawing (takes a lot of cpu time) - flext bug?
- Apple MPW doesn't correctly compile template optimization 
- Max help files aren't correctly opened due to xsample objects residing in a library