WAV.svobject © 1994 by Andreas R. Kleinert. FREEWARE. All rights reserved. Version : 2.3 Release Date : 11.12.1994 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 : ~~~~~~~~~ V2.3 (11.12.1994) : - fixed internal bug V2.2 (21.07.1994) : - added possibility to save all Samples from all multiple-SampleList and to accept NULL parameters for the Source-SPObject with SPO_Write(), so that custom applications may save their self- created SampleLists by simply setting them via SPO_SetSampleList(). The old way behaviour is still supported (as also handling of V1 SPObjects). - in former versions the sourcebuffer had been left "trashed", because conversion into the WAV format (via XOR) had not been reversed. Now the old buffer is reconstructed after saving. V2.1 (17.07.1994) : - integrated new "SampleList"-Functions for exporting more than one sample V1.4 (19.06.1994) : - version still reflected 1.2 instead 1.3. Now we're at 1.4 :-) - changed way of reading the WAV-Header, so that files with extended Headers (don't know if there are such files) might be read as well in the future, while files with shortened header (possibly corrupted) will no longer be accepted (they would be interpreted wrong, anyway). - made some WORDs to UWORDs - fixed possible bug-source (memory) 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.