WAV.svobject

  © 1994 by Andreas R. Kleinert.

  FREEWARE. All rights reserved.

  Version      : 1.3
  Release Date : 29.04.1994


  Description
  ~~~~~~~~~~~
  WAV.svobject is an external Library-Module for the superplay.library V1+.

  It supports reading and writing of PC RIFF-WAVE (WAV) Sample-Files,
  playing is supported as far as the Amiga is able to (8 Bit only).


  Author
  ~~~~~~
  Andreas R. Kleinert
  Grube Hohe Grethe 23
  D-57074 Siegen
  Germany


  History :
  ~~~~~~~~~
  V1.3 (29.04.1994) :

   - fixed (hopefully) "header not located" problems within memory
     delocation
   - also fixed AllocMem()/FreeVec() conflict with SampleData-Buffer


  V1.2 (31.03.1994) :

   You should consider V1.1 to be a _BAD_ BETA-Version now, because :

   - as soon as I got some original (not converted) WAV-Files, I found
     out, that V1.1 was more or less UN-USEABLE, because it was so
     BUGGY ;<
   - IntelToMotorola (and reverse) conversion was not correct for
     LONGwords, which concerned :

      - ChunkSize	    (File Header : FileSize)
      - SubSize 	    (Fmt  Chunk  : Chunk Size)
      - SamplesPerSec	    (Fmt  Chunk  : Frequency)
      - BytesPerSec	    (Fmt  Chunk  : Frequency, stereo)
      - DataSize	    (Data Chunk  : Chunk Size)

     If you were "lucky", this might have meant, that the samples would
     have been played too short and with the wrong frequency ;)
     If you were "unlucky", they would not have been played at all !

     Due to these bugs, only self-written WAV-Files were replayed
     correctly, because they were WRITTEN AS WRONG as they have been read.
   - The Fmt-Header ID was written as "FMT " instead of "fmt ", so that
     perhaps not all other programs might accept files written with the
     old V1.1-WAV.spobject.
     Nevertheless you may recover your self-created WAV-Files by passing
     them through the Freeware-Tool SoundZAP V2.3 (Fish-Disk 646), which
     accepts them obviously (only the frequency might be wrong).

   - Now the positive things :

     - with this version not only the File Header, but also the single Chunks
       are now checked for their correct IDs : - "WAVE","RIFF" (Header)
					       - "fmt "        (Fmt-Chunk)
					       - "data"        (Data-Chunk)
     - since this version also a length of the Fmt-Chunk greater than
       16 Bytes will be handled correctly : this definitely will not happen
       at the time, but may happen with future expansions of the RIFF-WAVE-
       Format
     - the Longword-Conversion now works ;)
     - now testing with "real" WAV-Files has been done :
       there's a high probability now, that all WAV-Files - assuming that
       they actually fit into your Chip Memory ;) - will be played in the
       right way
     - now there's more information given about the loaded Sample :
       This information will even be available, even if there's not enough
       memory to store the actual sample-data (e.g. more than 2 MByte
       sample data against 1 MByte free Chip Memory)
     - and more


  V1.1 (30.03.1994) :

   - we use RawDoFmt()-based sprintf()-routine, instead of SAS/C's.
     This saves about 1800 Bytes.
   - "utility.library" is not used, because this crashes the Player-Task
     and no reason for this could be found.
   - first version


  Literature
  ~~~~~~~~~~
  [1] "c't", Magazin für Computertechnik, Issue 1/1993, DMV-Verlag


  Copyrights
  ~~~~~~~~~~
  Some of the mentioned names or products above may be copyrighted by
  companies or trademarks of companies.