imported>Ikskoks at 13:24, 17 January 2021

2021-01-17T13:24:02Z

← Older revision	Revision as of 13:24, 17 January 2021
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imported>Ikskoks at 13:24, 17 January 2021

2021-01-17T13:24:02Z

← Older revision		Revision as of 13:24, 17 January 2021
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	* [http://quick.mixnmojo.com/software.php#psychonautsexplorer Psychonauts Explorer]<br>		* [http://quick.mixnmojo.com/software.php#psychonautsexplorer Psychonauts Explorer]<br>


			[[Category:File Format]]

imported>WATTO at 05:45, 12 December 2005

2005-12-12T05:45:44Z

← Older revision	Revision as of 05:45, 12 December 2005
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imported>WATTO at 05:45, 12 December 2005

2005-12-12T05:45:44Z

New page

== ISB ==

* ''' Format Type ''': Archive 
* ''' [http://en.wikipedia.org/wiki/Endianness Endian Order] ''': Little Endian 

=== Format Specifications ===
<tt>
 ''' // ARCHIVE HEADER ''' 
: char {4}     - Header (ZPKG) 
: uint32 {4}   - Version (1) 
: uint32 {4}   - First File Offset 
: char {4}     - Header (RIFF) 
: uint32 {4}   - File Size (- 8) 
: char {8}     - (isbftitl) 
: uint32 {4}   - Size of Text Block 
: byte {X}     - Text Block 
 
 ''' // Repeated throughout file ''' 
: char {4}     - Block Name 
: uint32 {4}   - Block Size (not including 8 bytes for block name and size) 
: byte {X}     - Block Data 

Seek through the blocks unless the block is one of those below: 

 ''' // LIST Block''' 
: char {4}     - Header (LIST) 
: uint32 {4}   - Block Size (Including all sub-blocks) 
: char {8}     - Dummy Title? - (Usually 'sampltitl') 
: uint32 {4}   - Size of Filename 
: byte {X}     - Filename (Each letter is separated by a 0 byte)) 

The filename sometimes has the incorrect file extension so you'll want to remote this and replace it with the correct one. However sometimes the file extension has '-loop' tagged on the end eg 'AsylumExt.aif-Loop' - if you remove the file extension then this file would become 'AsylumExt' - but there is already a file with this name so you'd need to add 'loop' back to the filename somehow to make it a unique name eg 'AsylumExt-Loop'. 

 ''' // SINF Block''' 
: char {4}     - Header (SINF) 
: uint32 {4}   - Block Size 
: uint32 {8}   - ? 
: uint32 {4}   - Samplerate 
: uint32 {8}   - ? 

 ''' // CHNK Block''' 
: char {4}     - Header (CHNK) 
: uint32 {4}   - Block Size 
: uint32 {4}   - Number of Channels 

 ''' // CMPI Block''' 
: char {4}     - Header (CMPI) 
: uint32 {4}   - Block Size 
: uint32 {20}   - ? 
: uint32 {4}   - Wav Identifier (If = 1053609165 then its a normal pcm wav, otherwise its xbox adpcm) 

 ''' // DATA Block''' 
: char {4}     - Header (DATA) 
: uint32 {4}   - Block Size (Sometimes has 1 byte padding so: if blocksize mod 2 <> 0 then blocksize:=blocksize + 1 ) 
: byte {X}     - File Data 

Dump the file data then continue on to next LIST block. Repeat until you reach end of file. 

 ''' // DUMPING FILES''' 
If first 4 bytes of file data='OggS' then its an ogg file. Otherwise its always an xbox or normal pcm wav. 
If its an ogg file then just copy out 'Block Size' bytes. 
If its a wav file though you need to write the .wav header first: 

You need to write the following: 
: char {4}     - RIFF Header ('RIFF') 
: uint32 {4}   - Block Size + 40 
: char {4}     - WAVE Header ('WAVE') 
: char {4}     - fmt Header ('fmt ') 
: uint32 {4}   - Size of fmt block (20) 
: byte {2}     - PCM Code (If its normal pcm then = 1. If its xbox adpcm then = 105) 
: byte {2}     - Number of Channels 
: uint32 {4}   - Samplerate 
: uint32 {4}   - Byterate (If its normal pcm then = (SampleRate * No Channels * 16) div 8 . If its xbox adpcm then = No Channels * 24806) 
: byte {2}     - Block Align (If its normal pcm then = 16. If its xbox adpcm then = 4) 
: byte {2}     - Bits Per Sample (If its normal pcm then = (No Channels * 16) div 8. If its xbox adpcm then = No Channels * 36 ) 
: uint32 {4}   - Extra Data (If its normal pcm then = 16. If its xbox adpcm then = 4194306) 
: char {4}     - DATA Header ('DATA') 
: uint32 {4}   - Data Block Size (Size of data block in archive) 

Extra Checks: 
Sometimes the Number of Channels=0 so change this to 1. 
</tt>

=== Notes and Comments ===

ISB files contain the audio data and are only used in the pc version, the xbox and ps2 versions store audio differently. ISB files contain 3 types of audio: 
: Ogg - Standard Ogg Audio 
: PCM - Standard Wave PCM 
: Xbox ADPCM - As used by many Xbox games 

The OGG and PCM audio can be played easily, to play the Xbox ADPCM however you either need to pass it through a decoder (there's one in [http://quick.mixnmojo.com/software.php#psychonautsexplorer Psychonauts Explorer]) or install the Xbox ADPCM codec. 

=== Supported Programs ===

* [http://quick.mixnmojo.com/software.php#psychonautsexplorer Psychonauts Explorer]

Psychonauts ISB - Revision history

imported>Ikskoks at 13:24, 17 January 2021

imported>Ikskoks at 13:24, 17 January 2021

imported>WATTO at 05:45, 12 December 2005

imported>WATTO at 05:45, 12 December 2005