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CHD (Gotcha Force): Difference between revisions

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[[Gotcha Force | ← Gotcha Force]]
[[Gotcha Force | ← Gotcha Force]]


''This article is about Gotcha Force CHD file format and ongoing researchs on it.''
''This article is about Gotcha Force CHD file format and ongoing researches on it.''


<div style="text-align: center;">
{{Research | 3| Researches on headers / bodies structures has to be done. }}
<div style="color: red;">This section needs a lot of research.</div>
<div style="color: red; text-align: center;">Research on how the header works and how the file interacts is needed.</div>
</div>


GCD of CHD lengths = 16
GCD of CHD lengths = 16


CHD files contains several blocks:
CHD files contain several blocks:


'''0x0 "Head"''' Header CHD
'''0x0 "Head"''' Header CHD
Line 23: Line 20:
* 0x24 - 4 bytes uint - data block length.
* 0x24 - 4 bytes uint - data block length.
* 0x28 - 4 bytes - Quantity?
* 0x28 - 4 bytes - Quantity?
* 0x2C - 4 bytes - -1 ?
* 0x2C - 4 bytes - -1?
'''0x0 "Smpl"''' Samples ?
'''0x0 "Smpl"''' Samples?
* 0x4 - 4 bytes uint - data block length.
* 0x4 - 4 bytes uint - data block length.
* 0x8 - 4 bytes - Samples count? (In hexadecimal - Ex 0x68 = 104 + 1(0,1,2....104))
* 0x8 - 4 bytes - Samples count? (In hexadecimal - Ex 0x68 = 104 + 1(0,1,2....104))
* 0xC - 4 bytes - -1 ?
* 0xC - 4 bytes - -1?
'''0x0 "Dspi"''' <span style="color: rgb(241, 196, 15);">DSP for DSPADPCM, idea for further investigations: List of DSP in [[DPK (Gotcha Force)]].</span>
'''0x0 "Dspi"''' <span style="color: rgb(241, 196, 15);">DSP for DSPADPCM, idea for further investigations: List of DSP in [[DPK (Gotcha Force)]].</span>
* 0x4 - 4 bytes uint - data block length.
* 0x4 - 4 bytes uint - data block length.
* 0x8 - 4 bytes - DSP count? (In hexadecimal)
* 0x8 - 4 bytes - DSP count? (In hexadecimal)
* 0xC - 4 bytes - -1 ?
* 0xC - 4 bytes - -1?


[[Category:File format]]
[[Category:File format]]
[[Category:Gotcha Force]]
[[Category:Gotcha Force]]

Latest revision as of 13:32, 7 October 2023

← Gotcha Force

This article is about Gotcha Force CHD file format and ongoing researches on it.


This file format needs a lot of research.
Researches on headers / bodies structures has to be done.


GCD of CHD lengths = 16

CHD files contain several blocks:

0x0 "Head" Header CHD

  • 0x4 - 4 bytes uint - Prog block header offset.
  • 0x8 - 4 bytes - Quantity?
  • 0xC - 4 bytes uint - Total file length.
  • 0x10 - 4 bytes - Unknown
  • 0x14 - 4 bytes - Unknown
  • 0x18 - 4 bytes uint - Smpl block header offset.
  • 0x1C - 4 bytes uint - DSPi block header offset.

0x20 "Prog" It could describe audio datas or script.

  • 0x24 - 4 bytes uint - data block length.
  • 0x28 - 4 bytes - Quantity?
  • 0x2C - 4 bytes - -1?

0x0 "Smpl" Samples?

  • 0x4 - 4 bytes uint - data block length.
  • 0x8 - 4 bytes - Samples count? (In hexadecimal - Ex 0x68 = 104 + 1(0,1,2....104))
  • 0xC - 4 bytes - -1?

0x0 "Dspi" DSP for DSPADPCM, idea for further investigations: List of DSP in DPK (Gotcha Force).

  • 0x4 - 4 bytes uint - data block length.
  • 0x8 - 4 bytes - DSP count? (In hexadecimal)
  • 0xC - 4 bytes - -1?