CHD (Gotcha Force): Difference between revisions

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Latest revision as of 13:32, 7 October 2023

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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?

@@ Line 1: / Line 1: @@
 [[Gotcha Force | &larr; Gotcha Force]]
-''Cet article est pour les format de fichiers CHD de Gotcha Force. Voir [[CHD (Format de fichier)]] pour les autres versions de ce fichier.''
+''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>
-PGCD des tailles des chd = 16
+GCD of CHD lengths = 16
-Les fichiers CHD contiennent différentes sections :
+CHD files contain several blocks:
-*0x0 "Head" Header CHD
-x4 : Amène au header Prog.
-x8 : Indique une quantité ?
-xC : Taille du fichier complet.
-x10 ?
-x14 ?
-x18 Amène au header Smpl.
-x1C Amène au header DSPi.
-*0x20 "Prog" <span style="color: rgb(241, 196, 15);"> Pourrait faire référence à du script audio.</span>
-x24 : Taille du block data.
-x28 : Indique une quantité ?
-x2C : -1 ?
-*0x0 "Smpl" Samples ?
-x4 : Taille du block data.
-x8 : Quantité de samples? (En hexadecimal. Ex 0x68 = 104 + 1(0,1,2....104))
-xC : -1 ?
-*0x0 "Dspi" <span style="color: rgb(241, 196, 15);">DSP pour DSPADPCM, Piste possible : Liste des DSP dans [[DPK (Gotcha Force)]].</span>
-x4 : Taille du block data.
-x8 : Quantité de DSP? (En hexadecimal)
-xC : -1 ?
+'''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"''' <span style="color: rgb(241, 196, 15);"> It could describe audio datas or script.</span>
+* 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"''' <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.
+* 0x8 - 4 bytes - DSP count? (In hexadecimal)
+* 0xC - 4 bytes - -1?
 [[Category:File format]]
 [[Category:Gotcha Force]]