Resource Container (RCO)

Description

Resource Container Objet (RCO) contents are loaded by XMB modules (also known as .sprx plugins), see Plugin Interfaces and VSH

• Compression types availables:
  • ZLIB
  • RLZ
  • Uncompressed

Contents

• RCO contents (See Multimedia Formats and Tools):

Text for all languages, textures, sounds (for cursor navigation, trophy unlocking, etc...) and models

RCO format	Embedded code	Text	Textures	Sounds	Models	Script
Generic	RCOXML	utf8, utf16, utf32	gim, png, jpg, tif, gif, bmp	vag, unknown0x0	gmo	PlayStation JavaScript
PS3 specific	RCOXML	utf16	gim, png, jpg	vag	n/a	n/a

Versions

RCO version	Firmware	Release date	Notes
0x55	0.6.5	pre-retail	archaic rco format, header is 12 bytes smaller
0x70	1.00	2004 / 12 / 12
0x71	1.50~2.50	2005 / 3 / 24	normal table section up to this version
0x90	2.60	2005 / 11 / 29	zlib compressed table section implemented
0x95	2.70~2.71	2006 / 4 / 25	rlz compressed table section implemented
0x96	2.80~3.40	2006 / 7 / 27
0x97	1.00~1.54	2006 / 11 / 11
0x100	3.50~6.61	2007 / 5 / 31
0x102	1.60~1.70	2007 / 3 / 22
0x104	1.80~1.82	2007 / 5 / 24
0x105	1.90~1.94	2007 / 7 / 24
0x106	2.00~2.17	2007 / 11 / 8
0x107	2.20~2.80	2008 / 3 / 25
0x108	3.00~3.01	2009 / 9 / 1
0x110	3.10~3.74	2009 / 11 / 19
0x120	4.00~4.25	2011 / 11 / 29
0x130	4.30~4.76	2012 / 10 / 24

RCO Structure

The container structure can be represented as an XML (see RCOXML), with rcomage is posible to generate this XML when extracting, and for rebuilding the rco using the XML as a layout

http://endlessparadigm.com/forum/showthread.php?tid=231 (outdated)

Header

Offset	Length	Name	Example	Notes
0x00	0x04	magic	FRP	In PS3 is "FRP" (big endian). In PSP is "PRF" (little endian)
0x04	0x04	version	00 00 01 30	named minFirmwareVer in rcomage, see Discussion page
0x08	0x04	unknown	00 00 00 00
0x0C	0x04	compress_header	00 00 00 00	*0x00 no compress *0x10 zlib *0x20 rlz ?
0x10	0x04	info_table_offset	00 00 00 A4	usually 0xA4
0x14	0x04	vsmx_table_offset
0x18	0x04	text_table_offset
0x1C	0x04	sound_table_offset
0x20	0x04	model_table_offset
0x24	0x04	image_table_offset
0x28	0x04	unknown	FF FF FF FF	Always seems to be 0xFFFFFF
0x2C	0x04	font_table_offset
0x30	0x04	page_table_offset
0x34	0x04	anim_table_offset

strings

Offset	Length	Name	Example	Notes
0x38	0x04	text_table_offset
0x3C	0x04	text_table_length
0x40	0x04	label_table_offset
0x44	0x04	label_table_length
0x48	0x04	native_table_offset
0x4C	0x04	native_table_length

pointers

Offset	Length	Name	Example	Notes
0x50	0x04	text_pointer_table_offset
0x54	0x04	text_pointer_table_length
0x58	0x04	image_pointer_table_offset
0x5C	0x04	image_pointer_table_length
0x60	0x04	model_pointer_table_offset
0x64	0x04	model_pointer_table_length
0x68	0x04	sound_pointer_table_offset
0x6C	0x04	sound_pointer_table_length
0x70	0x04	page_pointer_table_offset
0x74	0x04	page_pointer_table_length
0x78	0x04	anim_pointer_table_offset
0x7C	0x04	anim_pointer_table_length

files

Offset	Length	Name	Example	Notes
0x80	0x04	image_data_section_offset
0x84	0x04	image_data_section_length
0x88	0x04	sound_data_section_offset
0x8C	0x04	sound_data_section_length
0x90	0x04	model_data_section_offset
0x94	0x04	model_data_section_length
0x98	0x04	unknown		Always seems to be 0xFFFFFF
0x9C	0x04	unknown		Always seems to be 0xFFFFFF
0xA0	0x04	unknown		Always seems to be 0xFFFFFF

info/main/xml table

This area works as an index of all the .rco contents, when the area is compressed there are 12 bytes at the beggining with info about this compression, aftr it starts the info, is composed by entries that follows a hierarchy of parent/children/brother and every entry defines an element wich can have several attributes. All this info can be represented as an xml file (this is what rcomage names an RCOXML)

When the table is compressed at beggining there are 3 values related with the compression (otherway if the table is not compressed this 3 values doesnt exists)

Offset	Length	Name	Example	Notes
0x00	0x04	lenPacked		Packed size of all the table sections
0x04	0x04	lenUnpacked		Unpacked size of all the table sections
0x08	0x04	lenLongestText		length of the longest language's text data (unpacked)

And then it starts with the entries, every entry has an area at begining that is common, in it is specifyed the entry_type, the values that comes after this area are dependant of the entry type

Offset	Length	Name	Example	Notes
0x00	0x01	hierarchy_depth ?		main table uses 0x01, may be used as a current entry depth value
0x01	0x01	entry_type		*0x1=MainTree *0x2=ScriptTree *0x3=TextTree *0x4=ImageTree *0x5=ModelTree *0x6=SoundTree *0x7=FontTree *0x8=ObjectTree *0x9=AnimTree
0x02	0x02	unknown		Always seems to be 0x0000
0x04	0x04	entry_label_offset		Offset to the label (relative to the label table). 0xFFFFFFFF means the label doesn't exist for this entry
0x08	0x04	entry_header_size		sizeof(RCOEntry) = 0x28 [ only used for entries with extra info (ie not "main" entries) ]
0x0C	0x04	entry_size		main tables (main/img etc) uses 0x28 here, or is this the length of current entry (not including subentries)?
0x10	0x04	children_number
0x14	0x04	next_entry_offset
0x18	0x04	previous_entry_offset
0x1C	0x04	parent_offset
0x20	0x04	unknown
0x24	0x04	unknown

After the common area it starts with the info specific for the entry_type, in wiki this has been separated in different pages...