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1995-03-09
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*** WAV DataType V40.2 ***
by David N.Junod and Christian Buchner
This is an enhanced WAV datatype based on the sourcecodes found
in the OS 3.1 Native Developer Kit. It was originally written
by David N.Junod. All changes were done by Christian Buchner.
Installation
------------
Copy devs/Datatypes/WAVE#? SYS:devs/Datatypes/
Copy classes/Datatypes/wav.datatype SYS:classes/Datatypes/
Now reboot or type "AddDatatypes REFRESH" in a shell.
Enhancements over V39.1
-----------------------
* Handles 8 and 16 bit MONO and STEREO WAV files correctly. For
STEREO WAVs, the channels will be mixed together. (Sound
datatypes are not capable of playing stereo samples!)
* it accepts WAV files that are one byte too short and does not
return an error in that case. (I found out to have lots of
these 'buggy' WAV files.)
* loads the sample to Fast RAM if possible (you need
sound.datatype V40 for that feature!)
* saves memory while loading samples by reading and decoding
only small (32K) chunks. The old WAV datatype V39.1 needed
twice the length of a sample as free memory.
* uses optimized assembly routines for converting/mixing the
sound data.
Future enhancements
-------------------
* Implement different decompression methods (ADPCM, a-law,
y-law) -> DOCUMENTATION DESPERATELY NEEDED!!! (see address
below)
* "Normalization" of the sample by stretching it to full 8 bit
signal range.
Future projects
---------------
* VOC datatype
Please send me the documentation of any sound and/or sound
compression format you know. (see address below)
The Author
----------
Christian Buchner
Ganghoferstraße 2
82110 Germering
Germany
Tel.: +49-89-844872
EMAIL: flowerp@eikon.e-technik.tu-muenchen.de
<flowerp> on irc #amiga and #amigager
//
\X/ Flowerpower