Pmd2 AT4PX - Revision history

UniqueGeek at 21:18, 14 October 2017

2017-10-14T21:18:29Z

@@ Line 3: / Line 3: @@
 [[Category:Technical References]]
 {{DISPLAYTITLE:AT4PX File Format}}
-The AT4PX container is a format used to contain compressed image data exclusively, as opposed to [[pmd2_PKDPX|PKDPX]] which is more of a generic compressed container.
+{{#externalredirect: https://projectpokemon.org/docs/mystery-dungeon-nds/at4px-file-format-r40/}}
 [[Category:NDS Mystery Dungeon]]
 [[Category:Game Data]]

UniqueGeek at 00:04, 3 February 2017

2017-02-03T00:04:47Z

← Older revision		Revision as of 00:04, 3 February 2017
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	== Credits ==		== Credits ==
	A big thanks to [https://github.com/Zhorken Zhorken] who figured out the header and the compression format!		A big thanks to [https://github.com/Zhorken Zhorken] who figured out the header and the compression format!

			[[Category:NDS Mystery Dungeon]]
			[[Category:Game Data]]

Psy commando: Re-worded intro, added mention of SIR0 wrapped AT4PX

2015-03-22T19:19:26Z

Re-worded intro, added mention of SIR0 wrapped AT4PX

← Older revision		Revision as of 19:19, 22 March 2015
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	[[Category:ROM Hacking]]		[[Category:ROM Hacking]]
	[[Category:Technical References]]		[[Category:Technical References]]
	The AT4PX container is a format used to contain compressed image data exclusively, as opposed to [[pmd2_PKDPX\|PKDPX]] which is more of a generic compressed container. ~~The contained image's format vary, depending on the context, or file extension in which the~~ AT4PX container ~~was found in~~.		{{DISPLAYTITLE:AT4PX File Format}}
			The AT4PX container is a format used to contain compressed image data exclusively, as opposed to [[pmd2_PKDPX\|PKDPX]] which is more of a generic compressed container.
			Its not unusual to find AT4PX containers wrapped itself by a [[Pmd2_SIR0\|SIR0]] container.
	Its content is compressed using a custom compression format dubbed [[pmd2_PX_Compression\|PX Compression]] for the lack of a better name.		Its content is compressed using a custom compression format dubbed [[pmd2_PX_Compression\|PX Compression]] for the lack of a better name.

Line 50:		Line 52:

	== Credits ==		== Credits ==
	A big thanks to [https://github.com/Zhorken Zhorken]who figured out the header and the compression format!		A big thanks to [https://github.com/Zhorken Zhorken] who figured out the header and the compression format!

Psy commando: added a more visible link to the PX compression page

2015-03-21T22:35:01Z

added a more visible link to the PX compression page

← Older revision		Revision as of 22:35, 21 March 2015
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	\|-		\|-
	\| 0x12		\| 0x12
	\| colspan=5 \| ..The compressed data begins immediately here!..		\| colspan=5 \| ..The [[pmd2_PX_Compression\|PX compressed]] data begins immediately here!..
	\|}		\|}

	== Credits ==		== Credits ==
	A big thanks to [https://github.com/Zhorken Zhorken]who figured out the header and the compression format!		A big thanks to [https://github.com/Zhorken Zhorken]who figured out the header and the compression format!

Psy commando: Created the AT4PX container page.

2014-12-12T04:38:22Z

Created the AT4PX container page.

New page

[[Category:Structures]]
[[Category:ROM Hacking]]
[[Category:Technical References]]
The AT4PX container is a format used to contain compressed image data exclusively, as opposed to [[pmd2_PKDPX|PKDPX]] which is more of a generic compressed container. The contained image's format vary, depending on the context, or file extension in which the AT4PX container was found in.
Its content is compressed using a custom compression format dubbed [[pmd2_PX_Compression|PX Compression]] for the lack of a better name.

== File Structure ==
The structure is very simple. A 18 bytes long header followed with the compressed data.

{| class="wikitable"
|+ Overview
! Offset
! Length
! Endianness
! Type
! Name
! Description
|-
| 0x00
| 5
| big
|
| Magic Number
| The magic number, made of the ASCII characters "AT4PX" {0x41, 0x54, 0x34, 0x50, 0x58}
|-
| 0x05
| 2
| little
| uint16
| Container Length
| The length from the beginning of the header to the end of the compressed data.
|-
| 0x07
| 9
|
| byte array
| Ctrl Flags Array
| A list of flags to be used in decompressing the container's content. More detail about their purpose on the [[pmd2_PX_Compression|PX Compression]] page. They're really nybbles stored in the lower half of a single byte each.
|-
| 0x10
| '''2'''
| little
| uint16
| Decompressed Data Length
| This is the length of the raw input data before it was compressed. Note how the length of this field differ from the [[pmd2_PKDPX|PKDPX]] format's own Decompressed Data Length !
|-
| 0x12
| colspan=5 | ..The compressed data begins immediately here!..
|}

== Credits ==
A big thanks to [https://github.com/Zhorken Zhorken]who figured out the header and the compression format!